4.1.0

Alternate implementation of #1136

.github/ISSUE_TEMPLATE/bug_report.yml

@@ -60,4 +60,6 @@ body:
         - label: I ticked all of the boxes without actually reading them
           required: false
         - label: I have read the Compatibility wiki page and am not trying to run the plugin on an unsupported server version / platform
+          required: true
+        - label: I am willing to cooperate to get this issue resolved faster, including providing any additional information requested or testing new builds
           required: true

.github/ISSUE_TEMPLATE/compatibility_issue.yml

@@ -0,0 +1,38 @@
+name: Compatibility issue
+description: A compatibility issue with another plugin/mod or a specific version of a platform marked as supported
+labels: ["Type: Compatibility issue"]
+body:
+  - type: input
+    attributes:
+      label: TAB version
+      description: Full version in numbers, "latest" is not a version.
+      placeholder: 4.0.0
+    validations:
+      required: true
+
+  - type: textarea
+    attributes:
+      label: Software causing compatibility issue
+      description: plugin/mod/platform version causing the issue
+    validations:
+      required: true
+
+  - type: textarea
+    attributes:
+      label: Additional info
+      description: Anything else you want to provide that will help in resolving the issue faster.
+    validations:
+      required: false
+  - type: checkboxes
+    attributes:
+      label: Checklist
+      description: Let's make sure this report is valid
+      options:
+        - label: I am running latest version of the plugin
+          required: true
+        - label: I ticked all of the boxes without actually reading them
+          required: false
+        - label: The compatibility wiki page does not mention this incompatibility
+          required: true
+        - label: I am willing to cooperate to get this issue resolved faster, including providing any additional information requested or testing new builds
+          required: true

.github/ISSUE_TEMPLATE/config.yml

@@ -0,0 +1 @@
+blank_issues_enabled: false

.github/workflows/build.yml

@@ -3,9 +3,6 @@ on:
   push:
     branches:
       - master
-      - v4
-  pull_request:
-    types: [opened, synchronize, reopened]
 jobs:
   build:
     name: Build
@@ -41,5 +38,5 @@ jobs:
       - name: Upload a Build Artifact
         uses: actions/upload-artifact@v3.1.2 #https://github.com/actions/upload-artifact/releases
         with:
-          name: Jar
+          name: Click here to download
           path: jar/build/libs/TAB-**.jar

README.md

@@ -3,6 +3,17 @@ TAB aims to be a superior all-in-one minecraft plugin for displaying information
 similar plugins in terms of features, performance and compatibility.  
 More information can be found at [Why TAB?](https://github.com/NEZNAMY/TAB/wiki/Why-TAB%3F) wiki page.
 
+# Download
+### Releases
+You can download full releases from [GitHub releases](https://github.com/NEZNAMY/TAB/releases), 
+[SpigotMC](https://www.spigotmc.org/resources/57806/) or [Modrinth](https://modrinth.com/plugin/tab-was-taken).
+
+### Dev builds
+Plugin's development is continuous and contains lots of small changes/fixes not worthy of being called a full
+update, therefore development builds are being created and eventually a full update is released when enough changes are made.  
+If you want to benefit from a recent change in the code before official release, you can download development builds
+from [GitHub actions](https://github.com/NEZNAMY/TAB/actions).  
+
 # Compiling
 Compilation requires JDK 17 and up.  
 To compile the plugin, run `./gradlew build` from the terminal.  
@@ -21,3 +32,26 @@ is in quality of the report. Bug reports where steps to reproduce are "idk" have
 
 # Contributing
 See [CONTRIBUTING.md](https://github.com/NEZNAMY/TAB/blob/master/CONTRIBUTING.md)
+
+# Provided services
+The plugin is being used by a large amount of servers, which also means the demand for my attention is high. Unfortunately, 
+I am no longer able to keep up with the demand since I don't want to dedicate my whole existence to a free plugin. 
+In order to provide the best quality of all provided services, the amount of services provided may vary over time. 
+Here is the full list of potential services and their status:
+
+| Service type                  | Availability |
+|-------------------------------|--------------|
+| Updates for new MC versions   | ✔            |
+| Bug fixes                     | ✔            |
+| Wiki updates<sup>1</sup>      | ✔            |
+| Feature requests              | ❌            |
+| Customer support<sup>2</sup>  | ✔            |
+| Free user support<sup>3</sup> | ❌            |
+| Optimization<sup>4</sup>      | ✔            |
+
+<sup>1</sup> - Adding new examples, guides and other kind of useful information people ask about.  
+<sup>2</sup> - Assistance with the plugin on discord, including answering any questions and helping with 
+configuration to those, who bought a copy of the plugin when it was purchasable.  
+<sup>3</sup> - Like <sup>2</sup>, but for anyone in the world who asks for it.  
+<sup>4</sup> - Improving plugin's performance while not losing out on any features. This was done 
+proactively a lot in the past, so there isn't much to do anymore, only if someone actually finds and reports something.  

api/src/main/java/me/neznamy/tab/api/bossbar/BarColor.java

@@ -5,5 +5,12 @@ package me.neznamy.tab.api.bossbar;
  * Calling ordinal() will return color's network ID.
  */
 public enum BarColor {
-    PINK, BLUE, RED, GREEN, YELLOW, PURPLE, WHITE
+
+    PINK,
+    BLUE,
+    RED,
+    GREEN,
+    YELLOW,
+    PURPLE,
+    WHITE
 }

api/src/main/java/me/neznamy/tab/api/bossbar/BarStyle.java

@@ -1,22 +1,14 @@
 package me.neznamy.tab.api.bossbar;
 
-import lombok.AllArgsConstructor;
-import lombok.Getter;
-
 /**
  * An enum representing all available BossBar styles.
  * Calling ordinal() will return style's network ID.
- * Style names are equal to NMS names.
  */
-@AllArgsConstructor
 public enum BarStyle {
 
-    PROGRESS("SOLID"),
-    NOTCHED_6("SEGMENTED_6"),
-    NOTCHED_10("SEGMENTED_10"),
-    NOTCHED_12("SEGMENTED_12"),
-    NOTCHED_20("SEGMENTED_20");
-
-    /** Style's name used in Bukkit API */
-    @Getter private final String bukkitName;
+    PROGRESS,
+    NOTCHED_6,
+    NOTCHED_10,
+    NOTCHED_12,
+    NOTCHED_20
 }

api/src/main/java/me/neznamy/tab/api/bossbar/BossBar.java

@@ -193,6 +193,20 @@ public interface BossBar {
      */
     @NotNull List<TabPlayer> getPlayers();
 
+    /**
+     * Returns {@code true} if this bossbar is visible to specified player based on
+     * display condition or adding via {@link #addPlayer(TabPlayer)}, {@code false} if not.
+     * <p>
+     * This may return {@code true} even if player cannot physically see the bossbar due to
+     * having it disabled via toggle command or {@link BossBarManager#toggleBossBar(TabPlayer, boolean)}
+     * (or {@link BossBarManager#setBossBarVisible(TabPlayer, boolean, boolean)}).
+     *
+     * @param   player
+     *          Player to check
+     * @return  {@code true} if player is allowed to see this Boss Bar, {@code false} if not.
+     */
+    boolean containsPlayer(TabPlayer player);
+
     /**
      * Returns {@code true} if this boss bar is configured as announcement-only bar,
      * {@code false} if not.

api/src/main/java/me/neznamy/tab/api/scoreboard/ScoreboardManager.java

@@ -6,6 +6,7 @@ import java.util.Map;
 import lombok.NonNull;
 import me.neznamy.tab.api.TabPlayer;
 import org.jetbrains.annotations.NotNull;
+import org.jetbrains.annotations.Nullable;
 
 /**
  * Interface allowing work with scoreboards, such as creating,
@@ -164,5 +165,5 @@ public interface ScoreboardManager {
      *          player to get active scoreboard of
      * @return  player's active scoreboard or {@code null} if player has no scoreboard
      */
-    @NotNull Scoreboard getActiveScoreboard(@NonNull TabPlayer player);
+    @Nullable Scoreboard getActiveScoreboard(@NonNull TabPlayer player);
 }

build.gradle.kts

@@ -4,7 +4,7 @@ plugins {
 
 allprojects {
     group = "me.neznamy"
-    version = "4.0.3-SNAPSHOT"
+    version = "4.1.0"
     description = "An all-in-one solution that works"
 
     ext.set("id", "tab")
@@ -15,11 +15,21 @@ allprojects {
 val platforms = setOf(
     projects.bukkit,
     projects.bungeecord,
-    projects.krypton,
     projects.velocity,
     projects.sponge7,
     projects.sponge8,
-    projects.fabric
+    projects.fabric,
+    projects.fabric.v1144,
+    projects.fabric.v1152,
+    projects.fabric.v1165,
+    projects.fabric.v117,
+    projects.fabric.v1171,
+    projects.fabric.v1182,
+    projects.fabric.v1192,
+    projects.fabric.v1193,
+    projects.fabric.v1201,
+    projects.fabric.v1202,
+    projects.fabric.v1203
 ).map { it.dependencyProject }
 
 val special = setOf(

bukkit/build.gradle.kts

@@ -4,5 +4,15 @@ dependencies {
     compileOnly("org.purpurmc.purpur:purpur-api:1.16.5-R0.1-SNAPSHOT")
     compileOnly("me.clip:placeholderapi:2.11.2")
     compileOnly("com.mojang:authlib:1.5.25")
-    compileOnly("com.github.MilkBowl:VaultAPI:1.7")
+    compileOnly("com.github.MilkBowl:VaultAPI:1.7") {
+        exclude("org.bukkit", "bukkit")
+    }
+    compileOnly("LibsDisguises:LibsDisguises:10.0.21") {
+        exclude("org.spigotmc", "spigot")
+        exclude("org.spigotmc", "spigot-api")
+        exclude("com.github.dmulloy2", "ProtocolLib")
+        exclude("org.ow2.asm", "asm")
+        exclude("net.md-5", "bungeecord-chat")
+    }
+    compileOnly("com.github.LeonMangler:PremiumVanishAPI:2.8.8")
 }

bukkit/src/main/java/me/neznamy/tab/platforms/bukkit/BukkitEventListener.java

@@ -1,5 +1,7 @@
 package me.neznamy.tab.platforms.bukkit;
 
+import me.neznamy.tab.platforms.bukkit.platform.BukkitPlatform;
+import me.neznamy.tab.shared.TAB;
 import me.neznamy.tab.shared.platform.EventListener;
 import me.neznamy.tab.shared.platform.TabPlayer;
 import org.bukkit.entity.Player;
@@ -10,6 +12,7 @@ import org.bukkit.event.player.PlayerChangedWorldEvent;
 import org.bukkit.event.player.PlayerCommandPreprocessEvent;
 import org.bukkit.event.player.PlayerJoinEvent;
 import org.bukkit.event.player.PlayerQuitEvent;
+import org.jetbrains.annotations.NotNull;
 
 /**
  * The core for bukkit forwarding events into all enabled features
@@ -37,7 +40,8 @@ public class BukkitEventListener extends EventListener<Player> implements Listen
     }
 
     @Override
-    public TabPlayer createPlayer(Player player) {
-        return new BukkitTabPlayer(player);
+    @NotNull
+    public TabPlayer createPlayer(@NotNull Player player) {
+        return new BukkitTabPlayer((BukkitPlatform) TAB.getInstance().getPlatform(), player);
     }
 }

bukkit/src/main/java/me/neznamy/tab/platforms/bukkit/BukkitPipelineInjector.java

@@ -2,19 +2,26 @@ package me.neznamy.tab.platforms.bukkit;
 
 import com.mojang.authlib.GameProfile;
 import io.netty.channel.Channel;
+import lombok.Getter;
 import lombok.SneakyThrows;
+import me.neznamy.tab.platforms.bukkit.nms.BukkitReflection;
 import me.neznamy.tab.platforms.bukkit.scoreboard.PacketScoreboard;
 import me.neznamy.tab.shared.TabConstants;
+import me.neznamy.tab.shared.chat.EnumChatFormat;
 import me.neznamy.tab.shared.features.nametags.NameTag;
 import me.neznamy.tab.shared.platform.TabList;
 import me.neznamy.tab.shared.platform.TabPlayer;
 import me.neznamy.tab.shared.chat.IChatBaseComponent;
-import me.neznamy.tab.platforms.bukkit.nms.storage.nms.NMSStorage;
 import me.neznamy.tab.shared.TAB;
 import me.neznamy.tab.shared.features.injection.NettyPipelineInjector;
 import me.neznamy.tab.shared.features.sorting.Sorting;
+import me.neznamy.tab.shared.util.ReflectionUtils;
+import org.bukkit.Bukkit;
 import org.jetbrains.annotations.NotNull;
+import org.jetbrains.annotations.Nullable;
 
+import java.lang.reflect.Field;
+import java.lang.reflect.Method;
 import java.util.*;
 import java.util.stream.Collectors;
 
@@ -23,6 +30,14 @@ import java.util.stream.Collectors;
  */
 public class BukkitPipelineInjector extends NettyPipelineInjector {
 
+    private static Method getHandle;
+    private static Field PLAYER_CONNECTION;
+    private static Field NETWORK_MANAGER;
+    private static Field CHANNEL;
+
+    @Getter
+    private static boolean available;
+
     /**
      * Constructs new instance
      */
@@ -30,29 +45,55 @@ public class BukkitPipelineInjector extends NettyPipelineInjector {
         super("packet_handler");
     }
 
-    @Override
-    protected Channel getChannel(@NotNull TabPlayer player) {
-        BukkitTabPlayer bukkit = (BukkitTabPlayer) player;
-        NMSStorage nms = NMSStorage.getInstance();
+    public static void tryLoad() {
         try {
-            if (nms.CHANNEL != null) return (Channel) nms.CHANNEL.get(nms.NETWORK_MANAGER.get(bukkit.getPlayerConnection()));
-        } catch (IllegalAccessException exception) {
-            TAB.getInstance().getErrorManager().printError("Failed to get channel of " + bukkit.getName(), exception);
+            Class<?> NetworkManager = BukkitReflection.getClass("network.Connection", "network.NetworkManager", "NetworkManager");
+            Class<?> PlayerConnection = BukkitReflection.getClass("server.network.ServerGamePacketListenerImpl",
+                    "server.network.PlayerConnection", "PlayerConnection");
+            Class<?> EntityPlayer = BukkitReflection.getClass("server.level.ServerPlayer", "server.level.EntityPlayer", "EntityPlayer");
+            getHandle = Class.forName("org.bukkit.craftbukkit." + BukkitReflection.getServerPackage() + ".entity.CraftPlayer").getMethod("getHandle");
+            PLAYER_CONNECTION = ReflectionUtils.getOnlyField(EntityPlayer, PlayerConnection);
+            if (BukkitReflection.is1_20_2Plus()) {
+                NETWORK_MANAGER = ReflectionUtils.getOnlyField(PlayerConnection.getSuperclass(), NetworkManager);
+            } else {
+                NETWORK_MANAGER = ReflectionUtils.getOnlyField(PlayerConnection, NetworkManager);
+            }
+            CHANNEL = ReflectionUtils.getOnlyField(NetworkManager, Channel.class);
+            available = true;
+        } catch (Exception e) {
+            Bukkit.getConsoleSender().sendMessage(EnumChatFormat.RED.getFormat() + "[TAB] Failed to initialize NMS fields for " +
+                    "network channel injection due to a compatibility error. This will make the following features not work: " +
+                    "Unlimited nametag mode, anti-override for tablist formatting & nametags, detecting nickname change for compatibility " +
+                    "with nick plugins and compatibility with other scoreboard plugins. " +
+                    "Please update the plugin a to version with native support for your server version to unlock the features.");
         }
-        return null;
+    }
+
+    @Override
+    @Nullable
+    @SneakyThrows
+    protected Channel getChannel(@NotNull TabPlayer player) {
+        return (Channel) CHANNEL.get(NETWORK_MANAGER.get(PLAYER_CONNECTION.get(getHandle.invoke(player.getPlayer()))));
     }
 
     @Override
     @SneakyThrows
     public void onDisplayObjective(@NotNull TabPlayer player, @NotNull Object packet) {
-        TAB.getInstance().getFeatureManager().onDisplayObjective(player,
-                PacketScoreboard.DisplayObjective_POSITION.getInt(packet),
-                (String) PacketScoreboard.DisplayObjective_OBJECTIVE_NAME.get(packet));
+        if (!PacketScoreboard.isAvailable()) return;
+        int position;
+        if (BukkitReflection.is1_20_2Plus()) {
+            position = ((Enum<?>)PacketScoreboard.displayPacketData.DisplayObjective_POSITION.get(packet)).ordinal();
+        } else {
+            position = PacketScoreboard.displayPacketData.DisplayObjective_POSITION.getInt(packet);
+        }
+        TAB.getInstance().getFeatureManager().onDisplayObjective(player, position,
+                (String) PacketScoreboard.displayPacketData.DisplayObjective_OBJECTIVE_NAME.get(packet));
     }
 
     @Override
     @SneakyThrows
     public void onObjective(@NotNull TabPlayer player, @NotNull Object packet) {
+        if (!PacketScoreboard.isAvailable()) return;
         TAB.getInstance().getFeatureManager().onObjective(player,
                 PacketScoreboard.Objective_METHOD.getInt(packet),
                 (String) PacketScoreboard.Objective_OBJECTIVE_NAME.get(packet));
@@ -60,77 +101,112 @@ public class BukkitPipelineInjector extends NettyPipelineInjector {
 
     @Override
     public boolean isDisplayObjective(@NotNull Object packet) {
-        return PacketScoreboard.DisplayObjectiveClass.isInstance(packet);
+        if (!PacketScoreboard.isAvailable()) return false;
+        return PacketScoreboard.displayPacketData.DisplayObjectiveClass.isInstance(packet);
     }
 
     @Override
     public boolean isObjective(@NotNull Object packet) {
+        if (!PacketScoreboard.isAvailable()) return false;
         return PacketScoreboard.ObjectivePacketClass.isInstance(packet);
     }
 
     @Override
     public boolean isTeam(@NotNull Object packet) {
-        return PacketScoreboard.TeamPacketClass.isInstance(packet);
+        if (!PacketScoreboard.isAvailable()) return false;
+        return PacketScoreboard.teamPacketData.TeamPacketClass.isInstance(packet);
     }
 
     @Override
     public boolean isPlayerInfo(@NotNull Object packet) {
-        return BukkitTabList.PacketPlayOutPlayerInfoClass.isInstance(packet);
+        return BukkitTabList.PlayerInfoClass.isInstance(packet);
     }
 
     @Override
-    @SneakyThrows
     public void onPlayerInfo(@NotNull TabPlayer receiver, @NotNull Object packet) {
-        NMSStorage nms = NMSStorage.getInstance();
-        List<String> actions;
-        if (BukkitTabList.ClientboundPlayerInfoRemovePacket != null) {
-            //1.19.3+
-            actions = ((EnumSet<?>)BukkitTabList.ACTION.get(packet)).stream().map(Enum::name).collect(Collectors.toList());
+        if (BukkitReflection.is1_19_3Plus()) {
+            onPlayerInfo1_19_3(receiver, packet);
         } else {
-            //1.19.2-
-            actions = Collections.singletonList(BukkitTabList.ACTION.get(packet).toString());
+            onPlayerInfo1_19_2(receiver, packet);
         }
+    }
+
+    @SneakyThrows
+    private void onPlayerInfo1_19_3(@NotNull TabPlayer receiver, @NotNull Object packet) {
+        List<String> actions = ((EnumSet<?>)BukkitTabList.ACTION.get(packet)).stream().map(Enum::name).collect(Collectors.toList());
         List<Object> updatedList = new ArrayList<>();
         for (Object nmsData : (List<?>) BukkitTabList.PLAYERS.get(packet)) {
-            GameProfile profile = (GameProfile) BukkitTabList.PlayerInfoData_getProfile.invoke(nmsData);
+            GameProfile profile = (GameProfile) BukkitTabList.PlayerInfoData_Profile.get(nmsData);
+            UUID id;
+            id = (UUID) BukkitTabList.PlayerInfoData_UUID.get(nmsData);
             Object displayName = null;
-            if (actions.contains(TabList.Action.UPDATE_DISPLAY_NAME.name()) || actions.contains(TabList.Action.ADD_PLAYER.name())) {
+            int latency = 0;
+            if (actions.contains(TabList.Action.UPDATE_DISPLAY_NAME.name())) {
                 displayName = BukkitTabList.PlayerInfoData_DisplayName.get(nmsData);
-                IChatBaseComponent newDisplayName = TAB.getInstance().getFeatureManager().onDisplayNameChange(receiver, profile.getId());
-                if (newDisplayName != null) displayName = nms.toNMSComponent(newDisplayName, receiver.getVersion());
-                if (!nms.is1_19_3Plus()) BukkitTabList.PlayerInfoData_DisplayName.set(nmsData, displayName);
+                IChatBaseComponent newDisplayName = TAB.getInstance().getFeatureManager().onDisplayNameChange(receiver, id);
+                if (newDisplayName != null) displayName = ((BukkitTabPlayer)receiver).getTabList().toComponent(newDisplayName);
             }
-            if (nms.is1_19_3Plus()) {
-                // 1.19.3 is using records, which do not allow changing final fields, need to rewrite the list entirely
-                updatedList.add(BukkitTabList.newPlayerInfoData.newInstance(
-                        profile.getId(),
-                        profile,
-                        BukkitTabList.PlayerInfoData_Listed.getBoolean(nmsData),
-                        BukkitTabList.PlayerInfoData_Latency.getInt(nmsData),
-                        BukkitTabList.PlayerInfoData_GameMode.get(nmsData),
-                        displayName,
-                        BukkitTabList.PlayerInfoData_RemoteChatSession.get(nmsData)));
+            if (actions.contains(TabList.Action.UPDATE_LATENCY.name())) {
+                latency = TAB.getInstance().getFeatureManager().onLatencyChange(receiver, id, BukkitTabList.PlayerInfoData_Latency.getInt(nmsData));
+            }
+            if (actions.contains(TabList.Action.ADD_PLAYER.name())) {
+                TAB.getInstance().getFeatureManager().onEntryAdd(receiver, id, profile.getName());
+            }
+            // 1.19.3 is using records, which do not allow changing final fields, need to rewrite the list entirely
+            updatedList.add(BukkitTabList.newPlayerInfoData.newInstance(
+                    id,
+                    profile,
+                    BukkitTabList.PlayerInfoData_Listed.getBoolean(nmsData),
+                    latency,
+                    BukkitTabList.PlayerInfoData_GameMode.get(nmsData),
+                    displayName,
+                    BukkitTabList.PlayerInfoData_RemoteChatSession.get(nmsData)));
+        }
+        BukkitTabList.PLAYERS.set(packet, updatedList);
+    }
+
+    @SneakyThrows
+    private void onPlayerInfo1_19_2(@NotNull TabPlayer receiver, @NotNull Object packet) {
+        String action = BukkitTabList.ACTION.get(packet).toString();
+        for (Object nmsData : (List<?>) BukkitTabList.PLAYERS.get(packet)) {
+            GameProfile profile = (GameProfile) BukkitTabList.PlayerInfoData_Profile.get(nmsData);
+            UUID id = profile.getId();
+            if (action.equals(TabList.Action.UPDATE_DISPLAY_NAME.name()) || action.equals(TabList.Action.ADD_PLAYER.name())) {
+                Object displayName = BukkitTabList.PlayerInfoData_DisplayName.get(nmsData);
+                IChatBaseComponent newDisplayName = TAB.getInstance().getFeatureManager().onDisplayNameChange(receiver, id);
+                if (newDisplayName != null) displayName = ((BukkitTabPlayer)receiver).getTabList().toComponent(newDisplayName);
+                BukkitTabList.PlayerInfoData_DisplayName.set(nmsData, displayName);
+            }
+            if (action.equals(TabList.Action.UPDATE_LATENCY.name()) || action.equals(TabList.Action.ADD_PLAYER.name())) {
+                int latency = TAB.getInstance().getFeatureManager().onLatencyChange(receiver, id, BukkitTabList.PlayerInfoData_Latency.getInt(nmsData));
+                BukkitTabList.PlayerInfoData_Latency.set(nmsData, latency);
+            }
+            if (action.equals(TabList.Action.ADD_PLAYER.name())) {
+                TAB.getInstance().getFeatureManager().onEntryAdd(receiver, id, profile.getName());
             }
         }
-        if (nms.is1_19_3Plus()) {
-            BukkitTabList.PLAYERS.set(packet, updatedList);
-        }
+    }
+
+    @Override
+    public boolean isLogin(@NotNull Object packet) {
+        return false;
     }
 
     @SuppressWarnings("unchecked")
     @Override
     @SneakyThrows
     public void modifyPlayers(@NotNull Object packetPlayOutScoreboardTeam) {
+        if (!PacketScoreboard.isAvailable()) return;
         if (TAB.getInstance().getNameTagManager() == null) return;
-        int action = PacketScoreboard.TeamPacket_ACTION.getInt(packetPlayOutScoreboardTeam);
+        int action = PacketScoreboard.teamPacketData.TeamPacket_ACTION.getInt(packetPlayOutScoreboardTeam);
         if (action == 1 || action == 2 || action == 4) return;
-        Collection<String> players = (Collection<String>) PacketScoreboard.TeamPacket_PLAYERS.get(packetPlayOutScoreboardTeam);
-        String teamName = (String) PacketScoreboard.TeamPacket_NAME.get(packetPlayOutScoreboardTeam);
+        Collection<String> players = (Collection<String>) PacketScoreboard.teamPacketData.TeamPacket_PLAYERS.get(packetPlayOutScoreboardTeam);
+        String teamName = (String) PacketScoreboard.teamPacketData.TeamPacket_NAME.get(packetPlayOutScoreboardTeam);
         if (players == null) return;
         //creating a new list to prevent NoSuchFieldException in minecraft packet encoder when a player is removed
         Collection<String> newList = new ArrayList<>();
         for (String entry : players) {
-            TabPlayer p = TAB.getInstance().getPlayer(entry);
+            TabPlayer p = getPlayer(entry);
             if (p == null) {
                 newList.add(entry);
                 continue;
@@ -148,6 +224,6 @@ public class BukkitPipelineInjector extends NettyPipelineInjector {
                 newList.add(entry);
             }
         }
-        PacketScoreboard.TeamPacket_PLAYERS.set(packetPlayOutScoreboardTeam, newList);
+        PacketScoreboard.teamPacketData.TeamPacket_PLAYERS.set(packetPlayOutScoreboardTeam, newList);
     }
 }

bukkit/src/main/java/me/neznamy/tab/platforms/bukkit/BukkitPlaceholderRegistry.java

@@ -1,82 +0,0 @@
-package me.neznamy.tab.platforms.bukkit;
-
-import me.neznamy.tab.shared.TabConstants;
-import me.neznamy.tab.api.placeholder.PlaceholderManager;
-import me.neznamy.tab.shared.placeholders.UniversalPlaceholderRegistry;
-import net.milkbowl.vault.chat.Chat;
-import org.bukkit.Bukkit;
-import org.bukkit.entity.Player;
-import org.bukkit.plugin.RegisteredServiceProvider;
-import org.jetbrains.annotations.NotNull;
-
-import java.lang.reflect.Field;
-import java.lang.reflect.Method;
-
-/**
- * Bukkit registry to register bukkit-only and universal placeholders
- */
-public class BukkitPlaceholderRegistry extends UniversalPlaceholderRegistry {
-
-    private Chat chat;
-
-    /** NMS server to get TPS from on spigot */
-    private Object server;
-
-    /** TPS field*/
-    private Field recentTps;
-
-    /** Detection for presence of Paper's TPS getter */
-    private Method paperTps;
-
-    /** Detection for presence of Paper's MSPT getter */
-    private Method paperMspt;
-
-    /**
-     * Constructs new instance and loads hooks
-     */
-    public BukkitPlaceholderRegistry() {
-        try {
-            server = Bukkit.getServer().getClass().getMethod("getServer").invoke(Bukkit.getServer());
-            recentTps = server.getClass().getField("recentTps");
-        } catch (ReflectiveOperationException e) {
-            //not spigot
-        }
-        try { paperTps = Bukkit.class.getMethod("getTPS"); } catch (NoSuchMethodException ignored) {}
-        try { paperMspt = Bukkit.class.getMethod("getAverageTickTime"); } catch (NoSuchMethodException ignored) {}
-        if (Bukkit.getPluginManager().isPluginEnabled("Vault")) {
-            RegisteredServiceProvider<Chat> rspChat = Bukkit.getServicesManager().getRegistration(Chat.class);
-            if (rspChat != null) chat = rspChat.getProvider();
-        }
-    }
-
-    @SuppressWarnings("deprecation")
-    @Override
-    public void registerPlaceholders(@NotNull PlaceholderManager manager) {
-        manager.registerPlayerPlaceholder(TabConstants.Placeholder.DISPLAY_NAME, 500, p -> ((Player) p.getPlayer()).getDisplayName());
-        if (paperTps != null) {
-            manager.registerServerPlaceholder(TabConstants.Placeholder.TPS, 1000, () -> formatTPS(Bukkit.getTPS()[0]));
-        } else if (recentTps != null) {
-            manager.registerServerPlaceholder(TabConstants.Placeholder.TPS, 1000, () -> {
-                try {
-                    return formatTPS(((double[]) recentTps.get(server))[0]);
-                } catch (IllegalAccessException e) {
-                    return -1;
-                }
-            });
-        } else {
-            manager.registerServerPlaceholder(TabConstants.Placeholder.TPS, -1, () -> -1);
-        }
-        if (paperMspt != null) {
-            manager.registerServerPlaceholder(TabConstants.Placeholder.MSPT, 1000, () -> format(Bukkit.getAverageTickTime()));
-        }
-        manager.registerPlayerPlaceholder(TabConstants.Placeholder.HEALTH, 100, p -> (int) Math.ceil(((Player) p.getPlayer()).getHealth()));
-        if (chat != null) {
-            manager.registerPlayerPlaceholder("%vault-prefix%", 1000, p -> chat.getPlayerPrefix((Player) p.getPlayer()));
-            manager.registerPlayerPlaceholder("%vault-suffix%", 1000, p -> chat.getPlayerSuffix((Player) p.getPlayer()));
-        } else {
-            manager.registerServerPlaceholder("%vault-prefix%", -1, () -> "");
-            manager.registerServerPlaceholder("%vault-suffix%", -1, () -> "");
-        }
-        super.registerPlaceholders(manager);
-    }
-}

bukkit/src/main/java/me/neznamy/tab/platforms/bukkit/BukkitTAB.java

@@ -1,51 +1,28 @@
 package me.neznamy.tab.platforms.bukkit;
 
+import me.neznamy.tab.platforms.bukkit.nms.*;
 import me.neznamy.tab.platforms.bukkit.platform.BukkitPlatform;
 import me.neznamy.tab.platforms.bukkit.platform.FoliaPlatform;
 import me.neznamy.tab.shared.ProtocolVersion;
-import me.neznamy.tab.shared.TabConstants;
 import me.neznamy.tab.shared.chat.EnumChatFormat;
-import me.neznamy.tab.platforms.bukkit.nms.storage.nms.*;
 import me.neznamy.tab.shared.TAB;
 import me.neznamy.tab.shared.util.ReflectionUtils;
-import org.bstats.bukkit.Metrics;
-import org.bstats.charts.SimplePie;
 import org.bukkit.Bukkit;
-import org.bukkit.command.*;
 import org.bukkit.plugin.java.JavaPlugin;
 
 /**
- * Main class for Bukkit platform
+ * Main class for Bukkit.
  */
 public class BukkitTAB extends JavaPlugin {
 
     @Override
     public void onEnable() {
-        String version = Bukkit.getBukkitVersion().split("-")[0];
-        String serverPackage = Bukkit.getServer().getClass().getPackage().getName().split("\\.")[3];
-        Bukkit.getConsoleSender().sendMessage(EnumChatFormat.color("[TAB] Server version: " + version + " (" + serverPackage + ")"));
         if (!isVersionSupported()) {
             Bukkit.getPluginManager().disablePlugin(this);
             return;
         }
-        BukkitPlatform platform = ReflectionUtils.classExists("io.papermc.paper.threadedregions.RegionizedServer") ?
-                new FoliaPlatform(this) : new BukkitPlatform(this);
-        TAB.setInstance(new TAB(platform, ProtocolVersion.fromFriendlyName(version), getDataFolder()));
-        if (TAB.getInstance().getServerVersion() == ProtocolVersion.UNKNOWN_SERVER_VERSION) {
-            Bukkit.getConsoleSender().sendMessage(EnumChatFormat.color("&c[TAB] Unknown server version: " + Bukkit.getBukkitVersion() + "! Plugin may not work correctly."));
-        }
-        Bukkit.getPluginManager().registerEvents(new BukkitEventListener(), this);
-        TAB.getInstance().load();
-        Metrics metrics = new Metrics(this, 5304);
-        metrics.addCustomChart(new SimplePie(TabConstants.MetricsChart.UNLIMITED_NAME_TAG_MODE_ENABLED, () -> TAB.getInstance().getFeatureManager().isFeatureEnabled(TabConstants.Feature.UNLIMITED_NAME_TAGS) ? "Yes" : "No"));
-        metrics.addCustomChart(new SimplePie(TabConstants.MetricsChart.PLACEHOLDER_API, () -> platform.isPlaceholderAPI() ? "Yes" : "No"));
-        metrics.addCustomChart(new SimplePie(TabConstants.MetricsChart.PERMISSION_SYSTEM, () -> TAB.getInstance().getGroupManager().getPermissionPlugin()));
-        metrics.addCustomChart(new SimplePie(TabConstants.MetricsChart.SERVER_VERSION, () -> "1." + TAB.getInstance().getServerVersion().getMinorVersion() + ".x"));
-        PluginCommand cmd = Bukkit.getPluginCommand(TabConstants.COMMAND_BACKEND);
-        if (cmd == null) return;
-        BukkitTabCommand command = new BukkitTabCommand();
-        cmd.setExecutor(command);
-        cmd.setTabCompleter(command);
+        TAB.create(ReflectionUtils.classExists("io.papermc.paper.threadedregions.RegionizedServer") ?
+                new FoliaPlatform(this) : new BukkitPlatform(this));
     }
 
     @Override
@@ -63,20 +40,19 @@ public class BukkitTAB extends JavaPlugin {
      */
     private boolean isVersionSupported() {
         try {
-            long time = System.currentTimeMillis();
-            String serverPackage = Bukkit.getServer().getClass().getPackage().getName().split("\\.")[3];
-            int minorVersion = Integer.parseInt(serverPackage.split("_")[1]);
-            NMSStorage.setInstance(minorVersion >= 17 ? new BukkitModernNMSStorage() : new BukkitLegacyNMSStorage());
-            Bukkit.getConsoleSender().sendMessage(EnumChatFormat.color("[TAB] Loaded NMS hook in " + (System.currentTimeMillis()-time) + "ms"));
+            DataWatcher.load();
+            PacketEntityView.load();
+            BukkitTabList.load();
             return true;
         } catch (Exception ex) {
             if (ProtocolVersion.fromFriendlyName(Bukkit.getBukkitVersion().split("-")[0]) == ProtocolVersion.UNKNOWN_SERVER_VERSION) {
-                Bukkit.getConsoleSender().sendMessage(EnumChatFormat.color("&c[TAB] Your server version is not compatible. " +
-                        "This plugin version was made for " + ProtocolVersion.values()[ProtocolVersion.values().length-1].getFriendlyName() +
-                        " - " + ProtocolVersion.values()[3].getFriendlyName() + ". Disabling."));
+                Bukkit.getConsoleSender().sendMessage(String.format(
+                        "%s[TAB] Your server version is not compatible. This plugin version was made for %s - %s. Disabling.",
+                        EnumChatFormat.RED.getFormat(), ProtocolVersion.V1_5.getFriendlyName(), ProtocolVersion.LATEST_KNOWN_VERSION.getFriendlyName()
+                ));
             } else {
-                Bukkit.getConsoleSender().sendMessage(EnumChatFormat.color("&c[TAB] A compatibility issue " +
-                        "with your server was found. Unless you are running some really weird server software, this is a bug."));
+                Bukkit.getConsoleSender().sendMessage(EnumChatFormat.RED.getFormat() + "[TAB] A compatibility issue " +
+                        "with your server was found. Unless you are running some really weird server software, this is a bug.");
             }
             return false;
         }

bukkit/src/main/java/me/neznamy/tab/platforms/bukkit/BukkitTabCommand.java

@@ -11,7 +11,7 @@ import org.bukkit.command.TabCompleter;
 import org.bukkit.entity.Player;
 import org.jetbrains.annotations.NotNull;
 
-import java.util.ArrayList;
+import java.util.Collections;
 import java.util.List;
 
 /**
@@ -20,7 +20,7 @@ import java.util.List;
 public class BukkitTabCommand implements CommandExecutor, TabCompleter {
 
     @Override
-    public boolean onCommand(@NotNull CommandSender sender, @NotNull Command command, @NotNull String label, String[] args) {
+    public boolean onCommand(@NotNull CommandSender sender, @NotNull Command command, @NotNull String label, @NotNull String[] args) {
         if (TAB.getInstance().isPluginDisabled()) {
             for (String message : TAB.getInstance().getDisabledCommand().execute(args, sender.hasPermission(TabConstants.Permission.COMMAND_RELOAD), sender.hasPermission(TabConstants.Permission.COMMAND_ALL))) {
                 sender.sendMessage(EnumChatFormat.color(message));
@@ -37,11 +37,12 @@ public class BukkitTabCommand implements CommandExecutor, TabCompleter {
     }
 
     @Override
-    public List<String> onTabComplete(@NotNull CommandSender sender, @NotNull Command command, @NotNull String alias, String[] args) {
+    @NotNull
+    public List<String> onTabComplete(@NotNull CommandSender sender, @NotNull Command command, @NotNull String alias, @NotNull String[] args) {
         TabPlayer p = null;
         if (sender instanceof Player) {
             p = TAB.getInstance().getPlayer(((Player)sender).getUniqueId());
-            if (p == null) return new ArrayList<>(); //player not loaded correctly
+            if (p == null) return Collections.emptyList(); //player not loaded correctly
         }
         return TAB.getInstance().getCommand().complete(p, args);
     }

bukkit/src/main/java/me/neznamy/tab/platforms/bukkit/BukkitTabList.java

@@ -4,11 +4,15 @@ import com.mojang.authlib.GameProfile;
 import com.mojang.authlib.properties.Property;
 import lombok.RequiredArgsConstructor;
 import lombok.SneakyThrows;
-import me.neznamy.tab.platforms.bukkit.nms.storage.nms.NMSStorage;
-import me.neznamy.tab.shared.ProtocolVersion;
+import me.neznamy.tab.platforms.bukkit.header.HeaderFooter;
+import me.neznamy.tab.platforms.bukkit.nms.BukkitReflection;
+import me.neznamy.tab.shared.chat.EnumChatFormat;
 import me.neznamy.tab.shared.chat.IChatBaseComponent;
 import me.neznamy.tab.shared.platform.TabList;
+import me.neznamy.tab.shared.platform.TabList.Entry.Builder;
+import me.neznamy.tab.shared.util.ComponentCache;
 import me.neznamy.tab.shared.util.ReflectionUtils;
+import org.bukkit.Bukkit;
 import org.jetbrains.annotations.NotNull;
 import org.jetbrains.annotations.Nullable;
 
@@ -32,170 +36,234 @@ import java.util.*;
 @SuppressWarnings({"unchecked", "rawtypes"})
 public class BukkitTabList implements TabList {
 
-    // NMS Fields
-    public static Class<?> PacketPlayOutPlayerListHeaderFooterClass;
-    public static Constructor<?> newPacketPlayOutPlayerListHeaderFooter;
-    public static Field HEADER;
-    public static Field FOOTER;
-
-    public static Class<?> PacketPlayOutPlayerInfoClass;
-    public static Constructor<?> newPacketPlayOutPlayerInfo;
+    public static Class<?> PlayerInfoClass;
+    private static Constructor<?> newPlayerInfo;
     public static Field ACTION;
     public static Field PLAYERS;
-    public static Class<Enum> EnumPlayerInfoActionClass;
-    public static Class<Enum> EnumGamemodeClass;
+    private static Class<Enum> ActionClass;
     public static Class<?> ClientboundPlayerInfoRemovePacket;
-    public static Class<?> RemoteChatSession$Data;
-    public static Constructor<?> newClientboundPlayerInfoRemovePacket;
+    private static Constructor<?> newClientboundPlayerInfoRemovePacket;
+    private static Class<?> EntityPlayer;
 
-    public static Class<?> PlayerInfoDataClass;
     public static Constructor<?> newPlayerInfoData;
-    public static Method PlayerInfoData_getProfile;
+    public static Field PlayerInfoData_UUID;
+    public static Field PlayerInfoData_Profile;
     public static Field PlayerInfoData_Latency;
     public static Field PlayerInfoData_GameMode;
     public static Field PlayerInfoData_DisplayName;
     public static Field PlayerInfoData_Listed;
     public static Field PlayerInfoData_RemoteChatSession;
 
+    private static Object[] gameModes;
+
+    @Nullable
+    private static SkinData skinData;
+
+    private static Method ChatSerializer_DESERIALIZE;
+    private static final ComponentCache<IChatBaseComponent, Object> componentCache = new ComponentCache<>(1000,
+            (component, clientVersion) -> ChatSerializer_DESERIALIZE.invoke(null, component.toString(clientVersion)));
+
     /** Player this TabList belongs to */
     private final BukkitTabPlayer player;
 
-    public static void load(NMSStorage nms) throws NoSuchMethodException {
-        if (nms.getMinorVersion() >= 17) {
-            newPacketPlayOutPlayerListHeaderFooter = PacketPlayOutPlayerListHeaderFooterClass.getConstructor(nms.IChatBaseComponent, nms.IChatBaseComponent);
-        } else {
-            newPacketPlayOutPlayerListHeaderFooter = PacketPlayOutPlayerListHeaderFooterClass.getConstructor();
-            HEADER = ReflectionUtils.getFields(PacketPlayOutPlayerListHeaderFooterClass, nms.IChatBaseComponent).get(0);
-            FOOTER = ReflectionUtils.getFields(PacketPlayOutPlayerListHeaderFooterClass, nms.IChatBaseComponent).get(1);
-        }
-        if (nms.is1_19_3Plus()) {
+    public static void load() throws NoSuchMethodException, ClassNotFoundException {
+        if (BukkitReflection.getMinorVersion() < 8) return; // Not supported
+
+        Class<?> ChatSerializer = BukkitReflection.getClass("network.chat.Component$Serializer",
+                "network.chat.IChatBaseComponent$ChatSerializer", "IChatBaseComponent$ChatSerializer", "ChatSerializer");
+        ChatSerializer_DESERIALIZE = ReflectionUtils.getMethods(ChatSerializer, Object.class, String.class).get(0);
+        Class<?> IChatBaseComponent = BukkitReflection.getClass("network.chat.Component", "network.chat.IChatBaseComponent", "IChatBaseComponent");
+        Class<Enum> EnumGamemodeClass = (Class<Enum>) BukkitReflection.getClass("world.level.GameType",
+                "world.level.EnumGamemode", "EnumGamemode", "WorldSettings$EnumGamemode");
+        EntityPlayer = BukkitReflection.getClass("server.level.ServerPlayer", "server.level.EntityPlayer", "EntityPlayer");
+        ActionClass = (Class<Enum>) BukkitReflection.getClass(
+                "network.protocol.game.ClientboundPlayerInfoUpdatePacket$Action", // Mojang 1.19.3+
+                "network.protocol.game.ClientboundPlayerInfoPacket$Action", // Mojang 1.17 - 1.19.2
+                "network.protocol.game.ClientboundPlayerInfoUpdatePacket$a", // Bukkit 1.19.3+
+                "network.protocol.game.PacketPlayOutPlayerInfo$EnumPlayerInfoAction", // Bukkit 1.17 - 1.19.2
+                "PacketPlayOutPlayerInfo$EnumPlayerInfoAction", // Bukkit 1.8.1 - 1.16.5
+                "EnumPlayerInfoAction" // Bukkit 1.8.0
+        );
+        PlayerInfoClass = BukkitReflection.getClass("network.protocol.game.ClientboundPlayerInfoUpdatePacket",
+                "network.protocol.game.ClientboundPlayerInfoPacket",
+                "network.protocol.game.PacketPlayOutPlayerInfo", "PacketPlayOutPlayerInfo");
+        Class<?> playerInfoDataClass = BukkitReflection.getClass(
+                "network.protocol.game.ClientboundPlayerInfoUpdatePacket$Entry", // Mojang 1.19.3
+                "network.protocol.game.ClientboundPlayerInfoPacket$PlayerUpdate", // Mojang 1.17 - 1.19.2
+                "network.protocol.game.ClientboundPlayerInfoUpdatePacket$b", // Bukkit 1.19.3+
+                "network.protocol.game.PacketPlayOutPlayerInfo$PlayerInfoData", // Bukkit 1.17 - 1.19.2
+                "PacketPlayOutPlayerInfo$PlayerInfoData", // Bukkit 1.8.1 - 1.16.5
+                "PlayerInfoData" // Bukkit 1.8.0
+        );
+
+        PLAYERS = ReflectionUtils.getOnlyField(PlayerInfoClass, List.class);
+        newPlayerInfoData = playerInfoDataClass.getConstructors()[0]; // #1105, a specific 1.8.8 fork has 2 constructors
+        PlayerInfoData_Profile = ReflectionUtils.getOnlyField(playerInfoDataClass, GameProfile.class);
+        PlayerInfoData_Latency = ReflectionUtils.getOnlyField(playerInfoDataClass, int.class);
+        PlayerInfoData_GameMode = ReflectionUtils.getOnlyField(playerInfoDataClass, EnumGamemodeClass);
+        PlayerInfoData_DisplayName = ReflectionUtils.getOnlyField(playerInfoDataClass, IChatBaseComponent);
+        if (BukkitReflection.is1_19_3Plus()) {
+            ClientboundPlayerInfoRemovePacket = BukkitReflection.getClass("network.protocol.game.ClientboundPlayerInfoRemovePacket");
+            Class<?> RemoteChatSession$Data = BukkitReflection.getClass("network.chat.RemoteChatSession$Data", "network.chat.RemoteChatSession$a");
             newClientboundPlayerInfoRemovePacket = ClientboundPlayerInfoRemovePacket.getConstructor(List.class);
-            newPacketPlayOutPlayerInfo = PacketPlayOutPlayerInfoClass.getConstructor(EnumSet.class, Collection.class);
-            ACTION = ReflectionUtils.getOnlyField(PacketPlayOutPlayerInfoClass, EnumSet.class);
+            newPlayerInfo = PlayerInfoClass.getConstructor(EnumSet.class, Collection.class);
+            ACTION = ReflectionUtils.getOnlyField(PlayerInfoClass, EnumSet.class);
+            PlayerInfoData_Listed = ReflectionUtils.getOnlyField(playerInfoDataClass, boolean.class);
+            PlayerInfoData_RemoteChatSession = ReflectionUtils.getOnlyField(playerInfoDataClass, RemoteChatSession$Data);
+            PlayerInfoData_UUID = ReflectionUtils.getOnlyField(playerInfoDataClass, UUID.class);
         } else {
-            newPacketPlayOutPlayerInfo = PacketPlayOutPlayerInfoClass.getConstructor(EnumPlayerInfoActionClass, Array.newInstance(nms.EntityPlayer, 0).getClass());
-            ACTION = ReflectionUtils.getOnlyField(PacketPlayOutPlayerInfoClass, EnumPlayerInfoActionClass);
+            newPlayerInfo = PlayerInfoClass.getConstructor(ActionClass, Array.newInstance(EntityPlayer, 0).getClass());
+            ACTION = ReflectionUtils.getOnlyField(PlayerInfoClass, ActionClass);
         }
-        PLAYERS = ReflectionUtils.getOnlyField(PacketPlayOutPlayerInfoClass, List.class);
-        newPlayerInfoData = ReflectionUtils.getOnlyConstructor(PlayerInfoDataClass);
-        PlayerInfoData_getProfile = ReflectionUtils.getOnlyMethod(PlayerInfoDataClass, GameProfile.class);
-        PlayerInfoData_Latency = ReflectionUtils.getOnlyField(PlayerInfoDataClass, int.class);
-        PlayerInfoData_GameMode = ReflectionUtils.getOnlyField(PlayerInfoDataClass, EnumGamemodeClass);
-        PlayerInfoData_DisplayName = ReflectionUtils.getOnlyField(PlayerInfoDataClass, nms.IChatBaseComponent);
-        if (nms.is1_19_3Plus()) {
-            PlayerInfoData_Listed = ReflectionUtils.getOnlyField(PlayerInfoDataClass, boolean.class);
-            PlayerInfoData_RemoteChatSession = ReflectionUtils.getOnlyField(PlayerInfoDataClass, RemoteChatSession$Data);
+        gameModes = new Object[] {
+                Enum.valueOf(EnumGamemodeClass, "SURVIVAL"),
+                Enum.valueOf(EnumGamemodeClass, "CREATIVE"),
+                Enum.valueOf(EnumGamemodeClass, "ADVENTURE"),
+                Enum.valueOf(EnumGamemodeClass, "SPECTATOR")
+        };
+
+        try {
+            skinData = new SkinData();
+        } catch (Exception e) {
+            Bukkit.getConsoleSender().sendMessage(EnumChatFormat.RED.getFormat() + "[TAB] Failed to initialize NMS fields for " +
+                    "getting player's game profile due to a compatibility error. This will " +
+                    "result in player skins not properly working in layout feature. " +
+                    "Please update the plugin a to version with native support for your server version for optimal experience.");
         }
     }
 
     @Override
     @SneakyThrows
     public void removeEntry(@NotNull UUID entry) {
+        if (PlayerInfoClass == null) return;
         if (ClientboundPlayerInfoRemovePacket != null) {
             //1.19.3+
             player.sendPacket(newClientboundPlayerInfoRemovePacket.newInstance(Collections.singletonList(entry)));
         } else {
             //1.19.2-
-            player.sendPacket(createPacket(Action.REMOVE_PLAYER, new Entry.Builder(entry).build(), player.getVersion()));
+            player.sendPacket(createPacket(Action.REMOVE_PLAYER, new Builder(entry).build()));
         }
     }
 
     @Override
     public void updateDisplayName(@NotNull UUID entry, @Nullable IChatBaseComponent displayName) {
-        player.sendPacket(createPacket(Action.UPDATE_DISPLAY_NAME,
-                new Entry.Builder(entry).displayName(displayName).build(), player.getVersion())
-        );
+        if (PlayerInfoClass == null) return;
+        player.sendPacket(createPacket(Action.UPDATE_DISPLAY_NAME, new Builder(entry).displayName(displayName).build()));
     }
 
     @Override
     public void updateLatency(@NotNull UUID entry, int latency) {
-        player.sendPacket(createPacket(Action.UPDATE_LATENCY,
-                new Entry.Builder(entry).latency(latency).build(), player.getVersion())
-        );
+        if (PlayerInfoClass == null) return;
+        player.sendPacket(createPacket(Action.UPDATE_LATENCY, new Builder(entry).latency(latency).build()));
     }
 
     @Override
     public void updateGameMode(@NotNull UUID entry, int gameMode) {
-        player.sendPacket(createPacket(Action.UPDATE_GAME_MODE,
-                new Entry.Builder(entry).gameMode(gameMode).build(), player.getVersion())
-        );
+        if (PlayerInfoClass == null) return;
+        player.sendPacket(createPacket(Action.UPDATE_GAME_MODE, new Builder(entry).gameMode(gameMode).build()));
     }
 
     @Override
     public void addEntry(@NotNull Entry entry) {
-        player.sendPacket(createPacket(Action.ADD_PLAYER, entry, player.getVersion()));
+        if (PlayerInfoClass == null) return;
+        player.sendPacket(createPacket(Action.ADD_PLAYER, entry));
     }
 
     @Override
     @SneakyThrows
     public void setPlayerListHeaderFooter(@NotNull IChatBaseComponent header, @NotNull IChatBaseComponent footer) {
-        if (PacketPlayOutPlayerListHeaderFooterClass == null) return;
-        NMSStorage nms = NMSStorage.getInstance();
-        Object packet;
-        if (nms.getMinorVersion() >= 17) {
-            packet = newPacketPlayOutPlayerListHeaderFooter.newInstance(
-                    nms.toNMSComponent(header, player.getVersion()), nms.toNMSComponent(footer, player.getVersion()));
-        } else {
-            packet = newPacketPlayOutPlayerListHeaderFooter.newInstance();
-            HEADER.set(packet, nms.toNMSComponent(header, player.getVersion()));
-            FOOTER.set(packet, nms.toNMSComponent(footer, player.getVersion()));
-        }
-        player.sendPacket(packet);
+        if (HeaderFooter.getInstance() != null) HeaderFooter.getInstance().set(player, header, footer);
     }
 
     @SneakyThrows
-    private Object createPacket(TabList.Action action, TabList.Entry entry, ProtocolVersion clientVersion) {
-        NMSStorage nms = NMSStorage.getInstance();
-        if (nms.getMinorVersion() < 8) return null;
+    @NotNull
+    private Object createPacket(@NotNull Action action, @NotNull Entry entry) {
         Object packet;
         List<Object> players = new ArrayList<>();
-        if (NMSStorage.getInstance().is1_19_3Plus()) {
+        if (BukkitReflection.is1_19_3Plus()) {
             EnumSet<?> actions;
-            if (action == TabList.Action.ADD_PLAYER) {
-                actions = EnumSet.allOf(EnumPlayerInfoActionClass);
+            if (action == Action.ADD_PLAYER) {
+                actions = EnumSet.allOf(ActionClass);
             } else {
-                actions = EnumSet.of(Enum.valueOf(EnumPlayerInfoActionClass, action.name()));
+                actions = EnumSet.of(Enum.valueOf(ActionClass, action.name()));
             }
-            packet = newPacketPlayOutPlayerInfo.newInstance(actions, Collections.emptyList());
-            GameProfile profile = new GameProfile(entry.getUniqueId(), entry.getName());
-            if (entry.getSkin() != null) profile.getProperties().put(TabList.TEXTURES_PROPERTY,
-                    new Property(TabList.TEXTURES_PROPERTY, entry.getSkin().getValue(), entry.getSkin().getSignature()));
+            packet = newPlayerInfo.newInstance(actions, Collections.emptyList());
             players.add(newPlayerInfoData.newInstance(
                     entry.getUniqueId(),
-                    profile,
+                    createProfile(entry.getUniqueId(), entry.getName(), entry.getSkin()),
                     true,
                     entry.getLatency(),
-                    int2GameMode(entry.getGameMode()),
-                    entry.getDisplayName() == null ? null : nms.toNMSComponent(entry.getDisplayName(), clientVersion),
+                    gameModes[entry.getGameMode()],
+                    entry.getDisplayName() == null ? null : toComponent(entry.getDisplayName()),
                     null
             ));
         } else {
-            packet = newPacketPlayOutPlayerInfo.newInstance(Enum.valueOf(EnumPlayerInfoActionClass, action.name()),
-                    Array.newInstance(NMSStorage.getInstance().EntityPlayer, 0));
-            GameProfile profile = new GameProfile(entry.getUniqueId(), entry.getName());
-            if (entry.getSkin() != null) profile.getProperties().put(TabList.TEXTURES_PROPERTY,
-                    new Property(TabList.TEXTURES_PROPERTY, entry.getSkin().getValue(), entry.getSkin().getSignature()));
+            packet = newPlayerInfo.newInstance(Enum.valueOf(ActionClass, action.name()), Array.newInstance(EntityPlayer, 0));
             List<Object> parameters = new ArrayList<>();
-            if (newPlayerInfoData.getParameterTypes()[0] == PacketPlayOutPlayerInfoClass) {
+            if (newPlayerInfoData.getParameterTypes()[0] == PlayerInfoClass) {
                 parameters.add(packet);
             }
-            parameters.add(profile);
+            parameters.add(createProfile(entry.getUniqueId(), entry.getName(), entry.getSkin()));
             parameters.add(entry.getLatency());
-            parameters.add(int2GameMode(entry.getGameMode()));
-            parameters.add(entry.getDisplayName() == null ? null : nms.toNMSComponent(entry.getDisplayName(), clientVersion));
-            if (nms.getMinorVersion() >= 19) parameters.add(null);
+            parameters.add(gameModes[entry.getGameMode()]);
+            parameters.add(entry.getDisplayName() == null ? null : toComponent(entry.getDisplayName()));
+            if (BukkitReflection.getMinorVersion() >= 19) parameters.add(null);
             players.add(newPlayerInfoData.newInstance(parameters.toArray()));
         }
         PLAYERS.set(packet, players);
         return packet;
     }
 
-    private Object int2GameMode(int gameMode) {
-        switch (gameMode) {
-            case 1: return Enum.valueOf(EnumGamemodeClass, "CREATIVE");
-            case 2: return Enum.valueOf(EnumGamemodeClass, "ADVENTURE");
-            case 3: return Enum.valueOf(EnumGamemodeClass, "SPECTATOR");
-            default: return Enum.valueOf(EnumGamemodeClass, "SURVIVAL");
+    public Object toComponent(IChatBaseComponent component) {
+        return componentCache.get(component, player.getVersion());
+    }
+
+    @NotNull
+    private GameProfile createProfile(@NotNull UUID id, @Nullable String name, @Nullable Skin skin) {
+        GameProfile profile = new GameProfile(id, name == null ? "" : name);
+        if (skin != null) {
+            profile.getProperties().put(TabList.TEXTURES_PROPERTY,
+                    new Property(TabList.TEXTURES_PROPERTY, skin.getValue(), skin.getSignature()));
+        }
+        return profile;
+    }
+
+    @Nullable
+    public Skin getSkin() {
+        if (skinData == null) return null;
+        return skinData.getSkin(player);
+    }
+
+    private static class SkinData {
+
+        private final Method getHandle;
+        private final Method getProfile;
+
+        @SneakyThrows
+        public SkinData() {
+            Class<?> EntityHuman = BukkitReflection.getClass("world.entity.player.Player", "world.entity.player.EntityHuman", "EntityHuman");
+            getHandle = Class.forName("org.bukkit.craftbukkit." + BukkitReflection.getServerPackage() + ".entity.CraftPlayer").getMethod("getHandle");
+            // There is only supposed to be one, however there are exceptions:
+            // #1 - CatServer adds another method
+            // #2 - Random mods may perform deep hack into the server and add another one (see #1089)
+            // Get first and hope for the best, alternatively players may not have correct skins in layout, but who cares
+            getProfile = ReflectionUtils.getMethods(EntityHuman, GameProfile.class).get(0);
+        }
+
+        @Nullable
+        @SneakyThrows
+        public Skin getSkin(@NotNull BukkitTabPlayer player) {
+            Collection<Property> col = ((GameProfile) getProfile.invoke(getHandle.invoke(player.getPlayer()))).getProperties().get(TEXTURES_PROPERTY);
+            if (col.isEmpty()) return null; //offline mode
+            Property property = col.iterator().next();
+            if (BukkitReflection.is1_20_2Plus()) {
+                return new Skin(
+                        (String) property.getClass().getMethod("value").invoke(property),
+                        (String) property.getClass().getMethod("signature").invoke(property)
+                );
+            } else {
+                return new Skin(property.getValue(), property.getSignature());
+            }
         }
     }
 }

bukkit/src/main/java/me/neznamy/tab/platforms/bukkit/BukkitTabPlayer.java

@@ -1,37 +1,31 @@
 package me.neznamy.tab.platforms.bukkit;
 
-import com.mojang.authlib.GameProfile;
-import com.mojang.authlib.properties.Property;
 import lombok.Getter;
 import lombok.SneakyThrows;
+import me.neznamy.tab.platforms.bukkit.hook.LibsDisguisesHook;
+import me.neznamy.tab.platforms.bukkit.nms.BukkitReflection;
+import me.neznamy.tab.platforms.bukkit.nms.PacketEntityView;
+import me.neznamy.tab.platforms.bukkit.nms.PacketSender;
+import me.neznamy.tab.platforms.bukkit.nms.PingRetriever;
 import me.neznamy.tab.platforms.bukkit.platform.BukkitPlatform;
-import me.neznamy.tab.platforms.bukkit.scoreboard.PacketScoreboard;
-import me.neznamy.tab.shared.chat.rgb.RGBUtils;
-import me.neznamy.tab.shared.hook.ViaVersionHook;
-import me.neznamy.tab.shared.platform.bossbar.BossBar;
+import me.neznamy.tab.platforms.bukkit.scoreboard.ScoreboardLoader;
+import me.neznamy.tab.shared.backend.entityview.EntityView;
+import me.neznamy.tab.shared.platform.BossBar;
 import me.neznamy.tab.shared.chat.IChatBaseComponent;
 import me.neznamy.tab.shared.platform.TabList;
 import me.neznamy.tab.platforms.bukkit.bossbar.EntityBossBar;
 import me.neznamy.tab.platforms.bukkit.bossbar.BukkitBossBar;
 import me.neznamy.tab.platforms.bukkit.bossbar.ViaBossBar;
-import me.neznamy.tab.platforms.bukkit.nms.datawatcher.DataWatcher;
-import me.neznamy.tab.platforms.bukkit.nms.storage.nms.NMSStorage;
-import me.neznamy.tab.platforms.bukkit.nms.storage.packet.*;
 import me.neznamy.tab.shared.platform.Scoreboard;
-import me.neznamy.tab.shared.TAB;
 import me.neznamy.tab.shared.backend.BackendTabPlayer;
-import me.neznamy.tab.shared.backend.EntityData;
-import me.neznamy.tab.shared.backend.Location;
-import org.bukkit.entity.Entity;
+import me.neznamy.tab.shared.util.ReflectionUtils;
+import net.md_5.bungee.chat.ComponentSerializer;
 import org.bukkit.entity.Player;
 import org.bukkit.metadata.MetadataValue;
 import org.bukkit.potion.PotionEffectType;
 import org.jetbrains.annotations.NotNull;
 import org.jetbrains.annotations.Nullable;
 
-import java.util.Collection;
-import java.util.UUID;
-
 /**
  * TabPlayer implementation for Bukkit platform
  */
@@ -39,29 +33,31 @@ import java.util.UUID;
 @Getter
 public class BukkitTabPlayer extends BackendTabPlayer {
 
-    /** Player's NMS handle (EntityPlayer), preloading for speed */
-    private final Object handle;
+    private static final boolean spigot = ReflectionUtils.classExists("org.bukkit.entity.Player$Spigot");
 
-    /** Player's connection for sending packets, preloading for speed */
-    private final Object playerConnection;
+    @NotNull
+    private final Scoreboard<BukkitTabPlayer> scoreboard = ScoreboardLoader.getInstance().apply(this);
 
-    private final Scoreboard<BukkitTabPlayer> scoreboard = new PacketScoreboard(this);
-    private final TabList tabList = new BukkitTabList(this);
-    private final BossBar bossBar = TAB.getInstance().getServerVersion().getMinorVersion() >= 9 ?
-            new BukkitBossBar(this) : getVersion().getMinorVersion() >= 9 ? new ViaBossBar(this) : new EntityBossBar(this);
+    @NotNull
+    private final BukkitTabList tabList = new BukkitTabList(this);
+
+    @NotNull
+    private final BossBar bossBar = BukkitReflection.getMinorVersion() >= 9 ? new BukkitBossBar(this) :
+            getVersion().getMinorVersion() >= 9 ? new ViaBossBar(this) : new EntityBossBar(this);
+
+    @NotNull
+    private final EntityView entityView = new PacketEntityView(this);
 
     /**
-     * Constructs new instance with given bukkit player and protocol version
+     * Constructs new instance with given bukkit player
      *
+     * @param   platform
+     *          Server platform
      * @param   p
      *          bukkit player
      */
-    @SneakyThrows
-    public BukkitTabPlayer(Player p) {
-        super(p, p.getUniqueId(), p.getName(), TAB.getInstance().getConfiguration().getServerName(),
-                p.getWorld().getName(), ViaVersionHook.getInstance().getPlayerVersion(p.getUniqueId(), p.getName()));
-        handle = NMSStorage.getInstance().getHandle.invoke(player);
-        playerConnection = NMSStorage.getInstance().PLAYER_CONNECTION.get(handle);
+    public BukkitTabPlayer(@NotNull BukkitPlatform platform, @NotNull Player p) {
+        super(platform, p, p.getUniqueId(), p.getName(), p.getWorld().getName());
     }
 
     @Override
@@ -70,27 +66,23 @@ public class BukkitTabPlayer extends BackendTabPlayer {
     }
 
     @Override
+    @SneakyThrows
     public int getPing() {
-        if (TAB.getInstance().getServerVersion().getMinorVersion() >= 17) {
-            return getPlayer().getPing();
-        }
-        try {
-            return NMSStorage.getInstance().PING.getInt(handle);
-        } catch (IllegalAccessException e) {
-            return -1;
-        }
+        return PingRetriever.getPing(getPlayer());
     }
 
     @SneakyThrows
-    public void sendPacket(@Nullable Object nmsPacket) {
-        if (nmsPacket == null || !getPlayer().isOnline()) return;
-        NMSStorage.getInstance().sendPacket.invoke(playerConnection, nmsPacket);
+    public void sendPacket(@NotNull Object nmsPacket) {
+        PacketSender.sendPacket(getPlayer(), nmsPacket);
     }
 
     @Override
     public void sendMessage(@NotNull IChatBaseComponent message) {
-        getPlayer().sendMessage(RGBUtils.getInstance().convertToBukkitFormat(message.toFlatText(),
-                getVersion().getMinorVersion() >= 16 && TAB.getInstance().getServerVersion().getMinorVersion() >= 16));
+        if (spigot) {
+            getPlayer().spigot().sendMessage(ComponentSerializer.parse(message.toString(getVersion())));
+        } else {
+            getPlayer().sendMessage(BukkitUtils.toBukkitFormat(message, getVersion().getMinorVersion() >= 16));
+        }
     }
 
     @Override
@@ -100,28 +92,18 @@ public class BukkitTabPlayer extends BackendTabPlayer {
 
     @Override
     public boolean isDisguised() {
-        try {
-            if (!((BukkitPlatform)TAB.getInstance().getPlatform()).isLibsDisguisesEnabled()) return false;
-            return (boolean) Class.forName("me.libraryaddict.disguise.DisguiseAPI").getMethod("isDisguised", Entity.class).invoke(null, getPlayer());
-        } catch (LinkageError | ReflectiveOperationException e) {
-            //java.lang.NoClassDefFoundError: Could not initialize class me.libraryaddict.disguise.DisguiseAPI
-            TAB.getInstance().getErrorManager().printError("Failed to check disguise status using LibsDisguises", e);
-            ((BukkitPlatform)TAB.getInstance().getPlatform()).setLibsDisguisesEnabled(false);
-            return false;
-        }
+        return LibsDisguisesHook.isDisguised(this);
     }
 
     @Override
-    @SneakyThrows
+    @Nullable
     public TabList.Skin getSkin() {
-        Collection<Property> col = ((GameProfile)NMSStorage.getInstance().getProfile.invoke(handle)).getProperties().get(TabList.TEXTURES_PROPERTY);
-        if (col.isEmpty()) return null; //offline mode
-        Property property = col.iterator().next();
-        return new TabList.Skin(property.getValue(), property.getSignature());
+        return tabList.getSkin();
     }
 
     @Override
-    public @NotNull Player getPlayer() {
+    @NotNull
+    public Player getPlayer() {
         return (Player) player;
     }
 
@@ -130,6 +112,11 @@ public class BukkitTabPlayer extends BackendTabPlayer {
         return getPlayer().isOnline();
     }
 
+    @Override
+    public BukkitPlatform getPlatform() {
+        return (BukkitPlatform) platform;
+    }
+
     @Override
     public boolean isVanished() {
         return getPlayer().getMetadata("vanished").stream().anyMatch(MetadataValue::asBoolean);
@@ -141,39 +128,13 @@ public class BukkitTabPlayer extends BackendTabPlayer {
     }
 
     @Override
-    public void spawnEntity(int entityId, @NotNull UUID id, @NotNull Object entityType, @NotNull Location location, @NotNull EntityData data) {
-        sendPacket(PacketPlayOutSpawnEntityLivingStorage.build(entityId, id, entityType, location, data));
-        if (TAB.getInstance().getServerVersion().getMinorVersion() >= 15) {
-            updateEntityMetadata(entityId, data);
-        }
+    public double getHealth() {
+        return getPlayer().getHealth();
     }
 
     @Override
-    @SneakyThrows
-    public void updateEntityMetadata(int entityId, @NotNull EntityData data) {
-        if (PacketPlayOutEntityMetadataStorage.CONSTRUCTOR.getParameterCount() == 2) {
-            //1.19.3+
-            sendPacket(PacketPlayOutEntityMetadataStorage.CONSTRUCTOR.newInstance(entityId, DataWatcher.packDirty.invoke(data.build())));
-        } else {
-            sendPacket(PacketPlayOutEntityMetadataStorage.CONSTRUCTOR.newInstance(entityId, data.build(), true));
-        }
-    }
-
-    @Override
-    public void teleportEntity(int entityId, @NotNull Location location) {
-        sendPacket(PacketPlayOutEntityTeleportStorage.build(entityId, location));
-    }
-
-    @Override
-    @SneakyThrows
-    public void destroyEntities(int... entities) {
-        if (PacketPlayOutEntityDestroyStorage.CONSTRUCTOR.getParameterTypes()[0] != int.class) {
-            sendPacket(PacketPlayOutEntityDestroyStorage.CONSTRUCTOR.newInstance(new Object[]{entities}));
-        } else {
-            //1.17.0 Mojank
-            for (int entity : entities) {
-                sendPacket(PacketPlayOutEntityDestroyStorage.CONSTRUCTOR.newInstance(entity));
-            }
-        }
+    @NotNull
+    public String getDisplayName() {
+        return getPlayer().getDisplayName();
     }
 }

bukkit/src/main/java/me/neznamy/tab/platforms/bukkit/BukkitUtils.java

@@ -0,0 +1,72 @@
+package me.neznamy.tab.platforms.bukkit;
+
+import lombok.AccessLevel;
+import lombok.NoArgsConstructor;
+import lombok.SneakyThrows;
+import me.neznamy.tab.platforms.bukkit.nms.BukkitReflection;
+import me.neznamy.tab.shared.chat.EnumChatFormat;
+import me.neznamy.tab.shared.chat.IChatBaseComponent;
+import org.bukkit.Bukkit;
+import org.bukkit.entity.Player;
+import org.jetbrains.annotations.NotNull;
+
+import java.util.Collection;
+
+/**
+ * Class containing static util methods used on Bukkit.
+ */
+@NoArgsConstructor(access = AccessLevel.PRIVATE)
+public class BukkitUtils {
+
+    /**
+     * Returns online players from Bukkit API. This requires reflection, as return type changed in 1.8,
+     * and we want to avoid errors.
+     *
+     * @return  Online players from Bukkit API.
+     */
+    @SuppressWarnings("unchecked")
+    @SneakyThrows
+    @NotNull
+    public static Player[] getOnlinePlayers() {
+        Object players = Bukkit.class.getMethod("getOnlinePlayers").invoke(null);
+        if (players instanceof Player[]) {
+            //1.7-
+            return (Player[]) players;
+        } else {
+            //1.8+
+            return ((Collection<Player>)players).toArray(new Player[0]);
+        }
+    }
+
+    /**
+     * Converts component to legacy string using bukkit RGB format if supported by both server and client.
+     * If not, closest legacy color is used instead.
+     *
+     * @param   component
+     *          Component to convert
+     * @param   rgbClient
+     *          Whether client accepts RGB colors or not.
+     * @return  Converted string using bukkit color format
+     */
+    @NotNull
+    public static String toBukkitFormat(@NotNull IChatBaseComponent component, boolean rgbClient) {
+        StringBuilder sb = new StringBuilder();
+        if (component.getModifier().getColor() != null) {
+            if (BukkitReflection.getMinorVersion() >= 16 && rgbClient) {
+                String hexCode = component.getModifier().getColor().getHexCode();
+                char c = EnumChatFormat.COLOR_CHAR;
+                sb.append(c).append("x").append(c).append(hexCode.charAt(0)).append(c).append(hexCode.charAt(1))
+                        .append(c).append(hexCode.charAt(2)).append(c).append(hexCode.charAt(3))
+                        .append(c).append(hexCode.charAt(4)).append(c).append(hexCode.charAt(5));
+            } else {
+                sb.append(component.getModifier().getColor().getLegacyColor().getFormat());
+            }
+        }
+        sb.append(component.getModifier().getMagicCodes());
+        if (component.getText() != null) sb.append(component.getText());
+        for (IChatBaseComponent extra : component.getExtra()) {
+            sb.append(toBukkitFormat(extra, rgbClient));
+        }
+        return sb.toString();
+    }
+}

bukkit/src/main/java/me/neznamy/tab/platforms/bukkit/bossbar/BukkitBossBar.java

@@ -3,10 +3,10 @@ package me.neznamy.tab.platforms.bukkit.bossbar;
 import lombok.RequiredArgsConstructor;
 import me.neznamy.tab.api.bossbar.BarColor;
 import me.neznamy.tab.api.bossbar.BarStyle;
-import me.neznamy.tab.shared.platform.bossbar.BossBar;
-import me.neznamy.tab.shared.chat.rgb.RGBUtils;
+import me.neznamy.tab.platforms.bukkit.BukkitUtils;
+import me.neznamy.tab.shared.chat.IChatBaseComponent;
+import me.neznamy.tab.shared.platform.BossBar;
 import me.neznamy.tab.platforms.bukkit.BukkitTabPlayer;
-import me.neznamy.tab.shared.TAB;
 import org.bukkit.Bukkit;
 import org.jetbrains.annotations.NotNull;
 
@@ -21,20 +21,25 @@ import java.util.UUID;
 @RequiredArgsConstructor
 public class BukkitBossBar implements BossBar {
 
+    /** Style array for fast access */
+    private static final org.bukkit.boss.BarStyle[] styles = org.bukkit.boss.BarStyle.values();
+    
     /** Player this handler belongs to */
+    @NotNull
     private final BukkitTabPlayer player;
 
     /** Bukkit BossBars the player can currently see */
+    @NotNull
     private final Map<UUID, org.bukkit.boss.BossBar> bossBars = new HashMap<>();
 
     @Override
     public void create(@NotNull UUID id, @NotNull String title, float progress, @NotNull BarColor color, @NotNull BarStyle style) {
         if (bossBars.containsKey(id)) return;
         org.bukkit.boss.BossBar bar = Bukkit.createBossBar(
-                RGBUtils.getInstance().convertToBukkitFormat(title,
-                        player.getVersion().getMinorVersion() >= 16 && TAB.getInstance().getServerVersion().getMinorVersion() >= 16),
+                BukkitUtils.toBukkitFormat(IChatBaseComponent.optimizedComponent(title), player.getVersion().getMinorVersion() >= 16),
                 org.bukkit.boss.BarColor.valueOf(color.name()),
-                org.bukkit.boss.BarStyle.valueOf(style.getBukkitName()));
+                styles[style.ordinal()]
+        );
         bar.setProgress(progress);
         bar.addPlayer(player.getPlayer());
         bossBars.put(id, bar);
@@ -42,8 +47,7 @@ public class BukkitBossBar implements BossBar {
 
     @Override
     public void update(@NotNull UUID id, @NotNull String title) {
-        bossBars.get(id).setTitle(RGBUtils.getInstance().convertToBukkitFormat(title,
-                player.getVersion().getMinorVersion() >= 16 && TAB.getInstance().getServerVersion().getMinorVersion() >= 16));
+        bossBars.get(id).setTitle(BukkitUtils.toBukkitFormat(IChatBaseComponent.optimizedComponent(title), player.getVersion().getMinorVersion() >= 16));
     }
 
     @Override
@@ -53,7 +57,7 @@ public class BukkitBossBar implements BossBar {
 
     @Override
     public void update(@NotNull UUID id, @NotNull BarStyle style) {
-        bossBars.get(id).setStyle(org.bukkit.boss.BarStyle.valueOf(style.getBukkitName()));
+        bossBars.get(id).setStyle(styles[style.ordinal()]);
     }
 
     @Override

bukkit/src/main/java/me/neznamy/tab/platforms/bukkit/bossbar/EntityBossBar.java

@@ -1,11 +1,11 @@
 package me.neznamy.tab.platforms.bukkit.bossbar;
 
 import lombok.RequiredArgsConstructor;
-import me.neznamy.tab.shared.platform.bossbar.BossBar;
+import me.neznamy.tab.shared.platform.BossBar;
 import me.neznamy.tab.api.bossbar.BarColor;
 import me.neznamy.tab.api.bossbar.BarStyle;
 import me.neznamy.tab.platforms.bukkit.BukkitTabPlayer;
-import me.neznamy.tab.platforms.bukkit.nms.datawatcher.DataWatcher;
+import me.neznamy.tab.platforms.bukkit.nms.DataWatcher;
 import me.neznamy.tab.shared.backend.Location;
 import org.bukkit.entity.EntityType;
 import org.jetbrains.annotations.NotNull;
@@ -21,6 +21,7 @@ import java.util.UUID;
 public class EntityBossBar implements BossBar {
 
     /** Player this handler belongs to */
+    @NotNull
     private final BukkitTabPlayer player;
 
     @Override
@@ -28,18 +29,18 @@ public class EntityBossBar implements BossBar {
         DataWatcher w = new DataWatcher();
         float health = 300*progress;
         if (health == 0) health = 1;
-        w.getHelper().setHealth(health);
-        w.getHelper().setCustomName(title, player.getVersion());
-        w.getHelper().setEntityFlags((byte) 32);
-        w.getHelper().setWitherInvulnerableTime(880); // Magic number
-        player.spawnEntity(id.hashCode(), new UUID(0, 0), EntityType.WITHER, new Location(0, 0, 0, 0, 0), w);
+        w.setHealth(health);
+        w.setCustomName(title, player.getVersion());
+        w.setEntityFlags((byte) 32);
+        w.setWitherInvulnerableTime(880); // Magic number
+        player.getEntityView().spawnEntity(id.hashCode(), new UUID(0, 0), EntityType.WITHER, new Location(0, 0, 0), w);
     }
 
     @Override
     public void update(@NotNull UUID id, @NotNull String title) {
         DataWatcher w = new DataWatcher();
-        w.getHelper().setCustomName(title, player.getVersion());
-        player.updateEntityMetadata(id.hashCode(), w);
+        w.setCustomName(title, player.getVersion());
+        player.getEntityView().updateEntityMetadata(id.hashCode(), w);
     }
 
     @Override
@@ -47,8 +48,8 @@ public class EntityBossBar implements BossBar {
         DataWatcher w = new DataWatcher();
         float health = 300*progress;
         if (health == 0) health = 1;
-        w.getHelper().setHealth(health);
-        player.updateEntityMetadata(id.hashCode(), w);
+        w.setHealth(health);
+        player.getEntityView().updateEntityMetadata(id.hashCode(), w);
     }
 
     @Override
@@ -59,6 +60,6 @@ public class EntityBossBar implements BossBar {
 
     @Override
     public void remove(@NotNull UUID id) {
-        player.destroyEntities(id.hashCode());
+        player.getEntityView().destroyEntities(id.hashCode());
     }
 }

bukkit/src/main/java/me/neznamy/tab/platforms/bukkit/bossbar/ViaBossBar.java

@@ -4,10 +4,10 @@ import com.viaversion.viaversion.api.Via;
 import com.viaversion.viaversion.api.legacy.bossbar.BossColor;
 import com.viaversion.viaversion.api.legacy.bossbar.BossStyle;
 import lombok.RequiredArgsConstructor;
-import me.neznamy.tab.shared.platform.bossbar.BossBar;
+import me.neznamy.tab.shared.chat.IChatBaseComponent;
+import me.neznamy.tab.shared.platform.BossBar;
 import me.neznamy.tab.api.bossbar.BarColor;
 import me.neznamy.tab.api.bossbar.BarStyle;
-import me.neznamy.tab.shared.chat.rgb.RGBUtils;
 import me.neznamy.tab.platforms.bukkit.BukkitTabPlayer;
 import org.jetbrains.annotations.NotNull;
 
@@ -21,28 +21,33 @@ import java.util.UUID;
 @RequiredArgsConstructor
 public class ViaBossBar implements BossBar {
 
+    /** Style array for fast access */
+    private static final BossStyle[] styles = BossStyle.values();
+    
     /** Player this handler belongs to */
+    @NotNull
     private final BukkitTabPlayer player;
 
     /** ViaVersion BossBars this 1.9+ player can see on 1.8 server */
+    @NotNull
     private final Map<UUID, com.viaversion.viaversion.api.legacy.bossbar.BossBar> viaBossBars = new HashMap<>();
 
     @Override
     public void create(@NotNull UUID id, @NotNull String title, float progress, @NotNull BarColor color, @NotNull BarStyle style) {
         if (viaBossBars.containsKey(id)) return;
         com.viaversion.viaversion.api.legacy.bossbar.BossBar bar = Via.getAPI().legacyAPI().createLegacyBossBar(
-                RGBUtils.getInstance().convertToBukkitFormat(title, player.getVersion().getMinorVersion() >= 16),
+                IChatBaseComponent.optimizedComponent(title).toString(player.getVersion()),
                 progress,
                 BossColor.valueOf(color.name()),
-                BossStyle.valueOf(style.getBukkitName()));
+                styles[style.ordinal()]
+        );
         viaBossBars.put(id, bar);
         bar.addPlayer(player.getPlayer().getUniqueId());
     }
 
     @Override
     public void update(@NotNull UUID id, @NotNull String title) {
-        viaBossBars.get(id).setTitle(RGBUtils.getInstance().convertToBukkitFormat(title,
-                player.getVersion().getMinorVersion() >= 16));
+        viaBossBars.get(id).setTitle(IChatBaseComponent.optimizedComponent(title).toString(player.getVersion()));
     }
 
     @Override
@@ -52,7 +57,7 @@ public class ViaBossBar implements BossBar {
 
     @Override
     public void update(@NotNull UUID id, @NotNull BarStyle style) {
-        viaBossBars.get(id).setStyle(BossStyle.valueOf(style.getBukkitName()));
+        viaBossBars.get(id).setStyle(styles[style.ordinal()]);
     }
 
     @Override

bukkit/src/main/java/me/neznamy/tab/platforms/bukkit/features/BukkitNameTagX.java

@@ -1,18 +1,13 @@
 package me.neznamy.tab.platforms.bukkit.features;
 
-import lombok.SneakyThrows;
+import me.neznamy.tab.platforms.bukkit.BukkitTabPlayer;
+import me.neznamy.tab.platforms.bukkit.nms.BukkitReflection;
+import me.neznamy.tab.platforms.bukkit.nms.DataWatcher;
 import me.neznamy.tab.platforms.bukkit.platform.BukkitPlatform;
 import me.neznamy.tab.shared.TAB;
-import me.neznamy.tab.shared.TabConstants;
-import me.neznamy.tab.shared.platform.TabPlayer;
-import me.neznamy.tab.shared.features.types.PacketSendListener;
-import me.neznamy.tab.platforms.bukkit.nms.datawatcher.DataWatcher;
-import me.neznamy.tab.platforms.bukkit.nms.storage.nms.NMSStorage;
-import me.neznamy.tab.platforms.bukkit.nms.storage.packet.PacketPlayOutEntityDestroyStorage;
-import me.neznamy.tab.platforms.bukkit.nms.storage.packet.PacketPlayOutEntityTeleportStorage;
-import me.neznamy.tab.shared.backend.BackendTabPlayer;
 import me.neznamy.tab.shared.backend.EntityData;
 import me.neznamy.tab.shared.backend.features.unlimitedtags.BackendNameTagX;
+import me.neznamy.tab.shared.platform.TabPlayer;
 import org.bukkit.Bukkit;
 import org.bukkit.Location;
 import org.bukkit.entity.Entity;
@@ -36,10 +31,7 @@ import java.util.stream.Collectors;
 /**
  * The core class for unlimited NameTag mode on Bukkit
  */
-public class BukkitNameTagX extends BackendNameTagX implements Listener, PacketSendListener {
-
-    /** Reference to NMS storage for quick access */
-    private final NMSStorage nms = NMSStorage.getInstance();
+public class BukkitNameTagX extends BackendNameTagX implements Listener {
 
     public BukkitNameTagX(@NotNull JavaPlugin plugin) {
         Bukkit.getPluginManager().registerEvents(this, plugin);
@@ -47,45 +39,12 @@ public class BukkitNameTagX extends BackendNameTagX implements Listener, PacketS
 
     @EventHandler(priority = EventPriority.MONITOR, ignoreCancelled = true)
     public void onSneak(PlayerToggleSneakEvent e) {
-        TabPlayer p = TAB.getInstance().getPlayer(e.getPlayer().getUniqueId());
-        if (p == null || isPlayerDisabled(p)) return;
-        TAB.getInstance().getCPUManager().runMeasuredTask(featureName, TabConstants.CpuUsageCategory.PLAYER_SNEAK,
-                () -> getArmorStandManager(p).sneak(e.isSneaking()));
+        sneak(e.getPlayer().getUniqueId(), e.isSneaking());
     }
 
-    @EventHandler
+    @EventHandler(priority = EventPriority.MONITOR, ignoreCancelled = true)
     public void onRespawn(PlayerRespawnEvent e) {
-        TabPlayer respawned = TAB.getInstance().getPlayer(e.getPlayer().getUniqueId());
-        if (respawned == null || isPlayerDisabled(respawned)) return;
-        TAB.getInstance().getCPUManager().runMeasuredTask(featureName, TabConstants.CpuUsageCategory.PLAYER_RESPAWN,
-                () -> getArmorStandManager(respawned).teleport());
-    }
-
-    @SuppressWarnings("unchecked")
-    @Override
-    @SneakyThrows
-    public void onPacketSend(@NotNull TabPlayer receiver, @NotNull Object packet) {
-        if (receiver.getVersion().getMinorVersion() < 8) return;
-        if (!receiver.isLoaded() || getDisableChecker().isDisabledPlayer(receiver) || getUnlimitedDisableChecker().isDisabledPlayer(receiver)) return;
-        if (nms.PacketPlayOutEntity.isInstance(packet) && !nms.PacketPlayOutEntityLook.isInstance(packet)) { //ignoring head rotation only packets
-            packetListener.onEntityMove((BackendTabPlayer) receiver, nms.PacketPlayOutEntity_ENTITYID.getInt(packet));
-        } else if (PacketPlayOutEntityTeleportStorage.CLASS.isInstance(packet)) {
-            packetListener.onEntityMove((BackendTabPlayer) receiver, PacketPlayOutEntityTeleportStorage.ENTITY_ID.getInt(packet));
-        } else if (nms.PacketPlayOutNamedEntitySpawn.isInstance(packet)) {
-            packetListener.onEntitySpawn((BackendTabPlayer) receiver, nms.PacketPlayOutNamedEntitySpawn_ENTITYID.getInt(packet));
-        } else if (PacketPlayOutEntityDestroyStorage.CLASS.isInstance(packet)) {
-            if (nms.getMinorVersion() >= 17) {
-                Object entities = PacketPlayOutEntityDestroyStorage.ENTITIES.get(packet);
-                if (entities instanceof List) {
-                    packetListener.onEntityDestroy((BackendTabPlayer) receiver, (List<Integer>) entities);
-                } else {
-                    //1.17.0
-                    packetListener.onEntityDestroy((BackendTabPlayer) receiver, (int) entities);
-                }
-            } else {
-                packetListener.onEntityDestroy((BackendTabPlayer) receiver, (int[]) PacketPlayOutEntityDestroyStorage.ENTITIES.get(packet));
-            }
-        }
+        respawn(e.getPlayer().getUniqueId());
     }
 
     @Override
@@ -112,9 +71,10 @@ public class BukkitNameTagX extends BackendNameTagX implements Listener, PacketS
 
     @SuppressWarnings("deprecation")
     @Override
-    public @NotNull List<Integer> getPassengers(@NotNull Object entity) {
+    @NotNull
+    public List<Integer> getPassengers(@NotNull Object entity) {
         Entity vehicle = (Entity) entity;
-        if (TAB.getInstance().getServerVersion().getMinorVersion() >= 11) {
+        if (BukkitReflection.getMinorVersion() >= 11) {
             return vehicle.getPassengers().stream().map(Entity::getEntityId).collect(Collectors.toList());
         } else {
             if (vehicle.getPassenger() != null) {
@@ -126,7 +86,8 @@ public class BukkitNameTagX extends BackendNameTagX implements Listener, PacketS
     }
 
     @Override
-    public @Nullable Object getVehicle(@NotNull TabPlayer player) {
+    @Nullable
+    public Object getVehicle(@NotNull TabPlayer player) {
         return ((Player)player.getPlayer()).getVehicle();
     }
 
@@ -136,7 +97,8 @@ public class BukkitNameTagX extends BackendNameTagX implements Listener, PacketS
     }
 
     @Override
-    public @NotNull String getEntityType(@NotNull Object entity) {
+    @NotNull
+    public String getEntityType(@NotNull Object entity) {
         return ((Entity) entity).getType().toString().toLowerCase();
     }
 
@@ -148,13 +110,13 @@ public class BukkitNameTagX extends BackendNameTagX implements Listener, PacketS
     @Override
     public boolean isSwimming(@NotNull TabPlayer player) {
         Player p = (Player) player.getPlayer();
-        if (TAB.getInstance().getServerVersion().getMinorVersion() >= 14 && p.getPose() == Pose.SWIMMING) return true;
-        return TAB.getInstance().getServerVersion().getMinorVersion() == 13 && p.isSwimming();
+        if (BukkitReflection.getMinorVersion() >= 14 && p.getPose() == Pose.SWIMMING) return true;
+        return BukkitReflection.getMinorVersion() == 13 && p.isSwimming();
     }
 
     @Override
     public boolean isGliding(@NotNull TabPlayer player) {
-        return TAB.getInstance().getServerVersion().getMinorVersion() >= 9 && ((Player)player.getPlayer()).isGliding();
+        return BukkitReflection.getMinorVersion() >= 9 && ((Player)player.getPlayer()).isGliding();
     }
 
     @Override
@@ -163,7 +125,8 @@ public class BukkitNameTagX extends BackendNameTagX implements Listener, PacketS
     }
 
     @Override
-    public @NotNull Object getArmorStandType() {
+    @NotNull
+    public Object getArmorStandType() {
         return EntityType.ARMOR_STAND;
     }
 
@@ -183,17 +146,23 @@ public class BukkitNameTagX extends BackendNameTagX implements Listener, PacketS
     }
 
     @Override
+    @NotNull
     public EntityData createDataWatcher(@NotNull TabPlayer viewer, byte flags, @NotNull String displayName, boolean nameVisible) {
         DataWatcher datawatcher = new DataWatcher();
-        datawatcher.getHelper().setEntityFlags(flags);
-        datawatcher.getHelper().setCustomName(displayName, viewer.getVersion());
-        datawatcher.getHelper().setCustomNameVisible(nameVisible);
-        datawatcher.getHelper().setArmorStandFlags((byte)16);
+        datawatcher.setEntityFlags(flags);
+        datawatcher.setCustomName(displayName, viewer.getVersion());
+        datawatcher.setCustomNameVisible(nameVisible);
+        datawatcher.setArmorStandFlags((byte)16);
         return datawatcher;
     }
 
     @Override
-    public void runInEntityScheduler(Object entity, Runnable task) {
+    public void runInEntityScheduler(@NotNull Object entity, @NotNull Runnable task) {
         ((BukkitPlatform)TAB.getInstance().getPlatform()).runEntityTask((Entity) entity, task);
     }
+
+    @Override
+    public boolean isDead(@NotNull TabPlayer player) {
+        return ((BukkitTabPlayer)player).getPlayer().isDead();
+    }
 }

bukkit/src/main/java/me/neznamy/tab/platforms/bukkit/features/BukkitTabExpansion.java

@@ -7,11 +7,14 @@ import me.neznamy.tab.shared.TabConstants;
 import me.neznamy.tab.shared.TAB;
 import me.neznamy.tab.shared.platform.TabPlayer;
 import me.neznamy.tab.shared.placeholders.expansion.TabExpansion;
+import me.neznamy.tab.shared.util.ReflectionUtils;
 import org.bukkit.entity.Player;
 import org.jetbrains.annotations.NotNull;
 import org.jetbrains.annotations.Nullable;
 
+import java.util.Arrays;
 import java.util.HashMap;
+import java.util.List;
 import java.util.Map;
 import java.util.WeakHashMap;
 
@@ -22,11 +25,36 @@ import java.util.WeakHashMap;
 public class BukkitTabExpansion extends PlaceholderExpansion implements TabExpansion {
 
     /** Map holding all values for all players for easy and high-performance access */
-    private final WeakHashMap<Player, Map<String, String>> values = new WeakHashMap<>();
+    @NotNull
+    private final WeakHashMap<TabPlayer, Map<String, String>> values = new WeakHashMap<>();
 
-    private final String author = TabConstants.PLUGIN_AUTHOR;
-    private final String identifier = TabConstants.PLUGIN_ID;
-    private final String version = TabConstants.PLUGIN_VERSION;
+    /** List of all placeholders offered by the plugin for command suggestions */
+    @NotNull
+    private final List<String> placeholders = Arrays.asList(
+            "%tab_tabprefix%",
+            "%tab_tabsuffix%",
+            "%tab_tagprefix%",
+            "%tab_tagsuffix%",
+            "%tab_customtabname%",
+            "%tab_customtagname%",
+            "%tab_belowname%",
+            "%tab_abovename%",
+            "%tab_tabprefix_raw%",
+            "%tab_tabsuffix_raw%",
+            "%tab_tagprefix_raw%",
+            "%tab_tagsuffix_raw%",
+            "%tab_customtabname_raw%",
+            "%tab_customtagname_raw%",
+            "%tab_belowname_raw%",
+            "%tab_abovename_raw%",
+            "%tab_scoreboard_name%",
+            "%tab_scoreboard_visible%",
+            "%tab_bossbar_visible%",
+            "%tab_nametag_preview%",
+            "%tab_nametag_visibility%",
+            "%tab_replace_<placeholder>%",
+            "%tab_placeholder_<placeholder>%"
+    );
 
     @Override
     public boolean persist() {
@@ -34,6 +62,31 @@ public class BukkitTabExpansion extends PlaceholderExpansion implements TabExpan
     }
 
     @Override
+    @NotNull
+    public String getAuthor() {
+        return TabConstants.PLUGIN_AUTHOR;
+    }
+
+    @Override
+    @NotNull
+    public String getIdentifier() {
+        return TabConstants.PLUGIN_ID;
+    }
+
+    @Override
+    @NotNull
+    public String getVersion() {
+        return TabConstants.PLUGIN_VERSION;
+    }
+
+    @Override
+    @NotNull
+    public List<String> getPlaceholders() {
+        return placeholders;
+    }
+
+    @Override
+    @Nullable
     public String onPlaceholderRequest(@Nullable Player player, @NotNull String identifier) {
         if (identifier.startsWith("replace_")) {
             String text = "%" + identifier.substring(8) + "%";
@@ -50,11 +103,25 @@ public class BukkitTabExpansion extends PlaceholderExpansion implements TabExpan
         if (identifier.startsWith("placeholder_")) {
             TAB.getInstance().getPlaceholderManager().addUsedPlaceholder("%" + identifier.substring(12) + "%", TAB.getInstance().getPlaceholderManager());
         }
-        return values.get(player).get(identifier);
+        if (player == null) return "<Player cannot be null>";
+        TabPlayer p = TAB.getInstance().getPlayer(player.getUniqueId());
+        if (p == null || !p.isLoaded()) return "<Player is not loaded>";
+        return values.get(p).get(identifier);
     }
 
     @Override
     public void setValue(@NotNull TabPlayer player, @NotNull String key, @NotNull String value) {
-        values.computeIfAbsent((Player) player.getPlayer(), p -> new HashMap<>()).put(key, value);
+        values.computeIfAbsent(player, p -> new HashMap<>()).put(key, value);
+    }
+
+    @Override
+    @SuppressWarnings({"UnstableApiUsage", "deprecation"})
+    public void unregisterExpansion() {
+        if (ReflectionUtils.methodExists(PlaceholderExpansion.class, "unregister")) {
+            // Added in 2.10.7 (Jul 28, 2020)
+            unregister();
+        } else {
+            PlaceholderAPI.unregisterExpansion(this);
+        }
     }
 }

bukkit/src/main/java/me/neznamy/tab/platforms/bukkit/features/PerWorldPlayerList.java

@@ -6,7 +6,7 @@ import java.util.Map;
 import java.util.Map.Entry;
 
 import lombok.Getter;
-import lombok.RequiredArgsConstructor;
+import me.neznamy.tab.platforms.bukkit.BukkitUtils;
 import me.neznamy.tab.shared.features.types.Loadable;
 import me.neznamy.tab.shared.features.types.UnLoadable;
 import org.bukkit.Bukkit;
@@ -27,29 +27,36 @@ import org.jetbrains.annotations.NotNull;
  * Per-world-PlayerList feature handler
  */
 @SuppressWarnings("deprecation")
-@RequiredArgsConstructor
 public class PerWorldPlayerList extends TabFeature implements Listener, Loadable, UnLoadable {
 
+    @Getter private final String featureName = "Per world PlayerList";
+
     /** Config options */
     private final boolean allowBypass = TAB.getInstance().getConfig().getBoolean("per-world-playerlist.allow-bypass-permission", false);
     private final List<String> ignoredWorlds = TAB.getInstance().getConfig().getStringList("per-world-playerlist.ignore-effect-in-worlds", Arrays.asList("ignored_world", "build"));
     private final Map<String, List<String>> sharedWorlds = TAB.getInstance().getConfig().getConfigurationSection("per-world-playerlist.shared-playerlist-world-groups");
 
-    /** Plugin reference*/
-    @NotNull private final JavaPlugin plugin;
-
-    @Getter private final String featureName = "Per world PlayerList";
-
-    @Override
-    public void load() {
-        Bukkit.getOnlinePlayers().forEach(this::checkPlayer);
+    /**
+     * Constructs new instance and registers events
+     *
+     * @param   plugin
+     *          Plugin instance to register events
+     */
+    public PerWorldPlayerList(JavaPlugin plugin) {
         Bukkit.getPluginManager().registerEvents(this, plugin);
     }
 
+    @Override
+    public void load() {
+        for (Player p : BukkitUtils.getOnlinePlayers()) {
+            checkPlayer(p);
+        }
+    }
+
     @Override
     public void unload() {
-        for (Player p : Bukkit.getOnlinePlayers()) {
-            for (Player pl : Bukkit.getOnlinePlayers()) {
+        for (Player p : BukkitUtils.getOnlinePlayers()) {
+            for (Player pl : BukkitUtils.getOnlinePlayers()) {
                 p.showPlayer(pl);
             }
         }
@@ -60,14 +67,14 @@ public class PerWorldPlayerList extends TabFeature implements Listener, Loadable
     public void onJoin(PlayerJoinEvent e) {
         long time = System.nanoTime();
         checkPlayer(e.getPlayer());
-        TAB.getInstance().getCPUManager().addTime(featureName, TabConstants.CpuUsageCategory.PLAYER_JOIN, System.nanoTime()-time);
+        TAB.getInstance().getCPUManager().addTime(this, TabConstants.CpuUsageCategory.PLAYER_JOIN, System.nanoTime()-time);
     }
 
     @EventHandler
     public void onWorldChange(PlayerChangedWorldEvent e) {
         long time = System.nanoTime();
         checkPlayer(e.getPlayer());
-        TAB.getInstance().getCPUManager().addTime(featureName, TabConstants.CpuUsageCategory.WORLD_SWITCH, System.nanoTime()-time);
+        TAB.getInstance().getCPUManager().addTime(this, TabConstants.CpuUsageCategory.WORLD_SWITCH, System.nanoTime()-time);
     }
 
     /**
@@ -79,7 +86,7 @@ public class PerWorldPlayerList extends TabFeature implements Listener, Loadable
      *          Player to update
      */
     private void checkPlayer(@NotNull Player p) {
-        for (Player all : Bukkit.getOnlinePlayers()) {
+        for (Player all : BukkitUtils.getOnlinePlayers()) {
             if (all == p) continue;
             if (!shouldSee(p, all) && p.canSee(all)) p.hidePlayer(all);
             if (shouldSee(p, all) && !p.canSee(all)) p.showPlayer(all);

bukkit/src/main/java/me/neznamy/tab/platforms/bukkit/features/WitherBossBar.java

@@ -1,6 +1,7 @@
 package me.neznamy.tab.platforms.bukkit.features;
 
 import lombok.RequiredArgsConstructor;
+import me.neznamy.tab.platforms.bukkit.BukkitTabPlayer;
 import me.neznamy.tab.shared.TabConstants;
 import me.neznamy.tab.shared.platform.TabPlayer;
 import me.neznamy.tab.api.bossbar.BossBar;
@@ -10,7 +11,6 @@ import me.neznamy.tab.shared.backend.BackendTabPlayer;
 import me.neznamy.tab.shared.features.bossbar.BossBarManagerImpl;
 import org.bukkit.Bukkit;
 import org.bukkit.Location;
-import org.bukkit.entity.Player;
 import org.bukkit.event.EventHandler;
 import org.bukkit.event.HandlerList;
 import org.bukkit.event.Listener;
@@ -24,15 +24,18 @@ import org.jetbrains.annotations.NotNull;
 @RequiredArgsConstructor
 public class WitherBossBar extends BossBarManagerImpl implements Listener, WorldSwitchListener {
 
-    /** Distance of the Wither in blocks */
-    private static final int WITHER_DISTANCE = 60;
-
-    /** Reference to plugin for registering listener */
-    private final @NotNull JavaPlugin plugin;
+    /**
+     * Constructs new instance and registers events
+     *
+     * @param   plugin
+     *          Plugin instance to register events
+     */
+    public WitherBossBar(JavaPlugin plugin) {
+        Bukkit.getPluginManager().registerEvents(this, plugin);
+    }
 
     @Override
     public void load() {
-        Bukkit.getPluginManager().registerEvents(this, plugin);
         //when MC is on fullscreen, BossBar disappears after 1 second of not being seen
         //when in a small window, it's about 100ms
         TAB.getInstance().getCPUManager().startRepeatingMeasuredTask(100,
@@ -49,9 +52,10 @@ public class WitherBossBar extends BossBarManagerImpl implements Listener, World
             if (p.getVersion().getMinorVersion() > 8) continue; //sending VV packets to those
             for (BossBar line : getRegisteredBossBars().values()) {
                 if (!line.getPlayers().contains(p)) continue;
-                Location loc = ((Player) p.getPlayer()).getEyeLocation().add(((Player) p.getPlayer()).getEyeLocation().getDirection().normalize().multiply(WITHER_DISTANCE));
+                Location eyeLocation = ((BukkitTabPlayer)p).getPlayer().getEyeLocation();
+                Location loc = eyeLocation.add(eyeLocation.getDirection().normalize().multiply(60)); // Wither distance
                 if (loc.getY() < 1) loc.setY(1);
-                ((BackendTabPlayer)p).teleportEntity(line.getUniqueId().hashCode(), new me.neznamy.tab.shared.backend.Location(loc.getX(), loc.getY(), loc.getZ(), 0, 0));
+                ((BackendTabPlayer)p).getEntityView().teleportEntity(line.getUniqueId().hashCode(), new me.neznamy.tab.shared.backend.Location(loc.getX(), loc.getY(), loc.getZ()));
             }
         }
     }

bukkit/src/main/java/me/neznamy/tab/platforms/bukkit/header/BukkitHeaderFooter.java

@@ -0,0 +1,33 @@
+package me.neznamy.tab.platforms.bukkit.header;
+
+import lombok.Getter;
+import me.neznamy.tab.platforms.bukkit.BukkitTabPlayer;
+import me.neznamy.tab.platforms.bukkit.BukkitUtils;
+import me.neznamy.tab.shared.chat.IChatBaseComponent;
+import me.neznamy.tab.shared.util.ReflectionUtils;
+import org.bukkit.entity.Player;
+import org.jetbrains.annotations.NotNull;
+
+/**
+ * Header/footer sender using Bukkit API. Despite this feature getting
+ * added into the game in 1.8, Bukkit team took 4 entire years to add
+ * it to the API, which eventually made it there in 1.13. <p>
+ * The input is just a String, meaning Bukkit will have to deserialize it
+ * into components, which is a massive performance loss. It also does not
+ * seem to support fonts.
+ */
+public class BukkitHeaderFooter extends HeaderFooter {
+
+    /** Flag tracking whether this class can be used on current server */
+    @Getter
+    private static final boolean available = ReflectionUtils.methodExists(Player.class, "setPlayerListHeaderFooter", String.class, String.class);
+
+    @Override
+    @SuppressWarnings("deprecation") // Marked as deprecated by Paper to make us use their methods instead
+    public void set(@NotNull BukkitTabPlayer player, @NotNull IChatBaseComponent header, @NotNull IChatBaseComponent footer) {
+        player.getPlayer().setPlayerListHeaderFooter(
+                BukkitUtils.toBukkitFormat(header, player.getVersion().getMinorVersion() >= 16),
+                BukkitUtils.toBukkitFormat(footer, player.getVersion().getMinorVersion() >= 16)
+        );
+    }
+}

bukkit/src/main/java/me/neznamy/tab/platforms/bukkit/header/HeaderFooter.java

@@ -0,0 +1,55 @@
+package me.neznamy.tab.platforms.bukkit.header;
+
+import lombok.Getter;
+import me.neznamy.tab.platforms.bukkit.BukkitTabPlayer;
+import me.neznamy.tab.platforms.bukkit.nms.PacketSender;
+import me.neznamy.tab.shared.chat.EnumChatFormat;
+import me.neznamy.tab.shared.chat.IChatBaseComponent;
+import org.bukkit.Bukkit;
+import org.jetbrains.annotations.NotNull;
+import org.jetbrains.annotations.Nullable;
+
+/**
+ * A class responsible for sending header/footer to players on request.
+ */
+public abstract class HeaderFooter {
+
+    /** Instance of the class, null if no implementation is available */
+    @Getter
+    @Nullable
+    private static HeaderFooter instance;
+
+    /**
+     * Finds the best available instance for current server software.
+     */
+    public static void findInstance() {
+        if (PaperHeaderFooter.isAvailable()) {
+            instance = new PaperHeaderFooter();
+        } else if (PacketHeaderFooter.isAvailable() && PacketSender.isAvailable()) {
+            instance = new PacketHeaderFooter();
+        } else if (BukkitHeaderFooter.isAvailable()) {
+            instance = new BukkitHeaderFooter();
+            Bukkit.getConsoleSender().sendMessage(EnumChatFormat.RED.getFormat() + "[TAB] Failed to initialize NMS fields for " +
+                    "sending Header/Footer due to a compatibility error. Using fallback solution using Bukkit API. " +
+                    "This will drastically drop performance, as well as miss support for fonts (added in 1.16). " +
+                    "Please update the plugin to version with proper support for your server version.");
+        } else {
+            Bukkit.getConsoleSender().sendMessage(EnumChatFormat.RED.getFormat() + "[TAB] Failed to initialize NMS fields for " +
+                    "sending Header/Footer due to a compatibility error. No fallback solution was found either. This will " +
+                    "result in the feature not working. " +
+                    "Please update the plugin to version with proper support for your server version.");
+        }
+    }
+
+    /**
+     * Sends header/footer to player.
+     *
+     * @param   player
+     *          Player to send header/footer to.
+     * @param   header
+     *          Header to use.
+     * @param   footer
+     *          Footer to use.
+     */
+    public abstract void set(@NotNull BukkitTabPlayer player, @NotNull IChatBaseComponent header, @NotNull IChatBaseComponent footer);
+}

bukkit/src/main/java/me/neznamy/tab/platforms/bukkit/header/PacketHeaderFooter.java

@@ -0,0 +1,73 @@
+package me.neznamy.tab.platforms.bukkit.header;
+
+import lombok.Getter;
+import lombok.SneakyThrows;
+import me.neznamy.tab.platforms.bukkit.BukkitTabPlayer;
+import me.neznamy.tab.platforms.bukkit.nms.BukkitReflection;
+import me.neznamy.tab.shared.chat.IChatBaseComponent;
+import me.neznamy.tab.shared.platform.TabPlayer;
+import me.neznamy.tab.shared.util.ComponentCache;
+import me.neznamy.tab.shared.util.ReflectionUtils;
+import org.jetbrains.annotations.NotNull;
+
+import java.lang.reflect.Constructor;
+import java.lang.reflect.Field;
+import java.lang.reflect.Method;
+
+/**
+ * Header/footer sender that uses NMS to send packets. Available
+ * on all versions since 1.8 when the feature was added into the game.
+ */
+public class PacketHeaderFooter extends HeaderFooter {
+
+    private static Constructor<?> newHeaderFooter;
+    private static Field HEADER;
+    private static Field FOOTER;
+    private static Method ChatSerializer_DESERIALIZE;
+    private static final ComponentCache<IChatBaseComponent, Object> componentCache = new ComponentCache<>(1000,
+            (component, clientVersion) -> ChatSerializer_DESERIALIZE.invoke(null, component.toString(clientVersion)));
+
+    @Getter
+    private static boolean available;
+
+    static {
+        try {
+            if (BukkitReflection.getMinorVersion() >= 8) {
+                Class<?> IChatBaseComponent = BukkitReflection.getClass("network.chat.Component",
+                        "network.chat.IChatBaseComponent", "IChatBaseComponent");
+                Class<?> HeaderFooterClass = BukkitReflection.getClass("network.protocol.game.ClientboundTabListPacket",
+                        "network.protocol.game.PacketPlayOutPlayerListHeaderFooter", "PacketPlayOutPlayerListHeaderFooter");
+                Class<?> ChatSerializer = BukkitReflection.getClass("network.chat.Component$Serializer",
+                        "network.chat.IChatBaseComponent$ChatSerializer", "IChatBaseComponent$ChatSerializer", "ChatSerializer");
+                ChatSerializer_DESERIALIZE = ReflectionUtils.getMethods(ChatSerializer, Object.class, String.class).get(0);
+                if (BukkitReflection.getMinorVersion() >= 17) {
+                    newHeaderFooter = HeaderFooterClass.getConstructor(IChatBaseComponent, IChatBaseComponent);
+                } else {
+                    newHeaderFooter = HeaderFooterClass.getConstructor();
+                    HEADER = ReflectionUtils.getFields(HeaderFooterClass, IChatBaseComponent).get(0);
+                    FOOTER = ReflectionUtils.getFields(HeaderFooterClass, IChatBaseComponent).get(1);
+                }
+                available = true;
+            }
+        } catch (Exception ignored) {
+            // Print exception to find out what went wrong
+        }
+    }
+
+    @SneakyThrows
+    @Override
+    public void set(@NotNull BukkitTabPlayer player, @NotNull IChatBaseComponent header, @NotNull IChatBaseComponent footer) {
+        if (BukkitReflection.getMinorVersion() >= 17) {
+            player.sendPacket(newHeaderFooter.newInstance(convert(header, player), convert(footer, player)));
+        } else {
+            Object packet = newHeaderFooter.newInstance();
+            HEADER.set(packet, convert(header, player));
+            FOOTER.set(packet, convert(footer, player));
+            player.sendPacket(packet);
+        }
+    }
+
+    private Object convert(IChatBaseComponent component, TabPlayer player) {
+        return componentCache.get(component, player.getVersion());
+    }
+}

bukkit/src/main/java/me/neznamy/tab/platforms/bukkit/header/PaperHeaderFooter.java

@@ -0,0 +1,32 @@
+package me.neznamy.tab.platforms.bukkit.header;
+
+import lombok.Getter;
+import me.neznamy.tab.platforms.bukkit.BukkitTabPlayer;
+import me.neznamy.tab.shared.chat.IChatBaseComponent;
+import me.neznamy.tab.shared.hook.AdventureHook;
+import me.neznamy.tab.shared.util.ReflectionUtils;
+import net.kyori.adventure.text.Component;
+import org.bukkit.entity.Player;
+import org.jetbrains.annotations.NotNull;
+
+/**
+ * Header/footer sender using Paper's API added in 1.16.5.
+ * Thanks to both cache and direct component conversion, this
+ * implementation is even faster than using NMS components
+ * and is therefore preferred if available.
+ */
+public class PaperHeaderFooter extends HeaderFooter {
+
+    /** Flag tracking whether this class can be used on current server */
+    @Getter
+    private static final boolean available = ReflectionUtils.classExists("net.kyori.adventure.text.Component") &&
+            ReflectionUtils.methodExists(Player.class, "sendPlayerListHeaderAndFooter", Component.class, Component.class);
+
+    @Override
+    public void set(@NotNull BukkitTabPlayer player, @NotNull IChatBaseComponent header, @NotNull IChatBaseComponent footer) {
+        player.getPlayer().sendPlayerListHeaderAndFooter(
+                AdventureHook.toAdventureComponent(header, player.getVersion()),
+                AdventureHook.toAdventureComponent(footer, player.getVersion())
+        );
+    }
+}

bukkit/src/main/java/me/neznamy/tab/platforms/bukkit/hook/LibsDisguisesHook.java

@@ -0,0 +1,33 @@
+package me.neznamy.tab.platforms.bukkit.hook;
+
+import me.libraryaddict.disguise.DisguiseAPI;
+import me.neznamy.tab.platforms.bukkit.BukkitTabPlayer;
+import me.neznamy.tab.shared.platform.TabPlayer;
+import me.neznamy.tab.shared.util.ReflectionUtils;
+
+/**
+ * Class for hooking into LibsDisguises to get disguise status of players.
+ */
+public class LibsDisguisesHook {
+
+    /** Flag tracking if LibsDisguises is installed or not */
+    private static boolean installed = ReflectionUtils.classExists("me.libraryaddict.disguise.DisguiseAPI");
+
+    /**
+     * Returns {@code true} if LibsDisguises is installed and player is disguised,
+     * {@code false} otherwise.
+     *
+     * @param   player
+     *          Player to check
+     * @return  {@code true} if disguised, {@code false} otherwise
+     */
+    public static boolean isDisguised(TabPlayer player) {
+        try {
+            return installed && DisguiseAPI.isDisguised(((BukkitTabPlayer)player).getPlayer());
+        } catch (LinkageError e) {
+            //java.lang.NoClassDefFoundError: Could not initialize class me.libraryaddict.disguise.DisguiseAPI
+            installed = false;
+            return false;
+        }
+    }
+}

bukkit/src/main/java/me/neznamy/tab/platforms/bukkit/nms/BukkitReflection.java

@@ -0,0 +1,61 @@
+package me.neznamy.tab.platforms.bukkit.nms;
+
+import lombok.Getter;
+import me.neznamy.tab.shared.util.ReflectionUtils;
+import org.bukkit.Bukkit;
+import org.jetbrains.annotations.NotNull;
+
+import java.util.Arrays;
+
+public class BukkitReflection {
+
+    /** Server's NMS/CraftBukkit package */
+    @Getter
+    private static final String serverPackage = Bukkit.getServer().getClass().getPackage().getName().split("\\.")[3];
+
+    /** Server's minor version */
+    @Getter
+    private static final int minorVersion = Integer.parseInt(serverPackage.split("_")[1]);
+
+    /** Flag determining whether the server version is at least 1.19.3 or not */
+    @Getter
+    private static final boolean is1_19_3Plus = ReflectionUtils.classExists("net.minecraft.network.protocol.game.ClientboundPlayerInfoUpdatePacket");
+
+    /** Flag determining whether the server version is at least 1.19.4 or not */
+    @Getter
+    private static final boolean is1_19_4Plus = is1_19_3Plus && !serverPackage.equals("v1_19_R2");
+
+    /** Flag determining whether the server version is at least 1.20.2 or not */
+    @Getter
+    private static final boolean is1_20_2Plus = ReflectionUtils.classExists("net.minecraft.world.scores.DisplaySlot");
+
+    /** Flag determining whether the server version is at least 1.20.3 or not */
+    @Getter
+    private static final boolean is1_20_3Plus = ReflectionUtils.classExists("net.minecraft.network.protocol.game.ClientboundResetScorePacket");
+
+    /**
+     * Returns class with given potential names in same order. For 1.17+ it takes packaged class names
+     * without "net.minecraft." prefix, for <1.17 it takes class name only.
+     *
+     * @param   names
+     *          possible class names
+     * @return  class for specified names
+     * @throws  ClassNotFoundException
+     *          if class does not exist
+     */
+    public static Class<?> getClass(@NotNull String... names) throws ClassNotFoundException {
+        ClassLoader loader = BukkitReflection.class.getClassLoader();
+        for (String name : names) {
+            try {
+                if (minorVersion >= 17) {
+                    return Class.forName("net.minecraft." + name);
+                } else {
+                    return loader.loadClass("net.minecraft.server." + serverPackage + "." + name);
+                }
+            } catch (ClassNotFoundException | NullPointerException ignored) {
+                // not the first class name in array
+            }
+        }
+        throw new ClassNotFoundException("No class found with possible names " + Arrays.toString(names));
+    }
+}

bukkit/src/main/java/me/neznamy/tab/platforms/bukkit/nms/DataWatcher.java

@@ -0,0 +1,283 @@
+package me.neznamy.tab.platforms.bukkit.nms;
+
+import lombok.*;
+import me.neznamy.tab.shared.ProtocolVersion;
+import me.neznamy.tab.shared.backend.EntityData;
+import me.neznamy.tab.shared.chat.IChatBaseComponent;
+import me.neznamy.tab.shared.util.ComponentCache;
+import me.neznamy.tab.shared.util.ReflectionUtils;
+import org.jetbrains.annotations.NotNull;
+import org.jetbrains.annotations.Nullable;
+
+import java.lang.reflect.Constructor;
+import java.lang.reflect.Method;
+import java.util.HashMap;
+import java.util.Map;
+import java.util.Optional;
+
+/**
+ * A class representing the n.m.s.DataWatcher class to make work with it much easier
+ */
+@ToString
+public class DataWatcher implements EntityData {
+
+    /** NMS Fields */
+    public static Class<?> DataWatcher;
+    private static Constructor<?> newDataWatcher;
+    private static Method DataWatcher_register;
+    private static Method DataWatcher_markDirty;
+    public static Method DataWatcher_packDirty;
+
+    private static Class<?> DataWatcherObject;
+    private static Constructor<?> newDataWatcherObject;
+
+    private static Object DataWatcherSerializer_BYTE;
+    private static Object DataWatcherSerializer_FLOAT;
+    private static Object DataWatcherSerializer_STRING;
+    private static Object DataWatcherSerializer_OPTIONAL_COMPONENT;
+    private static Object DataWatcherSerializer_BOOLEAN;
+
+    private static final int armorStandFlagsPosition = getArmorStandFlagsPosition();
+
+    private static Method ChatSerializer_DESERIALIZE;
+    private static final ComponentCache<IChatBaseComponent, Object> componentCache = new ComponentCache<>(1000,
+            (component, clientVersion) -> ChatSerializer_DESERIALIZE.invoke(null, component.toString(clientVersion)));
+
+    /** Watched data */
+    private final Map<Integer, Item> dataValues = new HashMap<>();
+
+    /**
+     * Returns armor stand flags position based on server version
+     *
+     * @return  armor stand flags position based on server version
+     */
+    private static int getArmorStandFlagsPosition() {
+        if (BukkitReflection.getMinorVersion() >= 17) {
+            //1.17.x, 1.18.x, 1.19.x, 1.20.x
+            return 15;
+        } else if (BukkitReflection.getMinorVersion() >= 15) {
+            //1.15.x, 1.16.x
+            return 14;
+        } else if (BukkitReflection.getMinorVersion() == 14) {
+            //1.14.x
+            return 13;
+        } else if (BukkitReflection.getMinorVersion() >= 10) {
+            //1.10.x - 1.13.x
+            return 11;
+        } else {
+            //1.8.x - 1.9.x
+            return 10;
+        }
+    }
+    
+    /**
+     * Loads all required Fields and throws Exception if something went wrong
+     */
+    public static void load() throws ReflectiveOperationException {
+        int minorVersion = BukkitReflection.getMinorVersion();
+        DataWatcher = BukkitReflection.getClass("network.syncher.SynchedEntityData", "network.syncher.DataWatcher", "DataWatcher");
+        if (minorVersion >= 7) {
+            Class<?> ChatSerializer = BukkitReflection.getClass("network.chat.Component$Serializer",
+                    "network.chat.IChatBaseComponent$ChatSerializer", "IChatBaseComponent$ChatSerializer", "ChatSerializer");
+            ChatSerializer_DESERIALIZE = ReflectionUtils.getMethods(ChatSerializer, Object.class, String.class).get(0);
+            newDataWatcher = DataWatcher.getConstructor(BukkitReflection.getClass("world.entity.Entity", "Entity"));
+        } else {
+            newDataWatcher = DataWatcher.getConstructor();
+        }
+        if (minorVersion >= 9) {
+            DataWatcherObject = BukkitReflection.getClass("network.syncher.EntityDataAccessor",
+                    "network.syncher.DataWatcherObject", "DataWatcherObject");
+            Class<?> dataWatcherRegistry = BukkitReflection.getClass("network.syncher.EntityDataSerializers",
+                    "network.syncher.DataWatcherRegistry", "DataWatcherRegistry");
+            Class<?> dataWatcherSerializer = BukkitReflection.getClass("network.syncher.EntityDataSerializer",
+                    "network.syncher.DataWatcherSerializer", "DataWatcherSerializer");
+            DataWatcher_register = ReflectionUtils.getMethod(
+                    DataWatcher,
+                    new String[]{"define", "register", "a", "m_135372_"}, // {Mojang, Bukkit, Bukkit 1.18+, Mohist 1.18.2}
+                    DataWatcherObject, Object.class
+            );
+            newDataWatcherObject = DataWatcherObject.getConstructor(int.class, dataWatcherSerializer);
+            DataWatcherSerializer_BYTE = ReflectionUtils.getField(dataWatcherRegistry, "BYTE", "a", "f_135027_").get(null); // Mohist 1.18.2
+            DataWatcherSerializer_FLOAT = ReflectionUtils.getField(dataWatcherRegistry, "FLOAT", "c", "f_135029_").get(null); // Mohist 1.18.2
+            DataWatcherSerializer_STRING = ReflectionUtils.getField(dataWatcherRegistry, "STRING", "d", "f_135030_").get(null); // Mohist 1.18.2
+            if (BukkitReflection.is1_19_3Plus()) {
+                DataWatcherSerializer_OPTIONAL_COMPONENT = ReflectionUtils.getField(dataWatcherRegistry, "OPTIONAL_COMPONENT", "g").get(null);
+                if (BukkitReflection.is1_19_4Plus()) {
+                    DataWatcherSerializer_BOOLEAN = ReflectionUtils.getField(dataWatcherRegistry, "BOOLEAN", "k").get(null);
+                } else {
+                    DataWatcherSerializer_BOOLEAN = ReflectionUtils.getField(dataWatcherRegistry, "BOOLEAN", "j").get(null);
+                }
+            } else {
+                if (minorVersion >= 13) {
+                    DataWatcherSerializer_OPTIONAL_COMPONENT = ReflectionUtils.getField(dataWatcherRegistry,
+                            "OPTIONAL_COMPONENT", "f", "f_135032_").get(null); // Mohist 1.18.2
+                    DataWatcherSerializer_BOOLEAN = ReflectionUtils.getField(dataWatcherRegistry,
+                            "BOOLEAN", "i", "f_135035_").get(null); // Mohist 1.18.2
+                } else {
+                    DataWatcherSerializer_BOOLEAN = dataWatcherRegistry.getDeclaredField("h").get(null);
+                }
+            }
+        } else {
+            DataWatcher_register = ReflectionUtils.getMethod(
+                    DataWatcher,
+                    new String[]{"func_75682_a", "a"}, int.class, // {Thermos 1.7.10, Bukkit}
+                    Object.class
+            );
+        }
+        if (minorVersion >= 19) {
+            DataWatcher_packDirty = ReflectionUtils.getMethod(DataWatcher, new String[] {"packDirty", "b"}); // {Mojang, Bukkit}
+        }
+        if (BukkitReflection.is1_19_3Plus()) {
+            DataWatcher_markDirty = ReflectionUtils.getMethods(DataWatcher, void.class, DataWatcherObject).get(0);
+        }
+    }
+    
+    /**
+     * Sets value into data values
+     *
+     * @param   position
+     *          data position
+     * @param   serializer
+     *          Object serializer (1.9+)
+     * @param   value
+     *          value
+     */
+    public void setValue(int position, @Nullable Object serializer, @NotNull Object value) {
+        dataValues.put(position, new Item(position, serializer, value));
+    }
+
+    /**
+     * Writes entity byte flags
+     *
+     * @param   flags
+     *          flags to write
+     */
+    public void setEntityFlags(byte flags) {
+        setValue(0, DataWatcherSerializer_BYTE, flags);
+    }
+
+    /**
+     * Writes entity custom name with position based on server version and value depending on client version (RGB or not)
+     *
+     * @param   customName
+     *          target custom name
+     * @param   clientVersion
+     *          client version
+     */
+    public void setCustomName(@NotNull String customName, @NotNull ProtocolVersion clientVersion) {
+        if (BukkitReflection.getMinorVersion() >= 13) {
+            setValue(2, DataWatcherSerializer_OPTIONAL_COMPONENT,
+                    Optional.of(componentCache.get(IChatBaseComponent.optimizedComponent(customName), clientVersion)));
+        } else if (BukkitReflection.getMinorVersion() >= 8) {
+            setValue(2, DataWatcherSerializer_STRING, customName);
+        } else {
+            //name length is limited to 64 characters on <1.8
+            String cutName = (customName.length() > 64 ? customName.substring(0, 64) : customName);
+            if (BukkitReflection.getMinorVersion() >= 6) {
+                setValue(10, null, cutName);
+            } else {
+                setValue(5, null, cutName);
+            }
+        }
+    }
+
+    /**
+     * Writes custom name visibility boolean
+     *
+     * @param   visible
+     *          if visible or not
+     */
+    public void setCustomNameVisible(boolean visible) {
+        if (BukkitReflection.getMinorVersion() >= 9) {
+            setValue(3, DataWatcherSerializer_BOOLEAN, visible);
+        } else {
+            setValue(3, null, (byte)(visible?1:0));
+        }
+    }
+
+    /**
+     * Writes entity health
+     *
+     * @param   health
+     *          health of entity
+     */
+    public void setHealth(float health) {
+        if (BukkitReflection.getMinorVersion() >= 6) {
+            setValue(6, DataWatcherSerializer_FLOAT, health);
+        } else {
+            setValue(16, null, (int)health);
+        }
+    }
+
+    /**
+     * Writes armor stand flags
+     *
+     * @param   flags
+     *          flags to write
+     */
+    public void setArmorStandFlags(byte flags) {
+        setValue(armorStandFlagsPosition, DataWatcherSerializer_BYTE, flags);
+    }
+
+    /**
+     * Writes wither invulnerable time
+     * @param   time
+     *          Time, apparently
+     */
+    public void setWitherInvulnerableTime(int time) {
+        if (BukkitReflection.getMinorVersion() > 8)
+            throw new UnsupportedOperationException("Not supported on 1.9+");
+        setValue(20, null, time);
+    }
+
+    /**
+     * Converts the class into an instance of NMS.DataWatcher
+     *
+     * @return  an instance of NMS.DataWatcher with same data
+     */
+    @SneakyThrows
+    public @NotNull Object build() {
+        Object nmsWatcher;
+        if (newDataWatcher.getParameterCount() == 1) { //1.7+
+            nmsWatcher = newDataWatcher.newInstance(new Object[] {null});
+        } else {
+            nmsWatcher = newDataWatcher.newInstance();
+        }
+        for (Item item : dataValues.values()) {
+            Object nmsObject = item.createObject();
+            DataWatcher_register.invoke(nmsWatcher, nmsObject, item.getValue());
+            if (BukkitReflection.is1_19_3Plus()) DataWatcher_markDirty.invoke(nmsWatcher, nmsObject);
+        }
+        return nmsWatcher;
+    }
+
+    @RequiredArgsConstructor
+    @Getter
+    public static class Item {
+
+        /** Item position */
+        private final int position;
+
+        /** Item serializer (1.9+) */
+        @Nullable
+        private final Object serializer;
+
+        /** Item value */
+        @NotNull
+        private final Object value;
+
+        /**
+         * Creates data watcher object with position and serializer
+         *
+         * @return  NMS data watcher object
+         */
+        @SneakyThrows
+        public Object createObject() {
+            if (BukkitReflection.getMinorVersion() >= 9) {
+                return newDataWatcherObject.newInstance(position, serializer);
+            } else {
+                return position;
+            }
+        }
+    }
+}

bukkit/src/main/java/me/neznamy/tab/platforms/bukkit/nms/PacketEntityView.java

@@ -0,0 +1,409 @@
+package me.neznamy.tab.platforms.bukkit.nms;
+
+import lombok.Getter;
+import lombok.RequiredArgsConstructor;
+import lombok.SneakyThrows;
+import me.neznamy.tab.platforms.bukkit.BukkitTabPlayer;
+import me.neznamy.tab.shared.backend.EntityData;
+import me.neznamy.tab.shared.backend.Location;
+import me.neznamy.tab.shared.backend.entityview.EntityView;
+import me.neznamy.tab.shared.util.ReflectionUtils;
+import org.bukkit.Bukkit;
+import org.bukkit.entity.EntityType;
+import org.jetbrains.annotations.NotNull;
+
+import java.lang.reflect.Constructor;
+import java.lang.reflect.Field;
+import java.lang.reflect.Method;
+import java.util.Arrays;
+import java.util.EnumMap;
+import java.util.List;
+import java.util.UUID;
+
+@RequiredArgsConstructor
+@SuppressWarnings("unchecked")
+public class PacketEntityView implements EntityView {
+
+    /** PacketPlayOutEntityDestroy */
+    private static Class<?> EntityDestroyClass;
+    private static Constructor<?> newEntityDestroy;
+    private static Field EntityDestroy_Entities;
+
+    /** PacketPlayOutEntityMetadata */
+    private static Constructor<?> newEntityMetadata;
+    
+    /** PacketPlayOutEntityTeleport */
+    private static Class<?> EntityTeleportClass;
+    private static Constructor<?> newEntityTeleport;
+    private static Field EntityTeleport_EntityId;
+    private static Field EntityTeleport_X;
+    private static Field EntityTeleport_Y;
+    private static Field EntityTeleport_Z;
+
+    /** PacketPlayOutSpawnEntityLiving */
+    private static Class<?> SpawnEntityClass;
+    private static Constructor<?> newSpawnEntity;
+
+    /** 1.17+ */
+    private static Object Vec3D_Empty;
+    private static Object EntityTypes_ARMOR_STAND;
+
+    /** 1.16.5- */
+    private static Field SpawnEntity_EntityId;
+    private static Field SpawnEntity_EntityType;
+    private static Field SpawnEntity_UUID;
+    private static Field SpawnEntity_X;
+    private static Field SpawnEntity_Y;
+    private static Field SpawnEntity_Z;
+    private static Field SpawnEntity_DataWatcher;
+    private static final EnumMap<EntityType, Integer> entityIds = new EnumMap<>(EntityType.class);
+
+    /** Other entity packets */
+    private static Class<?> PacketPlayOutEntity;
+    private static Field PacketPlayOutEntity_ENTITYID;
+    private static Class<?> PacketPlayOutEntityLook;
+    private static Class<?> PacketPlayOutNamedEntitySpawn;
+    private static Field PacketPlayOutNamedEntitySpawn_ENTITYID;
+
+    private static Class<?> ClientboundBundlePacket;
+    private static Field ClientboundBundlePacket_packets;
+
+    private static Object dummyEntity;
+
+    @Getter
+    private static boolean available;
+
+    /** Player this view belongs to */
+    private final BukkitTabPlayer player;
+
+    /**
+     * Loads all required classes and fields and throws Exception if something went wrong
+     *
+     * @throws  ReflectiveOperationException
+     *          If something fails
+     */
+    public static void load() throws ReflectiveOperationException {
+        loadEntityMetadata();
+        loadEntityDestroy();
+        loadEntityTeleport();
+        loadEntityMove();
+        loadEntitySpawn();
+        if (BukkitReflection.is1_19_4Plus()) {
+            ClientboundBundlePacket = Class.forName("net.minecraft.network.protocol.game.ClientboundBundlePacket");
+            ClientboundBundlePacket_packets = ReflectionUtils.getOnlyField(ClientboundBundlePacket.getSuperclass(), Iterable.class);
+        }
+        available = true;
+    }
+
+    private static void loadEntityMetadata() throws ReflectiveOperationException {
+        // Class
+        Class<?> entityMetadataClass = getClass("network.protocol.game.ClientboundSetEntityDataPacket",
+                "network.protocol.game.PacketPlayOutEntityMetadata", "PacketPlayOutEntityMetadata", "Packet40EntityMetadata");
+
+        // Constructor
+        if (BukkitReflection.is1_19_3Plus()) {
+            newEntityMetadata = entityMetadataClass.getConstructor(int.class, List.class);
+        } else {
+            newEntityMetadata = entityMetadataClass.getConstructor(int.class, DataWatcher.DataWatcher, boolean.class);
+        }
+    }
+
+    private static void loadEntityDestroy() throws ReflectiveOperationException {
+        // Class
+        EntityDestroyClass = getClass("network.protocol.game.ClientboundRemoveEntitiesPacket",
+                "network.protocol.game.PacketPlayOutEntityDestroy", "PacketPlayOutEntityDestroy", "Packet29DestroyEntity");
+
+        // Constructor
+        try {
+            newEntityDestroy = EntityDestroyClass.getConstructor(int[].class);
+        } catch (NoSuchMethodException e) {
+            //1.17.0
+            newEntityDestroy = EntityDestroyClass.getConstructor(int.class);
+        }
+
+        // Field
+        EntityDestroy_Entities = ReflectionUtils.getOnlyField(EntityDestroyClass);
+    }
+
+    private static void loadEntityTeleport() throws ReflectiveOperationException {
+        // Class
+        EntityTeleportClass = getClass("network.protocol.game.ClientboundTeleportEntityPacket",
+                "network.protocol.game.PacketPlayOutEntityTeleport", "PacketPlayOutEntityTeleport", "Packet34EntityTeleport");
+
+        // Constructor
+        if (BukkitReflection.getMinorVersion() >= 17) {
+            newEntityTeleport = EntityTeleportClass.getConstructor(getClass("world.entity.Entity"));
+        } else {
+            newEntityTeleport = EntityTeleportClass.getConstructor();
+        }
+
+        // Fields
+        EntityTeleport_EntityId = ReflectionUtils.getFields(EntityTeleportClass, int.class).get(0);
+        if (BukkitReflection.getMinorVersion() >= 9) {
+            EntityTeleport_X = ReflectionUtils.getFields(EntityTeleportClass, double.class).get(0);
+            EntityTeleport_Y = ReflectionUtils.getFields(EntityTeleportClass, double.class).get(1);
+            EntityTeleport_Z = ReflectionUtils.getFields(EntityTeleportClass, double.class).get(2);
+        } else {
+            EntityTeleport_X = ReflectionUtils.getFields(EntityTeleportClass, int.class).get(1);
+            EntityTeleport_Y = ReflectionUtils.getFields(EntityTeleportClass, int.class).get(2);
+            EntityTeleport_Z = ReflectionUtils.getFields(EntityTeleportClass, int.class).get(3);
+        }
+
+        // Dummy armor stand for constructor
+        if (BukkitReflection.getMinorVersion() >= 17) {
+            Class<?> world = getClass("world.level.Level", "world.level.World", "World");
+            Class<?> entityArmorStand = getClass("world.entity.decoration.ArmorStand",
+                    "world.entity.decoration.EntityArmorStand", "EntityArmorStand");
+            Constructor<?> newEntityArmorStand = entityArmorStand.getConstructor(world, double.class, double.class, double.class);
+            Method World_getHandle = Class.forName("org.bukkit.craftbukkit." + BukkitReflection.getServerPackage() + ".CraftWorld").getMethod("getHandle");
+            dummyEntity = newEntityArmorStand.newInstance(World_getHandle.invoke(Bukkit.getWorlds().get(0)), 0, 0, 0);
+        }
+    }
+
+    private static void loadEntityMove() throws ReflectiveOperationException {
+        // Classes
+        PacketPlayOutEntity = getClass("network.protocol.game.ClientboundMoveEntityPacket",
+                "network.protocol.game.PacketPlayOutEntity", "PacketPlayOutEntity", "Packet30Entity");
+        PacketPlayOutEntityLook = getClass("network.protocol.game.ClientboundMoveEntityPacket$Rot",
+                "network.protocol.game.PacketPlayOutEntity$PacketPlayOutEntityLook", "PacketPlayOutEntity$PacketPlayOutEntityLook",
+                "PacketPlayOutEntityLook", "Packet32EntityLook");
+
+        // Field
+        PacketPlayOutEntity_ENTITYID = ReflectionUtils.getFields(PacketPlayOutEntity, int.class).get(0);
+    }
+
+    private static void loadEntitySpawn() throws ReflectiveOperationException {
+        SpawnEntityClass = getClass("network.protocol.game.ClientboundAddEntityPacket",
+                "network.protocol.game.PacketPlayOutSpawnEntity", "PacketPlayOutSpawnEntityLiving", "Packet24MobSpawn");
+        SpawnEntity_EntityId = ReflectionUtils.getFields(SpawnEntityClass, int.class).get(0);
+        if (BukkitReflection.getMinorVersion() >= 17) {
+            Class<?> Vec3D = getClass("world.phys.Vec3", "world.phys.Vec3D");
+            Vec3D_Empty = ReflectionUtils.getOnlyField(Vec3D, Vec3D).get(null);
+            Class<?> EntityTypes = getClass("world.entity.EntityType", "world.entity.EntityTypes");
+            if (BukkitReflection.getMinorVersion() >= 19) {
+                EntityTypes_ARMOR_STAND = ReflectionUtils.getField(EntityTypes, "ARMOR_STAND", "d").get(null);
+            } else {
+                EntityTypes_ARMOR_STAND = ReflectionUtils.getField(EntityTypes, "ARMOR_STAND", "c", "f_20529_").get(null); // Mohist 1.18.2
+            }
+            if (BukkitReflection.getMinorVersion() >= 19) {
+                newSpawnEntity = SpawnEntityClass.getConstructor(int.class, UUID.class, double.class, double.class, double.class, float.class, float.class, EntityTypes, int.class, Vec3D, double.class);
+            } else {
+                newSpawnEntity = SpawnEntityClass.getConstructor(int.class, UUID.class, double.class, double.class, double.class, float.class, float.class, EntityTypes, int.class, Vec3D);
+            }
+        } else {
+            newSpawnEntity = SpawnEntityClass.getConstructor();
+            if (BukkitReflection.getMinorVersion() >= 9) {
+                SpawnEntity_UUID = ReflectionUtils.getOnlyField(SpawnEntityClass, UUID.class);
+                SpawnEntity_X = ReflectionUtils.getFields(SpawnEntityClass, double.class).get(0);
+                SpawnEntity_Y = ReflectionUtils.getFields(SpawnEntityClass, double.class).get(1);
+                SpawnEntity_Z = ReflectionUtils.getFields(SpawnEntityClass, double.class).get(2);
+            } else {
+                SpawnEntity_X = ReflectionUtils.getFields(SpawnEntityClass, int.class).get(2);
+                SpawnEntity_Y = ReflectionUtils.getFields(SpawnEntityClass, int.class).get(3);
+                SpawnEntity_Z = ReflectionUtils.getFields(SpawnEntityClass, int.class).get(4);
+            }
+            SpawnEntity_EntityType = ReflectionUtils.getFields(SpawnEntityClass, int.class).get(1);
+            if (BukkitReflection.getMinorVersion() <= 14) {
+                SpawnEntity_DataWatcher = ReflectionUtils.getOnlyField(SpawnEntityClass, DataWatcher.DataWatcher);
+            }
+        }
+        if (BukkitReflection.getMinorVersion() >= 13) {
+            entityIds.put(EntityType.ARMOR_STAND, 1);
+        } else {
+            entityIds.put(EntityType.WITHER, 64);
+            if (BukkitReflection.getMinorVersion() >= 8) {
+                entityIds.put(EntityType.ARMOR_STAND, 30);
+            }
+        }
+        if (!BukkitReflection.is1_20_2Plus()) {
+            PacketPlayOutNamedEntitySpawn = getClass("network.protocol.game.ClientboundAddPlayerPacket",
+                    "network.protocol.game.PacketPlayOutNamedEntitySpawn", "PacketPlayOutNamedEntitySpawn", "Packet20NamedEntitySpawn");
+            PacketPlayOutNamedEntitySpawn_ENTITYID = ReflectionUtils.getFields(PacketPlayOutNamedEntitySpawn, int.class).get(0);
+        }
+    }
+
+    private static int floor(double paramDouble) {
+        int i = (int)paramDouble;
+        return paramDouble < i ? i - 1 : i;
+    }
+
+    @SneakyThrows
+    @Override
+    public void spawnEntity(int entityId, @NotNull UUID id, @NotNull Object entityType, @NotNull Location l, @NotNull EntityData data) {
+        int minorVersion = BukkitReflection.getMinorVersion();
+        if (minorVersion >= 19) {
+            player.sendPacket(newSpawnEntity.newInstance(entityId, id, l.getX(), l.getY(), l.getZ(), 0, 0, EntityTypes_ARMOR_STAND, 0, Vec3D_Empty, 0d));
+        } else if (minorVersion >= 17) {
+            player.sendPacket(newSpawnEntity.newInstance(entityId, id, l.getX(), l.getY(), l.getZ(), 0, 0, EntityTypes_ARMOR_STAND, 0, Vec3D_Empty));
+        } else {
+            Object nmsPacket = newSpawnEntity.newInstance();
+            SpawnEntity_EntityId.set(nmsPacket, entityId);
+            if (minorVersion <= 14) {
+                SpawnEntity_DataWatcher.set(nmsPacket, data.build());
+            }
+            if (minorVersion >= 9) {
+                SpawnEntity_UUID.set(nmsPacket, id);
+                SpawnEntity_X.set(nmsPacket, l.getX());
+                SpawnEntity_Y.set(nmsPacket, l.getY());
+                SpawnEntity_Z.set(nmsPacket, l.getZ());
+            } else {
+                SpawnEntity_X.set(nmsPacket, floor(l.getX()*32));
+                SpawnEntity_Y.set(nmsPacket, floor(l.getY()*32));
+                SpawnEntity_Z.set(nmsPacket, floor(l.getZ()*32));
+            }
+            SpawnEntity_EntityType.set(nmsPacket, entityIds.get((EntityType) entityType));
+            player.sendPacket(nmsPacket);
+        }
+        if (BukkitReflection.getMinorVersion() >= 15) {
+            updateEntityMetadata(entityId, data);
+        }
+    }
+
+    @SneakyThrows
+    @Override
+    public void updateEntityMetadata(int entityId, @NotNull EntityData data) {
+        if (newEntityMetadata.getParameterCount() == 2) {
+            //1.19.3+
+            player.sendPacket(newEntityMetadata.newInstance(entityId, DataWatcher.DataWatcher_packDirty.invoke(data.build())));
+        } else {
+            player.sendPacket(newEntityMetadata.newInstance(entityId, data.build(), true));
+        }
+    }
+
+    @SneakyThrows
+    @Override
+    public void teleportEntity(int entityId, @NotNull Location location) {
+        Object nmsPacket;
+        if (BukkitReflection.getMinorVersion() >= 17) {
+            nmsPacket = newEntityTeleport.newInstance(dummyEntity);
+        } else {
+            nmsPacket = newEntityTeleport.newInstance();
+        }
+        EntityTeleport_EntityId.set(nmsPacket, entityId);
+        if (BukkitReflection.getMinorVersion() >= 9) {
+            EntityTeleport_X.set(nmsPacket, location.getX());
+            EntityTeleport_Y.set(nmsPacket, location.getY());
+            EntityTeleport_Z.set(nmsPacket, location.getZ());
+        } else {
+            EntityTeleport_X.set(nmsPacket, floor(location.getX()*32));
+            EntityTeleport_Y.set(nmsPacket, floor(location.getY()*32));
+            EntityTeleport_Z.set(nmsPacket, floor(location.getZ()*32));
+        }
+        player.sendPacket(nmsPacket);
+    }
+
+    @SneakyThrows
+    @Override
+    public void destroyEntities(int... entities) {
+        if (newEntityDestroy.getParameterTypes()[0] != int.class) {
+            player.sendPacket(newEntityDestroy.newInstance(new Object[]{entities}));
+        } else {
+            //1.17.0 Mojank
+            for (int entity : entities) {
+                player.sendPacket(newEntityDestroy.newInstance(entity));
+            }
+        }
+    }
+
+    @Override
+    public boolean isDestroyPacket(@NotNull Object packet) {
+        return EntityDestroyClass.isInstance(packet);
+    }
+
+    @Override
+    public boolean isTeleportPacket(@NotNull Object packet) {
+        return EntityTeleportClass.isInstance(packet);
+    }
+
+    @Override
+    public boolean isNamedEntitySpawnPacket(@NotNull Object packet) {
+        if (BukkitReflection.is1_20_2Plus()) {
+            return SpawnEntityClass.isInstance(packet);
+        } else {
+            return PacketPlayOutNamedEntitySpawn.isInstance(packet);
+        }
+    }
+
+    @Override
+    public boolean isMovePacket(@NotNull Object packet) {
+        return PacketPlayOutEntity.isInstance(packet);
+    }
+
+    @Override
+    public boolean isLookPacket(@NotNull Object packet) {
+        return PacketPlayOutEntityLook.isInstance(packet);
+    }
+
+    @Override
+    @SneakyThrows
+    public int getTeleportEntityId(@NotNull Object teleportPacket) {
+        return EntityTeleport_EntityId.getInt(teleportPacket);
+    }
+
+    @Override
+    @SneakyThrows
+    public int getMoveEntityId(@NotNull Object movePacket) {
+        return PacketPlayOutEntity_ENTITYID.getInt(movePacket);
+    }
+
+    @Override
+    @SneakyThrows
+    public int getSpawnedPlayer(@NotNull Object playerSpawnPacket) {
+        if (BukkitReflection.is1_20_2Plus()) {
+            return SpawnEntity_EntityId.getInt(playerSpawnPacket);
+        } else {
+            return PacketPlayOutNamedEntitySpawn_ENTITYID.getInt(playerSpawnPacket);
+        }
+    }
+
+    @Override
+    @SneakyThrows
+    public int[] getDestroyedEntities(@NotNull Object destroyPacket) {
+        Object entities = PacketEntityView.EntityDestroy_Entities.get(destroyPacket);
+        if (BukkitReflection.getMinorVersion() >= 17) {
+            if (entities instanceof List) {
+                return ((List<Integer>)entities).stream().mapToInt(i -> i).toArray();
+            } else {
+                //1.17.0
+                return new int[]{(int) entities};
+            }
+        } else {
+            return (int[]) entities;
+        }
+    }
+
+    @Override
+    public boolean isBundlePacket(@NotNull Object packet) {
+        return BukkitReflection.is1_19_4Plus() && ClientboundBundlePacket.isInstance(packet);
+    }
+
+    @Override
+    @SneakyThrows
+    public Iterable<Object> getPackets(@NotNull Object bundlePacket) {
+        return (Iterable<Object>) ClientboundBundlePacket_packets.get(bundlePacket);
+    }
+
+    /**
+     * Returns class from given potential names. Supports modded servers, such as Thermos.
+     *
+     * @param   names
+     *          Potential class names
+     * @return  class from given name
+     * @throws  ClassNotFoundException
+     *          if class was not found
+     */
+    public static Class<?> getClass(@NotNull String... names) throws ClassNotFoundException {
+        for (String name : names) {
+            try {
+                if (BukkitReflection.getMinorVersion() >= 17) {
+                    return PacketEntityView.class.getClassLoader().loadClass("net.minecraft." + name);
+                } else {
+                    return PacketEntityView.class.getClassLoader().loadClass("net.minecraft.server." + BukkitReflection.getServerPackage() + "." + name);
+                }
+            } catch (ClassNotFoundException | NullPointerException e) {
+                // Wrong class name
+            }
+        }
+        throw new ClassNotFoundException("No class found with potential names " + Arrays.toString(names));
+    }
+}

bukkit/src/main/java/me/neznamy/tab/platforms/bukkit/nms/PacketSender.java

@@ -0,0 +1,47 @@
+package me.neznamy.tab.platforms.bukkit.nms;
+
+import lombok.Getter;
+import lombok.SneakyThrows;
+import me.neznamy.tab.shared.chat.EnumChatFormat;
+import me.neznamy.tab.shared.util.ReflectionUtils;
+import org.bukkit.Bukkit;
+import org.bukkit.entity.Player;
+import org.jetbrains.annotations.NotNull;
+
+import java.lang.reflect.Field;
+import java.lang.reflect.Method;
+
+public class PacketSender {
+
+    private static Method getHandle;
+    private static Field PLAYER_CONNECTION;
+    private static Method sendPacket;
+    @Getter private static boolean available;
+
+    public static void tryLoad() {
+        try {
+            Class<?> Packet = BukkitReflection.getClass("network.protocol.Packet", "Packet");
+            Class<?> EntityPlayer = BukkitReflection.getClass("server.level.ServerPlayer", "server.level.EntityPlayer", "EntityPlayer");
+            Class<?> PlayerConnection = BukkitReflection.getClass("server.network.ServerGamePacketListenerImpl",
+                    "server.network.PlayerConnection", "PlayerConnection");
+            getHandle = Class.forName("org.bukkit.craftbukkit." + BukkitReflection.getServerPackage() + ".entity.CraftPlayer").getMethod("getHandle");
+            PLAYER_CONNECTION = ReflectionUtils.getOnlyField(EntityPlayer, PlayerConnection);
+            if (BukkitReflection.getMinorVersion() >= 7) {
+                sendPacket = ReflectionUtils.getMethods(PlayerConnection, void.class, Packet).get(0);
+            } else {
+                sendPacket = ReflectionUtils.getMethod(PlayerConnection, new String[]{"sendPacket"}, Packet);
+            }
+            available = true;
+        } catch (Exception e) {
+            Bukkit.getConsoleSender().sendMessage(EnumChatFormat.RED.getFormat() + "[TAB] Failed to initialize NMS fields for " +
+                    "sending packets due to a compatibility error. Majority of the features will not work / be very limited. " +
+                    "Please update the plugin to a version with proper support for your server version.");
+        }
+    }
+
+    @SneakyThrows
+    public static void sendPacket(@NotNull Player player, @NotNull Object packet) {
+        if (!player.isOnline() || sendPacket == null) return;
+        sendPacket.invoke(PLAYER_CONNECTION.get(getHandle.invoke(player)), packet);
+    }
+}

bukkit/src/main/java/me/neznamy/tab/platforms/bukkit/nms/PingRetriever.java

@@ -0,0 +1,41 @@
+package me.neznamy.tab.platforms.bukkit.nms;
+
+import lombok.SneakyThrows;
+import me.neznamy.tab.shared.chat.EnumChatFormat;
+import me.neznamy.tab.shared.util.ReflectionUtils;
+import org.bukkit.Bukkit;
+import org.bukkit.entity.Player;
+import org.jetbrains.annotations.NotNull;
+
+import java.lang.reflect.Field;
+import java.lang.reflect.Method;
+
+public class PingRetriever {
+
+    private static Method getHandle;
+    private static Field PING;
+
+    public static void tryLoad() {
+        try {
+            if (BukkitReflection.getMinorVersion() < 17) {
+                getHandle = Class.forName("org.bukkit.craftbukkit." + BukkitReflection.getServerPackage() + ".entity.CraftPlayer").getMethod("getHandle");
+                Class<?> EntityPlayer = BukkitReflection.getClass("server.level.ServerPlayer", "server.level.EntityPlayer", "EntityPlayer");
+                PING = ReflectionUtils.getField(EntityPlayer, "ping", "field_71138_i"); // 1.5.2 - 1.16.5, 1.7.10 Thermos
+            }
+        } catch (Exception e) {
+            Bukkit.getConsoleSender().sendMessage(EnumChatFormat.RED.getFormat() + "[TAB] Failed to initialize NMS fields for " +
+                    "getting player's ping due to a compatibility error. This will " +
+                    "result in ping showing \"-1\". " +
+                    "Please update the plugin a to version with native support for your server version to properly show ping.");
+        }
+    }
+
+    @SneakyThrows
+    public static int getPing(@NotNull Player player) {
+        if (BukkitReflection.getMinorVersion() >= 17) {
+            return player.getPing();
+        }
+        if (PING == null) return -1;
+        return PING.getInt(getHandle.invoke(player));
+    }
+}

bukkit/src/main/java/me/neznamy/tab/platforms/bukkit/nms/datawatcher/DataWatcher.java

@@ -1,89 +0,0 @@
-package me.neznamy.tab.platforms.bukkit.nms.datawatcher;
-
-import lombok.Getter;
-import lombok.SneakyThrows;
-import lombok.ToString;
-import me.neznamy.tab.platforms.bukkit.nms.storage.nms.NMSStorage;
-import me.neznamy.tab.shared.backend.EntityData;
-import me.neznamy.tab.shared.util.ReflectionUtils;
-import org.jetbrains.annotations.NotNull;
-
-import java.lang.reflect.Constructor;
-import java.lang.reflect.Method;
-import java.util.HashMap;
-import java.util.Map;
-
-/**
- * A class representing the n.m.s.DataWatcher class to make work with it much easier
- */
-@ToString
-public class DataWatcher implements EntityData {
-
-    /** NMS Fields */
-    public static Class<?> CLASS;
-    private static Constructor<?> CONSTRUCTOR;
-    private static Method REGISTER;
-    public static Method markDirty;
-    public static Method packDirty;
-    
-    /** Watched data */
-    private final Map<Integer, DataWatcherItem> dataValues = new HashMap<>();
-
-    /** Helper for easier data write */
-    @Getter private final DataWatcherHelper helper = new DataWatcherHelper(this);
-
-    /**
-     * Loads all required Fields and throws Exception if something went wrong
-     *
-     * @param   nms
-     *          NMS storage reference
-     */
-    public static void load(NMSStorage nms) throws NoSuchMethodException {
-        CONSTRUCTOR = ReflectionUtils.getOnlyConstructor(CLASS);
-        if (nms.getMinorVersion() >= 9) {
-            REGISTER = ReflectionUtils.getMethod(CLASS, new String[]{"register", "a"}, DataWatcherObject.CLASS, Object.class); // {Bukkit, Bukkit 1.18+}
-        } else {
-            REGISTER = ReflectionUtils.getMethod(CLASS, new String[]{"func_75682_a", "a"}, int.class, Object.class); // {Thermos 1.7.10, Bukkit}
-        }
-        if (nms.getMinorVersion() >= 19) {
-            packDirty = CLASS.getMethod("b");
-        }
-        if (nms.is1_19_3Plus()) {
-            markDirty = ReflectionUtils.getOnlyMethod(CLASS, void.class, DataWatcherObject.CLASS);
-        }
-    }
-    
-    /**
-     * Sets value into data values
-     *
-     * @param   type
-     *          type of value
-     * @param   value
-     *          value
-     */
-    public void setValue(@NotNull DataWatcherObject type, @NotNull Object value) {
-        dataValues.put(type.getPosition(), new DataWatcherItem(type, value));
-    }
-
-    /**
-     * Converts the class into an instance of NMS.DataWatcher
-     *
-     * @return  an instance of NMS.DataWatcher with same data
-     */
-    @SneakyThrows
-    public @NotNull Object build() {
-        NMSStorage nms = NMSStorage.getInstance();
-        Object nmsWatcher;
-        if (CONSTRUCTOR.getParameterCount() == 1) { //1.7+
-            nmsWatcher = CONSTRUCTOR.newInstance(new Object[] {null});
-        } else {
-            nmsWatcher = CONSTRUCTOR.newInstance();
-        }
-        for (DataWatcherItem item : dataValues.values()) {
-            Object nmsObject = item.getType().build();
-            REGISTER.invoke(nmsWatcher, nmsObject, item.getValue());
-            if (nms.is1_19_3Plus()) markDirty.invoke(nmsWatcher, nmsObject);
-        }
-        return nmsWatcher;
-    }
-}

bukkit/src/main/java/me/neznamy/tab/platforms/bukkit/nms/datawatcher/DataWatcherHelper.java

@@ -1,160 +0,0 @@
-package me.neznamy.tab.platforms.bukkit.nms.datawatcher;
-
-import lombok.AllArgsConstructor;
-import me.neznamy.tab.shared.ProtocolVersion;
-import me.neznamy.tab.shared.chat.IChatBaseComponent;
-import me.neznamy.tab.platforms.bukkit.nms.storage.nms.NMSStorage;
-import me.neznamy.tab.shared.TAB;
-import org.jetbrains.annotations.NotNull;
-
-import java.util.Optional;
-
-/**
- * A class to help to assign DataWatcher items as positions often change per-version
- */
-@AllArgsConstructor
-public class DataWatcherHelper {
-
-    /** NMS Fields */
-    public static Class<?> DataWatcherRegistry;
-    public static Class<?> DataWatcherSerializer;
-    public static Object DataWatcherSerializer_BYTE;
-    public static Object DataWatcherSerializer_FLOAT;
-    public static Object DataWatcherSerializer_STRING;
-    public static Object DataWatcherSerializer_OPTIONAL_COMPONENT;
-    public static Object DataWatcherSerializer_BOOLEAN;
-
-    /** Instance fields */
-    private final int armorStandFlagsPosition = getArmorStandFlagsPosition();
-    @NotNull private final DataWatcher data;
-
-    /**
-     * Returns armor stand flags position based on server version
-     *
-     * @return  armor stand flags position based on server version
-     */
-    private int getArmorStandFlagsPosition() {
-        if (TAB.getInstance().getServerVersion().getMinorVersion() >= 17) {
-            //1.17.x, 1.18.x, 1.19.x
-            return 15;
-        } else if (TAB.getInstance().getServerVersion().getMinorVersion() >= 15) {
-            //1.15.x, 1.16.x
-            return 14;
-        } else if (TAB.getInstance().getServerVersion().getMinorVersion() >= 14) {
-            //1.14.x
-            return 13;
-        } else if (TAB.getInstance().getServerVersion().getMinorVersion() >= 10) {
-            //1.10.x - 1.13.x
-            return 11;
-        } else {
-            //1.8.x - 1.9.x
-            return 10;
-        }
-    }
-
-    public static void load(NMSStorage nms) throws NoSuchFieldException, IllegalAccessException {
-        if (nms.getMinorVersion() < 9) return;
-        DataWatcherSerializer_BYTE = DataWatcherRegistry.getDeclaredField("a").get(null);
-        DataWatcherSerializer_FLOAT = DataWatcherRegistry.getDeclaredField("c").get(null);
-        DataWatcherSerializer_STRING = DataWatcherRegistry.getDeclaredField("d").get(null);
-        if (nms.is1_19_3Plus()) {
-            DataWatcherSerializer_OPTIONAL_COMPONENT = DataWatcherRegistry.getDeclaredField("g").get(null);
-            if (nms.is1_19_4Plus()) {
-                DataWatcherSerializer_BOOLEAN = DataWatcherRegistry.getDeclaredField("k").get(null);
-            } else {
-                DataWatcherSerializer_BOOLEAN = DataWatcherRegistry.getDeclaredField("j").get(null);
-            }
-        } else {
-            if (nms.getMinorVersion() >= 13) {
-                DataWatcherSerializer_OPTIONAL_COMPONENT = DataWatcherRegistry.getDeclaredField("f").get(null);
-                DataWatcherSerializer_BOOLEAN = DataWatcherRegistry.getDeclaredField("i").get(null);
-            } else {
-                DataWatcherSerializer_BOOLEAN = DataWatcherRegistry.getDeclaredField("h").get(null);
-            }
-        }
-    }
-
-    /**
-     * Writes entity byte flags
-     *
-     * @param   flags
-     *          flags to write
-     */
-    public void setEntityFlags(byte flags) {
-        data.setValue(new DataWatcherObject(0, DataWatcherSerializer_BYTE), flags);
-    }
-
-    /**
-     * Writes entity custom name with position based on server version and value depending on client version (RGB or not)
-     *
-     * @param   customName
-     *          target custom name
-     * @param   clientVersion
-     *          client version
-     */
-    public void setCustomName(@NotNull String customName, @NotNull ProtocolVersion clientVersion) {
-        if (TAB.getInstance().getServerVersion().getMinorVersion() >= 13) {
-            data.setValue(new DataWatcherObject(2, DataWatcherSerializer_OPTIONAL_COMPONENT),
-                    Optional.ofNullable(NMSStorage.getInstance().toNMSComponent(IChatBaseComponent.optimizedComponent(customName), clientVersion)));
-        } else if (TAB.getInstance().getServerVersion().getMinorVersion() >= 8) {
-            data.setValue(new DataWatcherObject(2, DataWatcherSerializer_STRING), customName);
-        } else {
-            //name length is limited to 64 characters on <1.8
-            String cutName = (customName.length() > 64 ? customName.substring(0, 64) : customName);
-            if (TAB.getInstance().getServerVersion().getMinorVersion() >= 6) {
-                data.setValue(new DataWatcherObject(10, null), cutName);
-            } else {
-                data.setValue(new DataWatcherObject(5, null), cutName);
-            }
-        }
-    }
-
-    /**
-     * Writes custom name visibility boolean
-     *
-     * @param   visible
-     *          if visible or not
-     */
-    public void setCustomNameVisible(boolean visible) {
-        if (TAB.getInstance().getServerVersion().getMinorVersion() >= 9) {
-            data.setValue(new DataWatcherObject(3, DataWatcherSerializer_BOOLEAN), visible);
-        } else {
-            data.setValue(new DataWatcherObject(3, null), (byte)(visible?1:0));
-        }
-    }
-
-    /**
-     * Writes entity health
-     *
-     * @param   health
-     *          health of entity
-     */
-    public void setHealth(float health) {
-        if (TAB.getInstance().getServerVersion().getMinorVersion() >= 6) {
-            data.setValue(new DataWatcherObject(6, DataWatcherSerializer_FLOAT), health);
-        } else {
-            data.setValue(new DataWatcherObject(16, null), (int)health);
-        }
-    }
-
-    /**
-     * Writes armor stand flags
-     *
-     * @param   flags
-     *          flags to write
-     */
-    public void setArmorStandFlags(byte flags) {
-        data.setValue(new DataWatcherObject(armorStandFlagsPosition, DataWatcherSerializer_BYTE), flags);
-    }
-
-    /**
-     * Writes wither invulnerable time
-     * @param   time
-     *          Time, apparently
-     */
-    public void setWitherInvulnerableTime(int time) {
-        if (TAB.getInstance().getServerVersion().getMinorVersion() > 8)
-            throw new UnsupportedOperationException("Not supported on 1.9+");
-        data.setValue(new DataWatcherObject(20, null), time);
-    }
-}

bukkit/src/main/java/me/neznamy/tab/platforms/bukkit/nms/datawatcher/DataWatcherItem.java

@@ -1,39 +0,0 @@
-package me.neznamy.tab.platforms.bukkit.nms.datawatcher;
-
-import lombok.Data;
-import me.neznamy.tab.platforms.bukkit.nms.storage.nms.NMSStorage;
-import me.neznamy.tab.shared.util.ReflectionUtils;
-import org.jetbrains.annotations.NotNull;
-
-import java.lang.reflect.Field;
-
-/**
- * Class representing NMS Data Watcher Item
- */
-@Data
-public class DataWatcherItem {
-
-    /** NMS Fields */
-    public static Class<?> CLASS;
-    public static Field TYPE;
-    public static Field VALUE;
-
-    /** Instance fields */
-    @NotNull private final DataWatcherObject type;
-    @NotNull private final Object value;
-
-    /**
-     * Loads all required Fields
-     *
-     * @param   nms
-     *          NMS storage reference
-     */
-    public static void load(NMSStorage nms) {
-        VALUE = ReflectionUtils.getFields(CLASS, Object.class).get(0);
-        if (nms.getMinorVersion() >= 9) {
-            TYPE = ReflectionUtils.getOnlyField(CLASS, DataWatcherObject.CLASS);
-        } else {
-            TYPE = ReflectionUtils.getFields(CLASS, int.class).get(1);
-        }
-    }
-}

bukkit/src/main/java/me/neznamy/tab/platforms/bukkit/nms/datawatcher/DataWatcherObject.java

@@ -1,54 +0,0 @@
-package me.neznamy.tab.platforms.bukkit.nms.datawatcher;
-
-import lombok.AllArgsConstructor;
-import lombok.Data;
-import lombok.SneakyThrows;
-import me.neznamy.tab.platforms.bukkit.nms.storage.nms.NMSStorage;
-import me.neznamy.tab.shared.util.ReflectionUtils;
-import org.jetbrains.annotations.Nullable;
-
-import java.lang.reflect.Constructor;
-import java.lang.reflect.Field;
-
-/**
- * A class representing the n.m.s.DataWatcherObject class to make work with it much easier
- */
-@Data @AllArgsConstructor
-public class DataWatcherObject {
-
-    /** NMS Fields */
-    public static Class<?> CLASS;
-    public static Constructor<?> CONSTRUCTOR;
-    public static Field SLOT;
-    public static Field SERIALIZER;
-    
-    /** Instance fields */
-    private final int position;
-    @Nullable private final Object serializer;
-
-    /**
-     * Loads all required Fields and throws Exception if something went wrong
-     *
-     * @throws  NoSuchMethodException
-     *          If something fails
-     */
-    public static void load() throws NoSuchMethodException {
-        CONSTRUCTOR = CLASS.getConstructor(int.class, DataWatcherHelper.DataWatcherSerializer);
-        SLOT = ReflectionUtils.getOnlyField(CLASS, int.class);
-        SERIALIZER = ReflectionUtils.getOnlyField(CLASS, DataWatcherHelper.DataWatcherSerializer);
-    }
-
-    /**
-     * Converts the object into NMS object
-     *
-     * @return  NMS object
-     */
-    @SneakyThrows
-    public Object build() {
-        if (NMSStorage.getInstance().getMinorVersion() >= 9) {
-            return DataWatcherObject.CONSTRUCTOR.newInstance(position, serializer);
-        } else {
-            return position;
-        }
-    }
-}

bukkit/src/main/java/me/neznamy/tab/platforms/bukkit/nms/storage/nms/BukkitLegacyNMSStorage.java

@@ -1,109 +0,0 @@
-package me.neznamy.tab.platforms.bukkit.nms.storage.nms;
-
-import me.neznamy.tab.platforms.bukkit.BukkitTabList;
-import me.neznamy.tab.platforms.bukkit.nms.datawatcher.DataWatcher;
-import me.neznamy.tab.platforms.bukkit.nms.datawatcher.DataWatcherHelper;
-import me.neznamy.tab.platforms.bukkit.nms.datawatcher.DataWatcherItem;
-import me.neznamy.tab.platforms.bukkit.nms.datawatcher.DataWatcherObject;
-import me.neznamy.tab.platforms.bukkit.nms.storage.packet.*;
-import me.neznamy.tab.platforms.bukkit.scoreboard.PacketScoreboard;
-import org.jetbrains.annotations.NotNull;
-
-import java.util.Arrays;
-
-/**
- * NMS loader for Minecraft 1.5.2 - 1.16.5 using Bukkit mapping.
- */
-@SuppressWarnings({"unchecked", "rawtypes"})
-public class BukkitLegacyNMSStorage extends NMSStorage {
-
-    /**
-     * Returns class with given potential names in same order
-     *
-     * @param   names
-     *          possible class names
-     * @return  class for specified names
-     * @throws  ClassNotFoundException
-     *          if class does not exist
-     */
-    private Class<?> getLegacyClass(@NotNull String... names) throws ClassNotFoundException {
-        for (String name : names) {
-            try {
-                return getLegacyClass(name);
-            } catch (ClassNotFoundException e) {
-                //not the first class name in array
-            }
-        }
-        throw new ClassNotFoundException("No class found with possible names " + Arrays.toString(names));
-    }
-
-    /**
-     * Returns class from given name. Supports modded servers, such as Thermos.
-     *
-     * @param   name
-     *          class name
-     * @return  class from given name
-     * @throws  ClassNotFoundException
-     *          if class was not found
-     */
-    public Class<?> getLegacyClass(@NotNull String name) throws ClassNotFoundException {
-        try {
-            return getClass().getClassLoader().loadClass("net.minecraft.server." + serverPackage + "." + name);
-        } catch (NullPointerException e) {
-            // nested class not found
-            throw new ClassNotFoundException(name);
-        }
-    }
-
-    @Override
-    public void loadClasses() throws ClassNotFoundException {
-        EntityHuman = getLegacyClass("EntityHuman");
-        World = getLegacyClass("World");
-        Packet = getLegacyClass("Packet");
-        EnumChatFormat = (Class<Enum>) getLegacyClass("EnumChatFormat");
-        EntityPlayer = getLegacyClass("EntityPlayer");
-        Entity = getLegacyClass("Entity");
-        EntityLiving = getLegacyClass("EntityLiving");
-        PlayerConnection = getLegacyClass("PlayerConnection");
-        NetworkManager = getLegacyClass("NetworkManager");
-        DataWatcher.CLASS = getLegacyClass("DataWatcher");
-        DataWatcherItem.CLASS = getLegacyClass("DataWatcher$Item", "DataWatcher$WatchableObject", "WatchableObject");
-        PacketPlayOutSpawnEntityLivingStorage.CLASS = getLegacyClass("PacketPlayOutSpawnEntityLiving", "Packet24MobSpawn");
-        PacketPlayOutEntityTeleportStorage.CLASS = getLegacyClass("PacketPlayOutEntityTeleport", "Packet34EntityTeleport");
-        PacketPlayOutEntity = getLegacyClass("PacketPlayOutEntity", "Packet30Entity");
-        PacketPlayOutEntityDestroyStorage.CLASS = getLegacyClass("PacketPlayOutEntityDestroy", "Packet29DestroyEntity");
-        PacketPlayOutEntityLook = getLegacyClass("PacketPlayOutEntity$PacketPlayOutEntityLook", "PacketPlayOutEntityLook", "Packet32EntityLook");
-        PacketPlayOutEntityMetadataStorage.CLASS = getLegacyClass("PacketPlayOutEntityMetadata", "Packet40EntityMetadata");
-        PacketPlayOutNamedEntitySpawn = getLegacyClass("PacketPlayOutNamedEntitySpawn", "Packet20NamedEntitySpawn");
-        PacketScoreboard.DisplayObjectiveClass = getLegacyClass("PacketPlayOutScoreboardDisplayObjective", "Packet208SetScoreboardDisplayObjective");
-        PacketScoreboard.ObjectivePacketClass = getLegacyClass("PacketPlayOutScoreboardObjective", "Packet206SetScoreboardObjective");
-        PacketScoreboard.TeamPacketClass = getLegacyClass("PacketPlayOutScoreboardTeam", "Packet209SetScoreboardTeam");
-        PacketScoreboard.ScorePacketClass = getLegacyClass("PacketPlayOutScoreboardScore", "Packet207SetScoreboardScore");
-        PacketScoreboard.Scoreboard = getLegacyClass("Scoreboard");
-        PacketScoreboard.ScoreboardObjective = getLegacyClass("ScoreboardObjective");
-        PacketScoreboard.ScoreboardScoreClass = getLegacyClass("ScoreboardScore");
-        PacketScoreboard.IScoreboardCriteria = getLegacyClass("IScoreboardCriteria", "IObjective"); // 1.5.1+, 1.5
-        PacketScoreboard.ScoreboardTeam = getLegacyClass("ScoreboardTeam");
-        if (minorVersion >= 7) {
-            IChatBaseComponent = getLegacyClass("IChatBaseComponent");
-            ChatSerializer = getLegacyClass("IChatBaseComponent$ChatSerializer", "ChatSerializer");
-        }
-        if (minorVersion >= 8) {
-            BukkitTabList.PacketPlayOutPlayerListHeaderFooterClass = getLegacyClass("PacketPlayOutPlayerListHeaderFooter");
-            EntityArmorStand = getLegacyClass("EntityArmorStand");
-            BukkitTabList.PacketPlayOutPlayerInfoClass = getLegacyClass("PacketPlayOutPlayerInfo");
-            BukkitTabList.EnumPlayerInfoActionClass = (Class<Enum>) getLegacyClass("PacketPlayOutPlayerInfo$EnumPlayerInfoAction", "EnumPlayerInfoAction");
-            BukkitTabList.PlayerInfoDataClass = getLegacyClass("PacketPlayOutPlayerInfo$PlayerInfoData", "PlayerInfoData");
-            BukkitTabList.EnumGamemodeClass = (Class<Enum>) getLegacyClass("EnumGamemode", "WorldSettings$EnumGamemode");
-            PacketScoreboard.EnumScoreboardHealthDisplay = (Class<Enum>) getLegacyClass("IScoreboardCriteria$EnumScoreboardHealthDisplay", "EnumScoreboardHealthDisplay");
-            PacketScoreboard.EnumScoreboardAction = (Class<Enum>) getLegacyClass("ScoreboardServer$Action", "PacketPlayOutScoreboardScore$EnumScoreboardAction", "EnumScoreboardAction");
-            PacketScoreboard.EnumNameTagVisibility = (Class<Enum>) getLegacyClass("ScoreboardTeamBase$EnumNameTagVisibility", "EnumNameTagVisibility");
-        }
-        if (minorVersion >= 9) {
-            DataWatcherObject.CLASS = getLegacyClass("DataWatcherObject");
-            DataWatcherHelper.DataWatcherRegistry = getLegacyClass("DataWatcherRegistry");
-            DataWatcherHelper.DataWatcherSerializer = getLegacyClass("DataWatcherSerializer");
-            PacketScoreboard.EnumTeamPush = (Class<Enum>) getLegacyClass("ScoreboardTeamBase$EnumTeamPush");
-        }
-    }
-}

bukkit/src/main/java/me/neznamy/tab/platforms/bukkit/nms/storage/nms/BukkitModernNMSStorage.java

@@ -1,72 +0,0 @@
-package me.neznamy.tab.platforms.bukkit.nms.storage.nms;
-
-import me.neznamy.tab.platforms.bukkit.BukkitTabList;
-import me.neznamy.tab.platforms.bukkit.nms.datawatcher.DataWatcher;
-import me.neznamy.tab.platforms.bukkit.nms.datawatcher.DataWatcherHelper;
-import me.neznamy.tab.platforms.bukkit.nms.datawatcher.DataWatcherItem;
-import me.neznamy.tab.platforms.bukkit.nms.datawatcher.DataWatcherObject;
-import me.neznamy.tab.platforms.bukkit.nms.storage.packet.*;
-import me.neznamy.tab.platforms.bukkit.scoreboard.PacketScoreboard;
-
-/**
- * NMS loader for minecraft 1.17+ using Mojang packaging and bukkit names.
- */
-@SuppressWarnings({"unchecked", "rawtypes"})
-public class BukkitModernNMSStorage extends NMSStorage {
-
-    @Override
-    public void loadClasses() throws ClassNotFoundException {
-        ChatSerializer = Class.forName("net.minecraft.network.chat.IChatBaseComponent$ChatSerializer");
-        World = Class.forName("net.minecraft.world.level.World");
-        EntityArmorStand = Class.forName("net.minecraft.world.entity.decoration.EntityArmorStand");
-        EntityHuman = Class.forName("net.minecraft.world.entity.player.EntityHuman");
-        NetworkManager = Class.forName("net.minecraft.network.NetworkManager");
-        IChatBaseComponent = Class.forName("net.minecraft.network.chat.IChatBaseComponent");
-        Packet = Class.forName("net.minecraft.network.protocol.Packet");
-        EnumChatFormat = (Class<Enum>) Class.forName("net.minecraft.EnumChatFormat");
-        EntityPlayer = Class.forName("net.minecraft.server.level.EntityPlayer");
-        Entity = Class.forName("net.minecraft.world.entity.Entity");
-        EntityLiving = Class.forName("net.minecraft.world.entity.EntityLiving");
-        PlayerConnection = Class.forName("net.minecraft.server.network.PlayerConnection");
-        BukkitTabList.PacketPlayOutPlayerListHeaderFooterClass = Class.forName("net.minecraft.network.protocol.game.PacketPlayOutPlayerListHeaderFooter");
-        PacketScoreboard.DisplayObjectiveClass = Class.forName("net.minecraft.network.protocol.game.PacketPlayOutScoreboardDisplayObjective");
-        PacketScoreboard.ObjectivePacketClass = Class.forName("net.minecraft.network.protocol.game.PacketPlayOutScoreboardObjective");
-        PacketScoreboard.Scoreboard = Class.forName("net.minecraft.world.scores.Scoreboard");
-        PacketScoreboard.ScorePacketClass = Class.forName("net.minecraft.network.protocol.game.PacketPlayOutScoreboardScore");
-        PacketScoreboard.ScoreboardObjective = Class.forName("net.minecraft.world.scores.ScoreboardObjective");
-        PacketScoreboard.ScoreboardScoreClass = Class.forName("net.minecraft.world.scores.ScoreboardScore");
-        PacketScoreboard.IScoreboardCriteria = Class.forName("net.minecraft.world.scores.criteria.IScoreboardCriteria");
-        PacketScoreboard.EnumScoreboardHealthDisplay = (Class<Enum>) Class.forName("net.minecraft.world.scores.criteria.IScoreboardCriteria$EnumScoreboardHealthDisplay");
-        PacketScoreboard.EnumScoreboardAction = (Class<Enum>) Class.forName("net.minecraft.server.ScoreboardServer$Action");
-        PacketScoreboard.TeamPacketClass = Class.forName("net.minecraft.network.protocol.game.PacketPlayOutScoreboardTeam");
-        PacketScoreboard.ScoreboardTeam = Class.forName("net.minecraft.world.scores.ScoreboardTeam");
-        PacketScoreboard.EnumNameTagVisibility = (Class<Enum>) Class.forName("net.minecraft.world.scores.ScoreboardTeamBase$EnumNameTagVisibility");
-        PacketScoreboard.EnumTeamPush = (Class<Enum>) Class.forName("net.minecraft.world.scores.ScoreboardTeamBase$EnumTeamPush");
-        DataWatcher.CLASS = Class.forName("net.minecraft.network.syncher.DataWatcher");
-        DataWatcherItem.CLASS = Class.forName("net.minecraft.network.syncher.DataWatcher$Item");
-        DataWatcherObject.CLASS = Class.forName("net.minecraft.network.syncher.DataWatcherObject");
-        DataWatcherHelper.DataWatcherRegistry = Class.forName("net.minecraft.network.syncher.DataWatcherRegistry");
-        DataWatcherHelper.DataWatcherSerializer = Class.forName("net.minecraft.network.syncher.DataWatcherSerializer");
-        PacketPlayOutEntityTeleportStorage.CLASS = Class.forName("net.minecraft.network.protocol.game.PacketPlayOutEntityTeleport");
-        PacketPlayOutEntity = Class.forName("net.minecraft.network.protocol.game.PacketPlayOutEntity");
-        PacketPlayOutEntityDestroyStorage.CLASS = Class.forName("net.minecraft.network.protocol.game.PacketPlayOutEntityDestroy");
-        PacketPlayOutEntityLook = Class.forName("net.minecraft.network.protocol.game.PacketPlayOutEntity$PacketPlayOutEntityLook");
-        PacketPlayOutEntityMetadataStorage.CLASS = Class.forName("net.minecraft.network.protocol.game.PacketPlayOutEntityMetadata");
-        PacketPlayOutNamedEntitySpawn = Class.forName("net.minecraft.network.protocol.game.PacketPlayOutNamedEntitySpawn");
-        BukkitTabList.EnumGamemodeClass = (Class<Enum>) Class.forName("net.minecraft.world.level.EnumGamemode");
-        PacketPlayOutSpawnEntityLivingStorage.Vec3D = Class.forName("net.minecraft.world.phys.Vec3D");
-        PacketPlayOutSpawnEntityLivingStorage.EntityTypes = Class.forName("net.minecraft.world.entity.EntityTypes");
-        PacketPlayOutSpawnEntityLivingStorage.CLASS = Class.forName("net.minecraft.network.protocol.game.PacketPlayOutSpawnEntity");
-        if (is1_19_3Plus()) {
-            BukkitTabList.ClientboundPlayerInfoRemovePacket = Class.forName("net.minecraft.network.protocol.game.ClientboundPlayerInfoRemovePacket");
-            BukkitTabList.PacketPlayOutPlayerInfoClass = Class.forName("net.minecraft.network.protocol.game.ClientboundPlayerInfoUpdatePacket");
-            BukkitTabList.EnumPlayerInfoActionClass = (Class<Enum>) Class.forName("net.minecraft.network.protocol.game.ClientboundPlayerInfoUpdatePacket$a");
-            BukkitTabList.PlayerInfoDataClass = Class.forName("net.minecraft.network.protocol.game.ClientboundPlayerInfoUpdatePacket$b");
-            BukkitTabList.RemoteChatSession$Data = Class.forName("net.minecraft.network.chat.RemoteChatSession$a");
-        } else {
-            BukkitTabList.PacketPlayOutPlayerInfoClass = Class.forName("net.minecraft.network.protocol.game.PacketPlayOutPlayerInfo");
-            BukkitTabList.EnumPlayerInfoActionClass = (Class<Enum>) Class.forName("net.minecraft.network.protocol.game.PacketPlayOutPlayerInfo$EnumPlayerInfoAction");
-            BukkitTabList.PlayerInfoDataClass = Class.forName("net.minecraft.network.protocol.game.PacketPlayOutPlayerInfo$PlayerInfoData");
-        }
-    }
-}

bukkit/src/main/java/me/neznamy/tab/platforms/bukkit/nms/storage/nms/NMSStorage.java

@@ -1,159 +0,0 @@
-package me.neznamy.tab.platforms.bukkit.nms.storage.nms;
-
-import com.mojang.authlib.GameProfile;
-import io.netty.channel.Channel;
-import lombok.Getter;
-import lombok.Setter;
-import lombok.SneakyThrows;
-import me.neznamy.tab.platforms.bukkit.BukkitTabList;
-import me.neznamy.tab.platforms.bukkit.nms.datawatcher.DataWatcherHelper;
-import me.neznamy.tab.platforms.bukkit.scoreboard.PacketScoreboard;
-import me.neznamy.tab.shared.ProtocolVersion;
-import me.neznamy.tab.shared.chat.IChatBaseComponent;
-import me.neznamy.tab.shared.util.ComponentCache;
-import me.neznamy.tab.shared.util.ReflectionUtils;
-import me.neznamy.tab.platforms.bukkit.nms.datawatcher.DataWatcher;
-import me.neznamy.tab.platforms.bukkit.nms.datawatcher.DataWatcherItem;
-import me.neznamy.tab.platforms.bukkit.nms.datawatcher.DataWatcherObject;
-import me.neznamy.tab.platforms.bukkit.nms.storage.packet.*;
-import org.bukkit.Bukkit;
-import org.jetbrains.annotations.NotNull;
-import org.jetbrains.annotations.Nullable;
-
-import java.lang.reflect.Constructor;
-import java.lang.reflect.Field;
-import java.lang.reflect.Method;
-
-/**
- * Class holding all NMS classes, methods, fields and constructors used by TAB.
- */
-@SuppressWarnings("rawtypes")
-public abstract class NMSStorage {
-
-    /** Instance of this class */
-    @Getter @Setter private static NMSStorage instance;
-
-    /** Server's NMS/CraftBukkit package */
-    @Getter protected final String serverPackage = Bukkit.getServer().getClass().getPackage().getName().split("\\.")[3];
-
-    /** Server's minor version */
-    @Getter protected final int minorVersion = Integer.parseInt(serverPackage.split("_")[1]);
-
-    /** Flag determining whether the server version is at least 1.19.3 or not */
-    @Getter private final boolean is1_19_3Plus = ReflectionUtils.classExists("net.minecraft.network.protocol.game.ClientboundPlayerInfoUpdatePacket");
-    @Getter private final boolean is1_19_4Plus = is1_19_3Plus && !serverPackage.equals("v1_19_R2");
-
-    /** Basic universal values */
-    protected Class<?> Packet;
-    protected Class<?> NetworkManager;
-    protected Class<?> EntityArmorStand;
-    protected Class<?> World;
-    public Class<Enum> EnumChatFormat;
-    public Class<?> EntityPlayer;
-    protected Class<?> EntityHuman;
-    public Class<?> Entity;
-    public Class<?> EntityLiving;
-    protected Class<?> PlayerConnection;
-
-    // Ping field for 1.5.2 - 1.16.5, 1.17+ has Player#getPing()
-    public Field PING;
-
-    public Field PLAYER_CONNECTION;
-    public Field NETWORK_MANAGER;
-    public Field CHANNEL;
-    public Method getHandle;
-    public Method sendPacket;
-    public Method getProfile;
-
-    /** Chat components */
-    public Class<?> IChatBaseComponent;
-    protected Class<?> ChatSerializer;
-    public Method ChatSerializer_DESERIALIZE;
-
-    /** Other entity packets */
-    public Class<?> PacketPlayOutEntity;
-    public Field PacketPlayOutEntity_ENTITYID;
-
-    public Class<?> PacketPlayOutEntityLook;
-
-    public Class<?> PacketPlayOutNamedEntitySpawn;
-    public Field PacketPlayOutNamedEntitySpawn_ENTITYID;
-
-    public Object dummyEntity;
-
-    private final ComponentCache<IChatBaseComponent, Object> componentCache = new ComponentCache<>(10000,
-            (component, clientVersion) -> ChatSerializer_DESERIALIZE.invoke(null, component.toString(clientVersion)));
-
-    /**
-     * Constructs new instance and attempts to load all fields, methods and constructors.
-     */
-    @SneakyThrows
-    public NMSStorage() {
-        ProtocolVersion.UNKNOWN_SERVER_VERSION.setMinorVersion(minorVersion); //fixing compatibility with forks that set version field value to "Unknown"
-        loadClasses();
-        if (minorVersion >= 7) {
-            NETWORK_MANAGER = ReflectionUtils.getOnlyField(PlayerConnection, NetworkManager);
-            sendPacket = ReflectionUtils.getMethods(PlayerConnection, void.class, Packet).get(0);
-        } else {
-            sendPacket = ReflectionUtils.getMethod(PlayerConnection, new String[]{"sendPacket"}, Packet);
-        }
-        if (minorVersion >= 8) {
-            ChatSerializer_DESERIALIZE = ChatSerializer.getMethod("a", String.class);
-            CHANNEL = ReflectionUtils.getOnlyField(NetworkManager, Channel.class);
-            try {
-                getProfile = ReflectionUtils.getOnlyMethod(EntityHuman, GameProfile.class);
-            } catch (IllegalStateException catServer) {
-                getProfile = EntityHuman.getMethod("getProfile");
-            }
-            Constructor<?> newEntityArmorStand = EntityArmorStand.getConstructor(World, double.class, double.class, double.class);
-            Method World_getHandle = Class.forName("org.bukkit.craftbukkit." + serverPackage + ".CraftWorld").getMethod("getHandle");
-            dummyEntity = newEntityArmorStand.newInstance(World_getHandle.invoke(Bukkit.getWorlds().get(0)), 0, 0, 0);
-            BukkitTabList.load(this);
-        }
-        if (minorVersion >= 9) {
-            DataWatcherObject.load();
-        }
-        PLAYER_CONNECTION = ReflectionUtils.getOnlyField(EntityPlayer, PlayerConnection);
-        getHandle = Class.forName("org.bukkit.craftbukkit." + serverPackage + ".entity.CraftPlayer").getMethod("getHandle");
-        DataWatcher.load(this);
-        DataWatcherItem.load(this);
-        DataWatcherHelper.load(this);
-        PacketPlayOutEntityDestroyStorage.load();
-        PacketPlayOutEntityMetadataStorage.load(this);
-        PacketPlayOutEntityTeleportStorage.load(this);
-        PacketPlayOutSpawnEntityLivingStorage.load(this);
-        PacketScoreboard.load(this);
-        PacketPlayOutEntity_ENTITYID = ReflectionUtils.getFields(PacketPlayOutEntity, int.class).get(0);
-        PacketPlayOutNamedEntitySpawn_ENTITYID = ReflectionUtils.getFields(PacketPlayOutNamedEntitySpawn, int.class).get(0);
-        if (minorVersion < 17) {
-            try {
-                (PING = EntityPlayer.getDeclaredField("ping")).setAccessible(true); // 1.5.2 - 1.16.5
-            } catch (NoSuchFieldException e) {
-                (PING = EntityPlayer.getDeclaredField("field_71138_i")).setAccessible(true); // 1.7.10 Thermos
-            }
-        }
-    }
-
-    /**
-     * Loads all classes used by the plugin
-     *
-     * @throws  ClassNotFoundException
-     *          If a class was not found
-     */
-    public abstract void loadClasses() throws ClassNotFoundException;
-
-    /**
-     * Converts TAB's IChatBaseComponent into minecraft's component using String deserialization.
-     * If the requested component is found in cache, it is returned. If not, it is created, added into cache and returned.
-     * If {@code component} is {@code null}, returns {@code null}
-     *
-     * @param   component
-     *          component to convert
-     * @param   clientVersion
-     *          client version used to decide RGB conversion
-     * @return  converted component or {@code null} if {@code component} is {@code null}
-     */
-    public @Nullable Object toNMSComponent(@NotNull IChatBaseComponent component, @NotNull ProtocolVersion clientVersion) {
-        return componentCache.get(component, clientVersion);
-    }
-}

bukkit/src/main/java/me/neznamy/tab/platforms/bukkit/nms/storage/packet/PacketPlayOutEntityDestroyStorage.java

@@ -1,33 +0,0 @@
-package me.neznamy.tab.platforms.bukkit.nms.storage.packet;
-
-import me.neznamy.tab.shared.util.ReflectionUtils;
-
-import java.lang.reflect.Constructor;
-import java.lang.reflect.Field;
-
-/**
- * Custom class for holding data used in PacketPlayOutEntityDestroy minecraft packet.
- */
-public class PacketPlayOutEntityDestroyStorage {
-
-    /** NMS Fields */
-    public static Class<?> CLASS;
-    public static Constructor<?> CONSTRUCTOR;
-    public static Field ENTITIES;
-
-    /**
-     * Loads all required Fields and throws Exception if something went wrong
-     *
-     * @throws  NoSuchMethodException
-     *          If something fails
-     */
-    public static void load() throws NoSuchMethodException {
-        ENTITIES = ReflectionUtils.getOnlyField(CLASS);
-        try {
-            CONSTRUCTOR = CLASS.getConstructor(int[].class);
-        } catch (NoSuchMethodException e) {
-            //1.17.0
-            CONSTRUCTOR = CLASS.getConstructor(int.class);
-        }
-    }
-}

bukkit/src/main/java/me/neznamy/tab/platforms/bukkit/nms/storage/packet/PacketPlayOutEntityMetadataStorage.java

@@ -1,33 +0,0 @@
-package me.neznamy.tab.platforms.bukkit.nms.storage.packet;
-
-import me.neznamy.tab.platforms.bukkit.nms.datawatcher.DataWatcher;
-import me.neznamy.tab.platforms.bukkit.nms.storage.nms.NMSStorage;
-
-import java.lang.reflect.Constructor;
-import java.util.List;
-
-/**
- * Custom class for holding data used in PacketPlayOutEntityMetadata minecraft packet.
- */
-public class PacketPlayOutEntityMetadataStorage {
-
-    /** NMS Fields */
-    public static Class<?> CLASS;
-    public static Constructor<?> CONSTRUCTOR;
-
-    /**
-     * Loads all required Fields and throws Exception if something went wrong
-     *
-     * @param   nms
-     *          NMS storage reference
-     * @throws  NoSuchMethodException
-     *          If something fails
-     */
-    public static void load(NMSStorage nms) throws NoSuchMethodException {
-        if (nms.is1_19_3Plus()) {
-            CONSTRUCTOR = CLASS.getConstructor(int.class, List.class);
-        } else {
-            CONSTRUCTOR = CLASS.getConstructor(int.class, DataWatcher.CLASS, boolean.class);
-        }
-    }
-}

bukkit/src/main/java/me/neznamy/tab/platforms/bukkit/nms/storage/packet/PacketPlayOutEntityTeleportStorage.java

@@ -1,87 +0,0 @@
-package me.neznamy.tab.platforms.bukkit.nms.storage.packet;
-
-import lombok.SneakyThrows;
-import me.neznamy.tab.platforms.bukkit.nms.storage.nms.NMSStorage;
-import me.neznamy.tab.shared.backend.Location;
-import me.neznamy.tab.shared.util.ReflectionUtils;
-
-import java.lang.reflect.Constructor;
-import java.lang.reflect.Field;
-
-/**
- * Custom class for holding data used in PacketPlayOutEntityTeleport minecraft packet.
- */
-public class PacketPlayOutEntityTeleportStorage {
-
-    /** NMS Fields */
-    public static Class<?> CLASS;
-    public static Constructor<?> CONSTRUCTOR;
-    public static Field ENTITY_ID;
-    public static Field X;
-    public static Field Y;
-    public static Field Z;
-    public static Field YAW;
-    public static Field PITCH;
-
-    /**
-     * Loads all required Fields and throws Exception if something went wrong
-     *
-     * @param   nms
-     *          NMS storage reference
-     * @throws  NoSuchMethodException
-     *          If something fails
-     */
-    public static void load(NMSStorage nms) throws NoSuchMethodException {
-        ENTITY_ID = ReflectionUtils.getFields(CLASS, int.class).get(0);
-        YAW = ReflectionUtils.getFields(CLASS, byte.class).get(0);
-        PITCH = ReflectionUtils.getFields(CLASS, byte.class).get(1);
-        if (nms.getMinorVersion() >= 17) {
-            CONSTRUCTOR = CLASS.getConstructor(nms.Entity);
-        } else {
-            CONSTRUCTOR = CLASS.getConstructor();
-        }
-        if (nms.getMinorVersion() >= 9) {
-            X = ReflectionUtils.getFields(CLASS, double.class).get(0);
-            Y = ReflectionUtils.getFields(CLASS, double.class).get(1);
-            Z = ReflectionUtils.getFields(CLASS, double.class).get(2);
-        } else {
-            X = ReflectionUtils.getFields(CLASS, int.class).get(1);
-            Y = ReflectionUtils.getFields(CLASS, int.class).get(2);
-            Z = ReflectionUtils.getFields(CLASS, int.class).get(3);
-        }
-    }
-
-    /**
-     * Converts this class into NMS packet
-     *
-     * @return  NMS packet
-     */
-    @SneakyThrows
-    public static Object build(int entityId, Location location) {
-        NMSStorage nms = NMSStorage.getInstance();
-        Object nmsPacket;
-        if (nms.getMinorVersion() >= 17) {
-            nmsPacket = CONSTRUCTOR.newInstance(nms.dummyEntity);
-        } else {
-            nmsPacket = CONSTRUCTOR.newInstance();
-        }
-        ENTITY_ID.set(nmsPacket, entityId);
-        if (nms.getMinorVersion() >= 9) {
-            X.set(nmsPacket, location.getX());
-            Y.set(nmsPacket, location.getY());
-            Z.set(nmsPacket, location.getZ());
-        } else {
-            X.set(nmsPacket, floor(location.getX()*32));
-            Y.set(nmsPacket, floor(location.getY()*32));
-            Z.set(nmsPacket, floor(location.getZ()*32));
-        }
-        YAW.set(nmsPacket, (byte) (location.getYaw()/360*256));
-        PITCH.set(nmsPacket, (byte) (location.getPitch()/360*256));
-        return nmsPacket;
-    }
-
-    private static int floor(double paramDouble) {
-        int i = (int)paramDouble;
-        return paramDouble < i ? i - 1 : i;
-    }
-}

bukkit/src/main/java/me/neznamy/tab/platforms/bukkit/nms/storage/packet/PacketPlayOutSpawnEntityLivingStorage.java

@@ -1,131 +0,0 @@
-package me.neznamy.tab.platforms.bukkit.nms.storage.packet;
-
-import lombok.SneakyThrows;
-import me.neznamy.tab.platforms.bukkit.nms.datawatcher.DataWatcher;
-import me.neznamy.tab.platforms.bukkit.nms.storage.nms.NMSStorage;
-import me.neznamy.tab.shared.backend.EntityData;
-import me.neznamy.tab.shared.backend.Location;
-import me.neznamy.tab.shared.util.ReflectionUtils;
-import org.bukkit.entity.EntityType;
-
-import java.lang.reflect.Constructor;
-import java.lang.reflect.Field;
-import java.util.EnumMap;
-import java.util.UUID;
-
-/**
- * Custom class for holding data used in PacketPlayOutSpawnEntityLiving minecraft packet.
- */
-public class PacketPlayOutSpawnEntityLivingStorage {
-
-    /** NMS Fields */
-    public static Class<?> CLASS;
-    public static Constructor<?> CONSTRUCTOR;
-
-    /** 1.17+ */
-    public static Class<?> Vec3D;
-    public static Class<?> EntityTypes;
-    public static Object Vec3D_Empty;
-    public static Object EntityTypes_ARMOR_STAND;
-
-    /** 1.16.5- */
-    public static Field ENTITY_ID;
-    public static Field ENTITY_TYPE;
-    public static Field YAW;
-    public static Field PITCH;
-    public static Field UUID;
-    public static Field X;
-    public static Field Y;
-    public static Field Z;
-    public static Field DATA_WATCHER;
-    public static final EnumMap<EntityType, Integer> entityIds = new EnumMap<>(EntityType.class);
-
-    /**
-     * Loads all required Fields and throws Exception if something went wrong
-     *
-     * @param   nms
-     *          NMS storage reference
-     * @throws  NoSuchMethodException
-     *          If something fails
-     */
-    public static void load(NMSStorage nms) throws NoSuchMethodException, IllegalAccessException, NoSuchFieldException {
-        int minorVersion = nms.getMinorVersion();
-        if (minorVersion >= 13) {
-            entityIds.put(EntityType.ARMOR_STAND, 1);
-        } else {
-            entityIds.put(EntityType.WITHER, 64);
-            if (minorVersion >= 8) {
-                entityIds.put(EntityType.ARMOR_STAND, 30);
-            }
-        }
-
-        if (minorVersion >= 19) {
-            EntityTypes_ARMOR_STAND = EntityTypes.getDeclaredField("d").get(null);
-            CONSTRUCTOR = CLASS.getConstructor(int.class, UUID.class, double.class, double.class, double.class, float.class, float.class, EntityTypes, int.class, Vec3D, double.class);
-            Vec3D_Empty = ReflectionUtils.getOnlyField(Vec3D, Vec3D).get(null);
-        } else if (minorVersion >= 17) {
-            EntityTypes_ARMOR_STAND = EntityTypes.getDeclaredField("c").get(null);
-            CONSTRUCTOR = CLASS.getConstructor(int.class, UUID.class, double.class, double.class, double.class, float.class, float.class, EntityTypes, int.class, Vec3D);
-            Vec3D_Empty = ReflectionUtils.getOnlyField(Vec3D, Vec3D).get(null);
-        } else {
-            CONSTRUCTOR = CLASS.getConstructor();
-            ENTITY_ID = ReflectionUtils.getFields(CLASS, int.class).get(0);
-            YAW = ReflectionUtils.getFields(CLASS, byte.class).get(0);
-            PITCH = ReflectionUtils.getFields(CLASS, byte.class).get(1);
-            if (minorVersion >= 9) {
-                UUID = ReflectionUtils.getOnlyField(CLASS, UUID.class);
-                X = ReflectionUtils.getFields(CLASS, double.class).get(0);
-                Y = ReflectionUtils.getFields(CLASS, double.class).get(1);
-                Z = ReflectionUtils.getFields(CLASS, double.class).get(2);
-            } else {
-                X = ReflectionUtils.getFields(CLASS, int.class).get(2);
-                Y = ReflectionUtils.getFields(CLASS, int.class).get(3);
-                Z = ReflectionUtils.getFields(CLASS, int.class).get(4);
-            }
-            ENTITY_TYPE = ReflectionUtils.getFields(CLASS, int.class).get(1);
-            if (minorVersion <= 14) {
-                DATA_WATCHER = ReflectionUtils.getOnlyField(CLASS, DataWatcher.CLASS);
-            }
-        }
-    }
-
-    /**
-     * Converts this class into NMS packet
-     *
-     * @return  NMS packet
-     */
-    @SneakyThrows
-    public static Object build(int id, UUID uuid, Object entityType, Location l, EntityData data) {
-        int minorVersion = NMSStorage.getInstance().getMinorVersion();
-        if (minorVersion >= 19) {
-            return CONSTRUCTOR.newInstance(id, uuid, l.getX(), l.getY(), l.getZ(), l.getYaw(), l.getPitch(), EntityTypes_ARMOR_STAND, 0, Vec3D_Empty, 0d);
-        }
-        if (minorVersion >= 17) {
-            return CONSTRUCTOR.newInstance(id, uuid, l.getX(), l.getY(), l.getZ(), l.getYaw(), l.getPitch(), EntityTypes_ARMOR_STAND, 0, Vec3D_Empty);
-        }
-        Object nmsPacket = CONSTRUCTOR.newInstance();
-        ENTITY_ID.set(nmsPacket, id);
-        YAW.set(nmsPacket, (byte)(l.getYaw() * 256.0f / 360.0f));
-        PITCH.set(nmsPacket, (byte)(l.getPitch() * 256.0f / 360.0f));
-        if (minorVersion <= 14) {
-            DATA_WATCHER.set(nmsPacket, data.build());
-        }
-        if (minorVersion >= 9) {
-            UUID.set(nmsPacket, uuid);
-            X.set(nmsPacket, l.getX());
-            Y.set(nmsPacket, l.getY());
-            Z.set(nmsPacket, l.getZ());
-        } else {
-            X.set(nmsPacket, floor(l.getX()*32));
-            Y.set(nmsPacket, floor(l.getY()*32));
-            Z.set(nmsPacket, floor(l.getZ()*32));
-        }
-        ENTITY_TYPE.set(nmsPacket, entityIds.get((EntityType) entityType));
-        return nmsPacket;
-    }
-
-    private static int floor(double paramDouble) {
-        int i = (int)paramDouble;
-        return paramDouble < i ? i - 1 : i;
-    }
-}

bukkit/src/main/java/me/neznamy/tab/platforms/bukkit/platform/BukkitPlatform.java

@@ -1,24 +1,26 @@
 package me.neznamy.tab.platforms.bukkit.platform;
 
+import de.myzelyam.api.vanish.VanishAPI;
 import lombok.Getter;
-import lombok.RequiredArgsConstructor;
-import lombok.Setter;
 import lombok.SneakyThrows;
 import me.clip.placeholderapi.PlaceholderAPI;
-import me.neznamy.tab.platforms.bukkit.BukkitPipelineInjector;
-import me.neznamy.tab.platforms.bukkit.BukkitPlaceholderRegistry;
-import me.neznamy.tab.platforms.bukkit.BukkitTabPlayer;
+import me.neznamy.tab.platforms.bukkit.*;
+import me.neznamy.tab.platforms.bukkit.header.HeaderFooter;
+import me.neznamy.tab.platforms.bukkit.nms.BukkitReflection;
+import me.neznamy.tab.platforms.bukkit.nms.PacketSender;
+import me.neznamy.tab.platforms.bukkit.nms.PingRetriever;
+import me.neznamy.tab.platforms.bukkit.scoreboard.ScoreboardLoader;
 import me.neznamy.tab.shared.GroupManager;
+import me.neznamy.tab.shared.ProtocolVersion;
 import me.neznamy.tab.shared.TabConstants;
+import me.neznamy.tab.shared.chat.EnumChatFormat;
 import me.neznamy.tab.shared.chat.IChatBaseComponent;
-import me.neznamy.tab.shared.chat.rgb.RGBUtils;
 import me.neznamy.tab.shared.features.injection.PipelineInjector;
 import me.neznamy.tab.shared.features.types.TabFeature;
 import me.neznamy.tab.platforms.bukkit.features.BukkitTabExpansion;
 import me.neznamy.tab.platforms.bukkit.features.PerWorldPlayerList;
 import me.neznamy.tab.platforms.bukkit.features.WitherBossBar;
 import me.neznamy.tab.platforms.bukkit.features.BukkitNameTagX;
-import me.neznamy.tab.platforms.bukkit.nms.storage.nms.NMSStorage;
 import me.neznamy.tab.shared.TAB;
 import me.neznamy.tab.shared.backend.BackendPlatform;
 import me.neznamy.tab.shared.features.PlaceholderManagerImpl;
@@ -28,9 +30,14 @@ import me.neznamy.tab.shared.hook.LuckPermsHook;
 import me.neznamy.tab.shared.placeholders.PlayerPlaceholderImpl;
 import me.neznamy.tab.shared.placeholders.expansion.EmptyTabExpansion;
 import me.neznamy.tab.shared.placeholders.expansion.TabExpansion;
+import me.neznamy.tab.shared.platform.TabPlayer;
 import me.neznamy.tab.shared.util.ReflectionUtils;
+import net.milkbowl.vault.chat.Chat;
 import net.milkbowl.vault.permission.Permission;
+import org.bstats.bukkit.Metrics;
+import org.bstats.charts.SimplePie;
 import org.bukkit.Bukkit;
+import org.bukkit.command.PluginCommand;
 import org.bukkit.entity.Entity;
 import org.bukkit.entity.Player;
 import org.bukkit.plugin.RegisteredServiceProvider;
@@ -38,50 +45,115 @@ import org.bukkit.plugin.java.JavaPlugin;
 import org.jetbrains.annotations.NotNull;
 import org.jetbrains.annotations.Nullable;
 
-import java.util.Collection;
+import java.io.File;
+import java.lang.reflect.Field;
 
 /**
  * Implementation of Platform interface for Bukkit platform
  */
-@RequiredArgsConstructor
 @Getter
 public class BukkitPlatform implements BackendPlatform {
 
-    /** Plugin instance for registering tasks and events */
+    /** Flag tracking plugin presence */
+    private final boolean premiumVanish = Bukkit.getPluginManager().isPluginEnabled("PremiumVanish");
+
+    /**
+     * Plugin instance for registering tasks and events
+     */
+    @NotNull
     private final JavaPlugin plugin;
 
-    /** Variables checking presence of other plugins to hook into */
+    /**
+     * Variables checking presence of other plugins to hook into
+     */
     private final boolean placeholderAPI = ReflectionUtils.classExists("me.clip.placeholderapi.PlaceholderAPI");
-    @Setter private boolean libsDisguisesEnabled = ReflectionUtils.classExists("me.libraryaddict.disguise.DisguiseAPI");
 
-    public @NotNull BossBarManagerImpl getLegacyBossBar() {
+    /**
+     * NMS server to get TPS from on spigot
+     */
+    @Nullable
+    private Object server;
+
+    /**
+     * TPS field
+     */
+    @Nullable
+    private Field spigotTps;
+
+    /**
+     * Detection for presence of Paper's TPS getter
+     */
+    private final boolean paperTps = ReflectionUtils.methodExists(Bukkit.class, "getTPS");
+
+    /**
+     * Detection for presence of Paper's MSPT getter
+     */
+    private final boolean paperMspt = ReflectionUtils.methodExists(Bukkit.class, "getAverageTickTime");
+
+    public BukkitPlatform(@NotNull JavaPlugin plugin) {
+        this.plugin = plugin;
+        try {
+            server = Bukkit.getServer().getClass().getMethod("getServer").invoke(Bukkit.getServer());
+            spigotTps = server.getClass().getField("recentTps");
+        } catch (ReflectiveOperationException e) {
+            //not spigot
+        }
+        PingRetriever.tryLoad();
+        PacketSender.tryLoad();
+        ScoreboardLoader.findInstance();
+        if (BukkitReflection.getMinorVersion() >= 8) {
+            BukkitPipelineInjector.tryLoad();
+            HeaderFooter.findInstance();
+        }
+    }
+
+    @Override
+    @NotNull
+    public BossBarManagerImpl getLegacyBossBar() {
         return new WitherBossBar(plugin);
     }
 
     @Override
     public void loadPlayers() {
-        for (Player p : getOnlinePlayers()) {
-            TAB.getInstance().addPlayer(new BukkitTabPlayer(p));
+        for (Player p : BukkitUtils.getOnlinePlayers()) {
+            TAB.getInstance().addPlayer(new BukkitTabPlayer(this, p));
         }
     }
 
     @Override
     public void registerPlaceholders() {
-        new BukkitPlaceholderRegistry().registerPlaceholders(TAB.getInstance().getPlaceholderManager());
+        PlaceholderManagerImpl manager = TAB.getInstance().getPlaceholderManager();
+        manager.registerServerPlaceholder("%vault-prefix%", -1, () -> "");
+        manager.registerServerPlaceholder("%vault-suffix%", -1, () -> "");
+        if (Bukkit.getPluginManager().isPluginEnabled("Vault")) {
+            RegisteredServiceProvider<Chat> rspChat = Bukkit.getServicesManager().getRegistration(Chat.class);
+            if (rspChat != null) {
+                Chat chat = rspChat.getProvider();
+                manager.registerPlayerPlaceholder("%vault-prefix%", 1000, p -> chat.getPlayerPrefix((Player) p.getPlayer()));
+                manager.registerPlayerPlaceholder("%vault-suffix%", 1000, p -> chat.getPlayerSuffix((Player) p.getPlayer()));
+            }
+        }
+        // Override for the PAPI placeholder to prevent console errors on unsupported server versions when ping field changes
+        manager.registerPlayerPlaceholder("%player_ping%", manager.getRefreshInterval("%player_ping%"),
+                p -> ((TabPlayer) p).getPing());
+        BackendPlatform.super.registerPlaceholders();
     }
 
     @Override
-    public @Nullable PipelineInjector createPipelineInjector() {
-        return NMSStorage.getInstance().getMinorVersion() >= 8 ? new BukkitPipelineInjector() : null;
+    @Nullable
+    public PipelineInjector createPipelineInjector() {
+        return BukkitReflection.getMinorVersion() >= 8 && BukkitPipelineInjector.isAvailable() ? new BukkitPipelineInjector() : null;
     }
 
     @Override
-    public @NotNull NameTag getUnlimitedNameTags() {
-        return new BukkitNameTagX(plugin);
+    @NotNull
+    public NameTag getUnlimitedNameTags() {
+        return BukkitReflection.getMinorVersion() >= 8 ? new BukkitNameTagX(plugin) : new NameTag();
     }
 
     @Override
-    public @NotNull TabExpansion createTabExpansion() {
+    @NotNull
+    public TabExpansion createTabExpansion() {
         if (placeholderAPI) {
             BukkitTabExpansion expansion = new BukkitTabExpansion();
             expansion.register();
@@ -91,73 +163,108 @@ public class BukkitPlatform implements BackendPlatform {
     }
 
     @Override
-    public @Nullable TabFeature getPerWorldPlayerList() {
+    @Nullable
+    public TabFeature getPerWorldPlayerList() {
         return new PerWorldPlayerList(plugin);
     }
 
-    /**
-     * Returns online players from Bukkit API
-     *
-     * @return  online players from Bukkit API
-     */
-    @SuppressWarnings("unchecked")
-    @SneakyThrows
-    private @NotNull Player[] getOnlinePlayers() {
-        Object players = Bukkit.class.getMethod("getOnlinePlayers").invoke(null);
-        if (players instanceof Player[]) {
-            //1.7-
-            return (Player[]) players;
-        } else {
-            //1.8+
-            return ((Collection<Player>)players).toArray(new Player[0]);
-        }
-    }
-
     @Override
     public void registerUnknownPlaceholder(@NotNull String identifier) {
+        if (!placeholderAPI) {
+            registerDummyPlaceholder(identifier);
+            return;
+        }
         PlaceholderManagerImpl pl = TAB.getInstance().getPlaceholderManager();
         int refresh = pl.getRefreshInterval(identifier);
         if (identifier.startsWith("%rel_")) {
             //relational placeholder
             TAB.getInstance().getPlaceholderManager().registerRelationalPlaceholder(identifier, pl.getRefreshInterval(identifier), (viewer, target) ->
-                    placeholderAPI ? PlaceholderAPI.setRelationalPlaceholders((Player) viewer.getPlayer(), (Player) target.getPlayer(), identifier) : identifier);
+                    PlaceholderAPI.setRelationalPlaceholders((Player) viewer.getPlayer(), (Player) target.getPlayer(), identifier));
         } else if (identifier.startsWith("%sync:")) {
             registerSyncPlaceholder(identifier, refresh);
         } else if (identifier.startsWith("%server_")) {
-            TAB.getInstance().getPlaceholderManager().registerServerPlaceholder(identifier, refresh, () ->
-                    placeholderAPI ? PlaceholderAPI.setPlaceholders(null, identifier) : identifier);
+            TAB.getInstance().getPlaceholderManager().registerServerPlaceholder(identifier, refresh,
+                    () -> PlaceholderAPI.setPlaceholders(null, identifier));
         } else {
-            TAB.getInstance().getPlaceholderManager().registerPlayerPlaceholder(identifier, refresh, p ->
-                    placeholderAPI ? PlaceholderAPI.setPlaceholders((Player) p.getPlayer(), identifier) : identifier);
+            TAB.getInstance().getPlaceholderManager().registerPlayerPlaceholder(identifier, refresh,
+                    p -> PlaceholderAPI.setPlaceholders((Player) p.getPlayer(), identifier));
         }
     }
 
-    public void registerSyncPlaceholder(String identifier, int refresh) {
+    public void registerSyncPlaceholder(@NotNull String identifier, int refresh) {
         String syncedPlaceholder = "%" + identifier.substring(6);
         PlayerPlaceholderImpl[] ppl = new PlayerPlaceholderImpl[1];
         ppl[0] = TAB.getInstance().getPlaceholderManager().registerPlayerPlaceholder(identifier, refresh, p -> {
             Bukkit.getScheduler().runTask(plugin, () -> {
                 long time = System.nanoTime();
                 ppl[0].updateValue(p, placeholderAPI ? PlaceholderAPI.setPlaceholders((Player) p.getPlayer(), syncedPlaceholder) : identifier);
-                TAB.getInstance().getCPUManager().addPlaceholderTime(identifier, System.nanoTime()-time);
+                TAB.getInstance().getCPUManager().addPlaceholderTime(identifier, System.nanoTime() - time);
             });
             return null;
         });
     }
 
     @Override
-    public void sendConsoleMessage(@NotNull IChatBaseComponent message) {
-        Bukkit.getConsoleSender().sendMessage("[TAB] " + RGBUtils.getInstance().convertToBukkitFormat(message.toFlatText(),
-                TAB.getInstance().getServerVersion().getMinorVersion() >= 16));
+    public void logInfo(@NotNull IChatBaseComponent message) {
+        Bukkit.getConsoleSender().sendMessage("[TAB] " + BukkitUtils.toBukkitFormat(message, true));
     }
 
     @Override
+    public void logWarn(@NotNull IChatBaseComponent message) {
+        Bukkit.getConsoleSender().sendMessage(EnumChatFormat.RED.getFormat() + "[TAB] [WARN] " + BukkitUtils.toBukkitFormat(message, true));
+    }
+
+    @Override
+    @NotNull
     public String getServerVersionInfo() {
-        return "[Bukkit] " + Bukkit.getName() + " - " + Bukkit.getBukkitVersion().split("-")[0] + " (" + NMSStorage.getInstance().getServerPackage() + ")";
+        return "[Bukkit] " + Bukkit.getName() + " - " +
+                Bukkit.getBukkitVersion().split("-")[0] +
+                " (" + Bukkit.getServer().getClass().getPackage().getName().split("\\.")[3] + ")";
     }
 
     @Override
-    @NotNull public GroupManager detectPermissionPlugin() {
+    public void registerListener() {
+        Bukkit.getPluginManager().registerEvents(new BukkitEventListener(), plugin);
+    }
+
+    @Override
+    public void registerCommand() {
+        PluginCommand command = Bukkit.getPluginCommand(TabConstants.COMMAND_BACKEND);
+        if (command != null) {
+            BukkitTabCommand cmd = new BukkitTabCommand();
+            command.setExecutor(cmd);
+            command.setTabCompleter(cmd);
+        } else {
+            logWarn(new IChatBaseComponent("Failed to register command, is it defined in plugin.yml?"));
+        }
+    }
+
+    @Override
+    public void startMetrics() {
+        Metrics metrics = new Metrics(plugin, 5304);
+        metrics.addCustomChart(new SimplePie(TabConstants.MetricsChart.UNLIMITED_NAME_TAG_MODE_ENABLED,
+                () -> TAB.getInstance().getFeatureManager().isFeatureEnabled(TabConstants.Feature.UNLIMITED_NAME_TAGS) ? "Yes" : "No"));
+        metrics.addCustomChart(new SimplePie(TabConstants.MetricsChart.PERMISSION_SYSTEM,
+                () -> TAB.getInstance().getGroupManager().getPermissionPlugin()));
+        metrics.addCustomChart(new SimplePie(TabConstants.MetricsChart.SERVER_VERSION,
+                () -> "1." + BukkitReflection.getMinorVersion() + ".x"));
+    }
+
+    @Override
+    @NotNull
+    public ProtocolVersion getServerVersion() {
+        return ProtocolVersion.fromFriendlyName(Bukkit.getBukkitVersion().split("-")[0]);
+    }
+
+    @Override
+    @NotNull
+    public File getDataFolder() {
+        return plugin.getDataFolder();
+    }
+
+    @Override
+    @NotNull
+    public GroupManager detectPermissionPlugin() {
         if (LuckPermsHook.getInstance().isInstalled()) {
             return new GroupManager("LuckPerms", LuckPermsHook.getInstance().getGroupFunction());
         }
@@ -170,7 +277,40 @@ public class BukkitPlatform implements BackendPlatform {
         return new GroupManager("None", p -> TabConstants.NO_GROUP);
     }
 
-    public void runEntityTask(Entity entity, Runnable task) {
+    @Override
+    @SneakyThrows
+    public double getTPS() {
+        if (paperTps) {
+            return Bukkit.getTPS()[0];
+        } else if (spigotTps != null) {
+            return ((double[]) spigotTps.get(server))[0];
+        } else {
+            return -1;
+        }
+    }
+
+    @Override
+    public double getMSPT() {
+        if (paperMspt) return Bukkit.getAverageTickTime();
+        return -1;
+    }
+
+    public void runSync(@NotNull Entity entity, @NotNull Runnable task) {
+        Bukkit.getScheduler().runTask(plugin, task);
+    }
+
+    public void runEntityTask(@NotNull Entity entity, @NotNull Runnable task) {
         task.run();
     }
+
+    @Override
+    public boolean canSee(@NotNull TabPlayer viewer, @NotNull TabPlayer target) {
+        Player bViewer = ((BukkitTabPlayer)viewer).getPlayer();
+        Player bTarget = ((BukkitTabPlayer)target).getPlayer();
+
+        //noinspection ConstantConditions
+        if (premiumVanish && VanishAPI.canSee(bViewer, bTarget)) return true;
+        if (bViewer.canSee(bTarget)) return true;
+        return BackendPlatform.super.canSee(viewer, target);
+    }
 }

bukkit/src/main/java/me/neznamy/tab/platforms/bukkit/platform/FoliaPlatform.java

@@ -5,6 +5,7 @@ import me.clip.placeholderapi.PlaceholderAPI;
 import me.neznamy.tab.platforms.bukkit.features.PerWorldPlayerList;
 import me.neznamy.tab.shared.TAB;
 import me.neznamy.tab.shared.TabConstants;
+import me.neznamy.tab.shared.chat.IChatBaseComponent;
 import me.neznamy.tab.shared.placeholders.PlayerPlaceholderImpl;
 import me.neznamy.tab.shared.platform.TabPlayer;
 import org.bukkit.entity.Entity;
@@ -12,6 +13,7 @@ import org.bukkit.entity.Player;
 import org.bukkit.event.player.PlayerChangedWorldEvent;
 import org.bukkit.plugin.Plugin;
 import org.bukkit.plugin.java.JavaPlugin;
+import org.jetbrains.annotations.NotNull;
 
 import java.util.function.Consumer;
 
@@ -20,7 +22,7 @@ import java.util.function.Consumer;
  */
 public class FoliaPlatform extends BukkitPlatform {
 
-    public FoliaPlatform(JavaPlugin plugin) {
+    public FoliaPlatform(@NotNull JavaPlugin plugin) {
         super(plugin);
     }
 
@@ -29,8 +31,8 @@ public class FoliaPlatform extends BukkitPlatform {
         super.loadPlayers();
 
         // Values are never updated in the API, warn users
-        TAB.getInstance().sendConsoleMessage("&cFolia never updates MSPT and TPS values in the API, making " +
-                "%mspt% and %tps% return the default values (0 and 20).", true);
+        logWarn(new IChatBaseComponent("Folia never updates MSPT and TPS values in the API, making " +
+                "%mspt% and %tps% return the default values (0 and 20)."));
 
         // Folia never calls PlayerChangedWorldEvent, this is a workaround
         TAB.getInstance().getCPUManager().startRepeatingMeasuredTask(100, "Folia compatibility", "Refreshing world", () -> {
@@ -48,7 +50,7 @@ public class FoliaPlatform extends BukkitPlatform {
     }
 
     @Override
-    public void registerSyncPlaceholder(String identifier, int refresh) {
+    public void registerSyncPlaceholder(@NotNull String identifier, int refresh) {
         String syncedPlaceholder = "%" + identifier.substring(6);
         PlayerPlaceholderImpl[] ppl = new PlayerPlaceholderImpl[1];
         ppl[0] = TAB.getInstance().getPlaceholderManager().registerPlayerPlaceholder(identifier, refresh, p -> {
@@ -72,9 +74,10 @@ public class FoliaPlatform extends BukkitPlatform {
      * @param   task
      *          Task to run
      */
+    @Override
     @SneakyThrows
     @SuppressWarnings("JavaReflectionMemberAccess")
-    private void runSync(Entity entity, Runnable task) {
+    public void runSync(@NotNull Entity entity, @NotNull Runnable task) {
         Object entityScheduler = Entity.class.getMethod("getScheduler").invoke(entity);
         Consumer<?> consumer = $ -> task.run(); // Reflection and lambdas don't go together
         entityScheduler.getClass().getMethod("run", Plugin.class, Consumer.class, Runnable.class)
@@ -82,7 +85,7 @@ public class FoliaPlatform extends BukkitPlatform {
     }
 
     @Override
-    public void runEntityTask(Entity entity, Runnable task) {
+    public void runEntityTask(@NotNull Entity entity, @NotNull Runnable task) {
         runSync(entity, task);
     }
 }

bukkit/src/main/java/me/neznamy/tab/platforms/bukkit/scoreboard/BukkitScoreboard.java

@@ -0,0 +1,268 @@
+package me.neznamy.tab.platforms.bukkit.scoreboard;
+
+import lombok.Getter;
+import lombok.SneakyThrows;
+import me.neznamy.tab.platforms.bukkit.BukkitTabPlayer;
+import me.neznamy.tab.platforms.bukkit.BukkitUtils;
+import me.neznamy.tab.platforms.bukkit.nms.BukkitReflection;
+import me.neznamy.tab.shared.Limitations;
+import me.neznamy.tab.shared.ProtocolVersion;
+import me.neznamy.tab.shared.TAB;
+import me.neznamy.tab.shared.chat.EnumChatFormat;
+import me.neznamy.tab.shared.chat.IChatBaseComponent;
+import me.neznamy.tab.shared.platform.Scoreboard;
+import me.neznamy.tab.shared.util.ReflectionUtils;
+import org.bukkit.Bukkit;
+import org.bukkit.ChatColor;
+import org.bukkit.scoreboard.*;
+import org.jetbrains.annotations.NotNull;
+import org.jetbrains.annotations.Nullable;
+
+import java.util.Collection;
+import java.util.concurrent.CountDownLatch;
+
+/**
+ * Scoreboard implementation using Bukkit API (1.5.2+). It has several issues:
+ * #1 - Limitations on legacy versions are forced in the API.
+ *      While this may not seem like a problem, it enforces those
+ *      limits even for 1.13+ players (if using ViaVersion).<p>
+ * #2 - Modern versions no longer have any limits, but md_5
+ *      decided to add some random limits for absolutely no reason
+ *      at all. Scoreboard title received a random 128 characters
+ *      limit including color codes. Together with the almighty bukkit
+ *      RGB format using 14 characters for 1 color code, this makes
+ *      gradients just impossible to use. Team prefix/suffix also
+ *      received a 64 characters limit (excluding color codes at least),
+ *      however that might not be enough for displaying a line of text
+ *      in sidebar, which would require splitting the text into prefix
+ *      and suffix, which is just begging for bugs to be introduced.<p>
+ * #3 - Other plugins can decide to put players into their own
+ *      scoreboard, automatically destroying all visuals made by the
+ *      plugin. They might also put all players into the same scoreboard,
+ *      making per-player view of teams, especially sidebar not working.<p>
+ */
+// Throw the NPE if something is not as expected, parent class should ensure it anyway
+@SuppressWarnings({"ConstantConditions", "deprecation"})
+public class BukkitScoreboard extends Scoreboard<BukkitTabPlayer> {
+
+    /** Flag tracking whether this implementation is available for use */
+    @Getter
+    private static final boolean available;
+
+    /** Array of display slots, because the Bukkit order does not match network ordinals */
+    private static org.bukkit.scoreboard.DisplaySlot[] slots;
+
+    /** Server's minor version */
+    private final int serverMinorVersion = BukkitReflection.getMinorVersion();
+
+    protected org.bukkit.scoreboard.Scoreboard scoreboard;
+
+    static {
+        available = ReflectionUtils.methodExists(Bukkit.class, "getScoreboardManager");
+        if (available) {
+            slots = new org.bukkit.scoreboard.DisplaySlot[]{
+                    org.bukkit.scoreboard.DisplaySlot.PLAYER_LIST,
+                    org.bukkit.scoreboard.DisplaySlot.SIDEBAR,
+                    org.bukkit.scoreboard.DisplaySlot.BELOW_NAME
+            };
+        }
+    }
+
+    @SneakyThrows
+    public BukkitScoreboard(@NotNull BukkitTabPlayer player) {
+        super(player);
+
+        // Put player into a different scoreboard for per-player view
+        runSync(() -> {
+            scoreboard = Bukkit.getScoreboardManager().getNewScoreboard();
+            player.getPlayer().setScoreboard(scoreboard);
+        });
+    }
+
+    @Override
+    public void setDisplaySlot0(int slot, @NotNull String objective) {
+        checkPlayerScoreboard();
+        scoreboard.getObjective(objective).setDisplaySlot(slots[slot]);
+    }
+
+    @Override
+    public void setScore0(@NotNull String objective, @NotNull String scoreHolder, int score,
+                          @Nullable IChatBaseComponent displayName, @Nullable IChatBaseComponent numberFormat) {
+        checkPlayerScoreboard();
+        if (serverMinorVersion >= 7 && TAB.getInstance().getServerVersion().getNetworkId() >= ProtocolVersion.V1_7_8.getNetworkId()) {
+            scoreboard.getObjective(objective).getScore(scoreHolder).setScore(score);
+        } else {
+            scoreboard.getObjective(objective).getScore(Bukkit.getOfflinePlayer(scoreHolder)).setScore(score);
+        }
+    }
+
+    @Override
+    public void removeScore0(@NotNull String objective, @NotNull String scoreHolder) {
+        checkPlayerScoreboard();
+        if (serverMinorVersion >= 7 && TAB.getInstance().getServerVersion().getNetworkId() >= ProtocolVersion.V1_7_8.getNetworkId()) {
+            scoreboard.resetScores(scoreHolder);
+        } else {
+            scoreboard.resetScores(Bukkit.getOfflinePlayer(scoreHolder));
+        }
+    }
+
+    @Override
+    public void registerObjective0(@NotNull String objectiveName, @NotNull String title, int display,
+                                   @Nullable IChatBaseComponent numberFormat) {
+        checkPlayerScoreboard();
+        newObjective(objectiveName, "dummy", title, display);
+    }
+
+    @Override
+    public void unregisterObjective0(@NotNull String objectiveName) {
+        checkPlayerScoreboard();
+        scoreboard.getObjective(objectiveName).unregister();
+    }
+
+    @Override
+    public void updateObjective0(@NotNull String objectiveName, @NotNull String title, int display,
+                                 @Nullable IChatBaseComponent numberFormat) {
+        checkPlayerScoreboard();
+        Objective obj = scoreboard.getObjective(objectiveName);
+        setDisplayName(obj, title);
+        if (serverMinorVersion >= 14) obj.setRenderType(RenderType.values()[display]);
+    }
+
+    @Override
+    public void registerTeam0(@NotNull String name, @NotNull String prefix, @NotNull String suffix,
+                              @NotNull NameVisibility visibility, @NotNull CollisionRule collision,
+                              @NotNull Collection<String> players, int options) {
+        checkPlayerScoreboard();
+        Team team = scoreboard.registerNewTeam(name);
+        setPrefix(team, prefix);
+        setSuffix(team, suffix);
+        if (serverMinorVersion >= 8)
+            team.setNameTagVisibility(NameTagVisibility.valueOf(visibility.name()));
+        if (serverMinorVersion >= 9)
+            team.setOption(Team.Option.COLLISION_RULE, Team.OptionStatus.values()[collision.ordinal()]);
+        if (serverMinorVersion >= 13)
+            team.setColor(ChatColor.valueOf(EnumChatFormat.lastColorsOf(prefix).name()));
+        if (serverMinorVersion >= 7 && TAB.getInstance().getServerVersion().getNetworkId() >= ProtocolVersion.V1_7_8.getNetworkId()) {
+            players.forEach(team::addEntry);
+        } else {
+            players.forEach(player -> team.addPlayer(Bukkit.getOfflinePlayer(player)));
+        }
+        team.setAllowFriendlyFire((options & 0x01) != 0);
+        team.setCanSeeFriendlyInvisibles((options & 0x02) != 0);
+    }
+
+    @Override
+    public void unregisterTeam0(@NotNull String name) {
+        checkPlayerScoreboard();
+        scoreboard.getTeam(name).unregister();
+    }
+
+    @Override
+    public void updateTeam0(@NotNull String name, @NotNull String prefix, @NotNull String suffix,
+                            @NotNull NameVisibility visibility, @NotNull CollisionRule collision, int options) {
+        checkPlayerScoreboard();
+        Team team = scoreboard.getTeam(name);
+        setPrefix(team, prefix);
+        setSuffix(team, suffix);
+        if (serverMinorVersion >= 8)
+            team.setNameTagVisibility(NameTagVisibility.valueOf(visibility.name()));
+        if (serverMinorVersion >= 9)
+            team.setOption(Team.Option.COLLISION_RULE, Team.OptionStatus.values()[collision.ordinal()]);
+        if (serverMinorVersion >= 13)
+            team.setColor(ChatColor.valueOf(EnumChatFormat.lastColorsOf(prefix).name()));
+        team.setAllowFriendlyFire((options & 0x01) != 0);
+        team.setCanSeeFriendlyInvisibles((options & 0x02) != 0);
+    }
+
+    public void newObjective(String objectiveName, String criteria, String title, int display) {
+        if (serverMinorVersion >= 14) {
+            scoreboard.registerNewObjective(
+                    objectiveName,
+                    criteria,
+                    transform(title, 128, Limitations.SCOREBOARD_TITLE_PRE_1_13),
+                    RenderType.values()[display]
+            );
+        } else {
+            setDisplayName(scoreboard.registerNewObjective(objectiveName, display == HealthDisplay.HEARTS ? "health" : "dummy"), title);
+        }
+    }
+
+    public void setDisplayName(@NotNull Objective objective, @NotNull String displayName) {
+        objective.setDisplayName(transform(displayName, 128, Limitations.SCOREBOARD_TITLE_PRE_1_13));
+    }
+
+    public void setPrefix(@NotNull Team team, @NotNull String prefix) {
+        team.setPrefix(transform(prefix, 64, Limitations.TEAM_PREFIX_SUFFIX_PRE_1_13));
+    }
+
+    public void setSuffix(@NotNull Team team, @NotNull String suffix) {
+        team.setSuffix(transform(suffix, 64, Limitations.TEAM_PREFIX_SUFFIX_PRE_1_13));
+    }
+
+    /**
+     * Transforms text into format using bukkit RGB syntax if server version is 1.16+
+     *
+     * @param   text
+     *          Text to transform
+     * @param   maxLengthModern
+     *          Maximum text length defined by bukkit API on 1.13+
+     * @param   maxLengthLegacy
+     *          Maximum text length defined by bukkit API on 1.12-
+     * @return  Converted text
+     */
+    @NotNull
+    private String transform(@NotNull String text, int maxLengthModern, int maxLengthLegacy) {
+        String transformed = BukkitUtils.toBukkitFormat(IChatBaseComponent.optimizedComponent(text), player.getVersion().getMinorVersion() >= 16);
+        if (serverMinorVersion >= 16 && maxLengthModern < 128) { // Scoreboard title is not stripping colors
+            while (ChatColor.stripColor(transformed).length() > maxLengthModern)
+                transformed = transformed.substring(0, transformed.length()-1);
+        } else if (serverMinorVersion >= 13) {
+            if (transformed.length() > maxLengthModern)
+                transformed = transformed.substring(0, maxLengthModern);
+        } else {
+            if (transformed.length() > maxLengthLegacy)
+                transformed = transformed.substring(0, maxLengthLegacy);
+        }
+        return transformed;
+    }
+
+    /**
+     * Makes sure player is in the correct scoreboard.
+     * If not, puts the player into correct scoreboard and prints
+     * a warning.
+     * The only possible reason for this to happen is another plugin
+     * putting a player into a different scoreboard.
+     * Sadly there is no efficient solution to this, which md_5 fails
+     * to understand and keeps saying you don't need packets for scoreboards.
+     */
+    @SneakyThrows
+    private void checkPlayerScoreboard() {
+        if (player.getPlayer().getScoreboard() != scoreboard) {
+            TAB.getInstance().getErrorManager().printError("Player " + player.getName() + " was in a different scoreboard " +
+                    "than expected. This means another plugin changed player's scoreboard.");
+            runSync(() -> player.getPlayer().setScoreboard(scoreboard));
+        }
+    }
+
+    /**
+     * Runs the task if in main thread. If not, submits the task and waits for the result.
+     *
+     * @param   task
+     *          Task to run
+     */
+    @SneakyThrows
+    private void runSync(@NotNull Runnable task) {
+        if (Bukkit.isPrimaryThread()) {
+            // Server thread (plugin reload)
+            task.run();
+        } else {
+            // Plugin thread (player join)
+            CountDownLatch c = new CountDownLatch(1);
+            player.getPlatform().runSync(player.getPlayer(), () -> {
+                task.run();
+                c.countDown();
+            });
+            c.await();
+        }
+    }
+}

bukkit/src/main/java/me/neznamy/tab/platforms/bukkit/scoreboard/NullScoreboard.java

@@ -0,0 +1,67 @@
+package me.neznamy.tab.platforms.bukkit.scoreboard;
+
+import me.neznamy.tab.platforms.bukkit.BukkitTabPlayer;
+import me.neznamy.tab.shared.chat.IChatBaseComponent;
+import me.neznamy.tab.shared.platform.Scoreboard;
+import org.jetbrains.annotations.NotNull;
+import org.jetbrains.annotations.Nullable;
+
+import java.util.Collection;
+
+public class NullScoreboard extends Scoreboard<BukkitTabPlayer> {
+
+    public NullScoreboard(@NotNull BukkitTabPlayer player) {
+        super(player);
+    }
+
+    @Override
+    protected void setDisplaySlot0(int slot, @NotNull String objective) {
+        // Do nothing
+    }
+
+    @Override
+    protected void setScore0(@NotNull String objective, @NotNull String scoreHolder, int score,
+                             @Nullable IChatBaseComponent displayName, @Nullable IChatBaseComponent numberFormat) {
+        // Do nothing
+    }
+
+    @Override
+    protected void removeScore0(@NotNull String objective, @NotNull String scoreHolder) {
+        // Do nothing
+    }
+
+    @Override
+    protected void registerObjective0(@NotNull String objectiveName, @NotNull String title, int display,
+                                      @Nullable IChatBaseComponent numberFormat) {
+        // Do nothing
+    }
+
+    @Override
+    protected void unregisterObjective0(@NotNull String objectiveName) {
+        // Do nothing
+    }
+
+    @Override
+    protected void updateObjective0(@NotNull String objectiveName, @NotNull String title, int display,
+                                    @Nullable IChatBaseComponent numberFormat) {
+        // Do nothing
+    }
+
+    @Override
+    protected void registerTeam0(@NotNull String name, @NotNull String prefix, @NotNull String suffix,
+                                 @NotNull NameVisibility visibility, @NotNull CollisionRule collision,
+                                 @NotNull Collection<String> players, int options) {
+        // Do nothing
+    }
+
+    @Override
+    protected void unregisterTeam0(@NotNull String name) {
+        // Do nothing
+    }
+
+    @Override
+    protected void updateTeam0(@NotNull String name, @NotNull String prefix, @NotNull String suffix,
+                               @NotNull NameVisibility visibility, @NotNull CollisionRule collision, int options) {
+        // Do nothing
+    }
+}

bukkit/src/main/java/me/neznamy/tab/platforms/bukkit/scoreboard/PacketScoreboard.java

@@ -1,14 +1,16 @@
 package me.neznamy.tab.platforms.bukkit.scoreboard;
 
+import lombok.Getter;
 import lombok.SneakyThrows;
 import me.neznamy.tab.platforms.bukkit.BukkitTabPlayer;
-import me.neznamy.tab.platforms.bukkit.nms.storage.nms.NMSStorage;
-import me.neznamy.tab.shared.TAB;
+import me.neznamy.tab.platforms.bukkit.nms.BukkitReflection;
 import me.neznamy.tab.shared.chat.EnumChatFormat;
 import me.neznamy.tab.shared.chat.IChatBaseComponent;
 import me.neznamy.tab.shared.platform.Scoreboard;
+import me.neznamy.tab.shared.util.ComponentCache;
 import me.neznamy.tab.shared.util.ReflectionUtils;
 import org.jetbrains.annotations.NotNull;
+import org.jetbrains.annotations.Nullable;
 
 import java.lang.reflect.Constructor;
 import java.lang.reflect.Field;
@@ -18,188 +20,134 @@ import java.util.List;
 
 /**
  * Scoreboard implementation for Bukkit, which uses packets
- * to send scoreboards. While md_5 keeps saying that you don't
- * need packets for scoreboards in every single spigot update,
- * this is not true. It may seem that way at first, but after
- * investigating, fatal problems are found:<p>
- * #1 - Limitations on legacy versions are forced in the API.
- *      While this may not seem like a problem, it enforces those
- *      limits even for 1.13+ players (if using ViaVersion).<p>
- * #2 - Modern versions no longer have any limits, but md_5
- *      decided to add some random limits for absolutely no reason
- *      at all. Scoreboard title received a random 128 characters
- *      limit including color codes. Together with the almighty bukkit
- *      RGB format using 14 characters for 1 color code, this makes
- *      gradients just impossible to use. Team prefix/suffix also
- *      received a 64 characters limit (excluding color codes at least),
- *      however that might not be enough for displaying a line of text
- *      in sidebar, which would require splitting the text into prefix
- *      and suffix, which is just begging for bugs to be introduced.<p>
- * #3 - Other plugins can decide to put players into their own
- *      scoreboard, automatically destroying all visuals made by the
- *      plugin. They might also put all players into the same scoreboard,
- *      making per-player view of teams, especially sidebar not working.<p>
+ * to send scoreboards to use the full potential on all versions
+ * and server software without any artificial limits.
  */
-@SuppressWarnings({"unchecked", "rawtypes"})
+@SuppressWarnings("unchecked")
 public class PacketScoreboard extends Scoreboard<BukkitTabPlayer> {
 
-    private static NMSStorage nms;
+    @Getter
+    private static boolean available;
 
-    public static Class<?> Scoreboard;
-    public static Class<?> IScoreboardCriteria;
+    private static Class<?> Component;
+    private static Class<?> Scoreboard;
+    private static Class<?> ScoreboardObjective;
     private static Object emptyScoreboard;
-    private static Field IScoreboardCriteria_self;
+    private static Class<?> NumberFormat;
+    private static Constructor<?> newFixedFormat;
 
-    // PacketPlayOutScoreboardDisplayObjective
-    public static Class<?> DisplayObjectiveClass;
-    private static Constructor<?> newDisplayObjective;
-    public static Field DisplayObjective_POSITION;
-    public static Field DisplayObjective_OBJECTIVE_NAME;
-
-    // PacketPlayOutScoreboardScore
-    public static Class<?> ScorePacketClass;
-    public static Class<?> ScoreboardScoreClass;
-    public static Class<Enum> EnumScoreboardAction;
-    private static Constructor<?> newScorePacket_1_13;
-    private static Constructor<?> newScorePacket_String;
-    private static Constructor<?> newScorePacket;
-    private static Constructor<?> newScoreboardScore;
-    public static Method ScoreboardScore_setScore;
-
-    // PacketPlayOutScoreboardObjective
+    // Objective packet
     public static Class<?> ObjectivePacketClass;
     private static Constructor<?> newObjectivePacket;
     public static Field Objective_OBJECTIVE_NAME;
     public static Field Objective_METHOD;
     private static Field Objective_RENDER_TYPE;
-    private static Field Objective_DISPLAY_NAME;
-    public static Class<Enum> EnumScoreboardHealthDisplay;
-    public static Class<?> ScoreboardObjective;
     private static Constructor<?> newScoreboardObjective;
+    private static Method ScoreboardObjective_setDisplayName;
+    private static Enum<?>[] healthDisplays;
+    private static Object IScoreboardCriteria_dummy;
 
-    // PacketPlayOutScoreboardTeamStorage
-    public static Class<?> TeamPacketClass;
-    private static Constructor<?> newTeamPacket;
-    private static Method TeamPacketConstructor_of;
-    private static Method TeamPacketConstructor_ofBoolean;
-    public static Field TeamPacket_NAME;
-    public static Field TeamPacket_ACTION;
-    public static Field TeamPacket_PLAYERS;
-    public static Class<Enum> EnumNameTagVisibility;
-    public static Class<Enum> EnumTeamPush;
-    public static Class<?> ScoreboardTeam;
-    private static Constructor<?> newScoreboardTeam;
-    private static Method ScoreboardTeam_getPlayerNameSet;
-    public static Method ScoreboardTeam_setNameTagVisibility;
-    private static Method ScoreboardTeam_setCollisionRule;
-    public static Method ScoreboardTeam_setPrefix;
-    public static Method ScoreboardTeam_setSuffix;
-    private static Method ScoreboardTeam_setColor;
-    public static Method ScoreboardTeam_setAllowFriendlyFire;
-    public static Method ScoreboardTeam_setCanSeeFriendlyInvisibles;
+    private static ScorePacketData scorePacketData;
+    public static TeamPacketData teamPacketData;
+    public static DisplayPacketData displayPacketData;
 
-    public static void load(NMSStorage nms) throws ReflectiveOperationException {
-        PacketScoreboard.nms = nms;
-        emptyScoreboard = Scoreboard.getConstructor().newInstance();
-        IScoreboardCriteria_self = ReflectionUtils.getFields(IScoreboardCriteria, IScoreboardCriteria).get(0);
-        newDisplayObjective = DisplayObjectiveClass.getConstructor(int.class, ScoreboardObjective);
-        DisplayObjective_POSITION = ReflectionUtils.getOnlyField(DisplayObjectiveClass, int.class);
-        DisplayObjective_OBJECTIVE_NAME = ReflectionUtils.getOnlyField(DisplayObjectiveClass, String.class);
-        newScoreboardObjective = ReflectionUtils.getOnlyConstructor(ScoreboardObjective);
-        Objective_OBJECTIVE_NAME = ReflectionUtils.getFields(ObjectivePacketClass, String.class).get(0);
-        List<Field> list = ReflectionUtils.getFields(ObjectivePacketClass, int.class);
-        Objective_METHOD = list.get(list.size()-1);
-        newScoreboardScore = ScoreboardScoreClass.getConstructor(Scoreboard, ScoreboardObjective, String.class);
-        newScoreboardTeam = ScoreboardTeam.getConstructor(Scoreboard, String.class);
-        TeamPacket_NAME = ReflectionUtils.getFields(TeamPacketClass, String.class).get(0);
-        TeamPacket_ACTION = ReflectionUtils.getInstanceFields(TeamPacketClass, int.class).get(0);
-        TeamPacket_PLAYERS = ReflectionUtils.getOnlyField(TeamPacketClass, Collection.class);
-        ScoreboardTeam_getPlayerNameSet = ReflectionUtils.getOnlyMethod(ScoreboardTeam, Collection.class);
-        ScoreboardScore_setScore = ReflectionUtils.getMethod(ScoreboardScoreClass, new String[] {"func_96647_c", "setScore", "b", "c"}, int.class); // {Thermos, 1.5.1 - 1.17.1, 1.18+, 1.5}
-        ScoreboardTeam_setAllowFriendlyFire = ReflectionUtils.getMethod(ScoreboardTeam, new String[] {"func_96660_a", "setAllowFriendlyFire", "a"}, boolean.class); // {Thermos, 1.5.1+, 1.5 & 1.18+}
-        ScoreboardTeam_setCanSeeFriendlyInvisibles = ReflectionUtils.getMethod(ScoreboardTeam, new String[] {"func_98300_b", "setCanSeeFriendlyInvisibles", "b"}, boolean.class); // {Thermos, 1.5.1+, 1.5 & 1.18+}
-        if (nms.getMinorVersion() >= 13) {
-            newScorePacket_1_13 = ScorePacketClass.getConstructor(EnumScoreboardAction, String.class, String.class, int.class);
+    private static Method ChatSerializer_DESERIALIZE;
+    private static final ComponentCache<IChatBaseComponent, Object> componentCache = new ComponentCache<>(1000,
+            (component, clientVersion) -> ChatSerializer_DESERIALIZE.invoke(null, component.toString(clientVersion)));
+
+    static {
+        try {
+            int minorVersion = BukkitReflection.getMinorVersion();
+            Scoreboard = BukkitReflection.getClass("world.scores.Scoreboard", "Scoreboard");
+            ScoreboardObjective = BukkitReflection.getClass("world.scores.Objective", "world.scores.ScoreboardObjective", "ScoreboardObjective");
+            Class<?> IScoreboardCriteria = BukkitReflection.getClass(
+                    "world.scores.criteria.ObjectiveCriteria", // Mojang mapped
+                    "world.scores.criteria.IScoreboardCriteria", // Bukkit 1.17.+
+                    "IScoreboardCriteria", // 1.5.1 - 1.16.5
+                    "IObjective" // 1.5.0
+            );
+            ObjectivePacketClass = BukkitReflection.getClass(
+                    "network.protocol.game.ClientboundSetObjectivePacket", // Mojang mapped
+                    "network.protocol.game.PacketPlayOutScoreboardObjective", // Bukkit 1.17+
+                    "PacketPlayOutScoreboardObjective", // 1.7 - 1.16.5
+                    "Packet206SetScoreboardObjective" // 1.5 - 1.6.4
+            );
+            emptyScoreboard = Scoreboard.getConstructor().newInstance();
+            Objective_OBJECTIVE_NAME = ReflectionUtils.getFields(ObjectivePacketClass, String.class).get(0);
+            List<Field> list = ReflectionUtils.getFields(ObjectivePacketClass, int.class);
+            Objective_METHOD = list.get(list.size()-1);
             newObjectivePacket = ObjectivePacketClass.getConstructor(ScoreboardObjective, int.class);
-            Objective_DISPLAY_NAME = ReflectionUtils.getOnlyField(ObjectivePacketClass, nms.IChatBaseComponent);
-            ScoreboardTeam_setColor = ReflectionUtils.getOnlyMethod(ScoreboardTeam, void.class, nms.EnumChatFormat);
-            ScoreboardTeam_setPrefix = ReflectionUtils.getMethod(ScoreboardTeam, new String[]{"setPrefix", "b"}, nms.IChatBaseComponent); // {1.17.1-, 1.18+}
-            ScoreboardTeam_setSuffix = ReflectionUtils.getMethod(ScoreboardTeam, new String[]{"setSuffix", "c"}, nms.IChatBaseComponent); // {1.17.1-, 1.18+}
-        } else {
-            newScorePacket_String = ScorePacketClass.getConstructor(String.class);
-            newObjectivePacket = ObjectivePacketClass.getConstructor();
-            Objective_DISPLAY_NAME = ReflectionUtils.getFields(ObjectivePacketClass, String.class).get(1);
-            ScoreboardTeam_setPrefix = ReflectionUtils.getMethod(ScoreboardTeam, new String[] {"func_96666_b", "setPrefix", "b"}, String.class); // {Thermos, 1.5.1+, 1.5}
-            ScoreboardTeam_setSuffix = ReflectionUtils.getMethod(ScoreboardTeam, new String[] {"func_96662_c", "setSuffix", "c"}, String.class); // {Thermos, 1.5.1+, 1.5}
-            if (nms.getMinorVersion() >= 8) {
-                newScorePacket = ScorePacketClass.getConstructor(ScoreboardScoreClass);
-                Objective_RENDER_TYPE = ReflectionUtils.getOnlyField(ObjectivePacketClass, EnumScoreboardHealthDisplay);
-            } else {
-                newScorePacket = ScorePacketClass.getConstructor(ScoreboardScoreClass, int.class);
+            IScoreboardCriteria_dummy = ReflectionUtils.getFields(IScoreboardCriteria, IScoreboardCriteria).get(0).get(null);
+            newScoreboardObjective = ReflectionUtils.getOnlyConstructor(ScoreboardObjective);
+            if (minorVersion >= 7) {
+                Component = BukkitReflection.getClass("network.chat.Component", "network.chat.IChatBaseComponent", "IChatBaseComponent");
+                Class<?> ChatSerializer = BukkitReflection.getClass("network.chat.Component$Serializer",
+                        "network.chat.IChatBaseComponent$ChatSerializer", "IChatBaseComponent$ChatSerializer", "ChatSerializer");
+                ChatSerializer_DESERIALIZE = ReflectionUtils.getMethods(ChatSerializer, Object.class, String.class).get(0);
             }
-        }
-        if (nms.getMinorVersion() >= 8) {
-            ScoreboardTeam_setNameTagVisibility = ReflectionUtils.getMethod(ScoreboardTeam, new String[] {"setNameTagVisibility", "a"}, EnumNameTagVisibility); // {1.8.1+, 1.8 & 1.18+}
-        }
-        if (nms.getMinorVersion() >= 9) {
-            ScoreboardTeam_setCollisionRule = ReflectionUtils.getOnlyMethod(ScoreboardTeam, void.class, EnumTeamPush);
-        }
-        if (nms.getMinorVersion() >= 17) {
-            TeamPacketConstructor_of = ReflectionUtils.getOnlyMethod(TeamPacketClass, TeamPacketClass, ScoreboardTeam);
-            TeamPacketConstructor_ofBoolean = ReflectionUtils.getOnlyMethod(TeamPacketClass, TeamPacketClass, ScoreboardTeam, boolean.class);
-        } else {
-            newTeamPacket = TeamPacketClass.getConstructor(ScoreboardTeam, int.class);
+            if (minorVersion >= 8) {
+                Class<?> EnumScoreboardHealthDisplay = BukkitReflection.getClass(
+                        "world.scores.criteria.ObjectiveCriteria$RenderType",
+                        "world.scores.criteria.IScoreboardCriteria$EnumScoreboardHealthDisplay",
+                        "IScoreboardCriteria$EnumScoreboardHealthDisplay",
+                        "EnumScoreboardHealthDisplay");
+                healthDisplays = (Enum<?>[]) EnumScoreboardHealthDisplay.getMethod("values").invoke(null);
+                if (minorVersion < 13) {
+                    Objective_RENDER_TYPE = ReflectionUtils.getOnlyField(ObjectivePacketClass, EnumScoreboardHealthDisplay);
+                }
+            }
+            if (minorVersion < 13) {
+                ScoreboardObjective_setDisplayName = ReflectionUtils.getOnlyMethod(ScoreboardObjective, void.class, String.class);
+            }
+            if (BukkitReflection.is1_20_3Plus()) {
+                NumberFormat = BukkitReflection.getClass("network.chat.numbers.NumberFormat");
+                newFixedFormat = BukkitReflection.getClass("network.chat.numbers.FixedFormat").getConstructor(Component);
+            }
+            scorePacketData = new ScorePacketData();
+            teamPacketData = new TeamPacketData();
+            displayPacketData = new DisplayPacketData();
+            available = true;
+        } catch (Exception ignored) {
+            // Print exception to find out what went wrong
         }
     }
 
-    public PacketScoreboard(BukkitTabPlayer player) {
+    public PacketScoreboard(@NotNull BukkitTabPlayer player) {
         super(player);
     }
 
     @Override
     @SneakyThrows
-    public void setDisplaySlot(@NotNull DisplaySlot slot, @NotNull String objective) {
-        player.sendPacket(newDisplayObjective.newInstance(slot.ordinal(), newScoreboardObjective(objective)));
+    public void setDisplaySlot0(int slot, @NotNull String objective) {
+        player.sendPacket(displayPacketData.setDisplaySlot(slot, newObjective(objective, "", 0, null)));
     }
 
     @Override
     @SneakyThrows
-    public void registerObjective0(@NotNull String objectiveName, @NotNull String title, boolean hearts) {
-        player.sendPacket(buildObjective(0, objectiveName, title, hearts));
+    public void registerObjective0(@NotNull String objectiveName, @NotNull String title, int display,
+                                   @Nullable IChatBaseComponent numberFormat) {
+        player.sendPacket(newObjectivePacket(ObjectiveAction.REGISTER, objectiveName, title, display, numberFormat));
     }
 
     @Override
     public void unregisterObjective0(@NotNull String objectiveName) {
-        player.sendPacket(buildObjective(1, objectiveName, "", false));
+        player.sendPacket(newObjectivePacket(ObjectiveAction.UNREGISTER, objectiveName, "", 0, null));
     }
 
     @Override
-    public void updateObjective0(@NotNull String objectiveName, @NotNull String title, boolean hearts) {
-        player.sendPacket(buildObjective(2, objectiveName, title, hearts));
+    public void updateObjective0(@NotNull String objectiveName, @NotNull String title, int display,
+                                 @Nullable IChatBaseComponent numberFormat) {
+        player.sendPacket(newObjectivePacket(ObjectiveAction.UPDATE, objectiveName, title, display, numberFormat));
     }
 
     @SneakyThrows
-    private Object buildObjective(int action, String objectiveName, String title, boolean hearts) {
-        if (nms.getMinorVersion() >= 13) {
-            return newObjectivePacket.newInstance(
-                    newScoreboardObjective.newInstance(null, objectiveName, null,
-                    nms.toNMSComponent(IChatBaseComponent.optimizedComponent(title), player.getVersion()),
-                    asDisplayType(hearts)),
-                    action
-            );
+    private Object newObjectivePacket(int action, @NotNull String objectiveName, @NotNull String title, int display,
+                                      @Nullable IChatBaseComponent numberFormat) {
+        Object packet = newObjectivePacket.newInstance(newObjective(objectiveName, title, display, numberFormat), action);
+        if (BukkitReflection.getMinorVersion() >= 8 && BukkitReflection.getMinorVersion() < 13) {
+            Objective_RENDER_TYPE.set(packet, healthDisplays[display]);
         }
-        Object nmsPacket = newObjectivePacket.newInstance();
-        Objective_OBJECTIVE_NAME.set(nmsPacket, objectiveName);
-        Objective_DISPLAY_NAME.set(nmsPacket, title);
-        if (nms.getMinorVersion() >= 8) {
-            Objective_RENDER_TYPE.set(nmsPacket, asDisplayType(hearts));
-        }
-        Objective_METHOD.set(nmsPacket, action);
-        return nmsPacket;
-    }
-
-    private Object asDisplayType(boolean hearts) {
-        return Enum.valueOf(EnumScoreboardHealthDisplay, hearts ? "HEARTS" : "INTEGER");
+        return packet;
     }
 
     @Override
@@ -207,106 +155,363 @@ public class PacketScoreboard extends Scoreboard<BukkitTabPlayer> {
     public void registerTeam0(@NotNull String name, @NotNull String prefix, @NotNull String suffix,
                               @NotNull NameVisibility visibility, @NotNull CollisionRule collision,
                               @NotNull Collection<String> players, int options) {
-        Object team = createTeam(name, prefix, suffix, visibility, collision, options);
-        ((Collection<String>)ScoreboardTeam_getPlayerNameSet.invoke(team)).addAll(players);
-        if (nms.getMinorVersion() >= 17) {
-            player.sendPacket(TeamPacketConstructor_ofBoolean.invoke(null, team, true));
-        } else {
-            player.sendPacket(newTeamPacket.newInstance(team, 0));
-        }
+        player.sendPacket(teamPacketData.registerTeam(name, prefix, toComponent(prefix), suffix,
+                toComponent(suffix), visibility, collision, players, options));
     }
 
     @Override
     @SneakyThrows
     public void unregisterTeam0(@NotNull String name) {
-        Object team = newScoreboardTeam.newInstance(emptyScoreboard, name);
-        if (nms.getMinorVersion() >= 17) {
-            player.sendPacket(TeamPacketConstructor_of.invoke(null, team));
-        } else {
-            player.sendPacket(newTeamPacket.newInstance(team, 1));
-        }
+        player.sendPacket(teamPacketData.unregisterTeam(name));
     }
 
     @Override
     @SneakyThrows
     public void updateTeam0(@NotNull String name, @NotNull String prefix, @NotNull String suffix,
                             @NotNull NameVisibility visibility, @NotNull CollisionRule collision, int options) {
-        Object team = createTeam(name, prefix, suffix, visibility, collision, options);
-        if (nms.getMinorVersion() >= 17) {
-            player.sendPacket(TeamPacketConstructor_ofBoolean.invoke(null, team, false));
-        } else {
-            player.sendPacket(newTeamPacket.newInstance(team, 2));
-        }
-    }
-
-    @SneakyThrows
-    private Object createTeam(String teamName, String prefix, String suffix, NameVisibility visibility, CollisionRule collision, int options) {
-        Object team = newScoreboardTeam.newInstance(emptyScoreboard, teamName);
-        ScoreboardTeam_setAllowFriendlyFire.invoke(team, (options & 0x1) > 0);
-        ScoreboardTeam_setCanSeeFriendlyInvisibles.invoke(team, (options & 0x2) > 0);
-        if (nms.getMinorVersion() >= 13) {
-            ScoreboardTeam_setPrefix.invoke(team, nms.toNMSComponent(IChatBaseComponent.optimizedComponent(prefix), player.getVersion()));
-            ScoreboardTeam_setSuffix.invoke(team, nms.toNMSComponent(IChatBaseComponent.optimizedComponent(suffix), player.getVersion()));
-            ScoreboardTeam_setColor.invoke(team, Enum.valueOf(nms.EnumChatFormat, EnumChatFormat.lastColorsOf(prefix).toString()));
-        } else {
-            ScoreboardTeam_setPrefix.invoke(team, prefix);
-            ScoreboardTeam_setSuffix.invoke(team, suffix);
-        }
-        if (nms.getMinorVersion() >= 8) ScoreboardTeam_setNameTagVisibility.invoke(team, Enum.valueOf(EnumNameTagVisibility, visibility.name()));
-        if (nms.getMinorVersion() >= 9) ScoreboardTeam_setCollisionRule.invoke(team, Enum.valueOf(EnumTeamPush, collision.name()));
-        return team;
+        player.sendPacket(teamPacketData.updateTeam(name, prefix, toComponent(prefix), suffix,
+                toComponent(suffix), visibility, collision, options));
     }
 
     @Override
-    @SneakyThrows
-    public void setScore0(@NotNull String objective, @NotNull String playerName, int score) {
-        Object packet;
-        if (nms.getMinorVersion() >= 13) {
-            packet = newScorePacket_1_13.newInstance(Enum.valueOf(EnumScoreboardAction, "CHANGE"), objective, playerName, score);
-        } else {
-            Object scoreboardScore = newScoreboardScore.newInstance(emptyScoreboard, newScoreboardObjective(objective), playerName);
-            ScoreboardScore_setScore.invoke(scoreboardScore, score);
-            if (nms.getMinorVersion() >= 8) {
-                packet = newScorePacket.newInstance(scoreboardScore);
-            } else {
-                packet = newScorePacket.newInstance(scoreboardScore, 0);
-            }
-        }
-        player.sendPacket(packet);
+    public void setScore0(@NotNull String objective, @NotNull String scoreHolder, int score,
+                          @Nullable IChatBaseComponent displayName, @Nullable IChatBaseComponent numberFormat) {
+        player.sendPacket(scorePacketData.setScore(objective, scoreHolder, score, toComponent(displayName), toFixedFormat(numberFormat)));
     }
 
     @Override
-    @SneakyThrows
-    public void removeScore0(@NotNull String objective, @NotNull String playerName) {
-        if (nms.getMinorVersion() >= 13) {
-            player.sendPacket(newScorePacket_1_13.newInstance(Enum.valueOf(EnumScoreboardAction, "REMOVE"), objective, playerName, 0));
-        } else {
-            player.sendPacket(newScorePacket_String.newInstance(playerName));
-        }
+    public void removeScore0(@NotNull String objective, @NotNull String scoreHolder) {
+        player.sendPacket(scorePacketData.removeScore(objective, scoreHolder));
     }
 
     /**
-     * Creates a new Scoreboard Objective with given name.
+     * Creates a new Scoreboard Objective with given parameters.
      *
      * @param   objectiveName
      *          Objective name
-     * @return  NMS Objective
+     * @param   title
+     *          Objective title
+     * @param   renderType
+     *          Render type
+     * @param   numberFormat
+     *          Default number format (1.20.3+)
+     * @return  Created objective
      */
     @SneakyThrows
-    public Object newScoreboardObjective(@NotNull String objectiveName) {
-        if (nms.getMinorVersion() >= 13) {
+    public Object newObjective(@NotNull String objectiveName, @NotNull String title, int renderType,
+                               @Nullable IChatBaseComponent numberFormat) {
+        if (BukkitReflection.is1_20_3Plus()) {
+            // 1.20.3+
             return newScoreboardObjective.newInstance(
-                    null,
+                    emptyScoreboard,
                     objectiveName,
-                    null,
-                    nms.toNMSComponent(new IChatBaseComponent(""), TAB.getInstance().getServerVersion()),
-                    null
+                    null, // Criteria
+                    toComponent(title),
+                    healthDisplays[renderType],
+                    false, // Auto update
+                    toFixedFormat(numberFormat)
             );
         }
-        return newScoreboardObjective.newInstance(
-                null,
-                objectiveName,
-                IScoreboardCriteria_self.get(null)
-        );
+        if (BukkitReflection.getMinorVersion() >= 13) {
+            // 1.13 - 1.20.2
+            return newScoreboardObjective.newInstance(
+                    emptyScoreboard,
+                    objectiveName,
+                    null, // Criteria
+                    toComponent(title),
+                    healthDisplays[renderType]
+            );
+        }
+        // 1.5 - 1.12.2
+        Object objective = newScoreboardObjective.newInstance(emptyScoreboard, objectiveName, IScoreboardCriteria_dummy);
+        ScoreboardObjective_setDisplayName.invoke(objective, title);
+        return objective;
+    }
+
+    @Nullable
+    private Object toComponent(@NotNull String text) {
+        return toComponent(IChatBaseComponent.optimizedComponent(text));
+    }
+
+    @Nullable
+    private Object toComponent(@Nullable IChatBaseComponent component) {
+        if (component == null || BukkitReflection.getMinorVersion() < 8) return null;
+        return componentCache.get(component, player.getVersion());
+    }
+
+    @Nullable
+    @SneakyThrows
+    private Object toFixedFormat(@Nullable IChatBaseComponent numberFormat) {
+        if (numberFormat == null || newFixedFormat == null) return null;
+        return newFixedFormat.newInstance(toComponent(numberFormat));
+    }
+
+    private static class ScorePacketData {
+
+        private final Constructor<?> newSetScorePacket;
+        private Constructor<?> newResetScorePacket;      // 1.20.3+
+        private Constructor<?> newSetScorePacket_String; // 1.12-
+        private Constructor<?> newScoreboardScore;       // 1.12-
+        private Field SetScorePacket_SCORE;              // 1.12-
+        private Enum<?>[] scoreboardActions;             // 1.20.2-
+
+        @SneakyThrows
+        public ScorePacketData() {
+            Class<?> SetScorePacket = BukkitReflection.getClass(
+                    "network.protocol.game.ClientboundSetScorePacket", // Mojang mapped
+                    "network.protocol.game.PacketPlayOutScoreboardScore", // Bukkit 1.17+
+                    "PacketPlayOutScoreboardScore", // 1.7 - 1.16.5
+                    "Packet207SetScoreboardScore" // 1.5 - 1.6.4
+            );
+            if (BukkitReflection.is1_20_3Plus()) {
+                newResetScorePacket = BukkitReflection.getClass("network.protocol.game.ClientboundResetScorePacket").getConstructor(String.class, String.class);
+                newSetScorePacket = SetScorePacket.getConstructor(String.class, String.class, int.class, Component, NumberFormat);
+            } else if (BukkitReflection.getMinorVersion() >= 13) {
+                Class<?> EnumScoreboardAction = BukkitReflection.getClass("server.ServerScoreboard$Method",
+                        "server.ScoreboardServer$Action", "ScoreboardServer$Action");
+                newSetScorePacket = SetScorePacket.getConstructor(EnumScoreboardAction, String.class, String.class, int.class);
+                scoreboardActions = (Enum<?>[]) EnumScoreboardAction.getMethod("values").invoke(null);
+            } else {
+                Class<?> ScoreboardScore = BukkitReflection.getClass("ScoreboardScore");
+                newSetScorePacket_String = SetScorePacket.getConstructor(String.class);
+                SetScorePacket_SCORE = ReflectionUtils.getFields(SetScorePacket, int.class).get(0);
+                newScoreboardScore = ScoreboardScore.getConstructor(Scoreboard, ScoreboardObjective, String.class);
+                if (BukkitReflection.getMinorVersion() >= 8) {
+                    newSetScorePacket = SetScorePacket.getConstructor(ScoreboardScore);
+                } else {
+                    newSetScorePacket = SetScorePacket.getConstructor(ScoreboardScore, int.class);
+                }
+            }
+        }
+
+        @SneakyThrows
+        public Object setScore(@NotNull String objective, @NotNull String scoreHolder, int score,
+                              @Nullable Object displayName, @Nullable Object numberFormat) {
+            if (BukkitReflection.is1_20_3Plus()) {
+                return newSetScorePacket.newInstance(scoreHolder, objective, score, displayName, numberFormat);
+            } else if (BukkitReflection.getMinorVersion() >= 13) {
+                return newSetScorePacket.newInstance(scoreboardActions[0], objective, scoreHolder, score);
+            } else {
+                Object scoreboardScore = newScoreboardScore.newInstance(
+                        emptyScoreboard,
+                        newScoreboardObjective.newInstance(emptyScoreboard, objective, IScoreboardCriteria_dummy),
+                        scoreHolder
+                );
+                Object packet;
+                if (BukkitReflection.getMinorVersion() >= 8) {
+                    packet = newSetScorePacket.newInstance(scoreboardScore);
+                } else {
+                    packet = newSetScorePacket.newInstance(scoreboardScore, ScoreAction.CHANGE);
+                }
+                SetScorePacket_SCORE.set(packet, score);
+                return packet;
+            }
+        }
+
+        @SneakyThrows
+        public Object removeScore(@NotNull String objective, @NotNull String scoreHolder) {
+            if (BukkitReflection.is1_20_3Plus()) {
+                return newResetScorePacket.newInstance(scoreHolder, objective);
+            } else if (BukkitReflection.getMinorVersion() >= 13) {
+                return newSetScorePacket.newInstance(scoreboardActions[1], objective, scoreHolder, 0);
+            } else {
+                return newSetScorePacket_String.newInstance(scoreHolder);
+            }
+        }
+    }
+
+    public static class TeamPacketData {
+
+        public Class<?> TeamPacketClass;
+        private Constructor<?> newTeamPacket;
+        private final Constructor<?> newScoreboardTeam;
+        private Method TeamPacketConstructor_of;
+        private Method TeamPacketConstructor_ofBoolean;
+        public Field TeamPacket_NAME;
+        public Field TeamPacket_ACTION;
+        public Field TeamPacket_PLAYERS;
+        private final Method ScoreboardTeam_getPlayerNameSet;
+        private Method ScoreboardTeam_setNameTagVisibility;
+        private Method ScoreboardTeam_setCollisionRule;
+        private final Method ScoreboardTeam_setPrefix;
+        private final Method ScoreboardTeam_setSuffix;
+        private Method ScoreboardTeam_setColor;
+        private final Method ScoreboardTeam_setAllowFriendlyFire;
+        private final Method ScoreboardTeam_setCanSeeFriendlyInvisibles;
+        private final Enum<?>[] chatFormats;
+        private Enum<?>[] nameVisibilities;
+        private Enum<?>[] collisionRules;
+
+        @SneakyThrows
+        public TeamPacketData() {
+            int minorVersion = BukkitReflection.getMinorVersion();
+            Class<?> scoreboardTeam = BukkitReflection.getClass("world.scores.PlayerTeam", "world.scores.ScoreboardTeam", "ScoreboardTeam");
+            Class<?> enumChatFormatClass = BukkitReflection.getClass("ChatFormatting", "EnumChatFormat", "EnumChatFormat");
+            TeamPacketClass = BukkitReflection.getClass(
+                    "network.protocol.game.ClientboundSetPlayerTeamPacket", // Mojang mapped
+                    "network.protocol.game.PacketPlayOutScoreboardTeam", // Bukkit 1.17+
+                    "PacketPlayOutScoreboardTeam", // Bukkit 1.7 - 1.16.5
+                    "Packet209SetScoreboardTeam" // 1.5 - 1.6.4
+            );
+            newScoreboardTeam = scoreboardTeam.getConstructor(Scoreboard, String.class);
+            TeamPacket_NAME = ReflectionUtils.getFields(TeamPacketClass, String.class).get(0);
+            TeamPacket_ACTION = ReflectionUtils.getInstanceFields(TeamPacketClass, int.class).get(0);
+            TeamPacket_PLAYERS = ReflectionUtils.getOnlyField(TeamPacketClass, Collection.class);
+            ScoreboardTeam_getPlayerNameSet = ReflectionUtils.getOnlyMethod(scoreboardTeam, Collection.class);
+            chatFormats = (Enum<?>[]) enumChatFormatClass.getMethod("values").invoke(null);
+            ScoreboardTeam_setAllowFriendlyFire = ReflectionUtils.getMethod(
+                    scoreboardTeam,
+                    new String[] {"func_96660_a", "setAllowFriendlyFire", "a", "m_83355_"}, // {Thermos, 1.5.1+, 1.5 & 1.18+, Mohist 1.18.2}
+                    boolean.class
+            );
+            ScoreboardTeam_setCanSeeFriendlyInvisibles = ReflectionUtils.getMethod(
+                    scoreboardTeam,
+                    new String[] {"func_98300_b", "setCanSeeFriendlyInvisibles", "b", "m_83362_", "setSeeFriendlyInvisibles"}, // {Thermos, 1.5.1+, 1.5 & 1.18+, Mohist 1.18.2, 1.20.2+}
+                    boolean.class
+            );
+            if (minorVersion >= 8) {
+                Class<?> enumNameTagVisibility = BukkitReflection.getClass(
+                        "world.scores.Team$Visibility", // Mojang mapped
+                        "world.scores.ScoreboardTeamBase$EnumNameTagVisibility", // Bukkit 1.17+
+                        "ScoreboardTeamBase$EnumNameTagVisibility", // Bukkit 1.8.1 - 1.16.5
+                        "EnumNameTagVisibility" // Bukkit 1.8.0
+                );
+                nameVisibilities = (Enum<?>[]) enumNameTagVisibility.getMethod("values").invoke(null);
+                ScoreboardTeam_setNameTagVisibility = ReflectionUtils.getMethod(
+                        scoreboardTeam,
+                        new String[] {"setNameTagVisibility", "a", "m_83346_"}, // {1.8.1+, 1.8 & 1.18+, Mohist 1.18.2}
+                        enumNameTagVisibility
+                );
+            }
+            if (minorVersion >= 9) {
+                Class<?> enumTeamPush = BukkitReflection.getClass("world.scores.Team$CollisionRule",
+                        "world.scores.ScoreboardTeamBase$EnumTeamPush", "ScoreboardTeamBase$EnumTeamPush");
+                ScoreboardTeam_setCollisionRule = ReflectionUtils.getOnlyMethod(scoreboardTeam, void.class, enumTeamPush);
+                collisionRules = (Enum<?>[]) enumTeamPush.getMethod("values").invoke(null);
+            }
+            if (minorVersion >= 13) {
+                ScoreboardTeam_setColor = ReflectionUtils.getOnlyMethod(scoreboardTeam, void.class, enumChatFormatClass);
+                ScoreboardTeam_setPrefix = ReflectionUtils.getMethod(
+                        scoreboardTeam,
+                        new String[]{"setPrefix", "b", "m_83360_", "setPlayerPrefix"}, // {1.17.1-, 1.18 - 1.20.1, Mohist 1.18.2, 1.20.2+}
+                        Component
+                );
+                ScoreboardTeam_setSuffix = ReflectionUtils.getMethod(
+                        scoreboardTeam,
+                        new String[]{"setSuffix", "c", "m_83365_", "setPlayerSuffix"}, // {1.17.1-, 1.18 - 1.20.1, Mohist 1.18.2, 1.20.2+}
+                        Component
+                );
+            } else {
+                ScoreboardTeam_setPrefix = ReflectionUtils.getMethod(
+                        scoreboardTeam,
+                        new String[] {"func_96666_b", "setPrefix", "b"}, // {Thermos, 1.5.1+, 1.5}
+                        String.class
+                );
+                ScoreboardTeam_setSuffix = ReflectionUtils.getMethod(
+                        scoreboardTeam,
+                        new String[] {"func_96662_c", "setSuffix", "c"}, // {Thermos, 1.5.1+, 1.5}
+                        String.class
+                );
+            }
+            if (minorVersion >= 17) {
+                TeamPacketConstructor_of = ReflectionUtils.getOnlyMethod(TeamPacketClass, TeamPacketClass, scoreboardTeam);
+                TeamPacketConstructor_ofBoolean = ReflectionUtils.getOnlyMethod(TeamPacketClass, TeamPacketClass, scoreboardTeam, boolean.class);
+            } else {
+                newTeamPacket = TeamPacketClass.getConstructor(scoreboardTeam, int.class);
+            }
+        }
+
+        @SneakyThrows
+        public Object registerTeam(@NotNull String name, @NotNull String prefix, @Nullable Object prefixComponent,
+                                   @NotNull String suffix, @Nullable Object suffixComponent,
+                                   @NotNull NameVisibility visibility, @NotNull CollisionRule collision,
+                                   @NotNull Collection<String> players, int options) {
+            Object team = createTeam(name, prefix, prefixComponent, suffix, suffixComponent, visibility, collision, options);
+            ((Collection<String>)ScoreboardTeam_getPlayerNameSet.invoke(team)).addAll(players);
+            if (BukkitReflection.getMinorVersion() >= 17) {
+                return TeamPacketConstructor_ofBoolean.invoke(null, team, true);
+            } else {
+                return newTeamPacket.newInstance(team, TeamAction.CREATE);
+            }
+        }
+
+        @SneakyThrows
+        public Object unregisterTeam(@NotNull String name) {
+            Object team = newScoreboardTeam.newInstance(emptyScoreboard, name);
+            if (BukkitReflection.getMinorVersion() >= 17) {
+                return TeamPacketConstructor_of.invoke(null, team);
+            } else {
+                return newTeamPacket.newInstance(team, TeamAction.REMOVE);
+            }
+        }
+
+        @SneakyThrows
+        public Object updateTeam(@NotNull String name, @NotNull String prefix, @Nullable Object prefixComponent,
+                                 @NotNull String suffix, @Nullable Object suffixComponent,
+                                 @NotNull NameVisibility visibility, @NotNull CollisionRule collision, int options) {
+            Object team = createTeam(name, prefix, prefixComponent, suffix, suffixComponent, visibility, collision, options);
+            if (BukkitReflection.getMinorVersion() >= 17) {
+                return TeamPacketConstructor_ofBoolean.invoke(null, team, false);
+            } else {
+                return newTeamPacket.newInstance(team, TeamAction.UPDATE);
+            }
+        }
+
+        @SneakyThrows
+        private Object createTeam(@NotNull String teamName, @NotNull String prefix, @Nullable Object prefixComponent,
+                                  @NotNull String suffix, @Nullable Object suffixComponent,
+                                  @NotNull NameVisibility visibility, @NotNull CollisionRule collision, int options) {
+            Object team = newScoreboardTeam.newInstance(emptyScoreboard, teamName);
+            ScoreboardTeam_setAllowFriendlyFire.invoke(team, (options & 0x1) > 0);
+            ScoreboardTeam_setCanSeeFriendlyInvisibles.invoke(team, (options & 0x2) > 0);
+            if (BukkitReflection.getMinorVersion() >= 13) {
+                ScoreboardTeam_setPrefix.invoke(team, prefixComponent);
+                ScoreboardTeam_setSuffix.invoke(team, suffixComponent);
+                ScoreboardTeam_setColor.invoke(team, chatFormats[EnumChatFormat.lastColorsOf(prefix).ordinal()]);
+            } else {
+                ScoreboardTeam_setPrefix.invoke(team, prefix);
+                ScoreboardTeam_setSuffix.invoke(team, suffix);
+            }
+            if (BukkitReflection.getMinorVersion() >= 8)
+                ScoreboardTeam_setNameTagVisibility.invoke(team, nameVisibilities[visibility.ordinal()]);
+            if (BukkitReflection.getMinorVersion() >= 9)
+                ScoreboardTeam_setCollisionRule.invoke(team, collisionRules[collision.ordinal()]);
+            return team;
+        }
+    }
+
+    public static class DisplayPacketData {
+
+        public final Class<?> DisplayObjectiveClass;
+        private final Constructor<?> newDisplayObjective;
+        public final Field DisplayObjective_POSITION;
+        public final Field DisplayObjective_OBJECTIVE_NAME;
+        private final Object[] displaySlots;
+
+        @SneakyThrows
+        public DisplayPacketData() {
+            DisplayObjectiveClass = BukkitReflection.getClass(
+                    "network.protocol.game.ClientboundSetDisplayObjectivePacket", // Mojang mapped
+                    "network.protocol.game.PacketPlayOutScoreboardDisplayObjective", // Bukkit 1.17+
+                    "PacketPlayOutScoreboardDisplayObjective", // Bukkit 1.7 - 1.16.5
+                    "Packet208SetScoreboardDisplayObjective" // Bukkit 1.5 - 1.6.4
+            );
+            DisplayObjective_OBJECTIVE_NAME = ReflectionUtils.getOnlyField(DisplayObjectiveClass, String.class);
+            if (BukkitReflection.is1_20_2Plus()) {
+                Class<?> DisplaySlot = BukkitReflection.getClass("world.scores.DisplaySlot");
+                displaySlots = (Object[]) DisplaySlot.getDeclaredMethod("values").invoke(null);
+                DisplayObjective_POSITION = ReflectionUtils.getOnlyField(DisplayObjectiveClass, DisplaySlot);
+                newDisplayObjective = DisplayObjectiveClass.getConstructor(DisplaySlot, ScoreboardObjective);
+            } else {
+                displaySlots = new Object[]{0, 1, 2};
+                DisplayObjective_POSITION = ReflectionUtils.getOnlyField(DisplayObjectiveClass, int.class);
+                newDisplayObjective = DisplayObjectiveClass.getConstructor(int.class, ScoreboardObjective);
+            }
+        }
+
+        @SneakyThrows
+        public Object setDisplaySlot(int slot, @NotNull Object objective) {
+            return newDisplayObjective.newInstance(displaySlots[slot], objective);
+        }
     }
 }

bukkit/src/main/java/me/neznamy/tab/platforms/bukkit/scoreboard/PaperScoreboard.java

@@ -1,20 +1,16 @@
 package me.neznamy.tab.platforms.bukkit.scoreboard;
 
+import lombok.Getter;
 import me.neznamy.tab.platforms.bukkit.BukkitTabPlayer;
-import me.neznamy.tab.shared.TAB;
-import me.neznamy.tab.shared.chat.EnumChatFormat;
 import me.neznamy.tab.shared.chat.IChatBaseComponent;
-import me.neznamy.tab.shared.platform.Scoreboard;
+import me.neznamy.tab.shared.hook.AdventureHook;
+import me.neznamy.tab.shared.util.ReflectionUtils;
 import net.kyori.adventure.text.Component;
-import org.bukkit.Bukkit;
-import org.bukkit.ChatColor;
 import org.bukkit.scoreboard.Objective;
 import org.bukkit.scoreboard.RenderType;
 import org.bukkit.scoreboard.Team;
 import org.jetbrains.annotations.NotNull;
 
-import java.util.Collection;
-
 /**
  * Scoreboard handler using Paper API, which got added
  * in early 1.16.5 builds. Unlike the Bukkit API, the new
@@ -23,98 +19,36 @@ import java.util.Collection;
  * <p>
  * However, it still inherits the issue with compatibility
  * with other plugins that create scoreboards.
- * <p>
- * Currently, this class is never used. In the future, it might
- * be used as a fallback solution for unsupported versions if NMS
- * changes and fields fail to load. Or as a complete replacement
- * if compatibility with other plugins turns out not to be a problem.
  */
-// Throw the NPE if something is not as expected, parent class should ensure it anyway
-// Use Bukkit setColor, the adventure one does not support magic codes while they are permitted
-@SuppressWarnings({"ConstantConditions", "deprecation"})
-public class PaperScoreboard extends Scoreboard<BukkitTabPlayer> {
+public class PaperScoreboard extends BukkitScoreboard {
 
-    private final org.bukkit.scoreboard.Scoreboard scoreboard = Bukkit.getScoreboardManager().getNewScoreboard();
+    /** Flag tracking whether this implementation is available for use */
+    @Getter
+    private static final boolean available = ReflectionUtils.classExists("net.kyori.adventure.text.Component") &&
+            ReflectionUtils.methodExists(Team.class, "prefix", Component.class);
 
-    public PaperScoreboard(BukkitTabPlayer player) {
+    public PaperScoreboard(@NotNull BukkitTabPlayer player) {
         super(player);
-
-        // Put player into a different scoreboard for per-player view
-        player.getPlayer().setScoreboard(scoreboard);
     }
 
     @Override
-    public void setDisplaySlot(@NotNull DisplaySlot slot, @NotNull String objective) {
-        checkPlayerScoreboard();
-        scoreboard.getObjective(objective).setDisplaySlot(org.bukkit.scoreboard.DisplaySlot.valueOf(slot.name()));
+    public void newObjective(String objectiveName, String criteria, String title, int display) {
+        scoreboard.registerNewObjective(objectiveName, criteria, toAdventure(title), RenderType.values()[display]);
     }
 
     @Override
-    public void setScore0(@NotNull String objective, @NotNull String playerName, int score) {
-        checkPlayerScoreboard();
-        scoreboard.getObjective(objective).getScore(playerName).setScore(score);
+    public void setDisplayName(@NotNull Objective objective, @NotNull String displayName) {
+        objective.displayName(toAdventure(displayName));
     }
 
     @Override
-    public void removeScore0(@NotNull String objective, @NotNull String playerName) {
-        checkPlayerScoreboard();
-        scoreboard.resetScores(playerName);
-    }
-
-    @Override
-    public void registerObjective0(@NotNull String objectiveName, @NotNull String title, boolean hearts) {
-        checkPlayerScoreboard();
-        scoreboard.registerNewObjective(objectiveName, "dummy", toAdventure(title), hearts ? RenderType.HEARTS : RenderType.INTEGER);
-    }
-
-    @Override
-    public void unregisterObjective0(@NotNull String objectiveName) {
-        checkPlayerScoreboard();
-        scoreboard.getObjective(objectiveName).unregister();
-    }
-
-    @Override
-    public void updateObjective0(@NotNull String objectiveName, @NotNull String title, boolean hearts) {
-        checkPlayerScoreboard();
-        Objective obj = scoreboard.getObjective(objectiveName);
-        obj.setRenderType(hearts ? RenderType.HEARTS : RenderType.INTEGER);
-        obj.displayName(toAdventure(title));
-    }
-
-    @Override
-    public void registerTeam0(@NotNull String name, @NotNull String prefix, @NotNull String suffix,
-                              @NotNull NameVisibility visibility, @NotNull CollisionRule collision,
-                              @NotNull Collection<String> players, int options) {
-        checkPlayerScoreboard();
-        Team team = scoreboard.registerNewTeam(name);
+    public void setPrefix(@NotNull Team team, @NotNull String prefix) {
         team.prefix(toAdventure(prefix));
-        team.suffix(toAdventure(suffix));
-        team.setColor(ChatColor.valueOf(EnumChatFormat.lastColorsOf(prefix).name()));
-        team.setOption(Team.Option.NAME_TAG_VISIBILITY, Team.OptionStatus.values()[visibility.ordinal()]);
-        team.setOption(Team.Option.COLLISION_RULE, Team.OptionStatus.values()[collision.ordinal()]);
-        players.forEach(team::addEntry);
-        team.setAllowFriendlyFire((options & 0x01) != 0);
-        team.setCanSeeFriendlyInvisibles((options & 0x02) != 0);
     }
 
     @Override
-    public void unregisterTeam0(@NotNull String name) {
-        checkPlayerScoreboard();
-        scoreboard.getTeam(name).unregister();
-    }
-
-    @Override
-    public void updateTeam0(@NotNull String name, @NotNull String prefix, @NotNull String suffix,
-                            @NotNull NameVisibility visibility, @NotNull CollisionRule collision, int options) {
-        checkPlayerScoreboard();
-        Team team = scoreboard.getTeam(name);
-        team.prefix(toAdventure(prefix));
+    public void setSuffix(@NotNull Team team, @NotNull String suffix) {
         team.suffix(toAdventure(suffix));
-        team.setColor(ChatColor.valueOf(EnumChatFormat.lastColorsOf(prefix).name()));
-        team.setOption(Team.Option.NAME_TAG_VISIBILITY, Team.OptionStatus.values()[visibility.ordinal()]);
-        team.setOption(Team.Option.COLLISION_RULE, Team.OptionStatus.values()[collision.ordinal()]);
-        team.setAllowFriendlyFire((options & 0x01) != 0);
-        team.setCanSeeFriendlyInvisibles((options & 0x02) != 0);
     }
 
     /**
@@ -124,24 +58,8 @@ public class PaperScoreboard extends Scoreboard<BukkitTabPlayer> {
      *          Text to convert
      * @return  Converted component
      */
-    private @NotNull Component toAdventure(@NotNull String text) {
-        return IChatBaseComponent.optimizedComponent(text).toAdventureComponent(player.getVersion());
-    }
-
-    /**
-     * Makes sure player is in the correct scoreboard.
-     * If not, puts the player into correct scoreboard and prints
-     * a warning.
-     * The only possible reason for this to happen is another plugin
-     * putting a player into a different scoreboard.
-     * Sadly there is no efficient solution to this, which md_5 fails
-     * to understand and keeps saying you don't need packets for scoreboards.
-     */
-    private void checkPlayerScoreboard() {
-        if (player.getPlayer().getScoreboard() != scoreboard) {
-            player.getPlayer().setScoreboard(scoreboard);
-            TAB.getInstance().getErrorManager().printError("Player " + player.getName() + " was in a different scoreboard " +
-                    "than expected. This means another plugin changed player's scoreboard.");
-        }
+    @NotNull
+    private Component toAdventure(@NotNull String text) {
+        return AdventureHook.toAdventureComponent(IChatBaseComponent.optimizedComponent(text), player.getVersion());
     }
 }

bukkit/src/main/java/me/neznamy/tab/platforms/bukkit/scoreboard/ScoreboardLoader.java

@@ -0,0 +1,45 @@
+package me.neznamy.tab.platforms.bukkit.scoreboard;
+
+import lombok.Getter;
+import me.neznamy.tab.platforms.bukkit.BukkitTabPlayer;
+import me.neznamy.tab.platforms.bukkit.nms.PacketSender;
+import me.neznamy.tab.shared.chat.EnumChatFormat;
+import me.neznamy.tab.shared.platform.Scoreboard;
+import org.bukkit.Bukkit;
+
+import java.util.function.Function;
+
+public class ScoreboardLoader {
+
+    /** Instance function */
+    @Getter
+    private static Function<BukkitTabPlayer, Scoreboard<BukkitTabPlayer>> instance;
+
+    /**
+     * Finds the best available instance for current server software.
+     */
+    public static void findInstance() {
+        if (PacketScoreboard.isAvailable() && PacketSender.isAvailable()) {
+            instance = PacketScoreboard::new;
+        } else if (PaperScoreboard.isAvailable()) {
+            instance = PaperScoreboard::new;
+            sendMessage("Paper");
+        } else if (BukkitScoreboard.isAvailable()) {
+            instance = BukkitScoreboard::new;
+            sendMessage("Bukkit");
+        } else {
+            instance = NullScoreboard::new;
+            Bukkit.getConsoleSender().sendMessage(EnumChatFormat.RED.getFormat() + "[TAB] Failed to initialize NMS fields for " +
+                    "Scoreboards due to a compatibility error. No fallback solution was found either. This will " +
+                    "result in the features not working. " +
+                    "Please update the plugin a to version with native support for your server version to unlock the features.");
+        }
+    }
+
+    private static void sendMessage(String implementationName) {
+        Bukkit.getConsoleSender().sendMessage(EnumChatFormat.RED.getFormat() + "[TAB] Failed to initialize NMS fields for " +
+                "Scoreboards due to a compatibility error. Using fallback solution using " + implementationName + " API. " +
+                "This may result in features not working properly, mainly compatibility with other plugins. " +
+                "Please update the plugin to a version with native support for your server version for optimal experience.");
+    }
+}

bukkit/src/main/resources/plugin.yml

@@ -7,7 +7,7 @@ load: POSTWORLD
 author: @author@
 website: "@website@"
 depend: []
-softdepend: [PlaceholderAPI, LuckPerms, LibsDisguises, ViaVersion, ViaRewind, floodgate]
+softdepend: [PlaceholderAPI, LuckPerms, LibsDisguises, ViaVersion, ViaRewind, floodgate, Vault]
 loadbefore: []
 prefix: TAB
 libraries: []
@@ -49,9 +49,6 @@ permissions:
   tab.change.*:
     description: Allows player to change property using command
     default: op
-  tab.width:
-    description: Allows player to run /tab width
-    default: op
   tab.announce.bar:
     description: Allows player to run /tab announce bar
     default: op

bungeecord/build.gradle.kts

@@ -1,7 +1,7 @@
 dependencies {
     implementation(projects.shared)
     implementation("org.bstats:bstats-bungeecord:3.0.1")
-    compileOnly("net.md-5:bungeecord-proxy:1.20-R0.1-SNAPSHOT")
+    compileOnly("net.md-5:bungeecord-proxy:1.20-R0.2-SNAPSHOT")
     compileOnly("com.github.limework.redisbungee:RedisBungee-Bungee:0.11.0")
     compileOnly("com.github.LeonMangler:PremiumVanishAPI:2.8.8")
 }

bungeecord/src/main/java/me/neznamy/tab/platforms/bungeecord/BungeeBossBar.java

@@ -1,10 +1,10 @@
 package me.neznamy.tab.platforms.bungeecord;
 
 import lombok.RequiredArgsConstructor;
-import me.neznamy.tab.shared.platform.bossbar.BossBar;
+import me.neznamy.tab.shared.chat.IChatBaseComponent;
+import me.neznamy.tab.shared.platform.BossBar;
 import me.neznamy.tab.api.bossbar.BarColor;
 import me.neznamy.tab.api.bossbar.BarStyle;
-import me.neznamy.tab.shared.chat.IChatBaseComponent;
 import org.jetbrains.annotations.NotNull;
 
 import java.util.HashMap;
@@ -18,11 +18,15 @@ import java.util.UUID;
  */
 @RequiredArgsConstructor
 public class BungeeBossBar implements BossBar {
-    
-    private final @NotNull BungeeTabPlayer player;
+
+    @NotNull
+    private final BungeeTabPlayer player;
 
     /** Both are included in the same action, need to remember and write them both */
+    @NotNull
     private final Map<UUID, Integer> colors = new HashMap<>();
+
+    @NotNull
     private final Map<UUID, Integer> styles = new HashMap<>();
 
     @Override
@@ -31,10 +35,10 @@ public class BungeeBossBar implements BossBar {
 
         net.md_5.bungee.protocol.packet.BossBar packet = new net.md_5.bungee.protocol.packet.BossBar(id, 0);
         packet.setHealth(progress);
-        packet.setTitle(IChatBaseComponent.optimizedComponent(title).toString(player.getVersion()));
+        packet.setTitle(player.getPlatform().toComponent(IChatBaseComponent.optimizedComponent(title), player.getVersion()));
         packet.setColor(color.ordinal());
         packet.setDivision(style.ordinal());
-        player.getPlayer().unsafe().sendPacket(packet);
+        player.sendPacket(packet);
 
         colors.put(id, color.ordinal());
         styles.put(id, style.ordinal());
@@ -45,8 +49,8 @@ public class BungeeBossBar implements BossBar {
         if (player.getVersion().getMinorVersion() < 9) return;
 
         net.md_5.bungee.protocol.packet.BossBar packet = new net.md_5.bungee.protocol.packet.BossBar(id, 3);
-        packet.setTitle(IChatBaseComponent.optimizedComponent(title).toString(player.getVersion()));
-        player.getPlayer().unsafe().sendPacket(packet);
+        packet.setTitle(player.getPlatform().toComponent(IChatBaseComponent.optimizedComponent(title), player.getVersion()));
+        player.sendPacket(packet);
     }
 
     @Override
@@ -55,7 +59,7 @@ public class BungeeBossBar implements BossBar {
 
         net.md_5.bungee.protocol.packet.BossBar packet = new net.md_5.bungee.protocol.packet.BossBar(id, 2);
         packet.setHealth(progress);
-        player.getPlayer().unsafe().sendPacket(packet);
+        player.sendPacket(packet);
     }
 
     @Override
@@ -65,7 +69,7 @@ public class BungeeBossBar implements BossBar {
         net.md_5.bungee.protocol.packet.BossBar packet = new net.md_5.bungee.protocol.packet.BossBar(id, 4);
         packet.setDivision(style.ordinal());
         packet.setColor(colors.get(id));
-        player.getPlayer().unsafe().sendPacket(packet);
+        player.sendPacket(packet);
 
         styles.put(id, style.ordinal());
     }
@@ -77,7 +81,7 @@ public class BungeeBossBar implements BossBar {
         net.md_5.bungee.protocol.packet.BossBar packet = new net.md_5.bungee.protocol.packet.BossBar(id, 4);
         packet.setDivision(styles.get(id));
         packet.setColor(color.ordinal());
-        player.getPlayer().unsafe().sendPacket(packet);
+        player.sendPacket(packet);
 
         colors.put(id, color.ordinal());
     }
@@ -86,7 +90,7 @@ public class BungeeBossBar implements BossBar {
     public void remove(@NotNull UUID id) {
         if (player.getVersion().getMinorVersion() < 9) return;
 
-        player.getPlayer().unsafe().sendPacket(new net.md_5.bungee.protocol.packet.BossBar(id, 1));
+        player.sendPacket(new net.md_5.bungee.protocol.packet.BossBar(id, 1));
 
         colors.remove(id);
         styles.remove(id);

bungeecord/src/main/java/me/neznamy/tab/platforms/bungeecord/BungeeEventListener.java

@@ -1,5 +1,7 @@
 package me.neznamy.tab.platforms.bungeecord;
 
+import me.neznamy.tab.shared.ProtocolVersion;
+import me.neznamy.tab.shared.TAB;
 import me.neznamy.tab.shared.TabConstants;
 import me.neznamy.tab.shared.platform.EventListener;
 import me.neznamy.tab.shared.platform.TabPlayer;
@@ -10,6 +12,7 @@ import net.md_5.bungee.api.event.PluginMessageEvent;
 import net.md_5.bungee.api.event.ServerSwitchEvent;
 import net.md_5.bungee.api.plugin.Listener;
 import net.md_5.bungee.event.EventHandler;
+import org.jetbrains.annotations.NotNull;
 
 /**
  * The core for BungeeCord forwarding events into all enabled features
@@ -23,27 +26,57 @@ public class BungeeEventListener extends EventListener<ProxiedPlayer> implements
 
     @EventHandler
     public void onSwitch(ServerSwitchEvent e) {
-        serverChange(e.getPlayer(), e.getPlayer().getUniqueId(), e.getPlayer().getServer().getInfo().getName());
+        TAB tab = TAB.getInstance();
+        if (tab.isPluginDisabled()) return;
+
+        // Avoid 1.20.3 client crash on scoreboard packets, do it sync to prevent packet being sent after event, but before processing
+        TabPlayer p = tab.getPlayer(e.getPlayer().getUniqueId());
+        if (p != null && p.getVersion().getNetworkId() >= ProtocolVersion.V1_20_3.getNetworkId()) {
+            p.getScoreboard().freeze();
+        }
+
+        tab.getCPUManager().runTask(() -> {
+            TabPlayer player = tab.getPlayer(e.getPlayer().getUniqueId());
+            if (player == null) {
+                player = createPlayer(e.getPlayer());
+
+                // Things will get cleared immediately after, so no point in sending it, also someone said it fixed some warn from Geyser
+                // Sending these packets before login packet will also crash the client on 1.20.3
+                if (player.getVersion().getNetworkId() >= ProtocolVersion.V1_20_2.getNetworkId()) {
+                    player.getScoreboard().freeze();
+                }
+
+                tab.getFeatureManager().onJoin(player);
+            } else {
+                tab.getFeatureManager().onServerChange(player.getUniqueId(), e.getPlayer().getServer().getInfo().getName());
+                if (player.getVersion().getNetworkId() < ProtocolVersion.V1_20_2.getNetworkId()) {
+                    // For versions below 1.20.2 the tablist is already clean when this event is called
+                    // For 1.20.2+ this event is called before, so we listen to Login packet instead
+                    tab.getFeatureManager().onTabListClear(player);
+                }
+            }
+        });
     }
 
     @EventHandler
-    public void onChat(ChatEvent e) {
+    public void onCommand(ChatEvent e) {
         if (e.isCommand() && command(((ProxiedPlayer)e.getSender()).getUniqueId(), e.getMessage())) {
             e.setCancelled(true);
         }
     }
 
     @EventHandler
-    public void on(PluginMessageEvent event) {
-        if (!event.getTag().equals(TabConstants.PLUGIN_MESSAGE_CHANNEL_NAME)) return;
-        if (event.getReceiver() instanceof ProxiedPlayer) {
-            event.setCancelled(true);
-            pluginMessage(((ProxiedPlayer) event.getReceiver()).getUniqueId(), event.getData());
+    public void on(PluginMessageEvent e) {
+        if (!e.getTag().equals(TabConstants.PLUGIN_MESSAGE_CHANNEL_NAME)) return;
+        if (e.getReceiver() instanceof ProxiedPlayer) {
+            e.setCancelled(true);
+            pluginMessage(((ProxiedPlayer) e.getReceiver()).getUniqueId(), e.getData());
         }
     }
 
     @Override
-    public TabPlayer createPlayer(ProxiedPlayer player) {
-        return new BungeeTabPlayer(player);
+    @NotNull
+    public TabPlayer createPlayer(@NotNull ProxiedPlayer player) {
+        return new BungeeTabPlayer((BungeePlatform) TAB.getInstance().getPlatform(), player);
     }
 }

bungeecord/src/main/java/me/neznamy/tab/platforms/bungeecord/BungeePipelineInjector.java

@@ -8,6 +8,7 @@ import io.netty.channel.ChannelHandlerContext;
 import io.netty.channel.ChannelPromise;
 import java.lang.reflect.Field;
 
+import lombok.SneakyThrows;
 import me.neznamy.tab.shared.features.nametags.NameTag;
 import me.neznamy.tab.shared.features.redis.RedisSupport;
 import me.neznamy.tab.shared.features.redis.feature.RedisTeams;
@@ -18,14 +19,17 @@ import me.neznamy.tab.shared.TabConstants;
 import me.neznamy.tab.shared.features.injection.NettyPipelineInjector;
 import me.neznamy.tab.shared.features.redis.RedisPlayer;
 import me.neznamy.tab.shared.features.sorting.Sorting;
+import me.neznamy.tab.shared.util.ReflectionUtils;
 import net.md_5.bungee.api.connection.ProxiedPlayer;
 import net.md_5.bungee.connection.InitialHandler;
 import net.md_5.bungee.netty.ChannelWrapper;
 import net.md_5.bungee.protocol.DefinedPacket;
+import net.md_5.bungee.protocol.Protocol;
 import net.md_5.bungee.protocol.packet.*;
 import org.jetbrains.annotations.NotNull;
 import org.jetbrains.annotations.Nullable;
 
+import java.lang.reflect.Method;
 import java.util.Collection;
 import java.util.function.Function;
 import java.util.function.Supplier;
@@ -38,41 +42,51 @@ import java.util.function.Supplier;
 @SuppressWarnings("unchecked")
 public class BungeePipelineInjector extends NettyPipelineInjector {
 
-    private static @Nullable Field wrapperField;
+    /** Inaccessible bungee internals */
+    @Nullable
+    private static Field wrapperField;
+
+    @Nullable
+    private static Object directionData;
+
+    @Nullable
+    private static Method getId;
 
     static {
         try {
             (wrapperField = InitialHandler.class.getDeclaredField("ch")).setAccessible(true);
+            directionData = ReflectionUtils.setAccessible(Protocol.class.getDeclaredField("TO_CLIENT")).get(Protocol.GAME);
+            getId = ReflectionUtils.setAccessible(Protocol.DirectionData.class.getDeclaredMethod("getId", Class.class, int.class));
         } catch (ReflectiveOperationException exception) {
             TAB.getInstance().getErrorManager().criticalError("Failed to initialize bungee internal fields", exception);
         }
     }
 
     /** Packets used by the plugin that must be deserialized and BungeeCord does not do it automatically */
+    @NotNull
     private final Class<? extends DefinedPacket>[] extraPacketClasses = new Class[]{Team.class, ScoreboardDisplay.class, ScoreboardObjective.class};
+
+    @NotNull
     private final Supplier<DefinedPacket>[] extraPacketSuppliers = new Supplier[]{Team::new, ScoreboardDisplay::new, ScoreboardObjective::new};
 
     @Override
+    @NotNull
     public Function<TabPlayer, ChannelDuplexHandler> getChannelFunction() {
         return byteBufDeserialization ? DeserializableBungeeChannelDuplexHandler::new : TabChannelDuplexHandler::new;
     }
 
     @Override
-    protected @Nullable Channel getChannel(@NotNull TabPlayer player) {
+    @Nullable
+    @SneakyThrows
+    protected Channel getChannel(@NotNull TabPlayer player) {
         if (wrapperField == null) return null;
-        final BungeeTabPlayer bungee = (BungeeTabPlayer) player;
-        try {
-            return ((ChannelWrapper) wrapperField.get(bungee.getPlayer().getPendingConnection())).getHandle();
-        } catch (final IllegalAccessException exception) {
-            TAB.getInstance().getErrorManager().criticalError("Failed to get channel of " + bungee.getPlayer().getName(), exception);
-        }
-        return null;
+        return ((ChannelWrapper) wrapperField.get(((BungeeTabPlayer) player).getPlayer().getPendingConnection())).getHandle();
     }
 
     @Override
     public void onDisplayObjective(@NotNull TabPlayer player, @NotNull Object packet) {
         TAB.getInstance().getFeatureManager().onDisplayObjective(player,
-                ((ScoreboardDisplay) packet).getPosition(), ((ScoreboardDisplay) packet).getName());
+                ((ScoreboardDisplay)packet).getPosition(), ((ScoreboardDisplay) packet).getName());
     }
 
     @Override
@@ -110,10 +124,11 @@ public class BungeePipelineInjector extends NettyPipelineInjector {
         for (TabPlayer p : TAB.getInstance().getOnlinePlayers()) {
             Sorting sorting = TAB.getInstance().getFeatureManager().getFeature(TabConstants.Feature.SORTING);
             String expectedTeam = sorting.getShortTeamName(p);
-            if (expectedTeam != null && col.contains(p.getName()) &&
+            if (expectedTeam != null && (col.contains(p.getNickname()) || col.contains(p.getName())) &&
                     !((NameTag)TAB.getInstance().getNameTagManager()).getDisableChecker().isDisabledPlayer(p) &&
                     !TAB.getInstance().getNameTagManager().hasTeamHandlingPaused(p) && !packet.getName().equals(expectedTeam)) {
                 logTeamOverride(packet.getName(), p.getName(), expectedTeam);
+                col.remove(p.getNickname());
                 col.remove(p.getName());
             }
         }
@@ -122,9 +137,9 @@ public class BungeePipelineInjector extends NettyPipelineInjector {
             RedisTeams teams = redis.getRedisTeams();
             if (teams != null) {
                 for (RedisPlayer p : redis.getRedisPlayers().values()) {
-                    if (col.contains(p.getName()) && !packet.getName().equals(teams.getTeamNames().get(p))) {
-                        logTeamOverride(packet.getName(), p.getName(), teams.getTeamNames().get(p));
-                        col.remove(p.getName());
+                    if (col.contains(p.getNickname()) && !packet.getName().equals(teams.getTeamNames().get(p))) {
+                        logTeamOverride(packet.getName(), p.getNickname(), teams.getTeamNames().get(p));
+                        col.remove(p.getNickname());
                     }
                 }
             }
@@ -134,25 +149,42 @@ public class BungeePipelineInjector extends NettyPipelineInjector {
 
     @Override
     public void onPlayerInfo(@NotNull TabPlayer receiver, @NotNull Object packet) {
-        if (packet instanceof PlayerListItemUpdate) {
-            PlayerListItemUpdate update = (PlayerListItemUpdate) packet;
-            for (PlayerListItem.Item item : update.getItems()) {
-                if (update.getActions().contains(PlayerListItemUpdate.Action.UPDATE_DISPLAY_NAME)) {
-                    IChatBaseComponent newDisplayName = TAB.getInstance().getFeatureManager().onDisplayNameChange(receiver, item.getUuid());
-                    if (newDisplayName != null) item.setDisplayName(newDisplayName.toString(receiver.getVersion()));
-                }
-            }
-        } else {
+        if (packet instanceof PlayerListItem) {
             PlayerListItem listItem = (PlayerListItem) packet;
             for (PlayerListItem.Item item : listItem.getItems()) {
                 if (listItem.getAction() == PlayerListItem.Action.UPDATE_DISPLAY_NAME || listItem.getAction() == PlayerListItem.Action.ADD_PLAYER) {
                     IChatBaseComponent newDisplayName = TAB.getInstance().getFeatureManager().onDisplayNameChange(receiver, item.getUuid());
-                    if (newDisplayName != null) item.setDisplayName(newDisplayName.toString(receiver.getVersion()));
+                    if (newDisplayName != null) item.setDisplayName(((BungeeTabPlayer)receiver).getPlatform().toComponent(newDisplayName, receiver.getVersion()));
+                }
+                if (listItem.getAction() == PlayerListItem.Action.UPDATE_LATENCY || listItem.getAction() == PlayerListItem.Action.ADD_PLAYER) {
+                    item.setPing(TAB.getInstance().getFeatureManager().onLatencyChange(receiver, item.getUuid(), item.getPing()));
+                }
+                if (listItem.getAction() == PlayerListItem.Action.ADD_PLAYER) {
+                    TAB.getInstance().getFeatureManager().onEntryAdd(receiver, item.getUuid(), item.getUsername());
+                }
+            }
+        } else {
+            PlayerListItemUpdate update = (PlayerListItemUpdate) packet;
+            for (PlayerListItem.Item item : update.getItems()) {
+                if (update.getActions().contains(PlayerListItemUpdate.Action.UPDATE_DISPLAY_NAME)) {
+                    IChatBaseComponent newDisplayName = TAB.getInstance().getFeatureManager().onDisplayNameChange(receiver, item.getUuid());
+                    if (newDisplayName != null) item.setDisplayName(((BungeeTabPlayer)receiver).getPlatform().toComponent(newDisplayName, receiver.getVersion()));
+                }
+                if (update.getActions().contains(PlayerListItemUpdate.Action.UPDATE_LATENCY)) {
+                    item.setPing(TAB.getInstance().getFeatureManager().onLatencyChange(receiver, item.getUuid(), item.getPing()));
+                }
+                if (update.getActions().contains(PlayerListItemUpdate.Action.ADD_PLAYER)) {
+                    TAB.getInstance().getFeatureManager().onEntryAdd(receiver, item.getUuid(), item.getUsername());
                 }
             }
         }
     }
 
+    @Override
+    public boolean isLogin(@NotNull Object packet) {
+        return packet instanceof Login;
+    }
+
     /**
      * Constructs new instance of the feature
      */
@@ -173,12 +205,12 @@ public class BungeePipelineInjector extends NettyPipelineInjector {
          * @param   player
          *          player to inject
          */
-        public DeserializableBungeeChannelDuplexHandler(TabPlayer player) {
+        public DeserializableBungeeChannelDuplexHandler(@NotNull TabPlayer player) {
             super(player);
         }
 
         @Override
-        public void write(ChannelHandlerContext context, Object packet, ChannelPromise channelPromise) {
+        public void write(@NotNull ChannelHandlerContext context, @NotNull Object packet, @NotNull ChannelPromise channelPromise) {
             long time = System.nanoTime();
             Object modifiedPacket = packet instanceof ByteBuf ? deserialize((ByteBuf) packet) : packet;
             TAB.getInstance().getCPUManager().addTime(TabConstants.Feature.PACKET_DESERIALIZING, TabConstants.CpuUsageCategory.BYTE_BUF, System.nanoTime()-time);
@@ -193,12 +225,18 @@ public class BungeePipelineInjector extends NettyPipelineInjector {
          *          byte buf to deserialize
          * @return  deserialized packet or input byte buf if packet is not tracked
          */
-        private @NotNull Object deserialize(@NotNull ByteBuf buf) {
+        @NotNull
+        private Object deserialize(@NotNull ByteBuf buf) {
+            if (wrapperField == null) return buf;
             int marker = buf.readerIndex();
             try {
                 int packetId = buf.readByte();
                 for (int i=0; i<extraPacketClasses.length; i++) {
-                    if (packetId == ((BungeeTabPlayer)player).getPacketId(extraPacketClasses[i])) {
+                    ChannelWrapper ch = (ChannelWrapper) wrapperField.get(((BungeeTabPlayer) player).getPlayer().getPendingConnection());
+                    if (!ch.getEncodeProtocol().TO_CLIENT.hasPacket(extraPacketClasses[i], ((ProxiedPlayer)player.getPlayer()).getPendingConnection().getVersion())) {
+                        continue;
+                    }
+                    if (packetId == getPacketId(((BungeeTabPlayer)player).getPlayer().getPendingConnection().getVersion(), extraPacketClasses[i])) {
                         DefinedPacket packet = extraPacketSuppliers[i].get();
                         packet.read(buf, null, ((ProxiedPlayer)player.getPlayer()).getPendingConnection().getVersion());
                         buf.release();
@@ -211,5 +249,20 @@ public class BungeePipelineInjector extends NettyPipelineInjector {
             buf.readerIndex(marker);
             return buf;
         }
+
+        /**
+         * Returns packet ID of specified packet on the protocol version
+         *
+         * @param   protocolVersion
+         *          Protocol version to get packet id for
+         * @param   clazz
+         *          packet class
+         * @return  packet ID
+         */
+        @SneakyThrows
+        private int getPacketId(int protocolVersion, @NotNull Class<? extends DefinedPacket> clazz) {
+            if (getId == null) return -1;
+            return (int) getId.invoke(directionData, clazz, protocolVersion);
+        }
     }
 }

bungeecord/src/main/java/me/neznamy/tab/platforms/bungeecord/BungeePlatform.java

@@ -1,54 +1,175 @@
 package me.neznamy.tab.platforms.bungeecord;
 
 import com.imaginarycode.minecraft.redisbungee.RedisBungeeAPI;
+import de.myzelyam.api.vanish.BungeeVanishAPI;
 import lombok.AllArgsConstructor;
+import lombok.Getter;
+import me.neznamy.tab.platforms.bungeecord.features.BungeeRedisSupport;
+import me.neznamy.tab.shared.ProtocolVersion;
 import me.neznamy.tab.shared.TAB;
+import me.neznamy.tab.shared.TabConstants;
+import me.neznamy.tab.shared.chat.ChatModifier;
+import me.neznamy.tab.shared.chat.EnumChatFormat;
 import me.neznamy.tab.shared.chat.IChatBaseComponent;
 import me.neznamy.tab.shared.features.injection.PipelineInjector;
 import me.neznamy.tab.shared.features.redis.RedisSupport;
+import me.neznamy.tab.shared.hook.ViaVersionHook;
+import me.neznamy.tab.shared.platform.TabPlayer;
 import me.neznamy.tab.shared.proxy.ProxyPlatform;
+import me.neznamy.tab.shared.util.ComponentCache;
 import me.neznamy.tab.shared.util.ReflectionUtils;
+import net.md_5.bungee.api.ChatColor;
 import net.md_5.bungee.api.ProxyServer;
+import net.md_5.bungee.api.chat.BaseComponent;
+import net.md_5.bungee.api.chat.ClickEvent;
+import net.md_5.bungee.api.chat.TextComponent;
 import net.md_5.bungee.api.connection.ProxiedPlayer;
+import org.bstats.bungeecord.Metrics;
+import org.bstats.charts.SimplePie;
 import org.jetbrains.annotations.NotNull;
 import org.jetbrains.annotations.Nullable;
 
+import java.io.File;
+import java.util.stream.Collectors;
+
 /**
  * BungeeCord implementation of Platform
  */
 @AllArgsConstructor
 public class BungeePlatform extends ProxyPlatform {
 
-    @NotNull private final BungeeTAB plugin;
+    /** Flag tracking plugin presence */
+    @Getter
+    private final boolean premiumVanish = ProxyServer.getInstance().getPluginManager().getPlugin("PremiumVanish") != null;
+
+    /** Component cache for better performance */
+    private final ComponentCache<IChatBaseComponent, BaseComponent> cache = new ComponentCache<>(1000, this::toComponent0);
+
+    @NotNull
+    private final BungeeTAB plugin;
 
     @Override
-    public @Nullable RedisSupport getRedisSupport() {
+    public void loadPlayers() {
+        ViaVersionHook.getInstance().printProxyWarn();
+        for (ProxiedPlayer p : ProxyServer.getInstance().getPlayers()) {
+            TAB.getInstance().addPlayer(new BungeeTabPlayer(this, p));
+        }
+    }
+
+    @Override
+    @Nullable
+    public RedisSupport getRedisSupport() {
         if (ReflectionUtils.classExists("com.imaginarycode.minecraft.redisbungee.RedisBungeeAPI") &&
                 RedisBungeeAPI.getRedisBungeeApi() != null) {
-            return new RedisBungeeSupport(plugin);
+            return new BungeeRedisSupport(plugin);
         }
         return null;
     }
 
     @Override
-    public void sendConsoleMessage(@NotNull IChatBaseComponent message) {
+    public void logInfo(@NotNull IChatBaseComponent message) {
         plugin.getLogger().info(message.toLegacyText());
     }
 
     @Override
+    public void logWarn(@NotNull IChatBaseComponent message) {
+        plugin.getLogger().warning(EnumChatFormat.RED.getFormat() + message.toLegacyText());
+    }
+
+    @Override
+    @NotNull
     public String getServerVersionInfo() {
         return "[BungeeCord] " + plugin.getProxy().getName() + " - " + plugin.getProxy().getVersion();
     }
 
     @Override
-    public void loadPlayers() {
-        for (ProxiedPlayer p : ProxyServer.getInstance().getPlayers()) {
-            TAB.getInstance().addPlayer(new BungeeTabPlayer(p));
-        }
+    public void registerListener() {
+        ProxyServer.getInstance().getPluginManager().registerListener(plugin, new BungeeEventListener());
     }
 
     @Override
-    public @Nullable PipelineInjector createPipelineInjector() {
+    public void registerCommand() {
+        ProxyServer.getInstance().getPluginManager().registerCommand(plugin, new BungeeTabCommand());
+    }
+
+    @Override
+    public void startMetrics() {
+        new Metrics(plugin, 10535).addCustomChart(new SimplePie(TabConstants.MetricsChart.GLOBAL_PLAYER_LIST_ENABLED,
+                () -> TAB.getInstance().getFeatureManager().isFeatureEnabled(TabConstants.Feature.GLOBAL_PLAYER_LIST) ? "Yes" : "No"));
+    }
+
+    @Override
+    @NotNull
+    public File getDataFolder() {
+        return plugin.getDataFolder();
+    }
+
+    @Override
+    @Nullable
+    public PipelineInjector createPipelineInjector() {
         return new BungeePipelineInjector();
     }
-}
+
+    @Override
+    public void registerChannel() {
+        ProxyServer.getInstance().registerChannel(TabConstants.PLUGIN_MESSAGE_CHANNEL_NAME);
+    }
+
+    @Override
+    public boolean canSee(@NotNull TabPlayer viewer, @NotNull TabPlayer target) {
+        //noinspection ConstantConditions
+        if (premiumVanish && BungeeVanishAPI.canSee(
+                ((BungeeTabPlayer)viewer).getPlayer(),
+                ((BungeeTabPlayer)target).getPlayer())) return true;
+        return super.canSee(viewer, target);
+    }
+
+    /**
+     * Converts internal component class to platform's component class. If the component is
+     * present in the cache, it is taken from it.
+     *
+     * @param   component
+     *          Component to convert
+     * @param   version
+     *          Game version to convert component for
+     * @return  Converted component
+     */
+    public BaseComponent toComponent(@NotNull IChatBaseComponent component, @NotNull ProtocolVersion version) {
+        return cache.get(component, version);
+    }
+
+    /**
+     * Converts internal component class to platform's component class
+     *
+     * @param   component
+     *          Component to convert
+     * @param   version
+     *          Game version to convert component for
+     * @return  Converted component
+     */
+    private BaseComponent toComponent0(@NotNull IChatBaseComponent component, @NotNull ProtocolVersion version) {
+        TextComponent textComponent = new TextComponent(component.getText());
+        ChatModifier modifier = component.getModifier();
+        if (modifier.getColor() != null) textComponent.setColor(ChatColor.of(
+                modifier.getColor().toString(version.getMinorVersion() >= 16)));
+
+        if (modifier.isBold()) textComponent.setBold(true);
+        if (modifier.isItalic()) textComponent.setItalic(true);
+        if (modifier.isObfuscated()) textComponent.setObfuscated(true);
+        if (modifier.isStrikethrough()) textComponent.setStrikethrough(true);
+        if (modifier.isUnderlined()) textComponent.setUnderlined(true);
+
+        textComponent.setFont(modifier.getFont());
+
+        if (modifier.getClickEvent() != null) {
+            textComponent.setClickEvent(new ClickEvent(
+                    ClickEvent.Action.valueOf(modifier.getClickEvent().getAction().name()),
+                    modifier.getClickEvent().getValue()
+            ));
+        }
+
+        if (!component.getExtra().isEmpty()) textComponent.setExtra(
+                component.getExtra().stream().map(c -> toComponent(c, version)).collect(Collectors.toList()));
+        return textComponent;
+    }
+}

bungeecord/src/main/java/me/neznamy/tab/platforms/bungeecord/BungeeScoreboard.java

@@ -4,11 +4,12 @@ import me.neznamy.tab.shared.ProtocolVersion;
 import me.neznamy.tab.shared.chat.EnumChatFormat;
 import me.neznamy.tab.shared.chat.IChatBaseComponent;
 import me.neznamy.tab.shared.platform.Scoreboard;
-import net.md_5.bungee.protocol.packet.ScoreboardDisplay;
-import net.md_5.bungee.protocol.packet.ScoreboardObjective;
-import net.md_5.bungee.protocol.packet.ScoreboardScore;
-import net.md_5.bungee.protocol.packet.Team;
+import net.md_5.bungee.api.chat.BaseComponent;
+import net.md_5.bungee.protocol.Either;
+import net.md_5.bungee.protocol.NumberFormat;
+import net.md_5.bungee.protocol.packet.*;
 import org.jetbrains.annotations.NotNull;
+import org.jetbrains.annotations.Nullable;
 
 import java.util.Collection;
 
@@ -19,39 +20,72 @@ import java.util.Collection;
  */
 public class BungeeScoreboard extends Scoreboard<BungeeTabPlayer> {
 
-    public BungeeScoreboard(BungeeTabPlayer player) {
+    public BungeeScoreboard(@NotNull BungeeTabPlayer player) {
         super(player);
     }
 
     @Override
-    public void setDisplaySlot(@NotNull DisplaySlot slot, @NotNull String objective) {
-        player.sendPacket(new ScoreboardDisplay((byte)slot.ordinal(), objective));
+    public void setDisplaySlot0(int slot, @NotNull String objective) {
+        player.sendPacket(new ScoreboardDisplay(slot, objective));
     }
 
     @Override
-    public void registerObjective0(@NotNull String objectiveName, @NotNull String title, boolean hearts) {
-        player.sendPacket(new ScoreboardObjective(objectiveName, jsonOrRaw(title, player.getVersion()), hearts ? ScoreboardObjective.HealthDisplay.HEARTS : ScoreboardObjective.HealthDisplay.INTEGER, (byte) 0));
+    public void registerObjective0(@NotNull String objectiveName, @NotNull String title, int display,
+                                   @Nullable IChatBaseComponent numberFormat) {
+        player.sendPacket(new ScoreboardObjective(
+                objectiveName,
+                either(title),
+                ScoreboardObjective.HealthDisplay.values()[display],
+                (byte) ObjectiveAction.REGISTER,
+                numberFormat == null ? null : new NumberFormat(NumberFormat.Type.FIXED,
+                        player.getPlatform().toComponent(numberFormat, player.getVersion()))
+        ));
     }
 
     @Override
     public void unregisterObjective0(@NotNull String objectiveName) {
-        player.sendPacket(new ScoreboardObjective(objectiveName, "", null, (byte) 1)); // Empty string to prevent kick on 1.7
+        player.sendPacket(new ScoreboardObjective(
+                objectiveName,
+                either(""), // Empty value instead of null to prevent NPE kick on 1.7
+                null,
+                (byte) ObjectiveAction.UNREGISTER,
+                null
+        ));
     }
 
     @Override
-    public void updateObjective0(@NotNull String objectiveName, @NotNull String title, boolean hearts) {
-        player.sendPacket(new ScoreboardObjective(objectiveName, jsonOrRaw(title, player.getVersion()), hearts ? ScoreboardObjective.HealthDisplay.HEARTS : ScoreboardObjective.HealthDisplay.INTEGER, (byte) 2));
+    public void updateObjective0(@NotNull String objectiveName, @NotNull String title, int display,
+                                 @Nullable IChatBaseComponent numberFormat) {
+        player.sendPacket(new ScoreboardObjective(
+                objectiveName,
+                either(title),
+                ScoreboardObjective.HealthDisplay.values()[display],
+                (byte) ObjectiveAction.UPDATE,
+                numberFormat == null ? null : new NumberFormat(NumberFormat.Type.FIXED,
+                        player.getPlatform().toComponent(numberFormat, player.getVersion()))
+        ));
     }
 
     @Override
-    public void registerTeam0(@NotNull String name, @NotNull String prefix, @NotNull String suffix, @NotNull NameVisibility visibility, @NotNull CollisionRule collision, @NotNull Collection<String> players, int options) {
+    public void registerTeam0(@NotNull String name, @NotNull String prefix, @NotNull String suffix,
+                              @NotNull NameVisibility visibility, @NotNull CollisionRule collision,
+                              @NotNull Collection<String> players, int options) {
         int color = 0;
         if (player.getVersion().getMinorVersion() >= 13) {
             color = EnumChatFormat.lastColorsOf(prefix).ordinal();
         }
-        player.sendPacket(new Team(name, (byte) 0, jsonOrRaw(name, player.getVersion()),
-                jsonOrRaw(prefix, player.getVersion()), jsonOrRaw(suffix, player.getVersion()),
-                visibility.toString(), collision.toString(), color, (byte)options, players.toArray(new String[0])));
+        player.sendPacket(new Team(
+                name,
+                (byte) TeamAction.CREATE,
+                either(name),
+                either(prefix),
+                either(suffix),
+                visibility.toString(),
+                collision.toString(),
+                color,
+                (byte)options,
+                players.toArray(new String[0])
+        ));
     }
 
     @Override
@@ -60,43 +94,54 @@ public class BungeeScoreboard extends Scoreboard<BungeeTabPlayer> {
     }
 
     @Override
-    public void updateTeam0(@NotNull String name, @NotNull String prefix, @NotNull String suffix, @NotNull NameVisibility visibility, @NotNull CollisionRule collision, int options) {
+    public void updateTeam0(@NotNull String name, @NotNull String prefix, @NotNull String suffix,
+                            @NotNull NameVisibility visibility, @NotNull CollisionRule collision, int options) {
         int color = 0;
         if (player.getVersion().getMinorVersion() >= 13) {
             color = EnumChatFormat.lastColorsOf(prefix).ordinal();
         }
-        player.sendPacket(new Team(name, (byte) 2, jsonOrRaw(name, player.getVersion()),
-                jsonOrRaw(prefix, player.getVersion()), jsonOrRaw(suffix, player.getVersion()),
-                visibility.toString(), collision.toString(), color, (byte)options, null));
+        player.sendPacket(new Team(
+                name,
+                (byte) TeamAction.UPDATE,
+                either(name),
+                either(prefix),
+                either(suffix),
+                visibility.toString(),
+                collision.toString(),
+                color,
+                (byte)options,
+                null
+        ));
     }
 
-    /**
-     * If {@code clientVersion} is &gt;= 1.13, creates a component from given text and returns
-     * it as a serialized component, which BungeeCord uses.
-     * <p>
-     * If {@code clientVersion} is &lt; 1.12, the text is returned
-     *
-     * @param   text
-     *          Text to convert
-     * @param   clientVersion
-     *          Version of player to convert text for
-     * @return  serialized component for 1.13+ clients, cut string for 1.12-
-     */
-    private String jsonOrRaw(@NotNull String text, @NotNull ProtocolVersion clientVersion) {
-        if (clientVersion.getMinorVersion() >= 13) {
-            return IChatBaseComponent.optimizedComponent(text).toString(clientVersion);
+    @Override
+    public void setScore0(@NotNull String objective, @NotNull String scoreHolder, int score,
+                          @Nullable IChatBaseComponent displayName, @Nullable IChatBaseComponent numberFormat) {
+        player.sendPacket(new ScoreboardScore(
+                scoreHolder,
+                (byte) ScoreAction.CHANGE,
+                objective,
+                score,
+                displayName == null ? null : player.getPlatform().toComponent(displayName, player.getVersion()),
+                numberFormat == null ? null : new NumberFormat(NumberFormat.Type.FIXED,
+                        player.getPlatform().toComponent(numberFormat, player.getVersion()))
+        ));
+    }
+
+    @Override
+    public void removeScore0(@NotNull String objective, @NotNull String scoreHolder) {
+        if (player.getVersion().getNetworkId() >= ProtocolVersion.V1_20_3.getNetworkId()) {
+            player.sendPacket(new ScoreboardScoreReset(scoreHolder, objective));
         } else {
-            return text;
+            player.sendPacket(new ScoreboardScore(scoreHolder, (byte) ScoreAction.REMOVE, objective, 0, null, null));
         }
     }
 
-    @Override
-    public void setScore0(@NotNull String objective, @NotNull String playerName, int score) {
-        player.sendPacket(new ScoreboardScore(playerName, (byte) 0, objective, score));
-    }
-
-    @Override
-    public void removeScore0(@NotNull String objective, @NotNull String playerName) {
-        player.sendPacket(new ScoreboardScore(playerName, (byte) 1, objective, 0));
+    private Either<String, BaseComponent> either(@NotNull String text) {
+        if (player.getVersion().getMinorVersion() >= 13) {
+            return Either.right(player.getPlatform().toComponent(IChatBaseComponent.optimizedComponent(text), player.getVersion()));
+        } else {
+            return Either.left(text);
+        }
     }
 }

bungeecord/src/main/java/me/neznamy/tab/platforms/bungeecord/BungeeTAB.java

@@ -1,33 +1,23 @@
 package me.neznamy.tab.platforms.bungeecord;
 
-import me.neznamy.tab.shared.ProtocolVersion;
 import me.neznamy.tab.shared.TAB;
-import me.neznamy.tab.shared.TabConstants;
 import me.neznamy.tab.shared.chat.EnumChatFormat;
 import me.neznamy.tab.shared.util.ReflectionUtils;
 import net.md_5.bungee.api.plugin.Plugin;
-import org.bstats.bungeecord.Metrics;
-import org.bstats.charts.SimplePie;
 
 /**
- * Main class for BungeeCord platform
+ * Main class for BungeeCord.
  */
 public class BungeeTAB extends Plugin {
 
     @Override
     public void onEnable() {
-        if (!ReflectionUtils.classExists("net.md_5.bungee.protocol.packet.PlayerListItemUpdate")) {
-            getLogger().info(EnumChatFormat.color("&cThe plugin requires BungeeCord build #1671 and up (or an equivalent fork) to work."));
+        if (!ReflectionUtils.classExists("net.md_5.bungee.protocol.packet.ScoreboardScoreReset")) {
+            getLogger().warning(EnumChatFormat.color("&cThe plugin requires BungeeCord build #1774 " +
+                    "(released on November 25th, 2023) and up (or an equivalent fork) to work."));
             return;
         }
-        getProxy().registerChannel(TabConstants.PLUGIN_MESSAGE_CHANNEL_NAME);
-        getProxy().getPluginManager().registerListener(this, new BungeeEventListener());
-        getProxy().getPluginManager().registerCommand(this, new BungeeTabCommand());
-        TAB.setInstance(new TAB(new BungeePlatform(this), ProtocolVersion.PROXY, getDataFolder()));
-        TAB.getInstance().load();
-        Metrics metrics = new Metrics(this, 10535);
-        metrics.addCustomChart(new SimplePie(TabConstants.MetricsChart.PERMISSION_SYSTEM, () -> TAB.getInstance().getGroupManager().getPermissionPlugin()));
-        metrics.addCustomChart(new SimplePie(TabConstants.MetricsChart.GLOBAL_PLAYER_LIST_ENABLED, () -> TAB.getInstance().getFeatureManager().isFeatureEnabled(TabConstants.Feature.GLOBAL_PLAYER_LIST) ? "Yes" : "No"));
+        TAB.create(new BungeePlatform(this));
     }
 
     @Override

bungeecord/src/main/java/me/neznamy/tab/platforms/bungeecord/BungeeTabCommand.java

@@ -9,8 +9,9 @@ import net.md_5.bungee.api.chat.TextComponent;
 import net.md_5.bungee.api.connection.ProxiedPlayer;
 import net.md_5.bungee.api.plugin.Command;
 import net.md_5.bungee.api.plugin.TabExecutor;
+import org.jetbrains.annotations.NotNull;
 
-import java.util.ArrayList;
+import java.util.Collections;
 
 public class BungeeTabCommand extends Command implements TabExecutor {
 
@@ -22,7 +23,7 @@ public class BungeeTabCommand extends Command implements TabExecutor {
     }
 
     @Override
-    public void execute(CommandSender sender, String[] args) {
+    public void execute(@NotNull CommandSender sender, @NotNull String[] args) {
         if (TAB.getInstance().isPluginDisabled()) {
             for (String message : TAB.getInstance().getDisabledCommand().execute(args, sender.hasPermission(TabConstants.Permission.COMMAND_RELOAD), sender.hasPermission(TabConstants.Permission.COMMAND_ALL))) {
                 sender.sendMessage(new TextComponent(EnumChatFormat.color(message)));
@@ -38,11 +39,12 @@ public class BungeeTabCommand extends Command implements TabExecutor {
     }
 
     @Override
-    public Iterable<String> onTabComplete(CommandSender sender, String[] args) {
+    @NotNull
+    public Iterable<String> onTabComplete(@NotNull CommandSender sender, @NotNull String[] args) {
         TabPlayer p = null;
         if (sender instanceof ProxiedPlayer) {
             p = TAB.getInstance().getPlayer(((ProxiedPlayer)sender).getUniqueId());
-            if (p == null) return new ArrayList<>(); //player not loaded correctly
+            if (p == null) return Collections.emptyList(); //player not loaded correctly
         }
         return TAB.getInstance().getCommand().complete(p, args);
     }

bungeecord/src/main/java/me/neznamy/tab/platforms/bungeecord/BungeeTabPlayer.java

@@ -11,61 +11,51 @@ import me.neznamy.tab.shared.TabConstants;
 import me.neznamy.tab.shared.chat.IChatBaseComponent;
 import me.neznamy.tab.shared.platform.Scoreboard;
 import me.neznamy.tab.shared.platform.TabList;
-import me.neznamy.tab.shared.platform.bossbar.BossBar;
+import me.neznamy.tab.shared.platform.BossBar;
 import me.neznamy.tab.shared.proxy.ProxyTabPlayer;
-import me.neznamy.tab.shared.util.ReflectionUtils;
-import net.md_5.bungee.api.ProxyServer;
+import net.md_5.bungee.UserConnection;
 import net.md_5.bungee.api.connection.ProxiedPlayer;
-import net.md_5.bungee.chat.ComponentSerializer;
 import net.md_5.bungee.connection.InitialHandler;
 import net.md_5.bungee.connection.LoginResult;
 import net.md_5.bungee.protocol.DefinedPacket;
 import net.md_5.bungee.protocol.Property;
-import net.md_5.bungee.protocol.Protocol;
 import org.jetbrains.annotations.NotNull;
 import org.jetbrains.annotations.Nullable;
 
-import java.lang.reflect.Method;
-
 /**
  * TabPlayer implementation for BungeeCord
  */
+@Getter
 public class BungeeTabPlayer extends ProxyTabPlayer {
 
-    /** Inaccessible bungee internals */
-    private static @Nullable Object directionData;
-    private static @Nullable Method getId;
-
-    /** Flag tracking plugin presence */
-    private static final boolean premiumVanish = ProxyServer.getInstance().getPluginManager().getPlugin("PremiumVanish") != null;
-
-    static {
-        try {
-            directionData = ReflectionUtils.setAccessible(Protocol.class.getDeclaredField("TO_CLIENT")).get(Protocol.GAME);
-            getId = ReflectionUtils.setAccessible(directionData.getClass().getDeclaredMethod("getId", Class.class, int.class));
-        } catch (ReflectiveOperationException e) {
-            TAB.getInstance().getErrorManager().criticalError("Failed to initialize bungee internal fields", e);
-        }
-    }
-
     /** Player's scoreboard */
-    @Getter private final @NotNull Scoreboard<BungeeTabPlayer> scoreboard = new BungeeScoreboard(this);
+    @NotNull
+    private final Scoreboard<BungeeTabPlayer> scoreboard = new BungeeScoreboard(this);
 
     /** Player's tab list based on version */
-    private final @NotNull TabList tabList1_7 = new BungeeTabList17(this);
-    private final @NotNull TabList tabList1_8 = new BungeeTabList18(this);
-    private final @NotNull TabList tabList1_19_3 = new BungeeTabList1193(this);
+    @NotNull
+    private final TabList tabList1_7 = new BungeeTabList17(this);
 
-    @Getter private final @NotNull BossBar bossBar = new BungeeBossBar(this);
+    @NotNull
+    private final TabList tabList1_8 = new BungeeTabList18(this);
+
+    @NotNull
+    private final TabList tabList1_19_3 = new BungeeTabList1193(this);
+
+    /** Player's boss bar view */
+    @NotNull
+    private final BossBar bossBar = new BungeeBossBar(this);
 
     /**
      * Constructs new instance for given player
      *
+     * @param   platform
+     *          Server platform
      * @param   p
      *          BungeeCord player
      */
-    public BungeeTabPlayer(@NotNull ProxiedPlayer p) {
-        super(p, p.getUniqueId(), p.getName(), p.getServer() != null ? p.getServer().getInfo().getName() : "-", -1);
+    public BungeeTabPlayer(@NotNull BungeePlatform platform, @NotNull ProxiedPlayer p) {
+        super(platform, p, p.getUniqueId(), p.getName(), p.getServer() != null ? p.getServer().getInfo().getName() : "-", -1);
     }
 
     @Override
@@ -78,44 +68,51 @@ public class BungeeTabPlayer extends ProxyTabPlayer {
         return getPlayer().getPing();
     }
 
-    public void sendPacket(@NotNull Object nmsPacket) {
-        getPlayer().unsafe().sendPacket((DefinedPacket) nmsPacket);
-    }
-
     @Override
     public void sendMessage(@NotNull IChatBaseComponent message) {
-        getPlayer().sendMessage(ComponentSerializer.parse(message.toString(getVersion())));
+        getPlayer().sendMessage(getPlatform().toComponent(message, getVersion()));
     }
 
     @Override
-    public @Nullable TabList.Skin getSkin() {
+    @Nullable
+    public TabList.Skin getSkin() {
         LoginResult loginResult = ((InitialHandler)getPlayer().getPendingConnection()).getLoginProfile();
         if (loginResult == null) return null;
         Property[] properties = loginResult.getProperties();
-        if (properties == null || properties.length == 0) return null;
+        if (properties == null || properties.length == 0) return null; //Offline mode
         return new TabList.Skin(properties[0].getValue(), properties[0].getSignature());
     }
 
     @Override
-    public @NotNull ProxiedPlayer getPlayer() {
+    @NotNull
+    public ProxiedPlayer getPlayer() {
         return (ProxiedPlayer) player;
     }
 
-    /**
-     * Returns packet ID for this player of provided packet class
-     *
-     * @param   clazz
-     *          packet class
-     * @return  packet ID
-     */
-    public int getPacketId(@NotNull Class<? extends DefinedPacket> clazz) {
-        if (getId == null) return -1;
+    @Override
+    public boolean isOnline() {
+        return getPlayer().isConnected();
+    }
+
+    @Override
+    public BungeePlatform getPlatform() {
+        return (BungeePlatform) platform;
+    }
+
+    @Override
+    public void sendPluginMessage(byte[] message) {
+        if (!getPlayer().isConnected()) return;
         try {
-            return (int) getId.invoke(directionData, clazz, getPlayer().getPendingConnection().getVersion());
-        } catch (ReflectiveOperationException e) {
-            TAB.getInstance().getErrorManager().printError("Failed to get packet id for packet " + clazz +
-                    " with client version " + getPlayer().getPendingConnection().getVersion(), e);
-            return -1;
+            getPlayer().getServer().sendData(TabConstants.PLUGIN_MESSAGE_CHANNEL_NAME, message);
+        } catch (NullPointerException BungeeCordBug) {
+            // java.lang.NullPointerException: Cannot invoke "net.md_5.bungee.protocol.MinecraftEncoder.getProtocol()" because the return value of "io.netty.channel.ChannelPipeline.get(java.lang.Class)" is null
+            //        at net.md_5.bungee.netty.ChannelWrapper.getEncodeProtocol(ChannelWrapper.java:51)
+            //        at net.md_5.bungee.ServerConnection.sendPacketQueued(ServerConnection.java:48)
+            //        at net.md_5.bungee.ServerConnection.sendData(ServerConnection.java:70)
+            if (TAB.getInstance().getConfiguration().isDebugMode()) {
+                TAB.getInstance().getErrorManager().printError("Failed to deliver plugin message to player " + getName() +
+                        " (online = " + getPlayer().isConnected() + ")", BungeeCordBug);
+            }
         }
     }
 
@@ -127,35 +124,50 @@ public class BungeeTabPlayer extends ProxyTabPlayer {
      * @return  Player's current protocol version
      */
     @Override
-    public @NotNull ProtocolVersion getVersion() {
+    @NotNull
+    public ProtocolVersion getVersion() {
         return ProtocolVersion.fromNetworkId(getPlayer().getPendingConnection().getVersion());
     }
 
     @Override
     public boolean isVanished() {
-        //noinspection ConstantConditions
-        if (premiumVanish && BungeeVanishAPI.isInvisible(getPlayer())) return true;
+        try {
+            //noinspection ConstantConditions
+            if (getPlatform().isPremiumVanish() && BungeeVanishAPI.isInvisible(getPlayer())) return true;
+        } catch (IllegalStateException ignored) {
+            // PV Bug: PremiumVanish must be enabled to use its API
+        }
         return super.isVanished();
     }
 
     @Override
-    public boolean isOnline() {
-        return getPlayer().isConnected();
+    @NotNull
+    public TabList getTabList() {
+        int version = getPlayer().getPendingConnection().getVersion();
+        if (version >= ProtocolVersion.V1_19_3.getNetworkId()) return tabList1_19_3;
+        if (version >= ProtocolVersion.V1_8.getNetworkId()) return tabList1_8;
+        return tabList1_7;
     }
 
-    @Override
-    public @NotNull TabList getTabList() {
-        return getVersion().getNetworkId() >= ProtocolVersion.V1_19_3.getNetworkId() ?
-                tabList1_19_3 : getVersion().getMinorVersion() >= 8 ? tabList1_8 : tabList1_7;
-    }
-
-    @Override
-    public void sendPluginMessage(byte[] message) {
-        if (getPlayer().getServer() == null) {
-            TAB.getInstance().getErrorManager().printError("Skipped plugin message send to " + getName() + ", because player is not" +
-                    "connected to any server (message=" + new String(message) + ")");
-            return;
+    /**
+     * Sends packet to the player. If BungeeCord supports 1.20.2+, new packet queue method is used
+     * to avoid error when sending packet in configuration phase.
+     *
+     * @param   packet
+     *          Packet to send
+     */
+    public void sendPacket(@NotNull DefinedPacket packet) {
+        if (!getPlayer().isConnected()) return;
+        try {
+            ((UserConnection)getPlayer()).sendPacketQueued(packet);
+        } catch (NullPointerException BungeeCordBug) {
+            // java.lang.NullPointerException: Cannot invoke "net.md_5.bungee.protocol.MinecraftEncoder.getProtocol()" because the return value of "io.netty.channel.ChannelPipeline.get(java.lang.Class)" is null
+            //        at net.md_5.bungee.netty.ChannelWrapper.getEncodeProtocol(ChannelWrapper.java:51)
+            //        at net.md_5.bungee.UserConnection.sendPacketQueued(UserConnection.java:194)
+            if (TAB.getInstance().getConfiguration().isDebugMode()) {
+                TAB.getInstance().getErrorManager().printError("Failed to deliver packet to player " + getName() +
+                        " (online = " + getPlayer().isConnected() + "): " + packet, BungeeCordBug);
+            }
         }
-        getPlayer().getServer().sendData(TabConstants.PLUGIN_MESSAGE_CHANNEL_NAME, message);
     }
 }

bungeecord/src/main/java/me/neznamy/tab/platforms/bungeecord/features/BungeeRedisSupport.java

@@ -1,24 +1,25 @@
-package me.neznamy.tab.platforms.bungeecord;
+package me.neznamy.tab.platforms.bungeecord.features;
 
 import com.imaginarycode.minecraft.redisbungee.RedisBungeeAPI;
 import com.imaginarycode.minecraft.redisbungee.events.PubSubMessageEvent;
 import lombok.AllArgsConstructor;
+import me.neznamy.tab.platforms.bungeecord.BungeeTAB;
 import me.neznamy.tab.shared.TabConstants;
 import me.neznamy.tab.shared.features.redis.RedisSupport;
 import net.md_5.bungee.api.ProxyServer;
 import net.md_5.bungee.api.plugin.Listener;
-import net.md_5.bungee.api.plugin.Plugin;
 import net.md_5.bungee.event.EventHandler;
 import org.jetbrains.annotations.NotNull;
 
 /**
- * Redis implementation for BungeeCord
+ * RedisBungee implementation for BungeeCord
  */
 @AllArgsConstructor
-public class RedisBungeeSupport extends RedisSupport implements Listener {
+public class BungeeRedisSupport extends RedisSupport implements Listener {
 
     /** Plugin reference for registering listener */
-    private final @NotNull Plugin plugin;
+    @NotNull
+    private final BungeeTAB plugin;
 
     @EventHandler
     public void onMessage(@NotNull PubSubMessageEvent e) {

bungeecord/src/main/java/me/neznamy/tab/platforms/bungeecord/tablist/BungeeTabList.java

@@ -0,0 +1,74 @@
+package me.neznamy.tab.platforms.bungeecord.tablist;
+
+import lombok.SneakyThrows;
+import me.neznamy.tab.platforms.bungeecord.BungeeTabPlayer;
+import me.neznamy.tab.shared.chat.IChatBaseComponent;
+import me.neznamy.tab.shared.platform.TabList;
+import me.neznamy.tab.shared.util.ReflectionUtils;
+import net.md_5.bungee.UserConnection;
+import net.md_5.bungee.protocol.Property;
+import net.md_5.bungee.protocol.packet.PlayerListHeaderFooter;
+import net.md_5.bungee.protocol.packet.PlayerListItem.Item;
+import net.md_5.bungee.tab.ServerUnique;
+import org.jetbrains.annotations.NotNull;
+
+import java.util.Collection;
+import java.util.UUID;
+
+public abstract class BungeeTabList implements TabList {
+
+    /** Player this TabList belongs to */
+    @NotNull
+    protected final BungeeTabPlayer player;
+
+    /** Pointer to UUIDs in player's TabList */
+    private final Collection<UUID> uuids;
+
+    @SneakyThrows
+    @SuppressWarnings("unchecked")
+    public BungeeTabList(@NotNull BungeeTabPlayer player) {
+        this.player = player;
+        uuids = (Collection<UUID>) ReflectionUtils.getField(ServerUnique.class, "uuids").get(((UserConnection)player.getPlayer()).getTabListHandler());
+    }
+
+    @Override
+    public void setPlayerListHeaderFooter(@NotNull IChatBaseComponent header, @NotNull IChatBaseComponent footer) {
+        player.sendPacket(new PlayerListHeaderFooter(
+                player.getPlatform().toComponent(header, player.getVersion()),
+                player.getPlatform().toComponent(footer, player.getVersion())
+        ));
+    }
+
+    @NotNull
+    public Item item(@NotNull UUID id) {
+        Item item = new Item();
+        item.setUuid(id);
+        return item;
+    }
+
+    @NotNull
+    public Item entryToItem(Entry entry) {
+        Item item = item(entry.getUniqueId());
+        if (entry.getDisplayName() != null) {
+            item.setDisplayName(player.getPlatform().toComponent(entry.getDisplayName(), player.getVersion()));
+        }
+        item.setGamemode(entry.getGameMode());
+        item.setListed(true);
+        item.setPing(entry.getLatency());
+        if (entry.getSkin() != null) {
+            item.setProperties(new Property[]{new Property(TEXTURES_PROPERTY, entry.getSkin().getValue(), entry.getSkin().getSignature())});
+        } else {
+            item.setProperties(new Property[0]);
+        }
+        item.setUsername(entry.getName());
+        return item;
+    }
+
+    public void addUuid(UUID id) {
+        uuids.add(id);
+    }
+
+    public void removeUuid(UUID id) {
+        uuids.remove(id);
+    }
+}

bungeecord/src/main/java/me/neznamy/tab/platforms/bungeecord/tablist/BungeeTabList1193.java

@@ -1,11 +1,7 @@
 package me.neznamy.tab.platforms.bungeecord.tablist;
 
-import lombok.RequiredArgsConstructor;
 import me.neznamy.tab.platforms.bungeecord.BungeeTabPlayer;
 import me.neznamy.tab.shared.chat.IChatBaseComponent;
-import me.neznamy.tab.shared.platform.TabList;
-import net.md_5.bungee.UserConnection;
-import net.md_5.bungee.protocol.Property;
 import net.md_5.bungee.protocol.packet.PlayerListItem.Item;
 import net.md_5.bungee.protocol.packet.PlayerListItemRemove;
 import net.md_5.bungee.protocol.packet.PlayerListItemUpdate;
@@ -18,26 +14,25 @@ import java.util.UUID;
 /**
  * TabList handler for 1.19.3+ players using the new tab list packets.
  * Because BungeeCord does not have a TabList API, we need to use packets.
- * They are sent using an internal BungeeCord method that keeps track of them,
- * so they are removed on server switch to secure parity with Velocity.
  */
-@RequiredArgsConstructor
-public class BungeeTabList1193 implements TabList {
+public class BungeeTabList1193 extends BungeeTabList {
 
-    /** Player this TabList belongs to */
-    private final BungeeTabPlayer player;
+    public BungeeTabList1193(@NotNull BungeeTabPlayer player) {
+        super(player);
+    }
 
     @Override
     public void removeEntry(@NotNull UUID entry) {
+        removeUuid(entry);
         PlayerListItemRemove remove = new PlayerListItemRemove();
         remove.setUuids(new UUID[]{entry});
-        ((UserConnection)player.getPlayer()).getTabListHandler().onUpdate(remove);
+        player.sendPacket(remove);
     }
 
     @Override
     public void updateDisplayName(@NotNull UUID entry, @Nullable IChatBaseComponent displayName) {
         Item item = item(entry);
-        item.setDisplayName(displayName == null ? null : displayName.toString(player.getVersion()));
+        if (displayName != null) item.setDisplayName(player.getPlatform().toComponent(displayName, player.getVersion()));
         sendPacket(EnumSet.of(PlayerListItemUpdate.Action.UPDATE_DISPLAY_NAME), item);
     }
 
@@ -57,35 +52,14 @@ public class BungeeTabList1193 implements TabList {
 
     @Override
     public void addEntry(@NotNull Entry entry) {
-        Item item = item(entry.getUniqueId());
-        if (entry.getDisplayName() != null) item.setDisplayName(entry.getDisplayName().toString(player.getVersion()));
-        item.setGamemode(entry.getGameMode());
-        item.setListed(true);
-        item.setPing(entry.getLatency());
-        if (entry.getSkin() != null) {
-            item.setProperties(new Property[]{new Property(TEXTURES_PROPERTY, entry.getSkin().getValue(), entry.getSkin().getSignature())});
-        } else {
-            item.setProperties(new Property[0]);
-        }
-        item.setUsername(entry.getName());
-        sendPacket(EnumSet.allOf(PlayerListItemUpdate.Action.class), item);
-    }
-
-    public @NotNull Item item(@NotNull UUID id) {
-        Item item = new Item();
-        item.setUuid(id);
-        return item;
+        addUuid(entry.getUniqueId());
+        sendPacket(EnumSet.allOf(PlayerListItemUpdate.Action.class), entryToItem(entry));
     }
 
     private void sendPacket(@NotNull EnumSet<PlayerListItemUpdate.Action> actions, @NotNull Item item) {
         PlayerListItemUpdate packet = new PlayerListItemUpdate();
         packet.setActions(actions);
         packet.setItems(new Item[]{item});
-        ((UserConnection)player.getPlayer()).getTabListHandler().onUpdate(packet);
-    }
-
-    @Override
-    public void setPlayerListHeaderFooter(@NotNull IChatBaseComponent header, @NotNull IChatBaseComponent footer) {
-        player.getPlayer().setTabHeader(header.toBungeeComponent(player.getVersion()), footer.toBungeeComponent(player.getVersion()));
+        player.sendPacket(packet);
     }
 }

bungeecord/src/main/java/me/neznamy/tab/platforms/bungeecord/tablist/BungeeTabList17.java

@@ -1,10 +1,8 @@
 package me.neznamy.tab.platforms.bungeecord.tablist;
 
-import lombok.RequiredArgsConstructor;
 import me.neznamy.tab.platforms.bungeecord.BungeeTabPlayer;
+import me.neznamy.tab.shared.Limitations;
 import me.neznamy.tab.shared.chat.IChatBaseComponent;
-import me.neznamy.tab.shared.platform.TabList;
-import net.md_5.bungee.UserConnection;
 import net.md_5.bungee.protocol.packet.PlayerListItem;
 import org.jetbrains.annotations.NotNull;
 import org.jetbrains.annotations.Nullable;
@@ -19,24 +17,26 @@ import java.util.UUID;
  * names are changed by removing old entry and adding a new one, which
  * requires further tracking than just the UUID.<p>
  * Because BungeeCord does not have a TabList API, we need to use packets.
- * They are sent using an internal BungeeCord method that keeps track of them,
- * so they are removed on server switch to secure parity with Velocity.
  * While BungeeCord itself does not support 1.7, some of its forks do.
  * This was tested on FlameCord fork.
  */
-@RequiredArgsConstructor
-public class BungeeTabList17 implements TabList {
-
-    /** Player this TabList belongs to */
-    private final BungeeTabPlayer player;
+public class BungeeTabList17 extends BungeeTabList {
 
     /** Because entries are identified by names and not uuids on 1.7 */
+    @NotNull
     private final Map<UUID, String> userNames = new HashMap<>();
+
+    @NotNull
     private final Map<UUID, String> displayNames = new HashMap<>();
 
+    public BungeeTabList17(@NotNull BungeeTabPlayer player) {
+        super(player);
+    }
+
     @Override
     public void removeEntry(@NotNull UUID entry) {
         if (!displayNames.containsKey(entry)) return; // Entry not tracked by TAB
+        removeUuid(entry);
         update(PlayerListItem.Action.REMOVE_PLAYER, createItem(null, displayNames.get(entry), 0));
 
         // Remove from map
@@ -62,8 +62,10 @@ public class BungeeTabList17 implements TabList {
 
     @Override
     public void addEntry(@NotNull Entry entry) {
+        addUuid(entry.getUniqueId());
         String displayNameString = entry.getDisplayName() == null ? String.valueOf(entry.getName()) : entry.getDisplayName().toLegacyText();
-        if (displayNameString.length() > 16) displayNameString = displayNameString.substring(0, 16); // 16 character limit
+        if (displayNameString.length() > Limitations.MAX_DISPLAY_NAME_LENGTH_1_7)
+            displayNameString = displayNameString.substring(0, Limitations.MAX_DISPLAY_NAME_LENGTH_1_7);
         update(PlayerListItem.Action.ADD_PLAYER, createItem(entry.getName(), displayNameString, entry.getLatency()));
 
         // Add to map
@@ -71,23 +73,23 @@ public class BungeeTabList17 implements TabList {
         displayNames.put(entry.getUniqueId(), displayNameString);
     }
 
+    @Override
+    public void setPlayerListHeaderFooter(@NotNull IChatBaseComponent header, @NotNull IChatBaseComponent footer) {
+        // Not available on 1.7
+    }
+
     private void update(@NotNull PlayerListItem.Action action, @NotNull PlayerListItem.Item item) {
         PlayerListItem packet = new PlayerListItem();
         packet.setAction(action);
         packet.setItems(new PlayerListItem.Item[]{item});
-        ((UserConnection)player.getPlayer()).getTabListHandler().onUpdate(packet);
+        player.sendPacket(packet);
     }
 
     private PlayerListItem.Item createItem(@Nullable String username, @NotNull String displayName, int latency) {
         PlayerListItem.Item item = new PlayerListItem.Item();
         item.setUsername(username);
-        item.setDisplayName(displayName);
         item.setPing(latency);
+        item.setDisplayName(player.getPlatform().toComponent(IChatBaseComponent.optimizedComponent(displayName), player.getVersion()));
         return item;
     }
-
-    @Override
-    public void setPlayerListHeaderFooter(@NotNull IChatBaseComponent header, @NotNull IChatBaseComponent footer) {
-        // Added in 1.8
-    }
 }

bungeecord/src/main/java/me/neznamy/tab/platforms/bungeecord/tablist/BungeeTabList18.java

@@ -1,11 +1,7 @@
 package me.neznamy.tab.platforms.bungeecord.tablist;
 
-import lombok.RequiredArgsConstructor;
 import me.neznamy.tab.platforms.bungeecord.BungeeTabPlayer;
 import me.neznamy.tab.shared.chat.IChatBaseComponent;
-import me.neznamy.tab.shared.platform.TabList;
-import net.md_5.bungee.UserConnection;
-import net.md_5.bungee.protocol.Property;
 import net.md_5.bungee.protocol.packet.PlayerListItem;
 import net.md_5.bungee.protocol.packet.PlayerListItem.Item;
 import org.jetbrains.annotations.NotNull;
@@ -16,24 +12,23 @@ import java.util.UUID;
 /**
  * TabList handler for players between 1.8 and 1.19.2.<p>
  * Because BungeeCord does not have a TabList API, we need to use packets.
- * They are sent using an internal BungeeCord method that keeps track of them,
- * so they are removed on server switch to secure parity with Velocity.
  */
-@RequiredArgsConstructor
-public class BungeeTabList18 implements TabList {
+public class BungeeTabList18 extends BungeeTabList {
 
-    /** Player this TabList belongs to */
-    private final BungeeTabPlayer player;
+    public BungeeTabList18(@NotNull BungeeTabPlayer player) {
+        super(player);
+    }
 
     @Override
     public void removeEntry(@NotNull UUID entry) {
+        removeUuid(entry);
         sendPacket(PlayerListItem.Action.REMOVE_PLAYER, item(entry));
     }
 
     @Override
     public void updateDisplayName(@NotNull UUID entry, @Nullable IChatBaseComponent displayName) {
         Item item = item(entry);
-        item.setDisplayName(displayName == null ? null : displayName.toString(player.getVersion()));
+        if (displayName != null) item.setDisplayName(player.getPlatform().toComponent(displayName, player.getVersion()));
         sendPacket(PlayerListItem.Action.UPDATE_DISPLAY_NAME, item);
     }
 
@@ -53,34 +48,14 @@ public class BungeeTabList18 implements TabList {
 
     @Override
     public void addEntry(@NotNull Entry entry) {
-        Item item = item(entry.getUniqueId());
-        if (entry.getDisplayName() != null) item.setDisplayName(entry.getDisplayName().toString(player.getVersion()));
-        item.setGamemode(entry.getGameMode());
-        item.setPing(entry.getLatency());
-        if (entry.getSkin() != null) {
-            item.setProperties(new Property[]{new Property(TEXTURES_PROPERTY, entry.getSkin().getValue(), entry.getSkin().getSignature())});
-        } else {
-            item.setProperties(new Property[0]);
-        }
-        item.setUsername(entry.getName());
-        sendPacket(PlayerListItem.Action.ADD_PLAYER, item);
-    }
-
-    public @NotNull Item item(@NotNull UUID id) {
-        Item item = new Item();
-        item.setUuid(id);
-        return item;
+        addUuid(entry.getUniqueId());
+        sendPacket(PlayerListItem.Action.ADD_PLAYER, entryToItem(entry));
     }
 
     private void sendPacket(@NotNull PlayerListItem.Action action, @NotNull Item item) {
         PlayerListItem packet = new PlayerListItem();
         packet.setAction(action);
         packet.setItems(new Item[]{item});
-        ((UserConnection)player.getPlayer()).getTabListHandler().onUpdate(packet);
-    }
-
-    @Override
-    public void setPlayerListHeaderFooter(@NotNull IChatBaseComponent header, @NotNull IChatBaseComponent footer) {
-        player.getPlayer().setTabHeader(header.toBungeeComponent(player.getVersion()), footer.toBungeeComponent(player.getVersion()));
+        player.sendPacket(packet);
     }
 }

fabric/build.gradle.kts

@@ -1,39 +1,4 @@
-// Versions that don't require any code changes:
-//      1.19.3, 1.19.4, 1.20, 1.20.1
-val minecraftVersion = "1.20.1"
-
-val v114 = "0.28.5+1.14"
-val v115 = "0.28.5+1.15"
-val v116 = "0.42.0+1.16"
-
-val fabricApiVersions = mapOf(
-    "1.20.1" to "0.83.0+1.20.1",
-    "1.20"   to "0.83.0+1.20",
-    "1.19.4" to "0.77.0+1.19.4",
-    "1.19.3" to "0.76.0+1.19.3",
-    "1.19.2" to "0.76.0+1.19.2",
-    "1.19.1" to "0.58.5+1.19.1",
-    "1.19"   to "0.58.0+1.19",
-    "1.18.2" to "0.76.0+1.18.2",
-    "1.18.1" to "0.46.6+1.18",
-    "1.18"   to "0.46.6+1.18",
-    "1.17.1" to "0.46.1+1.17",
-    "1.17"   to "0.46.1+1.17",
-    "1.16.5" to v116,
-    "1.16.4" to v116,
-    "1.16.3" to v116,
-    "1.16.2" to v116,
-    "1.16.1" to v116,
-    "1.16"   to v116,
-    "1.15.2" to v115,
-    "1.15.1" to v115,
-    "1.15"   to v115,
-    "1.14.4" to v114,
-    "1.14.3" to v114,
-    "1.14.2" to v114,
-    "1.14.1" to v114,
-    "1.14"   to v114,
-)
+val minecraftVersion = "1.20.3"
 
 plugins {
     id("fabric-loom")
@@ -41,38 +6,21 @@ plugins {
 
 repositories {
     // Gradle doesn't support combining settings and project repositories, so we have to re-declare all the settings repos we need
-    maven("https://repo.kryptonmc.org/releases")
+    maven("https://jitpack.io") // YamlAssist
     maven("https://repo.opencollab.dev/maven-snapshots/")
     maven("https://repo.viaversion.com/")
     maven("https://oss.sonatype.org/content/repositories/snapshots")
 }
 
 dependencies {
-    implementation(projects.shared)
-
+    api(projects.shared)
     minecraft("com.mojang:minecraft:$minecraftVersion")
     mappings(loom.officialMojangMappings())
-
-    modImplementation("net.fabricmc", "fabric-loader", "0.14.17")
-    modImplementation("me.lucko", "fabric-permissions-api", "0.2-SNAPSHOT")
-    modImplementation(fabricApi.module("fabric-api-base", fabricApiVersions[minecraftVersion]))
-    modImplementation(fabricApi.module("fabric-lifecycle-events-v1", fabricApiVersions[minecraftVersion]))
-    modImplementation(fabricApi.module("fabric-networking-api-v1", fabricApiVersions[minecraftVersion]))
-    modImplementation(fabricApi.module("fabric-entity-events-v1", fabricApiVersions[minecraftVersion]))
-    modImplementation(fabricApi.module("fabric-command-api-v${if (minecraftVersion.split(".")[1].toInt() >= 19) "2" else "1"}", fabricApiVersions[minecraftVersion]))
-}
-
-loom {
-    accessWidenerPath.set(file("src/main/resources/tab.accesswidener"))
-}
-
-tasks {
-    compileJava {
-        options.release.set(17)
-    }
-    validateAccessWidener {
-        // We don't want to validate the access wideners, as we have wideners for multiple versions, and the validation task will
-        // fail, as the classes for the old wideners don't exist in the new versions and vice versa.
-        enabled = false
-    }
-}
+    modImplementation("me.lucko:fabric-permissions-api:0.2-SNAPSHOT")
+    modImplementation("net.fabricmc:fabric-loader:0.14.17")
+    val version = "0.90.4+1.20.3"
+    modImplementation(fabricApi.module("fabric-api-base", version))
+    modImplementation(fabricApi.module("fabric-lifecycle-events-v1", version))
+    modImplementation(fabricApi.module("fabric-networking-api-v1", version))
+    modImplementation(fabricApi.module("fabric-entity-events-v1", version))
+}

fabric/src/main/java/me/neznamy/tab/platforms/fabric/FabricBossBar.java

@@ -1,53 +1,58 @@
 package me.neznamy.tab.platforms.fabric;
 
-import java.util.HashMap;
-import java.util.Map;
-import java.util.UUID;
 import lombok.RequiredArgsConstructor;
 import me.neznamy.tab.api.bossbar.BarColor;
 import me.neznamy.tab.api.bossbar.BarStyle;
 import me.neznamy.tab.shared.chat.IChatBaseComponent;
-import me.neznamy.tab.shared.platform.bossbar.BossBar;
+import me.neznamy.tab.shared.platform.BossBar;
 import net.minecraft.server.level.ServerBossEvent;
-import net.minecraft.world.BossEvent;
+import net.minecraft.world.BossEvent.BossBarColor;
+import net.minecraft.world.BossEvent.BossBarOverlay;
 import org.jetbrains.annotations.NotNull;
 
+import java.util.HashMap;
+import java.util.Map;
+import java.util.UUID;
+
 @RequiredArgsConstructor
 public class FabricBossBar implements BossBar {
 
+    @NotNull
     private final FabricTabPlayer player;
+
+    @NotNull
     private final Map<UUID, ServerBossEvent> bars = new HashMap<>();
 
     @Override
     public void create(@NotNull UUID id, @NotNull String title, float progress, @NotNull BarColor color, @NotNull BarStyle style) {
         ServerBossEvent bar = new ServerBossEvent(
-                FabricTAB.getInstance().toComponent(IChatBaseComponent.optimizedComponent(title), player.getVersion()),
-                BossEvent.BossBarColor.valueOf(color.name()),
-                BossEvent.BossBarOverlay.valueOf(style.name())
+                player.getPlatform().toComponent(IChatBaseComponent.optimizedComponent(title), player.getVersion()),
+                BossBarColor.valueOf(color.name()),
+                BossBarOverlay.valueOf(style.name())
         );
-        bar.setProgress(progress);
+        bar.setProgress(progress); // Somehow the compiled method name is same despite method being renamed in 1.17
         bars.put(id, bar);
         bar.addPlayer(player.getPlayer());
     }
 
     @Override
     public void update(@NotNull UUID id, @NotNull String title) {
-        bars.get(id).setName(FabricTAB.getInstance().toComponent(IChatBaseComponent.optimizedComponent(title), player.getVersion()));
+        bars.get(id).setName(player.getPlatform().toComponent(IChatBaseComponent.optimizedComponent(title), player.getVersion()));
     }
 
     @Override
     public void update(@NotNull UUID id, float progress) {
-        bars.get(id).setProgress(progress);
+        bars.get(id).setProgress(progress); // Somehow the compiled method name is same despite method being renamed in 1.17
     }
 
     @Override
     public void update(@NotNull UUID id, @NotNull BarStyle style) {
-        bars.get(id).setOverlay(BossEvent.BossBarOverlay.valueOf(style.name()));
+        bars.get(id).setOverlay(BossBarOverlay.valueOf(style.name()));
     }
 
     @Override
     public void update(@NotNull UUID id, @NotNull BarColor color) {
-        bars.get(id).setColor(BossEvent.BossBarColor.valueOf(color.name()));
+        bars.get(id).setColor(BossBarColor.valueOf(color.name()));
     }
 
     @Override

fabric/src/main/java/me/neznamy/tab/platforms/fabric/FabricEntityView.java

@@ -0,0 +1,106 @@
+package me.neznamy.tab.platforms.fabric;
+
+import lombok.RequiredArgsConstructor;
+import lombok.SneakyThrows;
+import me.neznamy.tab.shared.backend.EntityData;
+import me.neznamy.tab.shared.backend.Location;
+import me.neznamy.tab.shared.backend.entityview.EntityView;
+import me.neznamy.tab.shared.util.ReflectionUtils;
+import net.minecraft.network.protocol.game.ClientboundMoveEntityPacket;
+import net.minecraft.network.protocol.game.ClientboundRemoveEntitiesPacket;
+import net.minecraft.network.protocol.game.ClientboundTeleportEntityPacket;
+import net.minecraft.world.entity.decoration.ArmorStand;
+import org.jetbrains.annotations.NotNull;
+
+import java.util.UUID;
+
+@RequiredArgsConstructor
+public class FabricEntityView implements EntityView {
+
+    private final FabricTabPlayer player;
+
+    @NotNull
+    private static final ArmorStand dummyEntity = new ArmorStand(null, 0, 0, 0);
+
+    @Override
+    public void spawnEntity(int entityId, @NotNull UUID id, @NotNull Object entityType, @NotNull Location location,
+                            @NotNull EntityData data) {
+        player.sendPacket(FabricTAB.getVersion().spawnEntity(entityId, id, entityType, location));
+        updateEntityMetadata(entityId, data);
+    }
+
+    @Override
+    public void updateEntityMetadata(int entityId, @NotNull EntityData data) {
+        player.sendPacket(FabricTAB.getVersion().newEntityMetadata(entityId, data));
+    }
+
+    @Override
+    public void teleportEntity(int entityId, @NotNull Location location) {
+        dummyEntity.setId(entityId);
+        dummyEntity.setPos(location.getX(), location.getY(), location.getZ());
+        player.sendPacket(new ClientboundTeleportEntityPacket(dummyEntity));
+    }
+
+    @Override
+    public void destroyEntities(int... entities) {
+        FabricTAB.getVersion().destroyEntities(player, entities);
+    }
+
+    @Override
+    public boolean isDestroyPacket(@NotNull Object packet) {
+        return packet instanceof ClientboundRemoveEntitiesPacket;
+    }
+
+    @Override
+    public boolean isTeleportPacket(@NotNull Object packet) {
+        return packet instanceof ClientboundTeleportEntityPacket;
+    }
+
+    @Override
+    public boolean isNamedEntitySpawnPacket(@NotNull Object packet) {
+        return FabricTAB.getVersion().isSpawnPlayerPacket(packet);
+    }
+
+    @Override
+    public boolean isMovePacket(@NotNull Object packet) {
+        return packet instanceof ClientboundMoveEntityPacket;
+    }
+
+    @Override
+    public boolean isLookPacket(@NotNull Object packet) {
+        return packet instanceof ClientboundMoveEntityPacket.Rot;
+    }
+
+    @Override
+    @SneakyThrows
+    public int getTeleportEntityId(@NotNull Object teleportPacket) {
+        // Reflection because on 1.16.5 there is no getter and per-version code would only add unnecessary code
+        return ReflectionUtils.getFields(ClientboundTeleportEntityPacket.class, int.class).get(0).getInt(teleportPacket);
+    }
+
+    @Override
+    @SneakyThrows
+    public int getMoveEntityId(@NotNull Object movePacket) {
+        return (int) ReflectionUtils.getFields(ClientboundMoveEntityPacket.class, int.class).get(0).get(movePacket);
+    }
+
+    @Override
+    public int getSpawnedPlayer(@NotNull Object playerSpawnPacket) {
+        return FabricTAB.getVersion().getSpawnedPlayer(playerSpawnPacket);
+    }
+
+    @Override
+    public int[] getDestroyedEntities(@NotNull Object destroyPacket) {
+        return FabricTAB.getVersion().getDestroyedEntities(destroyPacket);
+    }
+
+    @Override
+    public boolean isBundlePacket(@NotNull Object packet) {
+        return FabricTAB.getVersion().isBundlePacket(packet);
+    }
+
+    @Override
+    public Iterable<Object> getPackets(@NotNull Object bundlePacket) {
+        return FabricTAB.getVersion().getPackets(bundlePacket);
+    }
+}

fabric/src/main/java/me/neznamy/tab/platforms/fabric/FabricEventListener.java

@@ -1,23 +1,37 @@
 package me.neznamy.tab.platforms.fabric;
 
+import me.neznamy.tab.shared.ProtocolVersion;
+import me.neznamy.tab.shared.TAB;
 import me.neznamy.tab.shared.platform.EventListener;
 import me.neznamy.tab.shared.platform.TabPlayer;
+import net.fabricmc.fabric.api.entity.event.v1.ServerEntityWorldChangeEvents;
 import net.fabricmc.fabric.api.entity.event.v1.ServerPlayerEvents;
 import net.fabricmc.fabric.api.networking.v1.ServerPlayConnectionEvents;
 import net.minecraft.server.level.ServerPlayer;
+import org.jetbrains.annotations.NotNull;
 
 public class FabricEventListener extends EventListener<ServerPlayer> {
 
     public void register() {
-        ServerPlayConnectionEvents.JOIN.register((connection, $, $$) -> join(connection.player));
         ServerPlayConnectionEvents.DISCONNECT.register((connection, $) -> quit(connection.player.getUUID()));
-        ServerPlayerEvents.AFTER_RESPAWN.register((oldPlayer, newPlayer, alive) -> replacePlayer(oldPlayer.getUUID(), newPlayer));
+        ServerPlayConnectionEvents.JOIN.register((connection, $, $$) -> join(connection.player));
+        //TODO command preprocess
+        if (ProtocolVersion.fromFriendlyName(FabricTAB.getVersion().getServerVersion()).getMinorVersion() >= 16) {
+            // Added in 1.16
+            ServerPlayerEvents.AFTER_RESPAWN.register(
+                    (oldPlayer, newPlayer, alive) -> {
+                        replacePlayer(newPlayer.getUUID(), newPlayer);
+                        // respawning from death & taking end portal in the end do not call world change event
+                        worldChange(newPlayer.getUUID(), FabricTAB.getVersion().getName(FabricTAB.getVersion().getLevel(newPlayer)));
+                    });
+            ServerEntityWorldChangeEvents.AFTER_PLAYER_CHANGE_WORLD.register(
+                    (player, origin, destination) -> worldChange(player.getUUID(), FabricTAB.getVersion().getName(destination)));
+        } // TODO else
     }
 
     @Override
-    public TabPlayer createPlayer(ServerPlayer player) {
-        return new FabricTabPlayer(player);
+    @NotNull
+    public TabPlayer createPlayer(@NotNull ServerPlayer player) {
+        return new FabricTabPlayer((FabricPlatform) TAB.getInstance().getPlatform(), player);
     }
-
-    //TODO world switch
 }

fabric/src/main/java/me/neznamy/tab/platforms/fabric/FabricPlaceholderRegistry.java

@@ -1,16 +0,0 @@
-package me.neznamy.tab.platforms.fabric;
-
-import me.neznamy.tab.api.placeholder.PlaceholderManager;
-import me.neznamy.tab.shared.TabConstants;
-import me.neznamy.tab.shared.placeholders.UniversalPlaceholderRegistry;
-import net.minecraft.server.level.ServerPlayer;
-import org.jetbrains.annotations.NotNull;
-
-public class FabricPlaceholderRegistry extends UniversalPlaceholderRegistry {
-
-    @Override
-    public void registerPlaceholders(@NotNull PlaceholderManager manager) {
-        manager.registerPlayerPlaceholder(TabConstants.Placeholder.HEALTH, 100, p -> (int) Math.ceil(((ServerPlayer) p.getPlayer()).getHealth()));
-        super.registerPlaceholders(manager);
-    }
-}

fabric/src/main/java/me/neznamy/tab/platforms/fabric/FabricPlatform.java

@@ -1,6 +1,13 @@
 package me.neznamy.tab.platforms.fabric;
 
+import lombok.Getter;
+import lombok.RequiredArgsConstructor;
+import lombok.SneakyThrows;
+import me.lucko.fabric.api.permissions.v0.Permissions;
+import me.neznamy.tab.platforms.fabric.features.FabricNameTagX;
+import me.neznamy.tab.shared.ProtocolVersion;
 import me.neznamy.tab.shared.TAB;
+import me.neznamy.tab.shared.TabConstants;
 import me.neznamy.tab.shared.backend.BackendPlatform;
 import me.neznamy.tab.shared.chat.IChatBaseComponent;
 import me.neznamy.tab.shared.features.injection.PipelineInjector;
@@ -8,59 +15,148 @@ import me.neznamy.tab.shared.features.nametags.NameTag;
 import me.neznamy.tab.shared.features.types.TabFeature;
 import me.neznamy.tab.shared.placeholders.expansion.EmptyTabExpansion;
 import me.neznamy.tab.shared.placeholders.expansion.TabExpansion;
+import me.neznamy.tab.shared.util.ReflectionUtils;
 import net.fabricmc.fabric.api.networking.v1.PlayerLookup;
-import net.minecraft.SharedConstants;
+import net.fabricmc.loader.api.FabricLoader;
+import net.minecraft.commands.CommandSourceStack;
+import net.minecraft.network.chat.Component;
 import net.minecraft.server.MinecraftServer;
 import net.minecraft.server.level.ServerPlayer;
 import org.jetbrains.annotations.NotNull;
 import org.jetbrains.annotations.Nullable;
 
-public final class FabricPlatform implements BackendPlatform {
+import java.io.File;
+
+/**
+ * Platform implementation for Fabric
+ */
+@RequiredArgsConstructor
+@Getter
+public class FabricPlatform implements BackendPlatform {
+
+    private static final boolean fabricPermissionsApi = FabricLoader.getInstance().isModLoaded("fabric-permissions-api-v0");
+
+    private final MinecraftServer server;
 
     @Override
     public void registerUnknownPlaceholder(@NotNull String identifier) {
-        TAB.getInstance().getPlaceholderManager().registerServerPlaceholder(identifier, -1, () -> identifier);
+        registerDummyPlaceholder(identifier);
     }
 
     @Override
     public void loadPlayers() {
-        for (ServerPlayer player : PlayerLookup.all(FabricTAB.getInstance().getServer())) {
-            TAB.getInstance().addPlayer(new FabricTabPlayer(player));
+        for (ServerPlayer player : PlayerLookup.all(server)) {
+            TAB.getInstance().addPlayer(new FabricTabPlayer(this, player));
         }
     }
 
     @Override
-    public void registerPlaceholders() {
-        new FabricPlaceholderRegistry().registerPlaceholders(TAB.getInstance().getPlaceholderManager());
+    @NotNull
+    public PipelineInjector createPipelineInjector() {
+        return FabricTAB.getVersion().createPipelineInjector();
     }
 
     @Override
-    public @NotNull NameTag getUnlimitedNameTags() {
-        return new NameTag();
+    @NotNull
+    public NameTag getUnlimitedNameTags() {
+        return new FabricNameTagX();
     }
 
     @Override
-    public @Nullable PipelineInjector createPipelineInjector() {
-        return null;
-    }
-
-    @Override
-    public @NotNull TabExpansion createTabExpansion() {
+    @NotNull
+    public TabExpansion createTabExpansion() {
         return new EmptyTabExpansion();
     }
 
     @Override
-    public @Nullable TabFeature getPerWorldPlayerList() {
+    @Nullable
+    public TabFeature getPerWorldPlayerList() {
         return null;
     }
 
     @Override
-    public void sendConsoleMessage(@NotNull IChatBaseComponent message) {
-        MinecraftServer.LOGGER.info("[TAB] " + message.toRawText());
+    @SneakyThrows
+    public void logInfo(@NotNull IChatBaseComponent message) {
+        Object logger = getLogger();
+        logger.getClass().getMethod("info", String.class).invoke(logger, message.toRawText());
     }
 
     @Override
+    @SneakyThrows
+    public void logWarn(@NotNull IChatBaseComponent message) {
+        Object logger = getLogger();
+        logger.getClass().getMethod("warn", String.class).invoke(logger, message.toRawText());
+    }
+
+    @SneakyThrows
+    private Object getLogger() {
+        Class<?> loggerClass;
+        if (getServerVersion().getNetworkId() >= ProtocolVersion.V1_18_2.getNetworkId()) {
+            loggerClass = Class.forName("org.slf4j.Logger");
+        } else {
+            loggerClass = Class.forName("org.apache.logging.log4j.Logger");
+        }
+        return ReflectionUtils.getFields(MinecraftServer.class, loggerClass).get(0).get(null);
+    }
+
+    @Override
+    @NotNull
     public String getServerVersionInfo() {
-        return "[Fabric] " + SharedConstants.getCurrentVersion().getName();
+        return "[Fabric] " + FabricTAB.getVersion().getServerVersion();
+    }
+
+    @Override
+    public void registerListener() {
+        new FabricEventListener().register();
+    }
+
+    @Override
+    public void registerCommand() {
+        // Event listener must be registered in main class
+    }
+
+    @Override
+    public void startMetrics() {
+        // Not available
+    }
+
+    @Override
+    @NotNull
+    public ProtocolVersion getServerVersion() {
+        return ProtocolVersion.fromFriendlyName(FabricTAB.getVersion().getServerVersion());
+    }
+
+    @Override
+    @NotNull
+    public File getDataFolder() {
+        return FabricLoader.getInstance().getConfigDir().resolve(TabConstants.PLUGIN_ID).toFile();
+    }
+
+    /**
+     * Converts internal component class to platform's component class
+     *
+     * @param   component
+     *          Component to convert
+     * @param   version
+     *          Game version to convert component for
+     * @return  Converted component
+     */
+    public Component toComponent(@NotNull IChatBaseComponent component, @NotNull ProtocolVersion version) {
+        return FabricTAB.getVersion().deserialize(component.toString(version));
+    }
+
+    @Override
+    public double getTPS() {
+        return -1; // Not available
+    }
+
+    @Override
+    public double getMSPT() {
+        return FabricTAB.getVersion().getMSPT();
+    }
+
+    public boolean hasPermission(@NotNull CommandSourceStack source, @NotNull String permission) {
+        if (source.hasPermission(4)) return true;
+        return fabricPermissionsApi && Permissions.check(source, permission);
     }
 }

fabric/src/main/java/me/neznamy/tab/platforms/fabric/FabricScoreboard.java

@@ -1,136 +1,124 @@
 package me.neznamy.tab.platforms.fabric;
 
-import java.util.Collection;
-import java.util.Objects;
-
 import me.neznamy.tab.shared.chat.EnumChatFormat;
 import me.neznamy.tab.shared.chat.IChatBaseComponent;
 import me.neznamy.tab.shared.platform.Scoreboard;
 import net.minecraft.ChatFormatting;
 import net.minecraft.network.chat.Component;
-import net.minecraft.network.protocol.game.ClientboundSetDisplayObjectivePacket;
 import net.minecraft.network.protocol.game.ClientboundSetObjectivePacket;
-import net.minecraft.network.protocol.game.ClientboundSetPlayerTeamPacket;
-import net.minecraft.network.protocol.game.ClientboundSetScorePacket;
-import net.minecraft.server.ServerScoreboard;
 import net.minecraft.world.scores.Objective;
 import net.minecraft.world.scores.PlayerTeam;
 import net.minecraft.world.scores.Team;
-import net.minecraft.world.scores.criteria.ObjectiveCriteria;
+import net.minecraft.world.scores.criteria.ObjectiveCriteria.RenderType;
 import org.jetbrains.annotations.NotNull;
+import org.jetbrains.annotations.Nullable;
+
+import java.util.Collection;
+import java.util.HashMap;
+import java.util.Map;
 
 public class FabricScoreboard extends Scoreboard<FabricTabPlayer> {
 
-    private final @NotNull net.minecraft.world.scores.Scoreboard dummyScoreboard = new net.minecraft.world.scores.Scoreboard();
-    private final @NotNull Component EMPTY_COMPONENT = Objects.requireNonNull(Component.Serializer.fromJson(IChatBaseComponent.EMPTY_COMPONENT));
+    @NotNull
+    private static final net.minecraft.world.scores.Scoreboard dummyScoreboard = new net.minecraft.world.scores.Scoreboard();
+
+    private final Map<String, Objective> objectives = new HashMap<>();
 
     public FabricScoreboard(FabricTabPlayer player) {
         super(player);
     }
 
     @Override
-    public void setDisplaySlot(@NotNull DisplaySlot slot, @NotNull String objective) {
-        player.sendPacket(
-                new ClientboundSetDisplayObjectivePacket(
-                        slot.ordinal(),
-                        new Objective(
-                                dummyScoreboard,
-                                objective,
-                                ObjectiveCriteria.DUMMY,
-                                EMPTY_COMPONENT,
-                                ObjectiveCriteria.RenderType.INTEGER
-                        )
-                )
-        );
+    public void setDisplaySlot0(int slot, @NotNull String objective) {
+        player.sendPacket(FabricTAB.getVersion().setDisplaySlot(slot, objectives.get(objective)));
     }
 
     @Override
-    public void registerObjective0(@NotNull String objectiveName, @NotNull String title, boolean hearts) {
-        player.sendPacket(
-                new ClientboundSetObjectivePacket(
-                        new Objective(
-                            dummyScoreboard,
-                            objectiveName,
-                            ObjectiveCriteria.DUMMY,
-                            FabricTAB.getInstance().toComponent(IChatBaseComponent.optimizedComponent(title), player.getVersion()),
-                            hearts ? ObjectiveCriteria.RenderType.HEARTS : ObjectiveCriteria.RenderType.INTEGER
-                        ),
-                        0
-                )
+    public void registerObjective0(@NotNull String objectiveName, @NotNull String title, int display,
+                                   @Nullable IChatBaseComponent numberFormat) {
+        Objective obj = FabricTAB.getVersion().newObjective(
+                objectiveName,
+                toComponent(title),
+                RenderType.values()[display],
+                numberFormat == null ? null : toComponent(numberFormat)
         );
+        objectives.put(objectiveName, obj);
+        player.sendPacket(new ClientboundSetObjectivePacket(obj, ObjectiveAction.REGISTER));
     }
 
     @Override
     public void unregisterObjective0(@NotNull String objectiveName) {
-        player.sendPacket(
-                new ClientboundSetObjectivePacket(
-                        new Objective(
-                                dummyScoreboard,
-                                objectiveName,
-                                ObjectiveCriteria.DUMMY,
-                                EMPTY_COMPONENT,
-                                ObjectiveCriteria.RenderType.INTEGER
-                        ),
-                        1
-                )
-        );
+        player.sendPacket(new ClientboundSetObjectivePacket(objectives.remove(objectiveName), ObjectiveAction.UNREGISTER));
     }
 
     @Override
-    public void updateObjective0(@NotNull String objectiveName, @NotNull String title, boolean hearts) {
-        player.sendPacket(
-                new ClientboundSetObjectivePacket(
-                        new Objective(
-                            dummyScoreboard,
-                            objectiveName,
-                            ObjectiveCriteria.DUMMY,
-                            FabricTAB.getInstance().toComponent(IChatBaseComponent.optimizedComponent(title), player.getVersion()),
-                            hearts ? ObjectiveCriteria.RenderType.HEARTS : ObjectiveCriteria.RenderType.INTEGER
-                        ),
-                        2
-                )
-        );
+    public void updateObjective0(@NotNull String objectiveName, @NotNull String title, int display,
+                                 @Nullable IChatBaseComponent numberFormat) {
+        Objective obj = objectives.get(objectiveName);
+        obj.setDisplayName(toComponent(title));
+        obj.setRenderType(RenderType.values()[display]);
+        player.sendPacket(new ClientboundSetObjectivePacket(obj, ObjectiveAction.UPDATE));
     }
 
     @Override
-    public void registerTeam0(@NotNull String name, @NotNull String prefix, @NotNull String suffix, @NotNull NameVisibility visibility, @NotNull CollisionRule collision, @NotNull Collection<String> players, int options) {
+    public void registerTeam0(@NotNull String name, @NotNull String prefix, @NotNull String suffix,
+                              @NotNull NameVisibility visibility, @NotNull CollisionRule collision,
+                              @NotNull Collection<String> players, int options) {
         PlayerTeam team = new PlayerTeam(dummyScoreboard, name);
         team.setAllowFriendlyFire((options & 0x01) > 0);
         team.setSeeFriendlyInvisibles((options & 0x02) > 0);
         team.setColor(ChatFormatting.valueOf(EnumChatFormat.lastColorsOf(prefix).name()));
         team.setCollisionRule(Team.CollisionRule.valueOf(collision.name()));
         team.setNameTagVisibility(Team.Visibility.valueOf(visibility.name()));
-        team.setPlayerPrefix(FabricTAB.getInstance().toComponent(IChatBaseComponent.optimizedComponent(prefix), player.getVersion()));
-        team.setPlayerSuffix(FabricTAB.getInstance().toComponent(IChatBaseComponent.optimizedComponent(suffix), player.getVersion()));
+        team.setPlayerPrefix(toComponent(prefix));
+        team.setPlayerSuffix(toComponent(suffix));
         team.getPlayers().addAll(players);
-        player.sendPacket(ClientboundSetPlayerTeamPacket.createAddOrModifyPacket(team, true));
+        player.sendPacket(FabricTAB.getVersion().registerTeam(team));
     }
 
     @Override
     public void unregisterTeam0(@NotNull String name) {
-        player.sendPacket(ClientboundSetPlayerTeamPacket.createRemovePacket(new PlayerTeam(dummyScoreboard, name)));
+        player.sendPacket(FabricTAB.getVersion().unregisterTeam(new PlayerTeam(dummyScoreboard, name)));
     }
 
     @Override
-    public void updateTeam0(@NotNull String name, @NotNull String prefix, @NotNull String suffix, @NotNull NameVisibility visibility, @NotNull CollisionRule collision, int options) {
+    public void updateTeam0(@NotNull String name, @NotNull String prefix, @NotNull String suffix,
+                            @NotNull NameVisibility visibility, @NotNull CollisionRule collision, int options) {
         PlayerTeam team = new PlayerTeam(dummyScoreboard, name);
-        team.setAllowFriendlyFire((options & 0x01) > 0);
-        team.setSeeFriendlyInvisibles((options & 0x02) > 0);
+        team.setAllowFriendlyFire((options & 0x01) != 0);
+        team.setSeeFriendlyInvisibles((options & 0x02) != 0);
         team.setColor(ChatFormatting.valueOf(EnumChatFormat.lastColorsOf(prefix).name()));
         team.setCollisionRule(Team.CollisionRule.valueOf(collision.name()));
         team.setNameTagVisibility(Team.Visibility.valueOf(visibility.name()));
-        team.setPlayerPrefix(FabricTAB.getInstance().toComponent(IChatBaseComponent.optimizedComponent(prefix), player.getVersion()));
-        team.setPlayerSuffix(FabricTAB.getInstance().toComponent(IChatBaseComponent.optimizedComponent(suffix), player.getVersion()));
-        player.sendPacket(ClientboundSetPlayerTeamPacket.createAddOrModifyPacket(team, false));
+        team.setPlayerPrefix(toComponent(prefix));
+        team.setPlayerSuffix(toComponent(suffix));
+        player.sendPacket(FabricTAB.getVersion().updateTeam(team));
     }
 
     @Override
-    public void setScore0(@NotNull String objective, @NotNull String playerName, int score) {
-        player.sendPacket(new ClientboundSetScorePacket(ServerScoreboard.Method.CHANGE, objective, playerName, score));
+    public void setScore0(@NotNull String objective, @NotNull String scoreHolder, int score,
+                          @Nullable IChatBaseComponent displayName, @Nullable IChatBaseComponent numberFormat) {
+        player.sendPacket(FabricTAB.getVersion().setScore(
+                objective,
+                scoreHolder,
+                score,
+                displayName == null ? null : toComponent(displayName),
+                numberFormat == null ? null : toComponent(numberFormat)
+        ));
     }
 
     @Override
-    public void removeScore0(@NotNull String objective, @NotNull String playerName) {
-        player.sendPacket(new ClientboundSetScorePacket(ServerScoreboard.Method.REMOVE, objective, playerName, 0));
+    public void removeScore0(@NotNull String objective, @NotNull String scoreHolder) {
+        player.sendPacket(FabricTAB.getVersion().removeScore(objective, scoreHolder));
+    }
+
+    @NotNull
+    private Component toComponent(@NotNull String string) {
+        return toComponent(IChatBaseComponent.optimizedComponent(string));
+    }
+
+    @NotNull
+    private Component toComponent(@NotNull IChatBaseComponent component) {
+        return player.getPlatform().toComponent(component, player.getVersion());
     }
 }

fabric/src/main/java/me/neznamy/tab/platforms/fabric/FabricTAB.java

@@ -1,54 +1,40 @@
 package me.neznamy.tab.platforms.fabric;
 
 import lombok.Getter;
-import me.lucko.fabric.api.permissions.v0.Permissions;
-import me.neznamy.tab.shared.ProtocolVersion;
 import me.neznamy.tab.shared.TAB;
-import me.neznamy.tab.shared.TabConstants;
-import me.neznamy.tab.shared.chat.IChatBaseComponent;
-import me.neznamy.tab.shared.util.ComponentCache;
 import net.fabricmc.api.DedicatedServerModInitializer;
-import net.fabricmc.fabric.api.command.v2.CommandRegistrationCallback;
 import net.fabricmc.fabric.api.event.lifecycle.v1.ServerLifecycleEvents;
-import net.fabricmc.loader.api.FabricLoader;
-import net.minecraft.SharedConstants;
-import net.minecraft.commands.CommandSourceStack;
-import net.minecraft.network.chat.Component;
-import net.minecraft.server.MinecraftServer;
-import org.jetbrains.annotations.NotNull;
-
-import java.io.File;
 
 public class FabricTAB implements DedicatedServerModInitializer {
 
-    private final ComponentCache<IChatBaseComponent, Component> componentCache = new ComponentCache<>(1000,
-            (text, version) -> Component.Serializer.fromJson(text.toString(version)));
-
-    @Getter private static FabricTAB instance;
-    private final boolean fabricPermissionsApi = FabricLoader.getInstance().isModLoaded("fabric-permissions-api-v0");
-    @Getter private MinecraftServer server;
+    @Getter
+    private static VersionLoader version;
 
     @Override
     public void onInitializeServer() {
-        instance = this;
-        ProtocolVersion protocolVersion = ProtocolVersion.fromNetworkId(SharedConstants.getCurrentVersion().getProtocolVersion());
-        File folder = FabricLoader.getInstance().getConfigDir().resolve(TabConstants.PLUGIN_ID).toFile();
-        TAB.setInstance(new TAB(new FabricPlatform(), protocolVersion, folder));
-        new FabricEventListener().register();
-        ServerLifecycleEvents.SERVER_STARTING.register(server -> {
-            this.server = server;
-            TAB.getInstance().load();
-        });
-        ServerLifecycleEvents.SERVER_STOPPING.register(server -> TAB.getInstance().unload());
-        CommandRegistrationCallback.EVENT.register((dispatcher, $, $$) -> new FabricTabCommand().onRegisterCommands(dispatcher));
-    }
-
-    public Component toComponent(@NotNull IChatBaseComponent component, @NotNull ProtocolVersion clientVersion) {
-        return componentCache.get(component, clientVersion);
-    }
-
-    public boolean hasPermission(@NotNull CommandSourceStack source, @NotNull String permission) {
-        if (source.hasPermission(4)) return true;
-        return fabricPermissionsApi && Permissions.check(source, permission);
+        String[] modules = {
+                "v1_14_4",
+                "v1_15_2",
+                "v1_16_5",
+                "v1_17",
+                "v1_17_1",
+                "v1_18_2", // 1.18, 1.18.1, 1.18.2
+                "v1_19_2", // 1.19, 1.19.1, 1.19.2
+                "v1_19_3",
+                "v1_20_1", // 1.19.4, 1.20, 1.20.1
+                "v1_20_2",
+                "v1_20_3"
+        };
+        for (String module : modules) {
+            try {
+                version = (VersionLoader) Class.forName("me.neznamy.tab.platforms.fabric." + module + ".FabricTAB").getConstructor().newInstance();
+                if (!version.getSupportedVersions().contains(version.getServerVersion())) continue;
+                version.registerCommandCallback();
+                ServerLifecycleEvents.SERVER_STARTING.register(server -> TAB.create(new FabricPlatform(server)));
+                ServerLifecycleEvents.SERVER_STOPPING.register($ -> TAB.getInstance().unload());
+                return;
+            } catch (Throwable ignored) {}
+        }
+        throw new IllegalStateException("Your server version is marked as compatible, but a compatibility issue was found.");
     }
 }

fabric/src/main/java/me/neznamy/tab/platforms/fabric/FabricTabCommand.java

@@ -13,7 +13,6 @@ import me.neznamy.tab.shared.chat.IChatBaseComponent;
 import me.neznamy.tab.shared.platform.TabPlayer;
 import net.minecraft.commands.CommandSourceStack;
 import net.minecraft.commands.Commands;
-import net.minecraft.network.chat.Component;
 import org.jetbrains.annotations.NotNull;
 
 import java.util.Arrays;
@@ -33,6 +32,7 @@ public class FabricTabCommand {
         dispatcher.getRoot().addChild(command);
     }
 
+    @NotNull
     private String[] getArguments(@NotNull CommandContext<CommandSourceStack> context) {
         String input = context.getInput();
         int firstSpace = input.indexOf(' ');
@@ -48,10 +48,11 @@ public class FabricTabCommand {
 
     private int executeCommand(@NotNull CommandSourceStack source, @NotNull String[] args) {
         if (TAB.getInstance().isPluginDisabled()) {
-            boolean hasReloadPermission = FabricTAB.getInstance().hasPermission(source, TabConstants.Permission.COMMAND_RELOAD);
-            boolean hasAdminPermission = FabricTAB.getInstance().hasPermission(source, TabConstants.Permission.COMMAND_ALL);
+            boolean hasReloadPermission = ((FabricPlatform)TAB.getInstance().getPlatform()).hasPermission(source, TabConstants.Permission.COMMAND_RELOAD);
+            boolean hasAdminPermission = ((FabricPlatform)TAB.getInstance().getPlatform()).hasPermission(source, TabConstants.Permission.COMMAND_ALL);
             for (String message : TAB.getInstance().getDisabledCommand().execute(args, hasReloadPermission, hasAdminPermission)) {
-                source.sendSystemMessage(Component.Serializer.fromJson(IChatBaseComponent.optimizedComponent(message).toString()));
+                FabricTAB.getVersion().sendMessage(source, ((FabricPlatform)TAB.getInstance().getPlatform()).toComponent(
+                        IChatBaseComponent.optimizedComponent(message), TAB.getInstance().getServerVersion()));
             }
         } else {
             if (source.getEntity() == null) {
@@ -64,20 +65,23 @@ public class FabricTabCommand {
         return 0;
     }
 
-    private @NotNull CompletableFuture<Suggestions> getSuggestions(@NotNull CommandSourceStack source, @NotNull String[] args, @NotNull SuggestionsBuilder builder) {
+    @NotNull
+    private CompletableFuture<Suggestions> getSuggestions(@NotNull CommandSourceStack source, @NotNull String[] args,
+                                                          @NotNull SuggestionsBuilder builder) {
         TabPlayer player = null;
         if (source.getEntity() != null) {
             player = TAB.getInstance().getPlayer(source.getEntity().getUUID());
             if (player == null) return Suggestions.empty();
         }
 
-        int lastSpace = builder.getRemaining().lastIndexOf(' ');
+        SuggestionsBuilder newBuilder = builder;
+        int lastSpace = newBuilder.getRemaining().lastIndexOf(' ');
         if (lastSpace != -1) {
-            builder = builder.createOffset(lastSpace + 1 + builder.getStart());
+            newBuilder = newBuilder.createOffset(lastSpace + 1 + newBuilder.getStart());
         }
         for (String suggestion : TAB.getInstance().getCommand().complete(player, args)) {
-            builder.suggest(suggestion);
+            newBuilder.suggest(suggestion);
         }
-        return builder.buildFuture();
+        return newBuilder.buildFuture();
     }
 }

fabric/src/main/java/me/neznamy/tab/platforms/fabric/FabricTabList.java

@@ -4,72 +4,64 @@ import com.mojang.authlib.GameProfile;
 import com.mojang.authlib.properties.Property;
 import lombok.Getter;
 import lombok.RequiredArgsConstructor;
+import lombok.SneakyThrows;
 import me.neznamy.tab.shared.chat.IChatBaseComponent;
 import me.neznamy.tab.shared.platform.TabList;
 import net.minecraft.network.chat.Component;
-import net.minecraft.network.protocol.Packet;
-import net.minecraft.network.protocol.game.ClientboundPlayerInfoRemovePacket;
-import net.minecraft.network.protocol.game.ClientboundPlayerInfoUpdatePacket;
-import net.minecraft.network.protocol.game.ClientboundTabListPacket;
-import net.minecraft.world.level.GameType;
 import org.jetbrains.annotations.NotNull;
 import org.jetbrains.annotations.Nullable;
 
-import java.util.*;
+import java.util.UUID;
 
-public record FabricTabList(FabricTabPlayer player) implements TabList {
+@RequiredArgsConstructor
+public class FabricTabList implements TabList {
+
+    @NotNull
+    private final FabricTabPlayer player;
 
     @Override
     public void removeEntry(@NotNull UUID entry) {
-        player.sendPacket(new ClientboundPlayerInfoRemovePacket(Collections.singletonList(entry)));
+        player.sendPacket(FabricTAB.getVersion().build(Action.UPDATE_DISPLAY_NAME, new Builder(entry)));
     }
 
     @Override
     public void updateDisplayName(@NotNull UUID entry, @Nullable IChatBaseComponent displayName) {
-        player.sendPacket(build(EnumSet.of(ClientboundPlayerInfoUpdatePacket.Action.UPDATE_DISPLAY_NAME),
-                new Builder(entry).setDisplayName(displayName == null ? null : FabricTAB.getInstance().toComponent(displayName, player.getVersion()))));
+        player.sendPacket(FabricTAB.getVersion().build(Action.UPDATE_DISPLAY_NAME,
+                new Builder(entry).setDisplayName(displayName == null ? null : player.getPlatform().toComponent(displayName, player.getVersion()))
+        ));
     }
 
     @Override
     public void updateLatency(@NotNull UUID entry, int latency) {
-        player.sendPacket(build(EnumSet.of(ClientboundPlayerInfoUpdatePacket.Action.UPDATE_LATENCY), new Builder(entry).setLatency(latency)));
+        player.sendPacket(FabricTAB.getVersion().build(Action.UPDATE_LATENCY,
+                new Builder(entry).setLatency(latency)));
     }
 
     @Override
     public void updateGameMode(@NotNull UUID entry, int gameMode) {
-        player.sendPacket(build(EnumSet.of(ClientboundPlayerInfoUpdatePacket.Action.UPDATE_GAME_MODE), new Builder(entry).setGameMode(gameMode)));
+        player.sendPacket(FabricTAB.getVersion().build(Action.UPDATE_GAME_MODE,
+                new Builder(entry).setGameMode(gameMode)));
     }
 
     @Override
     public void addEntry(@NotNull Entry entry) {
-        player.sendPacket(build(EnumSet.allOf(ClientboundPlayerInfoUpdatePacket.Action.class), new Builder(entry.getUniqueId())
+        player.sendPacket(FabricTAB.getVersion().build(Action.ADD_PLAYER,
+                new Builder(entry.getUniqueId())
                 .setName(entry.getName())
                 .setSkin(entry.getSkin())
                 .setGameMode(entry.getGameMode())
                 .setLatency(entry.getLatency())
-                .setDisplayName(entry.getDisplayName() == null ? null : FabricTAB.getInstance().toComponent(entry.getDisplayName(), player.getVersion()))));
+                .setDisplayName(entry.getDisplayName() == null ? null : player.getPlatform().toComponent(entry.getDisplayName(), player.getVersion()))
+        ));
     }
 
     @Override
+    @SneakyThrows
     public void setPlayerListHeaderFooter(@NotNull IChatBaseComponent header, @NotNull IChatBaseComponent footer) {
-        player.getPlayer().connection.send(new ClientboundTabListPacket(
-                FabricTAB.getInstance().toComponent(header, player.getVersion()),
-                FabricTAB.getInstance().toComponent(footer, player.getVersion()))
-        );
-    }
-
-    private Packet<?> build(EnumSet<ClientboundPlayerInfoUpdatePacket.Action> actions, FabricTabList.Builder entry) {
-        ClientboundPlayerInfoUpdatePacket packet = new ClientboundPlayerInfoUpdatePacket(actions, Collections.emptyList());
-        packet.entries = Collections.singletonList(new ClientboundPlayerInfoUpdatePacket.Entry(
-                entry.getId(),
-                entry.createProfile(),
-                true,
-                entry.getLatency(),
-                GameType.byId(entry.getGameMode()),
-                entry.getDisplayName(),
-                null
+        player.sendPacket(FabricTAB.getVersion().newHeaderFooter(
+                player.getPlatform().toComponent(header, player.getVersion()),
+                player.getPlatform().toComponent(footer, player.getVersion())
         ));
-        return packet;
     }
 
     @RequiredArgsConstructor
@@ -77,37 +69,43 @@ public record FabricTabList(FabricTabPlayer player) implements TabList {
     public static class Builder {
 
         @NotNull private final UUID id;
-        @Nullable private String name;
+        @NotNull private String name = ""; // Avoid nullability issues as things are changing over versions
         @Nullable private Skin skin;
         private int latency;
         private int gameMode;
         @Nullable private Component displayName;
 
-        public Builder setName(String name) {
+        @NotNull
+        public Builder setName(@NotNull String name) {
             this.name = name;
             return this;
         }
 
-        public Builder setSkin(Skin skin) {
+        @NotNull
+        public Builder setSkin(@Nullable Skin skin) {
             this.skin = skin;
             return this;
         }
 
+        @NotNull
         public Builder setLatency(int latency) {
             this.latency = latency;
             return this;
         }
 
+        @NotNull
         public Builder setGameMode(int gameMode) {
             this.gameMode = gameMode;
             return this;
         }
 
-        public Builder setDisplayName(Component displayName) {
+        @NotNull
+        public Builder setDisplayName(@Nullable Component displayName) {
             this.displayName = displayName;
             return this;
         }
 
+        @NotNull
         public GameProfile createProfile() {
             GameProfile profile = new GameProfile(id, name);
             if (skin != null) {

fabric/src/main/java/me/neznamy/tab/platforms/fabric/FabricTabPlayer.java

@@ -1,46 +1,53 @@
 package me.neznamy.tab.platforms.fabric;
 
 import com.mojang.authlib.properties.Property;
-import java.util.Collection;
-
 import lombok.Getter;
-import me.neznamy.tab.shared.TAB;
+import me.neznamy.tab.shared.backend.BackendTabPlayer;
+import me.neznamy.tab.shared.backend.entityview.EntityView;
 import me.neznamy.tab.shared.chat.IChatBaseComponent;
-import me.neznamy.tab.shared.hook.ViaVersionHook;
-import me.neznamy.tab.shared.platform.bossbar.BossBar;
 import me.neznamy.tab.shared.platform.Scoreboard;
-import me.neznamy.tab.shared.platform.TabPlayer;
 import me.neznamy.tab.shared.platform.TabList;
+import me.neznamy.tab.shared.platform.BossBar;
 import net.minecraft.network.protocol.Packet;
 import net.minecraft.server.level.ServerPlayer;
 import org.jetbrains.annotations.NotNull;
 import org.jetbrains.annotations.Nullable;
 
-@Getter
-public class FabricTabPlayer extends TabPlayer {
+import java.util.Collection;
 
+@Getter
+public class FabricTabPlayer extends BackendTabPlayer {
+
+    @NotNull
     private final Scoreboard<FabricTabPlayer> scoreboard = new FabricScoreboard(this);
+
+    @NotNull
     private final TabList tabList = new FabricTabList(this);
+
+    @NotNull
     private final BossBar bossBar = new FabricBossBar(this);
 
-    public FabricTabPlayer(ServerPlayer player) {
-        super(player, player.getUUID(), player.getGameProfile().getName(), TAB.getInstance().getConfiguration().getServerName(),
-                "N/A", ViaVersionHook.getInstance().getPlayerVersion(player.getUUID(), player.getGameProfile().getName()), true);
+    @NotNull
+    private final EntityView entityView = new FabricEntityView(this);
+
+    public FabricTabPlayer(@NotNull FabricPlatform platform, @NotNull ServerPlayer player) {
+        super(platform, player, player.getUUID(), player.getGameProfile().getName(),
+                FabricTAB.getVersion().getName(FabricTAB.getVersion().getLevel(player)));
     }
 
     @Override
     public boolean hasPermission(@NotNull String permission) {
-        return FabricTAB.getInstance().hasPermission(getPlayer().createCommandSourceStack(), permission);
+        return getPlatform().hasPermission(getPlayer().createCommandSourceStack(), permission);
     }
 
     @Override
     public int getPing() {
-        return getPlayer().latency;
+        return FabricTAB.getVersion().getPing(getPlayer());
     }
 
     @Override
     public void sendMessage(@NotNull IChatBaseComponent message) {
-        getPlayer().sendSystemMessage(FabricTAB.getInstance().toComponent(message, getVersion()));
+        FabricTAB.getVersion().sendMessage(getPlayer(), getPlatform().toComponent(message, getVersion()));
     }
 
     @Override
@@ -54,27 +61,29 @@ public class FabricTabPlayer extends TabPlayer {
     }
 
     @Override
-    public @Nullable TabList.Skin getSkin() {
+    @Nullable
+    public TabList.Skin getSkin() {
         Collection<Property> properties = getPlayer().getGameProfile().getProperties().get(TabList.TEXTURES_PROPERTY);
-        if (properties.isEmpty()) return null;
-        Property skinProperty = properties.iterator().next();
-        return new TabList.Skin(skinProperty.getValue(), skinProperty.getSignature());
+        if (properties.isEmpty()) return null; // Offline mode
+        return FabricTAB.getVersion().propertyToSkin(properties.iterator().next());
     }
 
     @Override
-    public @NotNull ServerPlayer getPlayer() {
+    @NotNull
+    public ServerPlayer getPlayer() {
         return (ServerPlayer) player;
     }
 
-    public void sendPacket(Packet<?> packet) {
-        getPlayer().connection.send(packet);
-    }
-
     @Override
     public boolean isOnline() {
         return true;
     }
 
+    @Override
+    public FabricPlatform getPlatform() {
+        return (FabricPlatform) platform;
+    }
+
     @Override
     public boolean isVanished() {
         return false;
@@ -84,4 +93,25 @@ public class FabricTabPlayer extends TabPlayer {
     public int getGamemode() {
         return getPlayer().gameMode.getGameModeForPlayer().getId();
     }
+
+    @Override
+    public double getHealth() {
+        return getPlayer().getHealth();
+    }
+
+    @Override
+    @NotNull
+    public String getDisplayName() {
+        return getPlayer().getDisplayName().getString(); // Will make it work properly if someone asks
+    }
+
+    /**
+     * Sends packet to the player
+     *
+     * @param   packet
+     *          Packet to send
+     */
+    public void sendPacket(@NotNull Packet<?> packet) {
+        getPlayer().connection.send(packet);
+    }
 }

fabric/src/main/java/me/neznamy/tab/platforms/fabric/VersionLoader.java

@@ -0,0 +1,90 @@
+package me.neznamy.tab.platforms.fabric;
+
+import com.mojang.authlib.properties.Property;
+import me.neznamy.tab.shared.backend.EntityData;
+import me.neznamy.tab.shared.backend.Location;
+import me.neznamy.tab.shared.features.injection.PipelineInjector;
+import me.neznamy.tab.shared.platform.TabList;
+import me.neznamy.tab.shared.platform.TabPlayer;
+import net.minecraft.commands.CommandSourceStack;
+import net.minecraft.network.chat.Component;
+import net.minecraft.network.protocol.Packet;
+import net.minecraft.server.level.ServerPlayer;
+import net.minecraft.world.entity.decoration.ArmorStand;
+import net.minecraft.world.level.Level;
+import net.minecraft.world.scores.Objective;
+import net.minecraft.world.scores.PlayerTeam;
+import net.minecraft.world.scores.Scoreboard;
+import net.minecraft.world.scores.criteria.ObjectiveCriteria.RenderType;
+import org.jetbrains.annotations.Nullable;
+
+import java.util.List;
+import java.util.UUID;
+
+public interface VersionLoader {
+
+    Scoreboard dummyScoreboard = new Scoreboard();
+    ArmorStand dummyEntity = new ArmorStand(null, 0, 0, 0);
+
+    String getName(Level level);
+
+    int getPing(ServerPlayer player);
+
+    void sendMessage(ServerPlayer player, Component message);
+
+    TabList.Skin propertyToSkin(Property property);
+
+    void sendMessage(CommandSourceStack sender, Component message);
+
+    String getServerVersion();
+
+    double getMSPT();
+
+    Component deserialize(String string);
+
+    Packet<?> build(TabList.Action action, FabricTabList.Builder entry);
+
+    Level getLevel(ServerPlayer player);
+
+    boolean isSneaking(ServerPlayer player);
+
+    EntityData createDataWatcher(TabPlayer viewer, byte flags, String displayName, boolean nameVisible);
+
+    Packet<?> spawnEntity(int entityId, UUID id, Object entityType, Location location);
+
+    Packet<?> newEntityMetadata(int entityId, EntityData data);
+
+    boolean isSpawnPlayerPacket(Object packet);
+
+    int getSpawnedPlayer(Object spawnPacket);
+
+    int[] getDestroyedEntities(Object entityDestroyPacket);
+
+    boolean isBundlePacket(Object packet);
+
+    Iterable<Object> getPackets(Object bundlePacket);
+
+    PipelineInjector createPipelineInjector();
+
+    void destroyEntities(FabricTabPlayer player, int... entities);
+
+    void registerCommandCallback();
+
+    List<String> getSupportedVersions();
+
+    Packet<?> newHeaderFooter(Component header, Component footer);
+
+    Packet<?> setDisplaySlot(int slot, Objective objective);
+
+    Objective newObjective(String name, Component displayName, RenderType renderType, @Nullable Component numberFormat);
+
+    Packet<?> registerTeam(PlayerTeam team);
+
+    Packet<?> unregisterTeam(PlayerTeam team);
+
+    Packet<?> updateTeam(PlayerTeam team);
+
+    Packet<?> setScore(String objective, String scoreHolder, int score, Component displayName, @Nullable Component numberFormat);
+
+    Packet<?> removeScore(String objective, String scoreHolder);
+}

fabric/src/main/java/me/neznamy/tab/platforms/fabric/features/FabricNameTagX.java

@@ -0,0 +1,135 @@
+package me.neznamy.tab.platforms.fabric.features;
+
+import me.neznamy.tab.platforms.fabric.FabricTAB;
+import me.neznamy.tab.platforms.fabric.FabricTabPlayer;
+import me.neznamy.tab.shared.TAB;
+import me.neznamy.tab.shared.backend.EntityData;
+import me.neznamy.tab.shared.backend.features.unlimitedtags.BackendNameTagX;
+import me.neznamy.tab.shared.platform.TabPlayer;
+import net.fabricmc.fabric.api.entity.event.v1.ServerPlayerEvents;
+import net.minecraft.world.entity.Entity;
+import net.minecraft.world.entity.EntityType;
+import net.minecraft.world.phys.Vec3;
+import org.jetbrains.annotations.NotNull;
+import org.jetbrains.annotations.Nullable;
+
+import java.util.List;
+import java.util.stream.Collectors;
+
+public class FabricNameTagX extends BackendNameTagX {
+
+    public boolean enabled = true;
+
+    public FabricNameTagX() {
+        if (TAB.getInstance().getServerVersion().getMinorVersion() >= 16) {
+            // Added in 1.16
+            ServerPlayerEvents.AFTER_RESPAWN.register((oldPlayer, newPlayer, alive) -> {
+                if (enabled) respawn(oldPlayer.getUUID());
+            });
+        } // TODO else
+        // TODO sneaking
+    }
+
+    @Override
+    public double getDistance(@NotNull TabPlayer player1, @NotNull TabPlayer player2) {
+        Vec3 loc1 = ((FabricTabPlayer)player1).getPlayer().position();
+        Vec3 loc2 = ((FabricTabPlayer)player2).getPlayer().position();
+        return Math.sqrt(Math.pow(loc1.x-loc2.x, 2) + Math.pow(loc1.z-loc2.z, 2));
+    }
+
+    @Override
+    public boolean areInSameWorld(@NotNull TabPlayer player1, @NotNull TabPlayer player2) {
+        return FabricTAB.getVersion().getLevel(((FabricTabPlayer)player1).getPlayer()) ==
+                FabricTAB.getVersion().getLevel(((FabricTabPlayer)player2).getPlayer());
+    }
+
+    @Override
+    public boolean canSee(@NotNull TabPlayer viewer, @NotNull TabPlayer target) {
+        return true;
+    }
+
+    @Override
+    public void unregisterListener() {
+        enabled = false;
+    }
+
+    @Override
+    @NotNull
+    public List<Integer> getPassengers(@NotNull Object vehicle) {
+        return ((Entity)vehicle).getPassengers().stream().map(Entity::getId).collect(Collectors.toList());
+    }
+
+    @Override
+    @Nullable
+    public Object getVehicle(@NotNull TabPlayer player) {
+        return ((FabricTabPlayer)player).getPlayer().getVehicle();
+    }
+
+    @Override
+    public int getEntityId(@NotNull Object entity) {
+        return ((Entity)entity).getId();
+    }
+
+    @Override
+    @NotNull
+    public String getEntityType(@NotNull Object entity) {
+        return ((Entity)entity).getType().toString(); // TODO test/fix
+    }
+
+    @Override
+    public boolean isSneaking(@NotNull TabPlayer player) {
+        return FabricTAB.getVersion().isSneaking(((FabricTabPlayer)player).getPlayer());
+    }
+
+    @Override
+    public boolean isSwimming(@NotNull TabPlayer player) {
+        return ((FabricTabPlayer)player).getPlayer().isSwimming();
+    }
+
+    @Override
+    public boolean isGliding(@NotNull TabPlayer player) {
+        return false; // TODO
+    }
+
+    @Override
+    public boolean isSleeping(@NotNull TabPlayer player) {
+        return ((FabricTabPlayer)player).getPlayer().isSleeping();
+    }
+
+    @Override
+    @NotNull
+    public Object getArmorStandType() {
+        return EntityType.ARMOR_STAND;
+    }
+
+    @Override
+    public double getX(@NotNull TabPlayer player) {
+        return ((FabricTabPlayer)player).getPlayer().position().x;
+    }
+
+    @Override
+    public double getY(@NotNull Object entity) {
+        return ((Entity)entity).position().y;
+    }
+
+    @Override
+    public double getZ(@NotNull TabPlayer player) {
+        return ((FabricTabPlayer)player).getPlayer().position().z;
+    }
+
+    @Override
+    @NotNull
+    public EntityData createDataWatcher(@NotNull TabPlayer viewer, byte flags, @NotNull String displayName, boolean nameVisible) {
+        return FabricTAB.getVersion().createDataWatcher(viewer, flags, displayName, nameVisible);
+    }
+
+    @Override
+    public void runInEntityScheduler(@NotNull Object entity, @NotNull Runnable task) {
+        task.run();
+    }
+
+    @Override
+    public boolean isDead(@NotNull TabPlayer player) {
+        return !((FabricTabPlayer)player).getPlayer().isAlive();
+    }
+}

fabric/src/main/resources/fabric.mod.json

@@ -10,11 +10,18 @@
     "server": ["me.neznamy.tab.platforms.fabric.FabricTAB"]
   },
   "depends": {
-    "fabricloader": ">=0.9.0",
-    "fabric-api-base": "*"
+    "fabric-api-base": "*",
+    "minecraft": [
+      "1.14.4",
+      "1.15.2",
+      "1.16.5",
+      "1.17", "1.17.1",
+      "1.18", "1.18.1", "1.18.2",
+      "1.19", "1.19.1", "1.19.2", "1.19.3", "1.19.4",
+      "1.20", "1.20.1", "1.20.2", "1.20.3"
+    ]
   },
   "recommends": {
     "fabric-permissions-api-v0": "*"
-  },
-  "accessWidener": "tab.accesswidener"
+  }
 }

fabric/src/main/resources/tab.accesswidener

@@ -1,21 +0,0 @@
-accessWidener v1 named
-
-# new
-accessible field net/minecraft/server/MinecraftServer LOGGER Lorg/slf4j/Logger;
-mutable field net/minecraft/server/MinecraftServer LOGGER Lorg/slf4j/Logger;
-
-# old (~1.16.5-?)
-accessible field net/minecraft/server/MinecraftServer LOGGER Lorg/apache/logging/log4j/Logger;
-mutable field net/minecraft/server/MinecraftServer LOGGER Lorg/apache/logging/log4j/Logger;
-
-# 1.19.3+
-accessible field net/minecraft/network/protocol/game/ClientboundPlayerInfoUpdatePacket entries Ljava/util/List;
-mutable field net/minecraft/network/protocol/game/ClientboundPlayerInfoUpdatePacket entries Ljava/util/List;
-
-# 1.19.2-
-accessible field net/minecraft/network/protocol/game/ClientboundPlayerInfoPacket entries Ljava/util/List;
-mutable field net/minecraft/network/protocol/game/ClientboundPlayerInfoPacket entries Ljava/util/List;
-
-# 1.16.5-
-accessible field net/minecraft/network/protocol/game/ClientboundTabListPacket header Lnet/minecraft/network/chat/Component;
-accessible field net/minecraft/network/protocol/game/ClientboundTabListPacket footer Lnet/minecraft/network/chat/Component;

fabric/v1_14_4/build.gradle.kts

@@ -0,0 +1,22 @@
+plugins {
+    id("fabric-loom")
+}
+
+repositories {
+    // Gradle doesn't support combining settings and project repositories, so we have to re-declare all the settings repos we need
+    maven("https://jitpack.io") // YamlAssist
+    maven("https://repo.opencollab.dev/maven-snapshots/")
+    maven("https://repo.viaversion.com/")
+    maven("https://oss.sonatype.org/content/repositories/snapshots")
+}
+
+dependencies {
+    implementation(projects.fabric)
+    minecraft("com.mojang:minecraft:1.14.4")
+    mappings(loom.officialMojangMappings())
+    modImplementation("net.fabricmc:fabric-loader:0.14.17")
+    val fabricApiVersion = "0.28.5+1.14"
+    modImplementation(fabricApi.module("fabric-api-base", fabricApiVersion))
+    modImplementation(fabricApi.module("fabric-lifecycle-events-v1", fabricApiVersion))
+    modImplementation(fabricApi.module("fabric-command-api-v1", fabricApiVersion))
+}

fabric/v1_14_4/src/main/java/me/neznamy/tab/platforms/fabric/v1_14_4/FabricPipelineInjector.java

@@ -0,0 +1,149 @@
+package me.neznamy.tab.platforms.fabric.v1_14_4;
+
+import com.mojang.authlib.GameProfile;
+import io.netty.channel.Channel;
+import lombok.SneakyThrows;
+import me.neznamy.tab.platforms.fabric.FabricTabPlayer;
+import me.neznamy.tab.shared.TAB;
+import me.neznamy.tab.shared.TabConstants;
+import me.neznamy.tab.shared.chat.IChatBaseComponent;
+import me.neznamy.tab.shared.features.injection.NettyPipelineInjector;
+import me.neznamy.tab.shared.features.nametags.NameTag;
+import me.neznamy.tab.shared.features.sorting.Sorting;
+import me.neznamy.tab.shared.platform.TabPlayer;
+import me.neznamy.tab.shared.util.ReflectionUtils;
+import net.minecraft.network.Connection;
+import net.minecraft.network.chat.Component;
+import net.minecraft.network.protocol.game.ClientboundPlayerInfoPacket;
+import net.minecraft.network.protocol.game.ClientboundPlayerInfoPacket.Action;
+import net.minecraft.network.protocol.game.ClientboundPlayerInfoPacket.PlayerUpdate;
+import net.minecraft.network.protocol.game.ClientboundSetDisplayObjectivePacket;
+import net.minecraft.network.protocol.game.ClientboundSetObjectivePacket;
+import net.minecraft.network.protocol.game.ClientboundSetPlayerTeamPacket;
+import net.minecraft.server.network.ServerGamePacketListenerImpl;
+import org.jetbrains.annotations.NotNull;
+import org.jetbrains.annotations.Nullable;
+
+import java.lang.reflect.Field;
+import java.util.ArrayList;
+import java.util.Collection;
+import java.util.List;
+
+public class FabricPipelineInjector extends NettyPipelineInjector {
+
+    public FabricPipelineInjector() {
+        super("packet_handler");
+    }
+
+    @Override
+    @Nullable
+    @SneakyThrows
+    protected Channel getChannel(@NotNull TabPlayer player) {
+        Connection c = (Connection) ReflectionUtils.getFields(ServerGamePacketListenerImpl.class, Connection.class)
+                .get(0).get(((FabricTabPlayer)player).getPlayer().connection);
+        return (Channel) ReflectionUtils.getFields(Connection.class, Channel.class).get(0).get(c);
+    }
+
+    @Override
+    @SneakyThrows
+    public void onDisplayObjective(@NotNull TabPlayer player, @NotNull Object packet) {
+        // Getters are client only
+        int slot = ReflectionUtils.getFields(ClientboundSetDisplayObjectivePacket.class, int.class).get(0).getInt(packet);
+        String objective = (String) ReflectionUtils.getFields(ClientboundSetDisplayObjectivePacket.class, String.class).get(0).get(packet);
+        TAB.getInstance().getFeatureManager().onDisplayObjective(player, slot, objective);
+    }
+
+    @Override
+    @SneakyThrows
+    public void onObjective(@NotNull TabPlayer player, @NotNull Object packet) {
+        // Getters are client only
+        int action = ReflectionUtils.getFields(ClientboundSetObjectivePacket.class, int.class).get(0).getInt(packet);
+        String objective = (String) ReflectionUtils.getFields(ClientboundSetObjectivePacket.class, String.class).get(0).get(packet);
+        TAB.getInstance().getFeatureManager().onObjective(player, action, objective);
+    }
+
+    @Override
+    public boolean isDisplayObjective(@NotNull Object packet) {
+        return packet instanceof ClientboundSetDisplayObjectivePacket;
+    }
+
+    @Override
+    public boolean isObjective(@NotNull Object packet) {
+        return packet instanceof ClientboundSetObjectivePacket;
+    }
+
+    @Override
+    public boolean isTeam(@NotNull Object packet) {
+        return packet instanceof ClientboundSetPlayerTeamPacket;
+    }
+
+    @Override
+    public boolean isPlayerInfo(@NotNull Object packet) {
+        return packet instanceof ClientboundPlayerInfoPacket;
+    }
+
+    @Override
+    @SneakyThrows
+    @SuppressWarnings("unchecked")
+    public void onPlayerInfo(@NotNull TabPlayer receiver, @NotNull Object packet) {
+        // Getters are client only
+        Action action = (Action) ReflectionUtils.getFields(ClientboundPlayerInfoPacket.class, Action.class).get(0).get(packet);
+        List<PlayerUpdate> players = (List<PlayerUpdate>) ReflectionUtils.getFields(ClientboundPlayerInfoPacket.class, List.class).get(0).get(packet);
+        for (PlayerUpdate nmsData : players) {
+            GameProfile profile = nmsData.getProfile();
+            Field displayNameField = ReflectionUtils.getFields(PlayerUpdate.class, Component.class).get(0);
+            Field latencyField = ReflectionUtils.getFields(PlayerUpdate.class, int.class).get(0);
+            if (action == Action.UPDATE_DISPLAY_NAME) {
+                IChatBaseComponent newDisplayName = TAB.getInstance().getFeatureManager().onDisplayNameChange(receiver, profile.getId());
+                if (newDisplayName != null) displayNameField.set(nmsData, ((FabricTabPlayer)receiver).getPlatform().toComponent(newDisplayName, receiver.getVersion()));
+            }
+            if (action == Action.UPDATE_LATENCY) {
+                latencyField.set(nmsData, TAB.getInstance().getFeatureManager().onLatencyChange(receiver, profile.getId(), latencyField.getInt(nmsData)));
+            }
+            if (action == Action.ADD_PLAYER) {
+                TAB.getInstance().getFeatureManager().onEntryAdd(receiver, profile.getId(), profile.getName());
+            }
+        }
+    }
+
+    @Override
+    public boolean isLogin(@NotNull Object packet) {
+        return false;
+    }
+
+    @Override
+    @SneakyThrows
+    @SuppressWarnings("unchecked")
+    public void modifyPlayers(@NotNull Object teamPacket) {
+        if (TAB.getInstance().getNameTagManager() == null) return;
+        ClientboundSetPlayerTeamPacket packet = (ClientboundSetPlayerTeamPacket) teamPacket;
+        int action = ReflectionUtils.getInstanceFields(ClientboundSetPlayerTeamPacket.class, int.class).get(0).getInt(packet);
+        if (action == 1 || action == 2 || action == 4) return;
+        Field playersField = ReflectionUtils.getFields(ClientboundSetPlayerTeamPacket.class, Collection.class).get(0);
+        Collection<String> players = (Collection<String>) playersField.get(packet);
+        String teamName = String.valueOf(ReflectionUtils.getFields(ClientboundSetPlayerTeamPacket.class, String.class).get(0).get(packet));
+        if (players == null) return;
+        //creating a new list to prevent NoSuchFieldException in minecraft packet encoder when a player is removed
+        Collection<String> newList = new ArrayList<>();
+        for (String entry : players) {
+            TabPlayer p = getPlayer(entry);
+            if (p == null) {
+                newList.add(entry);
+                continue;
+            }
+            Sorting sorting = TAB.getInstance().getFeatureManager().getFeature(TabConstants.Feature.SORTING);
+            String expectedTeam = sorting.getShortTeamName(p);
+            if (expectedTeam == null) {
+                newList.add(entry);
+                continue;
+            }
+            if (!((NameTag)TAB.getInstance().getNameTagManager()).getDisableChecker().isDisabledPlayer(p) &&
+                    !TAB.getInstance().getNameTagManager().hasTeamHandlingPaused(p) && !teamName.equals(expectedTeam)) {
+                logTeamOverride(teamName, p.getName(), expectedTeam);
+            } else {
+                newList.add(entry);
+            }
+        }
+        playersField.set(packet, newList);
+    }
+}

fabric/v1_14_4/src/main/java/me/neznamy/tab/platforms/fabric/v1_14_4/FabricTAB.java

@@ -0,0 +1,223 @@
+package me.neznamy.tab.platforms.fabric.v1_14_4;
+
+import com.mojang.authlib.properties.Property;
+import lombok.SneakyThrows;
+import me.neznamy.tab.platforms.fabric.*;
+import me.neznamy.tab.shared.TAB;
+import me.neznamy.tab.shared.backend.EntityData;
+import me.neznamy.tab.shared.backend.Location;
+import me.neznamy.tab.shared.chat.IChatBaseComponent;
+import me.neznamy.tab.shared.features.injection.PipelineInjector;
+import me.neznamy.tab.shared.platform.Scoreboard;
+import me.neznamy.tab.shared.platform.TabList;
+import me.neznamy.tab.shared.platform.TabPlayer;
+import me.neznamy.tab.shared.util.ReflectionUtils;
+import net.fabricmc.fabric.api.command.v1.CommandRegistrationCallback;
+import net.minecraft.SharedConstants;
+import net.minecraft.commands.CommandSourceStack;
+import net.minecraft.network.chat.Component;
+import net.minecraft.network.protocol.Packet;
+import net.minecraft.network.protocol.game.*;
+import net.minecraft.network.syncher.EntityDataAccessor;
+import net.minecraft.network.syncher.EntityDataSerializers;
+import net.minecraft.network.syncher.SynchedEntityData;
+import net.minecraft.server.ServerScoreboard;
+import net.minecraft.server.level.ServerPlayer;
+import net.minecraft.world.level.GameType;
+import net.minecraft.world.level.Level;
+import net.minecraft.world.scores.Objective;
+import net.minecraft.world.scores.PlayerTeam;
+import net.minecraft.world.scores.criteria.ObjectiveCriteria;
+import org.jetbrains.annotations.Nullable;
+
+import java.lang.reflect.Field;
+import java.util.Collections;
+import java.util.List;
+import java.util.Optional;
+import java.util.UUID;
+
+public class FabricTAB implements VersionLoader {
+
+    @Override
+    public List<String> getSupportedVersions() {
+        return Collections.singletonList("1.14.4");
+    }
+
+    @Override
+    public String getName(Level level) {
+        return level.getLevelData().getLevelName() + level.dimension.getType().getFileSuffix();
+    }
+
+    @Override
+    public int getPing(ServerPlayer player) {
+        return player.latency;
+    }
+
+    @Override
+    public void sendMessage(ServerPlayer player, Component message) {
+        player.sendMessage(message);
+    }
+
+    @Override
+    public TabList.Skin propertyToSkin(Property property) {
+        return new TabList.Skin(property.getValue(), property.getSignature());
+    }
+
+    @Override
+    public void sendMessage(CommandSourceStack sender, Component message) {
+        sender.sendSuccess(message, false);
+    }
+
+    @Override
+    public String getServerVersion() {
+        return SharedConstants.getCurrentVersion().getName();
+    }
+
+    @Override
+    public double getMSPT() {
+        return ((FabricPlatform)TAB.getInstance().getPlatform()).getServer().getAverageTickTime();
+    }
+
+    @Override
+    public Component deserialize(String string) {
+        return Component.Serializer.fromJson(string);
+    }
+
+    @Override
+    @SneakyThrows
+    public Packet<?> build(TabList.Action action, FabricTabList.Builder entry) {
+        ClientboundPlayerInfoPacket packet = new ClientboundPlayerInfoPacket(ClientboundPlayerInfoPacket.Action.valueOf(action.name()), Collections.emptyList());
+        ReflectionUtils.getFields(ClientboundPlayerInfoPacket.class, List.class).get(0).set(packet,
+                Collections.singletonList(new ClientboundPlayerInfoPacket().new PlayerUpdate(
+                        entry.createProfile(),
+                        entry.getLatency(),
+                        GameType.byId(entry.getGameMode()),
+                        entry.getDisplayName()
+                )));
+        return packet;
+    }
+
+    @Override
+    public Level getLevel(ServerPlayer player) {
+        return player.level;
+    }
+
+    @Override
+    public boolean isSneaking(ServerPlayer player) {
+        return player.isSneaking();
+    }
+
+    @Override
+    public EntityData createDataWatcher(TabPlayer viewer, byte flags, String displayName, boolean nameVisible) {
+        SynchedEntityData data = new SynchedEntityData(null);
+        data.define(new EntityDataAccessor<>(0, EntityDataSerializers.BYTE), flags);
+        data.define(new EntityDataAccessor<>(2, EntityDataSerializers.OPTIONAL_COMPONENT),
+                Optional.of(((FabricTabPlayer)viewer).getPlatform().toComponent(IChatBaseComponent.optimizedComponent(displayName), viewer.getVersion())));
+        data.define(new EntityDataAccessor<>(3, EntityDataSerializers.BOOLEAN), nameVisible);
+        data.define(new EntityDataAccessor<>(13, EntityDataSerializers.BYTE), (byte)16);
+        return () -> data;
+    }
+
+    @Override
+    public Packet<?> spawnEntity(int entityId, UUID id, Object entityType, Location location) {
+        dummyEntity.setId(entityId);
+        dummyEntity.setUUID(id);
+        dummyEntity.setPos(location.getX(), location.getY(), location.getZ());
+        return new ClientboundAddMobPacket(dummyEntity);
+    }
+
+    @Override
+    public Packet<?> newEntityMetadata(int entityId, EntityData data) {
+        return new ClientboundSetEntityDataPacket(entityId, (SynchedEntityData) data.build(), true);
+    }
+
+    @Override
+    public boolean isSpawnPlayerPacket(Object packet) {
+        return packet instanceof ClientboundAddPlayerPacket;
+    }
+
+    @Override
+    @SneakyThrows
+    public int getSpawnedPlayer(Object spawnPacket) {
+        // Getter is client only
+        return ReflectionUtils.getFields(ClientboundAddPlayerPacket.class, int.class).get(0).getInt(spawnPacket);
+    }
+
+    @Override
+    @SneakyThrows
+    public int[] getDestroyedEntities(Object entityDestroyPacket) {
+        // Getter is client only
+        return (int[]) ReflectionUtils.getFields(ClientboundRemoveEntitiesPacket.class, int[].class).get(0).get(entityDestroyPacket);
+    }
+
+    @Override
+    public boolean isBundlePacket(Object packet) {
+        return false;
+    }
+
+    @Override
+    public Iterable<Object> getPackets(Object bundlePacket) {
+        return Collections.emptyList();
+    }
+
+    @Override
+    public PipelineInjector createPipelineInjector() {
+        return new FabricPipelineInjector();
+    }
+
+    @Override
+    public void destroyEntities(FabricTabPlayer player, int... entities) {
+        player.sendPacket(new ClientboundRemoveEntitiesPacket(entities));
+    }
+
+    @Override
+    public void registerCommandCallback() {
+        CommandRegistrationCallback.EVENT.register((dispatcher, $) -> new FabricTabCommand().onRegisterCommands(dispatcher));
+    }
+
+    @Override
+    @SneakyThrows
+    public Packet<?> newHeaderFooter(Component header, Component footer) {
+        ClientboundTabListPacket packet = new ClientboundTabListPacket();
+        List<Field> fields = ReflectionUtils.getFields(ClientboundTabListPacket.class, Component.class);
+        fields.get(0).set(packet, header);
+        fields.get(1).set(packet, footer);
+        return packet;
+    }
+
+    @Override
+    public Packet<?> setDisplaySlot(int slot, Objective objective) {
+        return new ClientboundSetDisplayObjectivePacket(slot, objective);
+    }
+
+    @Override
+    public Objective newObjective(String name, Component displayName, ObjectiveCriteria.RenderType renderType,
+                                  @Nullable Component numberFormat) {
+        return new Objective(dummyScoreboard, name, ObjectiveCriteria.DUMMY, displayName, renderType);
+    }
+
+    @Override
+    public Packet<?> registerTeam(PlayerTeam team) {
+        return new ClientboundSetPlayerTeamPacket(team, Scoreboard.TeamAction.CREATE);
+    }
+
+    @Override
+    public Packet<?> unregisterTeam(PlayerTeam team) {
+        return new ClientboundSetPlayerTeamPacket(team, Scoreboard.TeamAction.REMOVE);
+    }
+
+    @Override
+    public Packet<?> updateTeam(PlayerTeam team) {
+        return new ClientboundSetPlayerTeamPacket(team, Scoreboard.TeamAction.UPDATE);
+    }
+
+    @Override
+    public Packet<?> setScore(String objective, String scoreHolder, int score, Component displayName, @Nullable Component numberFormat) {
+        return new ClientboundSetScorePacket(ServerScoreboard.Method.CHANGE, objective, scoreHolder, score);
+    }
+
+    @Override
+    public Packet<?> removeScore(String objective, String scoreHolder) {
+        return new ClientboundSetScorePacket(ServerScoreboard.Method.REMOVE, objective, scoreHolder, 0);
+    }
+}

fabric/v1_15_2/build.gradle.kts

@@ -0,0 +1,22 @@
+plugins {
+    id("fabric-loom")
+}
+
+repositories {
+    // Gradle doesn't support combining settings and project repositories, so we have to re-declare all the settings repos we need
+    maven("https://jitpack.io") // YamlAssist
+    maven("https://repo.opencollab.dev/maven-snapshots/")
+    maven("https://repo.viaversion.com/")
+    maven("https://oss.sonatype.org/content/repositories/snapshots")
+}
+
+dependencies {
+    implementation(projects.fabric)
+    minecraft("com.mojang:minecraft:1.15.2")
+    mappings(loom.officialMojangMappings())
+    modImplementation("net.fabricmc:fabric-loader:0.14.17")
+    val fabricApiVersion = "0.28.5+1.15"
+    modImplementation(fabricApi.module("fabric-api-base", fabricApiVersion))
+    modImplementation(fabricApi.module("fabric-lifecycle-events-v1", fabricApiVersion))
+    modImplementation(fabricApi.module("fabric-command-api-v1", fabricApiVersion))
+}

fabric/v1_15_2/src/main/java/me/neznamy/tab/platforms/fabric/v1_15_2/FabricPipelineInjector.java

@@ -0,0 +1,149 @@
+package me.neznamy.tab.platforms.fabric.v1_15_2;
+
+import com.mojang.authlib.GameProfile;
+import io.netty.channel.Channel;
+import lombok.SneakyThrows;
+import me.neznamy.tab.platforms.fabric.FabricTabPlayer;
+import me.neznamy.tab.shared.TAB;
+import me.neznamy.tab.shared.TabConstants;
+import me.neznamy.tab.shared.chat.IChatBaseComponent;
+import me.neznamy.tab.shared.features.injection.NettyPipelineInjector;
+import me.neznamy.tab.shared.features.nametags.NameTag;
+import me.neznamy.tab.shared.features.sorting.Sorting;
+import me.neznamy.tab.shared.platform.TabPlayer;
+import me.neznamy.tab.shared.util.ReflectionUtils;
+import net.minecraft.network.Connection;
+import net.minecraft.network.chat.Component;
+import net.minecraft.network.protocol.game.ClientboundPlayerInfoPacket;
+import net.minecraft.network.protocol.game.ClientboundPlayerInfoPacket.Action;
+import net.minecraft.network.protocol.game.ClientboundPlayerInfoPacket.PlayerUpdate;
+import net.minecraft.network.protocol.game.ClientboundSetDisplayObjectivePacket;
+import net.minecraft.network.protocol.game.ClientboundSetObjectivePacket;
+import net.minecraft.network.protocol.game.ClientboundSetPlayerTeamPacket;
+import net.minecraft.server.network.ServerGamePacketListenerImpl;
+import org.jetbrains.annotations.NotNull;
+import org.jetbrains.annotations.Nullable;
+
+import java.lang.reflect.Field;
+import java.util.ArrayList;
+import java.util.Collection;
+import java.util.List;
+
+public class FabricPipelineInjector extends NettyPipelineInjector {
+
+    public FabricPipelineInjector() {
+        super("packet_handler");
+    }
+
+    @Override
+    @Nullable
+    @SneakyThrows
+    protected Channel getChannel(@NotNull TabPlayer player) {
+        Connection c = (Connection) ReflectionUtils.getFields(ServerGamePacketListenerImpl.class, Connection.class)
+                .get(0).get(((FabricTabPlayer)player).getPlayer().connection);
+        return (Channel) ReflectionUtils.getFields(Connection.class, Channel.class).get(0).get(c);
+    }
+
+    @Override
+    @SneakyThrows
+    public void onDisplayObjective(@NotNull TabPlayer player, @NotNull Object packet) {
+        // Getters are client only
+        int slot = ReflectionUtils.getFields(ClientboundSetDisplayObjectivePacket.class, int.class).get(0).getInt(packet);
+        String objective = (String) ReflectionUtils.getFields(ClientboundSetDisplayObjectivePacket.class, String.class).get(0).get(packet);
+        TAB.getInstance().getFeatureManager().onDisplayObjective(player, slot, objective);
+    }
+
+    @Override
+    @SneakyThrows
+    public void onObjective(@NotNull TabPlayer player, @NotNull Object packet) {
+        // Getters are client only
+        int action = ReflectionUtils.getFields(ClientboundSetObjectivePacket.class, int.class).get(0).getInt(packet);
+        String objective = (String) ReflectionUtils.getFields(ClientboundSetObjectivePacket.class, String.class).get(0).get(packet);
+        TAB.getInstance().getFeatureManager().onObjective(player, action, objective);
+    }
+
+    @Override
+    public boolean isDisplayObjective(@NotNull Object packet) {
+        return packet instanceof ClientboundSetDisplayObjectivePacket;
+    }
+
+    @Override
+    public boolean isObjective(@NotNull Object packet) {
+        return packet instanceof ClientboundSetObjectivePacket;
+    }
+
+    @Override
+    public boolean isTeam(@NotNull Object packet) {
+        return packet instanceof ClientboundSetPlayerTeamPacket;
+    }
+
+    @Override
+    public boolean isPlayerInfo(@NotNull Object packet) {
+        return packet instanceof ClientboundPlayerInfoPacket;
+    }
+
+    @Override
+    @SneakyThrows
+    @SuppressWarnings("unchecked")
+    public void onPlayerInfo(@NotNull TabPlayer receiver, @NotNull Object packet) {
+        // Getters are client only
+        Action action = (Action) ReflectionUtils.getFields(ClientboundPlayerInfoPacket.class, Action.class).get(0).get(packet);
+        List<PlayerUpdate> players = (List<PlayerUpdate>) ReflectionUtils.getFields(ClientboundPlayerInfoPacket.class, List.class).get(0).get(packet);
+        for (PlayerUpdate nmsData : players) {
+            GameProfile profile = nmsData.getProfile();
+            Field displayNameField = ReflectionUtils.getFields(PlayerUpdate.class, Component.class).get(0);
+            Field latencyField = ReflectionUtils.getFields(PlayerUpdate.class, int.class).get(0);
+            if (action == Action.UPDATE_DISPLAY_NAME) {
+                IChatBaseComponent newDisplayName = TAB.getInstance().getFeatureManager().onDisplayNameChange(receiver, profile.getId());
+                if (newDisplayName != null) displayNameField.set(nmsData, ((FabricTabPlayer)receiver).getPlatform().toComponent(newDisplayName, receiver.getVersion()));
+            }
+            if (action == Action.UPDATE_LATENCY) {
+                latencyField.set(nmsData, TAB.getInstance().getFeatureManager().onLatencyChange(receiver, profile.getId(), latencyField.getInt(nmsData)));
+            }
+            if (action == Action.ADD_PLAYER) {
+                TAB.getInstance().getFeatureManager().onEntryAdd(receiver, profile.getId(), profile.getName());
+            }
+        }
+    }
+
+    @Override
+    public boolean isLogin(@NotNull Object packet) {
+        return false;
+    }
+
+    @Override
+    @SneakyThrows
+    @SuppressWarnings("unchecked")
+    public void modifyPlayers(@NotNull Object teamPacket) {
+        if (TAB.getInstance().getNameTagManager() == null) return;
+        ClientboundSetPlayerTeamPacket packet = (ClientboundSetPlayerTeamPacket) teamPacket;
+        int action = ReflectionUtils.getInstanceFields(ClientboundSetPlayerTeamPacket.class, int.class).get(0).getInt(packet);
+        if (action == 1 || action == 2 || action == 4) return;
+        Field playersField = ReflectionUtils.getFields(ClientboundSetPlayerTeamPacket.class, Collection.class).get(0);
+        Collection<String> players = (Collection<String>) playersField.get(packet);
+        String teamName = String.valueOf(ReflectionUtils.getFields(ClientboundSetPlayerTeamPacket.class, String.class).get(0).get(packet));
+        if (players == null) return;
+        //creating a new list to prevent NoSuchFieldException in minecraft packet encoder when a player is removed
+        Collection<String> newList = new ArrayList<>();
+        for (String entry : players) {
+            TabPlayer p = getPlayer(entry);
+            if (p == null) {
+                newList.add(entry);
+                continue;
+            }
+            Sorting sorting = TAB.getInstance().getFeatureManager().getFeature(TabConstants.Feature.SORTING);
+            String expectedTeam = sorting.getShortTeamName(p);
+            if (expectedTeam == null) {
+                newList.add(entry);
+                continue;
+            }
+            if (!((NameTag)TAB.getInstance().getNameTagManager()).getDisableChecker().isDisabledPlayer(p) &&
+                    !TAB.getInstance().getNameTagManager().hasTeamHandlingPaused(p) && !teamName.equals(expectedTeam)) {
+                logTeamOverride(teamName, p.getName(), expectedTeam);
+            } else {
+                newList.add(entry);
+            }
+        }
+        playersField.set(packet, newList);
+    }
+}

fabric/v1_15_2/src/main/java/me/neznamy/tab/platforms/fabric/v1_15_2/FabricTAB.java

@@ -0,0 +1,220 @@
+package me.neznamy.tab.platforms.fabric.v1_15_2;
+
+import com.mojang.authlib.properties.Property;
+import lombok.SneakyThrows;
+import me.neznamy.tab.platforms.fabric.*;
+import me.neznamy.tab.shared.TAB;
+import me.neznamy.tab.shared.backend.EntityData;
+import me.neznamy.tab.shared.backend.Location;
+import me.neznamy.tab.shared.chat.IChatBaseComponent;
+import me.neznamy.tab.shared.features.injection.PipelineInjector;
+import me.neznamy.tab.shared.platform.Scoreboard;
+import me.neznamy.tab.shared.platform.TabList;
+import me.neznamy.tab.shared.platform.TabPlayer;
+import me.neznamy.tab.shared.util.ReflectionUtils;
+import net.fabricmc.fabric.api.command.v1.CommandRegistrationCallback;
+import net.minecraft.SharedConstants;
+import net.minecraft.commands.CommandSourceStack;
+import net.minecraft.network.chat.Component;
+import net.minecraft.network.protocol.Packet;
+import net.minecraft.network.protocol.game.*;
+import net.minecraft.network.syncher.EntityDataAccessor;
+import net.minecraft.network.syncher.EntityDataSerializers;
+import net.minecraft.network.syncher.SynchedEntityData;
+import net.minecraft.server.ServerScoreboard;
+import net.minecraft.server.level.ServerPlayer;
+import net.minecraft.world.level.GameType;
+import net.minecraft.world.level.Level;
+import net.minecraft.world.scores.Objective;
+import net.minecraft.world.scores.PlayerTeam;
+import net.minecraft.world.scores.criteria.ObjectiveCriteria;
+import org.jetbrains.annotations.Nullable;
+
+import java.lang.reflect.Field;
+import java.util.*;
+
+public class FabricTAB implements VersionLoader {
+
+    @Override
+    public List<String> getSupportedVersions() {
+        return Collections.singletonList("1.15.2");
+    }
+
+    @Override
+    public String getName(Level level) {
+        return level.getLevelData().getLevelName() + level.dimension.getType().getFileSuffix();
+    }
+
+    @Override
+    public int getPing(ServerPlayer player) {
+        return player.latency;
+    }
+
+    @Override
+    public void sendMessage(ServerPlayer player, Component message) {
+        player.sendMessage(message);
+    }
+
+    @Override
+    public TabList.Skin propertyToSkin(Property property) {
+        return new TabList.Skin(property.getValue(), property.getSignature());
+    }
+
+    @Override
+    public void sendMessage(CommandSourceStack sender, Component message) {
+        sender.sendSuccess(message, false);
+    }
+
+    @Override
+    public String getServerVersion() {
+        return SharedConstants.getCurrentVersion().getName();
+    }
+
+    @Override
+    public double getMSPT() {
+        return ((FabricPlatform)TAB.getInstance().getPlatform()).getServer().getAverageTickTime();
+    }
+
+    @Override
+    public Component deserialize(String string) {
+        return Component.Serializer.fromJson(string);
+    }
+
+    @Override
+    @SneakyThrows
+    public Packet<?> build(TabList.Action action, FabricTabList.Builder entry) {
+        ClientboundPlayerInfoPacket packet = new ClientboundPlayerInfoPacket(ClientboundPlayerInfoPacket.Action.valueOf(action.name()), Collections.emptyList());
+        ReflectionUtils.getFields(ClientboundPlayerInfoPacket.class, List.class).get(0).set(packet,
+                Collections.singletonList(new ClientboundPlayerInfoPacket().new PlayerUpdate(
+                        entry.createProfile(),
+                        entry.getLatency(),
+                        GameType.byId(entry.getGameMode()),
+                        entry.getDisplayName()
+                )));
+        return packet;
+    }
+
+    @Override
+    public Level getLevel(ServerPlayer player) {
+        return player.level;
+    }
+
+    @Override
+    public boolean isSneaking(ServerPlayer player) {
+        return player.isCrouching();
+    }
+
+    @Override
+    public EntityData createDataWatcher(TabPlayer viewer, byte flags, String displayName, boolean nameVisible) {
+        SynchedEntityData data = new SynchedEntityData(null);
+        data.define(new EntityDataAccessor<>(0, EntityDataSerializers.BYTE), flags);
+        data.define(new EntityDataAccessor<>(2, EntityDataSerializers.OPTIONAL_COMPONENT),
+                Optional.of(((FabricTabPlayer)viewer).getPlatform().toComponent(IChatBaseComponent.optimizedComponent(displayName), viewer.getVersion())));
+        data.define(new EntityDataAccessor<>(3, EntityDataSerializers.BOOLEAN), nameVisible);
+        data.define(new EntityDataAccessor<>(14, EntityDataSerializers.BYTE), (byte)16);
+        return () -> data;
+    }
+
+    @Override
+    public Packet<?> spawnEntity(int entityId, UUID id, Object entityType, Location location) {
+        dummyEntity.setId(entityId);
+        dummyEntity.setUUID(id);
+        dummyEntity.setPos(location.getX(), location.getY(), location.getZ());
+        return new ClientboundAddMobPacket(dummyEntity);
+    }
+
+    @Override
+    public Packet<?> newEntityMetadata(int entityId, EntityData data) {
+        return new ClientboundSetEntityDataPacket(entityId, (SynchedEntityData) data.build(), true);
+    }
+
+    @Override
+    public boolean isSpawnPlayerPacket(Object packet) {
+        return packet instanceof ClientboundAddPlayerPacket;
+    }
+
+    @Override
+    @SneakyThrows
+    public int getSpawnedPlayer(Object spawnPacket) {
+        // Getter is client only
+        return ReflectionUtils.getFields(ClientboundAddPlayerPacket.class, int.class).get(0).getInt(spawnPacket);
+    }
+
+    @Override
+    @SneakyThrows
+    public int[] getDestroyedEntities(Object entityDestroyPacket) {
+        // Getter is client only
+        return (int[]) ReflectionUtils.getFields(ClientboundRemoveEntitiesPacket.class, int[].class).get(0).get(entityDestroyPacket);
+    }
+
+    @Override
+    public boolean isBundlePacket(Object packet) {
+        return false;
+    }
+
+    @Override
+    public Iterable<Object> getPackets(Object bundlePacket) {
+        return Collections.emptyList();
+    }
+
+    @Override
+    public PipelineInjector createPipelineInjector() {
+        return new FabricPipelineInjector();
+    }
+
+    @Override
+    public void destroyEntities(FabricTabPlayer player, int... entities) {
+        player.sendPacket(new ClientboundRemoveEntitiesPacket(entities));
+    }
+
+    @Override
+    public void registerCommandCallback() {
+        CommandRegistrationCallback.EVENT.register((dispatcher, $) -> new FabricTabCommand().onRegisterCommands(dispatcher));
+    }
+
+    @Override
+    @SneakyThrows
+    public Packet<?> newHeaderFooter(Component header, Component footer) {
+        ClientboundTabListPacket packet = new ClientboundTabListPacket();
+        List<Field> fields = ReflectionUtils.getFields(ClientboundTabListPacket.class, Component.class);
+        fields.get(0).set(packet, header);
+        fields.get(1).set(packet, footer);
+        return packet;
+    }
+
+    @Override
+    public Packet<?> setDisplaySlot(int slot, Objective objective) {
+        return new ClientboundSetDisplayObjectivePacket(slot, objective);
+    }
+
+    @Override
+    public Objective newObjective(String name, Component displayName, ObjectiveCriteria.RenderType renderType,
+                                  @Nullable Component numberFormat) {
+        return new Objective(dummyScoreboard, name, ObjectiveCriteria.DUMMY, displayName, renderType);
+    }
+
+    @Override
+    public Packet<?> registerTeam(PlayerTeam team) {
+        return new ClientboundSetPlayerTeamPacket(team, Scoreboard.TeamAction.CREATE);
+    }
+
+    @Override
+    public Packet<?> unregisterTeam(PlayerTeam team) {
+        return new ClientboundSetPlayerTeamPacket(team, Scoreboard.TeamAction.REMOVE);
+    }
+
+    @Override
+    public Packet<?> updateTeam(PlayerTeam team) {
+        return new ClientboundSetPlayerTeamPacket(team, Scoreboard.TeamAction.UPDATE);
+    }
+
+    @Override
+    public Packet<?> setScore(String objective, String scoreHolder, int score, Component displayName, @Nullable Component numberFormat) {
+        return new ClientboundSetScorePacket(ServerScoreboard.Method.CHANGE, objective, scoreHolder, score);
+    }
+
+    @Override
+    public Packet<?> removeScore(String objective, String scoreHolder) {
+        return new ClientboundSetScorePacket(ServerScoreboard.Method.REMOVE, objective, scoreHolder, 0);
+    }
+}

fabric/v1_16_5/build.gradle.kts

@@ -0,0 +1,22 @@
+plugins {
+    id("fabric-loom")
+}
+
+repositories {
+    // Gradle doesn't support combining settings and project repositories, so we have to re-declare all the settings repos we need
+    maven("https://jitpack.io") // YamlAssist
+    maven("https://repo.opencollab.dev/maven-snapshots/")
+    maven("https://repo.viaversion.com/")
+    maven("https://oss.sonatype.org/content/repositories/snapshots")
+}
+
+dependencies {
+    implementation(projects.fabric)
+    minecraft("com.mojang:minecraft:1.16.5")
+    mappings(loom.officialMojangMappings())
+    modImplementation("net.fabricmc:fabric-loader:0.14.17")
+    val fabricApiVersion = "0.42.0+1.16"
+    modImplementation(fabricApi.module("fabric-api-base", fabricApiVersion))
+    modImplementation(fabricApi.module("fabric-lifecycle-events-v1", fabricApiVersion))
+    modImplementation(fabricApi.module("fabric-command-api-v1", fabricApiVersion))
+}

fabric/v1_16_5/src/main/java/me/neznamy/tab/platforms/fabric/v1_16_5/FabricPipelineInjector.java

@@ -0,0 +1,149 @@
+package me.neznamy.tab.platforms.fabric.v1_16_5;
+
+import com.mojang.authlib.GameProfile;
+import io.netty.channel.Channel;
+import lombok.SneakyThrows;
+import me.neznamy.tab.platforms.fabric.FabricTabPlayer;
+import me.neznamy.tab.shared.TAB;
+import me.neznamy.tab.shared.TabConstants;
+import me.neznamy.tab.shared.chat.IChatBaseComponent;
+import me.neznamy.tab.shared.features.injection.NettyPipelineInjector;
+import me.neznamy.tab.shared.features.nametags.NameTag;
+import me.neznamy.tab.shared.features.sorting.Sorting;
+import me.neznamy.tab.shared.platform.TabPlayer;
+import me.neznamy.tab.shared.util.ReflectionUtils;
+import net.minecraft.network.Connection;
+import net.minecraft.network.chat.Component;
+import net.minecraft.network.protocol.game.ClientboundPlayerInfoPacket;
+import net.minecraft.network.protocol.game.ClientboundPlayerInfoPacket.Action;
+import net.minecraft.network.protocol.game.ClientboundPlayerInfoPacket.PlayerUpdate;
+import net.minecraft.network.protocol.game.ClientboundSetDisplayObjectivePacket;
+import net.minecraft.network.protocol.game.ClientboundSetObjectivePacket;
+import net.minecraft.network.protocol.game.ClientboundSetPlayerTeamPacket;
+import net.minecraft.server.network.ServerGamePacketListenerImpl;
+import org.jetbrains.annotations.NotNull;
+import org.jetbrains.annotations.Nullable;
+
+import java.lang.reflect.Field;
+import java.util.ArrayList;
+import java.util.Collection;
+import java.util.List;
+
+public class FabricPipelineInjector extends NettyPipelineInjector {
+
+    public FabricPipelineInjector() {
+        super("packet_handler");
+    }
+
+    @Override
+    @Nullable
+    @SneakyThrows
+    protected Channel getChannel(@NotNull TabPlayer player) {
+        Connection c = (Connection) ReflectionUtils.getFields(ServerGamePacketListenerImpl.class, Connection.class)
+                .get(0).get(((FabricTabPlayer)player).getPlayer().connection);
+        return (Channel) ReflectionUtils.getFields(Connection.class, Channel.class).get(0).get(c);
+    }
+
+    @Override
+    @SneakyThrows
+    public void onDisplayObjective(@NotNull TabPlayer player, @NotNull Object packet) {
+        // Getters are client only
+        int slot = ReflectionUtils.getFields(ClientboundSetDisplayObjectivePacket.class, int.class).get(0).getInt(packet);
+        String objective = (String) ReflectionUtils.getFields(ClientboundSetDisplayObjectivePacket.class, String.class).get(0).get(packet);
+        TAB.getInstance().getFeatureManager().onDisplayObjective(player, slot, objective);
+    }
+
+    @Override
+    @SneakyThrows
+    public void onObjective(@NotNull TabPlayer player, @NotNull Object packet) {
+        // Getters are client only
+        int action = ReflectionUtils.getFields(ClientboundSetObjectivePacket.class, int.class).get(0).getInt(packet);
+        String objective = (String) ReflectionUtils.getFields(ClientboundSetObjectivePacket.class, String.class).get(0).get(packet);
+        TAB.getInstance().getFeatureManager().onObjective(player, action, objective);
+    }
+
+    @Override
+    public boolean isDisplayObjective(@NotNull Object packet) {
+        return packet instanceof ClientboundSetDisplayObjectivePacket;
+    }
+
+    @Override
+    public boolean isObjective(@NotNull Object packet) {
+        return packet instanceof ClientboundSetObjectivePacket;
+    }
+
+    @Override
+    public boolean isTeam(@NotNull Object packet) {
+        return packet instanceof ClientboundSetPlayerTeamPacket;
+    }
+
+    @Override
+    public boolean isPlayerInfo(@NotNull Object packet) {
+        return packet instanceof ClientboundPlayerInfoPacket;
+    }
+
+    @Override
+    @SneakyThrows
+    @SuppressWarnings("unchecked")
+    public void onPlayerInfo(@NotNull TabPlayer receiver, @NotNull Object packet) {
+        // Getters are client only
+        Action action = (Action) ReflectionUtils.getFields(ClientboundPlayerInfoPacket.class, Action.class).get(0).get(packet);
+        List<PlayerUpdate> players = (List<PlayerUpdate>) ReflectionUtils.getFields(ClientboundPlayerInfoPacket.class, List.class).get(0).get(packet);
+        for (PlayerUpdate nmsData : players) {
+            GameProfile profile = nmsData.getProfile();
+            Field displayNameField = ReflectionUtils.getFields(PlayerUpdate.class, Component.class).get(0);
+            Field latencyField = ReflectionUtils.getFields(PlayerUpdate.class, int.class).get(0);
+            if (action == Action.UPDATE_DISPLAY_NAME) {
+                IChatBaseComponent newDisplayName = TAB.getInstance().getFeatureManager().onDisplayNameChange(receiver, profile.getId());
+                if (newDisplayName != null) displayNameField.set(nmsData, ((FabricTabPlayer)receiver).getPlatform().toComponent(newDisplayName, receiver.getVersion()));
+            }
+            if (action == Action.UPDATE_LATENCY) {
+                latencyField.set(nmsData, TAB.getInstance().getFeatureManager().onLatencyChange(receiver, profile.getId(), latencyField.getInt(nmsData)));
+            }
+            if (action == Action.ADD_PLAYER) {
+                TAB.getInstance().getFeatureManager().onEntryAdd(receiver, profile.getId(), profile.getName());
+            }
+        }
+    }
+
+    @Override
+    public boolean isLogin(@NotNull Object packet) {
+        return false;
+    }
+
+    @Override
+    @SneakyThrows
+    @SuppressWarnings("unchecked")
+    public void modifyPlayers(@NotNull Object teamPacket) {
+        if (TAB.getInstance().getNameTagManager() == null) return;
+        ClientboundSetPlayerTeamPacket packet = (ClientboundSetPlayerTeamPacket) teamPacket;
+        int action = ReflectionUtils.getInstanceFields(ClientboundSetPlayerTeamPacket.class, int.class).get(0).getInt(packet);
+        if (action == 1 || action == 2 || action == 4) return;
+        Field playersField = ReflectionUtils.getFields(ClientboundSetPlayerTeamPacket.class, Collection.class).get(0);
+        Collection<String> players = (Collection<String>) playersField.get(packet);
+        String teamName = String.valueOf(ReflectionUtils.getFields(ClientboundSetPlayerTeamPacket.class, String.class).get(0).get(packet));
+        if (players == null) return;
+        //creating a new list to prevent NoSuchFieldException in minecraft packet encoder when a player is removed
+        Collection<String> newList = new ArrayList<>();
+        for (String entry : players) {
+            TabPlayer p = getPlayer(entry);
+            if (p == null) {
+                newList.add(entry);
+                continue;
+            }
+            Sorting sorting = TAB.getInstance().getFeatureManager().getFeature(TabConstants.Feature.SORTING);
+            String expectedTeam = sorting.getShortTeamName(p);
+            if (expectedTeam == null) {
+                newList.add(entry);
+                continue;
+            }
+            if (!((NameTag)TAB.getInstance().getNameTagManager()).getDisableChecker().isDisabledPlayer(p) &&
+                    !TAB.getInstance().getNameTagManager().hasTeamHandlingPaused(p) && !teamName.equals(expectedTeam)) {
+                logTeamOverride(teamName, p.getName(), expectedTeam);
+            } else {
+                newList.add(entry);
+            }
+        }
+        playersField.set(packet, newList);
+    }
+}

fabric/v1_16_5/src/main/java/me/neznamy/tab/platforms/fabric/v1_16_5/FabricTAB.java

@@ -0,0 +1,234 @@
+package me.neznamy.tab.platforms.fabric.v1_16_5;
+
+import com.mojang.authlib.properties.Property;
+import lombok.SneakyThrows;
+import me.neznamy.tab.platforms.fabric.*;
+import me.neznamy.tab.shared.TAB;
+import me.neznamy.tab.shared.backend.EntityData;
+import me.neznamy.tab.shared.backend.Location;
+import me.neznamy.tab.shared.chat.IChatBaseComponent;
+import me.neznamy.tab.shared.features.injection.PipelineInjector;
+import me.neznamy.tab.shared.platform.Scoreboard;
+import me.neznamy.tab.shared.platform.TabList;
+import me.neznamy.tab.shared.platform.TabPlayer;
+import me.neznamy.tab.shared.util.ReflectionUtils;
+import net.fabricmc.fabric.api.command.v1.CommandRegistrationCallback;
+import net.minecraft.SharedConstants;
+import net.minecraft.commands.CommandSourceStack;
+import net.minecraft.network.chat.Component;
+import net.minecraft.network.protocol.Packet;
+import net.minecraft.network.protocol.game.*;
+import net.minecraft.network.syncher.EntityDataAccessor;
+import net.minecraft.network.syncher.EntityDataSerializers;
+import net.minecraft.network.syncher.SynchedEntityData;
+import net.minecraft.server.ServerScoreboard;
+import net.minecraft.server.level.ServerPlayer;
+import net.minecraft.world.level.GameType;
+import net.minecraft.world.level.Level;
+import net.minecraft.world.level.storage.ServerLevelData;
+import net.minecraft.world.scores.Objective;
+import net.minecraft.world.scores.PlayerTeam;
+import net.minecraft.world.scores.criteria.ObjectiveCriteria;
+import org.jetbrains.annotations.Nullable;
+
+import java.lang.reflect.Field;
+import java.util.*;
+
+public class FabricTAB implements VersionLoader {
+
+    @Override
+    public List<String> getSupportedVersions() {
+        return Collections.singletonList("1.16.5");
+    }
+
+    @Override
+    public String getName(Level level) {
+        String path = level.dimension().location().getPath();
+        String dimensionSuffix;
+        switch (path) {
+            case "overworld":
+                dimensionSuffix = ""; // No suffix for overworld
+                break;
+            case "the_nether":
+                dimensionSuffix = "_nether";
+                break;
+            default:
+                dimensionSuffix = "_" + path; // End + default behavior for other dimensions created by mods
+                break;
+        }
+        return ((ServerLevelData)level.getLevelData()).getLevelName() + dimensionSuffix;
+    }
+
+    @Override
+    public int getPing(ServerPlayer player) {
+        return player.latency;
+    }
+
+    @Override
+    public void sendMessage(ServerPlayer player, Component message) {
+        player.sendMessage(message, new UUID(0, 0));
+    }
+
+    @Override
+    public TabList.Skin propertyToSkin(Property property) {
+        return new TabList.Skin(property.getValue(), property.getSignature());
+    }
+
+    @Override
+    public void sendMessage(CommandSourceStack sender, Component message) {
+        sender.sendSuccess(message, false);
+    }
+
+    @Override
+    public String getServerVersion() {
+        return SharedConstants.getCurrentVersion().getName();
+    }
+
+    @Override
+    public double getMSPT() {
+        return ((FabricPlatform)TAB.getInstance().getPlatform()).getServer().getAverageTickTime();
+    }
+
+    @Override
+    public Component deserialize(String string) {
+        return Component.Serializer.fromJson(string);
+    }
+
+    @Override
+    @SneakyThrows
+    public Packet<?> build(TabList.Action action, FabricTabList.Builder entry) {
+        ClientboundPlayerInfoPacket packet = new ClientboundPlayerInfoPacket(ClientboundPlayerInfoPacket.Action.valueOf(action.name()), Collections.emptyList());
+        ReflectionUtils.getFields(ClientboundPlayerInfoPacket.class, List.class).get(0).set(packet,
+                Collections.singletonList(new ClientboundPlayerInfoPacket().new PlayerUpdate(
+                        entry.createProfile(),
+                        entry.getLatency(),
+                        GameType.byId(entry.getGameMode()),
+                        entry.getDisplayName()
+                )));
+        return packet;
+    }
+
+    @Override
+    public Level getLevel(ServerPlayer player) {
+        return player.level;
+    }
+
+    @Override
+    public boolean isSneaking(ServerPlayer player) {
+        return player.isCrouching();
+    }
+
+    @Override
+    public EntityData createDataWatcher(TabPlayer viewer, byte flags, String displayName, boolean nameVisible) {
+        SynchedEntityData data = new SynchedEntityData(null);
+        data.define(new EntityDataAccessor<>(0, EntityDataSerializers.BYTE), flags);
+        data.define(new EntityDataAccessor<>(2, EntityDataSerializers.OPTIONAL_COMPONENT),
+                Optional.of(((FabricTabPlayer)viewer).getPlatform().toComponent(IChatBaseComponent.optimizedComponent(displayName), viewer.getVersion())));
+        data.define(new EntityDataAccessor<>(3, EntityDataSerializers.BOOLEAN), nameVisible);
+        data.define(new EntityDataAccessor<>(14, EntityDataSerializers.BYTE), (byte)16);
+        return () -> data;
+    }
+
+    @Override
+    public Packet<?> spawnEntity(int entityId, UUID id, Object entityType, Location location) {
+        dummyEntity.setId(entityId);
+        dummyEntity.setUUID(id);
+        dummyEntity.setPos(location.getX(), location.getY(), location.getZ());
+        return new ClientboundAddMobPacket(dummyEntity);
+    }
+
+    @Override
+    public Packet<?> newEntityMetadata(int entityId, EntityData data) {
+        return new ClientboundSetEntityDataPacket(entityId, (SynchedEntityData) data.build(), true);
+    }
+
+    @Override
+    public boolean isSpawnPlayerPacket(Object packet) {
+        return packet instanceof ClientboundAddPlayerPacket;
+    }
+
+    @Override
+    @SneakyThrows
+    public int getSpawnedPlayer(Object spawnPacket) {
+        // Getter is client only
+        return ReflectionUtils.getFields(ClientboundAddPlayerPacket.class, int.class).get(0).getInt(spawnPacket);
+    }
+
+    @Override
+    @SneakyThrows
+    public int[] getDestroyedEntities(Object entityDestroyPacket) {
+        // Getter is client only
+        return (int[]) ReflectionUtils.getFields(ClientboundRemoveEntitiesPacket.class, int[].class).get(0).get(entityDestroyPacket);
+    }
+
+    @Override
+    public boolean isBundlePacket(Object packet) {
+        return false;
+    }
+
+    @Override
+    public Iterable<Object> getPackets(Object bundlePacket) {
+        return Collections.emptyList();
+    }
+
+    @Override
+    public PipelineInjector createPipelineInjector() {
+        return new FabricPipelineInjector();
+    }
+
+    @Override
+    public void destroyEntities(FabricTabPlayer player, int... entities) {
+        player.sendPacket(new ClientboundRemoveEntitiesPacket(entities));
+    }
+
+    @Override
+    public void registerCommandCallback() {
+        CommandRegistrationCallback.EVENT.register((dispatcher, $) -> new FabricTabCommand().onRegisterCommands(dispatcher));
+    }
+
+    @Override
+    @SneakyThrows
+    public Packet<?> newHeaderFooter(Component header, Component footer) {
+        ClientboundTabListPacket packet = new ClientboundTabListPacket();
+        List<Field> fields = ReflectionUtils.getFields(ClientboundTabListPacket.class, Component.class);
+        fields.get(0).set(packet, header);
+        fields.get(1).set(packet, footer);
+        return packet;
+    }
+
+    @Override
+    public Packet<?> setDisplaySlot(int slot, Objective objective) {
+        return new ClientboundSetDisplayObjectivePacket(slot, objective);
+    }
+
+    @Override
+    public Objective newObjective(String name, Component displayName, ObjectiveCriteria.RenderType renderType,
+                                  @Nullable Component numberFormat) {
+        return new Objective(dummyScoreboard, name, ObjectiveCriteria.DUMMY, displayName, renderType);
+    }
+
+    @Override
+    public Packet<?> registerTeam(PlayerTeam team) {
+        return new ClientboundSetPlayerTeamPacket(team, Scoreboard.TeamAction.CREATE);
+    }
+
+    @Override
+    public Packet<?> unregisterTeam(PlayerTeam team) {
+        return new ClientboundSetPlayerTeamPacket(team, Scoreboard.TeamAction.REMOVE);
+    }
+
+    @Override
+    public Packet<?> updateTeam(PlayerTeam team) {
+        return new ClientboundSetPlayerTeamPacket(team, Scoreboard.TeamAction.UPDATE);
+    }
+
+    @Override
+    public Packet<?> setScore(String objective, String scoreHolder, int score, Component displayName, @Nullable Component numberFormat) {
+        return new ClientboundSetScorePacket(ServerScoreboard.Method.CHANGE, objective, scoreHolder, score);
+    }
+
+    @Override
+    public Packet<?> removeScore(String objective, String scoreHolder) {
+        return new ClientboundSetScorePacket(ServerScoreboard.Method.REMOVE, objective, scoreHolder, 0);
+    }
+}

fabric/v1_17/build.gradle.kts

@@ -0,0 +1,28 @@
+plugins {
+    id("fabric-loom")
+}
+
+repositories {
+    // Gradle doesn't support combining settings and project repositories, so we have to re-declare all the settings repos we need
+    maven("https://jitpack.io") // YamlAssist
+    maven("https://repo.opencollab.dev/maven-snapshots/")
+    maven("https://repo.viaversion.com/")
+    maven("https://oss.sonatype.org/content/repositories/snapshots")
+}
+
+dependencies {
+    implementation(projects.fabric)
+    minecraft("com.mojang:minecraft:1.17")
+    mappings(loom.officialMojangMappings())
+    modImplementation("net.fabricmc:fabric-loader:0.14.17")
+    val fabricApiVersion = "0.46.1+1.17"
+    modImplementation(fabricApi.module("fabric-api-base", fabricApiVersion))
+    modImplementation(fabricApi.module("fabric-lifecycle-events-v1", fabricApiVersion))
+    modImplementation(fabricApi.module("fabric-command-api-v1", fabricApiVersion))
+}
+
+tasks {
+    compileJava {
+        options.release.set(17)
+    }
+}

fabric/v1_17/src/main/java/me/neznamy/tab/platforms/fabric/v1_17/FabricPipelineInjector.java

@@ -0,0 +1,137 @@
+package me.neznamy.tab.platforms.fabric.v1_17;
+
+import com.mojang.authlib.GameProfile;
+import io.netty.channel.Channel;
+import lombok.SneakyThrows;
+import me.neznamy.tab.platforms.fabric.FabricTabPlayer;
+import me.neznamy.tab.shared.TAB;
+import me.neznamy.tab.shared.TabConstants;
+import me.neznamy.tab.shared.chat.IChatBaseComponent;
+import me.neznamy.tab.shared.features.injection.NettyPipelineInjector;
+import me.neznamy.tab.shared.features.nametags.NameTag;
+import me.neznamy.tab.shared.features.sorting.Sorting;
+import me.neznamy.tab.shared.platform.TabPlayer;
+import me.neznamy.tab.shared.util.ReflectionUtils;
+import net.minecraft.network.Connection;
+import net.minecraft.network.chat.Component;
+import net.minecraft.network.protocol.game.ClientboundPlayerInfoPacket;
+import net.minecraft.network.protocol.game.ClientboundSetDisplayObjectivePacket;
+import net.minecraft.network.protocol.game.ClientboundSetObjectivePacket;
+import net.minecraft.network.protocol.game.ClientboundSetPlayerTeamPacket;
+import net.minecraft.server.network.ServerGamePacketListenerImpl;
+import org.jetbrains.annotations.NotNull;
+import org.jetbrains.annotations.Nullable;
+
+import java.lang.reflect.Field;
+import java.util.ArrayList;
+import java.util.Collection;
+
+public class FabricPipelineInjector extends NettyPipelineInjector {
+
+    public FabricPipelineInjector() {
+        super("packet_handler");
+    }
+
+    @Override
+    @Nullable
+    @SneakyThrows
+    protected Channel getChannel(@NotNull TabPlayer player) {
+        Connection c = (Connection) ReflectionUtils.getFields(ServerGamePacketListenerImpl.class, Connection.class)
+                .get(0).get(((FabricTabPlayer)player).getPlayer().connection);
+        return (Channel) ReflectionUtils.getFields(Connection.class, Channel.class).get(0).get(c);
+    }
+
+    @Override
+    public void onDisplayObjective(@NotNull TabPlayer player, @NotNull Object packet) {
+        TAB.getInstance().getFeatureManager().onDisplayObjective(player,
+                ((ClientboundSetDisplayObjectivePacket) packet).getSlot(),
+                String.valueOf(((ClientboundSetDisplayObjectivePacket)packet).getObjectiveName()));
+    }
+
+    @Override
+    public void onObjective(@NotNull TabPlayer player, @NotNull Object packet) {
+        TAB.getInstance().getFeatureManager().onObjective(player,
+                ((ClientboundSetObjectivePacket)packet).getMethod(),
+                ((ClientboundSetObjectivePacket)packet).getObjectiveName());
+    }
+
+    @Override
+    public boolean isDisplayObjective(@NotNull Object packet) {
+        return packet instanceof ClientboundSetDisplayObjectivePacket;
+    }
+
+    @Override
+    public boolean isObjective(@NotNull Object packet) {
+        return packet instanceof ClientboundSetObjectivePacket;
+    }
+
+    @Override
+    public boolean isTeam(@NotNull Object packet) {
+        return packet instanceof ClientboundSetPlayerTeamPacket;
+    }
+
+    @Override
+    public boolean isPlayerInfo(@NotNull Object packet) {
+        return packet instanceof ClientboundPlayerInfoPacket;
+    }
+
+    @Override
+    @SneakyThrows
+    public void onPlayerInfo(@NotNull TabPlayer receiver, @NotNull Object packet0) {
+        ClientboundPlayerInfoPacket packet = (ClientboundPlayerInfoPacket) packet0;
+        for (ClientboundPlayerInfoPacket.PlayerUpdate nmsData : packet.getEntries()) {
+            GameProfile profile = nmsData.getProfile();
+            Field displayNameField = ReflectionUtils.getFields(ClientboundPlayerInfoPacket.PlayerUpdate.class, Component.class).get(0);
+            Field latencyField = ReflectionUtils.getFields(ClientboundPlayerInfoPacket.PlayerUpdate.class, int.class).get(0);
+            if (packet.getAction() == ClientboundPlayerInfoPacket.Action.UPDATE_DISPLAY_NAME) {
+                IChatBaseComponent newDisplayName = TAB.getInstance().getFeatureManager().onDisplayNameChange(receiver, profile.getId());
+                if (newDisplayName != null) displayNameField.set(nmsData, ((FabricTabPlayer)receiver).getPlatform().toComponent(newDisplayName, receiver.getVersion()));
+            }
+            if (packet.getAction() == ClientboundPlayerInfoPacket.Action.UPDATE_LATENCY) {
+                latencyField.set(nmsData, TAB.getInstance().getFeatureManager().onLatencyChange(receiver, profile.getId(), latencyField.getInt(nmsData)));
+            }
+            if (packet.getAction() == ClientboundPlayerInfoPacket.Action.ADD_PLAYER) {
+                TAB.getInstance().getFeatureManager().onEntryAdd(receiver, profile.getId(), profile.getName());
+            }
+        }
+    }
+
+    @Override
+    public boolean isLogin(@NotNull Object packet) {
+        return false;
+    }
+
+    @Override
+    @SneakyThrows
+    public void modifyPlayers(@NotNull Object teamPacket) {
+        if (TAB.getInstance().getNameTagManager() == null) return;
+        ClientboundSetPlayerTeamPacket packet = (ClientboundSetPlayerTeamPacket) teamPacket;
+        int action = ReflectionUtils.getInstanceFields(ClientboundSetPlayerTeamPacket.class, int.class).get(0).getInt(packet);
+        if (action == 1 || action == 2 || action == 4) return;
+        Collection<String> players = packet.getPlayers();
+        String teamName = packet.getName();
+        if (players == null) return;
+        //creating a new list to prevent NoSuchFieldException in minecraft packet encoder when a player is removed
+        Collection<String> newList = new ArrayList<>();
+        for (String entry : players) {
+            TabPlayer p = getPlayer(entry);
+            if (p == null) {
+                newList.add(entry);
+                continue;
+            }
+            Sorting sorting = TAB.getInstance().getFeatureManager().getFeature(TabConstants.Feature.SORTING);
+            String expectedTeam = sorting.getShortTeamName(p);
+            if (expectedTeam == null) {
+                newList.add(entry);
+                continue;
+            }
+            if (!((NameTag)TAB.getInstance().getNameTagManager()).getDisableChecker().isDisabledPlayer(p) &&
+                    !TAB.getInstance().getNameTagManager().hasTeamHandlingPaused(p) && !teamName.equals(expectedTeam)) {
+                logTeamOverride(teamName, p.getName(), expectedTeam);
+            } else {
+                newList.add(entry);
+            }
+        }
+        ReflectionUtils.getFields(ClientboundSetPlayerTeamPacket.class, Collection.class).get(0).set(packet, newList);
+    }
+}

fabric/v1_17/src/main/java/me/neznamy/tab/platforms/fabric/v1_17/FabricTAB.java

@@ -0,0 +1,221 @@
+package me.neznamy.tab.platforms.fabric.v1_17;
+
+import com.mojang.authlib.properties.Property;
+import lombok.SneakyThrows;
+import me.neznamy.tab.platforms.fabric.*;
+import me.neznamy.tab.shared.TAB;
+import me.neznamy.tab.shared.backend.EntityData;
+import me.neznamy.tab.shared.backend.Location;
+import me.neznamy.tab.shared.chat.IChatBaseComponent;
+import me.neznamy.tab.shared.features.injection.PipelineInjector;
+import me.neznamy.tab.shared.platform.TabList;
+import me.neznamy.tab.shared.platform.TabPlayer;
+import me.neznamy.tab.shared.util.ReflectionUtils;
+import net.fabricmc.fabric.api.command.v1.CommandRegistrationCallback;
+import net.minecraft.SharedConstants;
+import net.minecraft.commands.CommandSourceStack;
+import net.minecraft.network.chat.Component;
+import net.minecraft.network.protocol.Packet;
+import net.minecraft.network.protocol.game.*;
+import net.minecraft.network.syncher.EntityDataAccessor;
+import net.minecraft.network.syncher.EntityDataSerializers;
+import net.minecraft.network.syncher.SynchedEntityData;
+import net.minecraft.server.ServerScoreboard;
+import net.minecraft.server.level.ServerPlayer;
+import net.minecraft.world.entity.EntityType;
+import net.minecraft.world.level.GameType;
+import net.minecraft.world.level.Level;
+import net.minecraft.world.level.storage.ServerLevelData;
+import net.minecraft.world.phys.Vec3;
+import net.minecraft.world.scores.Objective;
+import net.minecraft.world.scores.PlayerTeam;
+import net.minecraft.world.scores.criteria.ObjectiveCriteria;
+import org.jetbrains.annotations.Nullable;
+
+import java.util.Collections;
+import java.util.List;
+import java.util.Optional;
+import java.util.UUID;
+
+public class FabricTAB implements VersionLoader {
+
+    @Override
+    public List<String> getSupportedVersions() {
+        return List.of("1.17");
+    }
+
+    @Override
+    public String getName(Level level) {
+        String path = level.dimension().location().getPath();
+        String dimensionSuffix = switch (path) {
+            case "overworld" -> ""; // No suffix for overworld
+            case "the_nether" -> "_nether";
+            default -> "_" + path; // End + default behavior for other dimensions created by mods
+        };
+        return ((ServerLevelData)level.getLevelData()).getLevelName() + dimensionSuffix;
+    }
+
+    @Override
+    public int getPing(ServerPlayer player) {
+        return player.latency;
+    }
+
+    @Override
+    public void sendMessage(ServerPlayer player, Component message) {
+        player.sendMessage(message, new UUID(0, 0));
+    }
+
+    @Override
+    public TabList.Skin propertyToSkin(Property property) {
+        return new TabList.Skin(property.getValue(), property.getSignature());
+    }
+
+    @Override
+    public void sendMessage(CommandSourceStack sender, Component message) {
+        sender.sendSuccess(message, false);
+    }
+
+    @Override
+    public String getServerVersion() {
+        return SharedConstants.getCurrentVersion().getName();
+    }
+
+    @Override
+    public double getMSPT() {
+        return ((FabricPlatform)TAB.getInstance().getPlatform()).getServer().getAverageTickTime();
+    }
+
+    @Override
+    public Component deserialize(String string) {
+        return Component.Serializer.fromJson(string);
+    }
+
+    @Override
+    @SneakyThrows
+    public Packet<?> build(TabList.Action action, FabricTabList.Builder entry) {
+        ClientboundPlayerInfoPacket packet = new ClientboundPlayerInfoPacket(ClientboundPlayerInfoPacket.Action.valueOf(action.name()), Collections.emptyList());
+        ReflectionUtils.getFields(ClientboundPlayerInfoPacket.class, List.class).get(0).set(packet,
+                Collections.singletonList(new ClientboundPlayerInfoPacket.PlayerUpdate(
+                        entry.createProfile(),
+                        entry.getLatency(),
+                        GameType.byId(entry.getGameMode()),
+                        entry.getDisplayName()
+                )));
+        return packet;
+    }
+
+    @Override
+    public Level getLevel(ServerPlayer player) {
+        return player.level;
+    }
+
+    @Override
+    public boolean isSneaking(ServerPlayer player) {
+        return player.isCrouching();
+    }
+
+    @Override
+    public EntityData createDataWatcher(TabPlayer viewer, byte flags, String displayName, boolean nameVisible) {
+        SynchedEntityData data = new SynchedEntityData(null);
+        data.define(new EntityDataAccessor<>(0, EntityDataSerializers.BYTE), flags);
+        data.define(new EntityDataAccessor<>(2, EntityDataSerializers.OPTIONAL_COMPONENT),
+                Optional.of(((FabricTabPlayer)viewer).getPlatform().toComponent(IChatBaseComponent.optimizedComponent(displayName), viewer.getVersion())));
+        data.define(new EntityDataAccessor<>(3, EntityDataSerializers.BOOLEAN), nameVisible);
+        data.define(new EntityDataAccessor<>(15, EntityDataSerializers.BYTE), (byte)16);
+        return () -> data;
+    }
+
+    @Override
+    public Packet<?> spawnEntity(int entityId, UUID id, Object entityType, Location location) {
+        return new ClientboundAddEntityPacket(entityId, id, location.getX(), location.getY(), location.getZ(),
+                0, 0, (EntityType<?>) entityType, 0, Vec3.ZERO);
+    }
+
+    @Override
+    public Packet<?> newEntityMetadata(int entityId, EntityData data) {
+        return new ClientboundSetEntityDataPacket(entityId, (SynchedEntityData) data.build(), true);
+    }
+
+    @Override
+    public boolean isSpawnPlayerPacket(Object packet) {
+        return packet instanceof ClientboundAddPlayerPacket;
+    }
+
+    @Override
+    public int getSpawnedPlayer(Object spawnPacket) {
+        return ((ClientboundAddPlayerPacket) spawnPacket).getEntityId();
+    }
+
+    @Override
+    public int[] getDestroyedEntities(Object entityDestroyPacket) {
+        return new int[]{((ClientboundRemoveEntityPacket) entityDestroyPacket).getEntityId()};
+    }
+
+    @Override
+    public boolean isBundlePacket(Object packet) {
+        return false;
+    }
+
+    @Override
+    public Iterable<Object> getPackets(Object bundlePacket) {
+        return Collections.emptyList();
+    }
+
+    @Override
+    public PipelineInjector createPipelineInjector() {
+        return new FabricPipelineInjector();
+    }
+
+    @Override
+    public void destroyEntities(FabricTabPlayer player, int... entities) {
+        for (int entity : entities) {
+            player.sendPacket(new ClientboundRemoveEntityPacket(entity));
+        }
+    }
+
+    @Override
+    public void registerCommandCallback() {
+        CommandRegistrationCallback.EVENT.register((dispatcher, $) -> new FabricTabCommand().onRegisterCommands(dispatcher));
+    }
+
+    @Override
+    public Packet<?> newHeaderFooter(Component header, Component footer) {
+        return new ClientboundTabListPacket(header, footer);
+    }
+
+    @Override
+    public Packet<?> setDisplaySlot(int slot, Objective objective) {
+        return new ClientboundSetDisplayObjectivePacket(slot, objective);
+    }
+
+    @Override
+    public Objective newObjective(String name, Component displayName, ObjectiveCriteria.RenderType renderType,
+                                  @Nullable Component numberFormat) {
+        return new Objective(dummyScoreboard, name, ObjectiveCriteria.DUMMY, displayName, renderType);
+    }
+
+    @Override
+    public Packet<?> registerTeam(PlayerTeam team) {
+        return ClientboundSetPlayerTeamPacket.createAddOrModifyPacket(team, true);
+    }
+
+    @Override
+    public Packet<?> unregisterTeam(PlayerTeam team) {
+        return ClientboundSetPlayerTeamPacket.createRemovePacket(team);
+    }
+
+    @Override
+    public Packet<?> updateTeam(PlayerTeam team) {
+        return ClientboundSetPlayerTeamPacket.createAddOrModifyPacket(team, false);
+    }
+
+    @Override
+    public Packet<?> setScore(String objective, String scoreHolder, int score, Component displayName, @Nullable Component numberFormat) {
+        return new ClientboundSetScorePacket(ServerScoreboard.Method.CHANGE, objective, scoreHolder, score);
+    }
+
+    @Override
+    public Packet<?> removeScore(String objective, String scoreHolder) {
+        return new ClientboundSetScorePacket(ServerScoreboard.Method.REMOVE, objective, scoreHolder, 0);
+    }
+}

fabric/v1_17_1/build.gradle.kts

@@ -0,0 +1,28 @@
+plugins {
+    id("fabric-loom")
+}
+
+repositories {
+    // Gradle doesn't support combining settings and project repositories, so we have to re-declare all the settings repos we need
+    maven("https://jitpack.io") // YamlAssist
+    maven("https://repo.opencollab.dev/maven-snapshots/")
+    maven("https://repo.viaversion.com/")
+    maven("https://oss.sonatype.org/content/repositories/snapshots")
+}
+
+dependencies {
+    implementation(projects.fabric)
+    minecraft("com.mojang:minecraft:1.17.1")
+    mappings(loom.officialMojangMappings())
+    modImplementation("net.fabricmc:fabric-loader:0.14.17")
+    val fabricApiVersion = "0.46.1+1.17"
+    modImplementation(fabricApi.module("fabric-api-base", fabricApiVersion))
+    modImplementation(fabricApi.module("fabric-lifecycle-events-v1", fabricApiVersion))
+    modImplementation(fabricApi.module("fabric-command-api-v1", fabricApiVersion))
+}
+
+tasks {
+    compileJava {
+        options.release.set(17)
+    }
+}

fabric/v1_17_1/src/main/java/me/neznamy/tab/platforms/fabric/v1_17_1/FabricPipelineInjector.java

@@ -0,0 +1,137 @@
+package me.neznamy.tab.platforms.fabric.v1_17_1;
+
+import com.mojang.authlib.GameProfile;
+import io.netty.channel.Channel;
+import lombok.SneakyThrows;
+import me.neznamy.tab.platforms.fabric.FabricTabPlayer;
+import me.neznamy.tab.shared.TAB;
+import me.neznamy.tab.shared.TabConstants;
+import me.neznamy.tab.shared.chat.IChatBaseComponent;
+import me.neznamy.tab.shared.features.injection.NettyPipelineInjector;
+import me.neznamy.tab.shared.features.nametags.NameTag;
+import me.neznamy.tab.shared.features.sorting.Sorting;
+import me.neznamy.tab.shared.platform.TabPlayer;
+import me.neznamy.tab.shared.util.ReflectionUtils;
+import net.minecraft.network.Connection;
+import net.minecraft.network.chat.Component;
+import net.minecraft.network.protocol.game.ClientboundPlayerInfoPacket;
+import net.minecraft.network.protocol.game.ClientboundSetDisplayObjectivePacket;
+import net.minecraft.network.protocol.game.ClientboundSetObjectivePacket;
+import net.minecraft.network.protocol.game.ClientboundSetPlayerTeamPacket;
+import net.minecraft.server.network.ServerGamePacketListenerImpl;
+import org.jetbrains.annotations.NotNull;
+import org.jetbrains.annotations.Nullable;
+
+import java.lang.reflect.Field;
+import java.util.ArrayList;
+import java.util.Collection;
+
+public class FabricPipelineInjector extends NettyPipelineInjector {
+
+    public FabricPipelineInjector() {
+        super("packet_handler");
+    }
+
+    @Override
+    @Nullable
+    @SneakyThrows
+    protected Channel getChannel(@NotNull TabPlayer player) {
+        Connection c = (Connection) ReflectionUtils.getFields(ServerGamePacketListenerImpl.class, Connection.class)
+                .get(0).get(((FabricTabPlayer)player).getPlayer().connection);
+        return (Channel) ReflectionUtils.getFields(Connection.class, Channel.class).get(0).get(c);
+    }
+
+    @Override
+    public void onDisplayObjective(@NotNull TabPlayer player, @NotNull Object packet) {
+        TAB.getInstance().getFeatureManager().onDisplayObjective(player,
+                ((ClientboundSetDisplayObjectivePacket) packet).getSlot(),
+                String.valueOf(((ClientboundSetDisplayObjectivePacket)packet).getObjectiveName()));
+    }
+
+    @Override
+    public void onObjective(@NotNull TabPlayer player, @NotNull Object packet) {
+        TAB.getInstance().getFeatureManager().onObjective(player,
+                ((ClientboundSetObjectivePacket)packet).getMethod(),
+                ((ClientboundSetObjectivePacket)packet).getObjectiveName());
+    }
+
+    @Override
+    public boolean isDisplayObjective(@NotNull Object packet) {
+        return packet instanceof ClientboundSetDisplayObjectivePacket;
+    }
+
+    @Override
+    public boolean isObjective(@NotNull Object packet) {
+        return packet instanceof ClientboundSetObjectivePacket;
+    }
+
+    @Override
+    public boolean isTeam(@NotNull Object packet) {
+        return packet instanceof ClientboundSetPlayerTeamPacket;
+    }
+
+    @Override
+    public boolean isPlayerInfo(@NotNull Object packet) {
+        return packet instanceof ClientboundPlayerInfoPacket;
+    }
+
+    @Override
+    @SneakyThrows
+    public void onPlayerInfo(@NotNull TabPlayer receiver, @NotNull Object packet0) {
+        ClientboundPlayerInfoPacket packet = (ClientboundPlayerInfoPacket) packet0;
+        for (ClientboundPlayerInfoPacket.PlayerUpdate nmsData : packet.getEntries()) {
+            GameProfile profile = nmsData.getProfile();
+            Field displayNameField = ReflectionUtils.getFields(ClientboundPlayerInfoPacket.PlayerUpdate.class, Component.class).get(0);
+            Field latencyField = ReflectionUtils.getFields(ClientboundPlayerInfoPacket.PlayerUpdate.class, int.class).get(0);
+            if (packet.getAction() == ClientboundPlayerInfoPacket.Action.UPDATE_DISPLAY_NAME) {
+                IChatBaseComponent newDisplayName = TAB.getInstance().getFeatureManager().onDisplayNameChange(receiver, profile.getId());
+                if (newDisplayName != null) displayNameField.set(nmsData, ((FabricTabPlayer)receiver).getPlatform().toComponent(newDisplayName, receiver.getVersion()));
+            }
+            if (packet.getAction() == ClientboundPlayerInfoPacket.Action.UPDATE_LATENCY) {
+                latencyField.set(nmsData, TAB.getInstance().getFeatureManager().onLatencyChange(receiver, profile.getId(), latencyField.getInt(nmsData)));
+            }
+            if (packet.getAction() == ClientboundPlayerInfoPacket.Action.ADD_PLAYER) {
+                TAB.getInstance().getFeatureManager().onEntryAdd(receiver, profile.getId(), profile.getName());
+            }
+        }
+    }
+
+    @Override
+    public boolean isLogin(@NotNull Object packet) {
+        return false;
+    }
+
+    @Override
+    @SneakyThrows
+    public void modifyPlayers(@NotNull Object teamPacket) {
+        if (TAB.getInstance().getNameTagManager() == null) return;
+        ClientboundSetPlayerTeamPacket packet = (ClientboundSetPlayerTeamPacket) teamPacket;
+        int action = ReflectionUtils.getInstanceFields(ClientboundSetPlayerTeamPacket.class, int.class).get(0).getInt(packet);
+        if (action == 1 || action == 2 || action == 4) return;
+        Collection<String> players = packet.getPlayers();
+        String teamName = packet.getName();
+        if (players == null) return;
+        //creating a new list to prevent NoSuchFieldException in minecraft packet encoder when a player is removed
+        Collection<String> newList = new ArrayList<>();
+        for (String entry : players) {
+            TabPlayer p = getPlayer(entry);
+            if (p == null) {
+                newList.add(entry);
+                continue;
+            }
+            Sorting sorting = TAB.getInstance().getFeatureManager().getFeature(TabConstants.Feature.SORTING);
+            String expectedTeam = sorting.getShortTeamName(p);
+            if (expectedTeam == null) {
+                newList.add(entry);
+                continue;
+            }
+            if (!((NameTag)TAB.getInstance().getNameTagManager()).getDisableChecker().isDisabledPlayer(p) &&
+                    !TAB.getInstance().getNameTagManager().hasTeamHandlingPaused(p) && !teamName.equals(expectedTeam)) {
+                logTeamOverride(teamName, p.getName(), expectedTeam);
+            } else {
+                newList.add(entry);
+            }
+        }
+        ReflectionUtils.getFields(ClientboundSetPlayerTeamPacket.class, Collection.class).get(0).set(packet, newList);
+    }
+}

fabric/v1_17_1/src/main/java/me/neznamy/tab/platforms/fabric/v1_17_1/FabricTAB.java

@@ -0,0 +1,219 @@
+package me.neznamy.tab.platforms.fabric.v1_17_1;
+
+import com.mojang.authlib.properties.Property;
+import lombok.SneakyThrows;
+import me.neznamy.tab.platforms.fabric.*;
+import me.neznamy.tab.shared.TAB;
+import me.neznamy.tab.shared.backend.EntityData;
+import me.neznamy.tab.shared.backend.Location;
+import me.neznamy.tab.shared.chat.IChatBaseComponent;
+import me.neznamy.tab.shared.features.injection.PipelineInjector;
+import me.neznamy.tab.shared.platform.TabList;
+import me.neznamy.tab.shared.platform.TabPlayer;
+import me.neznamy.tab.shared.util.ReflectionUtils;
+import net.fabricmc.fabric.api.command.v1.CommandRegistrationCallback;
+import net.minecraft.SharedConstants;
+import net.minecraft.commands.CommandSourceStack;
+import net.minecraft.network.chat.Component;
+import net.minecraft.network.protocol.Packet;
+import net.minecraft.network.protocol.game.*;
+import net.minecraft.network.syncher.EntityDataAccessor;
+import net.minecraft.network.syncher.EntityDataSerializers;
+import net.minecraft.network.syncher.SynchedEntityData;
+import net.minecraft.server.ServerScoreboard;
+import net.minecraft.server.level.ServerPlayer;
+import net.minecraft.world.entity.EntityType;
+import net.minecraft.world.level.GameType;
+import net.minecraft.world.level.Level;
+import net.minecraft.world.level.storage.ServerLevelData;
+import net.minecraft.world.phys.Vec3;
+import net.minecraft.world.scores.Objective;
+import net.minecraft.world.scores.PlayerTeam;
+import net.minecraft.world.scores.criteria.ObjectiveCriteria;
+import org.jetbrains.annotations.Nullable;
+
+import java.util.Collections;
+import java.util.List;
+import java.util.Optional;
+import java.util.UUID;
+
+public class FabricTAB implements VersionLoader {
+
+    @Override
+    public List<String> getSupportedVersions() {
+        return List.of("1.17.1");
+    }
+
+    @Override
+    public String getName(Level level) {
+        String path = level.dimension().location().getPath();
+        String dimensionSuffix = switch (path) {
+            case "overworld" -> ""; // No suffix for overworld
+            case "the_nether" -> "_nether";
+            default -> "_" + path; // End + default behavior for other dimensions created by mods
+        };
+        return ((ServerLevelData)level.getLevelData()).getLevelName() + dimensionSuffix;
+    }
+
+    @Override
+    public int getPing(ServerPlayer player) {
+        return player.latency;
+    }
+
+    @Override
+    public void sendMessage(ServerPlayer player, Component message) {
+        player.sendMessage(message, new UUID(0, 0));
+    }
+
+    @Override
+    public TabList.Skin propertyToSkin(Property property) {
+        return new TabList.Skin(property.getValue(), property.getSignature());
+    }
+
+    @Override
+    public void sendMessage(CommandSourceStack sender, Component message) {
+        sender.sendSuccess(message, false);
+    }
+
+    @Override
+    public String getServerVersion() {
+        return SharedConstants.getCurrentVersion().getName();
+    }
+
+    @Override
+    public double getMSPT() {
+        return ((FabricPlatform)TAB.getInstance().getPlatform()).getServer().getAverageTickTime();
+    }
+
+    @Override
+    public Component deserialize(String string) {
+        return Component.Serializer.fromJson(string);
+    }
+
+    @Override
+    @SneakyThrows
+    public Packet<?> build(TabList.Action action, FabricTabList.Builder entry) {
+        ClientboundPlayerInfoPacket packet = new ClientboundPlayerInfoPacket(ClientboundPlayerInfoPacket.Action.valueOf(action.name()), Collections.emptyList());
+        ReflectionUtils.getFields(ClientboundPlayerInfoPacket.class, List.class).get(0).set(packet,
+                Collections.singletonList(new ClientboundPlayerInfoPacket.PlayerUpdate(
+                        entry.createProfile(),
+                        entry.getLatency(),
+                        GameType.byId(entry.getGameMode()),
+                        entry.getDisplayName()
+                )));
+        return packet;
+    }
+
+    @Override
+    public Level getLevel(ServerPlayer player) {
+        return player.level;
+    }
+
+    @Override
+    public boolean isSneaking(ServerPlayer player) {
+        return player.isCrouching();
+    }
+
+    @Override
+    public EntityData createDataWatcher(TabPlayer viewer, byte flags, String displayName, boolean nameVisible) {
+        SynchedEntityData data = new SynchedEntityData(null);
+        data.define(new EntityDataAccessor<>(0, EntityDataSerializers.BYTE), flags);
+        data.define(new EntityDataAccessor<>(2, EntityDataSerializers.OPTIONAL_COMPONENT),
+                Optional.of(((FabricTabPlayer)viewer).getPlatform().toComponent(IChatBaseComponent.optimizedComponent(displayName), viewer.getVersion())));
+        data.define(new EntityDataAccessor<>(3, EntityDataSerializers.BOOLEAN), nameVisible);
+        data.define(new EntityDataAccessor<>(15, EntityDataSerializers.BYTE), (byte)16);
+        return () -> data;
+    }
+
+    @Override
+    public Packet<?> spawnEntity(int entityId, UUID id, Object entityType, Location location) {
+        return new ClientboundAddEntityPacket(entityId, id, location.getX(), location.getY(), location.getZ(),
+                0, 0, (EntityType<?>) entityType, 0, Vec3.ZERO);
+    }
+
+    @Override
+    public Packet<?> newEntityMetadata(int entityId, EntityData data) {
+        return new ClientboundSetEntityDataPacket(entityId, (SynchedEntityData) data.build(), true);
+    }
+
+    @Override
+    public boolean isSpawnPlayerPacket(Object packet) {
+        return packet instanceof ClientboundAddPlayerPacket;
+    }
+
+    @Override
+    public int getSpawnedPlayer(Object spawnPacket) {
+        return ((ClientboundAddPlayerPacket) spawnPacket).getEntityId();
+    }
+
+    @Override
+    public int[] getDestroyedEntities(Object entityDestroyPacket) {
+        return ((ClientboundRemoveEntitiesPacket) entityDestroyPacket).getEntityIds().toIntArray();
+    }
+
+    @Override
+    public boolean isBundlePacket(Object packet) {
+        return false;
+    }
+
+    @Override
+    public Iterable<Object> getPackets(Object bundlePacket) {
+        return Collections.emptyList();
+    }
+
+    @Override
+    public PipelineInjector createPipelineInjector() {
+        return new FabricPipelineInjector();
+    }
+
+    @Override
+    public void destroyEntities(FabricTabPlayer player, int... entities) {
+        player.sendPacket(new ClientboundRemoveEntitiesPacket(entities));
+    }
+
+    @Override
+    public void registerCommandCallback() {
+        CommandRegistrationCallback.EVENT.register((dispatcher, $) -> new FabricTabCommand().onRegisterCommands(dispatcher));
+    }
+
+    @Override
+    public Packet<?> newHeaderFooter(Component header, Component footer) {
+        return new ClientboundTabListPacket(header, footer);
+    }
+
+    @Override
+    public Packet<?> setDisplaySlot(int slot, Objective objective) {
+        return new ClientboundSetDisplayObjectivePacket(slot, objective);
+    }
+
+    @Override
+    public Objective newObjective(String name, Component displayName, ObjectiveCriteria.RenderType renderType,
+                                  @Nullable Component numberFormat) {
+        return new Objective(dummyScoreboard, name, ObjectiveCriteria.DUMMY, displayName, renderType);
+    }
+
+    @Override
+    public Packet<?> registerTeam(PlayerTeam team) {
+        return ClientboundSetPlayerTeamPacket.createAddOrModifyPacket(team, true);
+    }
+
+    @Override
+    public Packet<?> unregisterTeam(PlayerTeam team) {
+        return ClientboundSetPlayerTeamPacket.createRemovePacket(team);
+    }
+
+    @Override
+    public Packet<?> updateTeam(PlayerTeam team) {
+        return ClientboundSetPlayerTeamPacket.createAddOrModifyPacket(team, false);
+    }
+
+    @Override
+    public Packet<?> setScore(String objective, String scoreHolder, int score, Component displayName, @Nullable Component numberFormat) {
+        return new ClientboundSetScorePacket(ServerScoreboard.Method.CHANGE, objective, scoreHolder, score);
+    }
+
+    @Override
+    public Packet<?> removeScore(String objective, String scoreHolder) {
+        return new ClientboundSetScorePacket(ServerScoreboard.Method.REMOVE, objective, scoreHolder, 0);
+    }
+}

fabric/v1_18_2/build.gradle.kts

@@ -0,0 +1,28 @@
+plugins {
+    id("fabric-loom")
+}
+
+repositories {
+    // Gradle doesn't support combining settings and project repositories, so we have to re-declare all the settings repos we need
+    maven("https://jitpack.io") // YamlAssist
+    maven("https://repo.opencollab.dev/maven-snapshots/")
+    maven("https://repo.viaversion.com/")
+    maven("https://oss.sonatype.org/content/repositories/snapshots")
+}
+
+dependencies {
+    implementation(projects.fabric)
+    minecraft("com.mojang:minecraft:1.18.2")
+    mappings(loom.officialMojangMappings())
+    modImplementation("net.fabricmc:fabric-loader:0.14.17")
+    val fabricApiVersion = "0.76.0+1.18.2"
+    modImplementation(fabricApi.module("fabric-api-base", fabricApiVersion))
+    modImplementation(fabricApi.module("fabric-lifecycle-events-v1", fabricApiVersion))
+    modImplementation(fabricApi.module("fabric-command-api-v1", fabricApiVersion))
+}
+
+tasks {
+    compileJava {
+        options.release.set(17)
+    }
+}