3.1.3

Repo Bumps

api/build.gradle.kts

@@ -1,3 +1,7 @@
+plugins {
+    id("net.kyori.blossom") version "1.2.0"
+}
+
 dependencies {
     compileOnlyApi(libs.netty)
     api(libs.jsonSimple) {
@@ -6,4 +10,16 @@ dependencies {
     compileOnlyApi(libs.snakeyaml)
     api(libs.yamlAssist)
     compileOnlyApi(libs.gson)
+    compileOnlyApi(libs.adventureMiniMessage)
+    compileOnlyApi(libs.adventureApi)
+    compileOnlyApi(libs.adventureLegacy)
+}
+
+blossom {
+    replaceToken("@plugin_version@", project.version)
+    replaceTokenIn("src/main/java/me/neznamy/tab/api/TabConstants.java")
+}
+
+tasks.javadoc {
+    enabled = project.hasProperty("enable-javadoc")
 }

api/src/main/java/me/neznamy/tab/api/FeatureManager.java

@@ -1,5 +1,10 @@
 package me.neznamy.tab.api;
 
+import java.util.UUID;
+
+/**
+ * Feature manager allows registration and work with features.
+ */
 public interface FeatureManager {
 
     /**
@@ -38,4 +43,55 @@ public interface FeatureManager {
      * @return  the feature or null if feature does not exist
      */
     TabFeature getFeature(String name);
+
+    /**
+     * Calls onQuit(TabPlayer) to all enabled features
+     *
+     * @param   disconnectedPlayer
+     *          player who disconnected
+     */
+    void onQuit(TabPlayer disconnectedPlayer);
+
+    /**
+     * Calls onJoin(TabPlayer) to all enabled features
+     *
+     * @param   connectedPlayer
+     *          player who connected
+     */
+    void onJoin(TabPlayer connectedPlayer);
+
+    /**
+     * Calls onServerChange(TabPlayer, String, String) to all enabled features
+     *
+     * @param   playerUUID
+     *          player who switched server
+     * @param   to
+     *          name of the new server
+     */
+    void onServerChange(UUID playerUUID, String to);
+
+    /**
+     * Calls onWorldChange(TabPlayer, String, String) to all enabled features
+     *
+     * @param   playerUUID
+     *          player who switched world
+     * @param   to
+     *          name of the new world
+     */
+    void onWorldChange(UUID playerUUID, String to);
+
+    /**
+     * Calls onCommand(TabPlayer, String) to all enabled features
+     *
+     * @param   sender
+     *          command sender
+     * @param   command
+     *          command line including /
+     * @return  {@code true} if some feature marked the command for cancel, {@code false} if not
+     */
+    boolean onCommand(TabPlayer sender, String command);
+
+    void markObjective();
+
+    void markDisplayObjective();
 }

api/src/main/java/me/neznamy/tab/api/Property.java

@@ -1,5 +1,9 @@
 package me.neznamy.tab.api;
 
+/**
+ * An interface representing a property assigned to a player,
+ * which may contain placeholders and can be changed using the API.
+ */
 public interface Property {
 
     /**

api/src/main/java/me/neznamy/tab/api/PropertyConfiguration.java

@@ -3,30 +3,124 @@ package me.neznamy.tab.api;
 import java.util.*;
 import java.util.stream.Collectors;
 
+/**
+ * Interface representing user or group configuration.
+ * Implementation is either using file or MySQL, if it's enabled.
+ */
 public interface PropertyConfiguration {
 
-    void setProperty(String name, String property, String server, String world, String value);
+    /**
+     * Sets property value of group or user to specified value. If {@code world} or
+     * {@code server} is not {@code null}, value will be inserted as a per-world or
+     * per-server setting. If both {@code world} and {@code server} are {@code null},
+     * value is inserted as a global setting.
+     *
+     * @param   groupOrUser
+     *          Name of group or user, depending on what this instance handles
+     * @param   property
+     *          Name of property to set
+     * @param   server
+     *          Name of server to apply setting to, {@code null} for global setting
+     * @param   world
+     *          Name of world to apply setting to, {@code null} for global setting
+     * @param   value
+     *          Value of the property
+     */
+    void setProperty(String groupOrUser, String property, String server, String world, String value);
 
-    String[] getProperty(String name, String property, String server, String world);
+    /**
+     * Gets property of group or user. If {@code server} or {@code world}
+     * are not {@code null}, per-server / per-world settings are checked first
+     * to try to find a match. If no match is found, global value is returned.
+     * Returned value is an array with 2 elements, with first argument being value
+     * and second being source. If nothing is found, empty array is returned.
+     *
+     * @param   groupOrUser
+     *          Name of group or user, depending on what this instance handles
+     * @param   property
+     *          Name of property to get
+     * @param   server
+     *          Server the player is currently in, to allow check for per-server settings
+     * @param   world
+     *          World the player is currently in, to allow check for per-world settings
+     * @return  Array with 2 elements with value being first, source second if found,
+     *          empty array if nothing was found.
+     */
+    String[] getProperty(String groupOrUser, String property, String server, String world);
 
-    void remove(String name);
+    /**
+     * Removes all data applied to specified group or user.
+     *
+     * @param   groupOrUser
+     *          Name of group or user, depending on what this instance handles
+     */
+    void remove(String groupOrUser);
 
-    Map<String, Object> getGlobalSettings(String name);
+    /**
+     * Returns map of global settings applied to specified group or user.
+     * Map key is property name, value is property value.
+     *
+     * @param   groupOrUser
+     *          Name of group or user, depending on what this instance handles
+     * @return  Map of global settings of specified group or user
+     */
+    Map<String, Object> getGlobalSettings(String groupOrUser);
 
-    Map<String, Map<String, Object>> getPerWorldSettings(String name);
+    /**
+     * Returns map of per-world settings of specified group or user.
+     * Map key is world name, value is property name-value map in that world.
+     *
+     * @param   groupOrUser
+     *          Name of group or user, depending on what this instance handles
+     * @return  Map of per-world settings of specified group or user
+     */
+    Map<String, Map<String, Object>> getPerWorldSettings(String groupOrUser);
 
-    Map<String, Map<String, Object>> getPerServerSettings(String name);
+    /**
+     * Returns map of per-server settings of specified group or user.
+     * Map key is server name, value is property name-value map in that server.
+     *
+     * @param   groupOrUser
+     *          Name of group or user, depending on what this instance handles
+     * @return  Map of per-server settings of specified group or user
+     */
+    Map<String, Map<String, Object>> getPerServerSettings(String groupOrUser);
 
+    /**
+     * Returns set of all groups or users that have anything configured,
+     * either globally or in some world or server.
+     *
+     * @return  Set of all entries with something configured
+     */
     Set<String> getAllEntries();
 
-    default Map<String, Map<String, Object>> convertMap(Map<String, Map<String, Map<String, Object>>> map, String key) {
+    /**
+     * Converts per-world or per-server map into a per-world or per-server map
+     * with values only belonging to entered group or user. In other words, extracts
+     * settings belonging to group or user from the map.
+     *
+     * @param   map
+     *          Original per-world or per-server setting map
+     * @param   groupOrUser
+     *          Name of group or user, depending on what this instance handles
+     * @return  Converted map only containing data of specified group or user
+     */
+    default Map<String, Map<String, Object>> convertMap(Map<String, Map<String, Map<String, Object>>> map, String groupOrUser) {
         Map<String, Map<String, Object>> converted = new HashMap<>();
         for (Map.Entry<String, Map<String, Map<String, Object>>> entry : map.entrySet()) {
-            converted.put(entry.getKey(), entry.getValue().get(key));
+            converted.put(entry.getKey(), entry.getValue().get(groupOrUser));
         }
         return converted;
     }
 
+    /**
+     * Converts object into string. For most objects, {@link Object#toString()} is called.
+     * For lists, entries are connected with {@code "\n"}.
+     *
+     * @param   obj
+     *          Object to convert
+     * @return  Converted string
+     */
     @SuppressWarnings("unchecked")
     default String toString(Object obj) {
         if (obj instanceof List) {
@@ -35,6 +129,15 @@ public interface PropertyConfiguration {
         return obj.toString();
     }
 
+    /**
+     * Converts string into object. If string contains {@code "\n"},
+     * a list is created using {@code "\n"} as a separator. Otherwise,
+     * inserted string is returned.
+     *
+     * @param   string
+     *          String to convert
+     * @return  Converted object
+     */
     default Object fromString(String string) {
         if (string != null && string.contains("\n")) {
             return Arrays.asList(string.split("\n"));

api/src/main/java/me/neznamy/tab/api/ProtocolVersion.java

@@ -8,6 +8,8 @@ public enum ProtocolVersion {
     UNKNOWN_SERVER_VERSION ("Unknown"),
     UNKNOWN_CLIENT_VERSION ("Unknown"),
     PROXY   ("Proxy"),
+    V1_19_1 (760),
+    V1_19   (759),
     V1_18_2 (758),
     V1_18_1 (757),
     V1_18   (757),
@@ -65,13 +67,13 @@ public enum ProtocolVersion {
     /** Value array to iterate over to avoid array creations on each call */
     public static final ProtocolVersion[] VALUES = values();
 
-    //version's network id found at https://wiki.vg/Protocol_version_numbers
+    /** Version's network id found at https://wiki.vg/Protocol_version_numbers */
     private final int networkId;
 
-    //minor version, such as 16
+    /** Version's minor version, such as 16 for 1.16.x */
     private int minorVersion;
 
-    //friendly name displayed in %player-version% placeholder
+    /** Version's friendly name displayed in %player-version% placeholder */
     private final String friendlyName;
 
     /**

api/src/main/java/me/neznamy/tab/api/TabAPI.java

@@ -15,14 +15,31 @@ import me.neznamy.tab.api.team.TeamManager;
  */
 public abstract class TabAPI {
 
+    /** Instance of the API */
     private static TabAPI instance;
 
+    /**
+     * Returns API instance. If instance was not set by the plugin, throws
+     * {@code IllegalStateException}. This is usually caused by shading the API
+     * into own project, which is not allowed. Another option is calling the method
+     * before plugin was able to load.
+     *
+     * @return  API instance
+     * @throws  IllegalStateException
+     *          If instance is {@code null}
+     */
     public static TabAPI getInstance() {
         if (instance == null) throw new IllegalStateException("API instance is null. This likely means you shaded TAB's API into your project" +
                 " instead of only using it, which is not allowed.");
         return instance;
     }
 
+    /**
+     * Instance setter for internal use by the plugin only.
+     *
+     * @param   instance
+     *          API instance
+     */
     public static void setInstance(TabAPI instance) {
         TabAPI.instance = instance;
     }
@@ -53,26 +70,31 @@ public abstract class TabAPI {
     public abstract TabPlayer[] getOnlinePlayers();
 
     /**
-     * Return BossBar manager instance if the feature is enabled. Returns null otherwise.
+     * Return BossBar manager instance if the feature is enabled. If not, returns {@code null}.
      *
      * @return  BossBar manager
      */
     public abstract BossBarManager getBossBarManager();
 
     /**
-     * Returns scoreboard manager instance if the feature is enabled. Returns null otherwise.
+     * Returns scoreboard manager instance if the feature is enabled. If not, returns {@code null}.
      *
      * @return  scoreboard manager
      */
     public abstract ScoreboardManager getScoreboardManager();
 
     /**
-     * Returns team manager instance if the feature is enabled, false otherwise
+     * Returns team manager instance if the feature is enabled. If not, returns {@code null}.
      *
      * @return  team manager
      */
     public abstract TeamManager getTeamManager();
 
+    /**
+     * Returns header/footer manager instance if the feature is enabled. If not, returns {@code null}.
+     *
+     * @return  Header/footer manager
+     */
     public abstract HeaderFooterManager getHeaderFooterManager();
 
     /**
@@ -89,6 +111,11 @@ public abstract class TabAPI {
      */
     public abstract FeatureManager getFeatureManager();
 
+    /**
+     * Returns Tablist name format manager instance if the feature is enabled. If not, returns {@code null}.
+     *
+     * @return  Tablist name format manager
+     */
     public abstract TablistFormatManager getTablistFormatManager();
 
     /**
@@ -111,23 +138,79 @@ public abstract class TabAPI {
      * @param   message
      *          message to print
      * @param   translateColors
-     *          true if colors should be translated, false if not
+     *          {@code true} if colors should be translated, {@code false} if not
      */
     public abstract void sendConsoleMessage(String message, boolean translateColors);
 
+    /**
+     * Returns TAB's Thread manager, which allows task submitting
+     *
+     * @return  ThreadManager instance
+     */
     public abstract ThreadManager getThreadManager();
 
+    /**
+     * Returns TAB's cache file used to store player toggle data
+     *
+     * @return  TAB's player cache file
+     */
     public abstract ConfigurationFile getPlayerCache();
 
+    /**
+     * Returns TAB's config.yml file
+     *
+     * @return  config.yml file
+     */
     public abstract ConfigurationFile getConfig();
 
+    /**
+     * Returns TAB's group configuration
+     *
+     * @return  TAB's group configuration
+     */
     public abstract PropertyConfiguration getGroups();
 
+    /**
+     * Returns TAB's user configuration
+     *
+     * @return  TAB's user configuration
+     */
     public abstract PropertyConfiguration getUsers();
 
+    /**
+     * Sends a debug message into console if the option
+     * is enabled in config.
+     *
+     * @param   message
+     *          Message to send
+     */
     public abstract void debug(String message);
 
+    /**
+     * Logs an error into errors.log file
+     *
+     * @param   message
+     *          Error message
+     * @param   t
+     *          Thrown error
+     */
     public abstract void logError(String message, Throwable t);
 
+    /**
+     * Sets name of file with syntax error, which prevented
+     * the plugin from enabling. Internal use only.
+     *
+     * @param   file
+     *          Name of file with syntax error
+     */
     public abstract void setBrokenFile(String file);
+
+    /**
+     * Returns {@code true} if the plugin is currently disabled due to an error,
+     * either a yaml syntax error or an internal startup error. Returns {@code false}
+     * if the plugin is properly running.
+     *
+     * @return  {@code true} if disabled, {@code false} if running correctly
+     */
+    public abstract boolean isPluginDisabled();
 }

api/src/main/java/me/neznamy/tab/api/TabConstants.java

@@ -1,4 +1,4 @@
-package me.neznamy.tab.shared;
+package me.neznamy.tab.api;
 
 /**
  * A class containing various constants used everywhere in the plugin
@@ -7,7 +7,8 @@ package me.neznamy.tab.shared;
 public class TabConstants {
 
     public static final String PLUGIN_VERSION = "@plugin_version@";
-    public static final String DEFAULT_GROUP = "NONE";
+    public static final String NO_GROUP = "NONE";
+    public static final String DEFAULT_GROUP = "_DEFAULT_";
     public static final String PLUGIN_MESSAGE_CHANNEL_NAME = "tab:bridge-2";
     public static final String REDIS_CHANNEL_NAME = "TAB";
 
@@ -49,7 +50,6 @@ public class TabConstants {
         public static final String PLACEHOLDER_REFRESHING = "Refreshing placeholders";
         public static final String GROUP_REFRESHING = "Refreshing groups";
 
-        public static final String V1_8_0_BUG_COMPENSATION = "Compensating for 1.8.0 bugs";
         public static final String REFRESHING_NAME_TAG_VISIBILITY = "Refreshing NameTag visibility";
         public static final String SCOREBOARD_PACKET_CHECK = "Checking for other plugins";
         public static final String PROCESSING_PLAYER_MOVEMENT = "Processing player movement";
@@ -260,6 +260,10 @@ public class TabConstants {
             return "scoreboard-" + line;
         }
 
+        public static String scoreboardLine(String scoreboard, int index) {
+            return "scoreboard-score-" + scoreboard + "-" + index;
+        }
+
         public static String layout(String name) {
             return "layout-" + name;
         }
@@ -279,9 +283,87 @@ public class TabConstants {
         public static String bossBarColorStyle(String name) {
             return "BossBar-color-style-" + name;
         }
+    }
 
-        public static String scoreboardLine(String scoreboard, int index) {
-            return "scoreboard-score-" + scoreboard + "-" + index;
+    /**
+     * All internal placeholders offered by the plugin
+     */
+    public static class Placeholder {
+
+        // Universal
+        public static final String DISPLAY_NAME = "%displayname%";
+        public static final String GROUP = "%group%";
+        public static final String VANISHED = "%vanished%";
+        public static final String WORLD = "%world%";
+        public static final String WORLD_ONLINE = "%worldonline%";
+        public static final String SERVER = "%server%";
+        public static final String SERVER_ONLINE = "%serveronline%";
+        public static final String PLAYER = "%player%";
+        public static final String TIME = "%time%";
+        public static final String DATE = "%date%";
+        public static final String PING = "%ping%";
+        public static final String PLAYER_VERSION = "%player-version%";
+        public static final String PLAYER_VERSION_ID = "%player-version-id%";
+        public static final String MEMORY_USED = "%memory-used%";
+        public static final String MEMORY_MAX = "%memory-max%";
+        public static final String MEMORY_USED_GB = "%memory-used-gb%";
+        public static final String MEMORY_MAX_GB = "%memory-max-gb%";
+        public static final String ONLINE = "%online%";
+        public static final String STAFF_ONLINE = "%staffonline%";
+        public static final String NON_STAFF_ONLINE = "%nonstaffonline%";
+        public static final String LUCKPERMS_PREFIX = "%luckperms-prefix%";
+        public static final String LUCKPERMS_SUFFIX = "%luckperms-suffix%";
+        public static final String COUNTDOWN = "%countdown%";
+
+        // Placeholders for internal use
+        public static final String COLLISION = "%collision%";
+        public static final String INVISIBLE = "%invisible%";
+        public static final String VEHICLE = "%vehicle%";
+
+        // Bukkit only
+        public static final String TPS = "%tps%";
+        public static final String MSPT = "%mspt%";
+        public static final String AFK = "%afk%";
+        public static final String ESSENTIALS_NICK = "%essentialsnick%";
+        public static final String VAULT_PREFIX = "%vault-prefix%";
+        public static final String VAULT_SUFFIX = "%vault-suffix%";
+        public static final String HEALTH = "%health%";
+
+        public static String condition(String name) {
+            return "%condition:" + name + "%";
+        }
+
+        public static String animation(String name) {
+            return "%animation:" + name + "%";
         }
     }
+
+    /**
+     * All plugins TAB hooks into
+     */
+    public static class Plugin {
+
+        public static final String LUCKPERMS = "LuckPerms";
+        public static final String VAULT = "Vault";
+        public static final String PLACEHOLDER_API = "PlaceholderAPI";
+        public static final String LIBS_DISGUISES = "LibsDisguises";
+        public static final String VIAVERSION = "ViaVersion";
+        public static final String PROTOCOL_SUPPORT = "ProtocolSupport";
+        public static final String ESSENTIALS = "Essentials";
+        public static final String REDIS_BUNGEE = "RedisBungee";
+        public static final String PREMIUM_VANISH = "PremiumVanish";
+    }
+
+    /**
+     * TAB's custom metrics charts
+     */
+    public static class MetricsChart {
+
+        public static final String PERMISSION_SYSTEM = "permission_system";
+        public static final String GLOBAL_PLAYER_LIST_ENABLED = "global_playerlist_enabled";
+        public static final String PLACEHOLDER_API = "placeholderapi";
+        public static final String SERVER_VERSION = "server_version";
+        public static final String UNLIMITED_NAME_TAG_MODE_ENABLED = "unlimited_nametag_mode_enabled";
+
+    }
 }

api/src/main/java/me/neznamy/tab/api/TabFeature.java

@@ -6,38 +6,53 @@ import me.neznamy.tab.api.protocol.PacketPlayOutPlayerInfo;
 import me.neznamy.tab.api.protocol.PacketPlayOutScoreboardDisplayObjective;
 import me.neznamy.tab.api.protocol.PacketPlayOutScoreboardObjective;
 
+/**
+ * Abstract class representing a core feature of the plugin.
+ * <p>
+ * It receives all kinds of events and can react to them.
+ */
 public abstract class TabFeature {
 
+    /** Feature's name displayed in /tab cpu */
     private final String featureName;
+
+    /** Feature's function name displayed in place of refreshing in /tab cpu */
     private final String refreshDisplayName;
-    protected final String[] disabledServers;
-    private final boolean serverWhitelistMode;
-    protected final String[] disabledWorlds;
-    private final boolean worldWhitelistMode;
+
+    /** Servers where the feature is disabled (or enabled if using whitelist mode) */
+    protected String[] disabledServers = new String[0];
+
+    /** Flag tracking whether disabled server list is a whitelist or blacklist */
+    private boolean serverWhitelistMode = false;
+
+    /** Worlds where the feature is disabled (or enabled if using whitelist mode) */
+    protected String[] disabledWorlds = new String[0];
+
+    /** Flag tracking whether disabled world list is a whitelist or blacklist */
+    private boolean worldWhitelistMode = false;
+
+    /** Players located in currently disabled worlds / servers */
     private final Set<TabPlayer> disabledPlayers = Collections.newSetFromMap(new WeakHashMap<>());
+
+    /**
+     * List of methods overridden (implemented) by each feature.
+     * If a method is not overridden, it is not called at all.
+     * This avoids a massive spam for every single method
+     * in every single feature in /tab cpu output
+     */
     private final List<String> methodOverrides = new ArrayList<>();
 
+    /**
+     * Constructs new instance with given parameters and loads method overrides
+     *
+     * @param   featureName
+     *          Feature's name in /tab cpu
+     * @param   refreshDisplayName
+     *          "refreshing" cpu display type name of the feature
+     */
     protected TabFeature(String featureName, String refreshDisplayName) {
-        this(featureName, refreshDisplayName, null, null);
-    }
-
-    protected TabFeature(String featureName, String refreshDisplayName, List<String> disabledServers, List<String> disabledWorlds) {
         this.featureName = featureName;
         this.refreshDisplayName = refreshDisplayName;
-        if (disabledServers != null) {
-            this.disabledServers = disabledServers.toArray(new String[0]);
-            serverWhitelistMode = disabledServers.contains("WHITELIST");
-        } else {
-            this.disabledServers = new String[0];
-            serverWhitelistMode = false;
-        }
-        if (disabledWorlds != null) {
-            this.disabledWorlds = disabledWorlds.toArray(new String[0]);
-            worldWhitelistMode = disabledWorlds.contains("WHITELIST");
-        } else {
-            this.disabledWorlds = new String[0];
-            worldWhitelistMode = false;
-        }
         try {
             if (getClass().getMethod("onCommand", TabPlayer.class, String.class).getDeclaringClass() != TabFeature.class)
                 methodOverrides.add("onCommand");
@@ -49,12 +64,16 @@ public abstract class TabFeature {
                 methodOverrides.add("onWorldChange");
             if (getClass().getMethod("onServerChange", TabPlayer.class, String.class, String.class).getDeclaringClass() != TabFeature.class)
                 methodOverrides.add("onServerChange");
-            if (getClass().getMethod("onDisplayObjective", TabPlayer.class, PacketPlayOutScoreboardDisplayObjective.class).getDeclaringClass() != TabFeature.class)
+            if (getClass().getMethod("onDisplayObjective", TabPlayer.class, PacketPlayOutScoreboardDisplayObjective.class).getDeclaringClass() != TabFeature.class) {
                 methodOverrides.add("onDisplayObjective");
+                TabAPI.getInstance().getFeatureManager().markDisplayObjective();
+            }
             if (getClass().getMethod("onLoginPacket", TabPlayer.class).getDeclaringClass() != TabFeature.class)
                 methodOverrides.add("onLoginPacket");
-            if (getClass().getMethod("onObjective", TabPlayer.class, PacketPlayOutScoreboardObjective.class).getDeclaringClass() != TabFeature.class)
+            if (getClass().getMethod("onObjective", TabPlayer.class, PacketPlayOutScoreboardObjective.class).getDeclaringClass() != TabFeature.class) {
                 methodOverrides.add("onObjective");
+                TabAPI.getInstance().getFeatureManager().markObjective();
+            }
             if (getClass().getMethod("onPlayerInfo", TabPlayer.class, PacketPlayOutPlayerInfo.class).getDeclaringClass() != TabFeature.class)
                 methodOverrides.add("onPlayerInfo");
             if (getClass().getMethod("onPacketReceive", TabPlayer.class, Object.class).getDeclaringClass() != TabFeature.class)
@@ -71,7 +90,34 @@ public abstract class TabFeature {
     }
 
     /**
-     * Loads all players and sends packets
+     * Constructs new instance with given parameters and loads method overrides.
+     * Also loads lists of disabled worlds and servers of this feature with config
+     * section path specified with {@code configSection} parameter.
+     *
+     * @param   featureName
+     *          Feature's name in /tab cpu
+     * @param   refreshDisplayName
+     *          "refreshing" cpu display type name of the feature
+     * @param   configSection
+     *          Configuration section of the feature to load disabled
+     *          servers / worlds from
+     */
+    protected TabFeature(String featureName, String refreshDisplayName, String configSection) {
+        this(featureName, refreshDisplayName);
+        List<String> disabledServers = TabAPI.getInstance().getConfig().getStringList(configSection + ".disable-in-servers");
+        List<String> disabledWorlds = TabAPI.getInstance().getConfig().getStringList(configSection + ".disable-in-worlds");
+        if (disabledServers != null) {
+            this.disabledServers = disabledServers.toArray(new String[0]);
+            serverWhitelistMode = disabledServers.contains("WHITELIST");
+        }
+        if (disabledWorlds != null) {
+            this.disabledWorlds = disabledWorlds.toArray(new String[0]);
+            worldWhitelistMode = disabledWorlds.contains("WHITELIST");
+        }
+    }
+
+    /**
+     * Loads all online players and sends packets
      */
     public void load() {
         //empty by default
@@ -85,13 +131,13 @@ public abstract class TabFeature {
     }
 
     /**
-     * Processes command from player
+     * Processes command from player. This is typically a toggle command.
      *
      * @param   sender
      *          command sender
      * @param   message
      *          command line
-     * @return  true if event should be cancelled, false if not
+     * @return  {@code true} if event should be cancelled, {@code true} if not
      */
     public boolean onCommand(TabPlayer sender, String message) {
         return false;
@@ -232,6 +278,12 @@ public abstract class TabFeature {
         //empty by default
     }
 
+    /**
+     * Processes vanish status change of player
+     *
+     * @param   player
+     *          Player who changed vanish status
+     */
     public void onVanishStatusChange(TabPlayer player){
         //empty by default
     }
@@ -248,13 +300,13 @@ public abstract class TabFeature {
     }
 
     /**
-     * Returns true if world or server is disabled, false if not
+     * Returns {@code true} if world or server is disabled, {@code false} if not
      *
      * @param   server
      *          server to check
      * @param   world
      *          world to check
-     * @return  true if feature should be disabled, false if not
+     * @return  {@code true} if feature should be disabled, {@code false} if not
      */
     public boolean isDisabled(String server, String world) {
         boolean contains = contains(disabledWorlds, world);
@@ -265,6 +317,17 @@ public abstract class TabFeature {
         return contains;
     }
 
+    /**
+     * Returns {@code true} if list contains the specified element or element
+     * ends with {@code "*"} and element meeting that requirement is present,
+     * {@code false} otherwise.
+     *
+     * @param   list
+     *          List to check
+     * @param   element
+     *          Element to find
+     * @return  {@code true} if element was found, {@code false} if not
+     */
     protected boolean contains(String[] list, String element) {
         if (element == null) return false;
         for (String s : list) {
@@ -286,24 +349,60 @@ public abstract class TabFeature {
         return featureName;
     }
 
+    /**
+     * Returns text to display in /tab cpu of this feature refreshing visuals
+     *
+     * @return  Text to display as refreshing of this feature
+     */
+    public String getRefreshDisplayName() {
+        return refreshDisplayName;
+    }
+
+    /**
+     * Returns {@code true} if method with specified name is overridden
+     * in the implementation, {@code false} if not
+     *
+     * @param   method
+     *          Method to check
+     * @return  {@code true} if overridden, {@code false} if not
+     */
     public boolean overridesMethod(String method) {
         return methodOverrides.contains(method);
     }
 
+    /**
+     * Returns {@code true} if player is currently located in a server
+     * or world, which is marked as disabled, {@code false} if not
+     *
+     * @param   p
+     *          Player to check
+     * @return  {@code true} if player is in disabled server / world,
+     *          {@code false} if not
+     */
     public boolean isDisabledPlayer(TabPlayer p) {
         return disabledPlayers.contains(p);
     }
 
+    /**
+     * Adds specified player into list of players in disabled
+     * servers / worlds.
+     *
+     * @param   p
+     *          Player to add
+     */
     public void addDisabledPlayer(TabPlayer p) {
         if (disabledPlayers.contains(p)) return;
         disabledPlayers.add(p);
     }
 
+    /**
+     * Removes specified player from list of players in disabled
+     * servers / worlds
+     *
+     * @param   p
+     *          Player to check
+     */
     public void removeDisabledPlayer(TabPlayer p) {
         disabledPlayers.remove(p);
     }
-
-    public String getRefreshDisplayName() {
-        return refreshDisplayName;
-    }
 }

api/src/main/java/me/neznamy/tab/api/TabPlayer.java

@@ -114,34 +114,12 @@ public interface TabPlayer {
      */
     void sendPacket(Object packet);
 
-    /**
-     * Sends the player a platform-specific packet and adds that packet into counter that
-     * is displayed in /tab cpu
-     *
-     * @param   packet
-     *          an instance of packet depending on platform
-     * @param   feature
-     *          feature to increment sent packet counter of
-     */
-    void sendPacket(Object packet, TabFeature feature);
-
-    /**
-     * Sends the player a platform-specific packet and adds that packet into counter that
-     * is displayed in /tab cpu
-     *
-     * @param   packet
-     *          an instance of packet depending on platform
-     * @param   feature
-     *          feature to increment sent packet counter of
-     */
-    void sendPacket(Object packet, String feature);
-
     /**
      * Returns player's property by name
      *
      * @param   name
      *          name of property
-     * @return  the property or null if not found
+     * @return  the property or {@code null} if not found
      */
     Property getProperty(String name);
 
@@ -164,14 +142,7 @@ public interface TabPlayer {
     void sendMessage(IChatBaseComponent message);
 
     /**
-     * Returns player's primary permission group
-     *
-     * @return  player's group depending on configuration
-     */
-    String getGroup();
-
-    /**
-     * Returns player's channel or null if server is 1.7 or older
+     * Returns player's netty channel. On servers running version 1.7 or older returns {@code null}.
      *
      * @return  player's channel
      */
@@ -194,13 +165,14 @@ public interface TabPlayer {
     /**
      * Returns true once the player is successfully loaded (onJoin method ran through all methods)
      *
-     * @return  true if player is fully loaded, false otherwise
+     * @return  {@code true} if player is fully loaded, {@code false} otherwise
      */
     boolean isLoaded();
 
     /**
      * Sets property with specified name to new value. If property did not exist before, it is
-     * created and true is returned. If it existed, it is overridden and true is returned. False is returned otherwise.
+     * created and {@code true} is returned. If it existed, it is overridden and {@code true} is returned.
+     * {@code false} is returned otherwise.
      *
      * @param   feature
      *          feature using this property to get placeholders registered
@@ -208,7 +180,7 @@ public interface TabPlayer {
      *          property name
      * @param   rawValue
      *          new raw value
-     * @return  true if value changed / did not exist, false if value did not change
+     * @return  {@code true} if value changed / did not exist, {@code false} if value did not change
      */
     boolean setProperty(TabFeature feature, String identifier, String rawValue);
 
@@ -217,24 +189,24 @@ public interface TabPlayer {
      *
      * @param   property
      *          property name to load
-     * @return  true if value did not exist or changed, false otherwise
+     * @return  {@code true} if value did not exist or changed, {@code false} otherwise
      */
     boolean loadPropertyFromConfig(TabFeature feature, String property);
 
     /**
      * Loads property from config using standard property loading algorithm. If the property is
-     * not set in config, sets it to ifNotSet value
+     * not set in config, {@code ifNotSet} value is used.
      *
      * @param   property
      *          property name to load
      * @param   ifNotSet
      *          value to use if property is not defined in config
-     * @return  true if value did not exist or changed, false otherwise
+     * @return  {@code true} if value did not exist or changed, {@code false} otherwise
      */
     boolean loadPropertyFromConfig(TabFeature feature, String property, String ifNotSet);
 
     /**
-     * Returns name of player's scoreboard team or null if NameTag feature is disabled
+     * Returns name of player's scoreboard team or {@code null} if NameTag feature is disabled
      *
      * @return  name of player's team
      */
@@ -248,32 +220,31 @@ public interface TabPlayer {
     String getTeamNameNote();
 
     /**
-     * Returns true if player is disguised using LibsDisguises
+     * Returns {@code true} if player is disguised using LibsDisguises, {@code false} if not
      *
-     * @return  true if player is disguised, false if not
+     * @return  {@code true} if player is disguised, {@code false} if not
      */
     boolean isDisguised();
 
     /**
-     * Returns true if player has invisibility potion, false if not. For bukkit, API is used, for BungeeCord
-     * bukkit bridge is used
+     * Returns {@code true} if player has invisibility potion, {@code false} if not.
+     * For bukkit, API is used, for BungeeCord, bridge is used.
      *
-     * @return  true if player has invisibility potion, false if not
+     * @return  {@code true} if player has invisibility potion, {@code false} if not
      */
     boolean hasInvisibilityPotion();
 
     /**
-     * Currently only PV hook on BungeeCord for global PlayerList function. Looking to expand this
-     * in the future
+     * Checks if player is vanished using any supported vanish plugin and returns the result.
      *
-     * @return  true if vanished with PV on BungeeCord
+     * @return  {@code true} if player is vanished, {@code false} if not
      */
     boolean isVanished();
 
     /**
-     * Returns true if player is online according to server
+     * Calls platform-specific method and returns the result
      *
-     * @return  true if online, false if not
+     * @return  {@code true} if player is online, {@code false} if not
      */
     boolean isOnline();
     
@@ -283,14 +254,60 @@ public interface TabPlayer {
      * @return  GameMode of the player
      */
     int getGamemode();
-    
+
+    /**
+     * Returns {@code true} if this is a bedrock player, {@code false} if not
+     *
+     * @return  {@code true} if player is a bedrock player, {@code false} if not
+     */
     boolean isBedrockPlayer();
 
+    /**
+     * Returns player's primary permission group. If group has been changed using
+     * {@link #setTemporaryGroup(String)}, returns that value. Otherwise, returns group
+     * detected by standard group assign logic
+     *
+     * @return  player's primary permission group
+     */
+    String getGroup();
+
+    /**
+     * Temporarily overrides player's group and applies all changes coming from new group.
+     * This includes all properties and sorting, if used.
+     *
+     * @param   group
+     *          New group to use
+     * @see     #hasTemporaryGroup()
+     * @see     #resetTemporaryGroup()
+     */
     void setTemporaryGroup(String group);
 
+    /**
+     * Returns temporary group applied to the player using {@link #setTemporaryGroup(String)}.
+     * If no group was set, returns {@code null}
+     *
+     * @return  Temporary group assigned to player or {@code null} if not set
+     * @see     #setTemporaryGroup(String)
+     * @see     #resetTemporaryGroup()
+     */
     boolean hasTemporaryGroup();
 
+    /**
+     * Resets temporary group assigned using {@link #setTemporaryGroup(String)}.
+     * If no temporary group is set, doesn't do anything.
+     *
+     * @see     #setTemporaryGroup(String)
+     * @see     #hasTemporaryGroup()
+     */
     void resetTemporaryGroup();
 
+    /**
+     * Returns player's game profile name as seen by other players. By default,
+     * this returns player's name. If using a nickname / disguise plugin that changes
+     * game profile name for other players and change was successfully detected, returns
+     * that value.
+     *
+     * @return  player's game profile name as seen by other players
+     */
     String getNickname();
 }

api/src/main/java/me/neznamy/tab/api/TablistFormatManager.java

@@ -1,29 +1,168 @@
 package me.neznamy.tab.api;
 
+/**
+ * An interface allowing to modify tablist display names
+ * of players.
+ * <p>
+ * Instance can be obtained using {@link TabAPI#getTablistFormatManager()}.
+ * This requires the feature to be enabled in config, otherwise the method will
+ * return {@code null}.
+ */
 public interface TablistFormatManager {
 
+    /**
+     * Changes player's prefix to provided value. Supports placeholders,
+     * as well as any supported RGB formats.
+     *
+     * @param   player
+     *          player to change prefix of
+     * @param   prefix
+     *          new prefix value
+     * @see     #resetPrefix(TabPlayer)
+     * @see     #getCustomPrefix(TabPlayer)
+     * @see     #getOriginalPrefix(TabPlayer)
+     */
     void setPrefix(TabPlayer player, String prefix);
-    
+
+    /**
+     * Changes player's name to provided value. Supports placeholders,
+     * as well as any supported RGB formats.
+     *
+     * @param   player
+     *          player to change prefix of
+     * @param   customName
+     *          new customName value
+     * @see     #resetName(TabPlayer)
+     * @see     #getCustomName(TabPlayer)
+     * @see     #getOriginalName(TabPlayer)
+     */
     void setName(TabPlayer player, String customName);
-    
+
+    /**
+     * Changes player's suffix to provided value. Supports placeholders,
+     * as well as any supported RGB formats.
+     *
+     * @param   player
+     *          player to change prefix of
+     * @param   suffix
+     *          new suffix value
+     * @see     #resetSuffix(TabPlayer)
+     * @see     #getCustomSuffix(TabPlayer)
+     * @see     #getOriginalSuffix(TabPlayer)
+     */
     void setSuffix(TabPlayer player, String suffix);
-    
+
+    /**
+     * Resets player's prefix previously assigned using {@link #setPrefix(TabPlayer, String)}
+     * method. If nothing was set, this method will not do anything.
+     *
+     * @param   player
+     *          player to reset prefix of
+     * @see     #setPrefix(TabPlayer, String)
+     * @see     #getCustomPrefix(TabPlayer)
+     * @see     #getOriginalPrefix(TabPlayer)
+     */
     void resetPrefix(TabPlayer player);
-    
+
+    /**
+     * Resets player's custom name previously assigned using {@link #setName(TabPlayer, String)}
+     * method. If nothing was set, this method will not do anything.
+     *
+     * @param   player
+     *          player to reset name of
+     * @see     #setName(TabPlayer, String)
+     * @see     #getCustomName(TabPlayer)
+     * @see     #getOriginalName(TabPlayer)
+     */
     void resetName(TabPlayer player);
-    
+
+    /**
+     * Resets player's suffix previously assigned using {@link #setSuffix(TabPlayer, String)}
+     * method. If nothing was set, this method will not do anything.
+     *
+     * @param   player
+     *          player to reset suffix of
+     * @see     #setSuffix(TabPlayer, String)
+     * @see     #getCustomSuffix(TabPlayer)
+     * @see     #getOriginalSuffix(TabPlayer)
+     */
     void resetSuffix(TabPlayer player);
-    
+
+    /**
+     * Returns prefix assigned using {@link #setPrefix(TabPlayer, String)} method.
+     * If the method was not used, {@code null} is returned.
+     *
+     * @param   player
+     *          player to get custom prefix of
+     * @return  player's custom prefix or {@code null} if not defined
+     * @see     #setPrefix(TabPlayer, String)
+     * @see     #resetPrefix(TabPlayer)
+     * @see     #getOriginalPrefix(TabPlayer)
+     */
     String getCustomPrefix(TabPlayer player);
-    
+
+    /**
+     * Returns custom name assigned using {@link #setName(TabPlayer, String)} method.
+     * If the method was not used, {@code null} is returned.
+     *
+     * @param   player
+     *          player to get custom name of
+     * @return  player's custom name or {@code null} if not defined
+     * @see     #setName(TabPlayer, String)
+     * @see     #resetName(TabPlayer)
+     * @see     #getOriginalName(TabPlayer)
+     */
     String getCustomName(TabPlayer player);
-    
+
+    /**
+     * Returns suffix assigned using {@link #setSuffix(TabPlayer, String)} method.
+     * If the method was not used, {@code null} is returned.
+     *
+     * @param   player
+     *          player to get custom suffix of
+     * @return  player's custom suffix or {@code null} if not defined
+     * @see     #setSuffix(TabPlayer, String)
+     * @see     #resetSuffix(TabPlayer)
+     * @see     #getOriginalSuffix(TabPlayer)
+     */
     String getCustomSuffix(TabPlayer player);
-    
+
+    /**
+     * Returns player's original prefix applied using plugin's internal logic.
+     * This value is not affected by API calls in any way.
+     *
+     * @param   player
+     *          player to get original prefix of
+     * @return  player's original prefix
+     * @see     #setPrefix(TabPlayer, String)
+     * @see     #resetPrefix(TabPlayer)
+     * @see     #getCustomPrefix(TabPlayer)
+     */
     String getOriginalPrefix(TabPlayer player);
-    
+
+    /**
+     * Returns player's original name applied using plugin's internal logic.
+     * This value is not affected by API calls in any way.
+     *
+     * @param   player
+     *          player to get original name of
+     * @return  player's original name
+     * @see     #setName(TabPlayer, String)
+     * @see     #resetName(TabPlayer)
+     * @see     #getCustomName(TabPlayer)
+     */
     String getOriginalName(TabPlayer player);
-    
+
+    /**
+     * Returns player's original suffix applied using plugin's internal logic.
+     * This value is not affected by API calls in any way.
+     *
+     * @param   player
+     *          player to get original suffix of
+     * @return  player's original suffix
+     * @see     #setSuffix(TabPlayer, String)
+     * @see     #resetSuffix(TabPlayer)
+     * @see     #getCustomSuffix(TabPlayer)
+     */
     String getOriginalSuffix(TabPlayer player);
-    
 }

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

@@ -199,4 +199,12 @@ public interface BossBar {
      * @return  {@code true} if contains, {@code false} if not
      */
     boolean containsPlayer(TabPlayer player);
+
+    /**
+     * Returns {@code true} if this bossbar in configured as announcement-only bar,
+     * {@code false} if not.
+     *
+     * @return  {@code true} if bar is announcement only, {@code false} if not
+     */
+    boolean isAnnouncementBar();
 }

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

@@ -4,15 +4,16 @@ import java.util.List;
 import java.util.Map;
 import java.util.UUID;
 
+import me.neznamy.tab.api.TabAPI;
 import me.neznamy.tab.api.TabPlayer;
 
 /**
  * An interface allowing work with BossBars such as creating, sending
  * and toggling.
  * <p>
- * Instance can be obtained using {@link me.neznamy.tab.api.TabAPI#getBossBarManager()}.
+ * Instance can be obtained using {@link TabAPI#getBossBarManager()}.
  * This requires the BossBar feature to be enabled in config, otherwise the method will
- * return null.
+ * return {@code null}.
  */
 public interface BossBarManager {
 

api/src/main/java/me/neznamy/tab/api/chat/IChatBaseComponent.java

@@ -231,7 +231,7 @@ public class IChatBaseComponent {
      */
     public static IChatBaseComponent fromColoredText(String originalText){
         Preconditions.checkNotNull(originalText, "text");
-        String text = RGBUtils.getInstance().applyFormats(EnumChatFormat.color(originalText), false);
+        String text = RGBUtils.getInstance().applyFormats(EnumChatFormat.color(originalText));
         List<IChatBaseComponent> components = new ArrayList<>();
         StringBuilder builder = new StringBuilder();
         IChatBaseComponent component = new IChatBaseComponent();
@@ -424,7 +424,7 @@ public class IChatBaseComponent {
         if (text == null) return null;
         if (componentCache.containsKey(text)) return componentCache.get(text);
         IChatBaseComponent component;
-        if (text.contains("#") || text.contains("&x") || text.contains(EnumChatFormat.COLOR_CHAR + "x")){
+        if (text.contains("#") || text.contains("&x") || text.contains(EnumChatFormat.COLOR_CHAR + "x") || text.contains("<")){
             //contains RGB colors
             component = IChatBaseComponent.fromColoredText(text);
         } else {

api/src/main/java/me/neznamy/tab/api/chat/WrappedChatComponent.java

@@ -0,0 +1,75 @@
+package me.neznamy.tab.api.chat;
+
+import me.neznamy.tab.api.ProtocolVersion;
+
+import java.util.List;
+
+/**
+ * A class extending IChatBaseComponent that holds the original value
+ * to avoid deserializing it, which is an unnecessary operation that
+ * slows down the performance, as well as makes code more complicated
+ * and open to problems.
+ */
+public class WrappedChatComponent extends IChatBaseComponent {
+
+    /** Original NMS component */
+    private final Object originalComponent;
+
+    /**
+     * Constructs new instance with given parameter
+     *
+     * @param   originalComponent
+     *          Original NMS component
+     */
+    public WrappedChatComponent(Object originalComponent) {
+        this.originalComponent = originalComponent;
+    }
+
+    /**
+     * Returns the original NMS component
+     * @return  the original NMS component
+     */
+    public Object get() {
+        return originalComponent;
+    }
+
+    @Override
+    public String toString() {
+        throw new UnsupportedOperationException("Not supported for " + getClass().getSimpleName());
+    }
+
+    @Override
+    public String toString(ProtocolVersion clientVersion) {
+        throw new UnsupportedOperationException("Not supported for " + getClass().getSimpleName());
+    }
+
+    @Override
+    public List<IChatBaseComponent> getExtra(){
+        throw new UnsupportedOperationException("Not supported for " + getClass().getSimpleName());
+    }
+
+    @Override
+    public String getText() {
+        throw new UnsupportedOperationException("Not supported for " + getClass().getSimpleName());
+    }
+
+    @Override
+    public ChatModifier getModifier() {
+        throw new UnsupportedOperationException("Not supported for " + getClass().getSimpleName());
+    }
+
+    @Override
+    public IChatBaseComponent setExtra(List<IChatBaseComponent> components){
+        throw new UnsupportedOperationException("Not supported for " + getClass().getSimpleName());
+    }
+
+    @Override
+    public void addExtra(IChatBaseComponent child) {
+        throw new UnsupportedOperationException("Not supported for " + getClass().getSimpleName());
+    }
+
+    @Override
+    public void setModifier(ChatModifier modifier) {
+        throw new UnsupportedOperationException("Not supported for " + getClass().getSimpleName());
+    }
+}

api/src/main/java/me/neznamy/tab/api/chat/rgb/RGBUtils.java

@@ -1,15 +1,13 @@
 package me.neznamy.tab.api.chat.rgb;
 
+import java.util.ArrayList;
+import java.util.List;
 import java.util.regex.Matcher;
 import java.util.regex.Pattern;
 
 import me.neznamy.tab.api.chat.EnumChatFormat;
 import me.neznamy.tab.api.chat.TextColor;
-import me.neznamy.tab.api.chat.rgb.format.BukkitFormat;
-import me.neznamy.tab.api.chat.rgb.format.CMIFormat;
-import me.neznamy.tab.api.chat.rgb.format.HtmlFormat;
-import me.neznamy.tab.api.chat.rgb.format.RGBFormatter;
-import me.neznamy.tab.api.chat.rgb.format.UnnamedFormat1;
+import me.neznamy.tab.api.chat.rgb.format.*;
 import me.neznamy.tab.api.chat.rgb.gradient.CMIGradient;
 import me.neznamy.tab.api.chat.rgb.gradient.CommonGradient;
 import me.neznamy.tab.api.chat.rgb.gradient.GradientPattern;
@@ -40,12 +38,18 @@ public class RGBUtils {
      * Constructs new instance and loads all RGB patterns and gradients
      */
     public RGBUtils() {
-        formats = new RGBFormatter[] {
-                new BukkitFormat(),
-                new CMIFormat(),
-                new UnnamedFormat1(),
-                new HtmlFormat()
-        };
+        List<RGBFormatter> list = new ArrayList<>();
+        list.add(new BukkitFormat());
+        list.add(new CMIFormat());
+        list.add(new UnnamedFormat1());
+        list.add(new HtmlFormat());
+        list.add(new KyoriFormat());
+        try {
+            Class.forName("net.kyori.adventure.text.minimessage.MiniMessage");
+            list.add(new MiniMessageFormat());
+        } catch (ClassNotFoundException ignored) {}
+        formats = list.toArray(new RGBFormatter[0]);
+
         gradients = new GradientPattern[] {
                 //{#RRGGBB>}text{#RRGGBB<}
                 new CMIGradient(),
@@ -72,21 +76,16 @@ public class RGBUtils {
 
     /**
      * Applies all RGB formats and gradients to text and returns it.
-     * This method is called on every property initialization to convert formats
-     * once instead of on every refresh, if possible. Because of that, parameter
-     * {@code ignorePlaceholders} exists to not break raw placeholder identifiers
      *
      * @param   text
      *          original text
-     * @param   ignorePlaceholders
-     *          whether placeholders should be ignored or not
      * @return  text where everything is converted to #RRGGBB
      */
-    public String applyFormats(String text, boolean ignorePlaceholders) {
+    public String applyFormats(String text) {
         Preconditions.checkNotNull(text, "text");
         String replaced = text;
         for (GradientPattern pattern : gradients) {
-            replaced = pattern.applyPattern(replaced, ignorePlaceholders);
+            replaced = pattern.applyPattern(replaced, false);
         }
         for (RGBFormatter formatter : formats) {
             replaced = formatter.reformat(replaced);
@@ -94,6 +93,23 @@ public class RGBUtils {
         return replaced;
     }
 
+    /**
+     * Applies all gradient formats to text and returns it. This only affects
+     * usage where no placeholder is used inside.
+     *
+     * @param   text
+     *          original text
+     * @return  text where all gradients with static text are converted to #RRGGBB
+     */
+    public String applyCleanGradients(String text) {
+        Preconditions.checkNotNull(text, "text");
+        String replaced = text;
+        for (GradientPattern pattern : gradients) {
+            replaced = pattern.applyPattern(replaced, true);
+        }
+        return replaced;
+    }
+
     /**
      * Converts TAB's RGB format (#RRGGBB) into bukkit one
      * (&amp;x&amp;r&amp;r&amp;g&amp;g&amp;b&amp;b) for modern
@@ -110,7 +126,7 @@ public class RGBUtils {
         if (!text.contains("#")) return text; //no rgb codes
         if (rgbClient) {
             //converting random formats to TAB one
-            String replaced = applyFormats(text, false);
+            String replaced = applyFormats(text);
             for (Pattern p : new Pattern[]{tabPatternLegacy, tabPattern}) {
                 Matcher m = p.matcher(replaced);
                 while (m.find()) {
@@ -135,7 +151,7 @@ public class RGBUtils {
     public String convertRGBtoLegacy(String text) {
         if (text == null) return null;
         if (!text.contains("#")) return EnumChatFormat.color(text);
-        String applied = applyFormats(text, false);
+        String applied = applyFormats(text);
         StringBuilder sb = new StringBuilder();
         for (int i = 0; i < applied.length(); i++){
             char c = applied.charAt(i);

api/src/main/java/me/neznamy/tab/api/chat/rgb/format/KyoriFormat.java

@@ -0,0 +1,25 @@
+package me.neznamy.tab.api.chat.rgb.format;
+
+import java.util.regex.Matcher;
+import java.util.regex.Pattern;
+
+/**
+ * Formatter for <#RRGGBB>
+ */
+public class KyoriFormat implements RGBFormatter {
+
+    private final Pattern pattern = Pattern.compile("<#[0-9a-fA-F]{6}>");
+
+    @Override
+    public String reformat(String text) {
+        if (!text.contains("<#")) return text;
+        String replaced = text;
+        Matcher m = pattern.matcher(replaced);
+        while (m.find()) {
+            String hexCode = m.group();
+            String fixed = hexCode.substring(2, 8);
+            replaced = replaced.replace(hexCode, "#" + fixed);
+        }
+        return replaced;
+    }
+}

api/src/main/java/me/neznamy/tab/api/chat/rgb/format/MiniMessageFormat.java

@@ -0,0 +1,22 @@
+package me.neznamy.tab.api.chat.rgb.format;
+
+import me.neznamy.tab.api.chat.EnumChatFormat;
+import net.kyori.adventure.text.minimessage.MiniMessage;
+import net.kyori.adventure.text.serializer.legacy.LegacyComponentSerializer;
+
+/**
+ * Formatter for <#RRGGBB>
+ */
+public class MiniMessageFormat implements RGBFormatter {
+
+    @Override
+    public String reformat(String text) {
+        if (!text.contains("<")) return text;
+        String format = text.replace(EnumChatFormat.RESET.getFormat(), ""); //remove &r from header/footer newline inserts
+        try {
+            return LegacyComponentSerializer.legacySection().serialize(MiniMessage.miniMessage().deserialize(format));
+        } catch (Exception ignored) {
+            return text;
+        }
+    }
+}

api/src/main/java/me/neznamy/tab/api/config/ConfigurationFile.java

@@ -224,7 +224,7 @@ public abstract class ConfigurationFile {
         }
         List<String> fixedList = new ArrayList<>();
         for (Object key : (List<Object>)value) {
-            fixedList.add(key.toString());
+            fixedList.add(String.valueOf(key));
         }
         return fixedList;
     }

api/src/main/java/me/neznamy/tab/api/placeholder/Placeholder.java

@@ -6,11 +6,9 @@ public interface Placeholder {
 
     String getIdentifier();
 
-    boolean isTriggerMode();
-
-    void enableTriggerMode();
-
     void enableTriggerMode(Runnable onActivation, Runnable onDisable);
 
     void unload();
+
+    boolean isUsed();
 }

api/src/main/java/me/neznamy/tab/api/placeholder/PlaceholderManager.java

@@ -48,4 +48,6 @@ public interface PlaceholderManager {
     String findReplacement(String placeholder, String output);
 
     List<String> getUsedPlaceholders();
+
+    Placeholder getPlaceholder(String identifier);
 }

api/src/main/java/me/neznamy/tab/api/task/ThreadManager.java

@@ -49,10 +49,20 @@ public interface ThreadManager {
      *          usage type to add cpu usage to
      * @param   task
      *          the task
+     * @return  Future representing the submitted task
      */
-    RepeatingTask startRepeatingMeasuredTask(int intervalMilliseconds, TabFeature feature, String type, Runnable task);
+    Future<?> startRepeatingMeasuredTask(int intervalMilliseconds, TabFeature feature, String type, Runnable task);
 
-    RepeatingTask startRepeatingTask(int intervalMilliseconds, Runnable task);
+    /**
+     * Starts a new task with defined repeat interval
+     *
+     * @param   intervalMilliseconds
+     *          task interval
+     * @param   task
+     *          the task
+     * @return  Future representing the submitted task
+     */
+    Future<?> startRepeatingTask(int intervalMilliseconds, Runnable task);
 
     /**
      * Runs task with a delay and measures how long it took to process
@@ -65,9 +75,18 @@ public interface ThreadManager {
      *          usage type to add cpu usage to
      * @param   task
      *          the task
-     * @return  future allowing to cancel the task
+     * @return  Future representing the submitted task
      */
     Future<?> runTaskLater(int delayMilliseconds, TabFeature feature, String type, Runnable task);
 
+    /**
+     * Runs task with a delay
+     *
+     * @param   delayMilliseconds
+     *          how long to run the task after
+     * @param   task
+     *          the task
+     * @return  Future representing the submitted task
+     */
     Future<?> runTaskLater(int delayMilliseconds, Runnable task);
 }

api/src/main/java/me/neznamy/tab/api/util/Preconditions.java

@@ -1,5 +1,7 @@
 package me.neznamy.tab.api.util;
 
+import me.neznamy.tab.api.TabPlayer;
+
 public class Preconditions {
 
     private Preconditions(){}
@@ -17,4 +19,8 @@ public class Preconditions {
         if (number.doubleValue() < min.doubleValue() || number.doubleValue() > max.doubleValue())
             throw new IllegalArgumentException(variable + " index out of range (" + min + " - " + max + ")");
     }
+
+    public static void checkLoaded(TabPlayer player) {
+        if (!player.isLoaded()) throw new IllegalStateException("Player is not loaded yet. Try again later.");
+    }
 }

build-logic/src/main/kotlin/tab.base-conventions.gradle.kts

@@ -13,6 +13,8 @@ tasks {
         ))
     }
     javadoc {
+        // This saves a decent bit of processing power on slow machines
+        enabled = false
         options.encoding = Charsets.UTF_8.name()
         (options as StandardJavadocDocletOptions).addStringOption("Xdoclint:none", "-quiet")
     }

bukkit/build.gradle.kts

@@ -6,6 +6,7 @@ dependencies {
     compileOnly(libs.vault)
     compileOnly(libs.via)
     compileOnly(libs.authlib)
-    compileOnly(libs.libsDisguises)
-    compileOnly(libs.essentials)
+    compileOnly(libs.essentials) {
+        exclude("org.spigotmc", "spigot-api")
+    }
 }

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

@@ -1,5 +1,6 @@
 package me.neznamy.tab.platforms.bukkit;
 
+import me.neznamy.tab.api.TabAPI;
 import org.bukkit.event.EventHandler;
 import org.bukkit.event.EventPriority;
 import org.bukkit.event.Listener;
@@ -8,15 +9,20 @@ import org.bukkit.event.player.PlayerCommandPreprocessEvent;
 import org.bukkit.event.player.PlayerJoinEvent;
 import org.bukkit.event.player.PlayerQuitEvent;
 
-import me.neznamy.tab.shared.TAB;
-
 /**
  * The core for bukkit forwarding events into all enabled features
  */
 public class BukkitEventListener implements Listener {
 
+    /** Platform instance */
     private final BukkitPlatform platform;
-    
+
+    /**
+     * Constructs new instance with given parameter
+     *
+     * @param   platform
+     *          Platform instance
+     */
     public BukkitEventListener(BukkitPlatform platform) {
         this.platform = platform;
     }
@@ -29,8 +35,8 @@ public class BukkitEventListener implements Listener {
      */
     @EventHandler(priority = EventPriority.HIGHEST)
     public void onQuit(PlayerQuitEvent e){
-        if (TAB.getInstance().isDisabled()) return;
-        TAB.getInstance().getCPUManager().runTask(() -> TAB.getInstance().getFeatureManager().onQuit(TAB.getInstance().getPlayer(e.getPlayer().getUniqueId())));
+        if (TabAPI.getInstance().isPluginDisabled()) return;
+        TabAPI.getInstance().getThreadManager().runTask(() -> TabAPI.getInstance().getFeatureManager().onQuit(TabAPI.getInstance().getPlayer(e.getPlayer().getUniqueId())));
     }
     
     /**
@@ -41,8 +47,8 @@ public class BukkitEventListener implements Listener {
      */
     @EventHandler(priority = EventPriority.LOWEST)
     public void onJoin(PlayerJoinEvent e) {
-        if (TAB.getInstance().isDisabled()) return;
-        TAB.getInstance().getCPUManager().runTask(() -> TAB.getInstance().getFeatureManager().onJoin(new BukkitTabPlayer(e.getPlayer(), platform.getProtocolVersion(e.getPlayer()))));
+        if (TabAPI.getInstance().isPluginDisabled()) return;
+        TabAPI.getInstance().getThreadManager().runTask(() -> TabAPI.getInstance().getFeatureManager().onJoin(new BukkitTabPlayer(e.getPlayer(), platform.getProtocolVersion(e.getPlayer()))));
     }
 
     /**
@@ -53,8 +59,8 @@ public class BukkitEventListener implements Listener {
      */
     @EventHandler(priority = EventPriority.LOWEST)
     public void onWorldChange(PlayerChangedWorldEvent e){
-        if (TAB.getInstance().isDisabled()) return;
-        TAB.getInstance().getCPUManager().runTask(() -> TAB.getInstance().getFeatureManager().onWorldChange(e.getPlayer().getUniqueId(), e.getPlayer().getWorld().getName()));
+        if (TabAPI.getInstance().isPluginDisabled()) return;
+        TabAPI.getInstance().getThreadManager().runTask(() -> TabAPI.getInstance().getFeatureManager().onWorldChange(e.getPlayer().getUniqueId(), e.getPlayer().getWorld().getName()));
     }
 
     /**
@@ -65,7 +71,7 @@ public class BukkitEventListener implements Listener {
      */
     @EventHandler
     public void onCommand(PlayerCommandPreprocessEvent e) {
-        if (TAB.getInstance().isDisabled()) return;
-        if (TAB.getInstance().getFeatureManager().onCommand(TAB.getInstance().getPlayer(e.getPlayer().getUniqueId()), e.getMessage())) e.setCancelled(true);
+        if (TabAPI.getInstance().isPluginDisabled()) return;
+        if (TabAPI.getInstance().getFeatureManager().onCommand(TabAPI.getInstance().getPlayer(e.getPlayer().getUniqueId()), e.getMessage())) e.setCancelled(true);
     }
 }

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

@@ -1,82 +1,54 @@
 package me.neznamy.tab.platforms.bukkit;
 
-import java.lang.reflect.Array;
-import java.util.ArrayList;
-import java.util.Collection;
-import java.util.EnumMap;
-import java.util.HashMap;
-import java.util.List;
-import java.util.Locale;
-import java.util.Map;
-import java.util.UUID;
-
-import com.mojang.authlib.properties.Property;
-import me.neznamy.tab.api.protocol.*;
-import org.bukkit.Bukkit;
-import org.bukkit.Location;
-import org.bukkit.entity.EntityType;
-
-import com.google.gson.JsonObject;
 import com.mojang.authlib.GameProfile;
-
+import com.mojang.authlib.properties.Property;
 import me.neznamy.tab.api.ProtocolVersion;
-import me.neznamy.tab.api.chat.ChatClickable.EnumClickAction;
-import me.neznamy.tab.api.chat.ChatComponentEntity;
-import me.neznamy.tab.api.chat.ChatHoverable.EnumHoverAction;
+import me.neznamy.tab.api.TabAPI;
 import me.neznamy.tab.api.chat.EnumChatFormat;
 import me.neznamy.tab.api.chat.IChatBaseComponent;
-import me.neznamy.tab.api.chat.TextColor;
+import me.neznamy.tab.api.chat.WrappedChatComponent;
+import me.neznamy.tab.api.protocol.*;
 import me.neznamy.tab.api.protocol.PacketPlayOutBoss.Action;
 import me.neznamy.tab.api.protocol.PacketPlayOutPlayerInfo.EnumGamemode;
 import me.neznamy.tab.api.protocol.PacketPlayOutPlayerInfo.EnumPlayerInfoAction;
 import me.neznamy.tab.api.protocol.PacketPlayOutPlayerInfo.PlayerInfoData;
-import me.neznamy.tab.platforms.bukkit.nms.NMSStorage;
-import me.neznamy.tab.platforms.bukkit.nms.PacketPlayOutEntityDestroy;
-import me.neznamy.tab.platforms.bukkit.nms.PacketPlayOutEntityMetadata;
-import me.neznamy.tab.platforms.bukkit.nms.PacketPlayOutEntityTeleport;
-import me.neznamy.tab.platforms.bukkit.nms.PacketPlayOutSpawnEntityLiving;
+import me.neznamy.tab.platforms.bukkit.nms.*;
 import me.neznamy.tab.platforms.bukkit.nms.datawatcher.DataWatcher;
+import org.bukkit.Location;
+import org.bukkit.entity.EntityType;
+
+import java.lang.reflect.Array;
+import java.util.*;
 
 @SuppressWarnings({"unchecked", "rawtypes"})
 public class BukkitPacketBuilder extends PacketBuilder {
 
-    //nms storage
+    /** NMS data storage */
     private final NMSStorage nms = NMSStorage.getInstance();
 
-    //entity type ids
+    /** Map of entity type ids for entities used by the plugin */
     private final EnumMap<EntityType, Integer> entityIds = new EnumMap<>(EntityType.class);
 
+    /** Component cache for better performance (1.16+ players) */
     private final Map<IChatBaseComponent, Object> componentCacheModern = new HashMap<>();
-    private final Map<IChatBaseComponent, Object> componentCacheLegacy = new HashMap<>();
 
-    private Object emptyScoreboard;
-    private Object dummyEntity;
+    /** Component cache for better performance (1.15- players) */
+    private final Map<IChatBaseComponent, Object> componentCacheLegacy = new HashMap<>();
 
     /**
      * Constructs new instance
      */
     public BukkitPacketBuilder() {
-        if (nms.getMinorVersion() >= 13) {
+        if (nms.getMinorVersion() >= 19) {
+            entityIds.put(EntityType.ARMOR_STAND, 2);
+        } else if (nms.getMinorVersion() >= 13) {
             entityIds.put(EntityType.ARMOR_STAND, 1);
-            entityIds.put(EntityType.WITHER, 83);
         } else {
             entityIds.put(EntityType.WITHER, 64);
             if (nms.getMinorVersion() >= 8){
                 entityIds.put(EntityType.ARMOR_STAND, 30);
             }
         }
-        try {
-            emptyScoreboard = nms.newScoreboard.newInstance();
-        } catch (ReflectiveOperationException e) {
-            Bukkit.getConsoleSender().sendMessage(EnumChatFormat.color("&c[TAB] Failed to create instance of \"Scoreboard\""));
-        }
-        if (nms.getMinorVersion() >= 8) {
-            try {
-                dummyEntity = nms.newEntityArmorStand.newInstance(nms.World_getHandle.invoke(Bukkit.getWorlds().get(0)), 0, 0, 0);
-            } catch (ReflectiveOperationException e) {
-                Bukkit.getConsoleSender().sendMessage(EnumChatFormat.color("&c[TAB] Failed to create instance of \"EntityArmorStand\""));
-            }
-        }
         buildMap.put(PacketPlayOutEntityMetadata.class, (packet, version) -> build((PacketPlayOutEntityMetadata)packet));
         buildMap.put(PacketPlayOutEntityTeleport.class, (packet, version) -> build((PacketPlayOutEntityTeleport)packet));
         buildMap.put(PacketPlayOutEntityDestroy.class, (packet, version) -> build((PacketPlayOutEntityDestroy)packet));
@@ -96,19 +68,22 @@ public class BukkitPacketBuilder extends PacketBuilder {
     @Override
     public Object build(PacketPlayOutChat packet, ProtocolVersion clientVersion) throws ReflectiveOperationException {
         Object component = toNMSComponent(packet.getMessage(), clientVersion);
-        if (nms.getMinorVersion() >= 16) {
+        if (nms.getMinorVersion() >= 19)
+            try {
+                return nms.newPacketPlayOutChat.newInstance(component, packet.getType() == PacketPlayOutChat.ChatMessageType.GAME_INFO);
+            } catch (Exception e) {
+                //1.19.0
+                return nms.newPacketPlayOutChat.newInstance(component, packet.getType().ordinal());
+            }
+        if (nms.getMinorVersion() >= 16)
             return nms.newPacketPlayOutChat.newInstance(component, nms.ChatMessageType_values[packet.getType().ordinal()], UUID.randomUUID());
-        }
-        if (nms.getMinorVersion() >= 12) {
+        if (nms.getMinorVersion() >= 12)
             return nms.newPacketPlayOutChat.newInstance(component, Enum.valueOf((Class<Enum>) nms.ChatMessageType, packet.getType().toString()));
-        }
-        if (nms.getMinorVersion() >= 8) {
+        if (nms.getMinorVersion() >= 8)
             return nms.newPacketPlayOutChat.newInstance(component, (byte) packet.getType().ordinal());
-        }
-        if (nms.getMinorVersion() == 7) {
+        if (nms.getMinorVersion() == 7)
             return nms.newPacketPlayOutChat.newInstance(component);
-        }
-        throw new IllegalStateException("Not supported on <1.7");
+        return packet;
     }
 
     @Override
@@ -120,13 +95,14 @@ public class BukkitPacketBuilder extends PacketBuilder {
             GameProfile profile = new GameProfile(data.getUniqueId(), data.getName());
             if (data.getSkin() != null) profile.getProperties().put("textures", new Property("textures", data.getSkin().getValue(), data.getSkin().getSignature()));
             List<Object> parameters = new ArrayList<>();
-            if (nms.newPlayerInfoData.getParameterCount() == 5) {
+            if (nms.newPlayerInfoData.getParameterTypes()[0] == nms.PacketPlayOutPlayerInfo) {
                 parameters.add(nmsPacket);
             }
             parameters.add(profile);
             parameters.add(data.getLatency());
             parameters.add(data.getGameMode() == null ? null : nms.EnumGamemode_values[nms.EnumGamemode_values.length-EnumGamemode.VALUES.length+data.getGameMode().ordinal()]); //not_set was removed in 1.17
             parameters.add(data.getDisplayName() == null ? null : toNMSComponent(data.getDisplayName(), clientVersion));
+            if (nms.getMinorVersion() >= 19) parameters.add(null);
             items.add(nms.newPlayerInfoData.newInstance(parameters.toArray()));
         }
         nms.setField(nmsPacket, nms.PacketPlayOutPlayerInfo_PLAYERS, items);
@@ -178,7 +154,7 @@ public class BukkitPacketBuilder extends PacketBuilder {
         if (packet.getAction() == PacketPlayOutScoreboardScore.Action.REMOVE) {
             return nms.newPacketPlayOutScoreboardScore_String.newInstance(packet.getPlayer());
         }
-        Object score = nms.newScoreboardScore.newInstance(emptyScoreboard, newScoreboardObjective(packet.getObjectiveName()), packet.getPlayer());
+        Object score = nms.newScoreboardScore.newInstance(nms.emptyScoreboard, newScoreboardObjective(packet.getObjectiveName()), packet.getPlayer());
         nms.ScoreboardScore_setScore.invoke(score, packet.getScore());
         if (nms.getMinorVersion() >= 8) {
             return nms.newPacketPlayOutScoreboardScore.newInstance(score);
@@ -189,7 +165,7 @@ public class BukkitPacketBuilder extends PacketBuilder {
     @Override
     public Object build(PacketPlayOutScoreboardTeam packet, ProtocolVersion clientVersion) throws ReflectiveOperationException {
         if (nms.PacketPlayOutScoreboardTeam == null) return null; //fabric
-        Object team = nms.newScoreboardTeam.newInstance(emptyScoreboard, packet.getName());
+        Object team = nms.newScoreboardTeam.newInstance(nms.emptyScoreboard, packet.getName());
         String prefix = packet.getPlayerPrefix();
         String suffix = packet.getPlayerSuffix();
         if (clientVersion.getMinorVersion() < 13) {
@@ -224,9 +200,11 @@ public class BukkitPacketBuilder extends PacketBuilder {
     }
 
     /**
-     * Builds entity destroy packet with given parameter
+     * Builds entity destroy packet from custom packet class
      *
-     * @return  destroy packet
+     * @param   packet
+     *          Destroy packet
+     * @return  NMS destroy packet
      * @throws  ReflectiveOperationException
      *          if thrown by reflective operation
      */
@@ -239,26 +217,36 @@ public class BukkitPacketBuilder extends PacketBuilder {
         }
     }
 
+    /**
+     * Builds entity metadata packet from custom packet class
+     *
+     * @param   packet
+     *          Metadata packet
+     * @return  NMS metadata packet
+     * @throws  ReflectiveOperationException
+     *          if thrown by reflective operation
+     */
     public Object build(PacketPlayOutEntityMetadata packet) throws ReflectiveOperationException {
         return nms.newPacketPlayOutEntityMetadata.newInstance(packet.getEntityId(), packet.getDataWatcher().toNMS(), true);
     }
 
     /**
-     * Builds entity spawn packet with given parameters
+     * Builds entity spawn packet from custom packet class
      *
-     * @return  entity spawn packet
+     * @param   packet
+     *          Spawn packet
+     * @return  NMS spawn packet
      * @throws  ReflectiveOperationException
      *          if thrown by reflective operation
      */
     public Object build(PacketPlayOutSpawnEntityLiving packet) throws ReflectiveOperationException {
         Object nmsPacket;
         if (nms.getMinorVersion() >= 17) {
-            nmsPacket = nms.newPacketPlayOutSpawnEntityLiving.newInstance(dummyEntity);
+            nmsPacket = nms.newPacketPlayOutSpawnEntityLiving.newInstance(nms.dummyEntity);
         } else {
             nmsPacket = nms.newPacketPlayOutSpawnEntityLiving.newInstance();
         }
         nms.setField(nmsPacket, nms.PacketPlayOutSpawnEntityLiving_ENTITYID, packet.getEntityId());
-        nms.setField(nmsPacket, nms.PacketPlayOutSpawnEntityLiving_ENTITYTYPE, entityIds.get(packet.getEntityType()));
         nms.setField(nmsPacket, nms.PacketPlayOutSpawnEntityLiving_YAW, (byte)(packet.getLocation().getYaw() * 256.0f / 360.0f));
         nms.setField(nmsPacket, nms.PacketPlayOutSpawnEntityLiving_PITCH, (byte)(packet.getLocation().getPitch() * 256.0f / 360.0f));
         if (nms.getMinorVersion() <= 14) {
@@ -274,20 +262,28 @@ public class BukkitPacketBuilder extends PacketBuilder {
             nms.setField(nmsPacket, nms.PacketPlayOutSpawnEntityLiving_Y, floor(packet.getLocation().getY()*32));
             nms.setField(nmsPacket, nms.PacketPlayOutSpawnEntityLiving_Z, floor(packet.getLocation().getZ()*32));
         }
+        int id = entityIds.get(packet.getEntityType());
+        if (nms.getMinorVersion() >= 19) {
+            nms.setField(nmsPacket, nms.PacketPlayOutSpawnEntityLiving_ENTITYTYPE, nms.Registry_a.invoke(nms.IRegistry_X, id));
+        } else {
+            nms.setField(nmsPacket, nms.PacketPlayOutSpawnEntityLiving_ENTITYTYPE, id);
+        }
         return nmsPacket;
     }
 
     /**
-     * Builds entity teleport packet with given parameters
+     * Builds entity teleport packet from custom packet class
      *
-     * @return  entity teleport packet
+     * @param   packet
+     *          Teleport packet
+     * @return  NMS teleport packet
      * @throws  ReflectiveOperationException
      *          if thrown by reflective operation
      */
     public Object build(PacketPlayOutEntityTeleport packet) throws ReflectiveOperationException {
         Object nmsPacket;
         if (nms.getMinorVersion() >= 17) {
-            nmsPacket = nms.newPacketPlayOutEntityTeleport.newInstance(dummyEntity);
+            nmsPacket = nms.newPacketPlayOutEntityTeleport.newInstance(nms.dummyEntity);
         } else {
             nmsPacket = nms.newPacketPlayOutEntityTeleport.newInstance();
         }
@@ -305,7 +301,23 @@ public class BukkitPacketBuilder extends PacketBuilder {
         nms.setField(nmsPacket, nms.PacketPlayOutEntityTeleport_PITCH, (byte) (packet.getLocation().getPitch()/360*256));
         return nmsPacket;
     }
-    
+
+    /**
+     * Writes data into NMS team from custom team packet. Used on 1.13+ servers.
+     *
+     * @param   packet
+     *          Packet to read from
+     * @param   clientVersion
+     *          Version of player
+     * @param   team
+     *          Team to write to
+     * @param   prefix
+     *          Prefix to use
+     * @param   suffix
+     *          Suffix to use
+     * @throws  ReflectiveOperationException
+     *          if thrown by reflective operation
+     */
     private void createTeamModern(PacketPlayOutScoreboardTeam packet, ProtocolVersion clientVersion, Object team, String prefix, String suffix) throws ReflectiveOperationException {
         if (prefix != null) nms.ScoreboardTeam_setPrefix.invoke(team, toNMSComponent(IChatBaseComponent.optimizedComponent(prefix), clientVersion));
         if (suffix != null) nms.ScoreboardTeam_setSuffix.invoke(team, toNMSComponent(IChatBaseComponent.optimizedComponent(suffix), clientVersion));
@@ -315,6 +327,20 @@ public class BukkitPacketBuilder extends PacketBuilder {
         nms.ScoreboardTeam_setCollisionRule.invoke(team, String.valueOf(packet.getCollisionRule()).equals("always") ? nms.EnumTeamPush_values[0] : nms.EnumTeamPush_values[1]);
     }
 
+    /**
+     * Writes data into NMS team from custom team packet. Used on 1.12- servers.
+     *
+     * @param   packet
+     *          Packet to read from
+     * @param   team
+     *          Team to write to
+     * @param   prefix
+     *          Prefix to use
+     * @param   suffix
+     *          Suffix to use
+     * @throws  ReflectiveOperationException
+     *          if thrown by reflective operation
+     */
     private void createTeamLegacy(PacketPlayOutScoreboardTeam packet, Object team, String prefix, String suffix) throws ReflectiveOperationException {
         if (prefix != null) nms.ScoreboardTeam_setPrefix.invoke(team, prefix);
         if (suffix != null) nms.ScoreboardTeam_setSuffix.invoke(team, suffix);
@@ -332,10 +358,10 @@ public class BukkitPacketBuilder extends PacketBuilder {
             EnumGamemode gameMode = (nmsGameMode == null) ? null : EnumGamemode.valueOf(nmsGameMode.toString());
             GameProfile profile = (GameProfile) nms.PlayerInfoData_getProfile.invoke(nmsData);
             Object nmsComponent = nms.PlayerInfoData_getDisplayName.invoke(nmsData);
-            IChatBaseComponent listName = nmsComponent == null ? null : fromNMSComponent(nmsComponent);
+            IChatBaseComponent listName = nmsComponent == null ? null : new WrappedChatComponent(nmsComponent);
             Skin skin = null;
             if (!profile.getProperties().get("textures").isEmpty()) {
-                Property pr = (Property) profile.getProperties().get("textures").iterator().next();
+                Property pr = profile.getProperties().get("textures").iterator().next();
                 skin = new Skin(pr.getValue(), pr.getSignature());
             }
             listData.add(new PlayerInfoData(profile.getName(), profile.getId(), skin,
@@ -389,6 +415,7 @@ public class BukkitPacketBuilder extends PacketBuilder {
         }
         if (packet.getAction() == Action.ADD) {
             w.helper().setEntityFlags((byte) 32);
+            w.helper().setWitherInvulnerableTime(880); // Magic number
             return build(new PacketPlayOutSpawnEntityLiving(entityId, new UUID(0, 0), EntityType.WITHER, new Location(null, 0,0,0), w));
         } else {
             return build(new PacketPlayOutEntityMetadata(entityId, w));
@@ -408,69 +435,7 @@ public class BukkitPacketBuilder extends PacketBuilder {
     }
 
     /**
-     * Converts minecraft IChatBaseComponent into TAB's component class. Currently, does not support show_item hover event on 1.16+.
-     *
-     * @param   component
-     *          component to convert
-     * @return  converted component
-     * @throws  ReflectiveOperationException
-     *          if thrown by reflective operation
-     */
-    private IChatBaseComponent fromNMSComponent(Object component) throws ReflectiveOperationException {
-        if (!nms.ChatComponentText.isInstance(component)) return null; //paper
-        IChatBaseComponent chat = new IChatBaseComponent((String) nms.ChatComponentText_text.get(component));
-        Object modifier = nms.ChatBaseComponent_modifier.get(component);
-        if (modifier != null) {
-            chat.getModifier().setColor(fromNMSColor(nms.ChatModifier_color.get(modifier)));
-            chat.getModifier().setBold((Boolean) nms.ChatModifier_bold.get(modifier));
-            chat.getModifier().setItalic((Boolean) nms.ChatModifier_italic.get(modifier));
-            chat.getModifier().setObfuscated((Boolean) nms.ChatModifier_obfuscated.get(modifier));
-            chat.getModifier().setStrikethrough((Boolean) nms.ChatModifier_strikethrough.get(modifier));
-            chat.getModifier().setUnderlined((Boolean) nms.ChatModifier_underlined.get(modifier));
-            Object clickEvent = nms.ChatModifier_clickEvent.get(modifier);
-            if (clickEvent != null) {
-                chat.getModifier().onClick(EnumClickAction.valueOf(nms.ChatClickable_action.get(clickEvent).toString().toUpperCase()), (String) nms.ChatClickable_value.get(clickEvent));
-            }
-            Object hoverEvent = nms.ChatModifier_hoverEvent.get(modifier);
-            if (hoverEvent != null) {
-                EnumHoverAction action;
-                IChatBaseComponent value;
-                if (nms.getMinorVersion() >= 16) {
-                    //does not support show_item on 1.16+
-                    JsonObject json = (JsonObject) nms.ChatHoverable_serialize.invoke(hoverEvent);
-                    action = EnumHoverAction.valueOf(json.get("action").getAsString().toUpperCase());
-                    value = IChatBaseComponent.deserialize(json.get("contents").getAsJsonObject().toString());
-                } else {
-                    action = EnumHoverAction.valueOf(nms.ChatHoverable_getAction.invoke(hoverEvent).toString().toUpperCase());
-                    value = fromNMSComponent(nms.ChatHoverable_getValue.invoke(hoverEvent));
-                }
-                chat.getModifier().onHover(action, value);
-            }
-        }
-        for (Object extra : (List<Object>) nms.ChatBaseComponent_extra.get(component)) {
-            chat.addExtra(fromNMSComponent(extra));
-        }
-        return chat;
-    }
-
-    private TextColor fromNMSColor(Object color) throws ReflectiveOperationException {
-        if (color == null) return null;
-        if (nms.getMinorVersion() >= 16) {
-            String name = (String) nms.ChatHexColor_name.get(color);
-            if (name != null) {
-                //legacy code
-                return new TextColor(EnumChatFormat.valueOf(name.toUpperCase(Locale.US)));
-            } else {
-                int rgb = (int) nms.ChatHexColor_rgb.get(color);
-                return new TextColor((rgb >> 16) & 0xFF, (rgb >> 8) & 0xFF, rgb & 0xFF);
-            }
-        } else {
-            return new TextColor(EnumChatFormat.valueOf(((Enum)color).name()));
-        }
-    }
-
-    /**
-     * Converts TAB's IChatBaseComponent into minecraft's component. Currently, does not support hover event.
+     * Converts TAB's IChatBaseComponent into minecraft's component.
      *
      * @param   component
      *          component to convert
@@ -481,86 +446,28 @@ public class BukkitPacketBuilder extends PacketBuilder {
      *          if thrown by reflective operation
      */
     public Object toNMSComponent(IChatBaseComponent component, ProtocolVersion clientVersion) throws ReflectiveOperationException {
-        Object obj;
-        if (clientVersion.getMinorVersion() >= 16) {
-            if (componentCacheModern.containsKey(component)) return componentCacheModern.get(component);
-            obj = toNMSComponent0(component, clientVersion);
-            if (componentCacheModern.size() > 10000) componentCacheModern.clear();
-            componentCacheModern.put(component, obj);
-        } else {
-            if (componentCacheLegacy.containsKey(component)) return componentCacheLegacy.get(component);
-            obj = toNMSComponent0(component, clientVersion);
-            if (componentCacheLegacy.size() > 10000) componentCacheLegacy.clear();
-            componentCacheLegacy.put(component, obj);
-        }
-        return obj;
-    }
-
-    //separate method to prevent extras counting cpu again due to recursion and finally showing higher usage than real
-    private Object toNMSComponent0(IChatBaseComponent component, ProtocolVersion clientVersion) throws ReflectiveOperationException {
         if (component == null) return null;
-        Object chat = nms.newChatComponentText.newInstance(component.getText());
-        Object modifier;
-        Object clickEvent = component.getModifier().getClickEvent() == null ? null : nms.newChatClickable.newInstance(Enum.valueOf((Class<Enum>) nms.EnumClickAction, 
-                component.getModifier().getClickEvent().getAction().toString().toUpperCase()), component.getModifier().getClickEvent().getValue());
-        if (nms.getMinorVersion() >= 16) {
-            Object color = null;
-            if (component.getModifier().getColor() != null) {
-                if (clientVersion.getMinorVersion() >= 16) {
-                    color = nms.ChatHexColor_ofInt.invoke(null, (component.getModifier().getColor().getRed() << 16) + (component.getModifier().getColor().getGreen() << 8) + component.getModifier().getColor().getBlue());
-                } else {
-                    color = nms.ChatHexColor_ofString.invoke(null, component.getModifier().getColor().getLegacyColor().toString().toLowerCase());
-                }
-            }
-            Object hoverEvent = null;
-            if (component.getModifier().getHoverEvent() != null) {
-                Object nmsAction = nms.EnumHoverAction_a.invoke(null, component.getModifier().getHoverEvent().getAction().toString().toLowerCase());
-                switch (component.getModifier().getHoverEvent().getAction()) {
-                case SHOW_TEXT:
-                    hoverEvent = nms.newChatHoverable.newInstance(nmsAction, toNMSComponent0(component.getModifier().getHoverEvent().getValue(), clientVersion));
-                    break;
-                case SHOW_ENTITY:
-                    hoverEvent = nms.EnumHoverAction_fromJson.invoke(nmsAction, ((ChatComponentEntity) component.getModifier().getHoverEvent().getValue()).toJson());
-                    break;
-                case SHOW_ITEM:
-                    hoverEvent = nms.EnumHoverAction_fromLegacyComponent.invoke(nmsAction, toNMSComponent0(component.getModifier().getHoverEvent().getValue(), clientVersion));
-                    break;
-                default:
-                    break;
-                }
-            }
-            modifier = nms.newChatModifier.newInstance(
-                    color,
-                    component.getModifier().getBold(),
-                    component.getModifier().getItalic(),
-                    component.getModifier().getUnderlined(),
-                    component.getModifier().getStrikethrough(),
-                    component.getModifier().getObfuscated(),
-                    clickEvent, hoverEvent, null, null);
-        } else {
-            modifier = nms.newChatModifier.newInstance();
-            if (component.getModifier().getColor() != null) nms.setField(modifier, nms.ChatModifier_color, Enum.valueOf((Class<Enum>) nms.EnumChatFormat, component.getModifier().getColor().getLegacyColor().toString()));
-            nms.setField(modifier, nms.ChatModifier_bold, component.getModifier().getBold());
-            nms.setField(modifier, nms.ChatModifier_italic, component.getModifier().getItalic());
-            nms.setField(modifier, nms.ChatModifier_underlined, component.getModifier().getUnderlined());
-            nms.setField(modifier, nms.ChatModifier_strikethrough, component.getModifier().getStrikethrough());
-            nms.setField(modifier, nms.ChatModifier_obfuscated, component.getModifier().getObfuscated());
-            if (clickEvent != null) nms.setField(modifier, nms.ChatModifier_clickEvent, clickEvent);
-            if (component.getModifier().getHoverEvent() != null) {
-                nms.setField(modifier, nms.ChatModifier_hoverEvent, nms.newChatHoverable.newInstance(nms.EnumHoverAction_a.invoke(null, 
-                        component.getModifier().getHoverEvent().getAction().toString().toLowerCase()), toNMSComponent0(component.getModifier().getHoverEvent().getValue(), clientVersion)));
-            }
-        }
-        nms.setField(chat, nms.ChatBaseComponent_modifier, modifier);
-        for (IChatBaseComponent extra : component.getExtra()) {
-            nms.ChatComponentText_addSibling.invoke(chat, toNMSComponent0(extra, clientVersion));
-        }
+        if (component instanceof WrappedChatComponent) return ((WrappedChatComponent) component).get();
+        Map<IChatBaseComponent, Object> cache = clientVersion.getMinorVersion() >= 16 ? componentCacheModern : componentCacheLegacy;
+        if (cache.containsKey(component)) return cache.get(component);
+        if (cache.size() > 10000) cache.clear();
+        Object chat = nms.ChatSerializer_DESERIALIZE.invoke(null, component.toString(clientVersion));
+        cache.put(component, chat);
         return chat;
     }
 
+    /**
+     * Creates a new Scoreboard Objective with given name.
+     *
+     * @param   objectiveName
+     *          Objective name
+     * @return  NMS Objective
+     * @throws  ReflectiveOperationException
+     *          if thrown by reflective operation
+     */
     private Object newScoreboardObjective(String objectiveName) throws ReflectiveOperationException {
         if (nms.getMinorVersion() >= 13) {
-            return nms.newScoreboardObjective.newInstance(null, objectiveName, null, nms.newChatComponentText.newInstance(""), null);
+            return nms.newScoreboardObjective.newInstance(null, objectiveName, null, toNMSComponent(new IChatBaseComponent(""), TabAPI.getInstance().getServerVersion()), null);
         }
         return nms.newScoreboardObjective.newInstance(null, objectiveName, nms.IScoreboardCriteria_self.get(null));
     }

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

@@ -9,16 +9,18 @@ import io.netty.channel.ChannelHandlerContext;
 import io.netty.channel.ChannelPromise;
 import me.neznamy.tab.api.TabFeature;
 import me.neznamy.tab.api.TabPlayer;
-import me.neznamy.tab.api.util.Preconditions;
 import me.neznamy.tab.platforms.bukkit.nms.NMSStorage;
-import me.neznamy.tab.shared.TabConstants;
+import me.neznamy.tab.api.TabConstants;
 import me.neznamy.tab.shared.TAB;
 import me.neznamy.tab.shared.features.PipelineInjector;
 import org.jetbrains.annotations.NotNull;
 
+/**
+ * Pipeline injection for bukkit
+ */
 public class BukkitPipelineInjector extends PipelineInjector {
 
-    //nms storage
+    /** NMS data storage */
     private final NMSStorage nms = NMSStorage.getInstance();
 
     /**
@@ -38,7 +40,7 @@ public class BukkitPipelineInjector extends PipelineInjector {
      */
     public class BukkitChannelDuplexHandler extends ChannelDuplexHandler {
 
-        //injected player
+        /** Injected player */
         private final TabPlayer player;
 
         /**
@@ -48,7 +50,6 @@ public class BukkitPipelineInjector extends PipelineInjector {
          *          player to inject
          */
         public BukkitChannelDuplexHandler(TabPlayer player) {
-            Preconditions.checkNotNull(player, "player");
             this.player = player;
         }
 
@@ -70,7 +71,9 @@ public class BukkitPipelineInjector extends PipelineInjector {
                     return;
                 }
                 if (antiOverrideTeams && nms.PacketPlayOutScoreboardTeam != null && nms.PacketPlayOutScoreboardTeam.isInstance(packet)) {
+                    long time = System.nanoTime();
                     modifyPlayers(packet);
+                    TAB.getInstance().getCPUManager().addTime("NameTags", TabConstants.CpuUsageCategory.ANTI_OVERRIDE, System.nanoTime()-time);
                     super.write(context, packet, channelPromise);
                     return;
                 }
@@ -101,7 +104,8 @@ public class BukkitPipelineInjector extends PipelineInjector {
          */
         @SuppressWarnings("unchecked")
         private void modifyPlayers(Object packetPlayOutScoreboardTeam) throws ReflectiveOperationException {
-            long time = System.nanoTime();
+            int action = nms.PacketPlayOutScoreboardTeam_ACTION.getInt(packetPlayOutScoreboardTeam);
+            if (action == 1 || action == 2 || action == 4) return;
             Collection<String> players = (Collection<String>) nms.PacketPlayOutScoreboardTeam_PLAYERS.get(packetPlayOutScoreboardTeam);
             String teamName = (String) nms.PacketPlayOutScoreboardTeam_NAME.get(packetPlayOutScoreboardTeam);
             if (players == null) return;
@@ -121,9 +125,17 @@ public class BukkitPipelineInjector extends PipelineInjector {
                 }
             }
             nms.setField(packetPlayOutScoreboardTeam, nms.PacketPlayOutScoreboardTeam_PLAYERS, newList);
-            TAB.getInstance().getCPUManager().addTime("NameTags", TabConstants.CpuUsageCategory.ANTI_OVERRIDE, System.nanoTime()-time);
         }
 
+        /**
+         * Returns player with matching game profile name. This is different from
+         * real name when a nick plugin changing names of players is used. If no
+         * player was found, returns {@code null}.
+         *
+         * @param   name
+         *          Game profile name
+         * @return  Player with matching game profile name
+         */
         private TabPlayer getPlayer(String name) {
             for (TabPlayer p : TAB.getInstance().getOnlinePlayers()) {
                 if (p.getNickname().equals(name)) return p;

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

@@ -5,17 +5,25 @@ import java.lang.reflect.Method;
 import java.text.NumberFormat;
 import java.util.Locale;
 
+import me.neznamy.tab.api.TabConstants;
+import me.neznamy.tab.api.TabPlayer;
+import me.neznamy.tab.api.placeholder.PlayerPlaceholder;
+import me.neznamy.tab.shared.TAB;
+import net.ess3.api.events.NickChangeEvent;
 import org.bukkit.Bukkit;
 import org.bukkit.entity.Player;
+import org.bukkit.event.EventHandler;
+import org.bukkit.event.HandlerList;
+import org.bukkit.event.Listener;
 import org.bukkit.plugin.Plugin;
 import org.bukkit.plugin.RegisteredServiceProvider;
 
 import com.earth2me.essentials.Essentials;
 
 import me.neznamy.tab.api.placeholder.PlaceholderManager;
-import me.neznamy.tab.shared.TAB;
 import me.neznamy.tab.shared.placeholders.UniversalPlaceholderRegistry;
 import net.milkbowl.vault.chat.Chat;
+import org.bukkit.plugin.java.JavaPlugin;
 
 /**
  * Bukkit registry to register bukkit-only and universal placeholders
@@ -25,26 +33,21 @@ public class BukkitPlaceholderRegistry extends UniversalPlaceholderRegistry {
     /** Number formatter for 2 decimal places */
     private final NumberFormat numberFormat = NumberFormat.getNumberInstance(Locale.US);
 
-    private Object chat;
-    private final Plugin essentials = Bukkit.getPluginManager().getPlugin("Essentials");
+    private final JavaPlugin plugin;
+    private Chat chat;
+    private final Plugin essentials = Bukkit.getPluginManager().getPlugin(TabConstants.Plugin.ESSENTIALS);
     private Object server;
     private Field recentTps;
-    private boolean paperTps;
-    private boolean paperMspt;
-    private Method playerIsAfk;
+    private Method paperTps;
+    private Method paperMspt;
+    private Method purpurIsAfk;
 
-    /**
-     * Constructs new instance with given parameter
-     */
-    public BukkitPlaceholderRegistry() {
+    public BukkitPlaceholderRegistry(JavaPlugin plugin) {
+        this.plugin = plugin;
         numberFormat.setMaximumFractionDigits(2);
-        try {
-            if (Bukkit.getPluginManager().isPluginEnabled("Vault")) {
-                RegisteredServiceProvider<?> rspChat = Bukkit.getServicesManager().getRegistration(Class.forName("net.milkbowl.vault.chat.Chat"));
-                if (rspChat != null) chat = rspChat.getProvider();
-            }
-        } catch (ClassNotFoundException e) {
-            //modded server without vault
+        if (Bukkit.getPluginManager().isPluginEnabled(TabConstants.Plugin.VAULT)) {
+            RegisteredServiceProvider<Chat> rspChat = Bukkit.getServicesManager().getRegistration(Chat.class);
+            if (rspChat != null) chat = rspChat.getProvider();
         }
         try {
             server = Bukkit.getServer().getClass().getMethod("getServer").invoke(Bukkit.getServer());
@@ -52,70 +55,64 @@ public class BukkitPlaceholderRegistry extends UniversalPlaceholderRegistry {
         } catch (ReflectiveOperationException e) {
             //not spigot
         }
-        try {
-            Bukkit.class.getMethod("getTPS");
-            paperTps = true;
-        } catch (NoSuchMethodException e) {
-            //not paper
-        }
-        try {
-            Bukkit.class.getMethod("getAverageTickTime");
-            paperMspt = true;
-        } catch (NoSuchMethodException e) {
-            //not paper
-        }
-        try {
-            playerIsAfk = Player.class.getMethod("isAfk");
-        } catch (NoSuchMethodException e) {
-            //not purpur
-        }
+        try { paperTps = Bukkit.class.getMethod("getTPS"); } catch (NoSuchMethodException ignored) {}
+        try { paperMspt = Bukkit.class.getMethod("getAverageTickTime"); } catch (NoSuchMethodException ignored) {}
+        try { purpurIsAfk = Player.class.getMethod("isAfk"); } catch (NoSuchMethodException ignored) {}
     }
 
     @SuppressWarnings("deprecation")
     @Override
     public void registerPlaceholders(PlaceholderManager manager) {
         super.registerPlaceholders(manager);
-        manager.registerPlayerPlaceholder("%displayname%", 500, p -> ((Player) p.getPlayer()).getDisplayName());
-        if (paperTps) {
-            manager.registerServerPlaceholder("%tps%", 1000, () -> formatTPS(Bukkit.getTPS()[0]));
+        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("%tps%", 1000, () -> {
+            manager.registerServerPlaceholder(TabConstants.Placeholder.TPS, 1000, () -> {
                 try {
                     return formatTPS(((double[]) recentTps.get(server))[0]);
                 } catch (IllegalAccessException e) {
-                    return "-1";
+                    return -1;
                 }
             });
         } else {
-            manager.registerServerPlaceholder("%tps%", -1, () -> "-1").enableTriggerMode();
+            manager.registerServerPlaceholder(TabConstants.Placeholder.TPS, -1, () -> -1);
         }
-        if (paperMspt) {
-            manager.registerServerPlaceholder("%mspt%", 1000, () -> numberFormat.format(Bukkit.getAverageTickTime()));
+        if (paperMspt != null) {
+            manager.registerServerPlaceholder(TabConstants.Placeholder.MSPT, 1000, () -> numberFormat.format(Bukkit.getAverageTickTime()));
         }
-        manager.registerPlayerPlaceholder("%afk%", 500, p -> {
+        manager.registerPlayerPlaceholder(TabConstants.Placeholder.AFK, 500, p -> {
             if (essentials != null && ((Essentials)essentials).getUser(p.getUniqueId()).isAfk()) return true;
-            if (playerIsAfk == null) return false;
-            try {
-                return playerIsAfk.invoke(p.getPlayer());
-            } catch (ReflectiveOperationException exception) {
-                TAB.getInstance().getErrorManager().printError("Failed to get AFK status of " + p.getName() + " using Purpur", exception);
-            }
-            return false;
+            return purpurIsAfk != null && ((Player)p.getPlayer()).isAfk();
         });
-        manager.registerPlayerPlaceholder("%essentialsnick%", 1000, p -> {
-            String nickname = null;
-            if (essentials != null)
-                nickname = ((Essentials)essentials).getUser(p.getUniqueId()).getNickname();
-            return nickname == null || nickname.length() == 0 ? p.getName() : nickname;
-        });
-        if (chat != null) {
-            manager.registerPlayerPlaceholder("%vault-prefix%", 1000, p -> ((Chat) chat).getPlayerPrefix((Player) p.getPlayer()));
-            manager.registerPlayerPlaceholder("%vault-suffix%", 1000, p -> ((Chat) chat).getPlayerSuffix((Player) p.getPlayer()));
+        if (essentials != null) {
+            PlayerPlaceholder nick = manager.registerPlayerPlaceholder(TabConstants.Placeholder.ESSENTIALS_NICK, -1, p -> {
+                String nickname = ((Essentials)essentials).getUser(p.getUniqueId()).getNickname();
+                return nickname == null ? p.getName() : nickname;
+            });
+            Listener nickListener = new Listener() {
+                @EventHandler
+                public void onNickChange(NickChangeEvent e) {
+                    String name = e.getValue() == null ? e.getAffected().getName() : e.getValue();
+                    TabPlayer player = TAB.getInstance().getPlayer(e.getAffected().getUUID());
+                    if (player == null) return;
+                    nick.updateValue(player, name);
+                }
+            };
+            nick.enableTriggerMode(() -> Bukkit.getPluginManager().registerEvents(nickListener, plugin),
+                    () -> HandlerList.unregisterAll(nickListener));
         } else {
-            manager.registerServerPlaceholder("%vault-prefix%", -1, () -> "").enableTriggerMode();
-            manager.registerServerPlaceholder("%vault-suffix%", -1, () -> "").enableTriggerMode();
+            manager.registerPlayerPlaceholder(TabConstants.Placeholder.ESSENTIALS_NICK, -1, TabPlayer::getName);
         }
-        manager.registerPlayerPlaceholder("%health%", 100, p -> (int) Math.ceil(((Player) p.getPlayer()).getHealth()));
+
+        if (chat != null) {
+            manager.registerPlayerPlaceholder(TabConstants.Placeholder.VAULT_PREFIX, 1000, p -> chat.getPlayerPrefix((Player) p.getPlayer()));
+            manager.registerPlayerPlaceholder(TabConstants.Placeholder.VAULT_SUFFIX, 1000, p -> chat.getPlayerSuffix((Player) p.getPlayer()));
+        } else {
+            manager.registerServerPlaceholder(TabConstants.Placeholder.VAULT_PREFIX, -1, () -> "");
+            manager.registerServerPlaceholder(TabConstants.Placeholder.VAULT_SUFFIX, -1, () -> "");
+        }
+        manager.registerPlayerPlaceholder(TabConstants.Placeholder.HEALTH, 100, p -> (int) Math.ceil(((Player) p.getPlayer()).getHealth()));
     }
 
     private String formatTPS(double tps) {

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

@@ -4,7 +4,7 @@ import com.earth2me.essentials.Essentials;
 import com.viaversion.viaversion.api.Via;
 import me.clip.placeholderapi.PlaceholderAPI;
 import me.neznamy.tab.api.TabPlayer;
-import me.neznamy.tab.api.util.Preconditions;
+import me.neznamy.tab.api.chat.EnumChatFormat;
 import me.neznamy.tab.platforms.bukkit.event.TabLoadEvent;
 import me.neznamy.tab.platforms.bukkit.event.TabPlayerLoadEvent;
 import me.neznamy.tab.platforms.bukkit.features.BukkitTabExpansion;
@@ -15,7 +15,7 @@ import me.neznamy.tab.platforms.bukkit.features.unlimitedtags.BukkitNameTagX;
 import me.neznamy.tab.platforms.bukkit.permission.Vault;
 import me.neznamy.tab.shared.Platform;
 import me.neznamy.tab.shared.TAB;
-import me.neznamy.tab.shared.TabConstants;
+import me.neznamy.tab.api.TabConstants;
 import me.neznamy.tab.shared.features.PlaceholderManagerImpl;
 import me.neznamy.tab.shared.features.bossbar.BossBarManagerImpl;
 import me.neznamy.tab.shared.features.nametags.NameTag;
@@ -41,11 +41,11 @@ public class BukkitPlatform extends Platform {
     private final JavaPlugin plugin;
 
     /** Variables checking presence of other plugins to hook into */
-    private final boolean placeholderAPI = Bukkit.getPluginManager().isPluginEnabled("PlaceholderAPI");
-    private boolean libsDisguises = Bukkit.getPluginManager().isPluginEnabled("LibsDisguises");
-    private final Plugin essentials = Bukkit.getPluginManager().getPlugin("Essentials");
+    private final boolean placeholderAPI = Bukkit.getPluginManager().isPluginEnabled(TabConstants.Plugin.PLACEHOLDER_API);
+    private boolean libsDisguises = Bukkit.getPluginManager().isPluginEnabled(TabConstants.Plugin.LIBS_DISGUISES);
+    private final Plugin essentials = Bukkit.getPluginManager().getPlugin(TabConstants.Plugin.ESSENTIALS);
     private Plugin viaVersion;
-    private final boolean protocolSupport = Bukkit.getPluginManager().isPluginEnabled("ProtocolSupport");
+    private final boolean protocolSupport = Bukkit.getPluginManager().isPluginEnabled(TabConstants.Plugin.PROTOCOL_SUPPORT);
 
     /**
      * Constructs new instance with given plugin parameter
@@ -55,18 +55,17 @@ public class BukkitPlatform extends Platform {
      */
     public BukkitPlatform(JavaPlugin plugin) {
         super(new BukkitPacketBuilder());
-        Preconditions.checkNotNull(plugin, "plugin");
         this.plugin = plugin;
     }
 
     @Override
     public PermissionPlugin detectPermissionPlugin() {
-        if (Bukkit.getPluginManager().isPluginEnabled("LuckPerms")) {
-            return new LuckPerms(getPluginVersion("LuckPerms"));
-        } else if (Bukkit.getPluginManager().isPluginEnabled("Vault")) {
+        if (Bukkit.getPluginManager().isPluginEnabled(TabConstants.Plugin.LUCKPERMS)) {
+            return new LuckPerms(getPluginVersion(TabConstants.Plugin.LUCKPERMS));
+        } else if (Bukkit.getPluginManager().isPluginEnabled(TabConstants.Plugin.VAULT)) {
             RegisteredServiceProvider<Permission> provider = Bukkit.getServicesManager().getRegistration(Permission.class);
             if (provider == null) return new None();
-            return new Vault(provider.getProvider(), getPluginVersion("Vault"));
+            return new Vault(provider.getProvider(), getPluginVersion(TabConstants.Plugin.VAULT));
         } else {
             return new None();
         }
@@ -74,26 +73,20 @@ public class BukkitPlatform extends Platform {
 
     @Override
     public void loadFeatures() {
-        if (Bukkit.getPluginManager().isPluginEnabled("ViaVersion")) {
+        if (Bukkit.getPluginManager().isPluginEnabled(TabConstants.Plugin.VIAVERSION)) {
             try {
                 Class.forName("com.viaversion.viaversion.api.Via");
-                viaVersion = Bukkit.getPluginManager().getPlugin("ViaVersion");
+                viaVersion = Bukkit.getPluginManager().getPlugin(TabConstants.Plugin.VIAVERSION);
             } catch (ClassNotFoundException e) {
-                TAB.getInstance().sendConsoleMessage("&cAn outdated version of ViaVersion (" + getPluginVersion("ViaVersion") + ") was detected.", true);
+                TAB.getInstance().sendConsoleMessage("&cAn outdated version of ViaVersion (" + getPluginVersion(TabConstants.Plugin.VIAVERSION) + ") was detected.", true);
                 TAB.getInstance().sendConsoleMessage("&cTAB only supports ViaVersion 4.0.0 and above. Disabling ViaVersion hook.", true);
                 TAB.getInstance().sendConsoleMessage("&cThis might cause problems, such as limitations still being present for latest MC clients as well as RGB not working.", true);
             }
         }
-        if (Bukkit.getPluginManager().isPluginEnabled("Tablisknu")) {
-            TAB.getInstance().sendConsoleMessage("&cDetected plugin \"Tablisknu\", which causes TAB to not work properly. Consider removing the plugin.", true);
-        }
-        if (Bukkit.getPluginManager().isPluginEnabled("SkBee")) {
-            TAB.getInstance().sendConsoleMessage("&cDetected plugin \"SkBee\", which causes TAB's scoreboard to not show. Consider removing the plugin.", true);
-        }
         TAB tab = TAB.getInstance();
         if (tab.getConfiguration().isPipelineInjection())
             tab.getFeatureManager().registerFeature(TabConstants.Feature.PIPELINE_INJECTION, new BukkitPipelineInjector());
-        new BukkitPlaceholderRegistry().registerPlaceholders(tab.getPlaceholderManager());
+        new BukkitPlaceholderRegistry(plugin).registerPlaceholders(tab.getPlaceholderManager());
         if (tab.getConfiguration().getConfig().getBoolean("scoreboard-teams.enabled", true)) {
             if (tab.getConfiguration().getConfig().getBoolean("scoreboard-teams.unlimited-nametag-mode.enabled", false) && tab.getServerVersion().getMinorVersion() >= 8) {
                 tab.getFeatureManager().registerFeature(TabConstants.Feature.UNLIMITED_NAME_TAGS, new BukkitNameTagX(plugin));
@@ -125,7 +118,6 @@ public class BukkitPlatform extends Platform {
 
     @Override
     public String getPluginVersion(String plugin) {
-        Preconditions.checkNotNull(plugin, "plugin");
         Plugin pl = Bukkit.getPluginManager().getPlugin(plugin);
         return pl == null ? null : pl.getDescription().getVersion();
     }
@@ -154,7 +146,6 @@ public class BukkitPlatform extends Platform {
 
     @Override
     public void registerUnknownPlaceholder(String identifier) {
-        Preconditions.checkNotNull(identifier, "identifier");
         PlaceholderManagerImpl pl = TAB.getInstance().getPlaceholderManager();
         if (identifier.startsWith("%rel_")) {
             //relational placeholder
@@ -231,11 +222,6 @@ public class BukkitPlatform extends Platform {
         return (Essentials) essentials;
     }
 
-    @Override
-    public boolean isProxy() {
-        return false;
-    }
-
     @Override
     public String getConfigName() {
         return "bukkitconfig.yml";
@@ -271,7 +257,7 @@ public class BukkitPlatform extends Platform {
         try {
             Object protocolVersion = Class.forName("protocolsupport.api.ProtocolSupportAPI").getMethod("getProtocolVersion", Player.class).invoke(null, player);
             int version = (int) protocolVersion.getClass().getMethod("getId").invoke(protocolVersion);
-            TAB.getInstance().debug("ProtocolSupport returned protocol version " + version + " for " + player.getName() + "(online=" + player.isOnline() + ")");
+            TAB.getInstance().debug("ProtocolSupport returned protocol version " + version + " for " + player.getName() + " (online=" + player.isOnline() + ")");
             return version;
         } catch (ReflectiveOperationException e) {
             TAB.getInstance().getErrorManager().printError(String.format("Failed to get protocol version of %s using ProtocolSupport", player.getName()), e);
@@ -298,7 +284,7 @@ public class BukkitPlatform extends Platform {
                 Thread.sleep(5);
                 return getProtocolVersionVia(player, retryLevel + 1);
             }
-            TAB.getInstance().debug("ViaVersion returned protocol version " + version + " for " + player.getName() + "(online=" + player.isOnline() + ")");
+            TAB.getInstance().debug("ViaVersion returned protocol version " + version + " for " + player.getName() + " (online=" + player.isOnline() + ")");
             return version;
         } catch (InterruptedException e) {
             Thread.currentThread().interrupt();
@@ -308,4 +294,18 @@ public class BukkitPlatform extends Platform {
             return TAB.getInstance().getServerVersion().getNetworkId();
         }
     }
+
+    /**
+     * Sends console message using ConsoleCommandSender, due to
+     * Paper not translating colors correctly in Logger messages
+     *
+     * @param   message
+     *          Message to send
+     * @param   translateColors
+     *          Whether color codes should be translated or not
+     */
+    @Override
+    public void sendConsoleMessage(String message, boolean translateColors) {
+        Bukkit.getConsoleSender().sendMessage("[TAB] " + (translateColors ? EnumChatFormat.color(message) : message));
+    }
 }

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

@@ -3,6 +3,7 @@ package me.neznamy.tab.platforms.bukkit;
 import java.util.*;
 
 import com.mojang.authlib.properties.Property;
+import me.neznamy.tab.api.protocol.PacketPlayOutChat;
 import me.neznamy.tab.api.protocol.Skin;
 import me.neznamy.tab.api.util.Preconditions;
 import org.bukkit.Bukkit;
@@ -10,6 +11,7 @@ import org.bukkit.boss.BarColor;
 import org.bukkit.boss.BarFlag;
 import org.bukkit.boss.BarStyle;
 import org.bukkit.boss.BossBar;
+import org.bukkit.entity.Entity;
 import org.bukkit.entity.Player;
 import org.bukkit.metadata.MetadataValue;
 import org.bukkit.potion.PotionEffectType;
@@ -22,7 +24,6 @@ import com.viaversion.viaversion.api.legacy.bossbar.BossFlag;
 import com.viaversion.viaversion.api.legacy.bossbar.BossStyle;
 
 import io.netty.channel.Channel;
-import me.libraryaddict.disguise.DisguiseAPI;
 import me.neznamy.tab.api.chat.rgb.RGBUtils;
 import me.neznamy.tab.api.protocol.PacketPlayOutBoss;
 import me.neznamy.tab.platforms.bukkit.nms.NMSStorage;
@@ -55,7 +56,7 @@ public class BukkitTabPlayer extends ITabPlayer {
      *          Player's protocol network id
      */
     public BukkitTabPlayer(Player p, int protocolVersion){
-        super(p, p.getUniqueId(), p.getName(), "N/A", p.getWorld().getName(), protocolVersion);
+        super(p, p.getUniqueId(), p.getName(), "N/A", p.getWorld().getName(), protocolVersion, true);
         try {
             handle = NMSStorage.getInstance().getHandle.invoke(player);
             playerConnection = NMSStorage.getInstance().PLAYER_CONNECTION.get(handle);
@@ -95,6 +96,8 @@ public class BukkitTabPlayer extends ITabPlayer {
                 } else {
                     handleVia((PacketPlayOutBoss) nmsPacket);
                 }
+            } else if (nmsPacket instanceof PacketPlayOutChat) {
+                getPlayer().sendMessage(((PacketPlayOutChat) nmsPacket).getMessage().toLegacyText());
             } else {
                 NMSStorage.getInstance().sendPacket.invoke(playerConnection, nmsPacket);
             }
@@ -240,8 +243,8 @@ public class BukkitTabPlayer extends ITabPlayer {
     public boolean isDisguised() {
         try {
             if (!((BukkitPlatform)TAB.getInstance().getPlatform()).isLibsDisguisesEnabled()) return false;
-            return DisguiseAPI.isDisguised(getPlayer());
-        } catch (LinkageError e) {
+            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);
@@ -249,7 +252,6 @@ public class BukkitTabPlayer extends ITabPlayer {
         }
     }
 
-    @SuppressWarnings("unchecked")
     @Override
     public Skin getSkin() {
         try {

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

@@ -5,6 +5,8 @@ import java.util.Arrays;
 import java.util.List;
 import java.util.logging.Level;
 
+import me.neznamy.tab.api.TabAPI;
+import me.neznamy.tab.platforms.bukkit.nms.*;
 import org.bstats.bukkit.Metrics;
 import org.bstats.charts.SimplePie;
 import org.bukkit.Bukkit;
@@ -14,9 +16,8 @@ import org.bukkit.plugin.java.JavaPlugin;
 import me.neznamy.tab.api.ProtocolVersion;
 import me.neznamy.tab.api.TabPlayer;
 import me.neznamy.tab.api.chat.EnumChatFormat;
-import me.neznamy.tab.platforms.bukkit.nms.NMSStorage;
 import me.neznamy.tab.shared.TAB;
-import me.neznamy.tab.shared.TabConstants;
+import me.neznamy.tab.api.TabConstants;
 import org.jetbrains.annotations.NotNull;
 
 /**
@@ -26,24 +27,25 @@ public class Main extends JavaPlugin {
 
     @Override
     public void onEnable(){
-        getLogger().info(EnumChatFormat.color("&7Server version: " + Bukkit.getBukkitVersion().split("-")[0] + " (" + Bukkit.getServer().getClass().getPackage().getName().split("\\.")[3] + ")"));
+        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 = new BukkitPlatform(this);
-        TAB.setInstance(new TAB(platform, ProtocolVersion.fromFriendlyName(Bukkit.getBukkitVersion().split("-")[0]),
-                Bukkit.getBukkitVersion().split("-")[0] + " (" + Bukkit.getServer().getClass().getPackage().getName().split("\\.")[3] + ")", getDataFolder(), getLogger()));
+        TAB.setInstance(new TAB(platform, ProtocolVersion.fromFriendlyName(version), version + " (" + serverPackage + ")", getDataFolder(), getLogger()));
         if (TAB.getInstance().getServerVersion() == ProtocolVersion.UNKNOWN_SERVER_VERSION) {
-            getLogger().info(EnumChatFormat.color("&cUnknown server version: " + Bukkit.getBukkitVersion() + "! Plugin may not work correctly."));
+            Bukkit.getConsoleSender().sendMessage(EnumChatFormat.color("&c[TAB] Unknown server version: " + Bukkit.getBukkitVersion() + "! Plugin may not work correctly."));
         }
         Bukkit.getPluginManager().registerEvents(new BukkitEventListener(platform), this);
         TAB.getInstance().load();
         Metrics metrics = new Metrics(this, 5304);
-        metrics.addCustomChart(new SimplePie("unlimited_nametag_mode_enabled", () -> TAB.getInstance().getFeatureManager().isFeatureEnabled(TabConstants.Feature.UNLIMITED_NAME_TAGS) ? "Yes" : "No"));
-        metrics.addCustomChart(new SimplePie("placeholderapi", () -> Bukkit.getPluginManager().isPluginEnabled("PlaceholderAPI") ? "Yes" : "No"));
-        metrics.addCustomChart(new SimplePie("permission_system", () -> TAB.getInstance().getGroupManager().getPlugin().getName()));
-        metrics.addCustomChart(new SimplePie("server_version", () -> "1." + TAB.getInstance().getServerVersion().getMinorVersion() + ".x"));
+        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, () -> Bukkit.getPluginManager().isPluginEnabled(TabConstants.Plugin.PLACEHOLDER_API) ? "Yes" : "No"));
+        metrics.addCustomChart(new SimplePie(TabConstants.MetricsChart.PERMISSION_SYSTEM, () -> TAB.getInstance().getGroupManager().getPlugin().getName()));
+        metrics.addCustomChart(new SimplePie(TabConstants.MetricsChart.SERVER_VERSION, () -> "1." + TAB.getInstance().getServerVersion().getMinorVersion() + ".x"));
         PluginCommand cmd = Bukkit.getPluginCommand("tab");
         if (cmd == null) return;
         TABCommand command = new TABCommand();
@@ -53,7 +55,7 @@ public class Main extends JavaPlugin {
 
     @Override
     public void onDisable() {
-        //null check due to L31 return making L34 not run
+        //null check due to L34 return making L37 not run
         if (TAB.getInstance() != null) TAB.getInstance().unload();
     }
     
@@ -69,22 +71,33 @@ public class Main extends JavaPlugin {
                 "v1_5_R1", "v1_5_R2", "v1_5_R3", "v1_6_R1", "v1_6_R2", "v1_6_R3",
                 "v1_7_R1", "v1_7_R2", "v1_7_R3", "v1_7_R4", "v1_8_R1", "v1_8_R2", "v1_8_R3",
                 "v1_9_R1", "v1_9_R2", "v1_10_R1", "v1_11_R1", "v1_12_R1", "v1_13_R1", "v1_13_R2",
-                "v1_14_R1", "v1_15_R1", "v1_16_R1", "v1_16_R2", "v1_16_R3", "v1_17_R1", "v1_18_R1", "v1_18_R2");
+                "v1_14_R1", "v1_15_R1", "v1_16_R1", "v1_16_R2", "v1_16_R3", "v1_17_R1", "v1_18_R1",
+                "v1_18_R2", "v1_19_R1");
         String serverPackage = Bukkit.getServer().getClass().getPackage().getName().split("\\.")[3];
         try {
             long time = System.currentTimeMillis();
-            NMSStorage.setInstance(new NMSStorage());
+            int minorVersion = Integer.parseInt(serverPackage.split("_")[1]);
+            if (minorVersion >= 17) {
+                try {
+                    NMSStorage.setInstance(new BukkitModernNMSStorage());
+                } catch (ClassNotFoundException e) {
+                    NMSStorage.setInstance(new MojangModernNMSStorage());
+                }
+            } else {
+                NMSStorage.setInstance(new LegacyNMSStorage());
+            }
             if (supportedVersions.contains(serverPackage)) {
-                getLogger().info(EnumChatFormat.color("&7Loaded NMS hook in " + (System.currentTimeMillis()-time) + "ms"));
+                Bukkit.getConsoleSender().sendMessage(EnumChatFormat.color("[TAB] Loaded NMS hook in " + (System.currentTimeMillis()-time) + "ms"));
                 return true;
             } else {
-                getLogger().info(EnumChatFormat.color("&cNo compatibility issue was found, but this plugin version does not claim to support your server package (" + serverPackage + "). This jar has only been tested on 1.5.x - 1.18.2. Disabling just to stay safe."));
+                Bukkit.getConsoleSender().sendMessage(EnumChatFormat.color("&c[TAB] No compatibility issue was found, but this plugin version does not claim to support your server package (" + serverPackage + "). This jar has only been tested on 1.5.x - 1.19. Disabling just to stay safe."));
             }
         } catch (Exception ex) {
             if (supportedVersions.contains(serverPackage)) {
-                getLogger().log(Level.SEVERE, EnumChatFormat.color("&cYour server version is marked as compatible, but a compatibility issue was found. Please report the error below (include your server version & fork too)"), ex);
+                Bukkit.getConsoleSender().sendMessage(EnumChatFormat.color("&c[TAB] Your server version is marked as compatible, but a compatibility issue was found. Please report the error below (include your server version & fork too)"));
+                getLogger().log(Level.SEVERE, "", ex);
             } else {
-                getLogger().info(EnumChatFormat.color("&cYour server version is completely unsupported. This plugin version only supports 1.5.x - 1.18.2. Disabling."));
+                Bukkit.getConsoleSender().sendMessage(EnumChatFormat.color("&c[TAB] Your server version is completely unsupported. This plugin version only supports 1.5.x - 1.19. Disabling."));
             }
         }
         return false;
@@ -93,11 +106,11 @@ public class Main extends JavaPlugin {
     /**
      * Command handler for /tab command
      */
-    public static class TABCommand implements CommandExecutor, TabCompleter {
+    private static class TABCommand implements CommandExecutor, TabCompleter {
 
         @Override
         public boolean onCommand(@NotNull CommandSender sender, @NotNull Command command, @NotNull String label, String[] args) {
-            if (TAB.getInstance().isDisabled()) {
+            if (TabAPI.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));
                 }

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

@@ -2,14 +2,14 @@ package me.neznamy.tab.platforms.bukkit.features;
 
 import me.clip.placeholderapi.PlaceholderAPI;
 import me.clip.placeholderapi.expansion.PlaceholderExpansion;
+import me.neznamy.tab.api.TabAPI;
+import me.neznamy.tab.api.TabConstants;
+import me.neznamy.tab.api.TabFeature;
 import me.neznamy.tab.api.TabPlayer;
-import me.neznamy.tab.shared.TAB;
-import me.neznamy.tab.shared.TabConstants;
 import me.neznamy.tab.shared.features.TabExpansion;
 import org.bukkit.entity.Player;
 import org.jetbrains.annotations.NotNull;
 
-import java.util.Collections;
 import java.util.HashMap;
 import java.util.Map;
 import java.util.WeakHashMap;
@@ -27,11 +27,6 @@ public class BukkitTabExpansion extends PlaceholderExpansion implements TabExpan
         return true;
     }
 
-    @Override
-    public boolean canRegister(){
-        return true;
-    }
-
     @Override
     public @NotNull String getAuthor(){
         return "NEZNAMY";
@@ -49,51 +44,22 @@ public class BukkitTabExpansion extends PlaceholderExpansion implements TabExpan
 
     @Override
     public String onPlaceholderRequest(Player player, @NotNull String identifier){
-        if (player == null) return "";
-        TabPlayer p = TAB.getInstance().getPlayer(player.getUniqueId());
         if (identifier.startsWith("replace_")) {
             String placeholder = "%" + identifier.substring(8) + "%";
             String output = PlaceholderAPI.setPlaceholders(player, placeholder);
-            return TAB.getInstance().getPlaceholderManager().findReplacement(placeholder, output);
+            return TabAPI.getInstance().getPlaceholderManager().findReplacement(placeholder, output);
         }
         if (identifier.startsWith("placeholder_")) {
-            TAB.getInstance().getPlaceholderManager().addUsedPlaceholders(Collections.singletonList("%" + identifier.substring(12) + "%"));
+            TabAPI.getInstance().getPlaceholderManager().addUsedPlaceholder("%" + identifier.substring(12) + "%", (TabFeature) TabAPI.getInstance().getPlaceholderManager());
         }
-        return values.computeIfAbsent(p, pl -> new HashMap<>()).get(identifier);
+        if (player == null) return "<Player cannot be null>";
+        TabPlayer p = TabAPI.getInstance().getPlayer(player.getUniqueId());
+        if (p == null || !p.isLoaded()) return "<Player is not loaded>";
+        return values.get(p).get(identifier);
     }
 
     @Override
-    public void setScoreboardVisible(TabPlayer player, boolean visible) {
-        values.computeIfAbsent(player, p -> new HashMap<>()).put("scoreboard_visible", visible ? "Enabled" : "Disabled");
-    }
-
-    @Override
-    public void setScoreboardName(TabPlayer player, String name) {
-        values.computeIfAbsent(player, p -> new HashMap<>()).put("scoreboard_name", name);
-    }
-
-    @Override
-    public void setBossBarVisible(TabPlayer player, boolean visible) {
-        values.computeIfAbsent(player, p -> new HashMap<>()).put("bossbar_visible", visible ? "Enabled" : "Disabled");
-    }
-
-    @Override
-    public void setNameTagPreview(TabPlayer player, boolean previewing) {
-        values.computeIfAbsent(player, p -> new HashMap<>()).put("ntpreview", previewing ? "Enabled" : "Disabled");
-    }
-
-    @Override
-    public void setPlaceholderValue(TabPlayer player, String placeholder, String value) {
-        values.computeIfAbsent(player, p -> new HashMap<>()).put("placeholder_" + placeholder.substring(1, placeholder.length()-1), value);
-    }
-
-    @Override
-    public void setPropertyValue(TabPlayer player, String property, String value) {
-        values.computeIfAbsent(player, p -> new HashMap<>()).put(property, value);
-    }
-
-    @Override
-    public void setRawPropertyValue(TabPlayer player, String property, String value) {
-        values.computeIfAbsent(player, p -> new HashMap<>()).put(property + "_raw", value);
+    public void setValue(TabPlayer player, String key, String value) {
+        values.computeIfAbsent(player, p -> new HashMap<>()).put(key, value);
     }
 }

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

@@ -5,6 +5,7 @@ import java.util.List;
 import java.util.Map;
 import java.util.Map.Entry;
 
+import me.neznamy.tab.api.TabAPI;
 import org.bukkit.Bukkit;
 import org.bukkit.entity.Player;
 import org.bukkit.event.EventHandler;
@@ -15,7 +16,7 @@ import org.bukkit.event.player.PlayerJoinEvent;
 import org.bukkit.plugin.java.JavaPlugin;
 
 import me.neznamy.tab.api.TabFeature;
-import me.neznamy.tab.shared.TabConstants;
+import me.neznamy.tab.api.TabConstants;
 import me.neznamy.tab.shared.TAB;
 
 /**
@@ -28,9 +29,9 @@ public class PerWorldPlayerList extends TabFeature implements Listener {
     private final JavaPlugin plugin;
 
     //config options
-    private final boolean allowBypass = TAB.getInstance().getConfiguration().getConfig().getBoolean("per-world-playerlist.allow-bypass-permission", false);
-    private final List<String> ignoredWorlds = TAB.getInstance().getConfiguration().getConfig().getStringList("per-world-playerlist.ignore-effect-in-worlds", Arrays.asList("ignoredworld", "build"));
-    private final Map<String, List<String>> sharedWorlds = TAB.getInstance().getConfiguration().getConfig().getConfigurationSection("per-world-playerlist.shared-playerlist-world-groups");
+    private final boolean allowBypass = TabAPI.getInstance().getConfig().getBoolean("per-world-playerlist.allow-bypass-permission", false);
+    private final List<String> ignoredWorlds = TabAPI.getInstance().getConfig().getStringList("per-world-playerlist.ignore-effect-in-worlds", Arrays.asList("ignoredworld", "build"));
+    private final Map<String, List<String>> sharedWorlds = TabAPI.getInstance().getConfig().getConfigurationSection("per-world-playerlist.shared-playerlist-world-groups");
 
     /**
      * Constructs new instance with given parameters and loads config options
@@ -41,7 +42,7 @@ public class PerWorldPlayerList extends TabFeature implements Listener {
     public PerWorldPlayerList(JavaPlugin plugin) {
         super("Per world PlayerList", null);
         this.plugin = plugin;
-        TAB.getInstance().debug(String.format("Loaded PerWorldPlayerList feature with parameters allowBypass=%s, ignoredWorlds=%s, sharedWorlds=%s", allowBypass, ignoredWorlds, sharedWorlds));
+        TabAPI.getInstance().debug(String.format("Loaded PerWorldPlayerList feature with parameters allowBypass=%s, ignoredWorlds=%s, sharedWorlds=%s", allowBypass, ignoredWorlds, sharedWorlds));
         Bukkit.getPluginManager().registerEvents(this, plugin);
     }
 

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

@@ -1,13 +1,16 @@
 package me.neznamy.tab.platforms.bukkit.features;
 
-import java.util.*;
-
+import me.neznamy.tab.api.TabAPI;
 import me.neznamy.tab.api.TabFeature;
 import me.neznamy.tab.api.TabPlayer;
 import me.neznamy.tab.platforms.bukkit.nms.NMSStorage;
 import me.neznamy.tab.platforms.bukkit.nms.datawatcher.DataWatcher;
 import me.neznamy.tab.platforms.bukkit.nms.datawatcher.DataWatcherItem;
-import me.neznamy.tab.shared.TAB;
+
+import java.util.ConcurrentModificationException;
+import java.util.List;
+import java.util.Optional;
+import java.util.WeakHashMap;
 
 /**
  * A feature to disable minecraft 1.9+ feature making tamed animals
@@ -45,7 +48,7 @@ public class PetFix extends TabFeature {
      */
     public PetFix() {
         super("Pet name fix", null);
-        TAB.getInstance().debug("Loaded PetFix feature");
+        TabAPI.getInstance().debug("Loaded PetFix feature");
     }
 
     /**
@@ -55,7 +58,7 @@ public class PetFix extends TabFeature {
      */
     private int getPetOwnerPosition() {
         if (nms.getMinorVersion() >= 17) {
-            //1.17.x, 1.18.x
+            //1.17.x, 1.18.x, 1.19.x
             return 18;
         } else if (nms.getMinorVersion() >= 15) {
             //1.15.x, 1.16.x
@@ -80,15 +83,13 @@ public class PetFix extends TabFeature {
      */
     @Override
     public boolean onPacketReceive(TabPlayer sender, Object packet) throws ReflectiveOperationException {
-        if (nms.PacketPlayInUseEntity.isInstance(packet)) {
-            if (lastInteractFix.containsKey(sender) && (System.currentTimeMillis() - lastInteractFix.get(sender) < INTERACT_COOLDOWN)) {
+        if (nms.PacketPlayInUseEntity.isInstance(packet) && isInteract(nms.PacketPlayInUseEntity_ACTION.get(packet))) {
+            if (System.currentTimeMillis() - lastInteractFix.getOrDefault(sender, 0L) < INTERACT_COOLDOWN) {
                 //last interact packet was sent right now, cancelling to prevent double-toggle due to this feature enabled
                 return true;
             }
-            if (isInteract(nms.PacketPlayInUseEntity_ACTION.get(packet))) {
-                //this is the first packet, saving player so the next packet can be cancelled
-                lastInteractFix.put(sender, System.currentTimeMillis());
-            }
+            //this is the first packet, saving player so the next packet can be cancelled
+            lastInteractFix.put(sender, System.currentTimeMillis());
         }
         return false;
     }

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

@@ -1,6 +1,5 @@
 package me.neznamy.tab.platforms.bukkit.features;
 
-import me.neznamy.tab.api.util.Preconditions;
 import org.bukkit.Bukkit;
 import org.bukkit.Location;
 import org.bukkit.entity.Player;
@@ -13,7 +12,7 @@ import org.bukkit.plugin.java.JavaPlugin;
 import me.neznamy.tab.api.TabPlayer;
 import me.neznamy.tab.api.bossbar.BossBar;
 import me.neznamy.tab.platforms.bukkit.nms.PacketPlayOutEntityTeleport;
-import me.neznamy.tab.shared.TabConstants;
+import me.neznamy.tab.api.TabConstants;
 import me.neznamy.tab.shared.TAB;
 import me.neznamy.tab.shared.features.bossbar.BossBarManagerImpl;
 
@@ -32,7 +31,6 @@ public class WitherBossBar extends BossBarManagerImpl implements Listener {
      *          plugin instance
      */
     public WitherBossBar(JavaPlugin plugin) {
-        Preconditions.checkNotNull(plugin, "plugin");
         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

bukkit/src/main/java/me/neznamy/tab/platforms/bukkit/features/unlimitedtags/BukkitArmorStand.java

@@ -1,16 +1,6 @@
 package me.neznamy.tab.platforms.bukkit.features.unlimitedtags;
 
-import java.util.UUID;
-
-import org.bukkit.Location;
-import org.bukkit.entity.Entity;
-import org.bukkit.entity.EntityType;
-import org.bukkit.entity.Player;
-import org.bukkit.entity.Pose;
-
-import me.neznamy.tab.api.ArmorStand;
-import me.neznamy.tab.api.Property;
-import me.neznamy.tab.api.TabPlayer;
+import me.neznamy.tab.api.*;
 import me.neznamy.tab.api.chat.EnumChatFormat;
 import me.neznamy.tab.api.chat.IChatBaseComponent;
 import me.neznamy.tab.api.protocol.TabPacket;
@@ -19,8 +9,13 @@ import me.neznamy.tab.platforms.bukkit.nms.PacketPlayOutEntityMetadata;
 import me.neznamy.tab.platforms.bukkit.nms.PacketPlayOutEntityTeleport;
 import me.neznamy.tab.platforms.bukkit.nms.PacketPlayOutSpawnEntityLiving;
 import me.neznamy.tab.platforms.bukkit.nms.datawatcher.DataWatcher;
-import me.neznamy.tab.shared.TabConstants;
-import me.neznamy.tab.shared.TAB;
+import org.bukkit.Location;
+import org.bukkit.entity.Entity;
+import org.bukkit.entity.EntityType;
+import org.bukkit.entity.Player;
+import org.bukkit.entity.Pose;
+
+import java.util.UUID;
 
 /**
  * A class representing an armor stand attached to a player (if the feature is enabled)
@@ -31,7 +26,7 @@ public class BukkitArmorStand implements ArmorStand {
     private static int idCounter = 2000000000;
 
     //NameTag feature
-    private final BukkitNameTagX manager = (BukkitNameTagX) TAB.getInstance().getFeatureManager().getFeature(TabConstants.Feature.UNLIMITED_NAME_TAGS);
+    private final BukkitNameTagX manager = (BukkitNameTagX) TabAPI.getInstance().getFeatureManager().getFeature(TabConstants.Feature.UNLIMITED_NAME_TAGS);
 
     private final BukkitArmorStandManager asm;
     
@@ -73,6 +68,7 @@ public class BukkitArmorStand implements ArmorStand {
         this.yOffset = yOffset;
         this.property = owner.getProperty(propertyName);
         visible = getVisibility();
+        sneaking = player.isSneaking();
     }
 
     @Override
@@ -204,20 +200,28 @@ public class BukkitArmorStand implements ArmorStand {
     /**
      * Returns general location where armor stand should be at time of calling
      *
+     * @param   viewer
+     *          Player looking at the armor stand
      * @return  Location where armor stand should be for everyone
      */
-    public Location getLocation() {
+    public Location getLocation(TabPlayer viewer) {
         double x = player.getLocation().getX();
-        double y = getY() + yOffset + 2;
+        double y = getY() + yOffset;
         double z = player.getLocation().getZ();
-        if (player.isSleeping()) {
-            y -= 1.76;
-        } else {
-            if (TAB.getInstance().getServerVersion().getMinorVersion() >= 9) {
-                y -= (sneaking ? 0.45 : 0.18);
+        if (!player.isSleeping()) {
+            if (sneaking) {
+                if (viewer.getVersion().getMinorVersion() >= 15) {
+                    y += 1.37;
+                } else if (viewer.getVersion().getMinorVersion() >= 9) {
+                    y += 1.52;
+                } else {
+                    y += 1.7;
+                }
             } else {
-                y -= (sneaking ? 0.30 : 0.18);
+                y += viewer.getVersion().getMinorVersion() >= 9 ? 1.8 : 1.84; // Normal
             }
+        } else {
+            y += viewer.getVersion().getMinorVersion() >= 9 ? 0.2 : 0.26; // Sleeping
         }
         return new Location(null,x,y,z);
     }
@@ -245,15 +249,15 @@ public class BukkitArmorStand implements ArmorStand {
             }
         }
         //1.13+ swimming or 1.9+ flying with elytra
-        if (isSwimming() || (TAB.getInstance().getServerVersion().getMinorVersion() >= 9 && player.isGliding())) {
+        if (isSwimming() || (TabAPI.getInstance().getServerVersion().getMinorVersion() >= 9 && player.isGliding())) {
             return player.getLocation().getY()-1.22;
         }
         return player.getLocation().getY();
     }
 
     private boolean isSwimming() {
-        if (TAB.getInstance().getServerVersion().getMinorVersion() >= 14 && player.getPose() == Pose.SWIMMING) return true;
-        return TAB.getInstance().getServerVersion().getMinorVersion() == 13 && player.isSwimming();
+        if (TabAPI.getInstance().getServerVersion().getMinorVersion() >= 14 && player.getPose() == Pose.SWIMMING) return true;
+        return TabAPI.getInstance().getServerVersion().getMinorVersion() == 13 && player.isSwimming();
     }
 
     /**
@@ -311,7 +315,7 @@ public class BukkitArmorStand implements ArmorStand {
     public TabPacket[] getSpawnPackets(TabPlayer viewer) {
         visible = getVisibility();
         DataWatcher dataWatcher = createDataWatcher(property.getFormat(viewer), viewer);
-        if (TAB.getInstance().getServerVersion().getMinorVersion() >= 15) {
+        if (TabAPI.getInstance().getServerVersion().getMinorVersion() >= 15) {
             return new TabPacket[] {
                     new PacketPlayOutSpawnEntityLiving(entityId, uuid, EntityType.ARMOR_STAND, getArmorStandLocationFor(viewer), null),
                     new PacketPlayOutEntityMetadata(entityId, dataWatcher)
@@ -331,18 +335,14 @@ public class BukkitArmorStand implements ArmorStand {
      * @return  location of armor stand
      */
     public Location getArmorStandLocationFor(TabPlayer viewer) {
-        return viewer.getVersion().getMinorVersion() == 8 && !manager.isMarkerFor18x() ? getLocation().clone().add(0,-2,0) : getLocation();
+        return viewer.getVersion().getMinorVersion() == 8 && !manager.isMarkerFor18x() ? getLocation(viewer).add(0,-2,0) : getLocation(viewer);
     }
 
     @Override
     public void respawn(TabPlayer viewer) {
         viewer.sendCustomPacket(destroyPacket, TabConstants.PacketCategory.UNLIMITED_NAMETAGS_DESPAWN);
-        Runnable spawn = () -> spawn(viewer);
-        if (viewer.getVersion().getMinorVersion() == 8) {
-            //1.8.0 client sided bug
-            TAB.getInstance().getCPUManager().runTaskLater(50, manager, TabConstants.CpuUsageCategory.V1_8_0_BUG_COMPENSATION, spawn);
-        } else {
-            spawn.run();
-        }
+        // 1.8.0 will not see entity that respawned in the same tick
+        // creating new delayed task every time someone sneaks can be abused and cause OOM
+        spawn(viewer);
     }
 }

bukkit/src/main/java/me/neznamy/tab/platforms/bukkit/features/unlimitedtags/BukkitArmorStandManager.java

@@ -3,7 +3,7 @@ package me.neznamy.tab.platforms.bukkit.features.unlimitedtags;
 import me.neznamy.tab.api.ArmorStand;
 import me.neznamy.tab.api.ArmorStandManager;
 import me.neznamy.tab.api.TabPlayer;
-import me.neznamy.tab.shared.TabConstants;
+import me.neznamy.tab.api.TabConstants;
 import me.neznamy.tab.shared.features.nametags.unlimited.NameTagX;
 
 import java.util.ArrayList;
@@ -16,7 +16,6 @@ import java.util.Map;
  */
 public class BukkitArmorStandManager implements ArmorStandManager {
 
-    private final NameTagX nameTagX;
     //map of registered armor stands
     private final Map<String, ArmorStand> armorStands = new LinkedHashMap<>();
 
@@ -29,14 +28,13 @@ public class BukkitArmorStandManager implements ArmorStandManager {
     private TabPlayer[] nearbyPlayerArray = new TabPlayer[0];
 
     public BukkitArmorStandManager(NameTagX nameTagX, TabPlayer owner) {
-        this.nameTagX = nameTagX;
         owner.setProperty(nameTagX, TabConstants.Property.NAMETAG, owner.getProperty(TabConstants.Property.TAGPREFIX).getCurrentRawValue()
                 + owner.getProperty(TabConstants.Property.CUSTOMTAGNAME).getCurrentRawValue()
                 + owner.getProperty(TabConstants.Property.TAGSUFFIX).getCurrentRawValue());
         double height = 0;
         for (String line : nameTagX.getDynamicLines()) {
             addArmorStand(line, new BukkitArmorStand(this, owner, line, height, false));
-            height += nameTagX.getSpaceBetweenLines();
+            height += 0.26;
         }
         for (Map.Entry<String, Object> line : nameTagX.getStaticLines().entrySet()) {
             addArmorStand(line.getKey(), new BukkitArmorStand(this, owner, line.getKey(), Double.parseDouble(line.getValue().toString()), true));
@@ -54,6 +52,13 @@ public class BukkitArmorStandManager implements ArmorStandManager {
         for (ArmorStand a : armorStandArray) a.teleport(viewer);
     }
 
+    /**
+     * Teleports armor stands to player's current location for all nearby players
+     */
+    public void teleport() {
+        for (ArmorStand a : armorStandArray) a.teleport();
+    }
+
     /**
      * Returns array of nearby players
      * @return array of nearby players
@@ -99,13 +104,6 @@ public class BukkitArmorStandManager implements ArmorStandManager {
         for (ArmorStand a : armorStandArray) a.sneak(sneaking);
     }
 
-    /**
-     * Teleports armor stands to player's current location for all nearby players
-     */
-    public void teleport() {
-        for (ArmorStand a : armorStandArray) a.teleport();
-    }
-
     /**
      * Performs respawn operation on all armor stands to skip teleport animation
      */
@@ -130,26 +128,15 @@ public class BukkitArmorStandManager implements ArmorStandManager {
         for (ArmorStand a : armorStandArray) a.spawn(viewer);
     }
 
-    /**
-     * Sends destroy packet of all armor stands to specified player and removes them from nearby players list
-     *
-     * @param   viewer
-     *          player to destroy armor stands for
-     */
-    public void destroy(TabPlayer viewer) {
-        for (ArmorStand a : armorStandArray) a.destroy(viewer);
-        unregisterPlayer(viewer);
-    }
-
     /**
      * Fixes heights of all armor stands due to dynamic lines
      */
     public void fixArmorStandHeights() {
-        double currentY = -nameTagX.getSpaceBetweenLines();
+        double currentY = -0.26;
         for (ArmorStand as : armorStandArray) {
             if (as.hasStaticOffset()) continue;
             if (as.getProperty().get().length() != 0) {
-                currentY += nameTagX.getSpaceBetweenLines();
+                currentY += 0.26;
                 as.setOffset(currentY);
             }
         }
@@ -169,30 +156,6 @@ public class BukkitArmorStandManager implements ArmorStandManager {
         for (TabPlayer p : nearbyPlayerArray) as.spawn(p);
     }
 
-    /**
-     * Gets armor stand by name
-     *
-     * @param   name
-     *          Name to get armor stand by
-     * @return  Armor stand with given name or null if not found
-     */
-    public ArmorStand getArmorStand(String name) {
-        return armorStands.get(name);
-    }
-
-    /**
-     * Removes armor stand by given name if exists
-     *
-     * @param   name
-     *          Name of line to remove
-     */
-    public void removeArmorStand(String name) {
-        if (!armorStands.containsKey(name)) return;
-        armorStands.get(name).destroy();
-        armorStands.remove(name);
-        armorStandArray = armorStands.values().toArray(new ArmorStand[0]);
-    }
-
     /**
      * Removes specified player from list of nearby players
      *
@@ -207,6 +170,17 @@ public class BukkitArmorStandManager implements ArmorStandManager {
         for (ArmorStand a : armorStandArray) a.updateVisibility(force);
     }
 
+    /**
+     * Sends destroy packet of all armor stands to specified player and removes them from nearby players list
+     *
+     * @param   viewer
+     *          player to destroy armor stands for
+     */
+    public void destroy(TabPlayer viewer) {
+        for (ArmorStand a : armorStandArray) a.destroy(viewer);
+        unregisterPlayer(viewer);
+    }
+
     @Override
     public void destroy() {
         for (ArmorStand a : armorStandArray) a.destroy();

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

@@ -1,8 +1,8 @@
 package me.neznamy.tab.platforms.bukkit.features.unlimitedtags;
 
+import me.neznamy.tab.api.TabAPI;
+import me.neznamy.tab.api.TabConstants;
 import me.neznamy.tab.api.TabPlayer;
-import me.neznamy.tab.shared.TAB;
-import me.neznamy.tab.shared.TabConstants;
 import me.neznamy.tab.shared.features.nametags.unlimited.NameTagX;
 import org.bukkit.Bukkit;
 import org.bukkit.Location;
@@ -29,16 +29,16 @@ public class BukkitNameTagX extends NameTagX {
     public BukkitNameTagX(JavaPlugin plugin) {
         super(BukkitArmorStandManager::new);
         Bukkit.getPluginManager().registerEvents(eventListener, plugin);
-        TAB.getInstance().getFeatureManager().registerFeature(TabConstants.Feature.UNLIMITED_NAME_TAGS_PACKET_LISTENER, new PacketListener(this));
-        TAB.getInstance().getFeatureManager().registerFeature(TabConstants.Feature.UNLIMITED_NAME_TAGS_VEHICLE_REFRESHER, vehicleManager);
+        TabAPI.getInstance().getFeatureManager().registerFeature(TabConstants.Feature.UNLIMITED_NAME_TAGS_PACKET_LISTENER, new PacketListener(this));
+        TabAPI.getInstance().getFeatureManager().registerFeature(TabConstants.Feature.UNLIMITED_NAME_TAGS_VEHICLE_REFRESHER, vehicleManager);
     }
 
     @Override
     public void load() {
         super.load();
-        for (TabPlayer all : TAB.getInstance().getOnlinePlayers()) {
+        for (TabPlayer all : TabAPI.getInstance().getOnlinePlayers()) {
             if (isPlayerDisabled(all)) continue;
-            for (TabPlayer viewer : TAB.getInstance().getOnlinePlayers()) {
+            for (TabPlayer viewer : TabAPI.getInstance().getOnlinePlayers()) {
                 spawnArmorStands(viewer, all);
             }
         }
@@ -46,9 +46,9 @@ public class BukkitNameTagX extends NameTagX {
     }
 
     private void startVisibilityRefreshTask() {
-        TAB.getInstance().getCPUManager().startRepeatingMeasuredTask(500, this, TabConstants.CpuUsageCategory.REFRESHING_NAME_TAG_VISIBILITY, () -> {
+        TabAPI.getInstance().getThreadManager().startRepeatingMeasuredTask(500, this, TabConstants.CpuUsageCategory.REFRESHING_NAME_TAG_VISIBILITY, () -> {
 
-            for (TabPlayer p : TAB.getInstance().getOnlinePlayers()) {
+            for (TabPlayer p : TabAPI.getInstance().getOnlinePlayers()) {
                 if (isPlayerDisabled(p)) continue;
                 getArmorStandManager(p).updateVisibility(false);
             }
@@ -65,7 +65,7 @@ public class BukkitNameTagX extends NameTagX {
     public void onJoin(TabPlayer connectedPlayer) {
         super.onJoin(connectedPlayer);
         if (isPlayerDisabled(connectedPlayer)) return;
-        for (TabPlayer viewer : TAB.getInstance().getOnlinePlayers()) {
+        for (TabPlayer viewer : TabAPI.getInstance().getOnlinePlayers()) {
             spawnArmorStands(viewer, connectedPlayer);
             spawnArmorStands(connectedPlayer, viewer);
         }
@@ -77,6 +77,7 @@ public class BukkitNameTagX extends NameTagX {
     }
 
     private void spawnArmorStands(TabPlayer viewer, TabPlayer target) {
+        if (viewer.getVersion().getMinorVersion() < 8) return;
         if (target == viewer || isPlayerDisabled(target)) return;
         if (((Player) viewer.getPlayer()).getWorld() != ((Player) target.getPlayer()).getWorld()) return;
         if (getDistance(viewer, target) <= 48 && ((Player)viewer.getPlayer()).canSee((Player)target.getPlayer()) && !target.isVanished())
@@ -95,7 +96,7 @@ public class BukkitNameTagX extends NameTagX {
     @Override
     public void resumeArmorStands(TabPlayer player) {
         if (isPlayerDisabled(player)) return;
-        for (TabPlayer viewer : TAB.getInstance().getOnlinePlayers()) {
+        for (TabPlayer viewer : TabAPI.getInstance().getOnlinePlayers()) {
             spawnArmorStands(viewer, player);
         }
     }
@@ -107,7 +108,7 @@ public class BukkitNameTagX extends NameTagX {
 
     @Override
     public void updateNameTagVisibilityView(TabPlayer player) {
-        for (TabPlayer all : TAB.getInstance().getOnlinePlayers()) {
+        for (TabPlayer all : TabAPI.getInstance().getOnlinePlayers()) {
             getArmorStandManager(all).updateVisibility(true);
         }
     }
@@ -115,7 +116,7 @@ public class BukkitNameTagX extends NameTagX {
     @Override
     public void onQuit(TabPlayer disconnectedPlayer) {
         super.onQuit(disconnectedPlayer);
-        for (TabPlayer all : TAB.getInstance().getOnlinePlayers()) {
+        for (TabPlayer all : TabAPI.getInstance().getOnlinePlayers()) {
             getArmorStandManager(all).unregisterPlayer(disconnectedPlayer);
         }
         armorStandManagerMap.get(disconnectedPlayer).destroy();
@@ -134,6 +135,12 @@ public class BukkitNameTagX extends NameTagX {
         if (isPreviewingNametag(p)) {
             getArmorStandManager(p).spawn(p);
         }
+        //for some reason this is needed for some users
+        for (TabPlayer viewer : TabAPI.getInstance().getOnlinePlayers()) {
+            if (viewer.getWorld().equals(from)) {
+                getArmorStandManager(p).destroy(viewer);
+            }
+        }
     }
 
     /**

bukkit/src/main/java/me/neznamy/tab/platforms/bukkit/features/unlimitedtags/EventListener.java

@@ -1,15 +1,14 @@
 package me.neznamy.tab.platforms.bukkit.features.unlimitedtags;
 
+import me.neznamy.tab.api.TabAPI;
+import me.neznamy.tab.api.TabConstants;
+import me.neznamy.tab.api.TabPlayer;
 import org.bukkit.event.EventHandler;
 import org.bukkit.event.EventPriority;
 import org.bukkit.event.Listener;
 import org.bukkit.event.player.PlayerRespawnEvent;
 import org.bukkit.event.player.PlayerToggleSneakEvent;
 
-import me.neznamy.tab.api.TabPlayer;
-import me.neznamy.tab.shared.TabConstants;
-import me.neznamy.tab.shared.TAB;
-
 /**
  * The event listener part for securing proper functionality of armor stands
  */
@@ -36,9 +35,9 @@ public class EventListener implements Listener {
      */
     @EventHandler(priority = EventPriority.MONITOR, ignoreCancelled = true)
     public void onSneak(PlayerToggleSneakEvent e) {
-        TabPlayer p = TAB.getInstance().getPlayer(e.getPlayer().getUniqueId());
+        TabPlayer p = TabAPI.getInstance().getPlayer(e.getPlayer().getUniqueId());
         if (p == null || feature.isPlayerDisabled(p)) return;
-        TAB.getInstance().getCPUManager().runMeasuredTask(feature, TabConstants.CpuUsageCategory.PLAYER_SNEAK, () -> feature.getArmorStandManager(p).sneak(e.isSneaking()));
+        TabAPI.getInstance().getThreadManager().runMeasuredTask(feature, TabConstants.CpuUsageCategory.PLAYER_SNEAK, () -> feature.getArmorStandManager(p).sneak(e.isSneaking()));
     }
 
     /**
@@ -49,8 +48,8 @@ public class EventListener implements Listener {
      */
     @EventHandler
     public void onRespawn(PlayerRespawnEvent e) {
-        TAB.getInstance().getCPUManager().runMeasuredTask(feature, TabConstants.CpuUsageCategory.PLAYER_RESPAWN, () -> {
-            TabPlayer respawned = TAB.getInstance().getPlayer(e.getPlayer().getUniqueId());
+        TabAPI.getInstance().getThreadManager().runMeasuredTask(feature, TabConstants.CpuUsageCategory.PLAYER_RESPAWN, () -> {
+            TabPlayer respawned = TabAPI.getInstance().getPlayer(e.getPlayer().getUniqueId());
             if (feature.isPlayerDisabled(respawned)) return;
             feature.getArmorStandManager(respawned).teleport();
         });

bukkit/src/main/java/me/neznamy/tab/platforms/bukkit/features/unlimitedtags/PacketListener.java

@@ -1,18 +1,17 @@
 package me.neznamy.tab.platforms.bukkit.features.unlimitedtags;
 
+import me.neznamy.tab.api.TabAPI;
+import me.neznamy.tab.api.TabConstants;
+import me.neznamy.tab.api.TabFeature;
+import me.neznamy.tab.api.TabPlayer;
+import me.neznamy.tab.platforms.bukkit.nms.NMSStorage;
+import org.bukkit.entity.Entity;
+import org.bukkit.entity.Player;
+
 import java.util.List;
 import java.util.Map;
 import java.util.concurrent.ConcurrentHashMap;
 
-import org.bukkit.entity.Entity;
-import org.bukkit.entity.Player;
-
-import me.neznamy.tab.api.TabFeature;
-import me.neznamy.tab.api.TabPlayer;
-import me.neznamy.tab.platforms.bukkit.nms.NMSStorage;
-import me.neznamy.tab.shared.TabConstants;
-import me.neznamy.tab.shared.TAB;
-
 /**
  * The packet listening part for securing proper functionality of armor stands
  * Bukkit events are too unreliable and delayed/ahead which causes de-sync
@@ -41,7 +40,7 @@ public class PacketListener extends TabFeature {
 
     @Override
     public void load() {
-        for (TabPlayer all : TAB.getInstance().getOnlinePlayers()) {
+        for (TabPlayer all : TabAPI.getInstance().getOnlinePlayers()) {
             entityIdMap.put(((Player) all.getPlayer()).getEntityId(), all);
         }
     }
@@ -61,7 +60,7 @@ public class PacketListener extends TabFeature {
         if (sender.getVersion().getMinorVersion() == 8 && nms.PacketPlayInUseEntity.isInstance(packet)) {
             int entityId = nms.PacketPlayInUseEntity_ENTITY.getInt(packet);
             TabPlayer attacked = null;
-            for (TabPlayer all : TAB.getInstance().getOnlinePlayers()) {
+            for (TabPlayer all : TabAPI.getInstance().getOnlinePlayers()) {
                 if (all.isLoaded() && nameTagX.getArmorStandManager(all).hasArmorStandWithID(entityId)) {
                     attacked = all;
                     break;
@@ -114,14 +113,14 @@ public class PacketListener extends TabFeature {
         if (pl != null) {
             //player moved
             if (nameTagX.isPlayerDisabled(pl) || !pl.isLoaded()) return;
-            TAB.getInstance().getCPUManager().runMeasuredTask(nameTagX, TabConstants.CpuUsageCategory.PACKET_ENTITY_MOVE,
+            TabAPI.getInstance().getThreadManager().runMeasuredTask(nameTagX, TabConstants.CpuUsageCategory.PACKET_ENTITY_MOVE,
                     () -> nameTagX.getArmorStandManager(pl).teleport(receiver));
         } else if ((vehicleList = nameTagX.getVehicleManager().getVehicles().get(entityId)) != null){
             //a vehicle carrying something moved
             for (Entity entity : vehicleList) {
                 TabPlayer passenger = entityIdMap.get(entity.getEntityId());
                 if (passenger != null && nameTagX.getArmorStandManager(passenger) != null) {
-                    TAB.getInstance().getCPUManager().runMeasuredTask(nameTagX, TabConstants.CpuUsageCategory.PACKET_ENTITY_MOVE_PASSENGER,
+                    TabAPI.getInstance().getThreadManager().runMeasuredTask(nameTagX, TabConstants.CpuUsageCategory.PACKET_ENTITY_MOVE_PASSENGER,
                             () -> nameTagX.getArmorStandManager(passenger).teleport(receiver));
                 }
             }
@@ -131,7 +130,7 @@ public class PacketListener extends TabFeature {
     private void onEntitySpawn(TabPlayer receiver, int entityId) {
         TabPlayer spawnedPlayer = entityIdMap.get(entityId);
         if (spawnedPlayer != null && spawnedPlayer.isLoaded() && !nameTagX.isPlayerDisabled(spawnedPlayer)) {
-            TAB.getInstance().getCPUManager().runMeasuredTask(nameTagX, TabConstants.CpuUsageCategory.PACKET_ENTITY_SPAWN,
+            TabAPI.getInstance().getThreadManager().runMeasuredTask(nameTagX, TabConstants.CpuUsageCategory.PACKET_ENTITY_SPAWN,
                     () -> nameTagX.getArmorStandManager(spawnedPlayer).spawn(receiver));
         }
     }
@@ -152,7 +151,7 @@ public class PacketListener extends TabFeature {
         TabPlayer deSpawnedPlayer = entityIdMap.get(entity);
         if (deSpawnedPlayer != null && deSpawnedPlayer.isLoaded() && !nameTagX.isPlayerDisabled(deSpawnedPlayer)) {
             BukkitArmorStandManager asm = nameTagX.getArmorStandManager(deSpawnedPlayer);
-            TAB.getInstance().getCPUManager().runMeasuredTask(nameTagX, TabConstants.CpuUsageCategory.PACKET_ENTITY_DESTROY,
+            TabAPI.getInstance().getThreadManager().runMeasuredTask(nameTagX, TabConstants.CpuUsageCategory.PACKET_ENTITY_DESTROY,
                     () -> asm.destroy(receiver));
         }
     }

bukkit/src/main/java/me/neznamy/tab/platforms/bukkit/features/unlimitedtags/VehicleRefresher.java

@@ -1,17 +1,15 @@
 package me.neznamy.tab.platforms.bukkit.features.unlimitedtags;
 
+import me.neznamy.tab.api.TabAPI;
+import me.neznamy.tab.api.TabConstants;
+import me.neznamy.tab.api.TabFeature;
+import me.neznamy.tab.api.TabPlayer;
+import org.bukkit.entity.Entity;
+import org.bukkit.entity.Player;
+
 import java.util.*;
 import java.util.concurrent.ConcurrentHashMap;
 
-import me.neznamy.tab.shared.TabConstants;
-import org.bukkit.entity.Entity;
-import org.bukkit.entity.EntityType;
-import org.bukkit.entity.Player;
-
-import me.neznamy.tab.api.TabFeature;
-import me.neznamy.tab.api.TabPlayer;
-import me.neznamy.tab.shared.TAB;
-
 public class VehicleRefresher extends TabFeature {
 
     //map of players currently in a vehicle
@@ -28,31 +26,30 @@ public class VehicleRefresher extends TabFeature {
     public VehicleRefresher(BukkitNameTagX feature) {
         super(feature.getFeatureName(), "Refreshing vehicles");
         this.feature = feature;
-        TAB.getInstance().getCPUManager().startRepeatingMeasuredTask(50,
+        TabAPI.getInstance().getThreadManager().startRepeatingMeasuredTask(50,
                 this, TabConstants.CpuUsageCategory.PROCESSING_PLAYER_MOVEMENT, () -> {
                     for (TabPlayer inVehicle : playersInVehicle.keySet()) {
                         if (!inVehicle.isOnline() || feature.getArmorStandManager(inVehicle) == null) continue; // not removed from WeakHashMap yet
                         feature.getArmorStandManager(inVehicle).teleport();
-//                        feature.getVehicleManager().processPassengers((Entity) inVehicle.getPlayer());
                     }
-                    for (TabPlayer p : TAB.getInstance().getOnlinePlayers()) {
+                    for (TabPlayer p : TabAPI.getInstance().getOnlinePlayers()) {
                         if (feature.isPreviewingNametag(p)) {
                             feature.getArmorStandManager(p).teleport(p);
                         }
                     }
         });
-        addUsedPlaceholders(Collections.singletonList("%vehicle%"));
-        TAB.getInstance().getPlaceholderManager().registerPlayerPlaceholder("%vehicle%", 100, p -> ((Player)p.getPlayer()).getVehicle() == null ? "" : ((Player)p.getPlayer()).getVehicle());
+        addUsedPlaceholders(Collections.singletonList(TabConstants.Placeholder.VEHICLE));
+        TabAPI.getInstance().getPlaceholderManager().registerPlayerPlaceholder(TabConstants.Placeholder.VEHICLE, 100, p -> ((Player)p.getPlayer()).getVehicle() == null ? "" : ((Player)p.getPlayer()).getVehicle());
     }
 
     @Override
     public void load() {
-        for (TabPlayer p : TAB.getInstance().getOnlinePlayers()) {
+        for (TabPlayer p : TabAPI.getInstance().getOnlinePlayers()) {
             Entity vehicle = ((Player)p.getPlayer()).getVehicle();
             if (vehicle != null) {
                 vehicles.put(vehicle.getEntityId(), getPassengers(vehicle));
                 playersInVehicle.put(p, vehicle);
-                if (feature.isDisableOnBoats() && vehicle.getType() == EntityType.BOAT) {
+                if (feature.isDisableOnBoats() && vehicle.getType().toString().contains("BOAT")) {
                     playersOnBoats.add(p);
                 }
             }
@@ -92,7 +89,7 @@ public class VehicleRefresher extends TabFeature {
             vehicles.put(vehicle.getEntityId(), getPassengers(vehicle));
             feature.getArmorStandManager(p).respawn(); //making teleport instant instead of showing teleport animation
             playersInVehicle.put(p, vehicle);
-            if (feature.isDisableOnBoats() && vehicle.getType() == EntityType.BOAT) {
+            if (feature.isDisableOnBoats() && vehicle.getType().toString().contains("BOAT")) {
                 playersOnBoats.add(p);
                 feature.updateTeamData(p);
             }
@@ -116,7 +113,7 @@ public class VehicleRefresher extends TabFeature {
      */
     @SuppressWarnings("deprecation")
     public List<Entity> getPassengers(Entity vehicle){
-        if (TAB.getInstance().getServerVersion().getMinorVersion() >= 11) {
+        if (TabAPI.getInstance().getServerVersion().getMinorVersion() >= 11) {
             return vehicle.getPassengers();
         } else {
             if (vehicle.getPassenger() != null) {
@@ -126,19 +123,4 @@ public class VehicleRefresher extends TabFeature {
             }
         }
     }
-
-    /**
-     * Teleports armor stands of all passengers on specified vehicle
-     *
-     * @param   vehicle
-     *          entity to check passengers of
-     */
-    public void processPassengers(Entity vehicle) {
-        for (Entity passenger : getPassengers(vehicle)) {
-            if (passenger instanceof Player) {
-                feature.getArmorStandManager(TAB.getInstance().getPlayer(passenger.getUniqueId())).teleport();
-            }
-            processPassengers(passenger);
-        }
-    }
 }

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

@@ -0,0 +1,102 @@
+package me.neznamy.tab.platforms.bukkit.nms;
+
+/**
+ * NMS loader for minecraft 1.17+ using Mojang packaging and bukkit names.
+ */
+public class BukkitModernNMSStorage extends ModernNMSStorage {
+
+    /**
+     * Creates new instance, initializes required NMS classes and fields
+     *
+     * @throws  ReflectiveOperationException
+     *          If any class, field or method fails to load
+     */
+    public BukkitModernNMSStorage() throws ReflectiveOperationException {
+    }
+
+    @Override
+    public void loadNamedFieldsAndMethods() throws ReflectiveOperationException {
+        PING = getField(EntityPlayer, "e");
+        ChatSerializer_DESERIALIZE = getMethod(ChatSerializer, "a", String.class);
+        DataWatcher_REGISTER = getMethod(DataWatcher, new String[]{"register", "a"}, DataWatcherObject, Object.class); // {Bukkit, Bukkit 1.18+}
+        ScoreboardScore_setScore = getMethod(ScoreboardScore, new String[]{"setScore", "b"}, int.class); // {Bukkit, Bukkit 1.18+}
+        ScoreboardTeam_setAllowFriendlyFire = getMethod(ScoreboardTeam, new String[]{"setAllowFriendlyFire", "a"}, boolean.class); // {Bukkit, Bukkit 1.18+}
+        ScoreboardTeam_setCanSeeFriendlyInvisibles = getMethod(ScoreboardTeam, new String[]{"setCanSeeFriendlyInvisibles", "b"}, boolean.class); // {Bukkit, Bukkit 1.18+}
+        ScoreboardTeam_setPrefix = getMethod(ScoreboardTeam, new String[]{"setPrefix", "b"}, IChatBaseComponent); // {Bukkit, Bukkit 1.18+}
+        ScoreboardTeam_setSuffix = getMethod(ScoreboardTeam, new String[]{"setSuffix", "c"}, IChatBaseComponent); // {Bukkit, Bukkit 1.18+}
+        ScoreboardTeam_setNameTagVisibility = getMethod(ScoreboardTeam, new String[]{"setNameTagVisibility", "a"}, EnumNameTagVisibility); // {Bukkit, Bukkit 1.18+}
+        if (minorVersion >= 19) {
+            Registry_a = Registry.getMethod("a", int.class);
+            IRegistry_X = IRegistry.getDeclaredField("X").get(null);
+            PacketPlayOutSpawnEntityLiving_ENTITYTYPE = getField(PacketPlayOutSpawnEntityLiving, "e");
+        }
+    }
+
+    @Override
+    public void loadClasses() throws ClassNotFoundException {
+        ChatSerializer = Class.forName("net.minecraft.network.chat.IChatBaseComponent$ChatSerializer");
+        World = Class.forName("net.minecraft.world.level.World");
+        EntityArmorStand = Class.forName("net.minecraft.world.entity.decoration.EntityArmorStand");
+        EntityHuman = Class.forName("net.minecraft.world.entity.player.EntityHuman");
+        NetworkManager = Class.forName("net.minecraft.network.NetworkManager");
+        IChatBaseComponent = Class.forName("net.minecraft.network.chat.IChatBaseComponent");
+        Packet = Class.forName("net.minecraft.network.protocol.Packet");
+        EnumChatFormat = Class.forName("net.minecraft.EnumChatFormat");
+        EntityPlayer = Class.forName("net.minecraft.server.level.EntityPlayer");
+        Entity = Class.forName("net.minecraft.world.entity.Entity");
+        EntityLiving = Class.forName("net.minecraft.world.entity.EntityLiving");
+        PlayerConnection = Class.forName("net.minecraft.server.network.PlayerConnection");
+        PacketPlayOutPlayerListHeaderFooter = Class.forName("net.minecraft.network.protocol.game.PacketPlayOutPlayerListHeaderFooter");
+        PacketPlayOutChat = getModernClass("net.minecraft.network.protocol.game.ClientboundSystemChatPacket",
+                "net.minecraft.network.protocol.game.PacketPlayOutChat");
+        if (minorVersion < 19) {
+            ChatMessageType = Class.forName("net.minecraft.network.chat.ChatMessageType");
+        }
+
+        // DataWatcher
+        DataWatcher = Class.forName("net.minecraft.network.syncher.DataWatcher");
+        DataWatcherItem = Class.forName("net.minecraft.network.syncher.DataWatcher$Item");
+        DataWatcherObject = Class.forName("net.minecraft.network.syncher.DataWatcherObject");
+        DataWatcherRegistry = Class.forName("net.minecraft.network.syncher.DataWatcherRegistry");
+        DataWatcherSerializer = Class.forName("net.minecraft.network.syncher.DataWatcherSerializer");
+
+        // Entities
+        PacketPlayOutSpawnEntityLiving = getModernClass("net.minecraft.network.protocol.game.PacketPlayOutSpawnEntityLiving",
+                "net.minecraft.network.protocol.game.PacketPlayOutSpawnEntity");
+        PacketPlayOutEntityTeleport = Class.forName("net.minecraft.network.protocol.game.PacketPlayOutEntityTeleport");
+        PacketPlayInUseEntity = Class.forName("net.minecraft.network.protocol.game.PacketPlayInUseEntity");
+        PacketPlayInUseEntity$d = Class.forName("net.minecraft.network.protocol.game.PacketPlayInUseEntity$d");
+        PacketPlayOutEntity = Class.forName("net.minecraft.network.protocol.game.PacketPlayOutEntity");
+        PacketPlayOutEntityDestroy = Class.forName("net.minecraft.network.protocol.game.PacketPlayOutEntityDestroy");
+        PacketPlayOutEntityLook = Class.forName("net.minecraft.network.protocol.game.PacketPlayOutEntity$PacketPlayOutEntityLook");
+        PacketPlayOutEntityMetadata = Class.forName("net.minecraft.network.protocol.game.PacketPlayOutEntityMetadata");
+        PacketPlayOutNamedEntitySpawn = Class.forName("net.minecraft.network.protocol.game.PacketPlayOutNamedEntitySpawn");
+        EnumEntityUseAction = Class.forName("net.minecraft.network.protocol.game.PacketPlayInUseEntity$EnumEntityUseAction");
+        if (minorVersion >= 19) {
+            Registry = Class.forName("net.minecraft.core.Registry");
+            IRegistry = Class.forName("net.minecraft.core.IRegistry");
+        }
+
+        // Player Info
+        PacketPlayOutPlayerInfo = Class.forName("net.minecraft.network.protocol.game.PacketPlayOutPlayerInfo");
+        EnumPlayerInfoAction = Class.forName("net.minecraft.network.protocol.game.PacketPlayOutPlayerInfo$EnumPlayerInfoAction");
+        PlayerInfoData = Class.forName("net.minecraft.network.protocol.game.PacketPlayOutPlayerInfo$PlayerInfoData");
+        EnumGamemode = Class.forName("net.minecraft.world.level.EnumGamemode");
+
+        // Scoreboard
+        PacketPlayOutScoreboardDisplayObjective = Class.forName("net.minecraft.network.protocol.game.PacketPlayOutScoreboardDisplayObjective");
+        PacketPlayOutScoreboardObjective = Class.forName("net.minecraft.network.protocol.game.PacketPlayOutScoreboardObjective");
+        Scoreboard = Class.forName("net.minecraft.world.scores.Scoreboard");
+        PacketPlayOutScoreboardScore = Class.forName("net.minecraft.network.protocol.game.PacketPlayOutScoreboardScore");
+        ScoreboardObjective = Class.forName("net.minecraft.world.scores.ScoreboardObjective");
+        ScoreboardScore = Class.forName("net.minecraft.world.scores.ScoreboardScore");
+        IScoreboardCriteria = Class.forName("net.minecraft.world.scores.criteria.IScoreboardCriteria");
+        EnumScoreboardHealthDisplay = Class.forName("net.minecraft.world.scores.criteria.IScoreboardCriteria$EnumScoreboardHealthDisplay");
+        EnumScoreboardAction = Class.forName("net.minecraft.server.ScoreboardServer$Action");
+        PacketPlayOutScoreboardTeam = Class.forName("net.minecraft.network.protocol.game.PacketPlayOutScoreboardTeam");
+        ScoreboardTeam = Class.forName("net.minecraft.world.scores.ScoreboardTeam");
+        EnumNameTagVisibility = Class.forName("net.minecraft.world.scores.ScoreboardTeamBase$EnumNameTagVisibility");
+        EnumTeamPush = Class.forName("net.minecraft.world.scores.ScoreboardTeamBase$EnumTeamPush");
+        PacketPlayOutScoreboardTeam_PlayerAction = Class.forName("net.minecraft.network.protocol.game.PacketPlayOutScoreboardTeam$a");
+    }
+}

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

@@ -0,0 +1,164 @@
+package me.neznamy.tab.platforms.bukkit.nms;
+
+import me.neznamy.tab.platforms.bukkit.Main;
+
+import java.util.Arrays;
+
+/**
+ * NMS loader for Minecraft 1.16.5 and lower using old NMS class structure.
+ */
+public class LegacyNMSStorage extends NMSStorage {
+
+    /**
+     * Creates new instance, initializes required NMS classes and fields
+     *
+     * @throws  ReflectiveOperationException
+     *          If any class, field or method fails to load
+     */
+    public LegacyNMSStorage() throws ReflectiveOperationException {
+    }
+
+    /**
+     * 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(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
+     *
+     * @param   name
+     *          class name
+     * @return  class from given name
+     * @throws  ClassNotFoundException
+     *          if class was not found
+     */
+    private Class<?> getLegacyClass(String name) throws ClassNotFoundException {
+        try {
+            return Class.forName("net.minecraft.server." + serverPackage + "." + name);
+        } catch (ClassNotFoundException | NullPointerException e) {
+            try {
+                //modded server?
+                Class<?> clazz = Main.class.getClassLoader().loadClass("net.minecraft.server." + serverPackage + "." + name);
+                if (clazz != null) return clazz;
+            } catch (NullPointerException ignored) {}
+            throw new ClassNotFoundException(name);
+        }
+    }
+
+    @Override
+    public void loadNamedFieldsAndMethods() throws ReflectiveOperationException {
+        PING = getField(EntityPlayer, "ping", "field_71138_i"); // {Bukkit, Thermos}
+        ScoreboardScore_setScore = getMethod(ScoreboardScore, new String[]{"setScore", "func_96647_c"}, int.class); // {Bukkit, Thermos}
+        ScoreboardTeam_setAllowFriendlyFire = getMethod(ScoreboardTeam,
+                new String[]{"setAllowFriendlyFire", "func_96660_a"}, boolean.class); // {Bukkit, Thermos}
+        ScoreboardTeam_setCanSeeFriendlyInvisibles = getMethod(ScoreboardTeam,
+                new String[]{"setCanSeeFriendlyInvisibles", "func_98300_b"}, boolean.class); // {Bukkit, Thermos}
+        if (minorVersion >= 7) {
+            ChatSerializer_DESERIALIZE = getMethod(ChatSerializer, new String[]{"a", "func_150699_a"}, String.class); // {Bukkit, Thermos}
+        }
+        if (minorVersion >= 8) {
+            ScoreboardTeam_setNameTagVisibility = getMethod(ScoreboardTeam, "setNameTagVisibility", EnumNameTagVisibility);
+        }
+        if (minorVersion >= 9) {
+            DataWatcher_REGISTER = getMethod(DataWatcher, "register", DataWatcherObject, Object.class);
+        } else {
+            DataWatcher_REGISTER = getMethod(DataWatcher, new String[]{"a", "func_75682_a"}, int.class, Object.class); // {Bukkit, Thermos}
+        }
+        if (minorVersion >= 13) {
+            ScoreboardTeam_setPrefix = getMethod(ScoreboardTeam, "setPrefix", IChatBaseComponent);
+            ScoreboardTeam_setSuffix = getMethod(ScoreboardTeam, "setSuffix", IChatBaseComponent);
+        } else {
+            ScoreboardTeam_setPrefix = getMethod(ScoreboardTeam, new String[]{"setPrefix", "func_96666_b"}, String.class); // {Bukkit, Thermos}
+            ScoreboardTeam_setSuffix = getMethod(ScoreboardTeam, new String[]{"setSuffix", "func_96662_c"}, String.class); // {Bukkit, Thermos}
+        }
+    }
+
+    @Override
+    public void loadClasses() throws ClassNotFoundException {
+        EntityHuman = getLegacyClass("EntityHuman");
+        World = getLegacyClass("World");
+        Packet = getLegacyClass("Packet");
+        EnumChatFormat = getLegacyClass("EnumChatFormat");
+        EntityPlayer = getLegacyClass("EntityPlayer");
+        Entity = getLegacyClass("Entity");
+        EntityLiving = getLegacyClass("EntityLiving");
+        PlayerConnection = getLegacyClass("PlayerConnection");
+        PacketPlayOutChat = getLegacyClass("PacketPlayOutChat", "Packet3Chat");
+        NetworkManager = getLegacyClass("NetworkManager");
+        if (minorVersion >= 7) {
+            IChatBaseComponent = getLegacyClass("IChatBaseComponent");
+            ChatSerializer = getLegacyClass("IChatBaseComponent$ChatSerializer", "ChatSerializer");
+        }
+        if (minorVersion >= 8) {
+            PacketPlayOutPlayerListHeaderFooter = getLegacyClass("PacketPlayOutPlayerListHeaderFooter");
+            EntityArmorStand = getLegacyClass("EntityArmorStand");
+        }
+        if (minorVersion >= 12) {
+            ChatMessageType = getLegacyClass("ChatMessageType");
+        }
+
+        // DataWatcher
+        DataWatcher = getLegacyClass("DataWatcher");
+        DataWatcherItem = getLegacyClass("DataWatcher$Item", "DataWatcher$WatchableObject", "WatchableObject");
+        if (minorVersion >= 9) {
+            DataWatcherObject = getLegacyClass("DataWatcherObject");
+            DataWatcherRegistry = getLegacyClass("DataWatcherRegistry");
+            DataWatcherSerializer = getLegacyClass("DataWatcherSerializer");
+        }
+
+        // Entities
+        PacketPlayOutSpawnEntityLiving = getLegacyClass("PacketPlayOutSpawnEntityLiving", "Packet24MobSpawn");
+        PacketPlayOutEntityTeleport = getLegacyClass("PacketPlayOutEntityTeleport", "Packet34EntityTeleport");
+        PacketPlayInUseEntity = getLegacyClass("PacketPlayInUseEntity", "Packet7UseEntity");
+        PacketPlayOutEntity = getLegacyClass("PacketPlayOutEntity", "Packet30Entity");
+        PacketPlayOutEntityDestroy = getLegacyClass("PacketPlayOutEntityDestroy", "Packet29DestroyEntity");
+        PacketPlayOutEntityLook = getLegacyClass("PacketPlayOutEntity$PacketPlayOutEntityLook", "PacketPlayOutEntityLook", "Packet32EntityLook");
+        PacketPlayOutEntityMetadata = getLegacyClass("PacketPlayOutEntityMetadata", "Packet40EntityMetadata");
+        PacketPlayOutNamedEntitySpawn = getLegacyClass("PacketPlayOutNamedEntitySpawn", "Packet20NamedEntitySpawn");
+        if (minorVersion >= 7) {
+            EnumEntityUseAction = getLegacyClass("PacketPlayInUseEntity$EnumEntityUseAction", "EnumEntityUseAction");
+        }
+
+        // Player Info
+        if (minorVersion >= 8) {
+            PacketPlayOutPlayerInfo = getLegacyClass("PacketPlayOutPlayerInfo");
+            EnumPlayerInfoAction = getLegacyClass("PacketPlayOutPlayerInfo$EnumPlayerInfoAction", "EnumPlayerInfoAction");
+            PlayerInfoData = getLegacyClass("PacketPlayOutPlayerInfo$PlayerInfoData", "PlayerInfoData");
+            EnumGamemode = getLegacyClass("EnumGamemode", "WorldSettings$EnumGamemode");
+        }
+
+        // Scoreboard
+        PacketPlayOutScoreboardDisplayObjective = getLegacyClass("PacketPlayOutScoreboardDisplayObjective", "Packet208SetScoreboardDisplayObjective");
+        PacketPlayOutScoreboardObjective = getLegacyClass("PacketPlayOutScoreboardObjective", "Packet206SetScoreboardObjective");
+        PacketPlayOutScoreboardTeam = getLegacyClass("PacketPlayOutScoreboardTeam", "Packet209SetScoreboardTeam");
+        PacketPlayOutScoreboardScore = getLegacyClass("PacketPlayOutScoreboardScore", "Packet207SetScoreboardScore");
+        Scoreboard = getLegacyClass("Scoreboard");
+        ScoreboardObjective = getLegacyClass("ScoreboardObjective");
+        ScoreboardScore = getLegacyClass("ScoreboardScore");
+        IScoreboardCriteria = getLegacyClass("IScoreboardCriteria");
+        ScoreboardTeam = getLegacyClass("ScoreboardTeam");
+        if (minorVersion >= 8) {
+            EnumScoreboardHealthDisplay = getLegacyClass("IScoreboardCriteria$EnumScoreboardHealthDisplay", "EnumScoreboardHealthDisplay");
+            EnumScoreboardAction = getLegacyClass("ScoreboardServer$Action", "PacketPlayOutScoreboardScore$EnumScoreboardAction", "EnumScoreboardAction");
+            EnumNameTagVisibility = getLegacyClass("ScoreboardTeamBase$EnumNameTagVisibility", "EnumNameTagVisibility");
+        }
+        if (minorVersion >= 9) {
+            EnumTeamPush = getLegacyClass("ScoreboardTeamBase$EnumTeamPush");
+        }
+    }
+}

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

@@ -0,0 +1,41 @@
+package me.neznamy.tab.platforms.bukkit.nms;
+
+import java.util.Arrays;
+
+/**
+ * NMS loader for minecraft 1.17+ using Mojang packaging.
+ */
+public abstract class ModernNMSStorage extends NMSStorage {
+
+    protected Class<?> IRegistry;
+    protected Class<?> Registry;
+
+    /**
+     * Creates new instance, initializes required NMS classes and fields
+     *
+     * @throws  ReflectiveOperationException
+     *          If any class, field or method fails to load
+     */
+    public ModernNMSStorage() throws ReflectiveOperationException {
+    }
+
+    /**
+     * 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
+     */
+    protected Class<?> getModernClass(String... names) throws ClassNotFoundException {
+        for (String name : names) {
+            try {
+                return Class.forName(name);
+            } catch (ClassNotFoundException e) {
+                //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/MojangModernNMSStorage.java

@@ -0,0 +1,102 @@
+package me.neznamy.tab.platforms.bukkit.nms;
+
+/**
+ * NMS loader for minecraft 1.17+ using Mojang packaging and names.
+ */
+public class MojangModernNMSStorage extends ModernNMSStorage {
+
+    /**
+     * Creates new instance, initializes required NMS classes and fields
+     *
+     * @throws  ReflectiveOperationException
+     *          If any class, field or method fails to load
+     */
+    public MojangModernNMSStorage() throws ReflectiveOperationException {
+    }
+
+    @Override
+    public void loadNamedFieldsAndMethods() throws ReflectiveOperationException {
+        PING = getField(EntityPlayer, "latency");
+        ChatSerializer_DESERIALIZE = getMethod(ChatSerializer, "fromJson", String.class);
+        DataWatcher_REGISTER = getMethod(DataWatcher, "define", DataWatcherObject, Object.class);
+        ScoreboardScore_setScore = getMethod(ScoreboardScore, "setScore", int.class);
+        ScoreboardTeam_setAllowFriendlyFire = getMethod(ScoreboardTeam, "setAllowFriendlyFire", boolean.class);
+        ScoreboardTeam_setCanSeeFriendlyInvisibles = getMethod(ScoreboardTeam, "setSeeFriendlyInvisibles", boolean.class);
+        ScoreboardTeam_setPrefix = getMethod(ScoreboardTeam, "setPlayerPrefix", IChatBaseComponent);
+        ScoreboardTeam_setSuffix = getMethod(ScoreboardTeam, "setPlayerSuffix", IChatBaseComponent);
+        ScoreboardTeam_setNameTagVisibility = getMethod(ScoreboardTeam, "setNameTagVisibility", EnumNameTagVisibility);
+        if (minorVersion >= 19) {
+            Registry_a = Registry.getMethod("byId", int.class);
+            IRegistry_X = IRegistry.getDeclaredField("ENTITY_TYPE").get(null);
+            PacketPlayOutSpawnEntityLiving_ENTITYTYPE = getField(PacketPlayOutSpawnEntityLiving, "type");
+        }
+    }
+
+    @Override
+    public void loadClasses() throws ClassNotFoundException {
+        IChatBaseComponent = Class.forName("net.minecraft.network.chat.Component");
+        ChatSerializer = Class.forName("net.minecraft.network.chat.Component$Serializer");
+        World = Class.forName("net.minecraft.world.level.Level");
+        EntityArmorStand = Class.forName("net.minecraft.world.entity.decoration.ArmorStand");
+        EntityHuman = Class.forName("net.minecraft.world.entity.player.Player");
+        NetworkManager = Class.forName("net.minecraft.network.Connection");
+        Packet = Class.forName("net.minecraft.network.protocol.Packet");
+        EnumChatFormat = Class.forName("net.minecraft.ChatFormatting");
+        EntityPlayer = Class.forName("net.minecraft.server.level.ServerPlayer");
+        Entity = Class.forName("net.minecraft.world.entity.Entity");
+        EntityLiving = Class.forName("net.minecraft.world.entity.LivingEntity");
+        PlayerConnection = Class.forName("net.minecraft.server.network.ServerGamePacketListenerImpl");
+        PacketPlayOutPlayerListHeaderFooter = Class.forName("net.minecraft.network.protocol.game.ClientboundTabListPacket");
+        PacketPlayOutChat = getModernClass("net.minecraft.network.protocol.game.ClientboundSystemChatPacket",
+                "net.minecraft.network.protocol.game.ClientboundChatPacket");
+        if (minorVersion < 19) {
+            ChatMessageType = Class.forName("net.minecraft.network.chat.ChatType");
+        }
+
+        // DataWatcher
+        DataWatcher = Class.forName("net.minecraft.network.syncher.SynchedEntityData");
+        DataWatcherItem = Class.forName("net.minecraft.network.syncher.SynchedEntityData$DataItem");
+        DataWatcherObject = Class.forName("net.minecraft.network.syncher.EntityDataAccessor");
+        DataWatcherRegistry = Class.forName("net.minecraft.network.syncher.EntityDataSerializers");
+        DataWatcherSerializer = Class.forName("net.minecraft.network.syncher.EntityDataSerializer");
+
+        // Entities
+        PacketPlayOutSpawnEntityLiving = getModernClass("net.minecraft.network.protocol.game.ClientboundAddMobPacket",
+                "net.minecraft.network.protocol.game.ClientboundAddEntityPacket");
+        PacketPlayOutEntityTeleport = Class.forName("net.minecraft.network.protocol.game.ClientboundTeleportEntityPacket");
+        PacketPlayInUseEntity = Class.forName("net.minecraft.network.protocol.game.ServerboundInteractPacket");
+        PacketPlayInUseEntity$d = Class.forName("net.minecraft.network.protocol.game.ServerboundInteractPacket$InteractionAction");
+        PacketPlayOutEntity = Class.forName("net.minecraft.network.protocol.game.ClientboundMoveEntityPacket");
+        PacketPlayOutEntityDestroy = Class.forName("net.minecraft.network.protocol.game.ClientboundRemoveEntitiesPacket");
+        PacketPlayOutEntityLook = Class.forName("net.minecraft.network.protocol.game.ClientboundMoveEntityPacket$Rot");
+        PacketPlayOutEntityMetadata = Class.forName("net.minecraft.network.protocol.game.ClientboundSetEntityDataPacket");
+        PacketPlayOutNamedEntitySpawn = Class.forName("net.minecraft.network.protocol.game.ClientboundAddPlayerPacket");
+        EnumEntityUseAction = Class.forName("net.minecraft.network.protocol.game.ServerboundInteractPacket$Action");
+        if (minorVersion >= 19) {
+            Registry = Class.forName("net.minecraft.core.IdMap");
+            IRegistry = Class.forName("net.minecraft.core.Registry");
+        }
+
+        // Player Info
+        PacketPlayOutPlayerInfo = Class.forName("net.minecraft.network.protocol.game.ClientboundPlayerInfoPacket");
+        EnumPlayerInfoAction = Class.forName("net.minecraft.network.protocol.game.ClientboundPlayerInfoPacket$Action");
+        PlayerInfoData = Class.forName("net.minecraft.network.protocol.game.ClientboundPlayerInfoPacket$PlayerUpdate");
+        EnumGamemode = Class.forName("net.minecraft.world.level.GameType");
+
+        // Scoreboard
+        PacketPlayOutScoreboardDisplayObjective = Class.forName("net.minecraft.network.protocol.game.ClientboundSetDisplayObjectivePacket");
+        PacketPlayOutScoreboardObjective = Class.forName("net.minecraft.network.protocol.game.ClientboundSetObjectivePacket");
+        Scoreboard = Class.forName("net.minecraft.world.scores.Scoreboard");
+        PacketPlayOutScoreboardScore = Class.forName("net.minecraft.network.protocol.game.ClientboundSetScorePacket");
+        ScoreboardObjective = Class.forName("net.minecraft.world.scores.Objective");
+        ScoreboardScore = Class.forName("net.minecraft.world.scores.Score");
+        IScoreboardCriteria = Class.forName("net.minecraft.world.scores.criteria.ObjectiveCriteria");
+        EnumScoreboardHealthDisplay = Class.forName("net.minecraft.world.scores.criteria.ObjectiveCriteria$RenderType");
+        EnumScoreboardAction = Class.forName("net.minecraft.server.ServerScoreboard$Method");
+        PacketPlayOutScoreboardTeam = Class.forName("net.minecraft.network.protocol.game.ClientboundSetPlayerTeamPacket");
+        ScoreboardTeam = Class.forName("net.minecraft.world.scores.PlayerTeam");
+        EnumNameTagVisibility = Class.forName("net.minecraft.world.scores.Team$Visibility");
+        EnumTeamPush = Class.forName("net.minecraft.world.scores.Team$CollisionRule");
+        PacketPlayOutScoreboardTeam_PlayerAction = Class.forName("net.minecraft.network.protocol.game.ClientboundSetPlayerTeamPacket$Action");
+    }
+}

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

@@ -1,166 +1,134 @@
 package me.neznamy.tab.platforms.bukkit.nms;
 
-import java.lang.reflect.AccessibleObject;
-import java.lang.reflect.Array;
-import java.lang.reflect.Constructor;
-import java.lang.reflect.Field;
-import java.lang.reflect.Method;
-import java.lang.reflect.Modifier;
-import java.util.ArrayList;
-import java.util.Arrays;
-import java.util.Collection;
-import java.util.List;
-import java.util.UUID;
-
-import org.bukkit.Bukkit;
-
-import com.google.gson.JsonElement;
-import com.google.gson.JsonObject;
 import com.mojang.authlib.GameProfile;
-
 import io.netty.channel.Channel;
 import me.neznamy.tab.api.ProtocolVersion;
-import me.neznamy.tab.platforms.bukkit.Main;
 import me.neznamy.tab.platforms.bukkit.nms.datawatcher.DataWatcherRegistry;
-import me.neznamy.tab.shared.TAB;
+import org.bukkit.Bukkit;
+
+import java.lang.reflect.*;
+import java.util.*;
 
 @SuppressWarnings("rawtypes")
-public final class NMSStorage {
+public abstract class NMSStorage {
 
     //instance of this class
     private static NMSStorage instance;
 
     //server package, such as "v1_16_R3"
-    private final String serverPackage = Bukkit.getServer().getClass().getPackage().getName().split("\\.")[3];
+    protected final String serverPackage = Bukkit.getServer().getClass().getPackage().getName().split("\\.")[3];
 
     //server minor version such as "16"
-    private final int minorVersion = Integer.parseInt(serverPackage.split("_")[1]);
+    protected final int minorVersion = Integer.parseInt(serverPackage.split("_")[1]);
 
     //another field due to fabric which uses 1.16 package on 1.17 server
     private final ProtocolVersion serverVersion = ProtocolVersion.fromFriendlyName(Bukkit.getBukkitVersion().split("-")[0]);
 
     //base
-    private final Class<?> Packet = getNMSClass("net.minecraft.network.protocol.Packet", "Packet");
-    public final Class<?> EnumChatFormat = getNMSClass("net.minecraft.EnumChatFormat", "EnumChatFormat");
-    public final Class<?> EntityPlayer = getNMSClass("net.minecraft.server.level.EntityPlayer", "EntityPlayer");
-    private final Class<?> Entity = getNMSClass("net.minecraft.world.entity.Entity", "Entity");
-    private final Class<?> EntityLiving = getNMSClass("net.minecraft.world.entity.EntityLiving", "EntityLiving");
-    private final Class<?> PlayerConnection = getNMSClass("net.minecraft.server.network.PlayerConnection", "PlayerConnection");
-    public Constructor<?> newEntityArmorStand;
-    public final Field PING = getField(EntityPlayer, "ping", "latency", "field_71138_i", "field_13967", "e");
-    public final Field PLAYER_CONNECTION = getFields(EntityPlayer, PlayerConnection).get(0);
+    protected Class<?> Packet;
+    protected Class<?> NetworkManager;
+    protected Class<?> EntityArmorStand;
+    protected Class<?> World;
+    public Class<?> EnumChatFormat;
+    public Class<?> EntityPlayer;
+    protected Class<?> EntityHuman;
+    protected Class<?> Entity;
+    protected Class<?> EntityLiving;
+    protected Class<?> PlayerConnection;
+    public Field PING;
+    public Field PLAYER_CONNECTION;
     public Field NETWORK_MANAGER;
     public Field CHANNEL;
-    public final Method getHandle = Class.forName("org.bukkit.craftbukkit." + serverPackage + ".entity.CraftPlayer").getMethod("getHandle");
-    public final Method sendPacket = getMethods(PlayerConnection, void.class, Packet).get(0);
+    public Method getHandle;
+    public Method sendPacket;
     public Method getProfile;
-    public final Method World_getHandle = Class.forName("org.bukkit.craftbukkit." + serverPackage + ".CraftWorld").getMethod("getHandle");
-    public final Enum[] EnumChatFormat_values = getEnumValues(EnumChatFormat);
+    public Enum[] EnumChatFormat_values;
 
     //chat
-    public Class<?> ChatComponentText;
-    public Class<?> ChatHoverable;
-    public Class<?> EnumClickAction;
-    private Class<?> IChatBaseComponent;
-    public Constructor<?> newChatComponentText;
-    public Constructor<?> newChatClickable;
-    public Constructor<?> newChatModifier;
-    public Constructor<?> newChatHoverable;
-    public Field ChatBaseComponent_extra;
-    public Field ChatBaseComponent_modifier;
-    public Field ChatComponentText_text;
-    public Field ChatClickable_action;
-    public Field ChatClickable_value;
-    public Field ChatModifier_bold;
-    public Field ChatModifier_italic;
-    public Field ChatModifier_underlined;
-    public Field ChatModifier_strikethrough;
-    public Field ChatModifier_obfuscated;
-    public Field ChatModifier_clickEvent;
-    public Field ChatModifier_hoverEvent;
-    public Field ChatHexColor_name;
-    public Field ChatHexColor_rgb;
-    public Field ChatModifier_color;
-    public Method ChatComponentText_addSibling;
-    public Method EnumHoverAction_a;
-    public Method ChatHoverable_getAction;
-    public Method ChatHexColor_ofInt;
-    public Method ChatHexColor_ofString;
-    public Method ChatHoverable_serialize;
-    public Method ChatHoverable_getValue;
-    public Method EnumHoverAction_fromJson;
-    public Method EnumHoverAction_fromLegacyComponent;
+    protected Class<?> IChatBaseComponent;
+    protected Class<?> ChatSerializer;
+    public Method ChatSerializer_DESERIALIZE;
 
     //PacketPlayOutChat
+    protected Class<?> PacketPlayOutChat;
     public Class<?> ChatMessageType;
     public Constructor<?> newPacketPlayOutChat;
     public Enum[] ChatMessageType_values;
 
     //DataWatcher
-    private final Class<?> DataWatcher = getNMSClass("net.minecraft.network.syncher.DataWatcher", "DataWatcher");
-    private final Class<?> DataWatcherItem = getNMSClass("net.minecraft.network.syncher.DataWatcher$Item", "DataWatcher$Item", "DataWatcher$WatchableObject", "WatchableObject");
+    protected Class<?> DataWatcher;
+    protected Class<?> DataWatcherItem;
+    protected Class<?> DataWatcherObject;
+    protected Class<?> DataWatcherSerializer;
     public Class<?> DataWatcherRegistry;
-    public final Constructor<?> newDataWatcher = DataWatcher.getConstructors()[0];
+    public Constructor<?> newDataWatcher;
     public Constructor<?> newDataWatcherObject;
     public Field DataWatcherItem_TYPE;
-    public final Field DataWatcherItem_VALUE = getFields(DataWatcherItem, Object.class).get(0);
+    public Field DataWatcherItem_VALUE;
     public Field DataWatcherObject_SLOT;
     public Field DataWatcherObject_SERIALIZER;
     public Method DataWatcher_REGISTER;
-    private DataWatcherRegistry registry;
+    private final DataWatcherRegistry registry;
 
     //PacketPlayOutSpawnEntityLiving
-    public final Class<?> PacketPlayOutSpawnEntityLiving = getNMSClass("net.minecraft.network.protocol.game.PacketPlayOutSpawnEntityLiving", "PacketPlayOutSpawnEntityLiving", "Packet24MobSpawn");
+    public Class<?> PacketPlayOutSpawnEntityLiving;
     public Constructor<?> newPacketPlayOutSpawnEntityLiving;
-    public final Field PacketPlayOutSpawnEntityLiving_ENTITYID = getFields(PacketPlayOutSpawnEntityLiving, int.class).get(0);
-    public final Field PacketPlayOutSpawnEntityLiving_ENTITYTYPE = getFields(PacketPlayOutSpawnEntityLiving, int.class).get(1);
-    public final Field PacketPlayOutSpawnEntityLiving_YAW = getFields(PacketPlayOutSpawnEntityLiving, byte.class).get(0);
-    public final Field PacketPlayOutSpawnEntityLiving_PITCH = getFields(PacketPlayOutSpawnEntityLiving, byte.class).get(0);
+    public Field PacketPlayOutSpawnEntityLiving_ENTITYID;
+    public Field PacketPlayOutSpawnEntityLiving_ENTITYTYPE;
+    public Field PacketPlayOutSpawnEntityLiving_YAW;
+    public Field PacketPlayOutSpawnEntityLiving_PITCH;
     public Field PacketPlayOutSpawnEntityLiving_UUID;
     public Field PacketPlayOutSpawnEntityLiving_X;
     public Field PacketPlayOutSpawnEntityLiving_Y;
     public Field PacketPlayOutSpawnEntityLiving_Z;
     public Field PacketPlayOutSpawnEntityLiving_DATAWATCHER;
+    public Method Registry_a;
+    public Object IRegistry_X;
 
     //PacketPlayOutEntityTeleport
-    public final Class<?> PacketPlayOutEntityTeleport = getNMSClass("net.minecraft.network.protocol.game.PacketPlayOutEntityTeleport", "PacketPlayOutEntityTeleport", "Packet34EntityTeleport");
+    public Class<?> PacketPlayOutEntityTeleport;
     public Constructor<?> newPacketPlayOutEntityTeleport;
-    public final Field PacketPlayOutEntityTeleport_ENTITYID = getFields(PacketPlayOutEntityTeleport, int.class).get(0);
+    public Field PacketPlayOutEntityTeleport_ENTITYID;
     public Field PacketPlayOutEntityTeleport_X;
     public Field PacketPlayOutEntityTeleport_Y;
     public Field PacketPlayOutEntityTeleport_Z;
-    public final Field PacketPlayOutEntityTeleport_YAW = getFields(PacketPlayOutEntityTeleport, byte.class).get(0);
-    public final Field PacketPlayOutEntityTeleport_PITCH = getFields(PacketPlayOutEntityTeleport, byte.class).get(1);
+    public Field PacketPlayOutEntityTeleport_YAW;
+    public Field PacketPlayOutEntityTeleport_PITCH;
 
     //PacketPlayOutPlayerListHeaderFooter
+    protected Class<?> PacketPlayOutPlayerListHeaderFooter;
     public Constructor<?> newPacketPlayOutPlayerListHeaderFooter;
     public Field PacketPlayOutPlayerListHeaderFooter_HEADER;
     public Field PacketPlayOutPlayerListHeaderFooter_FOOTER;
 
     //other entity packets
-    public final Class<?> PacketPlayInUseEntity = getNMSClass("net.minecraft.network.protocol.game.PacketPlayInUseEntity", "PacketPlayInUseEntity", "Packet7UseEntity");
+    public Class<?> PacketPlayInUseEntity;
     public Class<?> PacketPlayInUseEntity$d;
+    protected Class<?> EnumEntityUseAction;
     public Field PacketPlayInUseEntity_ENTITY;
     public Field PacketPlayInUseEntity_ACTION;
 
-    public final Class<?> PacketPlayOutEntity = getNMSClass("net.minecraft.network.protocol.game.PacketPlayOutEntity", "PacketPlayOutEntity", "Packet30Entity");
-    public final Field PacketPlayOutEntity_ENTITYID = getFields(PacketPlayOutEntity, int.class).get(0);
+    public Class<?> PacketPlayOutEntity;
+    public Field PacketPlayOutEntity_ENTITYID;
 
-    public final Class<?> PacketPlayOutEntityDestroy = getNMSClass("net.minecraft.network.protocol.game.PacketPlayOutEntityDestroy", "PacketPlayOutEntityDestroy", "Packet29DestroyEntity");
+    public Class<?> PacketPlayOutEntityDestroy;
     public Constructor<?> newPacketPlayOutEntityDestroy;
-    public final Field PacketPlayOutEntityDestroy_ENTITIES = setAccessible(PacketPlayOutEntityDestroy.getDeclaredFields()[0]);
+    public Field PacketPlayOutEntityDestroy_ENTITIES;
 
-    public final Class<?> PacketPlayOutEntityLook = getNMSClass("net.minecraft.network.protocol.game.PacketPlayOutEntity$PacketPlayOutEntityLook", "PacketPlayOutEntity$PacketPlayOutEntityLook", "PacketPlayOutEntityLook", "Packet32EntityLook");
+    public Class<?> PacketPlayOutEntityLook;
 
-    public final Class<?> PacketPlayOutEntityMetadata = getNMSClass("net.minecraft.network.protocol.game.PacketPlayOutEntityMetadata", "PacketPlayOutEntityMetadata", "Packet40EntityMetadata");
-    public final Constructor<?> newPacketPlayOutEntityMetadata = PacketPlayOutEntityMetadata.getConstructor(int.class, DataWatcher, boolean.class);
-    public final Field PacketPlayOutEntityMetadata_LIST = getFields(PacketPlayOutEntityMetadata, List.class).get(0);
+    public Class<?> PacketPlayOutEntityMetadata;
+    public Constructor<?> newPacketPlayOutEntityMetadata;
+    public Field PacketPlayOutEntityMetadata_LIST;
 
-    public final Class<?> PacketPlayOutNamedEntitySpawn = getNMSClass("net.minecraft.network.protocol.game.PacketPlayOutNamedEntitySpawn", "PacketPlayOutNamedEntitySpawn", "Packet20NamedEntitySpawn");
-    public final Field PacketPlayOutNamedEntitySpawn_ENTITYID = getFields(PacketPlayOutNamedEntitySpawn, int.class).get(0);
+    public Class<?> PacketPlayOutNamedEntitySpawn;
+    public Field PacketPlayOutNamedEntitySpawn_ENTITYID;
 
     //PacketPlayOutPlayerInfo
     public Class<?> PacketPlayOutPlayerInfo;
+    protected Class<?> EnumPlayerInfoAction;
+    protected Class<?> PlayerInfoData;
+    protected Class<?> EnumGamemode;
     public Constructor<?> newPacketPlayOutPlayerInfo;
     public Constructor<?> newPlayerInfoData;
     public Field PacketPlayOutPlayerInfo_ACTION;
@@ -173,38 +141,44 @@ public final class NMSStorage {
     public Enum[] EnumGamemode_values;
 
     //scoreboard objectives
-    public final Class<?> PacketPlayOutScoreboardDisplayObjective = getNMSClass("net.minecraft.network.protocol.game.PacketPlayOutScoreboardDisplayObjective", "PacketPlayOutScoreboardDisplayObjective", "Packet208SetScoreboardDisplayObjective");
-    public final Class<?> PacketPlayOutScoreboardObjective = getNMSClass("net.minecraft.network.protocol.game.PacketPlayOutScoreboardObjective", "PacketPlayOutScoreboardObjective", "Packet206SetScoreboardObjective");
-    private final Class<?> Scoreboard = getNMSClass("net.minecraft.world.scores.Scoreboard", "Scoreboard");
-    private final Class<?> PacketPlayOutScoreboardScore = getNMSClass("net.minecraft.network.protocol.game.PacketPlayOutScoreboardScore", "PacketPlayOutScoreboardScore", "Packet207SetScoreboardScore");
-    private final Class<?> ScoreboardObjective = getNMSClass("net.minecraft.world.scores.ScoreboardObjective", "ScoreboardObjective");
-    private final Class<?> ScoreboardScore = getNMSClass("net.minecraft.world.scores.ScoreboardScore", "ScoreboardScore");
-    private final Class<?> IScoreboardCriteria = getNMSClass("net.minecraft.world.scores.criteria.IScoreboardCriteria", "IScoreboardCriteria");
+    public Class<?> PacketPlayOutScoreboardDisplayObjective;
+    public Class<?> PacketPlayOutScoreboardObjective;
+    protected Class<?> Scoreboard;
+    protected Class<?> PacketPlayOutScoreboardScore;
+    protected Class<?> ScoreboardObjective;
+    protected Class<?> ScoreboardScore;
+    protected Class<?> IScoreboardCriteria;
     public Class<?> EnumScoreboardHealthDisplay;
-    public final Constructor<?> newScoreboardObjective = ScoreboardObjective.getConstructors()[0];
-    public final Constructor<?> newScoreboard = Scoreboard.getConstructor();
-    public final Constructor<?> newScoreboardScore = ScoreboardScore.getConstructor(Scoreboard, ScoreboardObjective, String.class);
-    public final Constructor<?> newPacketPlayOutScoreboardDisplayObjective = PacketPlayOutScoreboardDisplayObjective.getConstructor(int.class, ScoreboardObjective);
+    protected Class<?> EnumScoreboardAction;
+    public Constructor<?> newScoreboardObjective;
+    protected Constructor<?> newScoreboard;
+    public Constructor<?> newScoreboardScore;
+    public Constructor<?> newPacketPlayOutScoreboardDisplayObjective;
     public Constructor<?> newPacketPlayOutScoreboardObjective;
     public Constructor<?> newPacketPlayOutScoreboardScore_1_13;
     public Constructor<?> newPacketPlayOutScoreboardScore_String;
     public Constructor<?> newPacketPlayOutScoreboardScore;
-    public final Field PacketPlayOutScoreboardDisplayObjective_POSITION = getFields(PacketPlayOutScoreboardDisplayObjective, int.class).get(0);
-    public final Field PacketPlayOutScoreboardDisplayObjective_OBJECTIVENAME = getFields(PacketPlayOutScoreboardDisplayObjective, String.class).get(0);
-    public final Field PacketPlayOutScoreboardObjective_OBJECTIVENAME = getFields(PacketPlayOutScoreboardObjective, String.class).get(0);
+    public Field PacketPlayOutScoreboardDisplayObjective_POSITION;
+    public Field PacketPlayOutScoreboardDisplayObjective_OBJECTIVENAME;
+    public Field PacketPlayOutScoreboardObjective_OBJECTIVENAME;
     public Field PacketPlayOutScoreboardObjective_METHOD;
-    public final Field IScoreboardCriteria_self = getFields(IScoreboardCriteria, IScoreboardCriteria).get(0);
+    public Field IScoreboardCriteria_self;
     public Field PacketPlayOutScoreboardObjective_RENDERTYPE;
     public Field PacketPlayOutScoreboardObjective_DISPLAYNAME;
-    public final Method ScoreboardScore_setScore = getMethod(ScoreboardScore, new String[]{"setScore", "func_96647_c", "method_1128", "b"}, int.class);
+    public Method ScoreboardScore_setScore;
     public Enum[] EnumScoreboardHealthDisplay_values;
     public Enum[] EnumScoreboardAction_values;
 
     //PacketPlayOutScoreboardTeam
     public Class<?> PacketPlayOutScoreboardTeam;
+    protected Class<?> ScoreboardTeam;
+    protected Class<?> EnumNameTagVisibility;
+    protected Class<?> EnumTeamPush;
+    protected Class<?> PacketPlayOutScoreboardTeam_PlayerAction;
     public Constructor<?> newScoreboardTeam;
     public Constructor<?> newPacketPlayOutScoreboardTeam;
     public Field PacketPlayOutScoreboardTeam_NAME;
+    public Field PacketPlayOutScoreboardTeam_ACTION;
     public Field PacketPlayOutScoreboardTeam_PLAYERS;
     public Method ScoreboardTeam_getPlayerNameSet;
     public Method ScoreboardTeam_setNameTagVisibility;
@@ -221,37 +195,38 @@ public final class NMSStorage {
     public Enum[] EnumTeamPush_values;
     public Enum[] PacketPlayOutScoreboardTeam_PlayerAction_values;
 
-    /**
-     * Creates new instance, initializes required NMS classes and fields
-     *
-     * @throws  ReflectiveOperationException
-     *          If any class, field or method fails to load
-     */
+    //other
+    public Object emptyScoreboard;
+    public Object dummyEntity;
+
     public NMSStorage() throws ReflectiveOperationException {
         ProtocolVersion.UNKNOWN_SERVER_VERSION.setMinorVersion(minorVersion); //fixing compatibility with forks that set version field value to "Unknown"
-        Class<?> NetworkManager = getNMSClass("net.minecraft.network.NetworkManager", "NetworkManager");
+        loadClasses();
         if (minorVersion >= 7) {
             NETWORK_MANAGER = getFields(PlayerConnection, NetworkManager).get(0);
         }
         if (minorVersion >= 8) {
             CHANNEL = getFields(NetworkManager, Channel.class).get(0);
-            getProfile = getMethods(getNMSClass("net.minecraft.world.entity.player.EntityHuman", "EntityHuman"), GameProfile.class).get(0);
-            newEntityArmorStand = getNMSClass("net.minecraft.world.entity.decoration.EntityArmorStand", "EntityArmorStand")
-                    .getConstructor(getNMSClass("net.minecraft.world.level.World", "World"), double.class, double.class, double.class);
-        }
-        initializeChatComponents();
-        initializeChatPacket();
-        initializeDataWatcher();
-        initializeEntityPackets();
-        initializeHeaderFooterPacket();
-        initializePlayerInfoPacket();
-        initializeScoreboardPackets();
-        try {
-            initializeTeamPackets();
-        } catch (ClassNotFoundException e) {
-            Bukkit.getConsoleSender().sendMessage(me.neznamy.tab.api.chat.EnumChatFormat.color("&c[TAB] Failed to load PacketPlayOutScoreboardTeam"));
-            //fabric with missing team packet
+            getProfile = getMethods(EntityHuman, GameProfile.class).get(0);
+            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);
         }
+        PLAYER_CONNECTION = getFields(EntityPlayer, PlayerConnection).get(0);
+        getHandle = Class.forName("org.bukkit.craftbukkit." + serverPackage + ".entity.CraftPlayer").getMethod("getHandle");
+        sendPacket = getMethods(PlayerConnection, void.class, Packet).get(0);
+        EnumChatFormat_values = getEnumValues(EnumChatFormat);
+        registry = new DataWatcherRegistry(this);
+        dataWatcher();
+        entityTeleport();
+        spawnEntityLiving();
+        chat();
+        playerListHeaderFooter();
+        playerInfo();
+        otherEntity();
+        scoreboard();
+        scoreboardTeam();
+        loadNamedFieldsAndMethods();
     }
 
     /**
@@ -273,64 +248,18 @@ public final class NMSStorage {
         return instance;
     }
 
-    private void initializeChatComponents() throws ReflectiveOperationException {
-        if (minorVersion < 7) return;
-        Class<?> ChatBaseComponent = getNMSClass("net.minecraft.network.chat.ChatBaseComponent", "ChatBaseComponent");
-        Class<?> ChatClickable = getNMSClass("net.minecraft.network.chat.ChatClickable", "ChatClickable");
-        ChatComponentText = getNMSClass("net.minecraft.network.chat.ChatComponentText", "ChatComponentText");
-        ChatHoverable = getNMSClass("net.minecraft.network.chat.ChatHoverable", "ChatHoverable");
-        Class<?> ChatModifier = getNMSClass("net.minecraft.network.chat.ChatModifier", "ChatModifier");
-        EnumClickAction = getNMSClass("net.minecraft.network.chat.ChatClickable$EnumClickAction", "ChatClickable$EnumClickAction", "EnumClickAction");
-        Class<?> EnumHoverAction = getNMSClass("net.minecraft.network.chat.ChatHoverable$EnumHoverAction", "ChatHoverable$EnumHoverAction", "EnumHoverAction");
-        IChatBaseComponent = getNMSClass("net.minecraft.network.chat.IChatBaseComponent", "IChatBaseComponent");
-        newChatComponentText = ChatComponentText.getConstructor(String.class);
-        newChatClickable = ChatClickable.getConstructor(EnumClickAction, String.class);
-        ChatBaseComponent_extra = getFields(ChatBaseComponent, List.class).get(0);
-        ChatBaseComponent_modifier = getFields(ChatBaseComponent, ChatModifier).get(0);
-        ChatComponentText_text = getFields(ChatComponentText, String.class).get(0);
-        ChatClickable_action = getFields(ChatClickable, EnumClickAction).get(0);
-        ChatClickable_value = getFields(ChatClickable, String.class).get(0);
-        List<Field> booleans = getFields(ChatModifier, Boolean.class);
-        ChatModifier_bold = booleans.get(0);
-        ChatModifier_italic = booleans.get(1);
-        ChatModifier_underlined = booleans.get(2);
-        ChatModifier_strikethrough = booleans.get(3);
-        ChatModifier_obfuscated = booleans.get(4);
-        ChatModifier_clickEvent = getFields(ChatModifier, ChatClickable).get(0);
-        ChatModifier_hoverEvent = getFields(ChatModifier, ChatHoverable).get(0);
-        ChatComponentText_addSibling = getMethod(ChatComponentText, new String[]{"addSibling", "a", "func_150257_a", "method_10852"}, IChatBaseComponent);
-        EnumHoverAction_a = getMethod(EnumHoverAction, new String[]{"a", "func_150684_a", "method_27670"}, String.class);
-        ChatHoverable_getAction = getMethods(ChatHoverable, EnumHoverAction).get(0);
-        if (minorVersion >= 16) {
-            Class<?> ChatHexColor = getNMSClass("net.minecraft.network.chat.ChatHexColor", "ChatHexColor");
-            Class<?> MinecraftKey = getNMSClass("net.minecraft.resources.MinecraftKey", "MinecraftKey");
-            newChatModifier = setAccessible(ChatModifier.getDeclaredConstructor(ChatHexColor, Boolean.class, Boolean.class, Boolean.class, Boolean.class, Boolean.class, ChatClickable, ChatHoverable, String.class, MinecraftKey));
-            newChatHoverable = ChatHoverable.getConstructor(EnumHoverAction, Object.class);
-            List<Field> list = getFields(ChatHexColor, String.class);
-            ChatHexColor_name = list.get(list.size()-1);
-            ChatHexColor_rgb = getFields(ChatHexColor, int.class).get(0);
-            ChatModifier_color = getFields(ChatModifier, ChatHexColor).get(0);
-            ChatHexColor_ofInt = getMethods(ChatHexColor, ChatHexColor, int.class).get(0);
-            ChatHexColor_ofString = getMethods(ChatHexColor, ChatHexColor, String.class).get(0);
-            ChatHoverable_serialize = getMethods(ChatHoverable, JsonObject.class).get(0);
-            ChatHoverable_getValue = getMethods(ChatHoverable, Object.class, EnumHoverAction).get(0);
-            EnumHoverAction_fromJson = getMethods(EnumHoverAction, ChatHoverable, JsonElement.class).get(0);
-            EnumHoverAction_fromLegacyComponent = getMethods(EnumHoverAction, ChatHoverable, IChatBaseComponent).get(0);
-        } else {
-            newChatModifier = ChatModifier.getConstructor();
-            newChatHoverable = ChatHoverable.getConstructor(EnumHoverAction, IChatBaseComponent);
-            ChatModifier_color = getFields(ChatModifier, EnumChatFormat).get(0);
-            ChatHoverable_getValue = getMethods(ChatHoverable, IChatBaseComponent).get(0);
-        }
-    }
-
-    private void initializeChatPacket() throws ReflectiveOperationException {
-        Class<?> PacketPlayOutChat = getNMSClass("net.minecraft.network.protocol.game.PacketPlayOutChat", "PacketPlayOutChat", "Packet3Chat");
-        if (minorVersion >= 12) {
-            ChatMessageType = getNMSClass("net.minecraft.network.chat.ChatMessageType", "ChatMessageType");
+    protected void chat() throws ReflectiveOperationException {
+        if (minorVersion >= 12 && minorVersion <= 18) {
             ChatMessageType_values = getEnumValues(ChatMessageType);
         }
-        if (minorVersion >= 16) {
+        if (minorVersion >= 19) {
+            try {
+                newPacketPlayOutChat = PacketPlayOutChat.getConstructor(IChatBaseComponent, boolean.class);
+            } catch (NoSuchMethodException e) {
+                //1.19.0
+                newPacketPlayOutChat = PacketPlayOutChat.getConstructor(IChatBaseComponent, int.class);
+            }
+        } else if (minorVersion >= 16) {
             newPacketPlayOutChat = PacketPlayOutChat.getConstructor(IChatBaseComponent, ChatMessageType, UUID.class);
         } else if (minorVersion >= 12) {
             newPacketPlayOutChat = PacketPlayOutChat.getConstructor(IChatBaseComponent, ChatMessageType);
@@ -341,84 +270,8 @@ public final class NMSStorage {
         }
     }
 
-    private void initializeDataWatcher() throws ReflectiveOperationException {
-        if (minorVersion >= 9) {
-            Class<?> DataWatcherObject = getNMSClass("net.minecraft.network.syncher.DataWatcherObject", "DataWatcherObject");
-            DataWatcherRegistry = getNMSClass("net.minecraft.network.syncher.DataWatcherRegistry", "DataWatcherRegistry");
-            Class<?> DataWatcherSerializer = getNMSClass("net.minecraft.network.syncher.DataWatcherSerializer", "DataWatcherSerializer");
-            newDataWatcherObject = DataWatcherObject.getConstructor(int.class, DataWatcherSerializer);
-            DataWatcherItem_TYPE = getFields(DataWatcherItem, DataWatcherObject).get(0);
-            DataWatcherObject_SLOT = getFields(DataWatcherObject, int.class).get(0);
-            DataWatcherObject_SERIALIZER = getFields(DataWatcherObject, DataWatcherSerializer).get(0);
-            DataWatcher_REGISTER = getMethod(DataWatcher, new String[]{"register", "method_12784", "a"}, DataWatcherObject, Object.class);
-        } else {
-            DataWatcherItem_TYPE = getFields(DataWatcherItem, int.class).get(1);
-            DataWatcher_REGISTER = getMethod(DataWatcher, new String[]{"a", "func_75682_a"}, int.class, Object.class);
-        }
-        registry = new DataWatcherRegistry(this);
-    }
-
-    private void initializeEntityPackets() throws ReflectiveOperationException {
-        if (minorVersion >= 17 || serverVersion.getMinorVersion() >= 17) {
-            newPacketPlayOutSpawnEntityLiving = PacketPlayOutSpawnEntityLiving.getConstructor(EntityLiving);
-            newPacketPlayOutEntityTeleport = PacketPlayOutEntityTeleport.getConstructor(Entity);
-        } else {
-            newPacketPlayOutSpawnEntityLiving = PacketPlayOutSpawnEntityLiving.getConstructor();
-            newPacketPlayOutEntityTeleport = PacketPlayOutEntityTeleport.getConstructor();
-        }
-        if (minorVersion >= 17) {
-            PacketPlayInUseEntity$d = Class.forName("net.minecraft.network.protocol.game.PacketPlayInUseEntity$d");
-        }
-        try {
-            newPacketPlayOutEntityDestroy = PacketPlayOutEntityDestroy.getConstructor(int[].class);
-        } catch (NoSuchMethodException e) {
-            //1.17.0
-            newPacketPlayOutEntityDestroy = PacketPlayOutEntityDestroy.getConstructor(int.class);
-        }
-        if (minorVersion >= 7) {
-            Class<?> EnumEntityUseAction = getNMSClass("net.minecraft.network.protocol.game.PacketPlayInUseEntity$EnumEntityUseAction", "PacketPlayInUseEntity$EnumEntityUseAction", "EnumEntityUseAction", "net.minecraft.class_2824$class_5906");
-            PacketPlayInUseEntity_ENTITY = getFields(PacketPlayInUseEntity, int.class).get(0);
-            PacketPlayInUseEntity_ACTION = getFields(PacketPlayInUseEntity, EnumEntityUseAction).get(0);
-        }
-        if (minorVersion >= 9) {
-            PacketPlayOutSpawnEntityLiving_UUID = getFields(PacketPlayOutSpawnEntityLiving, UUID.class).get(0);
-            PacketPlayOutSpawnEntityLiving_X = getFields(PacketPlayOutSpawnEntityLiving, double.class).get(0);
-            PacketPlayOutSpawnEntityLiving_Y = getFields(PacketPlayOutSpawnEntityLiving, double.class).get(1);
-            PacketPlayOutSpawnEntityLiving_Z = getFields(PacketPlayOutSpawnEntityLiving, double.class).get(2);
-            PacketPlayOutEntityTeleport_X = getFields(PacketPlayOutEntityTeleport, double.class).get(0);
-            PacketPlayOutEntityTeleport_Y = getFields(PacketPlayOutEntityTeleport, double.class).get(1);
-            PacketPlayOutEntityTeleport_Z = getFields(PacketPlayOutEntityTeleport, double.class).get(2);
-        } else {
-            PacketPlayOutSpawnEntityLiving_X = getFields(PacketPlayOutSpawnEntityLiving, int.class).get(2);
-            PacketPlayOutSpawnEntityLiving_Y = getFields(PacketPlayOutSpawnEntityLiving, int.class).get(3);
-            PacketPlayOutSpawnEntityLiving_Z = getFields(PacketPlayOutSpawnEntityLiving, int.class).get(4);
-            PacketPlayOutEntityTeleport_X = getFields(PacketPlayOutEntityTeleport, int.class).get(1);
-            PacketPlayOutEntityTeleport_Y = getFields(PacketPlayOutEntityTeleport, int.class).get(2);
-            PacketPlayOutEntityTeleport_Z = getFields(PacketPlayOutEntityTeleport, int.class).get(3);
-        }
-        if (minorVersion <= 14) {
-            PacketPlayOutSpawnEntityLiving_DATAWATCHER = getFields(PacketPlayOutSpawnEntityLiving, DataWatcher).get(0);
-        }
-    }
-
-    private void initializeHeaderFooterPacket() throws ReflectiveOperationException {
+    protected void playerInfo() throws ReflectiveOperationException {
         if (minorVersion < 8) return;
-        Class<?> PacketPlayOutPlayerListHeaderFooter = getNMSClass("net.minecraft.network.protocol.game.PacketPlayOutPlayerListHeaderFooter", "PacketPlayOutPlayerListHeaderFooter");
-        PacketPlayOutPlayerListHeaderFooter_HEADER = getFields(PacketPlayOutPlayerListHeaderFooter, IChatBaseComponent).get(0);
-        PacketPlayOutPlayerListHeaderFooter_FOOTER = getFields(PacketPlayOutPlayerListHeaderFooter, IChatBaseComponent).get(1);
-        if (minorVersion >= 17 || serverVersion.getMinorVersion() >= 17) {
-            newPacketPlayOutPlayerListHeaderFooter = PacketPlayOutPlayerListHeaderFooter.getConstructor(IChatBaseComponent, IChatBaseComponent);
-        } else {
-            newPacketPlayOutPlayerListHeaderFooter = PacketPlayOutPlayerListHeaderFooter.getConstructor();
-        }
-    }
-
-    private void initializePlayerInfoPacket() throws ReflectiveOperationException {
-        if (minorVersion < 8) return;
-        PacketPlayOutPlayerInfo = getNMSClass("net.minecraft.network.protocol.game.PacketPlayOutPlayerInfo", "PacketPlayOutPlayerInfo");
-        Class<?> EnumPlayerInfoAction = getNMSClass("net.minecraft.network.protocol.game.PacketPlayOutPlayerInfo$EnumPlayerInfoAction", "PacketPlayOutPlayerInfo$EnumPlayerInfoAction", "EnumPlayerInfoAction", "net.minecraft.class_2703$class_5893");
-        Class<?> PlayerInfoData = getNMSClass("net.minecraft.network.protocol.game.PacketPlayOutPlayerInfo$PlayerInfoData", "PacketPlayOutPlayerInfo$PlayerInfoData", "PlayerInfoData");
-        Class<?> EnumGamemode = getNMSClass("net.minecraft.world.level.EnumGamemode", "EnumGamemode", "WorldSettings$EnumGamemode");
         newPacketPlayOutPlayerInfo = PacketPlayOutPlayerInfo.getConstructor(EnumPlayerInfoAction, Array.newInstance(EntityPlayer, 0).getClass());
         newPlayerInfoData = PlayerInfoData.getConstructors()[0];
         PacketPlayOutPlayerInfo_ACTION = getFields(PacketPlayOutPlayerInfo, EnumPlayerInfoAction).get(0);
@@ -431,14 +284,115 @@ public final class NMSStorage {
         EnumGamemode_values = getEnumValues(EnumGamemode);
     }
 
-    private void initializeScoreboardPackets() throws ReflectiveOperationException {
+    protected void spawnEntityLiving() throws ReflectiveOperationException {
+        if (minorVersion >= 17 || serverVersion.getMinorVersion() >= 17) {
+            newPacketPlayOutSpawnEntityLiving = PacketPlayOutSpawnEntityLiving.getConstructor(EntityLiving);
+        } else {
+            newPacketPlayOutSpawnEntityLiving = PacketPlayOutSpawnEntityLiving.getConstructor();
+        }
+        PacketPlayOutSpawnEntityLiving_ENTITYID = getFields(PacketPlayOutSpawnEntityLiving, int.class).get(0);
+        PacketPlayOutSpawnEntityLiving_YAW = getFields(PacketPlayOutSpawnEntityLiving, byte.class).get(0);
+        PacketPlayOutSpawnEntityLiving_PITCH = getFields(PacketPlayOutSpawnEntityLiving, byte.class).get(0);
+        if (minorVersion >= 9) {
+            PacketPlayOutSpawnEntityLiving_UUID = getFields(PacketPlayOutSpawnEntityLiving, UUID.class).get(0);
+            if (minorVersion >= 19) {
+                PacketPlayOutSpawnEntityLiving_X = getFields(PacketPlayOutSpawnEntityLiving, double.class).get(2);
+                PacketPlayOutSpawnEntityLiving_Y = getFields(PacketPlayOutSpawnEntityLiving, double.class).get(3);
+                PacketPlayOutSpawnEntityLiving_Z = getFields(PacketPlayOutSpawnEntityLiving, double.class).get(4);
+            } else {
+                PacketPlayOutSpawnEntityLiving_X = getFields(PacketPlayOutSpawnEntityLiving, double.class).get(0);
+                PacketPlayOutSpawnEntityLiving_Y = getFields(PacketPlayOutSpawnEntityLiving, double.class).get(1);
+                PacketPlayOutSpawnEntityLiving_Z = getFields(PacketPlayOutSpawnEntityLiving, double.class).get(2);
+            }
+        } else {
+            PacketPlayOutSpawnEntityLiving_X = getFields(PacketPlayOutSpawnEntityLiving, int.class).get(2);
+            PacketPlayOutSpawnEntityLiving_Y = getFields(PacketPlayOutSpawnEntityLiving, int.class).get(3);
+            PacketPlayOutSpawnEntityLiving_Z = getFields(PacketPlayOutSpawnEntityLiving, int.class).get(4);
+        }
+        if (minorVersion < 19) {
+            PacketPlayOutSpawnEntityLiving_ENTITYTYPE = getFields(PacketPlayOutSpawnEntityLiving, int.class).get(1);
+        }
+        if (minorVersion <= 14) {
+            PacketPlayOutSpawnEntityLiving_DATAWATCHER = getFields(PacketPlayOutSpawnEntityLiving, DataWatcher).get(0);
+        }
+    }
+
+    protected void entityTeleport() throws ReflectiveOperationException {
+        PacketPlayOutEntityTeleport_ENTITYID = getFields(PacketPlayOutEntityTeleport, int.class).get(0);
+        PacketPlayOutEntityTeleport_YAW = getFields(PacketPlayOutEntityTeleport, byte.class).get(0);
+        PacketPlayOutEntityTeleport_PITCH = getFields(PacketPlayOutEntityTeleport, byte.class).get(1);
+        if (minorVersion >= 17 || serverVersion.getMinorVersion() >= 17) {
+            newPacketPlayOutEntityTeleport = PacketPlayOutEntityTeleport.getConstructor(Entity);
+        } else {
+            newPacketPlayOutEntityTeleport = PacketPlayOutEntityTeleport.getConstructor();
+        }
+        if (minorVersion >= 9) {
+            PacketPlayOutEntityTeleport_X = getFields(PacketPlayOutEntityTeleport, double.class).get(0);
+            PacketPlayOutEntityTeleport_Y = getFields(PacketPlayOutEntityTeleport, double.class).get(1);
+            PacketPlayOutEntityTeleport_Z = getFields(PacketPlayOutEntityTeleport, double.class).get(2);
+        } else {
+            PacketPlayOutEntityTeleport_X = getFields(PacketPlayOutEntityTeleport, int.class).get(1);
+            PacketPlayOutEntityTeleport_Y = getFields(PacketPlayOutEntityTeleport, int.class).get(2);
+            PacketPlayOutEntityTeleport_Z = getFields(PacketPlayOutEntityTeleport, int.class).get(3);
+        }
+    }
+
+    protected void playerListHeaderFooter() throws ReflectiveOperationException {
+        if (minorVersion < 8) return;
+        PacketPlayOutPlayerListHeaderFooter_HEADER = getFields(PacketPlayOutPlayerListHeaderFooter, IChatBaseComponent).get(0);
+        PacketPlayOutPlayerListHeaderFooter_FOOTER = getFields(PacketPlayOutPlayerListHeaderFooter, IChatBaseComponent).get(1);
+        if (minorVersion >= 17 || serverVersion.getMinorVersion() >= 17) {
+            newPacketPlayOutPlayerListHeaderFooter = PacketPlayOutPlayerListHeaderFooter.getConstructor(IChatBaseComponent, IChatBaseComponent);
+        } else {
+            newPacketPlayOutPlayerListHeaderFooter = PacketPlayOutPlayerListHeaderFooter.getConstructor();
+        }
+    }
+
+    protected void otherEntity() throws ReflectiveOperationException {
+        PacketPlayOutEntity_ENTITYID = getFields(PacketPlayOutEntity, int.class).get(0);
+        PacketPlayOutEntityDestroy_ENTITIES = setAccessible(PacketPlayOutEntityDestroy.getDeclaredFields()[0]);
+        newPacketPlayOutEntityMetadata = PacketPlayOutEntityMetadata.getConstructor(int.class, DataWatcher, boolean.class);
+        PacketPlayOutEntityMetadata_LIST = getFields(PacketPlayOutEntityMetadata, List.class).get(0);
+        PacketPlayOutNamedEntitySpawn_ENTITYID = getFields(PacketPlayOutNamedEntitySpawn, int.class).get(0);
+        if (minorVersion >= 7) {
+            PacketPlayInUseEntity_ENTITY = getFields(PacketPlayInUseEntity, int.class).get(0);
+            PacketPlayInUseEntity_ACTION = getFields(PacketPlayInUseEntity, EnumEntityUseAction).get(0);
+        }
+        try {
+            newPacketPlayOutEntityDestroy = PacketPlayOutEntityDestroy.getConstructor(int[].class);
+        } catch (NoSuchMethodException e) {
+            //1.17.0
+            newPacketPlayOutEntityDestroy = PacketPlayOutEntityDestroy.getConstructor(int.class);
+        }
+    }
+
+    protected void dataWatcher() throws ReflectiveOperationException {
+        newDataWatcher = DataWatcher.getConstructors()[0];
+        DataWatcherItem_VALUE = getFields(DataWatcherItem, Object.class).get(0);
+        if (minorVersion >= 9) {
+            newDataWatcherObject = DataWatcherObject.getConstructor(int.class, DataWatcherSerializer);
+            DataWatcherItem_TYPE = getFields(DataWatcherItem, DataWatcherObject).get(0);
+            DataWatcherObject_SLOT = getFields(DataWatcherObject, int.class).get(0);
+            DataWatcherObject_SERIALIZER = getFields(DataWatcherObject, DataWatcherSerializer).get(0);
+        } else {
+            DataWatcherItem_TYPE = getFields(DataWatcherItem, int.class).get(1);
+        }
+    }
+
+    protected void scoreboard() throws ReflectiveOperationException {
+        newScoreboardObjective = ScoreboardObjective.getConstructors()[0];
+        newScoreboard = Scoreboard.getConstructor();
+        emptyScoreboard = newScoreboard.newInstance();
+        newScoreboardScore = ScoreboardScore.getConstructor(Scoreboard, ScoreboardObjective, String.class);
+        newPacketPlayOutScoreboardDisplayObjective = PacketPlayOutScoreboardDisplayObjective.getConstructor(int.class, ScoreboardObjective);
+        PacketPlayOutScoreboardDisplayObjective_POSITION = getFields(PacketPlayOutScoreboardDisplayObjective, int.class).get(0);
+        PacketPlayOutScoreboardDisplayObjective_OBJECTIVENAME = getFields(PacketPlayOutScoreboardDisplayObjective, String.class).get(0);
+        PacketPlayOutScoreboardObjective_OBJECTIVENAME = getFields(PacketPlayOutScoreboardObjective, String.class).get(0);
+        IScoreboardCriteria_self = getFields(IScoreboardCriteria, IScoreboardCriteria).get(0);
         List<Field> list = getFields(PacketPlayOutScoreboardObjective, int.class);
         PacketPlayOutScoreboardObjective_METHOD = list.get(list.size()-1);
-        Class<?> EnumScoreboardAction = null;
         if (minorVersion >= 8) {
-            EnumScoreboardHealthDisplay = getNMSClass("net.minecraft.world.scores.criteria.IScoreboardCriteria$EnumScoreboardHealthDisplay", "IScoreboardCriteria$EnumScoreboardHealthDisplay", "EnumScoreboardHealthDisplay");
             EnumScoreboardHealthDisplay_values = getEnumValues(EnumScoreboardHealthDisplay);
-            EnumScoreboardAction = getNMSClass("net.minecraft.server.ScoreboardServer$Action", "ScoreboardServer$Action", "PacketPlayOutScoreboardScore$EnumScoreboardAction", "EnumScoreboardAction");
             EnumScoreboardAction_values = getEnumValues(EnumScoreboardAction);
             PacketPlayOutScoreboardObjective_RENDERTYPE = getFields(PacketPlayOutScoreboardObjective, EnumScoreboardHealthDisplay).get(0);
         }
@@ -458,35 +412,23 @@ public final class NMSStorage {
         }
     }
 
-    private void initializeTeamPackets() throws ReflectiveOperationException {
-        PacketPlayOutScoreboardTeam = getNMSClass("net.minecraft.network.protocol.game.PacketPlayOutScoreboardTeam", "PacketPlayOutScoreboardTeam", "Packet209SetScoreboardTeam");
-        Class<?> ScoreboardTeam = getNMSClass("net.minecraft.world.scores.ScoreboardTeam", "ScoreboardTeam");
+    protected void scoreboardTeam() throws ReflectiveOperationException {
         newScoreboardTeam = ScoreboardTeam.getConstructor(Scoreboard, String.class);
         PacketPlayOutScoreboardTeam_NAME = getFields(PacketPlayOutScoreboardTeam, String.class).get(0);
+        PacketPlayOutScoreboardTeam_ACTION = getInstanceFields(PacketPlayOutScoreboardTeam, int.class).get(0);
         PacketPlayOutScoreboardTeam_PLAYERS = getFields(PacketPlayOutScoreboardTeam, Collection.class).get(0);
         ScoreboardTeam_getPlayerNameSet = getMethods(ScoreboardTeam, Collection.class).get(0);
-        ScoreboardTeam_setAllowFriendlyFire = getMethod(ScoreboardTeam, new String[]{"setAllowFriendlyFire", "a", "func_96660_a"}, boolean.class);
-        ScoreboardTeam_setCanSeeFriendlyInvisibles = getMethod(ScoreboardTeam, new String[]{"setCanSeeFriendlyInvisibles", "b", "func_98300_b"}, boolean.class);
         if (minorVersion >= 8) {
-            Class<?> EnumNameTagVisibility = getNMSClass("net.minecraft.world.scores.ScoreboardTeamBase$EnumNameTagVisibility", "ScoreboardTeamBase$EnumNameTagVisibility", "EnumNameTagVisibility");
             EnumNameTagVisibility_values = getEnumValues(EnumNameTagVisibility);
-            ScoreboardTeam_setNameTagVisibility = getMethod(ScoreboardTeam, new String[]{"setNameTagVisibility", "a", "method_1149"}, EnumNameTagVisibility);
         }
         if (minorVersion >= 9) {
-            Class<?> EnumTeamPush = getNMSClass("net.minecraft.world.scores.ScoreboardTeamBase$EnumTeamPush", "ScoreboardTeamBase$EnumTeamPush");
             EnumTeamPush_values = getEnumValues(EnumTeamPush);
             ScoreboardTeam_setCollisionRule = getMethods(ScoreboardTeam, void.class, EnumTeamPush).get(0);
         }
         if (minorVersion >= 13) {
-            ScoreboardTeam_setPrefix = getMethod(ScoreboardTeam, new String[]{"setPrefix", "method_1138", "b"}, IChatBaseComponent);
-            ScoreboardTeam_setSuffix = getMethod(ScoreboardTeam, new String[]{"setSuffix", "method_1139", "c"}, IChatBaseComponent);
             ScoreboardTeam_setColor = getMethods(ScoreboardTeam, void.class, EnumChatFormat).get(0);
-        } else {
-            ScoreboardTeam_setPrefix = getMethod(ScoreboardTeam, new String[]{"setPrefix", "func_96666_b"}, String.class);
-            ScoreboardTeam_setSuffix = getMethod(ScoreboardTeam, new String[]{"setSuffix", "func_96662_c"}, String.class);
         }
-        if (minorVersion >= 17 || serverVersion.getMinorVersion() >= 17) {
-            Class<?> PacketPlayOutScoreboardTeam_PlayerAction = Class.forName("net.minecraft.network.protocol.game.PacketPlayOutScoreboardTeam$a");
+        if (minorVersion >= 17) {
             PacketPlayOutScoreboardTeam_of = getMethods(PacketPlayOutScoreboardTeam, PacketPlayOutScoreboardTeam, ScoreboardTeam).get(0);
             PacketPlayOutScoreboardTeam_ofBoolean = getMethods(PacketPlayOutScoreboardTeam, PacketPlayOutScoreboardTeam, ScoreboardTeam, boolean.class).get(0);
             PacketPlayOutScoreboardTeam_ofString = getMethods(PacketPlayOutScoreboardTeam, PacketPlayOutScoreboardTeam, ScoreboardTeam, String.class, PacketPlayOutScoreboardTeam_PlayerAction).get(0);
@@ -496,53 +438,9 @@ public final class 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<?> getNMSClass(String fullPath_1_17, String... names) throws ClassNotFoundException {
-        if (minorVersion >= 17) {
-            return Class.forName(fullPath_1_17);
-        }
-        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 {modern = " + fullPath_1_17 + ", legacy = " + Arrays.toString(names) + "}");
-    }
+    public abstract void loadClasses() throws ClassNotFoundException;
 
-    /**
-     * Returns class from given name
-     *
-     * @param   name
-     *          class name
-     * @return  class from given name
-     * @throws  ClassNotFoundException
-     *          if class was not found
-     */
-    private Class<?> getLegacyClass(String name) throws ClassNotFoundException {
-        try {
-            return Class.forName("net.minecraft.server." + serverPackage + "." + name);
-        } catch (ClassNotFoundException | NullPointerException e) {
-            try {
-                //modded server?
-                Class<?> clazz = Main.class.getClassLoader().loadClass("net.minecraft.server." + serverPackage + "." + name);
-                if (clazz != null) return clazz;
-                throw new ClassNotFoundException(name);
-            } catch (ClassNotFoundException | NullPointerException e1) {
-                //maybe fabric?
-                return Class.forName(name);
-            }
-        }
-    }
+    public abstract void loadNamedFieldsAndMethods() throws ReflectiveOperationException;
 
     /**
      * Returns method with specified possible names and parameters. Throws exception if no such method was found
@@ -557,7 +455,7 @@ public final class NMSStorage {
      * @throws  NoSuchMethodException
      *          if no such method exists
      */
-    private Method getMethod(Class<?> clazz, String[] names, Class<?>... parameterTypes) throws NoSuchMethodException {
+    protected Method getMethod(Class<?> clazz, String[] names, Class<?>... parameterTypes) throws NoSuchMethodException {
         for (String name : names) {
             try {
                 return getMethod(clazz, name, parameterTypes);
@@ -582,7 +480,7 @@ public final class NMSStorage {
                 Arrays.toString(parameterTypes) + " in class " + clazz.getName() + ". Methods with matching parameters: " + list);
     }
 
-    private Method getMethod(Class<?> clazz, String name, Class<?>... parameterTypes) throws NoSuchMethodException {
+    protected Method getMethod(Class<?> clazz, String name, Class<?>... parameterTypes) throws NoSuchMethodException {
         List<Method> list = new ArrayList<>();
         for (Method m : clazz.getMethods()) {
             if (!m.getName().equals(name) || m.getParameterCount() != parameterTypes.length) continue;
@@ -600,7 +498,7 @@ public final class NMSStorage {
         throw new NoSuchMethodException("No method found with name " + name + " in class " + clazz.getName() + " with parameters " + Arrays.toString(parameterTypes));
     }
 
-    private List<Method> getMethods(Class<?> clazz, Class<?> returnType, Class<?>... parameterTypes){
+    protected List<Method> getMethods(Class<?> clazz, Class<?> returnType, Class<?>... parameterTypes){
         List<Method> list = new ArrayList<>();
         for (Method m : clazz.getDeclaredMethods()) {
             if (m.getReturnType() != returnType || m.getParameterCount() != parameterTypes.length || !Modifier.isPublic(m.getModifiers())) continue;
@@ -626,7 +524,7 @@ public final class NMSStorage {
      *          field type to check for
      * @return  list of all fields with specified class type
      */
-    private List<Field> getFields(Class<?> clazz, Class<?> type){
+    protected List<Field> getFields(Class<?> clazz, Class<?> type){
         if (clazz == null) throw new IllegalArgumentException("Source class cannot be null");
         List<Field> list = new ArrayList<>();
         for (Field field : clazz.getDeclaredFields()) {
@@ -637,6 +535,26 @@ public final class NMSStorage {
         return list;
     }
 
+    /**
+     * Returns all instance fields of class with defined class type
+     *
+     * @param   clazz
+     *          class to check fields of
+     * @param   type
+     *          field type to check for
+     * @return  list of all fields with specified class type
+     */
+    public List<Field> getInstanceFields(Class<?> clazz, Class<?> type){
+        if (clazz == null) throw new IllegalArgumentException("Source class cannot be null");
+        List<Field> list = new ArrayList<>();
+        for (Field field : clazz.getDeclaredFields()) {
+            if (field.getType() == type && !Modifier.isStatic(field.getModifiers())) {
+                list.add(setAccessible(field));
+            }
+        }
+        return list;
+    }
+
     /**
      * Returns field with specified name and makes it accessible
      *
@@ -648,7 +566,7 @@ public final class NMSStorage {
      * @throws  NoSuchFieldException
      *          if field was not found
      */
-    private Field getField(Class<?> clazz, String name) throws NoSuchFieldException {
+    protected Field getField(Class<?> clazz, String name) throws NoSuchFieldException {
         for (Field f : clazz.getDeclaredFields()) {
             if (f.getName().equals(name) || (f.getName().split("_").length == 3 && f.getName().split("_")[2].equals(name))) {
                 return setAccessible(f);
@@ -657,7 +575,7 @@ public final class NMSStorage {
         throw new NoSuchFieldException("Field \"" + name + "\" was not found in class " + clazz.getName());
     }
 
-    private Field getField(Class<?> clazz, String... potentialNames) throws NoSuchFieldException {
+    protected Field getField(Class<?> clazz, String... potentialNames) throws NoSuchFieldException {
         for (String name : potentialNames) {
             try {
                 return getField(clazz, name);
@@ -668,14 +586,13 @@ public final class NMSStorage {
         throw new NoSuchFieldException("No field found in class " + clazz.getName() + " with potential names " + Arrays.toString(potentialNames));
     }
 
-    private Enum[] getEnumValues(Class<?> enumClass) {
+    protected Enum[] getEnumValues(Class<?> enumClass) {
         if (enumClass == null) throw new IllegalArgumentException("Class cannot be null");
         if (!enumClass.isEnum()) throw new IllegalArgumentException(enumClass.getName() + " is not an enum class");
         try {
             return (Enum[]) enumClass.getMethod("values").invoke(null);
         } catch (ReflectiveOperationException e) {
             //this should never happen
-            TAB.getInstance().getErrorManager().criticalError("Failed to load enum constants of " + enumClass.getName(), e);
             return new Enum[0];
         }
     }
@@ -696,4 +613,26 @@ public final class NMSStorage {
         o.setAccessible(true);
         return o;
     }
+
+    /**
+     * Gets values of all static fields in a class
+     *
+     * @param   clazz
+     *          class to return field values from
+     * @return  map of values
+     */
+    public Map<String, Object> getStaticFields(Class<?> clazz){
+        Map<String, Object> fields = new HashMap<>();
+        for (Field field : clazz.getDeclaredFields()) {
+            if (Modifier.isStatic(field.getModifiers())) {
+                setAccessible(field);
+                try {
+                    fields.put(field.getName(), field.get(null));
+                } catch (IllegalAccessException e) {
+                    //this will never happen
+                }
+            }
+        }
+        return fields;
+    }
 }

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

@@ -1,14 +1,14 @@
 package me.neznamy.tab.platforms.bukkit.nms.datawatcher;
 
-import java.util.Optional;
-
 import me.neznamy.tab.api.ProtocolVersion;
+import me.neznamy.tab.api.TabAPI;
 import me.neznamy.tab.api.chat.IChatBaseComponent;
-import me.neznamy.tab.api.util.Preconditions;
 import me.neznamy.tab.platforms.bukkit.BukkitPacketBuilder;
 import me.neznamy.tab.platforms.bukkit.nms.NMSStorage;
 import me.neznamy.tab.shared.TAB;
 
+import java.util.Optional;
+
 /**
  * A class to help to assign DataWatcher items as positions often change per-version
  */
@@ -30,7 +30,6 @@ public class DataWatcherHelper {
      *          data to write to
      */
     public DataWatcherHelper(DataWatcher data) {
-        Preconditions.checkNotNull(data, "dataWatcher");
         this.data = data;
         this.registry = NMSStorage.getInstance().getDataWatcherRegistry();
     }
@@ -41,16 +40,16 @@ public class DataWatcherHelper {
      * @return  armor stand flags position based on server version
      */
     private int getArmorStandFlagsPosition() {
-        if (TAB.getInstance().getServerVersion().getMinorVersion() >= 17) {
-            //1.17.x, 1.18.x
+        if (TabAPI.getInstance().getServerVersion().getMinorVersion() >= 17) {
+            //1.17.x, 1.18.x, 1.19.x
             return 15;
-        } else if (TAB.getInstance().getServerVersion().getMinorVersion() >= 15) {
+        } else if (TabAPI.getInstance().getServerVersion().getMinorVersion() >= 15) {
             //1.15.x, 1.16.x
             return 14;
-        } else if (TAB.getInstance().getServerVersion().getMinorVersion() >= 14) {
+        } else if (TabAPI.getInstance().getServerVersion().getMinorVersion() >= 14) {
             //1.14.x
             return 13;
-        } else if (TAB.getInstance().getServerVersion().getMinorVersion() >= 10) {
+        } else if (TabAPI.getInstance().getServerVersion().getMinorVersion() >= 10) {
             //1.10.x - 1.13.x
             return 11;
         } else {
@@ -78,26 +77,23 @@ public class DataWatcherHelper {
      *          client version
      */
     public void setCustomName(String customName, ProtocolVersion clientVersion) {
-        Preconditions.checkNotNull(customName, "customName");
-        Preconditions.checkNotNull(clientVersion, "clientVersion");
-        if (TAB.getInstance().getServerVersion().getMinorVersion() >= 13) {
+        if (TabAPI.getInstance().getServerVersion().getMinorVersion() >= 13) {
             try {
                 data.setValue(new DataWatcherObject(2, registry.getOptionalComponent()), Optional.ofNullable(((BukkitPacketBuilder)TAB.getInstance().getPlatform().getPacketBuilder()).toNMSComponent(IChatBaseComponent.optimizedComponent(customName), clientVersion)));
             } catch (ReflectiveOperationException e) {
                 TAB.getInstance().getErrorManager().printError("Failed to create component", e);
             }
-        } else if (TAB.getInstance().getServerVersion().getMinorVersion() >= 8){
+        } else if (TabAPI.getInstance().getServerVersion().getMinorVersion() >= 8){
             data.setValue(new DataWatcherObject(2, registry.getString()), 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, registry.getString()), cutName);
+            if (TabAPI.getInstance().getServerVersion().getMinorVersion() >= 6){
+                data.setValue(new DataWatcherObject(10, null), cutName);
             } else {
-                data.setValue(new DataWatcherObject(5, registry.getString()), cutName);
+                data.setValue(new DataWatcherObject(5, null), cutName);
             }
         }
-
     }
 
     /**
@@ -107,10 +103,10 @@ public class DataWatcherHelper {
      *          if visible or not
      */
     public void setCustomNameVisible(boolean visible) {
-        if (TAB.getInstance().getServerVersion().getMinorVersion() >= 9) {
+        if (TabAPI.getInstance().getServerVersion().getMinorVersion() >= 9) {
             data.setValue(new DataWatcherObject(3, registry.getBoolean()), visible);
         } else {
-            data.setValue(new DataWatcherObject(3, registry.getByte()), (byte)(visible?1:0));
+            data.setValue(new DataWatcherObject(3, null), (byte)(visible?1:0));
         }
     }
 
@@ -121,10 +117,10 @@ public class DataWatcherHelper {
      *          health of entity
      */
     public void setHealth(float health) {
-        if (TAB.getInstance().getServerVersion().getMinorVersion() >= 6) {
+        if (TabAPI.getInstance().getServerVersion().getMinorVersion() >= 6) {
             data.setValue(new DataWatcherObject(6, registry.getFloat()), health);
         } else {
-            data.setValue(new DataWatcherObject(16, registry.getInteger()), (int)health);
+            data.setValue(new DataWatcherObject(16, null), (int)health);
         }
     }
 
@@ -137,4 +133,15 @@ public class DataWatcherHelper {
     public void setArmorStandFlags(byte flags) {
         data.setValue(new DataWatcherObject(armorStandFlagsPosition, registry.getByte()), 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

@@ -1,8 +1,8 @@
 package me.neznamy.tab.platforms.bukkit.nms.datawatcher;
 
+import me.neznamy.tab.api.TabAPI;
 import me.neznamy.tab.api.util.Preconditions;
 import me.neznamy.tab.platforms.bukkit.nms.NMSStorage;
-import me.neznamy.tab.shared.TAB;
 
 public class DataWatcherItem {
     
@@ -38,7 +38,7 @@ public class DataWatcherItem {
      */
     public static DataWatcherItem fromNMS(Object nmsItem) throws ReflectiveOperationException {
         NMSStorage nms = NMSStorage.getInstance();
-        if (TAB.getInstance().getServerVersion().getMinorVersion() >= 9) {
+        if (TabAPI.getInstance().getServerVersion().getMinorVersion() >= 9) {
             Object nmsObject = nms.DataWatcherItem_TYPE.get(nmsItem);
             return new DataWatcherItem(new DataWatcherObject(nms.DataWatcherObject_SLOT.getInt(nmsObject), nms.DataWatcherObject_SERIALIZER.get(nmsObject)), nms.DataWatcherItem_VALUE.get(nmsItem));
         } else {

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

@@ -1,121 +1,52 @@
 package me.neznamy.tab.platforms.bukkit.nms.datawatcher;
 
-import java.lang.reflect.Field;
-import java.lang.reflect.Modifier;
-import java.util.HashMap;
-import java.util.Map;
-
 import me.neznamy.tab.platforms.bukkit.nms.NMSStorage;
 
+import java.util.Map;
+
 /**
  * A class representing the n.m.s.DataWatcherRegistry class to make work with it much easier
  */
 public class DataWatcherRegistry {
 
     private Object registryByte;
-    private Object registryShort;
-    private Object registryInteger;
     private Object registryFloat;
     private Object registryString;
-    private Object registryIChatBaseComponent;
     private Object registryOptionalIChatBaseComponent;
-    private Object registryOptionalItemStack;
-    private Object registryItemStack;
-    private Object registryOptionalIBlockData;
     private Object registryBoolean;
-    private Object registryParticleParam;
-    private Object registryVector3f;
-    private Object registryBlockPosition;
-    private Object registryOptionalBlockPosition;
-    private Object registryEnumDirection;
-    private Object registryOptionalUUID;
-    private Object registryNBTTagCompound;
-    private Object registryVillagerData;
-    private Object registryOptionalInt;
-    private Object registryEntityPose;
 
     /**
      * Initializes required NMS classes and fields
      */
     public DataWatcherRegistry(NMSStorage nms) {
         if (nms.getMinorVersion() >= 9) {
-            Map<String, Object> fields = getStaticFields(nms.DataWatcherRegistry, nms);
-            registryByte = fields.get("a");
-            registryInteger = fields.get("b");
-            registryFloat = fields.get("c");
-            registryString = fields.get("d");
-            registryIChatBaseComponent = fields.get("e");
-            if (nms.getMinorVersion() >= 13) {
-                registryOptionalIChatBaseComponent = fields.get("f");
-                registryItemStack = fields.get("g");
-                registryOptionalIBlockData = fields.get("h");
-                registryBoolean = fields.get("i");
-                registryParticleParam = fields.get("j");
-                registryVector3f = fields.get("k");
-                registryBlockPosition = fields.get("l");
-                registryOptionalBlockPosition = fields.get("m");
-                registryEnumDirection = fields.get("n");
-                registryOptionalUUID = fields.get("o");
-                registryNBTTagCompound = fields.get("p");
-                if (nms.getMinorVersion() >= 15) {
-                    registryVillagerData = fields.get("q");
-                    registryOptionalInt = fields.get("r");
-                    registryEntityPose = fields.get("s");
+            Map<String, Object> fields = nms.getStaticFields(nms.DataWatcherRegistry);
+            if (fields.containsKey("a")) {
+                // Bukkit mapping
+                registryByte = fields.get("a");
+                registryFloat = fields.get("c");
+                registryString = fields.get("d");
+                if (nms.getMinorVersion() >= 13) {
+                    registryOptionalIChatBaseComponent = fields.get("f");
+                    registryBoolean = fields.get("i");
+                } else {
+                    registryBoolean = fields.get("h");
                 }
             } else {
-                registryOptionalIBlockData = fields.get("g");
-                registryBoolean = fields.get("h");
-                registryVector3f = fields.get("i");
-                registryBlockPosition = fields.get("j");
-                registryOptionalBlockPosition = fields.get("k");
-                registryEnumDirection = fields.get("l");
-                registryOptionalUUID = fields.get("m");
-                if (nms.getMinorVersion() >= 12) {
-                    registryNBTTagCompound = fields.get("n");
-                }
-                if (nms.getMinorVersion() >= 11) {
-                    registryItemStack = fields.get("f");
-                } else {
-                    registryOptionalItemStack = fields.get("f");
-                }
+                // Mojang mapping
+                registryByte = fields.get("BYTE");
+                registryFloat = fields.get("FLOAT");
+                registryString = fields.get("STRING");
+                registryOptionalIChatBaseComponent = fields.get("OPTIONAL_COMPONENT");
+                registryBoolean = fields.get("BOOLEAN");
             }
         }
     }
 
-    /**
-     * Gets values of all static fields in a class
-     *
-     * @param   clazz
-     *          class to return field values from
-     * @return  map of values
-     */
-    private Map<String, Object> getStaticFields(Class<?> clazz, NMSStorage nms){
-        Map<String, Object> fields = new HashMap<>();
-        for (Field field : clazz.getDeclaredFields()) {
-            if (Modifier.isStatic(field.getModifiers())) {
-                nms.setAccessible(field);
-                try {
-                    fields.put(field.getName(), field.get(null));
-                } catch (IllegalAccessException e) {
-                    //this will never happen
-                }
-            }
-        }
-        return fields;
-    }
-
     public Object getByte() {
         return registryByte;
     }
 
-    public Object getShort() {
-        return registryShort;
-    }
-
-    public Object getInteger() {
-        return registryInteger;
-    }
-
     public Object getFloat() {
         return registryFloat;
     }
@@ -124,67 +55,11 @@ public class DataWatcherRegistry {
         return registryString;
     }
 
-    public Object getComponent() {
-        return registryIChatBaseComponent;
-    }
-
     public Object getOptionalComponent() {
         return registryOptionalIChatBaseComponent;
     }
 
-    public Object getOptionalItemStack() {
-        return registryOptionalItemStack;
-    }
-
-    public Object getItemStack() {
-        return registryItemStack;
-    }
-
-    public Object getOptionalIBlockData() {
-        return registryOptionalIBlockData;
-    }
-
     public Object getBoolean() {
         return registryBoolean;
     }
-
-    public Object getParticleParam() {
-        return registryParticleParam;
-    }
-
-    public Object getVector3f() {
-        return registryVector3f;
-    }
-
-    public Object getBlockPosition() {
-        return registryBlockPosition;
-    }
-
-    public Object getOptionalBlockPosition() {
-        return registryOptionalBlockPosition;
-    }
-
-    public Object getEnumDirection() {
-        return registryEnumDirection;
-    }
-
-    public Object getOptionalUUID() {
-        return registryOptionalUUID;
-    }
-
-    public Object getNBTTagCompound() {
-        return registryNBTTagCompound;
-    }
-
-    public Object getVillagerData() {
-        return registryVillagerData;
-    }
-
-    public Object getOptionalInt() {
-        return registryOptionalInt;
-    }
-
-    public Object getEntityPose() {
-        return registryEntityPose;
-    }
 }

bukkit/src/main/java/me/neznamy/tab/platforms/bukkit/permission/Vault.java

@@ -1,6 +1,6 @@
 package me.neznamy.tab.platforms.bukkit.permission;
 
-import me.neznamy.tab.shared.TabConstants;
+import me.neznamy.tab.api.TabConstants;
 import org.bukkit.entity.Player;
 
 import me.neznamy.tab.api.TabPlayer;
@@ -30,7 +30,7 @@ public class Vault extends PermissionPlugin {
 
     @Override
     public String getPrimaryGroup(TabPlayer p) {
-        if (getName().equals("SuperPerms")) return TabConstants.DEFAULT_GROUP; //Vault's dummy implementation throws exception on every request
+        if (getName().equals("SuperPerms")) return TabConstants.NO_GROUP; //Vault's dummy implementation throws exception on every request
         return permission.getPrimaryGroup((Player) p.getPlayer());
     }
 

bukkit/src/main/resources/bukkitconfig.yml

@@ -55,7 +55,6 @@ scoreboard-teams:
     enabled: false
     use-marker-tag-for-1-8-x-clients: false
     disable-on-boats: true
-    space-between-lines: 0.22
     disable-in-worlds:
       - disabledworld
     dynamic-lines:
@@ -137,7 +136,7 @@ scoreboard:
       lines:
         - "%animation:MyAnimation1%"
         - "&6Online:"
-        - "* &eOnline&7: &f%online%&7/&4%maxplayers%"
+        - "* &eOnline&7: &f%online%"
         - "* &eCurrent World&7: &f%worldonline%"
         - "* &eStaff&7: &f%staffonline%"
         - " "

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

@@ -1,8 +1,7 @@
 package me.neznamy.tab.platforms.bungeecord;
 
-import me.neznamy.tab.shared.TAB;
-import me.neznamy.tab.shared.TabConstants;
-import me.neznamy.tab.shared.proxy.ProxyPlatform;
+import me.neznamy.tab.api.TabAPI;
+import me.neznamy.tab.api.TabConstants;
 import net.md_5.bungee.api.connection.ProxiedPlayer;
 import net.md_5.bungee.api.event.ChatEvent;
 import net.md_5.bungee.api.event.PlayerDisconnectEvent;
@@ -16,6 +15,12 @@ import net.md_5.bungee.event.EventHandler;
  */
 public class BungeeEventListener implements Listener {
 
+    private final BungeePlatform platform;
+
+    public BungeeEventListener(BungeePlatform platform) {
+        this.platform = platform;
+    }
+
     /**
      * Disconnect event listener to forward the event to all features
      *
@@ -24,9 +29,9 @@ public class BungeeEventListener implements Listener {
      */
     @EventHandler
     public void onQuit(PlayerDisconnectEvent e){
-        if (TAB.getInstance().isDisabled()) return;
-        TAB.getInstance().getCPUManager().runTask(() ->
-                TAB.getInstance().getFeatureManager().onQuit(TAB.getInstance().getPlayer(e.getPlayer().getUniqueId())));
+        if (TabAPI.getInstance().isPluginDisabled()) return;
+        TabAPI.getInstance().getThreadManager().runTask(() ->
+                TabAPI.getInstance().getFeatureManager().onQuit(TabAPI.getInstance().getPlayer(e.getPlayer().getUniqueId())));
     }
 
     /**
@@ -37,12 +42,12 @@ public class BungeeEventListener implements Listener {
      */
     @EventHandler
     public void onSwitch(ServerSwitchEvent e){
-        if (TAB.getInstance().isDisabled()) return;
-        TAB.getInstance().getCPUManager().runTask(() -> {
-            if (TAB.getInstance().getPlayer(e.getPlayer().getUniqueId()) == null) {
-                TAB.getInstance().getFeatureManager().onJoin(new BungeeTabPlayer(e.getPlayer()));
+        if (TabAPI.getInstance().isPluginDisabled()) return;
+        TabAPI.getInstance().getThreadManager().runTask(() -> {
+            if (TabAPI.getInstance().getPlayer(e.getPlayer().getUniqueId()) == null) {
+                TabAPI.getInstance().getFeatureManager().onJoin(new BungeeTabPlayer(e.getPlayer()));
             } else {
-                TAB.getInstance().getFeatureManager().onServerChange(e.getPlayer().getUniqueId(), e.getPlayer().getServer().getInfo().getName());
+                TabAPI.getInstance().getFeatureManager().onServerChange(e.getPlayer().getUniqueId(), e.getPlayer().getServer().getInfo().getName());
             }
         });
     }
@@ -55,8 +60,9 @@ public class BungeeEventListener implements Listener {
      */
     @EventHandler
     public void onChat(ChatEvent e) {
-        if (TAB.getInstance().isDisabled()) return;
-        if (e.getMessage().startsWith("/") && TAB.getInstance().getFeatureManager().onCommand(TAB.getInstance().getPlayer(((ProxiedPlayer)e.getSender()).getUniqueId()), e.getMessage())) e.setCancelled(true);
+        if (TabAPI.getInstance().isPluginDisabled()) return;
+        if (e.isCommand() && TabAPI.getInstance().getFeatureManager().onCommand(TabAPI.getInstance().getPlayer(
+                ((ProxiedPlayer)e.getSender()).getUniqueId()), e.getMessage())) e.setCancelled(true);
     }
 
     /**
@@ -70,7 +76,7 @@ public class BungeeEventListener implements Listener {
         if (!event.getTag().equals(TabConstants.PLUGIN_MESSAGE_CHANNEL_NAME)) return;
         if (event.getReceiver() instanceof ProxiedPlayer) {
             event.setCancelled(true);
-            ((ProxyPlatform)TAB.getInstance().getPlatform()).getPluginMessageHandler().onPluginMessage(
+            platform.getPluginMessageHandler().onPluginMessage(
                     ((ProxiedPlayer) event.getReceiver()).getUniqueId(), event.getData());
         }
     }

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

@@ -10,16 +10,10 @@ import me.neznamy.tab.api.protocol.*;
 import me.neznamy.tab.api.protocol.PacketPlayOutPlayerInfo.EnumGamemode;
 import me.neznamy.tab.api.protocol.PacketPlayOutPlayerInfo.EnumPlayerInfoAction;
 import me.neznamy.tab.api.protocol.PacketPlayOutPlayerInfo.PlayerInfoData;
-import net.md_5.bungee.protocol.packet.BossBar;
-import net.md_5.bungee.protocol.packet.Chat;
-import net.md_5.bungee.protocol.packet.PlayerListHeaderFooter;
-import net.md_5.bungee.protocol.packet.PlayerListItem;
+import net.md_5.bungee.protocol.Property;
+import net.md_5.bungee.protocol.packet.*;
 import net.md_5.bungee.protocol.packet.PlayerListItem.Item;
-import net.md_5.bungee.protocol.packet.ScoreboardDisplay;
-import net.md_5.bungee.protocol.packet.ScoreboardObjective;
 import net.md_5.bungee.protocol.packet.ScoreboardObjective.HealthDisplay;
-import net.md_5.bungee.protocol.packet.ScoreboardScore;
-import net.md_5.bungee.protocol.packet.Team;
 
 /**
  * Packet builder for BungeeCord platform
@@ -40,7 +34,11 @@ public class BungeePacketBuilder extends PacketBuilder {
 
     @Override
     public Object build(PacketPlayOutChat packet, ProtocolVersion clientVersion) {
-        return new Chat(packet.getMessage().toString(clientVersion), (byte) packet.getType().ordinal());
+        if (clientVersion.getMinorVersion() >= 19) {
+            return new SystemChat(packet.getMessage().toString(clientVersion), (byte) packet.getType().ordinal());
+        } else {
+            return new Chat(packet.getMessage().toString(clientVersion), (byte) packet.getType().ordinal());
+        }
     }
 
     @Override
@@ -55,14 +53,14 @@ public class BungeePacketBuilder extends PacketBuilder {
                     item.setDisplayName(data.getDisplayName().toLegacyText());
                 }
             } else if (clientVersion.getMinorVersion() < 8) {
-                item.setDisplayName(data.getName()); //avoiding NPE, 1.7 client requires this, 1.8 added a leading boolean
+                item.setDisplayName(String.valueOf(data.getName())); //avoiding NPE, 1.7 client requires this, 1.8 added a leading boolean
             }
             if (data.getGameMode() != null) item.setGamemode(data.getGameMode().ordinal()-1);
             item.setPing(data.getLatency());
             if (data.getSkin() != null) {
-                item.setProperties(new String[][]{{"textures", data.getSkin().getValue(), data.getSkin().getSignature()}});
+                item.setProperties(new Property[]{new Property("textures", data.getSkin().getValue(), data.getSkin().getSignature())});
             } else {
-                item.setProperties(new String[0][0]);
+                item.setProperties(new Property[0]);
             }
             item.setUsername(data.getName());
             item.setUuid(data.getUniqueId());
@@ -109,7 +107,7 @@ public class BungeePacketBuilder extends PacketBuilder {
         PlayerListItem item = (PlayerListItem) bungeePacket;
         List<PlayerInfoData> listData = new ArrayList<>();
         for (Item i : item.getItems()) {
-            Skin skin = i.getProperties() == null || i.getProperties().length == 0 ? null : new Skin(i.getProperties()[0][1], i.getProperties()[0][2]);
+            Skin skin = i.getProperties() == null || i.getProperties().length == 0 ? null : new Skin(i.getProperties()[0].getValue(), i.getProperties()[0].getSignature());
             listData.add(new PlayerInfoData(i.getUsername(), i.getUuid(), skin, i.getPing(), EnumGamemode.VALUES[i.getGamemode()+1], IChatBaseComponent.deserialize(i.getDisplayName())));
         }
         return new PacketPlayOutPlayerInfo(EnumPlayerInfoAction.valueOf(item.getAction().toString().replace("GAMEMODE", "GAME_MODE")), listData);

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

@@ -7,9 +7,8 @@ import io.netty.channel.ChannelHandlerContext;
 import io.netty.channel.ChannelPromise;
 import me.neznamy.tab.api.TabFeature;
 import me.neznamy.tab.api.TabPlayer;
-import me.neznamy.tab.api.util.Preconditions;
 import me.neznamy.tab.shared.TAB;
-import me.neznamy.tab.shared.TabConstants;
+import me.neznamy.tab.api.TabConstants;
 import me.neznamy.tab.shared.features.PipelineInjector;
 import me.neznamy.tab.shared.features.redis.RedisPlayer;
 import net.md_5.bungee.api.connection.ProxiedPlayer;
@@ -22,11 +21,15 @@ import java.util.Collection;
 import java.util.function.Function;
 import java.util.function.Supplier;
 
+/**
+ * Pipeline injection to secure proper functionality
+ * of some features by preventing other plugins
+ * from overriding it.
+ */
 @SuppressWarnings("unchecked")
 public class BungeePipelineInjector extends PipelineInjector {
 
-    //packets that must be deserialized and BungeeCord does not do it automatically
-
+    /** Packets used by the plugin that must be deserialized and BungeeCord does not do it automatically */
     private final Class<? extends DefinedPacket>[] extraPacketClasses = new Class[]{Team.class, ScoreboardDisplay.class, ScoreboardObjective.class};
     private final Supplier<DefinedPacket>[] extraPacketSuppliers = new Supplier[]{Team::new, ScoreboardDisplay::new, ScoreboardObjective::new};
 
@@ -47,7 +50,7 @@ public class BungeePipelineInjector extends PipelineInjector {
      */
     public class BungeeChannelDuplexHandler extends ChannelDuplexHandler {
 
-        //injected player
+        /** Injected player */
         protected final TabPlayer player;
 
         /**
@@ -57,7 +60,6 @@ public class BungeePipelineInjector extends PipelineInjector {
          *          player to inject
          */
         public BungeeChannelDuplexHandler(TabPlayer player) {
-            Preconditions.checkNotNull(player, "player");
             this.player = player;
         }
 
@@ -70,7 +72,9 @@ public class BungeePipelineInjector extends PipelineInjector {
                     return;
                 case "Team":
                     if (antiOverrideTeams) {
+                        long time = System.nanoTime();
                         modifyPlayers((Team) packet);
+                        TAB.getInstance().getCPUManager().addTime("NameTags", TabConstants.CpuUsageCategory.ANTI_OVERRIDE, System.nanoTime()-time);
                     }
                     break;
                 case "ScoreboardDisplay":
@@ -93,7 +97,7 @@ public class BungeePipelineInjector extends PipelineInjector {
             try {
                 super.write(context, packet, channelPromise);
             } catch (Exception e) {
-                TAB.getInstance().getErrorManager().printError("Failed to forward packet " + packet.getClass().getSimpleName() + " to " + player.getName(), e);
+                TAB.getInstance().getErrorManager().printError(String.format("Failed to forward packet %s to %s", packet.getClass().getSimpleName(), player.getName()), e);
             }
         }
 
@@ -104,8 +108,7 @@ public class BungeePipelineInjector extends PipelineInjector {
          *          packet to modify
          */
         private void modifyPlayers(Team packet){
-            long time = System.nanoTime();
-            if (packet.getPlayers() == null) return;
+            if (packet.getMode() == 1 || packet.getMode() == 2 || packet.getMode() == 4) return;
             Collection<String> col = Lists.newArrayList(packet.getPlayers());
             for (TabPlayer p : TAB.getInstance().getOnlinePlayers()) {
                 if (col.contains(p.getNickname()) && !((TabFeature)TAB.getInstance().getTeamManager()).isDisabledPlayer(p) &&
@@ -124,10 +127,14 @@ public class BungeePipelineInjector extends PipelineInjector {
                 }
             }
             packet.setPlayers(col.toArray(new String[0]));
-            TAB.getInstance().getCPUManager().addTime("NameTags", TabConstants.CpuUsageCategory.ANTI_OVERRIDE, System.nanoTime()-time);
         }
     }
 
+    /**
+     * Channel duplex handler override if features using packets that must be
+     * deserialized manually are used. If they are disabled, deserialization is
+     * disabled for better performance.
+     */
     public class DeserializableBungeeChannelDuplexHandler extends BungeeChannelDuplexHandler {
 
         /**
@@ -144,7 +151,7 @@ public class BungeePipelineInjector extends PipelineInjector {
         public void write(ChannelHandlerContext context, Object packet, ChannelPromise channelPromise) {
             long time = System.nanoTime();
             Object modifiedPacket = packet instanceof ByteBuf ? deserialize((ByteBuf) packet) : packet;
-            TAB.getInstance().getCPUManager().addTime("Packet deserializing", TabConstants.CpuUsageCategory.BYTE_BUF, System.nanoTime()-time);
+            TAB.getInstance().getCPUManager().addTime(TabConstants.Feature.PACKET_DESERIALIZING, TabConstants.CpuUsageCategory.BYTE_BUF, System.nanoTime()-time);
             super.write(context, modifiedPacket, channelPromise);
         }
 

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

@@ -1,12 +1,8 @@
 package me.neznamy.tab.platforms.bungeecord;
 
 import com.imaginarycode.minecraft.redisbungee.RedisBungeeAPI;
-import me.neznamy.tab.api.TabPlayer;
-import me.neznamy.tab.api.util.Preconditions;
-import me.neznamy.tab.platforms.bungeecord.event.TabLoadEvent;
-import me.neznamy.tab.platforms.bungeecord.event.TabPlayerLoadEvent;
 import me.neznamy.tab.shared.TAB;
-import me.neznamy.tab.shared.TabConstants;
+import me.neznamy.tab.api.TabConstants;
 import me.neznamy.tab.shared.proxy.ProxyPlatform;
 import net.md_5.bungee.api.ProxyServer;
 import net.md_5.bungee.api.connection.ProxiedPlayer;
@@ -18,7 +14,7 @@ import net.md_5.bungee.api.plugin.Plugin;
 public class BungeePlatform extends ProxyPlatform {
 
     /**
-     * Constructs new instance with given parameter
+     * Constructs new instance
      */
     public BungeePlatform() {
         super(new BungeePacketBuilder());
@@ -29,9 +25,9 @@ public class BungeePlatform extends ProxyPlatform {
         TAB tab = TAB.getInstance();
         if (tab.getConfiguration().isPipelineInjection())
             tab.getFeatureManager().registerFeature(TabConstants.Feature.PIPELINE_INJECTION, new BungeePipelineInjector());
-        tab.getPlaceholderManager().registerPlayerPlaceholder("%displayname%", 500, p -> ((ProxiedPlayer) p.getPlayer()).getDisplayName());
+        tab.getPlaceholderManager().registerPlayerPlaceholder(TabConstants.Placeholder.DISPLAY_NAME, 500, p -> ((ProxiedPlayer) p.getPlayer()).getDisplayName());
         super.loadFeatures();
-        if (ProxyServer.getInstance().getPluginManager().getPlugin("RedisBungee") != null) {
+        if (ProxyServer.getInstance().getPluginManager().getPlugin(TabConstants.Plugin.REDIS_BUNGEE) != null) {
             if (RedisBungeeAPI.getRedisBungeeApi() != null) {
                 tab.getFeatureManager().registerFeature(TabConstants.Feature.REDIS_BUNGEE, new RedisBungeeSupport());
             } else {
@@ -43,19 +39,8 @@ public class BungeePlatform extends ProxyPlatform {
         }
     }
 
-    @Override
-    public void callLoadEvent() {
-        ProxyServer.getInstance().getPluginManager().callEvent(new TabLoadEvent());
-    }
-    
-    @Override
-    public void callLoadEvent(TabPlayer player) {
-        ProxyServer.getInstance().getPluginManager().callEvent(new TabPlayerLoadEvent(player));
-    }
-
     @Override
     public String getPluginVersion(String plugin) {
-        Preconditions.checkNotNull(plugin, "plugin");
         Plugin pl = ProxyServer.getInstance().getPluginManager().getPlugin(plugin);
         return pl == null ? null : pl.getDescription().getVersion();
     }

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

@@ -1,45 +1,69 @@
 package me.neznamy.tab.platforms.bungeecord;
 
 import de.myzelyam.api.vanish.BungeeVanishAPI;
+import io.netty.channel.Channel;
 import me.neznamy.tab.api.ProtocolVersion;
+import me.neznamy.tab.api.TabConstants;
 import me.neznamy.tab.api.protocol.Skin;
 import me.neznamy.tab.api.util.Preconditions;
 import me.neznamy.tab.shared.TAB;
-import me.neznamy.tab.shared.TabConstants;
 import me.neznamy.tab.shared.proxy.ProxyTabPlayer;
-import net.md_5.bungee.UserConnection;
+import net.md_5.bungee.api.ProxyConfig;
 import net.md_5.bungee.api.ProxyServer;
 import net.md_5.bungee.api.connection.ProxiedPlayer;
-import net.md_5.bungee.connection.InitialHandler;
-import net.md_5.bungee.connection.LoginResult;
-import net.md_5.bungee.netty.ChannelWrapper;
 import net.md_5.bungee.protocol.DefinedPacket;
 import net.md_5.bungee.protocol.Protocol;
 
 import java.lang.reflect.Field;
+import java.lang.reflect.InvocationTargetException;
 import java.lang.reflect.Method;
 
 /**
- * TabPlayer for BungeeCord
+ * TabPlayer implementation for BungeeCord
  */
 public class BungeeTabPlayer extends ProxyTabPlayer {
 
-    //bungee internals to get player channel
+    /** Inaccessible bungee internals */
+    private static Method InitialHandler_getLoginProfile;
+    private static Method ChannelWrapper_getHandle;
+    private static Method LoginResult_Property_getValue;
+    private static Method LoginResult_Property_getSignature;
+    private static Method LoginResult_getProperties;
+    private static Method UserConnection_getGamemode;
     private static Field wrapperField;
     private static Object directionData;
     private static Method getId;
 
+    /** Rewriting offline tablist uuids coming from backend servers to online uuids on online servers */
+    private static boolean tablistRewriteEnabled = true;
+
     static {
         try {
+            Class<?> initialHandler = Class.forName("net.md_5.bungee.connection.InitialHandler");
+            InitialHandler_getLoginProfile = initialHandler.getMethod("getLoginProfile");
+            Class<?> channelWrapper = Class.forName("net.md_5.bungee.netty.ChannelWrapper");
+            ChannelWrapper_getHandle = channelWrapper.getMethod("getHandle");
+            Class<?> loginResult = Class.forName("net.md_5.bungee.connection.LoginResult");
+            Class<?> loginResult_Property = Class.forName("net.md_5.bungee.protocol.Property");
+            LoginResult_Property_getValue = loginResult_Property.getMethod("getValue");
+            LoginResult_Property_getSignature = loginResult_Property.getMethod("getSignature");
+            LoginResult_getProperties = loginResult.getMethod("getProperties");
+            Class<?> userConnection = Class.forName("net.md_5.bungee.UserConnection");
+            UserConnection_getGamemode = userConnection.getMethod("getGamemode");
             Field f = Protocol.class.getDeclaredField("TO_CLIENT");
             f.setAccessible(true);
             directionData = f.get(Protocol.GAME);
             getId = directionData.getClass().getDeclaredMethod("getId", Class.class, int.class);
             getId.setAccessible(true);
-            wrapperField = InitialHandler.class.getDeclaredField("ch");
+            wrapperField = initialHandler.getDeclaredField("ch");
             wrapperField.setAccessible(true);
         } catch (ReflectiveOperationException e) {
-            TAB.getInstance().getErrorManager().criticalError("Failed to initialize fields for packet analysis", e);
+            TAB.getInstance().getErrorManager().criticalError("Failed to initialize bungee internal fields", e);
+        }
+        try {
+            tablistRewriteEnabled = !(boolean) ProxyConfig.class.getMethod("isDisableTabListRewrite").invoke(ProxyServer.getInstance().getConfig());
+        } catch (ReflectiveOperationException e) {
+            // not Waterfall, always true on BungeeCord
         }
     }
 
@@ -50,10 +74,10 @@ public class BungeeTabPlayer extends ProxyTabPlayer {
      *          BungeeCord player
      */
     public BungeeTabPlayer(ProxiedPlayer p) {
-        super(p, p.getUniqueId(), p.getName(), p.getServer() != null ? p.getServer().getInfo().getName() : "-", -1);
+        super(p, p.getUniqueId(), p.getName(), p.getServer() != null ? p.getServer().getInfo().getName() : "-", -1, tablistRewriteEnabled);
         try {
-            channel = ((ChannelWrapper) wrapperField.get(getPlayer().getPendingConnection())).getHandle();
-        } catch (IllegalAccessException e) {
+            channel = (Channel) ChannelWrapper_getHandle.invoke(wrapperField.get(getPlayer().getPendingConnection()));
+        } catch (IllegalAccessException | InvocationTargetException e) {
             TAB.getInstance().getErrorManager().criticalError("Failed to get channel of " + getPlayer().getName(), e);
         }
     }
@@ -81,9 +105,17 @@ public class BungeeTabPlayer extends ProxyTabPlayer {
 
     @Override
     public Skin getSkin() {
-        LoginResult loginResult = ((InitialHandler)getPlayer().getPendingConnection()).getLoginProfile();
-        if (loginResult == null || loginResult.getProperties() == null || loginResult.getProperties().length == 0) return null;
-        return new Skin(loginResult.getProperties()[0].getValue(), loginResult.getProperties()[0].getSignature());
+        try {
+            Object loginResult = InitialHandler_getLoginProfile.invoke(getPlayer().getPendingConnection());
+            if (loginResult == null) return null;
+            Object[] properties = (Object[]) LoginResult_getProperties.invoke(loginResult);
+            if (properties == null || properties.length == 0) return null;
+            return new Skin((String) LoginResult_Property_getValue.invoke(properties[0]),
+                    (String) LoginResult_Property_getSignature.invoke(properties[0]));
+        } catch (ReflectiveOperationException e) {
+            TAB.getInstance().getErrorManager().printError("Failed to get skin of " + getName(), e);
+            return null;
+        }
     }
 
     @Override
@@ -116,9 +148,9 @@ public class BungeeTabPlayer extends ProxyTabPlayer {
     @Override
     public boolean isVanished() {
         try {
-            if (ProxyServer.getInstance().getPluginManager().getPlugin("PremiumVanish") != null && BungeeVanishAPI.isInvisible(getPlayer())) return true;
+            if (ProxyServer.getInstance().getPluginManager().getPlugin(TabConstants.Plugin.PREMIUM_VANISH) != null && BungeeVanishAPI.isInvisible(getPlayer())) return true;
         } catch (Exception e) {
-            TAB.getInstance().getErrorManager().printError("PremiumVanish v" + TAB.getInstance().getPlatform().getPluginVersion("PremiumVanish") +
+            TAB.getInstance().getErrorManager().printError("PremiumVanish v" + TAB.getInstance().getPlatform().getPluginVersion(TabConstants.Plugin.PREMIUM_VANISH) +
                     " generated an error when retrieving vanish status of " + getName(), e);
         }
         return super.isVanished();
@@ -131,7 +163,12 @@ public class BungeeTabPlayer extends ProxyTabPlayer {
 
     @Override
     public int getGamemode() {
-        return ((UserConnection)player).getGamemode();
+        try {
+            return (int) UserConnection_getGamemode.invoke(player);
+        } catch (ReflectiveOperationException e) {
+            TAB.getInstance().getErrorManager().printError("Failed to get gamemode of " + getPlayer().getName(), e);
+            return 0;
+        }
     }
 
     @Override

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

@@ -9,7 +9,7 @@ import me.neznamy.tab.api.ProtocolVersion;
 import me.neznamy.tab.api.TabPlayer;
 import me.neznamy.tab.api.chat.EnumChatFormat;
 import me.neznamy.tab.shared.TAB;
-import me.neznamy.tab.shared.TabConstants;
+import me.neznamy.tab.api.TabConstants;
 import net.md_5.bungee.api.CommandSender;
 import net.md_5.bungee.api.ProxyServer;
 import net.md_5.bungee.api.chat.TextComponent;
@@ -26,17 +26,18 @@ public class Main extends Plugin {
     @Override
     public void onEnable(){
         if (!isVersionSupported()) {
-            getLogger().info(EnumChatFormat.color("&cThe plugin requires BungeeCord build #1330 and up to work. Get it at https://ci.md-5.net/job/BungeeCord/"));
+            getLogger().info(EnumChatFormat.color("&cThe plugin requires BungeeCord build #1637 and up to work. Get it at https://ci.md-5.net/job/BungeeCord/"));
             return;
         }
+        BungeePlatform platform = new BungeePlatform();
         ProxyServer.getInstance().registerChannel(TabConstants.PLUGIN_MESSAGE_CHANNEL_NAME);
-        TAB.setInstance(new TAB(new BungeePlatform(), ProtocolVersion.PROXY, getProxy().getVersion(), getDataFolder(), getLogger()));
-        getProxy().getPluginManager().registerListener(this, new BungeeEventListener());
+        TAB.setInstance(new TAB(platform, ProtocolVersion.PROXY, getProxy().getVersion(), getDataFolder(), getLogger()));
+        getProxy().getPluginManager().registerListener(this, new BungeeEventListener(platform));
         getProxy().getPluginManager().registerCommand(this, new BTABCommand());
         TAB.getInstance().load();
         Metrics metrics = new Metrics(this, 10535);
-        metrics.addCustomChart(new SimplePie("permission_system", () -> TAB.getInstance().getGroupManager().getPlugin().getName()));
-        metrics.addCustomChart(new SimplePie("global_playerlist_enabled", () -> TAB.getInstance().getFeatureManager().isFeatureEnabled(TabConstants.Feature.GLOBAL_PLAYER_LIST) ? "Yes" : "No"));
+        metrics.addCustomChart(new SimplePie(TabConstants.MetricsChart.PERMISSION_SYSTEM, () -> TAB.getInstance().getGroupManager().getPlugin().getName()));
+        metrics.addCustomChart(new SimplePie(TabConstants.MetricsChart.GLOBAL_PLAYER_LIST_ENABLED, () -> TAB.getInstance().getFeatureManager().isFeatureEnabled(TabConstants.Feature.GLOBAL_PLAYER_LIST) ? "Yes" : "No"));
     }
 
     /**
@@ -46,7 +47,7 @@ public class Main extends Plugin {
      */
     private boolean isVersionSupported() {
         try {
-            Class.forName("net.md_5.bungee.protocol.packet.ScoreboardObjective$HealthDisplay");
+            Class.forName("net.md_5.bungee.protocol.Property");
             return true;
         } catch (ClassNotFoundException e) {
             return false;
@@ -59,9 +60,9 @@ public class Main extends Plugin {
     }
 
     /**
-     * TAB command for bungeecord
+     * TAB command for BungeeCord
      */
-    public static class BTABCommand extends Command implements TabExecutor {
+    private static class BTABCommand extends Command implements TabExecutor {
 
         /**
          * Constructs new instance
@@ -72,7 +73,7 @@ public class Main extends Plugin {
 
         @Override
         public void execute(CommandSender sender, String[] args) {
-            if (TAB.getInstance().isDisabled()) {
+            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)));
                 }

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

@@ -2,7 +2,7 @@ package me.neznamy.tab.platforms.bungeecord;
 
 import com.imaginarycode.minecraft.redisbungee.RedisBungeeAPI;
 import com.imaginarycode.minecraft.redisbungee.events.PubSubMessageEvent;
-import me.neznamy.tab.shared.TabConstants;
+import me.neznamy.tab.api.TabConstants;
 import me.neznamy.tab.shared.features.redis.RedisSupport;
 import net.md_5.bungee.api.ProxyServer;
 import net.md_5.bungee.api.plugin.Listener;

bungeecord/src/main/java/me/neznamy/tab/platforms/bungeecord/event/TabLoadEvent.java

@@ -1,14 +0,0 @@
-package me.neznamy.tab.platforms.bungeecord.event;
-
-import net.md_5.bungee.api.plugin.Event;
-
-/**
- * Bungee event that is called each time TAB fully loads. This includes server startup, reload and
- * /btab reload
- *
- * @deprecated for removal, use {@link me.neznamy.tab.api.event.plugin.TabLoadEvent}
- */
-@Deprecated
-public class TabLoadEvent extends Event {
-
-}

bungeecord/src/main/java/me/neznamy/tab/platforms/bungeecord/event/TabPlayerLoadEvent.java

@@ -1,23 +0,0 @@
-package me.neznamy.tab.platforms.bungeecord.event;
-
-import me.neznamy.tab.api.TabPlayer;
-import net.md_5.bungee.api.plugin.Event;
-
-/**
- * BungeeCord event that is called when player is successfully loaded after joining. This also includes plugin reloading.
- *
- * @deprecated for removal, use {@link me.neznamy.tab.api.event.player.PlayerLoadEvent}
- */
-@Deprecated
-public class TabPlayerLoadEvent extends Event {
-
-    private final TabPlayer player;
-    
-    public TabPlayerLoadEvent(TabPlayer player) {
-        this.player = player;
-    }
-    
-    public TabPlayer getPlayer() {
-        return player;
-    }
-}

bungeecord/src/main/resources/proxyconfig.yml

@@ -61,7 +61,6 @@ scoreboard-teams:
     enabled: false
     use-marker-tag-for-1-8-x-clients: false
     disable-on-boats: true
-    space-between-lines: 0.22
     disable-in-worlds:
       - disabledworld
     disable-in-servers:
@@ -154,7 +153,7 @@ scoreboard:
       lines:
         - "%animation:MyAnimation1%"
         - "&6Online:"
-        - "* &eOnline&7: &f%online%&7/&4%maxplayers%"
+        - "* &eOnline&7: &f%online%"
         - "* &eCurrent World&7: &f%worldonline%"
         - "* &eStaff&7: &f%staffonline%"
         - " "
@@ -200,10 +199,10 @@ placeholder-output-replacements:
     "no": ""
   "%essentials_nickname%":
     "%essentials_nickname%": "%player%" # placeholder did not parse correctly, show real name instead
-    
+
   # bukkit-only placeholders used in default groups.yml, doing this as a fix
   "%afk%":
-    "%afk%": "" 
+    "%afk%": ""
   "%vault-prefix%":
     "%vault-prefix%" : ""
   "%vault-suffix%":

gradle.properties

@@ -1,5 +1,5 @@
 # Project properties - we put these here so they can be modified without causing a recompile of the build scripts
-projectVersion=3.1.1
+projectVersion=3.1.3
 
 # Gradle properties
 org.gradle.daemon=true

gradle/libs.versions.toml

@@ -3,12 +3,13 @@ metadata.format.version = "1.1"
 [versions]
 
 # API
-netty = "4.1.75.Final"
+netty = "4.1.78.Final"
 jsonSimple = "1.1.1"
 snakeyaml = "1.30"
 yamlAssist = "1.0.5"
 gson = "2.9.0"
 slf4j = "1.7.36"
+minimessage = "4.11.0"
 
 # General
 luckperms = "5.4"
@@ -19,20 +20,19 @@ event = "3.0.0"
 
 # Platforms
 bukkit = "1.16.5-R0.1-SNAPSHOT"
-bungeecord = "1.18-R0.1-SNAPSHOT"
+bungeecord = "1.19-R0.1-SNAPSHOT"
 krypton = "0.59.2"
-velocity = "1.1.0"
+velocity = "3.0.1"
 
 # Platform extras
-placeholderapi = "2.10.9"
+placeholderapi = "2.11.1"
 vault = "1.7"
-via = "4.0.0"
-authlib = "1.11"
-bstats = "2.2.1"
-libsDisguises = "10.0.26"
-essentials = "2.19.2"
+via = "4.3.1"
+authlib = "1.5.25"
+bstats = "3.0.0"
+essentials = "2.19.4"
 premiumVanish = "2.0.3"
-redisBungee = "0.6.5-SNAPSHOT"
+redisBungee = "0.7.2"
 
 [libraries]
 
@@ -43,6 +43,9 @@ snakeyaml = { group = "org.yaml", name = "snakeyaml", version.ref = "snakeyaml"
 yamlAssist = { group = "me.neznamy", name = "yamlassist", version.ref = "yamlAssist" }
 gson = { group = "com.google.code.gson", name = "gson", version.ref = "gson" }
 slf4j = { group = "org.slf4j", name = "slf4j-api", version.ref = "slf4j"}
+adventureMiniMessage = { group = "net.kyori", name = "adventure-text-minimessage", version.ref = "minimessage" }
+adventureApi = { group = "net.kyori", name = "adventure-api", version.ref = "minimessage" }
+adventureLegacy = { group = "net.kyori", name = "adventure-text-serializer-legacy", version.ref = "minimessage" }
 
 # General
 luckperms = { group = "net.luckperms", name = "api", version.ref = "luckperms" }
@@ -52,8 +55,8 @@ kotlin-stdlib = { group = "org.jetbrains.kotlin", name = "kotlin-stdlib", versio
 event = { group = "net.kyori", name = "event-method", version.ref = "event" }
 
 # Platforms
-bukkit = { group = "com.destroystokyo.paper", name = "paper-api", version.ref = "bukkit" }
-bungeecord = { group = "net.md-5", name = "bungeecord-proxy", version.ref = "bungeecord" }
+bukkit = { group = "org.purpurmc.purpur", name = "purpur-api", version.ref = "bukkit" }
+bungeecord = { group = "net.md-5", name = "bungeecord-api", version.ref = "bungeecord" }
 krypton-api = { group = "org.kryptonmc", name = "krypton-api", version.ref = "krypton" }
 krypton-server = { group = "org.kryptonmc", name = "krypton-server", version.ref = "krypton" }
 krypton-annotationProcessor = { group = "org.kryptonmc", name = "krypton-annotation-processor", version.ref = "krypton" }
@@ -64,10 +67,9 @@ placeholderapi = { group = "me.clip", name = "placeholderapi", version.ref = "pl
 vault = { group = "com.github.MilkBowl", name = "VaultAPI", version.ref = "vault" }
 via = { group = "com.viaversion", name = "viaversion-api", version.ref = "via" }
 authlib = { group = "com.mojang", name = "authlib", version.ref = "authlib" }
-libsDisguises = { group = "LibsDisguises", name = "LibsDisguises", version.ref = "libsDisguises" }
 essentials = { group = "net.essentialsx", name = "EssentialsX", version.ref = "essentials" }
 premiumVanish = { group = "com.github.MyzelYam", name = "PremiumVanishAPI", version.ref = "premiumVanish" }
-redisBungee = { group = "com.imaginarycode.minecraft", name = "RedisBungee", version.ref = "redisBungee" }
+redisBungee = { group = "com.github.limework.redisbungee", name = "RedisBungee-Bungee", version.ref = "redisBungee" }
 
 # Metrics
 bstats-bukkit = { group = "org.bstats", name = "bstats-bukkit", version.ref = "bstats" }

settings.gradle.kts

@@ -3,21 +3,16 @@ enableFeaturePreview("VERSION_CATALOGS")
 
 dependencyResolutionManagement {
     repositories {
-        mavenCentral()
-        maven("https://jitpack.io")
-        maven("https://repo.extendedclip.com/content/repositories/placeholderapi/")
-        maven("https://repo.viaversion.com/")
-        maven("https://repo.aikar.co/content/groups/aikar/")
-        maven("https://repo.md-5.net/content/groups/public/")
-        maven("https://ci.lucko.me/plugin/repository/everything/")
-        maven("https://repo.essentialsx.net/releases/")
-        maven("https://repo.codemc.org/repository/maven-public")
-        maven("https://repo.kryptonmc.org/releases")
-        maven("https://repo.kryptonmc.org/snapshots")
-        maven("https://oss.sonatype.org/content/repositories/snapshots/")
-        maven("https://nexus.velocitypowered.com/repository/maven-public/")
-        maven("https://repo.opencollab.dev/maven-snapshots/")
-        maven("https://papermc.io/repo/repository/maven-public/")
+        mavenCentral() // Netty, SnakeYaml, json-simple, Gson, slf4j, Guava, Kyori event, bStats, AuthLib
+        maven("https://jitpack.io") // PremiumVanish
+        maven("https://repo.extendedclip.com/content/repositories/placeholderapi/") // PlaceholderAPI
+        maven("https://repo.viaversion.com/") // ViaVersion
+        maven("https://repo.essentialsx.net/releases/") // Essentials
+        maven("https://repo.codemc.org/repository/maven-public/") // RedisBungee, BungeeCord
+        maven("https://repo.kryptonmc.org/releases") // YamlAssist, LuckPerms
+        maven("https://repo.opencollab.dev/maven-snapshots/") // Floodgate
+        maven("https://repo.purpurmc.org/snapshots") // Purpur, Vault
+        maven("https://repo.papermc.io/repository/maven-public/") // Velocity
     }
     repositoriesMode.set(RepositoriesMode.FAIL_ON_PROJECT_REPOS)
 }

shared/build.gradle.kts

@@ -1,7 +1,3 @@
-plugins {
-    id("net.kyori.blossom") version "1.2.0"
-}
-
 dependencies {
     api(projects.api)
     api(libs.event) {
@@ -12,9 +8,4 @@ dependencies {
     compileOnlyApi(libs.guava)
     compileOnlyApi(libs.floodgate)
     compileOnlyApi(libs.slf4j)
-}
-
-blossom {
-    replaceToken("@plugin_version@", project.version)
-    replaceTokenIn("src/main/java/me/neznamy/tab/shared/TabConstants.java")
-}
+}

shared/src/main/java/me/neznamy/tab/shared/CpuManager.java

@@ -9,7 +9,6 @@ import java.util.concurrent.atomic.AtomicLong;
 import com.google.common.util.concurrent.ThreadFactoryBuilder;
 
 import me.neznamy.tab.api.TabFeature;
-import me.neznamy.tab.api.task.RepeatingTask;
 import me.neznamy.tab.api.task.ThreadManager;
 
 /**
@@ -18,7 +17,7 @@ import me.neznamy.tab.api.task.ThreadManager;
 public class CpuManager implements ThreadManager {
 
     /** Data reset interval in milliseconds */
-    private static final int BUFFER_SIZE_MILLIS = 10000;
+    private final int BUFFER_SIZE_MILLIS = 10000;
 
     /** Active time in current time period saved as nanoseconds from features */
     private Map<String, Map<String, AtomicLong>> featureUsageCurrent = new ConcurrentHashMap<>();
@@ -48,7 +47,7 @@ public class CpuManager implements ThreadManager {
     private ExecutorService thread = Executors.newSingleThreadExecutor(new ThreadFactoryBuilder().setNameFormat("TAB Processing Thread").build());
 
     /** Thread pool for delayed and repeating tasks to perform sleep before submitting task to main thread */
-    private final ThreadPoolExecutor threadPool = (ThreadPoolExecutor) Executors.newCachedThreadPool(
+    private final ScheduledExecutorService threadPool = Executors.newScheduledThreadPool(20,
             new ThreadFactoryBuilder().setNameFormat("TAB Repeating / Delayed Thread %d").build());
 
     /** Tasks submitted to main thread before plugin was fully enabled */
@@ -359,48 +358,22 @@ public class CpuManager implements ThreadManager {
     }
 
     @Override
-    public RepeatingTask startRepeatingMeasuredTask(int intervalMilliseconds, TabFeature feature, String type, Runnable task) {
-        return new TabRepeatingTask(threadPool, task, feature, type, intervalMilliseconds);
+    public Future<?> startRepeatingMeasuredTask(int intervalMilliseconds, TabFeature feature, String type, Runnable task) {
+        return threadPool.scheduleAtFixedRate(() -> runMeasuredTask(feature, type, task), 0, intervalMilliseconds, TimeUnit.MILLISECONDS);
     }
 
     @Override
-    public RepeatingTask startRepeatingTask(int intervalMilliseconds, Runnable task) {
-        return new TabRepeatingTask(threadPool, task, null, null, intervalMilliseconds);
+    public Future<?> startRepeatingTask(int intervalMilliseconds, Runnable task) {
+        return threadPool.scheduleAtFixedRate(() -> runTask(task), 0, intervalMilliseconds, TimeUnit.MILLISECONDS);
     }
 
     @Override
     public Future<?> runTaskLater(int delayMilliseconds, TabFeature feature, String type, Runnable task) {
-        try {
-            return threadPool.submit(() -> {
-                try {
-                    Thread.sleep(delayMilliseconds);
-                    runMeasuredTask(feature, type, task);
-                } catch (InterruptedException pluginDisabled) {
-                    Thread.currentThread().interrupt();
-                }
-            });
-        } catch (OutOfMemoryError e) {
-            TAB.getInstance().getErrorManager().criticalError("Failed to create new delayed task, active thread count: " +
-                    threadPool.getActiveCount() + " / " + threadPool.getPoolSize(), e);
-            return null;
-        }
+        return threadPool.schedule(() -> runMeasuredTask(feature, type, task), delayMilliseconds, TimeUnit.MILLISECONDS);
     }
 
     @Override
     public Future<?> runTaskLater(int delayMilliseconds, Runnable task) {
-        try {
-            return threadPool.submit(() -> {
-                try {
-                    Thread.sleep(delayMilliseconds);
-                    submit(task);
-                } catch (InterruptedException pluginDisabled) {
-                    Thread.currentThread().interrupt();
-                }
-            });
-        } catch (OutOfMemoryError e) {
-            TAB.getInstance().getErrorManager().criticalError("Failed to create new delayed task, active thread count: " +
-                    threadPool.getActiveCount() + " / " + threadPool.getPoolSize(), e);
-            return null;
-        }
+        return threadPool.schedule(() -> submit(task), delayMilliseconds, TimeUnit.MILLISECONDS);
     }
 }

shared/src/main/java/me/neznamy/tab/shared/DynamicText.java

@@ -110,7 +110,7 @@ public class DynamicText implements Property {
                 rawFormattedValue0 = sb.toString();
             }
         }
-        rawFormattedValue0 = RGBUtils.getInstance().applyFormats(rawFormattedValue0, true);
+        rawFormattedValue0 = RGBUtils.getInstance().applyCleanGradients(rawFormattedValue0);
         rawFormattedValue = EnumChatFormat.color(rawFormattedValue0);
         placeholders = placeholders0.toArray(new String[0]);
         relPlaceholders = relPlaceholders0.toArray(new String[0]);

shared/src/main/java/me/neznamy/tab/shared/ErrorManager.java

@@ -9,6 +9,7 @@ import java.nio.file.Files;
 import java.text.SimpleDateFormat;
 import java.util.*;
 
+import me.neznamy.tab.api.TabConstants;
 import me.neznamy.tab.api.chat.EnumChatFormat;
 import me.neznamy.tab.api.chat.IChatBaseComponent;
 
@@ -108,13 +109,18 @@ public class ErrorManager {
     private synchronized void printError(String message, List<String> error, boolean intoConsoleToo, File file) {
         try {
             if (!file.exists()) Files.createFile(file.toPath());
-            if (file.length() > 1000000) return; //not going over 1 MB
             try (BufferedWriter buf = new BufferedWriter(new FileWriter(file, true))){
                 if (message != null) {
-                    write(buf, "&c[TAB v" + TabConstants.PLUGIN_VERSION + "] ", EnumChatFormat.decolor(message), intoConsoleToo);
+                    if (file.length() < 1000000)
+                        buf.write(dateFormat.format(new Date()) + IChatBaseComponent.fromColoredText("&c[TAB v" + TabConstants.PLUGIN_VERSION + "] ").toRawText() + EnumChatFormat.decolor(message) + System.getProperty("line.separator"));
+                    if (intoConsoleToo || TAB.getInstance().getConfiguration().isDebugMode())
+                        TAB.getInstance().sendConsoleMessage(EnumChatFormat.color("&c[TAB v" + TabConstants.PLUGIN_VERSION + "] ") + EnumChatFormat.decolor(message), false);
                 }
                 for (String line : error) {
-                    write(buf, "&c", line, intoConsoleToo);
+                    if (file.length() < 1000000)
+                        buf.write(dateFormat.format(new Date()) + IChatBaseComponent.fromColoredText("&c").toRawText() + line + System.getProperty("line.separator"));
+                    if (intoConsoleToo || TAB.getInstance().getConfiguration().isDebugMode())
+                        TAB.getInstance().sendConsoleMessage(EnumChatFormat.color("&c") + line, false);
                 }
             }
         } catch (IOException ex) {
@@ -154,23 +160,6 @@ public class ErrorManager {
         printError(message, t, false, placeholderErrorLog);
     }
 
-    /**
-     * Writes message into buffer and console if set
-     *
-     * @param   buf
-     *          writer to write message to
-     * @param   message
-     *          message to write
-     * @param   forceConsole
-     *          whether to send into console even without debug mode
-     * @throws  IOException
-     *          if I/O writer operation fails
-     */
-    private void write(BufferedWriter buf, String prefix, String message, boolean forceConsole) throws IOException {
-        buf.write(dateFormat.format(new Date()) + IChatBaseComponent.fromColoredText(prefix).toRawText() + message + System.getProperty("line.separator"));
-        if (TAB.getInstance().getConfiguration().isDebugMode() || forceConsole) TAB.getInstance().sendConsoleMessage(EnumChatFormat.color(prefix) + message, false);
-    }
-
     /**
      * Prints error message and stack trace into errors.log file as well as the console
      *

shared/src/main/java/me/neznamy/tab/shared/FeatureManagerImpl.java

@@ -5,6 +5,7 @@ import java.util.Map;
 import java.util.UUID;
 
 import me.neznamy.tab.api.FeatureManager;
+import me.neznamy.tab.api.TabConstants;
 import me.neznamy.tab.api.TabFeature;
 import me.neznamy.tab.api.TabPlayer;
 import me.neznamy.tab.api.placeholder.PlayerPlaceholder;
@@ -28,6 +29,10 @@ public class FeatureManagerImpl implements FeatureManager {
     /** All registered features in an array to avoid memory allocations on iteration */
     private TabFeature[] values = new TabFeature[0];
 
+    private boolean objectiveListeners = false;
+
+    private boolean displayObjectiveListeners = false;
+
     /**
      * Calls load() on all features.
      * This function is called on plugin startup.
@@ -94,12 +99,7 @@ public class FeatureManagerImpl implements FeatureManager {
         return pack;
     }
 
-    /**
-     * Calls onQuit(TabPlayer) on all features
-     * 
-     * @param   disconnectedPlayer
-     *          player who disconnected
-     */
+    @Override
     public void onQuit(TabPlayer disconnectedPlayer) {
         if (disconnectedPlayer == null) return;
         long millis = System.currentTimeMillis();
@@ -113,22 +113,21 @@ public class FeatureManagerImpl implements FeatureManager {
         TAB.getInstance().debug("Player quit of " + disconnectedPlayer.getName() + " processed in " + (System.currentTimeMillis()-millis) + "ms");
     }
 
-    /**
-     * Calls onJoin(TabPlayer) on all features
-     * 
-     * @param   connectedPlayer
-     *          player who connected
-     */
+    @Override
     public void onJoin(TabPlayer connectedPlayer) {
         if (!connectedPlayer.isOnline()) return;
         long millis = System.currentTimeMillis();
         TAB.getInstance().addPlayer(connectedPlayer);
         for (TabFeature f : values) {
-            if (!f.overridesMethod("onJoin")) continue;
-            long time = System.nanoTime();
-            f.onJoin(connectedPlayer);
-            TAB.getInstance().getCPUManager().addTime(f, TabConstants.CpuUsageCategory.PLAYER_JOIN, System.nanoTime()-time);
-            TAB.getInstance().debug("Feature " + f.getClass().getSimpleName() + " processed player join in " + (System.nanoTime()-time)/1000000 + "ms");
+            try {
+                if (!f.overridesMethod("onJoin")) continue;
+                long time = System.nanoTime();
+                f.onJoin(connectedPlayer);
+                TAB.getInstance().getCPUManager().addTime(f, TabConstants.CpuUsageCategory.PLAYER_JOIN, System.nanoTime()-time);
+                TAB.getInstance().debug("Feature " + f.getClass().getSimpleName() + " processed player join in " + (System.nanoTime()-time)/1000000 + "ms");
+            } catch (Throwable e) {
+                TAB.getInstance().getErrorManager().criticalError("Feature " + f.getClass().getSimpleName() + " failed to process player " + connectedPlayer.getName(), e);
+            }
         }
         ((ITabPlayer)connectedPlayer).markAsLoaded(true);
         TAB.getInstance().debug("Player join of " + connectedPlayer.getName() + " processed in " + (System.currentTimeMillis()-millis) + "ms");
@@ -138,14 +137,7 @@ public class FeatureManagerImpl implements FeatureManager {
         }
     }
 
-    /**
-     * Calls onWorldChange(TabPlayer, String, String) on all features
-     * 
-     * @param   playerUUID
-     *          player who switched world
-     * @param   to
-     *          name of the new world
-     */
+    @Override
     public void onWorldChange(UUID playerUUID, String to) {
         TabPlayer changed = TAB.getInstance().getPlayer(playerUUID);
         if (changed == null) return;
@@ -157,17 +149,10 @@ public class FeatureManagerImpl implements FeatureManager {
             f.onWorldChange(changed, from, to);
             TAB.getInstance().getCPUManager().addTime(f, TabConstants.CpuUsageCategory.WORLD_SWITCH, System.nanoTime()-time);
         }
-        ((PlayerPlaceholder)TAB.getInstance().getPlaceholderManager().getPlaceholder("%world%")).updateValue(changed, to);
+        ((PlayerPlaceholder)TAB.getInstance().getPlaceholderManager().getPlaceholder(TabConstants.Placeholder.WORLD)).updateValue(changed, to);
     }
 
-    /**
-     * Calls onServerChange(TabPlayer, String, String) on all features
-     * 
-     * @param   playerUUID
-     *          player who switched server
-     * @param   to
-     *          name of the new server
-     */
+    @Override
     public void onServerChange(UUID playerUUID, String to) {
         TabPlayer changed = TAB.getInstance().getPlayer(playerUUID);
         if (changed == null) return;
@@ -181,18 +166,10 @@ public class FeatureManagerImpl implements FeatureManager {
             f.onServerChange(changed, from, to);
             TAB.getInstance().getCPUManager().addTime(f, TabConstants.CpuUsageCategory.SERVER_SWITCH, System.nanoTime()-time);
         }
-        ((PlayerPlaceholder)TAB.getInstance().getPlaceholderManager().getPlaceholder("%server%")).updateValue(changed, to);
+        ((PlayerPlaceholder)TAB.getInstance().getPlaceholderManager().getPlaceholder(TabConstants.Placeholder.SERVER)).updateValue(changed, to);
     }
 
-    /**
-     * Calls onCommand(TabPlayer, String) on all features
-     * 
-     * @param   sender
-     *          command sender
-     * @param   command
-     *          command line including /
-     * @return  {@code true} if command should be cancelled, {@code false} if not
-     */
+    @Override
     public boolean onCommand(TabPlayer sender, String command) {
         if (sender == null) return false;
         boolean cancel = false;
@@ -205,6 +182,16 @@ public class FeatureManagerImpl implements FeatureManager {
         return cancel;
     }
 
+    @Override
+    public void markObjective() {
+        objectiveListeners = true;
+    }
+
+    @Override
+    public void markDisplayObjective() {
+        displayObjectiveListeners = true;
+    }
+
     /**
      * Calls onPacketReceive(TabPlayer, Object) on all features
      * 
@@ -277,6 +264,7 @@ public class FeatureManagerImpl implements FeatureManager {
      *          if reflective operation fails
      */
     public void onDisplayObjective(TabPlayer packetReceiver, Object packet) throws ReflectiveOperationException {
+        if (!displayObjectiveListeners) return;
         long time = System.nanoTime();
         PacketPlayOutScoreboardDisplayObjective display = TAB.getInstance().getPlatform().getPacketBuilder().readDisplayObjective(packet);
         TAB.getInstance().getCPUManager().addTime(TabConstants.Feature.PACKET_DESERIALIZING, TabConstants.CpuUsageCategory.PACKET_DISPLAY_OBJECTIVE, System.nanoTime()-time);
@@ -297,6 +285,7 @@ public class FeatureManagerImpl implements FeatureManager {
      *          if reflective operation fails
      */
     public void onObjective(TabPlayer packetReceiver, Object packet) throws ReflectiveOperationException {
+        if (!objectiveListeners) return;
         long time = System.nanoTime();
         PacketPlayOutScoreboardObjective display = TAB.getInstance().getPlatform().getPacketBuilder().readObjective(packet);
         TAB.getInstance().getCPUManager().addTime(TabConstants.Feature.PACKET_DESERIALIZING, TabConstants.CpuUsageCategory.PACKET_OBJECTIVE, System.nanoTime()-time);

shared/src/main/java/me/neznamy/tab/shared/GroupManager.java

@@ -1,5 +1,6 @@
 package me.neznamy.tab.shared;
 
+import me.neznamy.tab.api.TabConstants;
 import me.neznamy.tab.api.TabFeature;
 import me.neznamy.tab.api.TabPlayer;
 import me.neznamy.tab.shared.permission.PermissionPlugin;
@@ -58,21 +59,22 @@ public class GroupManager extends TabFeature {
      */
     private String getByPrimary(TabPlayer player) {
         try {
-            return plugin.getPrimaryGroup(player);
+            String group = plugin.getPrimaryGroup(player);
+            return group == null ? TabConstants.NO_GROUP : group;
         } catch (Exception e) {
             TAB.getInstance().getErrorManager().printError("Failed to get permission group of " + player.getName() + " using " + plugin.getName() + " v" + plugin.getVersion(), e);
-            return TabConstants.DEFAULT_GROUP;
+            return TabConstants.NO_GROUP;
         }
     }
 
     /**
      * Returns player's permission group based on highest permission
-     * or {@link TabConstants#DEFAULT_GROUP} if player has no permission.
+     * or {@link TabConstants#NO_GROUP} if player has no permission.
      *
      * @param   player
      *          Player to get permission group of
      * @return  Highest permission group player has permission for
-     *          or {@link TabConstants#DEFAULT_GROUP} if player does not have any
+     *          or {@link TabConstants#NO_GROUP} if player does not have any
      */
     private String getByPermission(TabPlayer player) {
         for (String group : primaryGroupFindingList) {
@@ -80,7 +82,7 @@ public class GroupManager extends TabFeature {
                 return group;
             }
         }
-        return TabConstants.DEFAULT_GROUP;
+        return TabConstants.NO_GROUP;
     }
 
     /**

shared/src/main/java/me/neznamy/tab/shared/ITabPlayer.java

@@ -1,12 +1,10 @@
 package me.neznamy.tab.shared;
 
+import java.nio.charset.StandardCharsets;
 import java.util.*;
 
 import io.netty.channel.Channel;
-import me.neznamy.tab.api.Property;
-import me.neznamy.tab.api.ProtocolVersion;
-import me.neznamy.tab.api.TabFeature;
-import me.neznamy.tab.api.TabPlayer;
+import me.neznamy.tab.api.*;
 import me.neznamy.tab.api.chat.IChatBaseComponent;
 import me.neznamy.tab.api.placeholder.PlayerPlaceholder;
 import me.neznamy.tab.api.protocol.*;
@@ -14,7 +12,6 @@ import me.neznamy.tab.api.protocol.PacketPlayOutChat.ChatMessageType;
 import me.neznamy.tab.api.team.TeamManager;
 import me.neznamy.tab.api.util.Preconditions;
 import me.neznamy.tab.shared.event.impl.PlayerLoadEventImpl;
-import me.neznamy.tab.shared.features.NickCompatibility;
 import org.geysermc.floodgate.api.FloodgateApi;
 
 /**
@@ -32,6 +29,9 @@ public abstract class ITabPlayer implements TabPlayer {
     /** Player's unique ID */
     private final UUID uniqueId;
 
+    /** Player's tablist UUID */
+    private final UUID tabListId;
+
     /**
      * World the player is currently in, {@code "N/A"} if TAB is
      * installed on proxy and bukkit bridge is not installed
@@ -77,6 +77,9 @@ public abstract class ITabPlayer implements TabPlayer {
     /** Scoreboard objectives player has registered */
     private final List<String> registeredObjectives = new ArrayList<>();
 
+    /** Player's name as seen in GameProfile, can be altered by nick plugins */
+    private String nickname;
+
     /**
      * Constructs new instance with given parameters
      *
@@ -92,16 +95,21 @@ public abstract class ITabPlayer implements TabPlayer {
      *          Player's world
      * @param   protocolVersion
      *          Player's game version
+     * @param   useRealId
+     *          Whether tablist uses real uuid or offline
      */
-    protected ITabPlayer(Object player, UUID uniqueId, String name, String server, String world, int protocolVersion) {
+    protected ITabPlayer(Object player, UUID uniqueId, String name, String server, String world, int protocolVersion, boolean useRealId) {
         this.player = player;
         this.uniqueId = uniqueId;
         this.name = name;
+        this.nickname = name;
         this.server = server;
         this.world = world;
         this.version = ProtocolVersion.fromNetworkId(protocolVersion);
         this.bedrockPlayer = TAB.getInstance().isFloodgateInstalled() && FloodgateApi.getInstance() != null && FloodgateApi.getInstance().isFloodgatePlayer(uniqueId);
         this.permissionGroup = TAB.getInstance().getGroupManager().detectPermissionGroup(this);
+        UUID offlineId = UUID.nameUUIDFromBytes(("OfflinePlayer:" + name).getBytes(StandardCharsets.UTF_8));
+        this.tabListId = useRealId ? getUniqueId() : offlineId;
     }
 
     /**
@@ -133,6 +141,11 @@ public abstract class ITabPlayer implements TabPlayer {
         }
     }
 
+    @Override
+    public boolean setProperty(TabFeature feature, String identifier, String rawValue) {
+        return setProperty(feature, identifier, rawValue, null, false);
+    }
+
     /**
      * Sets team name to given value
      *
@@ -175,7 +188,7 @@ public abstract class ITabPlayer implements TabPlayer {
         Preconditions.checkNotNull(permissionGroup, "permissionGroup");
         if (this.permissionGroup.equals(permissionGroup)) return;
         this.permissionGroup = permissionGroup;
-        ((PlayerPlaceholder)TAB.getInstance().getPlaceholderManager().getPlaceholder("%group%")).updateValue(this, permissionGroup);
+        ((PlayerPlaceholder)TAB.getInstance().getPlaceholderManager().getPlaceholder(TabConstants.Placeholder.GROUP)).updateValue(this, permissionGroup);
         forceRefresh();
     }
 
@@ -233,12 +246,12 @@ public abstract class ITabPlayer implements TabPlayer {
         } else {
             component = new IChatBaseComponent(message);
         }
-        sendCustomPacket(new PacketPlayOutChat(component, ChatMessageType.CHAT));
+        sendCustomPacket(new PacketPlayOutChat(component, ChatMessageType.SYSTEM));
     }
 
     @Override
     public void sendMessage(IChatBaseComponent message) {
-        sendCustomPacket(new PacketPlayOutChat(message, ChatMessageType.CHAT));
+        sendCustomPacket(new PacketPlayOutChat(message, ChatMessageType.SYSTEM));
     }
 
     @Override
@@ -253,11 +266,12 @@ public abstract class ITabPlayer implements TabPlayer {
 
     @Override
     public UUID getTablistUUID() {
-        return uniqueId;
+        return tabListId;
     }
 
     @Override
     public void forceRefresh() {
+        if (!onJoinFinished) return;
         TAB.getInstance().getFeatureManager().refresh(this, true);
     }
 
@@ -277,7 +291,7 @@ public abstract class ITabPlayer implements TabPlayer {
     }
 
     @Override
-    public synchronized void sendCustomPacket(TabPacket packet) {
+    public void sendCustomPacket(TabPacket packet) {
         if (packet == null) return;
         //avoiding BungeeCord bug kicking all players
         if (packet instanceof PacketPlayOutScoreboardTeam) {
@@ -335,18 +349,6 @@ public abstract class ITabPlayer implements TabPlayer {
         sendCustomPacket(packet);
         if (feature != null) TAB.getInstance().getCPUManager().packetSent(feature);
     }
-    
-    @Override
-    public void sendPacket(Object nmsPacket, TabFeature feature) {
-        sendPacket(nmsPacket);
-        if (feature != null) TAB.getInstance().getCPUManager().packetSent(feature.getFeatureName());
-    }
-
-    @Override
-    public void sendPacket(Object packet, String feature) {
-        sendPacket(packet);
-        if (feature != null) TAB.getInstance().getCPUManager().packetSent(feature);
-    }
 
     @Override
     public Property getProperty(String name) {
@@ -404,14 +406,13 @@ public abstract class ITabPlayer implements TabPlayer {
     public boolean isBedrockPlayer() {
         return bedrockPlayer;
     }
-    
-    @Override
-    public boolean setProperty(TabFeature feature, String identifier, String rawValue) {
-        return setProperty(feature, identifier, rawValue, null, false);
-    }
 
     @Override
     public String getNickname() {
-        return ((NickCompatibility) TAB.getInstance().getFeatureManager().getFeature(TabConstants.Feature.NICK_COMPATIBILITY)).getNickname(this);
+        return nickname;
+    }
+
+    public void setNickname(String nickname) {
+        this.nickname = nickname;
     }
 }

shared/src/main/java/me/neznamy/tab/shared/Platform.java

@@ -1,8 +1,10 @@
 package me.neznamy.tab.shared;
 
 import me.neznamy.tab.api.TabPlayer;
+import me.neznamy.tab.api.chat.EnumChatFormat;
 import me.neznamy.tab.api.protocol.PacketBuilder;
 import me.neznamy.tab.shared.permission.PermissionPlugin;
+import org.slf4j.Logger;
 
 /**
  * An interface with methods that are called in universal code,
@@ -48,6 +50,15 @@ public abstract class Platform {
         return packetBuilder;
     }
 
+    public void sendConsoleMessage(String message, boolean translateColors) {
+        Object logger = TAB.getInstance().getLogger();
+        if (logger instanceof java.util.logging.Logger) {
+            ((java.util.logging.Logger) logger).info(translateColors ? EnumChatFormat.color(message) : message);
+        } else if (logger instanceof Logger) {
+            ((Logger) logger).info(translateColors ? EnumChatFormat.color(message) : message);
+        }
+    }
+
     /**
      * Detects permission plugin and returns it's representing object
      *
@@ -69,13 +80,6 @@ public abstract class Platform {
      */
     public abstract void registerUnknownPlaceholder(String identifier);
 
-    /**
-     * Returns {@code true} if this platform is a proxy, {@code false} if a game server
-     *
-     * @return  {@code true} if this platform is a proxy, {@code false} if a game server
-     */
-    public abstract boolean isProxy();
-
     /**
      * Performs platform-specific plugin manager call and returns the result.
      * If plugin is not installed, returns {@code null}.

shared/src/main/java/me/neznamy/tab/shared/TAB.java

@@ -1,22 +1,6 @@
 package me.neznamy.tab.shared;
 
-import java.io.File;
-import java.util.Map;
-import java.util.UUID;
-import java.util.concurrent.ConcurrentHashMap;
-
-import me.neznamy.tab.api.chat.EnumChatFormat;
-import me.neznamy.tab.shared.event.EventBusImpl;
-import me.neznamy.tab.shared.event.impl.TabLoadEventImpl;
-import org.slf4j.Logger;
-import org.yaml.snakeyaml.error.YAMLException;
-
-import me.neznamy.tab.api.HeaderFooterManager;
-import me.neznamy.tab.api.PropertyConfiguration;
-import me.neznamy.tab.api.ProtocolVersion;
-import me.neznamy.tab.api.TabAPI;
-import me.neznamy.tab.api.TabPlayer;
-import me.neznamy.tab.api.TablistFormatManager;
+import me.neznamy.tab.api.*;
 import me.neznamy.tab.api.bossbar.BossBarManager;
 import me.neznamy.tab.api.config.ConfigurationFile;
 import me.neznamy.tab.api.scoreboard.ScoreboardManager;
@@ -24,20 +8,20 @@ import me.neznamy.tab.api.team.TeamManager;
 import me.neznamy.tab.shared.command.DisabledCommand;
 import me.neznamy.tab.shared.command.TabCommand;
 import me.neznamy.tab.shared.config.Configs;
+import me.neznamy.tab.shared.event.EventBusImpl;
+import me.neznamy.tab.shared.event.impl.TabLoadEventImpl;
+import me.neznamy.tab.shared.features.*;
 import me.neznamy.tab.shared.features.alignedplayerlist.AlignedPlayerList;
-import me.neznamy.tab.shared.features.BelowName;
-import me.neznamy.tab.shared.features.GhostPlayerFix;
-import me.neznamy.tab.shared.features.HeaderFooter;
-import me.neznamy.tab.shared.features.NickCompatibility;
-import me.neznamy.tab.shared.features.PingSpoof;
-import me.neznamy.tab.shared.features.PlaceholderManagerImpl;
-import me.neznamy.tab.shared.features.PlayerList;
-import me.neznamy.tab.shared.features.SpectatorFix;
-import me.neznamy.tab.shared.features.YellowNumber;
 import me.neznamy.tab.shared.features.layout.LayoutManager;
 import me.neznamy.tab.shared.features.nametags.NameTag;
 import me.neznamy.tab.shared.features.scoreboard.ScoreboardManagerImpl;
 import me.neznamy.tab.shared.features.sorting.Sorting;
+import org.yaml.snakeyaml.error.YAMLException;
+
+import java.io.File;
+import java.util.Map;
+import java.util.UUID;
+import java.util.concurrent.ConcurrentHashMap;
 
 /**
  * Main class of the plugin storing data and implementing API
@@ -112,6 +96,9 @@ public class TAB extends TabAPI {
     /** Plugin's console logger provided by platform */
     private final Object logger;
 
+    /** File with YAML syntax error, which prevented plugin from loading */
+    private String brokenFile;
+
     /**
      * Constructs new instance with given parameters and sets this
      * new instance as {@link me.neznamy.tab.api.TabAPI} instance.
@@ -162,11 +149,10 @@ public class TAB extends TabAPI {
     public String load() {
         try {
             long time = System.currentTimeMillis();
-            this.errorManager = new ErrorManager();
+            errorManager = new ErrorManager();
             cpu = new CpuManager();
             featureManager = new FeatureManagerImpl();
-            configuration = new Configs(this);
-            configuration.loadFiles();
+            configuration = new Configs();
             featureManager.registerFeature(TabConstants.Feature.PLACEHOLDER_MANAGER, new PlaceholderManagerImpl());
             featureManager.registerFeature(TabConstants.Feature.GROUP_MANAGER, new GroupManager(platform.detectPermissionPlugin()));
             platform.loadFeatures();
@@ -182,7 +168,8 @@ public class TAB extends TabAPI {
         } catch (YAMLException e) {
             sendConsoleMessage("&cDid not enable due to a broken configuration file.", true);
             kill();
-            return configuration.getReloadFailedMessage();
+            return (configuration == null ? "&4Failed to reload, file %file% has broken syntax. Check console for more info."
+                    : configuration.getMessages().getReloadFailBrokenFile()).replace("%file%", brokenFile);
         } catch (Exception e) {
             errorManager.criticalError("Failed to enable. Did you just invent a new way to break the plugin by misconfiguring it?", e);
             kill();
@@ -201,7 +188,7 @@ public class TAB extends TabAPI {
             if (configuration.getMysql() != null) configuration.getMysql().closeConnection();
             featureManager.unload();
             sendConsoleMessage("&aDisabled in " + (System.currentTimeMillis()-time) + "ms", true);
-        } catch (Exception e) {
+        } catch (Exception | NoClassDefFoundError e) {
             errorManager.criticalError("Failed to disable", e);
         }
         kill();
@@ -350,15 +337,6 @@ public class TAB extends TabAPI {
         return configuration;
     }
 
-    /**
-     * Returns {@link #disabled}
-     *
-     * @return  {@link #disabled}
-     */
-    public boolean isDisabled() {
-        return disabled;
-    }
-
     /**
      * Returns {@link #command}
      *
@@ -395,6 +373,15 @@ public class TAB extends TabAPI {
         return dataFolder;
     }
 
+    /**
+     * Returns {@link #logger}
+     *
+     * @return  {@link #logger}
+     */
+    public Object getLogger() {
+        return logger;
+    }
+
     @Override
     public EventBusImpl getEventBus() {
         return eventBus;
@@ -441,11 +428,7 @@ public class TAB extends TabAPI {
 
     @Override
     public void sendConsoleMessage(String message, boolean translateColors) {
-        if (logger instanceof java.util.logging.Logger) {
-            ((java.util.logging.Logger) logger).info(translateColors ? EnumChatFormat.color(message) : message);
-        } else if (logger instanceof Logger) {
-            ((Logger) logger).info(translateColors ? EnumChatFormat.color(message) : message);
-        }
+        platform.sendConsoleMessage(message, translateColors);
     }
 
     @Override
@@ -485,7 +468,7 @@ public class TAB extends TabAPI {
 
     @Override
     public void setBrokenFile(String file) {
-        configuration.setBrokenFile(file);
+        this.brokenFile = file;
     }
 
     @Override
@@ -505,6 +488,11 @@ public class TAB extends TabAPI {
 
     @Override
     public void debug(String message) {
-        if (configuration.isDebugMode()) sendConsoleMessage("&9[DEBUG] " + message, true);
+        if (configuration != null && configuration.isDebugMode()) sendConsoleMessage("&9[DEBUG] " + message, true);
+    }
+
+    @Override
+    public boolean isPluginDisabled() {
+        return disabled;
     }
 }

shared/src/main/java/me/neznamy/tab/shared/TabRepeatingTask.java

@@ -1,100 +0,0 @@
-package me.neznamy.tab.shared;
-
-import me.neznamy.tab.api.TabFeature;
-import me.neznamy.tab.api.task.RepeatingTask;
-
-import java.util.concurrent.ExecutorService;
-import java.util.concurrent.Future;
-
-/**
- * Implementation of RepeatingTask interface which submits provided task
- * to TAB's processing thread in configured interval.
- */
-public class TabRepeatingTask implements RepeatingTask {
-
-    /** Executor service to submit the repeating task to */
-    private final ExecutorService exe;
-
-    /** Task to run periodically */
-    private final Runnable runnable;
-
-    /** Feature creating this task, used in cpu command output */
-    private final TabFeature feature;
-
-    /** Sub-feature creating this task, used in cpu command output */
-    private final String type;
-
-    /** Interval in milliseconds how often to submit the task to main thread */
-    private int interval;
-
-    /** Task pointer returned by executor service to allow this task to be cancelled */
-    private Future<?> task;
-
-    /**
-     * Constructs new instance with given parameters and starts the task.
-     *
-     * @param   exe
-     *          Executor service to submit the repeating task to
-     * @param   runnable
-     *          Task to run periodically
-     * @param   feature
-     *          Feature creating this task, used in cpu command output
-     * @param   type
-     *          Sub-feature creating this task, used in cpu command output
-     * @param   interval
-     *          Interval in milliseconds how often to submit the task to main thread
-     */
-    public TabRepeatingTask(ExecutorService exe, Runnable runnable, TabFeature feature, String type, int interval) {
-        if (interval < 0) throw new IllegalArgumentException("Interval cannot be negative");
-        this.exe = exe;
-        this.runnable = runnable;
-        this.feature = feature;
-        this.type = type;
-        this.interval = interval;
-        createTask();
-    }
-
-    /**
-     * Creates the repeating task and submits it to executor service.
-     */
-    private void createTask() {
-        task = exe.submit(() -> {
-            long nextLoop = System.currentTimeMillis();
-            while (true) {
-                try {
-                    nextLoop += interval;
-                    long sleep = nextLoop - System.currentTimeMillis();
-                    if (sleep > interval) sleep = interval; //servers who travel back in time
-                    if (sleep > 0) Thread.sleep(sleep);
-                    if (feature != null) {
-                        TAB.getInstance().getCPUManager().runMeasuredTask(feature, type, runnable);
-                    } else {
-                        TAB.getInstance().getCPUManager().runTask(runnable);
-                    }
-                } catch (InterruptedException pluginDisabled) {
-                    Thread.currentThread().interrupt();
-                    break;
-                }
-            } 
-        });
-    }
-
-    @Override
-    public int getInterval() {
-        return interval;
-    }
-
-    @Override
-    public void setInterval(int interval) {
-        if (interval < 0) throw new IllegalArgumentException("Interval cannot be negative");
-        //restarting task to break sleep in case of interval reduction
-        cancel();
-        this.interval = interval;
-        createTask();
-    }
-
-    @Override
-    public void cancel() {
-        task.cancel(true);
-    }
-}

shared/src/main/java/me/neznamy/tab/shared/command/BossBarCommand.java

@@ -3,7 +3,7 @@ package me.neznamy.tab.shared.command;
 import me.neznamy.tab.api.TabPlayer;
 import me.neznamy.tab.api.bossbar.BossBarManager;
 import me.neznamy.tab.shared.TAB;
-import me.neznamy.tab.shared.TabConstants;
+import me.neznamy.tab.api.TabConstants;
 
 /**
  * Handler for "/tab bossbar" subcommand

shared/src/main/java/me/neznamy/tab/shared/command/CpuCommand.java

@@ -12,7 +12,7 @@ import me.neznamy.tab.api.chat.EnumChatFormat;
 import me.neznamy.tab.api.chat.IChatBaseComponent;
 import me.neznamy.tab.api.placeholder.Placeholder;
 import me.neznamy.tab.shared.TAB;
-import me.neznamy.tab.shared.TabConstants;
+import me.neznamy.tab.api.TabConstants;
 
 /**
  * Handler for "/tab cpu" subcommand
@@ -20,9 +20,7 @@ import me.neznamy.tab.shared.TabConstants;
 public class CpuCommand extends SubCommand {
 
     private final DecimalFormat decimal3 = new DecimalFormat("#.###");
-
-    private static final char LINE_CHAR = (char)9553;
-    private static final String SEPARATOR = "&8&l" + LINE_CHAR + "&8&m                                                    ";
+    private final char LINE_CHAR = (char)9553;
 
     /**
      * Constructs new instance
@@ -33,6 +31,7 @@ public class CpuCommand extends SubCommand {
 
     @Override
     public void execute(TabPlayer sender, String[] args) {
+        String SEPARATOR = "&8&l" + LINE_CHAR + "&8&m                                                    ";
         TAB tab = TAB.getInstance();
         Map<String, Float> placeholders = tab.getCPUManager().getPlaceholderUsage();
         double placeholdersTotal = placeholders.values().stream().mapToDouble(Float::floatValue).sum();
@@ -77,7 +76,7 @@ public class CpuCommand extends SubCommand {
             if (printCounter++ == 5) break;
             String refresh = "";
             Placeholder p = TAB.getInstance().getPlaceholderManager().getPlaceholder(entry.getKey());
-            if (p != null && !p.isTriggerMode()) refresh = " &8(" + p.getRefresh() + ")&7";
+            if (p != null && p.getRefresh() != -1) refresh = " &8(" + p.getRefresh() + ")&7";
             String colorized = entry.getKey().startsWith("%sync:") ? "&c" + decimal3.format(entry.getValue()) : colorize(decimal3.format(entry.getValue()), 1, 0.3f);
             sendMessage(sender, String.format("&8&l%s &7%s - %s%%", LINE_CHAR, entry.getKey() + refresh, colorized));
         }

shared/src/main/java/me/neznamy/tab/shared/command/DebugCommand.java

@@ -9,7 +9,7 @@ import me.neznamy.tab.api.TabPlayer;
 import me.neznamy.tab.api.chat.EnumChatFormat;
 import me.neznamy.tab.shared.DynamicText;
 import me.neznamy.tab.shared.TAB;
-import me.neznamy.tab.shared.TabConstants;
+import me.neznamy.tab.api.TabConstants;
 import me.neznamy.tab.shared.features.PlayerList;
 import me.neznamy.tab.shared.features.nametags.NameTag;
 
@@ -126,7 +126,7 @@ public class DebugCommand extends SubCommand {
      */
     private String getGroup(TabPlayer analyzed) {
         if (TAB.getInstance().getGroupManager().isGroupsByPermissions()) {
-            return "&eHighest permission for group: &a" + analyzed.getGroup();
+            return "&eHighest group permission: &8tab.group.&a" + analyzed.getGroup();
         }
         return "&ePrimary permission group: &a" + analyzed.getGroup();
     }

shared/src/main/java/me/neznamy/tab/shared/command/DisabledCommand.java

@@ -3,6 +3,7 @@ package me.neznamy.tab.shared.command;
 import java.util.ArrayList;
 import java.util.List;
 
+import me.neznamy.tab.api.ProtocolVersion;
 import me.neznamy.tab.shared.TAB;
 
 /**
@@ -32,7 +33,7 @@ public class DisabledCommand {
             }
         } else {
             if (hasAdminPermission) {
-                String command = !TAB.getInstance().getPlatform().isProxy() ? "/tab" : "/btab";
+                String command = TAB.getInstance().getServerVersion() != ProtocolVersion.PROXY ? "/tab" : "/btab";
                 messages.add("&m                                                                                ");
                 messages.add(" &cPlugin is disabled due to an error. Check console for more details.");
                 messages.add(" &8>> &3&l" + command + " reload");

shared/src/main/java/me/neznamy/tab/shared/command/GroupCommand.java

@@ -5,7 +5,7 @@ import java.util.stream.Collectors;
 
 import me.neznamy.tab.api.TabPlayer;
 import me.neznamy.tab.shared.TAB;
-import me.neznamy.tab.shared.TabConstants;
+import me.neznamy.tab.api.TabConstants;
 
 /**
  * Handler for "/tab group" subcommand
@@ -41,11 +41,11 @@ public class GroupCommand extends PropertyCommand {
         String server = null;
         if (args[args.length-2].equals("-w")) {
             world = args[args.length-1];
-            value = value.substring(0, value.length()-world.length()-4);
+            value = value.startsWith("-w") ? "" : value.substring(0, value.length()-world.length()-4);
         }
         if (args[args.length-2].equals("-s")) {
             server = args[args.length-1];
-            value = value.substring(0, value.length()-server.length()-4);
+            value = value.startsWith("-s") ? "" : value.substring(0, value.length()-server.length()-4);
         }
         if ((value.startsWith("\"") && value.endsWith("\"")) || (value.startsWith("'") && value.endsWith("'"))) {
             value = value.substring(1, value.length()-1);
@@ -54,7 +54,7 @@ public class GroupCommand extends PropertyCommand {
             if (hasPermission(sender, TabConstants.Permission.COMMAND_DATA_REMOVE)) {
                 TAB.getInstance().getConfiguration().getGroups().remove(group);
                 for (TabPlayer pl : TAB.getInstance().getOnlinePlayers()) {
-                    if (pl.getGroup().equals(group) || "_DEFAULT_".equals(group)){
+                    if (pl.getGroup().equals(group) || TabConstants.DEFAULT_GROUP.equals(group)){
                         pl.forceRefresh();
                     }
                 }
@@ -123,7 +123,7 @@ public class GroupCommand extends PropertyCommand {
         if (property.length > 0 && String.valueOf(value.length() == 0 ? null : value).equals(String.valueOf(property[0]))) return;
         TAB.getInstance().getConfiguration().getGroups().setProperty(group, type, server, world, value.length() == 0 ? null : value);
         for (TabPlayer pl : TAB.getInstance().getOnlinePlayers()) {
-            if (pl.getGroup().equals(group) || "_DEFAULT_".equals(group)){
+            if (pl.getGroup().equals(group) || TabConstants.DEFAULT_GROUP.equals(group)){
                 pl.forceRefresh();
             }
         }
@@ -133,7 +133,7 @@ public class GroupCommand extends PropertyCommand {
     public List<String> complete(TabPlayer sender, String[] arguments) {
         if (arguments.length == 1) {
             Set<String> groups = new HashSet<>(TAB.getInstance().getConfiguration().getGroups().getAllEntries());
-            groups.add("_DEFAULT_");
+            groups.add(TabConstants.DEFAULT_GROUP);
             return groups.stream().filter(group -> group.toLowerCase().startsWith(arguments[0].toLowerCase())).collect(Collectors.toList());
         }
         return super.complete(sender, arguments);

shared/src/main/java/me/neznamy/tab/shared/command/GroupsCommand.java

@@ -2,7 +2,7 @@ package me.neznamy.tab.shared.command;
 
 import me.neznamy.tab.api.TabPlayer;
 import me.neznamy.tab.shared.TAB;
-import me.neznamy.tab.shared.TabConstants;
+import me.neznamy.tab.api.TabConstants;
 
 /**
  * Handler for "/tab groups" subcommand

shared/src/main/java/me/neznamy/tab/shared/command/MySQLCommand.java

@@ -3,7 +3,7 @@ package me.neznamy.tab.shared.command;
 import me.neznamy.tab.api.PropertyConfiguration;
 import me.neznamy.tab.api.TabPlayer;
 import me.neznamy.tab.shared.TAB;
-import me.neznamy.tab.shared.TabConstants;
+import me.neznamy.tab.api.TabConstants;
 import me.neznamy.tab.shared.config.Configs;
 import me.neznamy.tab.shared.config.MySQL;
 import me.neznamy.tab.shared.config.file.YamlPropertyConfigurationFile;

shared/src/main/java/me/neznamy/tab/shared/command/NameTagCommand.java

@@ -3,7 +3,7 @@ package me.neznamy.tab.shared.command;
 import me.neznamy.tab.api.TabPlayer;
 import me.neznamy.tab.api.team.TeamManager;
 import me.neznamy.tab.shared.TAB;
-import me.neznamy.tab.shared.TabConstants;
+import me.neznamy.tab.api.TabConstants;
 import me.neznamy.tab.shared.features.nametags.unlimited.NameTagX;
 
 import java.util.Arrays;

shared/src/main/java/me/neznamy/tab/shared/command/ParseCommand.java

@@ -11,7 +11,7 @@ import me.neznamy.tab.api.chat.IChatBaseComponent;
 import me.neznamy.tab.api.placeholder.Placeholder;
 import me.neznamy.tab.shared.DynamicText;
 import me.neznamy.tab.shared.TAB;
-import me.neznamy.tab.shared.TabConstants;
+import me.neznamy.tab.api.TabConstants;
 
 /**
  * Handler for "/tab parse <player> <placeholder>" subcommand

shared/src/main/java/me/neznamy/tab/shared/command/PlayerCommand.java

@@ -5,7 +5,7 @@ import java.util.List;
 
 import me.neznamy.tab.api.TabPlayer;
 import me.neznamy.tab.shared.TAB;
-import me.neznamy.tab.shared.TabConstants;
+import me.neznamy.tab.api.TabConstants;
 
 /**
  * Handler for "/tab player" subcommand
@@ -33,11 +33,11 @@ public class PlayerCommand extends PropertyCommand {
         String server = null;
         if (args[args.length-2].equals("-w")) {
             world = args[args.length-1];
-            value = value.substring(0, value.length()-world.length()-4);
+            value = value.startsWith("-w") ? "" : value.substring(0, value.length()-world.length()-4);
         }
         if (args[args.length-2].equals("-s")) {
             server = args[args.length-1];
-            value = value.substring(0, value.length()-server.length()-4);
+            value = value.startsWith("-s") ? "" : value.substring(0, value.length()-server.length()-4);
         }
         if ((value.startsWith("\"") && value.endsWith("\"")) || (value.startsWith("'") && value.endsWith("'"))) {
             value = value.substring(1, value.length()-1);

shared/src/main/java/me/neznamy/tab/shared/command/PlayerUUIDCommand.java

@@ -5,7 +5,7 @@ import java.util.List;
 
 import me.neznamy.tab.api.TabPlayer;
 import me.neznamy.tab.shared.TAB;
-import me.neznamy.tab.shared.TabConstants;
+import me.neznamy.tab.api.TabConstants;
 
 /**
  * Handler for "/tab playeruuid" subcommand
@@ -38,11 +38,11 @@ public class PlayerUUIDCommand extends PropertyCommand {
         String server = null;
         if (args[args.length-2].equals("-w")) {
             world = args[args.length-1];
-            value = value.substring(0, value.length()-world.length()-4);
+            value = value.startsWith("-w") ? "" : value.substring(0, value.length()-world.length()-4);
         }
         if (args[args.length-2].equals("-s")) {
             server = args[args.length-1];
-            value = value.substring(0, value.length()-server.length()-4);
+            value = value.startsWith("-s") ? "" : value.substring(0, value.length()-server.length()-4);
         }
         if ((value.startsWith("\"") && value.endsWith("\"")) || (value.startsWith("'") && value.endsWith("'"))) {
             value = value.substring(1, value.length()-1);

shared/src/main/java/me/neznamy/tab/shared/command/ReloadCommand.java

@@ -2,7 +2,7 @@ package me.neznamy.tab.shared.command;
 
 import me.neznamy.tab.api.TabPlayer;
 import me.neznamy.tab.shared.TAB;
-import me.neznamy.tab.shared.TabConstants;
+import me.neznamy.tab.api.TabConstants;
 
 /**
  * Handler for "/tab reload" subcommand

shared/src/main/java/me/neznamy/tab/shared/command/ScoreboardCommand.java

@@ -8,7 +8,7 @@ import java.util.List;
 import me.neznamy.tab.api.TabPlayer;
 import me.neznamy.tab.api.scoreboard.Scoreboard;
 import me.neznamy.tab.shared.TAB;
-import me.neznamy.tab.shared.TabConstants;
+import me.neznamy.tab.api.TabConstants;
 import me.neznamy.tab.shared.features.scoreboard.ScoreboardManagerImpl;
 
 /**
@@ -40,6 +40,7 @@ public class ScoreboardCommand extends SubCommand {
             return;
         }
         TabPlayer p = getTarget(sender, args);
+        if (p == null) return;
         if (scoreboard.getOtherPluginScoreboards().containsKey(p)) return; //not overriding other plugins
         boolean silent = args.length >= 3 && args[2].equals("-s");
         switch(args[0]) {
@@ -88,6 +89,10 @@ public class ScoreboardCommand extends SubCommand {
                 sendMessage(sender, getMessages().getNoPermission());
                 return;
             }
+            if (sender == null) {
+                sendMessage(sender, getMessages().getCommandOnlyFromGame());
+                return;
+            }
             target = sender;
         } else {
             if (!hasPermission(sender,TabConstants.Permission.COMMAND_SCOREBOARD_SHOW_OTHER)) {
@@ -104,15 +109,20 @@ public class ScoreboardCommand extends SubCommand {
     }
 
     private TabPlayer getTarget(TabPlayer sender, String[] args) {
-        TabPlayer target = sender;
         if (args.length >= 2 && TAB.getInstance().getPlayer(args[1]) != null) {
             if (hasPermission(sender, TabConstants.Permission.COMMAND_SCOREBOARD_TOGGLE_OTHER)) {
-                target = TAB.getInstance().getPlayer(args[1]);
+                return TAB.getInstance().getPlayer(args[1]);
+            } else {
+                sendMessage(sender, getMessages().getNoPermission());
+            }
+        } else {
+            if (hasPermission(sender, TabConstants.Permission.COMMAND_SCOREBOARD_TOGGLE)) {
+                return sender;
             } else {
                 sendMessage(sender, getMessages().getNoPermission());
             }
         }
-        return target;
+        return null;
     }
 
     private ScoreboardManagerImpl getScoreboardManager() {

shared/src/main/java/me/neznamy/tab/shared/command/SetCollisionCommand.java

@@ -7,7 +7,7 @@ import java.util.List;
 import me.neznamy.tab.api.TabPlayer;
 import me.neznamy.tab.api.team.TeamManager;
 import me.neznamy.tab.shared.TAB;
-import me.neznamy.tab.shared.TabConstants;
+import me.neznamy.tab.api.TabConstants;
 
 public class SetCollisionCommand extends SubCommand {
 

shared/src/main/java/me/neznamy/tab/shared/command/SubCommand.java

@@ -10,7 +10,7 @@ import java.util.stream.Collectors;
 
 import me.neznamy.tab.api.TabPlayer;
 import me.neznamy.tab.shared.TAB;
-import me.neznamy.tab.shared.TabConstants;
+import me.neznamy.tab.api.TabConstants;
 import me.neznamy.tab.shared.config.MessageFile;
 /**
  * Abstract class representing a subcommand of "/tab" command

shared/src/main/java/me/neznamy/tab/shared/command/TabCommand.java

@@ -6,11 +6,12 @@ import java.util.List;
 
 import com.google.common.collect.Lists;
 
+import me.neznamy.tab.api.ProtocolVersion;
 import me.neznamy.tab.api.TabPlayer;
 import me.neznamy.tab.api.chat.EnumChatFormat;
 import me.neznamy.tab.api.chat.IChatBaseComponent;
 import me.neznamy.tab.shared.TAB;
-import me.neznamy.tab.shared.TabConstants;
+import me.neznamy.tab.api.TabConstants;
 
 /**
  * The core command handler
@@ -38,6 +39,7 @@ public class TabCommand extends SubCommand {
         registerSubCommand(new SetCollisionCommand());
         registerSubCommand(new ScoreboardCommand());
         registerSubCommand(new WidthCommand());
+        //registerSubCommand(new WidthCheckCommand());
         List<String> properties = Lists.newArrayList(TabConstants.Property.TABPREFIX, TabConstants.Property.TABSUFFIX, TabConstants.Property.TAGPREFIX, TabConstants.Property.TAGSUFFIX, TabConstants.Property.CUSTOMTABNAME, TabConstants.Property.ABOVENAME, TabConstants.Property.BELOWNAME, TabConstants.Property.CUSTOMTAGNAME);
         properties.addAll(((DebugCommand) getSubcommands().get("debug")).getExtraLines());
         SubCommand.setAllProperties(properties.toArray(new String[0]));
@@ -80,7 +82,7 @@ public class TabCommand extends SubCommand {
                 TAB.getInstance().sendConsoleMessage("&3TAB v" + TabConstants.PLUGIN_VERSION, true);
             }
             for (String message : getMessages().getHelpMenu()) {
-                if (TAB.getInstance().getPlatform().isProxy()) message = message.replace("/tab", "/btab");
+                if (TAB.getInstance().getServerVersion() == ProtocolVersion.PROXY) message = message.replace("/tab", "/btab");
                 sendMessage(sender, message);
             }
         }

shared/src/main/java/me/neznamy/tab/shared/command/WidthCheckCommand.java

@@ -0,0 +1,100 @@
+package me.neznamy.tab.shared.command;
+
+import me.neznamy.tab.api.TabConstants;
+import me.neznamy.tab.api.TabPlayer;
+import me.neznamy.tab.api.chat.EnumChatFormat;
+import me.neznamy.tab.api.chat.IChatBaseComponent;
+import me.neznamy.tab.shared.TAB;
+
+import java.io.BufferedReader;
+import java.io.InputStream;
+import java.io.InputStreamReader;
+import java.util.Map;
+import java.util.stream.Collectors;
+
+/**
+ * Handler for "/tab width" subcommand
+ */
+public class WidthCheckCommand extends SubCommand {
+
+    private final byte[] widths = loadWidths();
+
+    /**
+     * Constructs new instance
+     */
+    public WidthCheckCommand() {
+        super("widthcheck", TabConstants.Permission.COMMAND_WIDTH);
+    }
+
+    private byte[] loadWidths() {
+        byte[] widths = new byte[65536];
+        InputStream file = getClass().getClassLoader().getResourceAsStream("widths.txt");
+        if (file == null) {
+            TAB.getInstance().getErrorManager().criticalError("Failed to load widths.txt file. Is it inside the jar? Aligned suffix will not work.", null);
+            return widths;
+        }
+        int characterId = 1;
+        for (String line : new BufferedReader(new InputStreamReader(file)).lines().collect(Collectors.toList())) {
+            widths[characterId++] = (byte) Float.parseFloat(line);
+        }
+        Map<Integer, Integer> widthOverrides = TAB.getInstance().getConfiguration().getConfig().getConfigurationSection("tablist-name-formatting.character-width-overrides");
+        for (Map.Entry<Integer, Integer> entry : widthOverrides.entrySet()) {
+            widths[entry.getKey()] = entry.getValue().byteValue();
+        }
+        return widths;
+    }
+
+    @Override
+    public void execute(TabPlayer sender, String[] args) {
+        if (sender == null) {
+            sendMessage(null, getMessages().getCommandOnlyFromGame());
+            return;
+        }
+        if (args.length == 1) {
+            int i = Integer.parseInt(args[0]);
+            if (i > Character.MAX_VALUE) {
+                sendMessage(sender, "&cCharacter ID out of range: 0-" + (int) Character.MAX_VALUE);
+                return;
+            }
+            int ROWS = 15;
+            int COLUMNS = 10;
+            StringBuilder line = new StringBuilder();
+            for (int row = 0; row < ROWS; row++) {
+                line.append(".");
+                for (int column = 0; column < COLUMNS; column++) {
+                    int character = row*COLUMNS+column + i;
+                    if (character >= Character.MAX_VALUE) continue;
+                    line.append(buildSpaces(21-widths[character]));
+                    line.append((char)character);
+                    line.append("&e|&r");
+                }
+                line.append("   ").append(row * COLUMNS + i).append("-").append((row + 1) * COLUMNS + i - 1).append("\n");
+            }
+            IChatBaseComponent msg = IChatBaseComponent.fromColoredText(line + "§7§l[Previous]");
+            msg.getModifier().onClickRunCommand("/tab widthcheck " + (i-ROWS*COLUMNS));
+            IChatBaseComponent next = new IChatBaseComponent("                                    §7§l[Next]");
+            next.getModifier().onClickRunCommand("/tab widthcheck " + (i+ROWS*COLUMNS));
+            msg.addExtra(next);
+            sender.sendMessage(msg);
+        }
+    }
+
+    private String buildSpaces(int pixelWidth) {
+        if (pixelWidth < 12) throw new IllegalArgumentException("Cannot build space lower than 12 pixels wide (" + pixelWidth + ")");
+        int pixelsLeft = pixelWidth;
+        StringBuilder output = new StringBuilder();
+        while (pixelsLeft % 5 != 0) {
+            pixelsLeft -= 4;
+            output.append(' ');
+        }
+        output.append(EnumChatFormat.COLOR_CHAR);
+        output.append('l');
+        while (pixelsLeft > 0) {
+            pixelsLeft -= 5;
+            output.append(' ');
+        }
+        output.append(EnumChatFormat.COLOR_CHAR);
+        output.append('r');
+        return output.toString();
+    }
+} 

shared/src/main/java/me/neznamy/tab/shared/command/WidthCommand.java

@@ -4,7 +4,7 @@ import me.neznamy.tab.api.TabPlayer;
 import me.neznamy.tab.api.chat.EnumChatFormat;
 import me.neznamy.tab.api.chat.IChatBaseComponent;
 import me.neznamy.tab.shared.TAB;
-import me.neznamy.tab.shared.TabConstants;
+import me.neznamy.tab.api.TabConstants;
 
 import java.util.ArrayList;
 import java.util.Arrays;
@@ -152,7 +152,7 @@ public class WidthCommand extends SubCommand {
 
     public void sendWidth(TabPlayer sender, char character, int amount) {
         List<IChatBaseComponent> messages = new ArrayList<>();
-        IChatBaseComponent charMessage = new IChatBaseComponent(EnumChatFormat.color("&2" + character + " &d|"));
+        IChatBaseComponent charMessage = new IChatBaseComponent(EnumChatFormat.color("|&2" + character + " &d|"));
 
         messages.add(new IChatBaseComponent(EnumChatFormat.color("&b[TAB] Click the line with closest width &7(ID: &f" + (int) character + "&7)")));
 
@@ -188,7 +188,7 @@ public class WidthCommand extends SubCommand {
             pixelsRemaining -= 2;
             text.append('i');
         }
-        IChatBaseComponent component = new IChatBaseComponent(EnumChatFormat.color("&b&k" + text + " &e|&b (" + width + " pixels) &7&l[Click to apply]"));
+        IChatBaseComponent component = new IChatBaseComponent(EnumChatFormat.color("|&b&k" + text + " &e|&b (" + width + " pixels) &7&l[Click to apply]"));
         component.getModifier().onClickRunCommand("/tab width set " + c + " " + width);
         component.getModifier().onHoverShowText(new IChatBaseComponent("Click to set width to " + width + " pixels"));
         return component;

shared/src/main/java/me/neznamy/tab/shared/command/level2/AnnounceBarCommand.java

@@ -8,9 +8,8 @@ import me.neznamy.tab.api.TabPlayer;
 import me.neznamy.tab.api.bossbar.BossBar;
 import me.neznamy.tab.api.bossbar.BossBarManager;
 import me.neznamy.tab.shared.TAB;
-import me.neznamy.tab.shared.TabConstants;
+import me.neznamy.tab.api.TabConstants;
 import me.neznamy.tab.shared.command.SubCommand;
-import me.neznamy.tab.shared.features.bossbar.BossBarLine;
 
 /**
  * Handler for "/tab announce bar" subcommand
@@ -48,7 +47,7 @@ public class AnnounceBarCommand extends SubCommand {
             sendMessage(sender, getMessages().getBossBarNotFound(barName));
             return;
         }
-        if (!((BossBarLine)bar).isAnnouncementOnly()) {
+        if (!bar.isAnnouncementBar()) {
             sendMessage(sender, getMessages().getBossBarNotMarkedAsAnnouncement());
             return;
         }
@@ -66,8 +65,9 @@ public class AnnounceBarCommand extends SubCommand {
         if (b == null) return new ArrayList<>();
         List<String> suggestions = new ArrayList<>();
         if (arguments.length == 1) {
-            for (String bar : b.getRegisteredBossBars().keySet()) {
-                if (bar.toLowerCase().startsWith(arguments[0].toLowerCase())) suggestions.add(bar);
+            for (BossBar bar : b.getRegisteredBossBars().values()) {
+                if (bar.getName().toLowerCase().startsWith(arguments[0].toLowerCase()) &&
+                        bar.isAnnouncementBar()) suggestions.add(bar.getName());
             }
         } else if (arguments.length == 2 && b.getBossBar(arguments[0]) != null){
             for (String time : Arrays.asList("5", "10", "30", "60", "120")) {

shared/src/main/java/me/neznamy/tab/shared/command/level2/AnnounceScoreboardCommand.java

@@ -8,7 +8,7 @@ import me.neznamy.tab.api.TabPlayer;
 import me.neznamy.tab.api.scoreboard.Scoreboard;
 import me.neznamy.tab.api.scoreboard.ScoreboardManager;
 import me.neznamy.tab.shared.TAB;
-import me.neznamy.tab.shared.TabConstants;
+import me.neznamy.tab.api.TabConstants;
 import me.neznamy.tab.shared.command.SubCommand;
 
 /**

shared/src/main/java/me/neznamy/tab/shared/command/level2/SendBarCommand.java

@@ -8,9 +8,8 @@ import me.neznamy.tab.api.TabPlayer;
 import me.neznamy.tab.api.bossbar.BossBar;
 import me.neznamy.tab.api.bossbar.BossBarManager;
 import me.neznamy.tab.shared.TAB;
-import me.neznamy.tab.shared.TabConstants;
+import me.neznamy.tab.api.TabConstants;
 import me.neznamy.tab.shared.command.SubCommand;
-import me.neznamy.tab.shared.features.bossbar.BossBarLine;
 
 /**
  * Handler for "/tab announce bar" subcommand
@@ -53,7 +52,7 @@ public class SendBarCommand extends SubCommand {
             sendMessage(sender, getMessages().getBossBarNotFound(barName));
             return;
         }
-        if (!((BossBarLine)bar).isAnnouncementOnly()) {
+        if (!bar.isAnnouncementBar()) {
             sendMessage(sender, getMessages().getBossBarNotMarkedAsAnnouncement());
             return;
         }

shared/src/main/java/me/neznamy/tab/shared/config/Configs.java

@@ -1,6 +1,7 @@
 package me.neznamy.tab.shared.config;
 
 import me.neznamy.tab.api.PropertyConfiguration;
+import me.neznamy.tab.api.ProtocolVersion;
 import me.neznamy.tab.api.config.ConfigurationFile;
 import me.neznamy.tab.api.config.YamlConfigurationFile;
 import me.neznamy.tab.shared.TAB;
@@ -19,33 +20,27 @@ import java.util.List;
  */
 public class Configs {
 
-    private final TAB tab;
-
-    private final Converter converter = new Converter();
-
     //config.yml file
-    private ConfigurationFile config;
+    private final ConfigurationFile config = new YamlConfigurationFile(getClass().getClassLoader().getResourceAsStream(TAB.getInstance().getPlatform().getConfigName()),
+            new File(TAB.getInstance().getDataFolder(), "config.yml"));
 
-    private boolean bukkitPermissions;
-
-    //hidden config options
-    private boolean unregisterBeforeRegister;
-    private boolean removeGhostPlayers;
-    private boolean pipelineInjection;
+    private final boolean bukkitPermissions = TAB.getInstance().getServerVersion() == ProtocolVersion.PROXY && config.getBoolean("use-bukkit-permissions-manager", false);
+    private final boolean debugMode = config.getBoolean("debug", false);
+    private final boolean removeGhostPlayers = getSecretOption("remove-ghost-players", false);
+    private final boolean pipelineInjection = getSecretOption("pipeline-injection", true) && TAB.getInstance().getServerVersion().getMinorVersion() >= 8;
 
     //animations.yml file
-    private ConfigurationFile animation;
+    private final ConfigurationFile animation = new YamlConfigurationFile(getClass().getClassLoader().getResourceAsStream("animations.yml"),
+            new File(TAB.getInstance().getDataFolder(), "animations.yml"));
 
     //messages.yml file
-    private MessageFile messages;
-
-    //default reload message in case plugin did not load translation file due to an error
-    private String reloadFailed = "&4Failed to reload, file %file% has broken syntax. Check console for more info.";
+    private final MessageFile messages = new MessageFile();
 
     //playerdata.yml, used for bossbar & scoreboard toggle saving
     private ConfigurationFile playerdata;
 
-    private ConfigurationFile layout;
+    private final ConfigurationFile layout = new YamlConfigurationFile(getClass().getClassLoader().getResourceAsStream("layout.yml"),
+            new File(TAB.getInstance().getDataFolder(), "layout.yml"));
 
     private PropertyConfiguration groupFile;
 
@@ -53,58 +48,20 @@ public class Configs {
 
     private MySQL mysql;
 
-    private boolean debugMode;
-
-    private String brokenFile;
-
     /**
-     * Constructs new instance with given parameter
-     *
-     * @param   tab
-     *          tab instance
-     */
-    public Configs(TAB tab) {
-        this.tab = tab;
-    }
-
-    /**
-     * Loads all configuration files and converts files to latest version
+     * Constructs new instance and loads configuration files.
+     * If needed, converts old configuration files as well.
      *
      * @throws  IOException
      *          if File I/O operation fails
      * @throws  YAMLException
      *          if files contain syntax errors
      */
-    public void loadFiles() throws YAMLException, IOException {
-        messages = new MessageFile();
-        ClassLoader loader = Configs.class.getClassLoader();
-        loadConfig();
-        animation = new YamlConfigurationFile(loader.getResourceAsStream("animations.yml"), new File(tab.getDataFolder(), "animations.yml"));
-        converter.convertAnimationFile(animation);
-        layout = new YamlConfigurationFile(loader.getResourceAsStream("layout.yml"), new File(tab.getDataFolder(), "layout.yml"));
-        reloadFailed = messages.getReloadFailBrokenFile();
-    }
-
-    /**
-     * Loads config.yml and some of its values
-     *
-     * @throws  IOException
-     *          if File I/O operation fails
-     * @throws  YAMLException
-     *          if files contain syntax errors
-     */
-    public void loadConfig() throws YAMLException, IOException {
-        config = new YamlConfigurationFile(Configs.class.getClassLoader().getResourceAsStream(tab.getPlatform().getConfigName()), new File(tab.getDataFolder(), "config.yml"));
+    public Configs() throws YAMLException, IOException {
+        Converter converter = new Converter();
         converter.convertToV3(config);
         converter.removeOldOptions(config);
-        debugMode = getConfig().getBoolean("debug", false);
-        if (tab.getPlatform().isProxy()) {
-            bukkitPermissions = getConfig().getBoolean("use-bukkit-permissions-manager", false);
-        } else {
-            unregisterBeforeRegister = getSecretOption("unregister-before-register", true);
-        }
-        removeGhostPlayers = getSecretOption("remove-ghost-players", false);
-        pipelineInjection = getSecretOption("pipeline-injection", true) && tab.getServerVersion().getMinorVersion() >= 8;
+        converter.convertAnimationFile(animation);
         if (config.getBoolean("mysql.enabled", false)) {
             try {
                 mysql = new MySQL(config.getString("mysql.host", "127.0.0.1"), config.getInt("mysql.port", 3306),
@@ -116,8 +73,8 @@ public class Configs {
                 TAB.getInstance().getErrorManager().criticalError("Failed to connect to MySQL", e);
             }
         }
-        groupFile = new YamlPropertyConfigurationFile(Configs.class.getClassLoader().getResourceAsStream("groups.yml"), new File(tab.getDataFolder(), "groups.yml"));
-        userFile = new YamlPropertyConfigurationFile(Configs.class.getClassLoader().getResourceAsStream("users.yml"), new File(tab.getDataFolder(), "users.yml"));
+        groupFile = new YamlPropertyConfigurationFile(getClass().getClassLoader().getResourceAsStream("groups.yml"), new File(TAB.getInstance().getDataFolder(), "groups.yml"));
+        userFile = new YamlPropertyConfigurationFile(getClass().getClassLoader().getResourceAsStream("users.yml"), new File(TAB.getInstance().getDataFolder(), "users.yml"));
     }
 
     /**
@@ -131,14 +88,10 @@ public class Configs {
      */
     @SuppressWarnings("unchecked")
     public <T> T getSecretOption(String path, T defaultValue) {
-        Object value = getConfig().getObject(path);
+        Object value = config.getObject(path);
         return value == null ? defaultValue : (T) value;
     }
 
-    public boolean isUnregisterBeforeRegister() {
-        return unregisterBeforeRegister;
-    }
-
     public MessageFile getMessages() {
         return messages;
     }
@@ -167,20 +120,15 @@ public class Configs {
         return pipelineInjection;
     }
 
-    public String getReloadFailedMessage() {
-        String message = messages == null ? reloadFailed : messages.getReloadFailBrokenFile();
-        return message.replace("%file%", brokenFile);
-    }
-
     public ConfigurationFile getPlayerDataFile() {
         if (playerdata == null) {
-            File file = new File(tab.getDataFolder(), "playerdata.yml");
+            File file = new File(TAB.getInstance().getDataFolder(), "playerdata.yml");
             try {
                 if (file.exists() || file.createNewFile()) {
                     playerdata = new YamlConfigurationFile(null, file);
                 }
             } catch (IOException e) {
-                tab.getErrorManager().criticalError("Failed to load playerdata.yml", e);
+                TAB.getInstance().getErrorManager().criticalError("Failed to load playerdata.yml", e);
             }
         }
         return playerdata;
@@ -215,8 +163,4 @@ public class Configs {
     public boolean isDebugMode() {
         return debugMode;
     }
-
-    public void setBrokenFile(String file) {
-        this.brokenFile = file;
-    }
 }

shared/src/main/java/me/neznamy/tab/shared/config/Converter.java

@@ -1,8 +1,10 @@
 package me.neznamy.tab.shared.config;
 
+import me.neznamy.tab.api.ProtocolVersion;
 import me.neznamy.tab.api.config.ConfigurationFile;
 import me.neznamy.tab.api.config.YamlConfigurationFile;
 import me.neznamy.tab.shared.TAB;
+import me.neznamy.tab.api.TabConstants;
 
 import java.io.File;
 import java.io.IOException;
@@ -112,7 +114,7 @@ public class Converter {
         newConfig.set("scoreboard-teams.anti-override", oldConfig.getBoolean("anti-override.scoreboard-teams", true));
         newConfig.set("scoreboard-teams.enable-collision", oldConfig.getBoolean("enable-collision", true));
         newConfig.set("scoreboard-teams.disable-in-worlds", oldConfig.getStringList("disable-features-in-worlds.nametag", Collections.singletonList("disabledworld")));
-        if (TAB.getInstance().getPlatform().isProxy()) {
+        if (TAB.getInstance().getServerVersion() == ProtocolVersion.PROXY) {
             newConfig.set("scoreboard-teams.disable-in-servers", oldConfig.getStringList("disable-features-in-servers.nametag", Collections.singletonList("disabledserver")));
         } else {
             newConfig.set("scoreboard-teams.unlimited-nametag-mode.enabled", oldConfig.getBoolean("unlimited-nametag-prefix-suffix-mode.enabled", false));
@@ -157,7 +159,7 @@ public class Converter {
                 sortingTypes.add(type + ":" + sortingPlaceholder);
             }
         }
-        sortingTypes.add("PLACEHOLDER_A_TO_Z:%player%");
+        sortingTypes.add("PLACEHOLDER_A_TO_Z:" + TabConstants.Placeholder.PLAYER);
         newConfig.set("scoreboard-teams.sorting-types", sortingTypes);
     }
 
@@ -165,7 +167,7 @@ public class Converter {
         newConfig.set("tablist-name-formatting.enabled", oldConfig.getBoolean("change-tablist-prefix-suffix", true));
         newConfig.set("tablist-name-formatting.anti-override", oldConfig.getBoolean("anti-override.tablist-names", true));
         newConfig.set("tablist-name-formatting.disable-in-worlds", oldConfig.getStringList("disable-features-in-worlds.tablist-names", Collections.singletonList("disabledworld")));
-        if (TAB.getInstance().getPlatform().isProxy())
+        if (TAB.getInstance().getServerVersion() == ProtocolVersion.PROXY)
             newConfig.set("tablist-name-formatting.disable-in-servers", oldConfig.getStringList("disable-features-in-servers.tablist-names", Collections.singletonList("disabledserver")));
         if (premiumConfig != null) {
             newConfig.set("tablist-name-formatting.align-tabsuffix-on-the-right", premiumConfig.getBoolean("align-tabsuffix-on-the-right", false));
@@ -177,17 +179,17 @@ public class Converter {
     }
 
     private void convertYellowNumber(ConfigurationFile oldConfig, ConfigurationFile newConfig) {
-        newConfig.set("yellow-number-in-tablist.enabled", !oldConfig.getString("yellow-number-in-tablist","%ping%").equals(""));
-        newConfig.set("yellow-number-in-tablist.value", oldConfig.getString("yellow-number-in-tablist","%ping%"));
+        newConfig.set("yellow-number-in-tablist.enabled", !oldConfig.getString("yellow-number-in-tablist", TabConstants.Placeholder.PING).equals(""));
+        newConfig.set("yellow-number-in-tablist.value", oldConfig.getString("yellow-number-in-tablist", TabConstants.Placeholder.PING));
         newConfig.set("yellow-number-in-tablist.disable-in-worlds", oldConfig.getStringList("disable-features-in-worlds.yellow-number", Collections.singletonList("disabledworld")));
-        if (TAB.getInstance().getPlatform().isProxy())
+        if (TAB.getInstance().getServerVersion() == ProtocolVersion.PROXY)
             newConfig.set("yellow-number-in-tablist.disable-in-servers", oldConfig.getStringList("disable-features-in-servers.yellow-number", Collections.singletonList("disabledserver")));
     }
 
     private void convertBelowName(ConfigurationFile oldConfig, ConfigurationFile newConfig) {
         newConfig.set("belowname-objective", oldConfig.getConfigurationSection("classic-vanilla-belowname"));
         newConfig.set("belowname-objective.disable-in-worlds", oldConfig.getStringList("disable-features-in-worlds.belowname", Collections.singletonList("disabledworld")));
-        if (TAB.getInstance().getPlatform().isProxy())
+        if (TAB.getInstance().getServerVersion() == ProtocolVersion.PROXY)
             newConfig.set("belowname-objective.disable-in-servers", oldConfig.getStringList("disable-features-in-servers.belowname", Collections.singletonList("disabledserver")));
     }
 
@@ -197,12 +199,12 @@ public class Converter {
         newConfig.set("bossbar.remember-toggle-choice", bossBar.getBoolean("remember-toggle-choice", false));
         newConfig.set("bossbar.hidden-by-default", bossBar.getBoolean("hidden-by-default", false));
         newConfig.set("bossbar.disable-in-worlds", bossBar.getObject("disable-features-in-worlds.bossbar"));
-        if (TAB.getInstance().getPlatform().isProxy())
+        if (TAB.getInstance().getServerVersion() == ProtocolVersion.PROXY)
             newConfig.set("bossbar.disable-in-servers", oldConfig.getStringList("disable-features-in-servers.bossbar", Collections.singletonList("disabledserver")));
         Map<Object, Map<String, Object>> bars = bossBar.getConfigurationSection("bars");
         Map<String, List<Object>> perWorldBossBars = bossBar.getConfigurationSection("per-world");
         List<Object> activeBossBars = new ArrayList<>(bossBar.getStringList("default-bars", new ArrayList<>()));
-        String separator = TAB.getInstance().getPlatform().isProxy() ? "server" : "world";
+        String separator = TAB.getInstance().getServerVersion() == ProtocolVersion.PROXY ? "server" : "world";
         if (perWorldBossBars != null) {
             for (Map.Entry<String, List<Object>> entry : perWorldBossBars.entrySet()) {
                 for (Object bar : entry.getValue()) {
@@ -224,7 +226,7 @@ public class Converter {
     }
 
     private void convertScoreboard(ConfigurationFile newConfig, ConfigurationFile premiumConfig) {
-        String separator = TAB.getInstance().getPlatform().isProxy() ? "server" : "world";
+        String separator = TAB.getInstance().getServerVersion() == ProtocolVersion.PROXY ? "server" : "world";
         newConfig.set("scoreboard", premiumConfig.getObject("scoreboard"));
         newConfig.set("scoreboard.permission-required-to-toggle", null);
         Map<String, Map<String,Object>> scoreboards = premiumConfig.getConfigurationSection("scoreboards");
@@ -261,7 +263,7 @@ public class Converter {
         newConfig.set("scoreboard.delay-on-join-milliseconds", 0);
         newConfig.set("scoreboard.respect-other-plugins", true);
         newConfig.set("scoreboard.disable-in-worlds", Collections.singletonList("disabledworld"));
-        if (TAB.getInstance().getPlatform().isProxy()) {
+        if (TAB.getInstance().getServerVersion() == ProtocolVersion.PROXY) {
             newConfig.set("scoreboard.disable-in-servers", Collections.singletonList("disabledserver"));
         }
         newConfig.set("scoreboard.scoreboards.admin.display-condition", "permission:tab.scoreboard.admin");
@@ -280,10 +282,10 @@ public class Converter {
         newConfig.set("header-footer.header", oldConfig.getStringList("header"));
         newConfig.set("header-footer.footer", oldConfig.getStringList("footer"));
         newConfig.set("header-footer.disable-in-worlds", oldConfig.getStringList("disable-features-in-worlds.header-footer", Collections.singletonList("disabledworld")));
-        if (TAB.getInstance().getPlatform().isProxy())
+        if (TAB.getInstance().getServerVersion() == ProtocolVersion.PROXY)
             newConfig.set("header-footer.disable-in-servers", oldConfig.getStringList("disable-features-in-servers.header-footer", Collections.singletonList("disabledserver")));
 
-        String separator = TAB.getInstance().getPlatform().isProxy() ? "server" : "world";
+        String separator = TAB.getInstance().getServerVersion() == ProtocolVersion.PROXY ? "server" : "world";
         Map<String, Map<String, Object>> perWorldSettings = oldConfig.getConfigurationSection("per-" + separator + "-settings");
         Map<String, Object> headerFooterMap = new LinkedHashMap<>();
         for (Map.Entry<String, Map<String, Object>> worldEntry : new LinkedHashMap<>(perWorldSettings).entrySet()) {
@@ -312,7 +314,7 @@ public class Converter {
             newConfig.set("conditions.nick.yes", "%player%");
             newConfig.set("conditions.nick.no", "~%essentials_nickname%");
         }
-        if (!TAB.getInstance().getPlatform().isProxy()) {
+        if (TAB.getInstance().getServerVersion() != ProtocolVersion.PROXY) {
             newConfig.set("placeholder-output-replacements.%afk%.true", placeholders.remove("afk-yes"));
             newConfig.set("placeholder-output-replacements.%afk%.false", placeholders.remove("afk-no"));
         }
@@ -331,7 +333,7 @@ public class Converter {
         newConfig.set("mysql.username", "user");
         newConfig.set("mysql.password", "password");
 
-        if (TAB.getInstance().getPlatform().isProxy()) {
+        if (TAB.getInstance().getServerVersion() == ProtocolVersion.PROXY) {
             newConfig.set("global-playerlist", oldConfig.getConfigurationSection("global-playerlist"));
             newConfig.set("global-playerlist.update-latency", false);
             newConfig.set("use-bukkit-permissions-manager", false);
@@ -345,7 +347,7 @@ public class Converter {
         groups.setValues(oldConfig.getConfigurationSection("Groups"));
         users.setValues(oldConfig.getConfigurationSection("Users"));
 
-        String separator = TAB.getInstance().getPlatform().isProxy() ? "server" : "world";
+        String separator = TAB.getInstance().getServerVersion() == ProtocolVersion.PROXY ? "server" : "world";
         Map<String,Map<String,Object>> perWorldSettings = oldConfig.getConfigurationSection("per-" + separator + "-settings");
         Map<String,Object> groupMap = new LinkedHashMap<>();
         Map<String,Object> userMap = new LinkedHashMap<>();
@@ -359,13 +361,13 @@ public class Converter {
             }
         }
         groups.set("per-" + separator, groupMap);
-        groups.set("_DEFAULT_", groups.getConfigurationSection("_OTHER_"));
+        groups.set(TabConstants.DEFAULT_GROUP, groups.getConfigurationSection("_OTHER_"));
         groups.set("_OTHER_", null);
         users.set("per-" + separator, userMap);
         for (Object world : groups.getConfigurationSection("per-" + separator).keySet()) {
             String gPath = "per-" + separator + "." + world;
             if (!groups.hasConfigOption(gPath + "._OTHER_")) continue;
-            groups.set(gPath + "._DEFAULT_", groups.getObject(gPath + "._OTHER_"));
+            groups.set(gPath + "." + TabConstants.DEFAULT_GROUP, groups.getObject(gPath + "._OTHER_"));
             groups.set(gPath + "._OTHER_", null);
         }
     }

shared/src/main/java/me/neznamy/tab/shared/config/file/YamlPropertyConfigurationFile.java

@@ -5,6 +5,7 @@ import java.io.IOException;
 import java.io.InputStream;
 import java.util.*;
 
+import me.neznamy.tab.api.TabConstants;
 import org.yaml.snakeyaml.error.YAMLException;
 
 import me.neznamy.tab.api.PropertyConfiguration;
@@ -13,9 +14,8 @@ import me.neznamy.tab.shared.TAB;
 
 public class YamlPropertyConfigurationFile extends YamlConfigurationFile implements PropertyConfiguration {
 
-    private static final String PER_SERVER = "per-server";
-    private static final String PER_WORLD = "per-world";
-    private static final String DEFAULT_GROUP = "_DEFAULT_";
+    private final String PER_SERVER = "per-server";
+    private final String PER_WORLD = "per-world";
     
     private final String category;
     private final List<Object> worldGroups = new ArrayList<>(getConfigurationSection(PER_WORLD).keySet());
@@ -43,20 +43,20 @@ public class YamlPropertyConfigurationFile extends YamlConfigurationFile impleme
         if ((value = getObject(new String[] {PER_WORLD, TAB.getInstance().getConfiguration().getGroup(worldGroups, world), name, property})) != null) {
             return new String[] {toString(value), category + "=" + name + ", world=" + world};
         }
-        if ((value = getObject(new String[] {PER_WORLD, TAB.getInstance().getConfiguration().getGroup(worldGroups, world), DEFAULT_GROUP, property})) != null) {
-            return new String[] {toString(value), category + "=" + DEFAULT_GROUP + ", world=" + world};
+        if ((value = getObject(new String[] {PER_WORLD, TAB.getInstance().getConfiguration().getGroup(worldGroups, world), TabConstants.DEFAULT_GROUP, property})) != null) {
+            return new String[] {toString(value), category + "=" + TabConstants.DEFAULT_GROUP + ", world=" + world};
         }
         if ((value = getObject(new String[] {PER_SERVER, TAB.getInstance().getConfiguration().getGroup(serverGroups, server), name, property})) != null) {
             return new String[] {toString(value), category + "=" + name + ", server=" + server};
         }
-        if ((value = getObject(new String[] {PER_SERVER, TAB.getInstance().getConfiguration().getGroup(serverGroups, server), DEFAULT_GROUP, property})) != null) {
-            return new String[] {toString(value), category + "=" + DEFAULT_GROUP + ", server=" + server};
+        if ((value = getObject(new String[] {PER_SERVER, TAB.getInstance().getConfiguration().getGroup(serverGroups, server), TabConstants.DEFAULT_GROUP, property})) != null) {
+            return new String[] {toString(value), category + "=" + TabConstants.DEFAULT_GROUP + ", server=" + server};
         }
         if ((value = getObject(new String[] {name, property})) != null) {
             return new String[] {toString(value), category + "=" + name};
         }
-        if ((value = getObject(new String[] {DEFAULT_GROUP, property})) != null) {
-            return new String[] {toString(value), category + "=" + DEFAULT_GROUP};
+        if ((value = getObject(new String[] {TabConstants.DEFAULT_GROUP, property})) != null) {
+            return new String[] {toString(value), category + "=" + TabConstants.DEFAULT_GROUP};
         }
         return new String[0];
     }

shared/src/main/java/me/neznamy/tab/shared/config/mysql/MySQLGroupConfiguration.java

@@ -2,6 +2,7 @@ package me.neznamy.tab.shared.config.mysql;
 
 import me.neznamy.tab.api.PropertyConfiguration;
 import me.neznamy.tab.shared.TAB;
+import me.neznamy.tab.api.TabConstants;
 import me.neznamy.tab.shared.config.MySQL;
 
 import javax.sql.rowset.CachedRowSet;
@@ -10,7 +11,6 @@ import java.util.*;
 
 public class MySQLGroupConfiguration implements PropertyConfiguration {
 
-    private static final String DEFAULT_GROUP = "_DEFAULT_";
     private final MySQL mysql;
 
     private final Map<String, Map<String, Object>> values = new HashMap<>();
@@ -23,19 +23,18 @@ public class MySQLGroupConfiguration implements PropertyConfiguration {
         CachedRowSet crs = mysql.getCRS("select * from tab_groups");
         while (crs.next()) {
             String group = crs.getString("group");
-            if (!group.equals(DEFAULT_GROUP)) group = group.toLowerCase(Locale.US);
+            if (!group.equals(TabConstants.DEFAULT_GROUP)) group = group.toLowerCase(Locale.US);
             String property = crs.getString("property");
             String value = crs.getString("value");
             String world = crs.getString("world");
             String server = crs.getString("server");
-            TAB.getInstance().debug("Loaded group: " + String.format("%s, %s, %s, %s, %s", group, property, value, world, server));
             setProperty0(group, property, server, world, value);
         }
     }
 
     @Override
     public void setProperty(String group, String property, String server, String world, String value) {
-        String lowercaseGroup = group.equals(DEFAULT_GROUP) ? group : group.toLowerCase(Locale.US);
+        String lowercaseGroup = group.equals(TabConstants.DEFAULT_GROUP) ? group : group.toLowerCase(Locale.US);
         try {
             if (getProperty(lowercaseGroup, property, server, world) != null) {
                 mysql.execute("delete from `tab_groups` where `group` = ? and `property` = ? and world " + querySymbol(world == null) + " ? and server " + querySymbol(server == null) + " ?", lowercaseGroup, property, world, server);
@@ -63,25 +62,25 @@ public class MySQLGroupConfiguration implements PropertyConfiguration {
 
     @Override
     public String[] getProperty(String group, String property, String server, String world) {
-        String lowercaseGroup = group.equals(DEFAULT_GROUP) ? group : group.toLowerCase(Locale.US);
+        String lowercaseGroup = group.equals(TabConstants.DEFAULT_GROUP) ? group : group.toLowerCase(Locale.US);
         Object value;
         if ((value = perWorld.getOrDefault(world, new HashMap<>()).getOrDefault(lowercaseGroup, new HashMap<>()).get(property)) != null) {
             return new String[] {toString(value), String.format("group=%s,world=%s", lowercaseGroup, world)};
         }
-        if ((value = perWorld.getOrDefault(world, new HashMap<>()).getOrDefault(DEFAULT_GROUP, new HashMap<>()).get(property)) != null) {
-            return new String[] {toString(value), String.format("group=%s,world=%s", DEFAULT_GROUP, world)};
+        if ((value = perWorld.getOrDefault(world, new HashMap<>()).getOrDefault(TabConstants.DEFAULT_GROUP, new HashMap<>()).get(property)) != null) {
+            return new String[] {toString(value), String.format("group=%s,world=%s", TabConstants.DEFAULT_GROUP, world)};
         }
         if ((value = perServer.getOrDefault(server, new HashMap<>()).getOrDefault(lowercaseGroup, new HashMap<>()).get(property)) != null) {
             return new String[] {toString(value), String.format("group=%s,server=%s", lowercaseGroup, server)};
         }
-        if ((value = perServer.getOrDefault(server, new HashMap<>()).getOrDefault(DEFAULT_GROUP, new HashMap<>()).get(property)) != null) {
-            return new String[] {toString(value), String.format("group=%s,server=%s", DEFAULT_GROUP, server)};
+        if ((value = perServer.getOrDefault(server, new HashMap<>()).getOrDefault(TabConstants.DEFAULT_GROUP, new HashMap<>()).get(property)) != null) {
+            return new String[] {toString(value), String.format("group=%s,server=%s", TabConstants.DEFAULT_GROUP, server)};
         }
         if ((value = values.getOrDefault(lowercaseGroup, new HashMap<>()).get(property)) != null) {
             return new String[] {toString(value), String.format("group=%s", lowercaseGroup)};
         }
-        if ((value = values.getOrDefault(DEFAULT_GROUP, new HashMap<>()).get(property)) != null) {
-            return new String[] {toString(value), String.format("group=%s", DEFAULT_GROUP)};
+        if ((value = values.getOrDefault(TabConstants.DEFAULT_GROUP, new HashMap<>()).get(property)) != null) {
+            return new String[] {toString(value), String.format("group=%s", TabConstants.DEFAULT_GROUP)};
         }
         return new String[0];
     }

shared/src/main/java/me/neznamy/tab/shared/features/BelowName.java

@@ -11,7 +11,7 @@ import me.neznamy.tab.api.protocol.PacketPlayOutScoreboardObjective.EnumScoreboa
 import me.neznamy.tab.api.protocol.PacketPlayOutScoreboardScore;
 import me.neznamy.tab.api.protocol.PacketPlayOutScoreboardScore.Action;
 import me.neznamy.tab.shared.TAB;
-import me.neznamy.tab.shared.TabConstants;
+import me.neznamy.tab.api.TabConstants;
 import me.neznamy.tab.shared.features.redis.RedisSupport;
 
 /**
@@ -22,13 +22,12 @@ public class BelowName extends TabFeature {
     public static final String OBJECTIVE_NAME = "TAB-BelowName";
     public static final int DISPLAY_SLOT = 2;
 
-    private final String rawNumber = TAB.getInstance().getConfiguration().getConfig().getString("belowname-objective.number", "%health%");
+    private final String rawNumber = TAB.getInstance().getConfiguration().getConfig().getString("belowname-objective.number", TabConstants.Placeholder.HEALTH);
     private final String rawText = TAB.getInstance().getConfiguration().getConfig().getString("belowname-objective.text", "Health");
     private final TabFeature textRefresher = new TextRefresher();
 
     public BelowName() {
-        super("BelowName", "Updating BelowName number", TAB.getInstance().getConfiguration().getConfig().getStringList("belowname-objective.disable-in-servers"),
-                TAB.getInstance().getConfiguration().getConfig().getStringList("belowname-objective.disable-in-worlds"));
+        super("BelowName", "Updating BelowName number", "belowname-objective");
         TAB.getInstance().getFeatureManager().registerFeature(TabConstants.Feature.BELOW_NAME_TEXT, textRefresher);
         TAB.getInstance().debug(String.format("Loaded BelowName feature with parameters number=%s, text=%s, disabledWorlds=%s, disabledServers=%s", rawNumber, rawText, Arrays.toString(disabledWorlds), Arrays.toString(disabledServers)));
     }
@@ -107,6 +106,7 @@ public class BelowName extends TabFeature {
             onJoin(p);
             return;
         }
+        if (disabledNow) return;
         int number = getValue(p);
         for (TabPlayer all : TAB.getInstance().getOnlinePlayers()){
             if (sameServerAndWorld(all, p)) {