1.11 and bump version

This disables the sponge plugin annotation processor and uses our own mcmod.info

.gitignore

@@ -1,3 +1,113 @@
-target/
-.idea/
+### Java files ###
+*.class
+
+# Package Files
+#*.jar
+*.war
+*.ear
+
+# virtual machine crash logs, see http://www.java.com/en/download/help/error_hotspot.xml
+hs_err_pid*
+
+
+
+### Intellij ###
+# Covers JetBrains IDEs: IntelliJ, RubyMine, PhpStorm, AppCode, PyCharm
+# Ignore project files
 *.iml
+
+# Ignore IDEA directory
+.idea/*
+
+# Include the project's dictionary
+!.idea/dictionaries/
+!.idea/dictionaries/*
+
+# File-based project format:
+*.ipr
+*.iws
+
+### Plugin-specific files: ###
+# IntelliJ
+/out/
+
+# mpeltonen/sbt-idea plugin
+.idea_modules/
+
+# JIRA plugin
+atlassian-ide-plugin.xml
+
+# Crashlytics plugin (for Android Studio and IntelliJ)
+com_crashlytics_export_strings.xml
+crashlytics.properties
+crashlytics-build.properties
+
+
+
+### Eclipse ###
+*.pydevproject
+.metadata
+.gradle
+bin/
+tmp/
+*.tmp
+*.bak
+*.swp
+*~.nib
+local.properties
+.settings/
+.loadpath
+
+# Eclipse Core
+.project
+
+# External tool builders
+.externalToolBuilders/
+
+# Locally stored "Eclipse launch configurations"
+*.launch
+
+# CDT-specific
+.cproject
+
+# JDT-specific (Eclipse Java Development Tools)
+.classpath
+
+# PDT-specific
+.buildpath
+
+# sbteclipse plugin
+.target
+
+# TeXlipse plugin
+.texlipse
+
+
+
+### Maven ###
+target/
+pom.xml.tag
+pom.xml.releaseBackup
+pom.xml.versionsBackup
+pom.xml.next
+release.properties
+dependency-reduced-pom.xml
+buildNumber.properties
+
+
+
+### NetBeans ###
+nbproject/private/
+build/
+nbbuild/
+dist/
+nbdist/
+nbactions.xml
+nb-configuration.xml
+.nb-gradle/
+
+
+
+### Git ###
+# Don't exclude the .gitignore itself
+!.gitignore

.travis.yml

@@ -0,0 +1,12 @@
+sudo: false
+
+language: java
+jdk: oraclejdk8
+
+cache:
+  directories:
+    - '$HOME/.m2/repository'
+
+script:
+  - mvn dependency:purge-local-repository -DactTransitively=false -DreResolve=false
+  - mvn clean install -B -U

ISSUE_TEMPLATE.md

@@ -1,10 +1,11 @@
-### What version of ViaVersion are you using? Type /ver viaversion
+### What is the output link of /viaversion dump? 
 
-### What version of Spigot are you using? Type /ver
 
-### What plugins are you using? /plugins
+### Are you using any additional software like BungeeCord? If so, what software and version? (Please list your plugins as well)
+
+
+### How does this error happen? login? Using an item? 
 
-### How does this error happen? login? using an item? 
 
 ### Is there an error in the console? Use pastebin.com. Is there a kick message?
 

LICENSE

@@ -0,0 +1,24 @@
+License:
+--------
+
+MIT License
+
+Copyright (c) 2016
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.

README.md

@@ -1,52 +1,54 @@
-# ViaVersion 0.5.0
-**Allows the connection of 1.9 clients to 1.8**
+# ViaVersion 1.0.0 - Spigot, Sponge, BungeeCord
+[![Build Status](https://travis-ci.org/MylesIsCool/ViaVersion.svg?branch=master)](https://travis-ci.org/MylesIsCool/ViaVersion)
+[![Gitter](https://badges.gitter.im/MylesIsCool/ViaVersion.svg)](https://gitter.im/MylesIsCool/ViaVersion)
 
-This plugin modifies netty to allow connection of 1.9 clients to 1.8,
+IRC: [#viaversion](http://irc.spi.gt/iris/?channels=viaversion) on irc.spi.gt for Support.
 
-###**Don't use late bind*
+**Allows the connection of higher client versions to lower server versions**
 
+Supported Versions:
+
+[![Table] (http://i.imgur.com/SVVhFQ4.png)](http://i.imgur.com/SVVhFQ4.png)
+
+On Bukkit you may also use ProtocolSupport, but ensure you have the right build for your server version.
+
+**User Docs:** https://docs.viaversion.com/display/VIAVERSION/
+
+**Contributor Chat:** https://gitter.im/MylesIsCool/ViaVersion
 
-This took hours of work, so if you enjoy this consider looking into contacting me and supporting my projects.
 
 
 Sources:
 --------
+**wiki.vg** (Used for various information, we also contribute back)
 
-**wiki.vg** (Protocol info, though I did have to find a lot myself)
-
-**MCProtocolLib** (used for chunk reading & some of writing.)
+**Burger** (See [PAaaS](https://github.com/Matsv/Paaas))
 
 **OpenNBT** (used for slot rewriting)
 
 
 
-Contributors:
+Releases / Dev Builds:
 --------
+You can find official releases here:
 
-**Myself** (harhar)
+https://www.spigotmc.org/resources/viaversion.19254/history
 
-**Matsv/StamBoom**
 
-**HugoDaBosss**
+----------
 
-**SanderGielisse**
+You can find official dev builds here:
 
-**Paulomart**
+**Jenkins:** https://ci.viaversion.com
 
-**gigosaurus**
+**JavaDocs:** https://jd.viaversion.com
 
-**fillefilip8**
-
-**Chat: ** https://gitter.im/MylesIsCool/ViaVersion
-
-We use it to collaborate and solve errors, sign in with github.
+**Maven Repo:** https://repo.viaversion.com
 
 License:
 --------
 
-You may modify this work, all rights are still owned by myself excluding any files in the spacebase package as they belong to the respected contributors. Please credit the original author (myself) when forking etc. (or if it helped you understand the new protocol or netty!)
-
-
-Thanks!
+MIT License, see LICENSE for more details.
 
 
+Special thanks to all our [Contributors](https://github.com/MylesIsCool/ViaVersion/graphs/contributors)

bukkit/pom.xml

@@ -0,0 +1,64 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project xmlns="http://maven.apache.org/POM/4.0.0"
+         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+    <parent>
+        <artifactId>viaversion-parent</artifactId>
+        <groupId>us.myles</groupId>
+        <version>1.0.0</version>
+    </parent>
+    <modelVersion>4.0.0</modelVersion>
+
+    <artifactId>viaversion-bukkit</artifactId>
+
+    <properties>
+        <!-- Change Bukkit Version HERE! -->
+        <bukkitVersion>1.8.8-R0.1-SNAPSHOT</bukkitVersion>
+    </properties>
+
+    <build>
+        <resources>
+            <resource>
+                <targetPath>.</targetPath>
+                <filtering>true</filtering>
+                <directory>src/main/resources/</directory>
+                <includes>
+                    <include>*</include>
+                </includes>
+            </resource>
+        </resources>
+    </build>
+
+    <dependencies>
+        <!-- Common Module -->
+        <dependency>
+            <groupId>us.myles</groupId>
+            <artifactId>viaversion-common</artifactId>
+            <version>${project.parent.version}</version>
+            <scope>provided</scope>
+        </dependency>
+
+        <!-- Bukkit API, http://www.spigotmc.org/ or http://bukkit.org/ -->
+        <dependency>
+            <groupId>org.bukkit</groupId>
+            <artifactId>bukkit</artifactId>
+            <version>${bukkitVersion}</version>
+            <scope>provided</scope>
+            <optional>true</optional>
+            <exclusions>
+                <exclusion>
+                    <artifactId>junit</artifactId>
+                    <groupId>junit</groupId>
+                </exclusion>
+                <exclusion>
+                    <artifactId>gson</artifactId>
+                    <groupId>com.google.code.gson</groupId>
+                </exclusion>
+                <exclusion>
+                    <artifactId>persistence-api</artifactId>
+                    <groupId>javax.persistence</groupId>
+                </exclusion>
+            </exclusions>
+        </dependency>
+    </dependencies>
+</project>

bukkit/src/main/java/us/myles/ViaVersion/ViaVersionPlugin.java

@@ -0,0 +1,256 @@
+package us.myles.ViaVersion;
+
+import com.google.gson.JsonObject;
+import lombok.Getter;
+import org.bukkit.Bukkit;
+import org.bukkit.ChatColor;
+import org.bukkit.entity.Player;
+import org.bukkit.plugin.Plugin;
+import org.bukkit.plugin.java.JavaPlugin;
+import us.myles.ViaVersion.api.Via;
+import us.myles.ViaVersion.api.ViaAPI;
+import us.myles.ViaVersion.api.ViaVersion;
+import us.myles.ViaVersion.api.command.ViaCommandSender;
+import us.myles.ViaVersion.api.configuration.ConfigurationProvider;
+import us.myles.ViaVersion.api.platform.TaskId;
+import us.myles.ViaVersion.api.platform.ViaPlatform;
+import us.myles.ViaVersion.bukkit.classgenerator.ClassGenerator;
+import us.myles.ViaVersion.bukkit.commands.BukkitCommandHandler;
+import us.myles.ViaVersion.bukkit.commands.BukkitCommandSender;
+import us.myles.ViaVersion.bukkit.platform.*;
+import us.myles.ViaVersion.bukkit.util.NMSUtil;
+import us.myles.ViaVersion.dump.PluginInfo;
+import us.myles.ViaVersion.util.GsonUtil;
+
+import java.util.ArrayList;
+import java.util.List;
+import java.util.UUID;
+
+public class ViaVersionPlugin extends JavaPlugin implements ViaPlatform {
+
+    private BukkitCommandHandler commandHandler;
+    private boolean compatSpigotBuild = false;
+    private boolean spigot = true;
+    private boolean lateBind = false;
+    private boolean protocolSupport = false;
+    @Getter
+    private BukkitConfigAPI conf;
+    @Getter
+    private ViaAPI<Player> api = new BukkitViaAPI(this);
+    private List<Runnable> queuedTasks = new ArrayList<>();
+    private List<Runnable> asyncQueuedTasks = new ArrayList<>();
+
+    public ViaVersionPlugin() {
+        // Command handler
+        commandHandler = new BukkitCommandHandler();
+        // Init platform
+        Via.init(ViaManager.builder()
+                .platform(this)
+                .commandHandler(commandHandler)
+                .injector(new BukkitViaInjector())
+                .loader(new BukkitViaLoader(this))
+                .build());
+        // Config magic
+        conf = new BukkitConfigAPI();
+        // For compatibility
+        ViaVersion.setInstance(this);
+
+        // Check if we're using protocol support too
+        protocolSupport = Bukkit.getPluginManager().getPlugin("ProtocolSupport") != null;
+
+        if (protocolSupport) {
+            getLogger().info("Hooking into ProtocolSupport, to prevent issues!");
+            try {
+                BukkitViaInjector.patchLists();
+            } catch (Exception e) {
+                e.printStackTrace();
+            }
+        }
+    }
+
+    @Override
+    public void onLoad() {
+        // Spigot detector
+        try {
+            Class.forName("org.spigotmc.SpigotConfig");
+        } catch (ClassNotFoundException e) {
+            spigot = false;
+        }
+
+        // Check if it's a spigot build with a protocol mod
+        try {
+            compatSpigotBuild = NMSUtil.nms("PacketEncoder").getDeclaredField("version") != null;
+        } catch (Exception e) {
+            compatSpigotBuild = false;
+        }
+
+        // Generate classes needed (only works if it's compat or ps)
+        ClassGenerator.generate();
+        lateBind = !BukkitViaInjector.isBinded();
+
+        getLogger().info("ViaVersion " + getDescription().getVersion() + (compatSpigotBuild ? "compat" : "") + " is now loaded" + (lateBind ? ", waiting for boot. (late-bind)" : ", injecting!"));
+        if (!lateBind) {
+            Via.getManager().init();
+        }
+    }
+
+    @Override
+    public void onEnable() {
+        if (lateBind) {
+            Via.getManager().init();
+        }
+
+        getCommand("viaversion").setExecutor(commandHandler);
+        getCommand("viaversion").setTabCompleter(commandHandler);
+
+        // Warn them if they have anti-xray on and they aren't using spigot
+        if (conf.isAntiXRay() && !spigot) {
+            getLogger().info("You have anti-xray on in your config, since you're not using spigot it won't fix xray!");
+        }
+
+        // Run queued tasks
+        for (Runnable r : queuedTasks) {
+            Bukkit.getScheduler().runTask(this, r);
+        }
+        queuedTasks.clear();
+
+        // Run async queued tasks
+        for (Runnable r : asyncQueuedTasks) {
+            Bukkit.getScheduler().runTaskAsynchronously(this, r);
+        }
+        asyncQueuedTasks.clear();
+    }
+
+    @Override
+    public void onDisable() {
+        Via.getManager().destroy();
+    }
+
+    public boolean isCompatSpigotBuild() {
+        return compatSpigotBuild;
+    }
+
+
+    public boolean isSpigot() {
+        return this.spigot;
+    }
+
+    public boolean isProtocolSupport() {
+        return protocolSupport;
+    }
+
+    @Override
+    public String getPlatformName() {
+        return Bukkit.getServer().getName();
+    }
+
+    @Override
+    public String getPlatformVersion() {
+        return Bukkit.getServer().getVersion();
+    }
+
+    @Override
+    public String getPluginVersion() {
+        return getDescription().getVersion();
+    }
+
+    @Override
+    public TaskId runAsync(Runnable runnable) {
+        if (isPluginEnabled()) {
+            return new BukkitTaskId(getServer().getScheduler().runTaskAsynchronously(this, runnable).getTaskId());
+        } else {
+            asyncQueuedTasks.add(runnable);
+            return new BukkitTaskId(null);
+        }
+    }
+
+    @Override
+    public TaskId runSync(Runnable runnable) {
+        if (isPluginEnabled()) {
+            return new BukkitTaskId(getServer().getScheduler().runTask(this, runnable).getTaskId());
+        } else {
+            queuedTasks.add(runnable);
+            return new BukkitTaskId(null);
+        }
+    }
+
+    @Override
+    public TaskId runRepeatingSync(Runnable runnable, Long ticks) {
+        return new BukkitTaskId(getServer().getScheduler().runTaskTimer(this, runnable, ticks, 0).getTaskId());
+    }
+
+    @Override
+    public void cancelTask(TaskId taskId) {
+        if (taskId == null) return;
+        if (taskId.getObject() == null) return;
+        if (taskId instanceof BukkitTaskId) {
+            getServer().getScheduler().cancelTask((Integer) taskId.getObject());
+        }
+    }
+
+    @Override
+    public ViaCommandSender[] getOnlinePlayers() {
+        ViaCommandSender[] array = new ViaCommandSender[Bukkit.getOnlinePlayers().size()];
+        int i = 0;
+        for (Player player : Bukkit.getOnlinePlayers()) {
+            array[i++] = new BukkitCommandSender(player);
+        }
+        return array;
+    }
+
+    @Override
+    public void sendMessage(UUID uuid, String message) {
+        Player player = Bukkit.getPlayer(uuid);
+        if (player != null) {
+            player.sendMessage(message);
+        }
+    }
+
+    @Override
+    public boolean kickPlayer(UUID uuid, String message) {
+        Player player = Bukkit.getPlayer(uuid);
+        if (player != null) {
+            player.kickPlayer(message);
+            return true;
+        } else {
+            return false;
+        }
+    }
+
+    @Override
+    public boolean isPluginEnabled() {
+        return Bukkit.getPluginManager().getPlugin("ViaVersion").isEnabled();
+    }
+
+    @Override
+    public ConfigurationProvider getConfigurationProvider() {
+        return conf;
+    }
+
+    @Override
+    public void onReload() {
+        if (Bukkit.getPluginManager().getPlugin("ProtocolLib") != null) {
+            getLogger().severe("ViaVersion is already loaded, we're going to kick all the players... because otherwise we'll crash because of ProtocolLib.");
+            for (Player player : Bukkit.getOnlinePlayers()) {
+                player.kickPlayer(ChatColor.translateAlternateColorCodes('&', getConf().getReloadDisconnectMsg()));
+            }
+
+        } else {
+            getLogger().severe("ViaVersion is already loaded, this should work fine. If you get any console errors, try rebooting.");
+        }
+    }
+
+    @Override
+    public JsonObject getDump() {
+        JsonObject platformSpecific = new JsonObject();
+
+        List<PluginInfo> plugins = new ArrayList<>();
+        for (Plugin p : Bukkit.getPluginManager().getPlugins())
+            plugins.add(new PluginInfo(p.isEnabled(), p.getDescription().getName(), p.getDescription().getVersion(), p.getDescription().getMain(), p.getDescription().getAuthors()));
+
+        platformSpecific.add("plugins", GsonUtil.getGson().toJsonTree(plugins));
+        // TODO more? ProtocolLib things etc?
+
+        return platformSpecific;
+    }
+}

bukkit/src/main/java/us/myles/ViaVersion/api/ViaVersion.java

@@ -0,0 +1,19 @@
+package us.myles.ViaVersion.api;
+
+import lombok.Getter;
+import org.apache.commons.lang.Validate;
+import us.myles.ViaVersion.ViaVersionPlugin;
+
+@Deprecated
+public class ViaVersion {
+    @Getter
+    private static ViaVersionAPI instance;
+    @Getter
+    private static ViaVersionConfig config;
+
+    public static void setInstance(ViaVersionPlugin plugin) {
+        Validate.isTrue(instance == null, "Instance is already set");
+        ViaVersion.instance = (ViaVersionAPI) plugin.getApi();
+        ViaVersion.config = plugin.getConf();
+    }
+}

bukkit/src/main/java/us/myles/ViaVersion/api/ViaVersionAPI.java

@@ -0,0 +1,144 @@
+package us.myles.ViaVersion.api;
+
+import io.netty.buffer.ByteBuf;
+import org.bukkit.entity.Player;
+import us.myles.ViaVersion.api.boss.BossBar;
+import us.myles.ViaVersion.api.boss.BossColor;
+import us.myles.ViaVersion.api.boss.BossStyle;
+import us.myles.ViaVersion.api.command.ViaVersionCommand;
+import us.myles.ViaVersion.api.protocol.ProtocolRegistry;
+
+import java.util.SortedSet;
+import java.util.UUID;
+
+@Deprecated
+public interface ViaVersionAPI extends ViaAPI<Player> {
+    /**
+     * Is the player connection modified by ViaVersion?
+     *
+     * @param player Bukkit player object
+     * @return True if the client is modified (At the moment it also means version 1.9 and higher)
+     * @deprecated As of 0.9.9, because all players are ported use {@link #getPlayerVersion(Player)}
+     */
+    boolean isPorted(Player player);
+
+    /**
+     * Get protocol number from a player
+     * Will also retrieve version from ProtocolSupport if it's being used.
+     *
+     * @param player Bukkit player object
+     * @return Protocol ID, For example (47=1.8-1.8.8, 107=1.9, 108=1.9.1)
+     */
+    int getPlayerVersion(Player player);
+
+    /**
+     * Get protocol number from a player
+     *
+     * @param uuid UUID of a player
+     * @return Protocol ID, For example (47=1.8-1.8.8, 107=1.9, 108=1.9.1)
+     */
+    int getPlayerVersion(UUID uuid);
+
+    /**
+     * Is player using 1.9?
+     *
+     * @param playerUUID UUID of a player
+     * @return True if the client is on 1.9
+     * @deprecated As of 0.9.9, because all players are ported use {@link #getPlayerVersion(UUID)}
+     */
+    @Deprecated
+    boolean isPorted(UUID playerUUID);
+
+    /**
+     * Get the version of the plugin
+     *
+     * @return Plugin version
+     */
+    String getVersion();
+
+    /**
+     * Send a raw packet to the player (Use new IDs)
+     *
+     * @param player The player to send packet
+     * @param packet The packet, you need a VarInt ID then the packet contents.
+     * @throws IllegalArgumentException If not on 1.9 throws IllegalArg
+     */
+    void sendRawPacket(Player player, ByteBuf packet) throws IllegalArgumentException;
+
+    /**
+     * Send a raw packet to the player (Use new IDs)
+     *
+     * @param uuid   The uuid from the player to send packet
+     * @param packet The packet, you need a VarInt ID then the packet contents.
+     * @throws IllegalArgumentException If not on 1.9 throws IllegalArg
+     */
+    void sendRawPacket(UUID uuid, ByteBuf packet) throws IllegalArgumentException;
+
+    /**
+     * Create a new bossbar instance
+     *
+     * @param title The title
+     * @param color The color
+     * @param style The style
+     * @return BossBar instance
+     */
+    BossBar createBossBar(String title, BossColor color, BossStyle style);
+
+    /**
+     * Create a new bossbar instance
+     *
+     * @param title  The title
+     * @param health Number between 0 and 1
+     * @param color  The color
+     * @param style  The style
+     * @return BossBar instance
+     */
+    BossBar createBossBar(String title, float health, BossColor color, BossStyle style);
+
+    /**
+     * Get if global debug is enabled
+     *
+     * @return true if debug is enabled
+     */
+    boolean isDebug();
+
+    /**
+     * Get ViaVersions commands handler
+     *
+     * @return commands handler
+     */
+    ViaVersionCommand getCommandHandler();
+
+    /**
+     * Get if this version is a compatibility build for spigot.
+     * Eg. 1.9.1 / 1.9.2 allow certain versions to connect
+     *
+     * @return True if it is
+     */
+    boolean isCompatSpigotBuild();
+
+    /**
+     * Get the supported protocol versions
+     * This method removes any blocked protocol versions.
+     *
+     * @return a list of protocol versions
+     * @see ProtocolRegistry#getSupportedVersions() for full list.
+     */
+    SortedSet<Integer> getSupportedVersions();
+
+    /**
+     * Gets if the server uses spigot
+     * <p>
+     * Note: Will only work after ViaVersion load
+     *
+     * @return True if spigot
+     */
+    boolean isSpigot();
+
+    /**
+     * Gets if protocol support is also being used.
+     *
+     * @return True if it is being used.
+     */
+    boolean isProtocolSupport();
+}

bukkit/src/main/java/us/myles/ViaVersion/boss/ViaBossBar.java

@@ -0,0 +1,34 @@
+package us.myles.ViaVersion.boss;
+
+import lombok.Getter;
+import org.bukkit.entity.Player;
+import us.myles.ViaVersion.api.boss.BossBar;
+import us.myles.ViaVersion.api.boss.BossColor;
+import us.myles.ViaVersion.api.boss.BossStyle;
+
+@Getter
+public class ViaBossBar extends CommonBoss<Player> {
+
+    public ViaBossBar(String title, float health, BossColor color, BossStyle style) {
+        super(title, health, color, style);
+    }
+
+    @Override
+    public BossBar addPlayer(Player player) {
+        addPlayer(player.getUniqueId());
+        return this;
+    }
+
+    @Override
+    public BossBar addPlayers(Player... players) {
+        for (Player p : players)
+            addPlayer(p);
+        return this;
+    }
+
+    @Override
+    public BossBar removePlayer(Player player) {
+        removePlayer(player.getUniqueId());
+        return this;
+    }
+}

bukkit/src/main/java/us/myles/ViaVersion/bukkit/classgenerator/BasicHandlerConstructor.java

@@ -0,0 +1,19 @@
+package us.myles.ViaVersion.bukkit.classgenerator;
+
+import io.netty.handler.codec.ByteToMessageDecoder;
+import io.netty.handler.codec.MessageToByteEncoder;
+import us.myles.ViaVersion.api.data.UserConnection;
+import us.myles.ViaVersion.bukkit.handlers.BukkitDecodeHandler;
+import us.myles.ViaVersion.bukkit.handlers.BukkitEncodeHandler;
+
+public class BasicHandlerConstructor implements HandlerConstructor {
+    @Override
+    public BukkitEncodeHandler newEncodeHandler(UserConnection info, MessageToByteEncoder minecraftEncoder) {
+        return new BukkitEncodeHandler(info, minecraftEncoder);
+    }
+
+    @Override
+    public BukkitDecodeHandler newDecodeHandler(UserConnection info, ByteToMessageDecoder minecraftDecoder) {
+        return new BukkitDecodeHandler(info, minecraftDecoder);
+    }
+}

bukkit/src/main/java/us/myles/ViaVersion/bukkit/classgenerator/ClassGenerator.java

@@ -0,0 +1,177 @@
+package us.myles.ViaVersion.bukkit.classgenerator;
+
+import javassist.*;
+import javassist.expr.ConstructorCall;
+import javassist.expr.ExprEditor;
+import org.bukkit.Bukkit;
+import org.bukkit.plugin.Plugin;
+import us.myles.ViaVersion.api.ViaVersion;
+import us.myles.ViaVersion.bukkit.handlers.BukkitDecodeHandler;
+import us.myles.ViaVersion.bukkit.handlers.BukkitEncodeHandler;
+import us.myles.ViaVersion.bukkit.util.NMSUtil;
+
+public class ClassGenerator {
+    private static HandlerConstructor constructor = new BasicHandlerConstructor();
+    private static String psPackage = null;
+
+    public static HandlerConstructor getConstructor() {
+        return constructor;
+    }
+
+    public static void generate() {
+        if (ViaVersion.getInstance().isCompatSpigotBuild() || ViaVersion.getInstance().isProtocolSupport()) {
+            try {
+                ClassPool pool = ClassPool.getDefault();
+                for (Plugin p : Bukkit.getPluginManager().getPlugins()) {
+                    pool.insertClassPath(new LoaderClassPath(p.getClass().getClassLoader()));
+                }
+
+                if (ViaVersion.getInstance().isCompatSpigotBuild()) {
+                    Class decodeSuper = NMSUtil.nms("PacketDecoder");
+                    Class encodeSuper = NMSUtil.nms("PacketEncoder");
+                    // Generate the classes
+                    addSpigotCompatibility(pool, BukkitDecodeHandler.class, decodeSuper);
+                    addSpigotCompatibility(pool, BukkitEncodeHandler.class, encodeSuper);
+                } else {
+                    Class decodeSuper = Class.forName(getPSPackage().equals("unknown") ? "protocolsupport.protocol.pipeline.common.PacketDecoder" : getPSPackage() + ".wrapped.WrappedDecoder");
+                    Class encodeSuper = Class.forName(getPSPackage().equals("unknown") ? "protocolsupport.protocol.pipeline.common.PacketEncoder" : getPSPackage() + ".wrapped.WrappedEncoder");
+                    // Generate the classes
+                    addPSCompatibility(pool, BukkitDecodeHandler.class, decodeSuper);
+                    addPSCompatibility(pool, BukkitEncodeHandler.class, encodeSuper);
+                }
+
+
+                // Implement Constructor
+                CtClass generated = pool.makeClass("us.myles.ViaVersion.classgenerator.generated.GeneratedConstructor");
+                CtClass handlerInterface = pool.get(HandlerConstructor.class.getName());
+
+                generated.setInterfaces(new CtClass[]{handlerInterface});
+                // Import required classes
+                pool.importPackage("us.myles.ViaVersion.classgenerator.generated");
+                pool.importPackage("us.myles.ViaVersion.classgenerator");
+                pool.importPackage("us.myles.ViaVersion.api.data");
+                pool.importPackage("io.netty.handler.codec");
+                // Implement Methods
+                generated.addMethod(CtMethod.make("public MessageToByteEncoder newEncodeHandler(UserConnection info, MessageToByteEncoder minecraftEncoder) {\n" +
+                        "        return new BukkitEncodeHandler(info, minecraftEncoder);\n" +
+                        "    }", generated));
+                generated.addMethod(CtMethod.make("public ByteToMessageDecoder newDecodeHandler(UserConnection info, ByteToMessageDecoder minecraftDecoder) {\n" +
+                        "        return new BukkitDecodeHandler(info, minecraftDecoder);\n" +
+                        "    }", generated));
+
+                constructor = (HandlerConstructor) generated.toClass(HandlerConstructor.class.getClassLoader()).newInstance();
+            } catch (ClassNotFoundException e) {
+                e.printStackTrace();
+            } catch (CannotCompileException e) {
+                e.printStackTrace();
+            } catch (NotFoundException e) {
+                e.printStackTrace();
+            } catch (InstantiationException e) {
+                e.printStackTrace();
+            } catch (IllegalAccessException e) {
+                e.printStackTrace();
+            }
+        }
+    }
+
+    private static Class addSpigotCompatibility(ClassPool pool, Class input, Class superclass) {
+        String newName = "us.myles.ViaVersion.classgenerator.generated." + input.getSimpleName();
+
+        try {
+            CtClass generated = pool.getAndRename(input.getName(), newName);
+            if (superclass != null) {
+                CtClass toExtend = pool.get(superclass.getName());
+                generated.setSuperclass(toExtend);
+
+                // If it's NMS satisfy constructor.
+                if (superclass.getName().startsWith("net.minecraft")) {
+                    // Modify constructor to call super
+                    if (generated.getConstructors().length != 0) {
+                        generated.getConstructors()[0].instrument(new ExprEditor() {
+                            @Override
+                            public void edit(ConstructorCall c) throws CannotCompileException {
+                                if (c.isSuper()) {
+                                    // Constructor for both has a stats thing.
+                                    c.replace("super(null);");
+                                }
+                                super.edit(c);
+                            }
+                        });
+                    }
+                }
+            }
+            return generated.toClass(HandlerConstructor.class.getClassLoader());
+        } catch (NotFoundException e) {
+            e.printStackTrace();
+        } catch (CannotCompileException e) {
+            e.printStackTrace();
+        }
+        return null;
+    }
+
+    private static Class addPSCompatibility(ClassPool pool, Class input, Class superclass) {
+        boolean newPS = getPSPackage().equals("unknown");
+        String newName = "us.myles.ViaVersion.classgenerator.generated." + input.getSimpleName();
+
+        try {
+            CtClass generated = pool.getAndRename(input.getName(), newName);
+            if (superclass != null) {
+                CtClass toExtend = pool.get(superclass.getName());
+                generated.setSuperclass(toExtend);
+
+                if (!newPS) {
+                    // Override setRealEncoder / setRealDecoder
+                    pool.importPackage(getPSPackage());
+                    pool.importPackage(getPSPackage() + ".wrapped");
+                    if (superclass.getName().endsWith("Decoder")) {
+                        // Decoder
+                        generated.addMethod(CtMethod.make("public void setRealDecoder(IPacketDecoder dec) {\n" +
+                                "        ((WrappedDecoder) this.minecraftDecoder).setRealDecoder(dec);\n" +
+                                "    }", generated));
+                    } else {
+                        // Encoder
+                        pool.importPackage("protocolsupport.api");
+                        pool.importPackage("java.lang.reflect");
+                        generated.addMethod(CtMethod.make("public void setRealEncoder(IPacketEncoder enc) {\n" +
+                                "         try {\n" +
+                                // Tell ProtocolSupport to decode MINECRAFT_FUTURE packets using the default decoder (for 1.9.4)
+                                "             Field field = enc.getClass().getDeclaredField(\"version\");\n" +
+                                "             field.setAccessible(true);\n" +
+                                "             ProtocolVersion version = (ProtocolVersion) field.get(enc);\n" +
+
+                                "             if (version == ProtocolVersion.MINECRAFT_FUTURE) enc = enc.getClass().getConstructor(\n" +
+                                "                 new Class[]{ProtocolVersion.class}).newInstance(new Object[] {ProtocolVersion.getLatest()});\n" +
+                                "         } catch (Exception e) {\n" +
+                                // I guess we're not on 1.9.4
+                                "         }\n" +
+                                "        ((WrappedEncoder) this.minecraftEncoder).setRealEncoder(enc);\n" +
+                                "    }", generated));
+                    }
+                }
+            }
+            return generated.toClass(HandlerConstructor.class.getClassLoader());
+        } catch (NotFoundException e) {
+            e.printStackTrace();
+        } catch (CannotCompileException e) {
+            e.printStackTrace();
+        }
+        return null;
+    }
+
+    public static String getPSPackage() {
+        if (psPackage == null) {
+            try {
+                Class.forName("protocolsupport.protocol.core.IPacketDecoder");
+                psPackage = "protocolsupport.protocol.core";
+            } catch (ClassNotFoundException e) {
+                try {
+                    Class.forName("protocolsupport.protocol.pipeline.IPacketDecoder");
+                    psPackage = "protocolsupport.protocol.pipeline";
+                } catch (ClassNotFoundException e1) {
+                    psPackage = "unknown";
+                }
+            }
+        }
+        return psPackage;
+    }
+}

bukkit/src/main/java/us/myles/ViaVersion/bukkit/classgenerator/HandlerConstructor.java

@@ -0,0 +1,11 @@
+package us.myles.ViaVersion.bukkit.classgenerator;
+
+import io.netty.handler.codec.ByteToMessageDecoder;
+import io.netty.handler.codec.MessageToByteEncoder;
+import us.myles.ViaVersion.api.data.UserConnection;
+
+public interface HandlerConstructor {
+    public MessageToByteEncoder newEncodeHandler(UserConnection info, MessageToByteEncoder minecraftEncoder);
+
+    public ByteToMessageDecoder newDecodeHandler(UserConnection info, ByteToMessageDecoder minecraftDecoder);
+}

bukkit/src/main/java/us/myles/ViaVersion/bukkit/commands/BukkitCommandHandler.java

@@ -0,0 +1,21 @@
+package us.myles.ViaVersion.bukkit.commands;
+
+import org.bukkit.command.Command;
+import org.bukkit.command.CommandExecutor;
+import org.bukkit.command.CommandSender;
+import org.bukkit.command.TabExecutor;
+import us.myles.ViaVersion.commands.ViaCommandHandler;
+
+import java.util.List;
+
+public class BukkitCommandHandler extends ViaCommandHandler implements CommandExecutor, TabExecutor {
+    @Override
+    public boolean onCommand(CommandSender sender, Command command, String label, String[] args) {
+        return onCommand(new BukkitCommandSender(sender), args);
+    }
+
+    @Override
+    public List<String> onTabComplete(CommandSender sender, Command command, String alias, String[] args) {
+        return onTabComplete(new BukkitCommandSender(sender), args);
+    }
+}

bukkit/src/main/java/us/myles/ViaVersion/bukkit/commands/BukkitCommandSender.java

@@ -0,0 +1,37 @@
+package us.myles.ViaVersion.bukkit.commands;
+
+import lombok.AllArgsConstructor;
+import org.bukkit.command.CommandSender;
+import org.bukkit.entity.Player;
+import us.myles.ViaVersion.api.command.ViaCommandSender;
+
+import java.util.UUID;
+
+@AllArgsConstructor
+public class BukkitCommandSender implements ViaCommandSender {
+    private CommandSender sender;
+
+    @Override
+    public boolean hasPermission(String permission) {
+        return sender.hasPermission(permission);
+    }
+
+    @Override
+    public void sendMessage(String msg) {
+        sender.sendMessage(msg);
+    }
+
+    @Override
+    public UUID getUUID() {
+        if (sender instanceof Player) {
+            return ((Player) sender).getUniqueId();
+        } else {
+            return UUID.fromString(getName());
+        }
+    }
+
+    @Override
+    public String getName() {
+        return sender.getName();
+    }
+}

bukkit/src/main/java/us/myles/ViaVersion/bukkit/handlers/BukkitChannelInitializer.java

@@ -0,0 +1,52 @@
+package us.myles.ViaVersion.bukkit.handlers;
+
+import io.netty.channel.Channel;
+import io.netty.channel.ChannelInitializer;
+import io.netty.channel.socket.SocketChannel;
+import io.netty.handler.codec.ByteToMessageDecoder;
+import io.netty.handler.codec.MessageToByteEncoder;
+import us.myles.ViaVersion.api.data.UserConnection;
+import us.myles.ViaVersion.api.protocol.ProtocolPipeline;
+import us.myles.ViaVersion.bukkit.classgenerator.ClassGenerator;
+import us.myles.ViaVersion.bukkit.classgenerator.HandlerConstructor;
+
+import java.lang.reflect.Method;
+
+public class BukkitChannelInitializer extends ChannelInitializer<SocketChannel> {
+
+    private final ChannelInitializer<SocketChannel> original;
+    private Method method;
+
+    public BukkitChannelInitializer(ChannelInitializer<SocketChannel> oldInit) {
+        this.original = oldInit;
+        try {
+            this.method = ChannelInitializer.class.getDeclaredMethod("initChannel", Channel.class);
+            this.method.setAccessible(true);
+        } catch (NoSuchMethodException e) {
+            e.printStackTrace();
+        }
+    }
+
+    public ChannelInitializer<SocketChannel> getOriginal() {
+        return original;
+    }
+
+    @Override
+    protected void initChannel(SocketChannel socketChannel) throws Exception {
+        UserConnection info = new UserConnection(socketChannel);
+        // init protocol
+        new ProtocolPipeline(info);
+        // Add originals
+        this.method.invoke(this.original, socketChannel);
+
+        HandlerConstructor constructor = ClassGenerator.getConstructor();
+        // Add our transformers
+        MessageToByteEncoder encoder = constructor.newEncodeHandler(info, (MessageToByteEncoder) socketChannel.pipeline().get("encoder"));
+        ByteToMessageDecoder decoder = constructor.newDecodeHandler(info, (ByteToMessageDecoder) socketChannel.pipeline().get("decoder"));
+        BukkitPacketHandler chunkHandler = new BukkitPacketHandler(info);
+
+        socketChannel.pipeline().replace("encoder", "encoder", encoder);
+        socketChannel.pipeline().replace("decoder", "decoder", decoder);
+        socketChannel.pipeline().addAfter("packet_handler", "viaversion_packet_handler", chunkHandler);
+    }
+}

bukkit/src/main/java/us/myles/ViaVersion/bukkit/handlers/BukkitDecodeHandler.java

@@ -0,0 +1,89 @@
+package us.myles.ViaVersion.bukkit.handlers;
+
+import io.netty.buffer.ByteBuf;
+import io.netty.channel.ChannelHandlerContext;
+import io.netty.handler.codec.ByteToMessageDecoder;
+import us.myles.ViaVersion.api.PacketWrapper;
+import us.myles.ViaVersion.api.data.UserConnection;
+import us.myles.ViaVersion.api.type.Type;
+import us.myles.ViaVersion.exception.CancelException;
+import us.myles.ViaVersion.packets.Direction;
+import us.myles.ViaVersion.protocols.base.ProtocolInfo;
+import us.myles.ViaVersion.util.PipelineUtil;
+
+import java.lang.reflect.InvocationTargetException;
+import java.util.List;
+
+public class BukkitDecodeHandler extends ByteToMessageDecoder {
+
+    private final ByteToMessageDecoder minecraftDecoder;
+    private final UserConnection info;
+
+    public BukkitDecodeHandler(UserConnection info, ByteToMessageDecoder minecraftDecoder) {
+        this.info = info;
+        this.minecraftDecoder = minecraftDecoder;
+    }
+
+    @Override
+    protected void decode(ChannelHandlerContext ctx, ByteBuf bytebuf, List<Object> list) throws Exception {
+        // use transformers
+        if (bytebuf.readableBytes() > 0) {
+            // Ignore if pending disconnect
+            if (info.isPendingDisconnect()) {
+                return;
+            }
+            // Increment received
+            boolean second = info.incrementReceived();
+            // Check PPS
+            if (second) {
+                if (info.handlePPS())
+                    return;
+            }
+
+            if (info.isActive()) {
+                // Handle ID
+                int id = Type.VAR_INT.read(bytebuf);
+                // Transform
+                ByteBuf newPacket = ctx.alloc().buffer();
+                try {
+                    if (id == PacketWrapper.PASSTHROUGH_ID) {
+                        newPacket.writeBytes(bytebuf);
+                    } else {
+                        PacketWrapper wrapper = new PacketWrapper(id, bytebuf, info);
+                        ProtocolInfo protInfo = info.get(ProtocolInfo.class);
+                        protInfo.getPipeline().transform(Direction.INCOMING, protInfo.getState(), wrapper);
+                        wrapper.writeToBuffer(newPacket);
+                    }
+
+                    bytebuf.clear();
+                    bytebuf = newPacket;
+                } catch (Exception e) {
+                    // Clear Buffer
+                    bytebuf.clear();
+                    // Release Packet, be free!
+                    newPacket.release();
+                    throw e;
+                }
+            }
+
+            // call minecraft decoder
+            try {
+                list.addAll(PipelineUtil.callDecode(this.minecraftDecoder, ctx, bytebuf));
+            } catch (InvocationTargetException e) {
+                if (e.getCause() instanceof Exception) {
+                    throw (Exception) e.getCause();
+                }
+            } finally {
+                if (info.isActive()) {
+                    bytebuf.release();
+                }
+            }
+        }
+    }
+
+    @Override
+    public void exceptionCaught(ChannelHandlerContext ctx, Throwable cause) throws Exception {
+        if (PipelineUtil.containsCause(cause, CancelException.class)) return;
+        super.exceptionCaught(ctx, cause);
+    }
+}

bukkit/src/main/java/us/myles/ViaVersion/bukkit/handlers/BukkitEncodeHandler.java

@@ -0,0 +1,93 @@
+package us.myles.ViaVersion.bukkit.handlers;
+
+import io.netty.buffer.ByteBuf;
+import io.netty.channel.ChannelHandlerContext;
+import io.netty.handler.codec.MessageToByteEncoder;
+import us.myles.ViaVersion.api.PacketWrapper;
+import us.myles.ViaVersion.api.data.UserConnection;
+import us.myles.ViaVersion.api.type.Type;
+import us.myles.ViaVersion.bukkit.util.NMSUtil;
+import us.myles.ViaVersion.exception.CancelException;
+import us.myles.ViaVersion.handlers.ChannelHandlerContextWrapper;
+import us.myles.ViaVersion.handlers.ViaHandler;
+import us.myles.ViaVersion.packets.Direction;
+import us.myles.ViaVersion.protocols.base.ProtocolInfo;
+import us.myles.ViaVersion.util.PipelineUtil;
+
+import java.lang.reflect.Field;
+import java.lang.reflect.InvocationTargetException;
+
+public class BukkitEncodeHandler extends MessageToByteEncoder implements ViaHandler {
+    private static Field versionField = null;
+
+    static {
+        try {
+            versionField = NMSUtil.nms("PacketEncoder").getDeclaredField("version");
+            versionField.setAccessible(true);
+        } catch (Exception e) {
+            // Not compat version
+        }
+    }
+
+    private final UserConnection info;
+    private final MessageToByteEncoder minecraftEncoder;
+
+    public BukkitEncodeHandler(UserConnection info, MessageToByteEncoder minecraftEncoder) {
+        this.info = info;
+        this.minecraftEncoder = minecraftEncoder;
+    }
+
+
+    @Override
+    protected void encode(final ChannelHandlerContext ctx, Object o, final ByteBuf bytebuf) throws Exception {
+        if (versionField != null) {
+            versionField.set(minecraftEncoder, versionField.get(this));
+        }
+        // handle the packet type
+        if (!(o instanceof ByteBuf)) {
+            // call minecraft encoder
+            try {
+                PipelineUtil.callEncode(this.minecraftEncoder, new ChannelHandlerContextWrapper(ctx, this), o, bytebuf);
+            } catch (InvocationTargetException e) {
+                if (e.getCause() instanceof Exception) {
+                    throw (Exception) e.getCause();
+                }
+            }
+        }
+
+        transform(bytebuf);
+    }
+
+    public void transform(ByteBuf bytebuf) throws Exception {
+        if (bytebuf.readableBytes() == 0) {
+            return; // Someone Already Decoded It!
+        }
+        // Increment sent
+        info.incrementSent();
+        if (info.isActive()) {
+            // Handle ID
+            int id = Type.VAR_INT.read(bytebuf);
+            // Transform
+            ByteBuf oldPacket = bytebuf.copy();
+            bytebuf.clear();
+
+            try {
+                PacketWrapper wrapper = new PacketWrapper(id, oldPacket, info);
+                ProtocolInfo protInfo = info.get(ProtocolInfo.class);
+                protInfo.getPipeline().transform(Direction.OUTGOING, protInfo.getState(), wrapper);
+                wrapper.writeToBuffer(bytebuf);
+            } catch (Exception e) {
+                bytebuf.clear();
+                throw e;
+            } finally {
+                oldPacket.release();
+            }
+        }
+    }
+
+    @Override
+    public void exceptionCaught(ChannelHandlerContext ctx, Throwable cause) throws Exception {
+        if (PipelineUtil.containsCause(cause, CancelException.class)) return;
+        super.exceptionCaught(ctx, cause);
+    }
+}

bukkit/src/main/java/us/myles/ViaVersion/bukkit/handlers/BukkitPacketHandler.java

@@ -0,0 +1,35 @@
+package us.myles.ViaVersion.bukkit.handlers;
+
+import io.netty.buffer.ByteBuf;
+import io.netty.channel.ChannelHandlerContext;
+import io.netty.handler.codec.MessageToMessageEncoder;
+import us.myles.ViaVersion.api.data.UserConnection;
+import us.myles.ViaVersion.protocols.base.ProtocolInfo;
+
+import java.util.List;
+
+public class BukkitPacketHandler extends MessageToMessageEncoder {
+    private final UserConnection info;
+
+    public BukkitPacketHandler(UserConnection info) {
+        this.info = info;
+    }
+
+    @Override
+    protected void encode(ChannelHandlerContext ctx, Object o, List list) throws Exception {
+        // Split chunks bulk packet up in to single chunks packets before it reached the encoder.
+        // This will prevent issues with several plugins and other protocol handlers due to the chunks being sent twice.
+        // It also sends the chunks in the right order possible resolving some issues with added chunks/block/entity data.
+        if (!(o instanceof ByteBuf)) {
+            info.setLastPacket(o);
+            /* This transformer is more for fixing issues which we find hard at packet level :) */
+            if (info.isActive()) {
+                if (info.get(ProtocolInfo.class).getPipeline().filter(o, list)) {
+                    return;
+                }
+            }
+        }
+
+        list.add(o);
+    }
+}

bukkit/src/main/java/us/myles/ViaVersion/bukkit/listeners/UpdateListener.java

@@ -0,0 +1,18 @@
+package us.myles.ViaVersion.bukkit.listeners;
+
+import org.bukkit.event.EventHandler;
+import org.bukkit.event.Listener;
+import org.bukkit.event.player.PlayerJoinEvent;
+import us.myles.ViaVersion.api.Via;
+import us.myles.ViaVersion.update.UpdateUtil;
+
+public class UpdateListener implements Listener {
+
+    @EventHandler
+    public void onJoin(PlayerJoinEvent e) {
+        if (e.getPlayer().hasPermission("viaversion.update")
+                && Via.getConfig().isCheckForUpdates()) {
+            UpdateUtil.sendUpdateMessage(e.getPlayer().getUniqueId());
+        }
+    }
+}

bukkit/src/main/java/us/myles/ViaVersion/bukkit/listeners/ViaBukkitListener.java

@@ -0,0 +1,53 @@
+package us.myles.ViaVersion.bukkit.listeners;
+
+import lombok.AccessLevel;
+import lombok.Getter;
+import lombok.NonNull;
+import org.bukkit.entity.Player;
+import org.bukkit.event.Listener;
+import org.bukkit.plugin.Plugin;
+import us.myles.ViaVersion.ViaVersionPlugin;
+import us.myles.ViaVersion.api.ViaListener;
+import us.myles.ViaVersion.api.data.UserConnection;
+import us.myles.ViaVersion.api.protocol.Protocol;
+
+@Getter(AccessLevel.PROTECTED)
+public class ViaBukkitListener extends ViaListener implements Listener {
+    private final Plugin plugin;
+
+    public ViaBukkitListener(ViaVersionPlugin plugin, Class<? extends Protocol> requiredPipeline) {
+        super(requiredPipeline);
+        this.plugin = plugin;
+    }
+
+    /**
+     * Get the UserConnection from a player
+     *
+     * @param player Player object
+     * @return The UserConnection
+     */
+    protected UserConnection getUserConnection(@NonNull Player player) {
+        return getUserConnection(player.getUniqueId());
+    }
+
+    /**
+     * Checks if the player is on the selected pipe
+     *
+     * @param player Player Object
+     * @return True if on pipe
+     */
+    protected boolean isOnPipe(Player player) {
+        return isOnPipe(player.getUniqueId());
+    }
+
+    /**
+     * Register as Bukkit event
+     */
+    @Override
+    public void register() {
+        if (isRegistered()) return;
+
+        plugin.getServer().getPluginManager().registerEvents(this, plugin);
+        setRegistered(true);
+    }
+}

bukkit/src/main/java/us/myles/ViaVersion/bukkit/listeners/protocol1_9to1_8/ArmorListener.java

@@ -0,0 +1,118 @@
+package us.myles.ViaVersion.bukkit.listeners.protocol1_9to1_8;
+
+import org.bukkit.Bukkit;
+import org.bukkit.entity.HumanEntity;
+import org.bukkit.entity.Player;
+import org.bukkit.event.EventHandler;
+import org.bukkit.event.EventPriority;
+import org.bukkit.event.block.Action;
+import org.bukkit.event.inventory.InventoryClickEvent;
+import org.bukkit.event.player.PlayerChangedWorldEvent;
+import org.bukkit.event.player.PlayerInteractEvent;
+import org.bukkit.event.player.PlayerJoinEvent;
+import org.bukkit.event.player.PlayerRespawnEvent;
+import org.bukkit.inventory.CraftingInventory;
+import org.bukkit.inventory.ItemStack;
+import us.myles.ViaVersion.ViaVersionPlugin;
+import us.myles.ViaVersion.api.PacketWrapper;
+import us.myles.ViaVersion.api.Via;
+import us.myles.ViaVersion.api.type.Type;
+import us.myles.ViaVersion.bukkit.listeners.ViaBukkitListener;
+import us.myles.ViaVersion.protocols.protocol1_9to1_8.ArmorType;
+import us.myles.ViaVersion.protocols.protocol1_9to1_8.Protocol1_9TO1_8;
+
+import java.util.UUID;
+
+public class ArmorListener extends ViaBukkitListener {
+
+    private static final UUID ARMOR_ATTRIBUTE = UUID.fromString("2AD3F246-FEE1-4E67-B886-69FD380BB150");
+
+    public ArmorListener(ViaVersionPlugin plugin) {
+        super(plugin, Protocol1_9TO1_8.class);
+    }
+
+    public void sendArmorUpdate(Player player) {
+        // Ensure that the player is on our pipe
+        if (!isOnPipe(player)) return;
+
+
+        int armor = 0;
+        for (ItemStack stack : player.getInventory().getArmorContents()) {
+            armor += ArmorType.findById(stack.getTypeId()).getArmorPoints();
+        }
+
+        PacketWrapper wrapper = new PacketWrapper(0x4B, null, getUserConnection(player));
+        try {
+            wrapper.write(Type.VAR_INT, player.getEntityId()); // Player ID
+            wrapper.write(Type.INT, 1); // only 1 property
+            wrapper.write(Type.STRING, "generic.armor");
+            wrapper.write(Type.DOUBLE, 0D); //default 0 armor
+            wrapper.write(Type.VAR_INT, 1); // 1 modifier
+            wrapper.write(Type.UUID, ARMOR_ATTRIBUTE); // armor modifier uuid
+            wrapper.write(Type.DOUBLE, (double) armor); // the modifier value
+            wrapper.write(Type.BYTE, (byte) 0);// the modifier operation, 0 is add number
+
+            wrapper.send(Protocol1_9TO1_8.class);
+        } catch (Exception e) {
+            e.printStackTrace();
+        }
+    }
+
+    @EventHandler(priority = EventPriority.MONITOR, ignoreCancelled = true)
+    public void onInventoryClick(InventoryClickEvent e) {
+        HumanEntity human = e.getWhoClicked();
+        if (human instanceof Player && e.getInventory() instanceof CraftingInventory) {
+            final Player player = (Player) human;
+            if (e.getCurrentItem() != null) {
+                if (ArmorType.isArmor(e.getCurrentItem().getTypeId())) {
+                    sendDelayedArmorUpdate(player);
+                    return;
+                }
+            }
+            if (e.getRawSlot() >= 5 && e.getRawSlot() <= 8) {
+                sendDelayedArmorUpdate(player);
+            }
+        }
+    }
+
+    @EventHandler(priority = EventPriority.MONITOR, ignoreCancelled = true)
+    public void onInteract(PlayerInteractEvent e) {
+        if (e.getItem() != null) {
+            if (e.getAction() == Action.RIGHT_CLICK_AIR || e.getAction() == Action.RIGHT_CLICK_BLOCK) {
+                final Player player = e.getPlayer();
+                // Due to odd bugs it's 3 ticks later
+                Bukkit.getScheduler().scheduleSyncDelayedTask(getPlugin(), new Runnable() {
+                    @Override
+                    public void run() {
+                        sendArmorUpdate(player);
+                    }
+                }, 3L);
+            }
+        }
+    }
+
+    @EventHandler(priority = EventPriority.MONITOR, ignoreCancelled = true)
+    public void onJoin(PlayerJoinEvent e) {
+        sendDelayedArmorUpdate(e.getPlayer());
+    }
+
+    @EventHandler(priority = EventPriority.MONITOR, ignoreCancelled = true)
+    public void onRespawn(PlayerRespawnEvent e) {
+        sendDelayedArmorUpdate(e.getPlayer());
+    }
+
+    @EventHandler(priority = EventPriority.MONITOR, ignoreCancelled = true)
+    public void onWorldChange(PlayerChangedWorldEvent e) {
+        sendArmorUpdate(e.getPlayer());
+    }
+
+    public void sendDelayedArmorUpdate(final Player player) {
+        if (!isOnPipe(player)) return; // Don't start a task if the player is not on the pipe
+        Via.getPlatform().runSync(new Runnable() {
+            @Override
+            public void run() {
+                sendArmorUpdate(player);
+            }
+        });
+    }
+}

bukkit/src/main/java/us/myles/ViaVersion/bukkit/listeners/protocol1_9to1_8/BlockListener.java

@@ -0,0 +1,28 @@
+package us.myles.ViaVersion.bukkit.listeners.protocol1_9to1_8;
+
+import org.bukkit.block.Block;
+import org.bukkit.event.EventHandler;
+import org.bukkit.event.EventPriority;
+import org.bukkit.event.block.BlockPlaceEvent;
+import us.myles.ViaVersion.ViaVersionPlugin;
+import us.myles.ViaVersion.api.minecraft.Position;
+import us.myles.ViaVersion.bukkit.listeners.ViaBukkitListener;
+import us.myles.ViaVersion.protocols.protocol1_9to1_8.Protocol1_9TO1_8;
+import us.myles.ViaVersion.protocols.protocol1_9to1_8.storage.EntityTracker;
+
+public class BlockListener extends ViaBukkitListener {
+
+    public BlockListener(ViaVersionPlugin plugin) {
+        super(plugin, Protocol1_9TO1_8.class);
+    }
+
+    @EventHandler(priority = EventPriority.MONITOR, ignoreCancelled = true)
+    public void placeBlock(BlockPlaceEvent e) {
+        if (isOnPipe(e.getPlayer())) {
+            Block b = e.getBlockPlaced();
+            getUserConnection(e.getPlayer())
+                    .get(EntityTracker.class)
+                    .addBlockInteraction(new Position((long) b.getX(), (long) b.getY(), (long) b.getZ()));
+        }
+    }
+}

bukkit/src/main/java/us/myles/ViaVersion/bukkit/listeners/protocol1_9to1_8/DeathListener.java

@@ -0,0 +1,54 @@
+package us.myles.ViaVersion.bukkit.listeners.protocol1_9to1_8;
+
+import org.bukkit.World;
+import org.bukkit.entity.Player;
+import org.bukkit.event.EventHandler;
+import org.bukkit.event.EventPriority;
+import org.bukkit.event.entity.PlayerDeathEvent;
+import us.myles.ViaVersion.ViaVersionPlugin;
+import us.myles.ViaVersion.api.PacketWrapper;
+import us.myles.ViaVersion.api.Via;
+import us.myles.ViaVersion.api.ViaVersion;
+import us.myles.ViaVersion.api.type.Type;
+import us.myles.ViaVersion.bukkit.listeners.ViaBukkitListener;
+import us.myles.ViaVersion.protocols.protocol1_9to1_8.Protocol1_9TO1_8;
+
+public class DeathListener extends ViaBukkitListener {
+    public DeathListener(ViaVersionPlugin plugin) {
+        super(plugin, Protocol1_9TO1_8.class);
+    }
+
+    @EventHandler(ignoreCancelled = true, priority = EventPriority.MONITOR)
+    public void onDeath(PlayerDeathEvent e) {
+        Player p = e.getEntity();
+        if (isOnPipe(p) && ViaVersion.getConfig().isShowNewDeathMessages() && checkGamerule(p.getWorld()) && e.getDeathMessage() != null)
+            sendPacket(p, e.getDeathMessage());
+    }
+
+    public boolean checkGamerule(World w) {
+        try {
+            return Boolean.parseBoolean(w.getGameRuleValue("showDeathMessages"));
+        } catch (Exception e) {
+            return false;
+        }
+    }
+
+    private void sendPacket(final Player p, final String msg) {
+        Via.getPlatform().runSync(new Runnable() {
+            @Override
+            public void run() {
+                PacketWrapper wrapper = new PacketWrapper(0x2C, null, getUserConnection(p));
+                try {
+                    wrapper.write(Type.VAR_INT, 2); // Event - Entity dead
+                    wrapper.write(Type.VAR_INT, p.getEntityId()); // Player ID
+                    wrapper.write(Type.INT, p.getEntityId()); // Entity ID
+                    Protocol1_9TO1_8.FIX_JSON.write(wrapper, msg); // Message
+
+                    wrapper.send(Protocol1_9TO1_8.class);
+                } catch (Exception e) {
+                    e.printStackTrace();
+                }
+            }
+        });
+    }
+}

bukkit/src/main/java/us/myles/ViaVersion/bukkit/listeners/protocol1_9to1_8/HandItemCache.java

@@ -0,0 +1,42 @@
+package us.myles.ViaVersion.bukkit.listeners.protocol1_9to1_8;
+
+import org.bukkit.Bukkit;
+import org.bukkit.entity.Player;
+import org.bukkit.inventory.ItemStack;
+import org.bukkit.scheduler.BukkitRunnable;
+import us.myles.ViaVersion.api.minecraft.item.Item;
+
+import java.util.ArrayList;
+import java.util.List;
+import java.util.UUID;
+import java.util.concurrent.ConcurrentHashMap;
+
+public class HandItemCache extends BukkitRunnable {
+    public static boolean CACHE = false;
+    private static ConcurrentHashMap<UUID, Item> handCache = new ConcurrentHashMap<>();
+
+    public static Item getHandItem(UUID player) {
+        if (!handCache.containsKey(player))
+            return null;
+        return handCache.get(player);
+    }
+
+    @Override
+    public void run() {
+        List<UUID> players = new ArrayList<>(handCache.keySet());
+
+        for (Player p : Bukkit.getOnlinePlayers()) {
+            handCache.put(p.getUniqueId(), convert(p.getItemInHand()));
+            players.remove(p.getUniqueId());
+        }
+        // Remove offline players
+        for (UUID uuid : players) {
+            handCache.remove(uuid);
+        }
+    }
+
+    public static Item convert(ItemStack itemInHand) {
+        if (itemInHand == null) return new Item((short) 0, (byte) 0, (short) 0, null);
+        return new Item((short) itemInHand.getTypeId(), (byte) itemInHand.getAmount(), itemInHand.getDurability(), null);
+    }
+}

bukkit/src/main/java/us/myles/ViaVersion/bukkit/listeners/protocol1_9to1_8/PaperPatch.java

@@ -0,0 +1,58 @@
+package us.myles.ViaVersion.bukkit.listeners.protocol1_9to1_8;
+
+import org.bukkit.Location;
+import org.bukkit.Material;
+import org.bukkit.block.BlockFace;
+import org.bukkit.event.EventHandler;
+import org.bukkit.event.block.BlockPlaceEvent;
+import us.myles.ViaVersion.ViaVersionPlugin;
+import us.myles.ViaVersion.bukkit.listeners.ViaBukkitListener;
+import us.myles.ViaVersion.protocols.protocol1_9to1_8.Protocol1_9TO1_8;
+
+public class PaperPatch extends ViaBukkitListener {
+
+    public PaperPatch(ViaVersionPlugin plugin) {
+        super(plugin, Protocol1_9TO1_8.class);
+    }
+
+    /*
+    This patch is applied when Paper is detected.
+    I'm unsure of what causes this but essentially,
+    placing blocks where you're standing works?
+    If there is a better fix then we'll replace this.
+     */
+
+    @EventHandler(ignoreCancelled = true)
+    public void onPlace(BlockPlaceEvent e) {
+        if (isOnPipe(e.getPlayer())) {
+            Location diff = e.getPlayer().getLocation().subtract(e.getBlock().getLocation().add(0.5D, 0, 0.5D));
+            Material block = e.getBlockPlaced().getType();
+            if (!block.isSolid()) {
+                return;
+            }
+            if (e.getPlayer().getLocation().getBlock().equals(e.getBlock())) {
+                e.setCancelled(true);
+            } else {
+                if (e.getPlayer().getLocation().getBlock().getRelative(BlockFace.UP).equals(e.getBlock())) {
+                    e.setCancelled(true);
+                } else {
+                    // Within radius of block
+                    if (Math.abs(diff.getX()) <= 0.8 && Math.abs(diff.getZ()) <= 0.8D) {
+                        // Are they on the edge / shifting ish
+                        if (diff.getY() <= 0.1D && diff.getY() >= -0.1D) {
+                            e.setCancelled(true);
+                            return;
+                        }
+                        BlockFace relative = e.getBlockAgainst().getFace(e.getBlock());
+                        // Are they towering up, (handles some latency)
+                        if (relative == BlockFace.UP) {
+                            if (diff.getY() < 1D && diff.getY() >= 0D) {
+                                e.setCancelled(true);
+                            }
+                        }
+                    }
+                }
+            }
+        }
+    }
+}

bukkit/src/main/java/us/myles/ViaVersion/bukkit/platform/BukkitConfigAPI.java

@@ -0,0 +1,179 @@
+package us.myles.ViaVersion.bukkit.platform;
+
+import us.myles.ViaVersion.ViaVersionPlugin;
+import us.myles.ViaVersion.api.Via;
+import us.myles.ViaVersion.api.ViaVersionConfig;
+import us.myles.ViaVersion.util.Config;
+
+import java.io.File;
+import java.util.Arrays;
+import java.util.List;
+import java.util.Map;
+
+public class BukkitConfigAPI extends Config implements ViaVersionConfig {
+    private static List<String> UNSUPPORTED = Arrays.asList("bungee-ping-interval", "bungee-ping-save", "bungee-servers");
+
+    public BukkitConfigAPI() {
+        super(new File(((ViaVersionPlugin) Via.getPlatform()).getDataFolder(), "config.yml"));
+    }
+
+    @Override
+    public boolean isCheckForUpdates() {
+        return getBoolean("checkforupdates", true);
+    }
+
+    @Override
+    public boolean isPreventCollision() {
+        return getBoolean("prevent-collision", true);
+    }
+
+    @Override
+    public boolean isNewEffectIndicator() {
+        return getBoolean("use-new-effect-indicator", true);
+    }
+
+    @Override
+    public boolean isShowNewDeathMessages() {
+        return getBoolean("use-new-deathmessages", true);
+    }
+
+    @Override
+    public boolean isSuppressMetadataErrors() {
+        return getBoolean("suppress-metadata-errors", false);
+    }
+
+    @Override
+    public boolean isShieldBlocking() {
+        return getBoolean("shield-blocking", true);
+    }
+
+    @Override
+    public boolean isHologramPatch() {
+        return getBoolean("hologram-patch", false);
+    }
+
+    @Override
+    public boolean isBossbarPatch() {
+        return getBoolean("bossbar-patch", true);
+    }
+
+    @Override
+    public boolean isBossbarAntiflicker() {
+        return getBoolean("bossbar-anti-flicker", false);
+    }
+
+    @Override
+    public boolean isUnknownEntitiesSuppressed() {
+        return false;
+    }
+
+    @Override
+    public double getHologramYOffset() {
+        return getDouble("hologram-y", -0.96D);
+    }
+
+    @Override
+    public boolean isBlockBreakPatch() {
+        return false;
+    }
+
+    @Override
+    public int getMaxPPS() {
+        return getInt("max-pps", 800);
+    }
+
+    @Override
+    public String getMaxPPSKickMessage() {
+        return getString("max-pps-kick-msg", "Sending packets too fast? lag?");
+    }
+
+    @Override
+    public int getTrackingPeriod() {
+        return getInt("tracking-period", 6);
+    }
+
+    @Override
+    public int getWarningPPS() {
+        return getInt("tracking-warning-pps", 120);
+    }
+
+    @Override
+    public int getMaxWarnings() {
+        return getInt("tracking-max-warnings", 3);
+    }
+
+    @Override
+    public String getMaxWarningsKickMessage() {
+        return getString("tracking-max-kick-msg", "You are sending too many packets, :(");
+    }
+
+    @Override
+    public boolean isAntiXRay() {
+        return getBoolean("anti-xray-patch", true);
+    }
+
+    @Override
+    public boolean isSendSupportedVersions() {
+        return getBoolean("send-supported-versions", false);
+    }
+
+    @Override
+    public boolean isStimulatePlayerTick() {
+        return getBoolean("simulate-pt", true);
+    }
+
+    @Override
+    public boolean isItemCache() {
+        return getBoolean("item-cache", true);
+    }
+
+    @Override
+    public boolean isNMSPlayerTicking() {
+        return getBoolean("nms-player-ticking", true);
+    }
+
+    @Override
+    public boolean isReplacePistons() {
+        return getBoolean("replace-pistons", false);
+    }
+
+    @Override
+    public int getPistonReplacementId() {
+        return getInt("replacement-piston-id", 0);
+    }
+
+    public boolean isAutoTeam() {
+        // Collision has to be enabled first
+        return isPreventCollision() && getBoolean("auto-team", true);
+    }
+
+    @Override
+    public boolean isForceJsonTransform() {
+        return getBoolean("force-json-transform", false);
+    }
+
+    @Override
+    public List<Integer> getBlockedProtocols() {
+        return getIntegerList("block-protocols");
+    }
+
+    @Override
+    public String getBlockedDisconnectMsg() {
+        return getString("block-disconnect-msg", "You are using an unsupported Minecraft version!");
+    }
+
+    @Override
+    public String getReloadDisconnectMsg() {
+        return getString("reload-disconnect-msg", "Server reload, please rejoin!");
+    }
+
+    @Override
+    protected void handleConfig(Map<String, Object> config) {
+        // Nothing currently
+    }
+
+    @Override
+    public List<String> getUnsupportedOptions() {
+        return UNSUPPORTED;
+    }
+}

bukkit/src/main/java/us/myles/ViaVersion/bukkit/platform/BukkitTaskId.java

@@ -0,0 +1,11 @@
+package us.myles.ViaVersion.bukkit.platform;
+
+import lombok.AllArgsConstructor;
+import lombok.Getter;
+import us.myles.ViaVersion.api.platform.TaskId;
+
+@Getter
+@AllArgsConstructor
+public class BukkitTaskId implements TaskId {
+    private Integer object;
+}

bukkit/src/main/java/us/myles/ViaVersion/bukkit/platform/BukkitViaAPI.java

@@ -0,0 +1,127 @@
+package us.myles.ViaVersion.bukkit.platform;
+
+import io.netty.buffer.ByteBuf;
+import lombok.AllArgsConstructor;
+import lombok.NonNull;
+import org.bukkit.Bukkit;
+import org.bukkit.entity.Player;
+import us.myles.ViaVersion.ViaVersionPlugin;
+import us.myles.ViaVersion.api.Via;
+import us.myles.ViaVersion.api.ViaAPI;
+import us.myles.ViaVersion.api.ViaVersionAPI;
+import us.myles.ViaVersion.api.boss.BossBar;
+import us.myles.ViaVersion.api.boss.BossColor;
+import us.myles.ViaVersion.api.boss.BossStyle;
+import us.myles.ViaVersion.api.command.ViaVersionCommand;
+import us.myles.ViaVersion.api.data.UserConnection;
+import us.myles.ViaVersion.api.protocol.ProtocolRegistry;
+import us.myles.ViaVersion.boss.ViaBossBar;
+import us.myles.ViaVersion.bukkit.util.ProtocolSupportUtil;
+import us.myles.ViaVersion.protocols.base.ProtocolInfo;
+
+import java.util.Map;
+import java.util.SortedSet;
+import java.util.TreeSet;
+import java.util.UUID;
+
+@AllArgsConstructor
+public class BukkitViaAPI implements ViaAPI<Player>, ViaVersionAPI {
+    private ViaVersionPlugin plugin;
+
+    @Override
+    public int getPlayerVersion(@NonNull Player player) {
+        if (!isPorted(player))
+            return getExternalVersion(player);
+        return getPortedPlayers().get(player.getUniqueId()).get(ProtocolInfo.class).getProtocolVersion();
+    }
+
+    @Override
+    public int getPlayerVersion(@NonNull UUID uuid) {
+        if (!isPorted(uuid))
+            return getExternalVersion(Bukkit.getPlayer(uuid));
+        return getPortedPlayers().get(uuid).get(ProtocolInfo.class).getProtocolVersion();
+    }
+
+    private int getExternalVersion(Player player) {
+        if (!isProtocolSupport()) {
+            return ProtocolRegistry.SERVER_PROTOCOL;
+        } else {
+            return ProtocolSupportUtil.getProtocolVersion(player);
+        }
+    }
+
+    @Override
+    public boolean isPorted(Player player) {
+        return isPorted(player.getUniqueId());
+    }
+
+    @Override
+    public boolean isPorted(UUID playerUUID) {
+        return getPortedPlayers().containsKey(playerUUID);
+    }
+
+    @Override
+    public String getVersion() {
+        return plugin.getDescription().getVersion();
+    }
+
+    @Override
+    public void sendRawPacket(UUID uuid, ByteBuf packet) throws IllegalArgumentException {
+        if (!isPorted(uuid)) throw new IllegalArgumentException("This player is not controlled by ViaVersion!");
+        UserConnection ci = getPortedPlayers().get(uuid);
+        ci.sendRawPacket(packet);
+    }
+
+    @Override
+    public void sendRawPacket(Player player, ByteBuf packet) throws IllegalArgumentException {
+        sendRawPacket(player.getUniqueId(), packet);
+    }
+
+    @Override
+    public BossBar createBossBar(String title, BossColor color, BossStyle style) {
+        return new ViaBossBar(title, 1F, color, style);
+    }
+
+    @Override
+    public BossBar createBossBar(String title, float health, BossColor color, BossStyle style) {
+        return new ViaBossBar(title, health, color, style);
+    }
+
+    @Override
+    public boolean isDebug() {
+        return Via.getManager().isDebug();
+    }
+
+    @Override
+    public ViaVersionCommand getCommandHandler() {
+        return Via.getManager().getCommandHandler();
+    }
+
+    @Override
+    public SortedSet<Integer> getSupportedVersions() {
+        SortedSet<Integer> outputSet = new TreeSet<>(ProtocolRegistry.getSupportedVersions());
+        outputSet.removeAll(Via.getPlatform().getConf().getBlockedProtocols());
+
+        return outputSet;
+    }
+
+    @Override
+    public boolean isCompatSpigotBuild() {
+        return plugin.isCompatSpigotBuild();
+    }
+
+
+    @Override
+    public boolean isSpigot() {
+        return plugin.isSpigot();
+    }
+
+    @Override
+    public boolean isProtocolSupport() {
+        return plugin.isProtocolSupport();
+    }
+
+    public Map<UUID, UserConnection> getPortedPlayers() {
+        return Via.getManager().getPortedPlayers();
+    }
+}

bukkit/src/main/java/us/myles/ViaVersion/bukkit/platform/BukkitViaInjector.java

@@ -0,0 +1,280 @@
+package us.myles.ViaVersion.bukkit.platform;
+
+import io.netty.channel.ChannelFuture;
+import io.netty.channel.ChannelHandler;
+import io.netty.channel.ChannelInitializer;
+import io.netty.channel.socket.SocketChannel;
+import org.bukkit.plugin.PluginDescriptionFile;
+import us.myles.ViaVersion.api.Pair;
+import us.myles.ViaVersion.api.Via;
+import us.myles.ViaVersion.api.platform.ViaInjector;
+import us.myles.ViaVersion.bukkit.handlers.BukkitChannelInitializer;
+import us.myles.ViaVersion.bukkit.util.NMSUtil;
+import us.myles.ViaVersion.util.ConcurrentList;
+import us.myles.ViaVersion.util.ListWrapper;
+import us.myles.ViaVersion.util.ReflectionUtil;
+
+import java.lang.reflect.Field;
+import java.lang.reflect.Method;
+import java.util.ArrayList;
+import java.util.List;
+
+public class BukkitViaInjector implements ViaInjector {
+    private List<ChannelFuture> injectedFutures = new ArrayList<>();
+    private List<Pair<Field, Object>> injectedLists = new ArrayList<>();
+
+    @Override
+    public void inject() throws Exception {
+        try {
+            Object connection = getServerConnection();
+            if (connection == null) {
+                throw new Exception("We failed to find the core component 'ServerConnection', please file an issue on our GitHub.");
+            }
+            for (Field field : connection.getClass().getDeclaredFields()) {
+                field.setAccessible(true);
+                final Object value = field.get(connection);
+                if (value instanceof List) {
+                    // Inject the list
+                    List wrapper = new ListWrapper((List) value) {
+                        @Override
+                        public synchronized void handleAdd(Object o) {
+                            synchronized (this) {
+                                if (o instanceof ChannelFuture) {
+                                    try {
+                                        injectChannelFuture((ChannelFuture) o);
+                                    } catch (Exception e) {
+                                        e.printStackTrace();
+                                    }
+                                }
+                            }
+                        }
+                    };
+                    injectedLists.add(new Pair<>(field, connection));
+                    field.set(connection, wrapper);
+                    // Iterate through current list
+                    synchronized (wrapper) {
+                        for (Object o : (List) value) {
+                            if (o instanceof ChannelFuture) {
+                                injectChannelFuture((ChannelFuture) o);
+                            } else {
+                                break; // not the right list.
+                            }
+                        }
+                    }
+                }
+            }
+
+        } catch (Exception e) {
+            Via.getPlatform().getLogger().severe("Unable to inject ViaVersion, please post these details on our GitHub and ensure you're using a compatible server version.");
+            throw e;
+        }
+    }
+
+    private void injectChannelFuture(ChannelFuture future) throws Exception {
+        try {
+            List<String> names = future.channel().pipeline().names();
+            ChannelHandler bootstrapAcceptor = null;
+            // Pick best
+            for (String name : names) {
+                ChannelHandler handler = future.channel().pipeline().get(name);
+                try {
+                    ReflectionUtil.get(handler, "childHandler", ChannelInitializer.class);
+                    bootstrapAcceptor = handler;
+                } catch (Exception e) {
+                    // Not this one
+                }
+            }
+            // Default to first (Also allows blame to work)
+            if (bootstrapAcceptor == null) {
+                bootstrapAcceptor = future.channel().pipeline().first();
+            }
+            try {
+                ChannelInitializer<SocketChannel> oldInit = ReflectionUtil.get(bootstrapAcceptor, "childHandler", ChannelInitializer.class);
+                ChannelInitializer newInit = new BukkitChannelInitializer(oldInit);
+
+                ReflectionUtil.set(bootstrapAcceptor, "childHandler", newInit);
+                injectedFutures.add(future);
+            } catch (NoSuchFieldException e) {
+                // let's find who to blame!
+                ClassLoader cl = bootstrapAcceptor.getClass().getClassLoader();
+                if (cl.getClass().getName().equals("org.bukkit.plugin.java.PluginClassLoader")) {
+                    PluginDescriptionFile yaml = ReflectionUtil.get(cl, "description", PluginDescriptionFile.class);
+                    throw new Exception("Unable to inject, due to " + bootstrapAcceptor.getClass().getName() + ", try without the plugin " + yaml.getName() + "?");
+                } else {
+                    throw new Exception("Unable to find core component 'childHandler', please check your plugins. issue: " + bootstrapAcceptor.getClass().getName());
+                }
+
+            }
+        } catch (Exception e) {
+            Via.getPlatform().getLogger().severe("We failed to inject ViaVersion, have you got late-bind enabled with something else?");
+            throw e;
+        }
+    }
+
+    @Override
+    public void uninject() {
+        // TODO: Uninject from players currently online to prevent protocol lib issues.
+        for (ChannelFuture future : injectedFutures) {
+            List<String> names = future.channel().pipeline().names();
+            ChannelHandler bootstrapAcceptor = null;
+            // Pick best
+            for (String name : names) {
+                ChannelHandler handler = future.channel().pipeline().get(name);
+                try {
+                    ChannelInitializer<SocketChannel> oldInit = ReflectionUtil.get(handler, "childHandler", ChannelInitializer.class);
+                    if (oldInit instanceof BukkitChannelInitializer) {
+                        bootstrapAcceptor = handler;
+                    }
+                } catch (Exception e) {
+                    // Not this one
+                }
+            }
+            // Default to first
+            if (bootstrapAcceptor == null) {
+                bootstrapAcceptor = future.channel().pipeline().first();
+            }
+
+            try {
+                ChannelInitializer<SocketChannel> oldInit = ReflectionUtil.get(bootstrapAcceptor, "childHandler", ChannelInitializer.class);
+                if (oldInit instanceof BukkitChannelInitializer) {
+                    ReflectionUtil.set(bootstrapAcceptor, "childHandler", ((BukkitChannelInitializer) oldInit).getOriginal());
+                }
+            } catch (Exception e) {
+                Via.getPlatform().getLogger().severe("Failed to remove injection handler, reload won't work with connections, please reboot!");
+            }
+        }
+        injectedFutures.clear();
+
+        for (Pair<Field, Object> pair : injectedLists) {
+            try {
+                Object o = pair.getKey().get(pair.getValue());
+                if (o instanceof ListWrapper) {
+                    pair.getKey().set(pair.getValue(), ((ListWrapper) o).getOriginalList());
+                }
+            } catch (IllegalAccessException e) {
+                Via.getPlatform().getLogger().severe("Failed to remove injection, reload won't work with connections, please reboot!");
+            }
+        }
+
+        injectedLists.clear();
+    }
+
+    @Override
+    public int getServerProtocolVersion() throws Exception {
+        try {
+            Class<?> serverClazz = NMSUtil.nms("MinecraftServer");
+            Object server = ReflectionUtil.invokeStatic(serverClazz, "getServer");
+            Class<?> pingClazz = NMSUtil.nms("ServerPing");
+            Object ping = null;
+            // Search for ping method
+            for (Field f : serverClazz.getDeclaredFields()) {
+                if (f.getType() != null) {
+                    if (f.getType().getSimpleName().equals("ServerPing")) {
+                        f.setAccessible(true);
+                        ping = f.get(server);
+                    }
+                }
+            }
+            if (ping != null) {
+                Object serverData = null;
+                for (Field f : pingClazz.getDeclaredFields()) {
+                    if (f.getType() != null) {
+                        if (f.getType().getSimpleName().endsWith("ServerData")) {
+                            f.setAccessible(true);
+                            serverData = f.get(ping);
+                        }
+                    }
+                }
+                if (serverData != null) {
+                    int protocolVersion = -1;
+                    for (Field f : serverData.getClass().getDeclaredFields()) {
+                        if (f.getType() != null) {
+                            if (f.getType() == int.class) {
+                                f.setAccessible(true);
+                                protocolVersion = (int) f.get(serverData);
+                            }
+                        }
+                    }
+                    if (protocolVersion != -1) {
+                        return protocolVersion;
+                    }
+                }
+            }
+        } catch (Exception e) {
+            throw new Exception("Failed to get server", e);
+        }
+        throw new Exception("Failed to get server");
+    }
+
+    @Override
+    public String getEncoderName() {
+        return "encoder";
+    }
+
+    @Override
+    public String getDecoderName() {
+        return "decoder";
+    }
+
+    public static Object getServerConnection() throws Exception {
+        Class<?> serverClazz = NMSUtil.nms("MinecraftServer");
+        Object server = ReflectionUtil.invokeStatic(serverClazz, "getServer");
+        Object connection = null;
+        for (Method m : serverClazz.getDeclaredMethods()) {
+            if (m.getReturnType() != null) {
+                if (m.getReturnType().getSimpleName().equals("ServerConnection")) {
+                    if (m.getParameterTypes().length == 0) {
+                        connection = m.invoke(server);
+                    }
+                }
+            }
+        }
+        return connection;
+    }
+
+    public static void patchLists() throws Exception {
+        Object connection = getServerConnection();
+        if (connection == null) {
+            Via.getPlatform().getLogger().warning("We failed to find the core component 'ServerConnection', please file an issue on our GitHub.");
+            return;
+        }
+        for (Field field : connection.getClass().getDeclaredFields()) {
+            field.setAccessible(true);
+            final Object value = field.get(connection);
+            if (value instanceof List) {
+                if (!(value instanceof ConcurrentList)) {
+                    ConcurrentList list = new ConcurrentList();
+                    list.addAll((List) value);
+                    field.set(connection, list);
+                }
+            }
+        }
+    }
+
+    public static boolean isBinded() {
+        try {
+            Object connection = getServerConnection();
+            if (connection == null) {
+                return false;
+            }
+            for (Field field : connection.getClass().getDeclaredFields()) {
+                field.setAccessible(true);
+                final Object value = field.get(connection);
+                if (value instanceof List) {
+                    // Inject the list
+                    synchronized (value) {
+                        for (Object o : (List) value) {
+                            if (o instanceof ChannelFuture) {
+                                return true;
+                            } else {
+                                break; // not the right list.
+                            }
+                        }
+                    }
+                }
+            }
+        } catch (Exception e) {
+        }
+        return false;
+    }
+}

bukkit/src/main/java/us/myles/ViaVersion/bukkit/platform/BukkitViaLoader.java

@@ -0,0 +1,91 @@
+package us.myles.ViaVersion.bukkit.platform;
+
+import lombok.AllArgsConstructor;
+import org.bukkit.Bukkit;
+import org.bukkit.event.EventHandler;
+import org.bukkit.event.Listener;
+import org.bukkit.event.player.PlayerQuitEvent;
+import us.myles.ViaVersion.ViaVersionPlugin;
+import us.myles.ViaVersion.api.Via;
+import us.myles.ViaVersion.api.data.UserConnection;
+import us.myles.ViaVersion.api.minecraft.item.Item;
+import us.myles.ViaVersion.api.platform.ViaPlatformLoader;
+import us.myles.ViaVersion.bukkit.listeners.UpdateListener;
+import us.myles.ViaVersion.bukkit.listeners.protocol1_9to1_8.*;
+import us.myles.ViaVersion.bukkit.providers.BukkitViaBulkChunkTranslator;
+import us.myles.ViaVersion.bukkit.providers.BukkitViaMovementTransmitter;
+import us.myles.ViaVersion.protocols.base.ProtocolInfo;
+import us.myles.ViaVersion.protocols.protocol1_9to1_8.providers.BulkChunkTranslatorProvider;
+import us.myles.ViaVersion.protocols.protocol1_9to1_8.providers.HandItemProvider;
+import us.myles.ViaVersion.protocols.protocol1_9to1_8.providers.MovementTransmitterProvider;
+
+import java.util.UUID;
+import java.util.concurrent.Callable;
+import java.util.concurrent.TimeUnit;
+
+@AllArgsConstructor
+public class BukkitViaLoader implements ViaPlatformLoader {
+    private ViaVersionPlugin plugin;
+
+    @Override
+    public void load() {
+        // Update Listener
+        Bukkit.getPluginManager().registerEvents(new UpdateListener(), plugin);
+
+        /* Base Protocol */
+        final ViaVersionPlugin plugin = (ViaVersionPlugin) Bukkit.getPluginManager().getPlugin("ViaVersion");
+
+        Bukkit.getPluginManager().registerEvents(new Listener() {
+            @EventHandler
+            public void onPlayerQuit(PlayerQuitEvent e) {
+                Via.getManager().removePortedClient(e.getPlayer().getUniqueId());
+            }
+        }, plugin);
+
+        /* 1.9 client to 1.8 server */
+
+        new ArmorListener(plugin).register();
+        new DeathListener(plugin).register();
+        new BlockListener(plugin).register();
+
+        if (Bukkit.getVersion().toLowerCase().contains("paper") || Bukkit.getVersion().toLowerCase().contains("taco")) {
+            plugin.getLogger().info("Enabling PaperSpigot/TacoSpigot patch: Fixes block placement.");
+            new PaperPatch(plugin).register();
+        }
+        if (plugin.getConf().isItemCache()) {
+            new HandItemCache().runTaskTimerAsynchronously(plugin, 2L, 2L); // Updates player's items :)
+            HandItemCache.CACHE = true;
+        }
+
+        /* Providers */
+        Via.getManager().getProviders().use(BulkChunkTranslatorProvider.class, new BukkitViaBulkChunkTranslator());
+        Via.getManager().getProviders().use(MovementTransmitterProvider.class, new BukkitViaMovementTransmitter());
+        Via.getManager().getProviders().use(HandItemProvider.class, new HandItemProvider() {
+            @Override
+            public Item getHandItem(final UserConnection info) {
+                if (HandItemCache.CACHE) {
+                    return HandItemCache.getHandItem(info.get(ProtocolInfo.class).getUuid());
+                } else {
+                    try {
+                        return Bukkit.getScheduler().callSyncMethod(Bukkit.getPluginManager().getPlugin("ViaVersion"), new Callable<Item>() {
+                            @Override
+                            public Item call() throws Exception {
+                                UUID playerUUID = info.get(ProtocolInfo.class).getUuid();
+                                if (Bukkit.getPlayer(playerUUID) != null) {
+                                    return HandItemCache.convert(Bukkit.getPlayer(playerUUID).getItemInHand());
+                                }
+                                return null;
+                            }
+                        }).get(10, TimeUnit.SECONDS);
+                    } catch (Exception e) {
+                        Via.getPlatform().getLogger().severe("Error fetching hand item: " + e.getClass().getName());
+                        if (Via.getManager().isDebug())
+                            e.printStackTrace();
+                        return null;
+                    }
+                }
+            }
+        });
+
+    }
+}

bukkit/src/main/java/us/myles/ViaVersion/bukkit/providers/BukkitViaBulkChunkTranslator.java

@@ -0,0 +1,87 @@
+package us.myles.ViaVersion.bukkit.providers;
+
+import com.google.common.collect.Lists;
+import us.myles.ViaVersion.ViaVersionPlugin;
+import us.myles.ViaVersion.api.Via;
+import us.myles.ViaVersion.bukkit.util.NMSUtil;
+import us.myles.ViaVersion.protocols.protocol1_9to1_8.providers.BulkChunkTranslatorProvider;
+import us.myles.ViaVersion.protocols.protocol1_9to1_8.storage.ClientChunks;
+import us.myles.ViaVersion.util.ReflectionUtil;
+
+import java.lang.reflect.Method;
+import java.util.List;
+import java.util.logging.Level;
+
+public class BukkitViaBulkChunkTranslator extends BulkChunkTranslatorProvider {
+    // Reflection
+    private static ReflectionUtil.ClassReflection mapChunkBulkRef;
+    private static ReflectionUtil.ClassReflection mapChunkRef;
+    private static Method obfuscateRef;
+
+    static {
+        try {
+            mapChunkBulkRef = new ReflectionUtil.ClassReflection(NMSUtil.nms("PacketPlayOutMapChunkBulk"));
+            mapChunkRef = new ReflectionUtil.ClassReflection(NMSUtil.nms("PacketPlayOutMapChunk"));
+            if (((ViaVersionPlugin) Via.getPlatform()).isSpigot()) {
+                obfuscateRef = Class.forName("org.spigotmc.AntiXray").getMethod("obfuscate", int.class, int.class, int.class, byte[].class, NMSUtil.nms("World"));
+            }
+        } catch (ClassNotFoundException e) {
+            // Ignore as server is probably 1.9+
+        } catch (Exception e) {
+            Via.getPlatform().getLogger().log(Level.WARNING, "Failed to initialise chunks reflection", e);
+        }
+    }
+
+    @Override
+    public List<Object> transformMapChunkBulk(Object packet, ClientChunks clientChunks) {
+        List<Object> list = Lists.newArrayList();
+        try {
+            int[] xcoords = mapChunkBulkRef.getFieldValue("a", packet, int[].class);
+            int[] zcoords = mapChunkBulkRef.getFieldValue("b", packet, int[].class);
+            Object[] chunkMaps = mapChunkBulkRef.getFieldValue("c", packet, Object[].class);
+
+            if (Via.getConfig().isAntiXRay() && ((ViaVersionPlugin) Via.getPlatform()).isSpigot()) { //Spigot anti-xray patch
+                try {
+                    Object world = mapChunkBulkRef.getFieldValue("world", packet, Object.class);
+                    Object spigotConfig = ReflectionUtil.getPublic(world, "spigotConfig", Object.class);
+                    Object antiXrayInstance = ReflectionUtil.getPublic(spigotConfig, "antiXrayInstance", Object.class);
+
+                    for (int i = 0; i < xcoords.length; ++i) {
+                        // TODO: Possibly optimise this
+                        Object b = ReflectionUtil.get(chunkMaps[i], "b", Object.class);
+                        Object a = ReflectionUtil.get(chunkMaps[i], "a", Object.class);
+
+                        obfuscateRef.invoke(antiXrayInstance, xcoords[i], zcoords[i], b, a, world);
+                    }
+                } catch (Exception e) {
+                    // not spigot, or it failed.
+                }
+            }
+            for (int i = 0; i < chunkMaps.length; i++) {
+                int x = xcoords[i];
+                int z = zcoords[i];
+                Object chunkMap = chunkMaps[i];
+                Object chunkPacket = mapChunkRef.newInstance();
+                mapChunkRef.setFieldValue("a", chunkPacket, x);
+                mapChunkRef.setFieldValue("b", chunkPacket, z);
+                mapChunkRef.setFieldValue("c", chunkPacket, chunkMap);
+                mapChunkRef.setFieldValue("d", chunkPacket, true); // Chunk bulk chunks are always ground-up
+                clientChunks.getBulkChunks().add(ClientChunks.toLong(x, z)); // Store for later
+                list.add(chunkPacket);
+            }
+        } catch (Exception e) {
+            Via.getPlatform().getLogger().log(Level.WARNING, "Failed to transform chunks bulk", e);
+        }
+        return list;
+    }
+
+    @Override
+    public boolean isFiltered(Class<?> packetClass) {
+        return packetClass.getName().endsWith("PacketPlayOutMapChunkBulk");
+    }
+
+    @Override
+    public boolean isPacketLevel() {
+        return false;
+    }
+}

bukkit/src/main/java/us/myles/ViaVersion/bukkit/providers/BukkitViaMovementTransmitter.java

@@ -0,0 +1,103 @@
+package us.myles.ViaVersion.bukkit.providers;
+
+import org.bukkit.Bukkit;
+import org.bukkit.entity.Player;
+import us.myles.ViaVersion.api.Via;
+import us.myles.ViaVersion.api.data.UserConnection;
+import us.myles.ViaVersion.bukkit.util.NMSUtil;
+import us.myles.ViaVersion.protocols.base.ProtocolInfo;
+import us.myles.ViaVersion.protocols.protocol1_9to1_8.providers.MovementTransmitterProvider;
+import us.myles.ViaVersion.protocols.protocol1_9to1_8.storage.MovementTracker;
+
+import java.lang.reflect.Field;
+import java.lang.reflect.InvocationTargetException;
+import java.lang.reflect.Method;
+
+public class BukkitViaMovementTransmitter extends MovementTransmitterProvider {
+    private static boolean USE_NMS = true;
+    // Used for packet mode
+    private Object idlePacket;
+    private Object idlePacket2;
+    // Use for nms
+    private Method getHandle;
+    private Field connection;
+    private Method handleFlying;
+
+    public BukkitViaMovementTransmitter() {
+        USE_NMS = Via.getConfig().isNMSPlayerTicking();
+
+        Class<?> idlePacketClass;
+        try {
+            idlePacketClass = NMSUtil.nms("PacketPlayInFlying");
+        } catch (ClassNotFoundException e) {
+            return; // We'll hope this is 1.9.4+
+        }
+        try {
+            idlePacket = idlePacketClass.newInstance();
+            idlePacket2 = idlePacketClass.newInstance();
+
+            Field flying = idlePacketClass.getDeclaredField("f");
+            flying.setAccessible(true);
+
+            flying.set(idlePacket2, true);
+        } catch (NoSuchFieldException | InstantiationException | IllegalArgumentException | IllegalAccessException e) {
+            throw new RuntimeException("Couldn't make player idle packet, help!", e);
+        }
+        if (USE_NMS) {
+            try {
+                getHandle = NMSUtil.obc("entity.CraftPlayer").getDeclaredMethod("getHandle");
+            } catch (NoSuchMethodException | ClassNotFoundException e) {
+                throw new RuntimeException("Couldn't find CraftPlayer", e);
+            }
+
+            try {
+                connection = NMSUtil.nms("EntityPlayer").getDeclaredField("playerConnection");
+            } catch (NoSuchFieldException | ClassNotFoundException e) {
+                throw new RuntimeException("Couldn't find Player Connection", e);
+            }
+
+            try {
+                handleFlying = NMSUtil.nms("PlayerConnection").getDeclaredMethod("a", idlePacketClass);
+            } catch (NoSuchMethodException | ClassNotFoundException e) {
+                throw new RuntimeException("Couldn't find CraftPlayer", e);
+            }
+        }
+    }
+
+    @Override
+    public Object getFlyingPacket() {
+        if (idlePacket == null)
+            throw new NullPointerException("Could not locate flying packet");
+        return idlePacket2;
+    }
+
+    @Override
+    public Object getGroundPacket() {
+        if (idlePacket == null)
+            throw new NullPointerException("Could not locate flying packet");
+        return idlePacket;
+    }
+
+    @Override
+    public void sendPlayer(UserConnection info) {
+        if (USE_NMS) {
+            Player player = Bukkit.getPlayer(info.get(ProtocolInfo.class).getUuid());
+            if (player != null) {
+                try {
+                    // Tick player
+                    Object entityPlayer = getHandle.invoke(player);
+                    Object pc = connection.get(entityPlayer);
+                    if (pc != null) {
+                        handleFlying.invoke(pc, (info.get(MovementTracker.class).isGround() ? idlePacket2 : idlePacket));
+                        // Tick world
+                        info.get(MovementTracker.class).incrementIdlePacket();
+                    }
+                } catch (IllegalAccessException | InvocationTargetException e) {
+                    e.printStackTrace();
+                }
+            }
+        } else {
+            super.sendPlayer(info);
+        }
+    }
+}

bukkit/src/main/java/us/myles/ViaVersion/bukkit/util/NMSUtil.java

@@ -0,0 +1,20 @@
+package us.myles.ViaVersion.bukkit.util;
+
+import org.bukkit.Bukkit;
+
+public class NMSUtil {
+    private static String BASE = Bukkit.getServer().getClass().getPackage().getName();
+    private static String NMS = BASE.replace("org.bukkit.craftbukkit", "net.minecraft.server");
+
+    public static Class<?> nms(String className) throws ClassNotFoundException {
+        return Class.forName(NMS + "." + className);
+    }
+
+    public static Class<?> obc(String className) throws ClassNotFoundException {
+        return Class.forName(BASE + "." + className);
+    }
+
+    public static String getVersion() {
+        return BASE.substring(BASE.lastIndexOf('.') + 1);
+    }
+}

bukkit/src/main/java/us/myles/ViaVersion/bukkit/util/ProtocolSupportUtil.java

@@ -0,0 +1,33 @@
+package us.myles.ViaVersion.bukkit.util;
+
+import org.bukkit.entity.Player;
+
+import java.lang.reflect.InvocationTargetException;
+import java.lang.reflect.Method;
+
+public class ProtocolSupportUtil {
+    private static Method protocolVersionMethod = null;
+    private static Method getIdMethod = null;
+
+    static {
+        try {
+            protocolVersionMethod = Class.forName("protocolsupport.api.ProtocolSupportAPI").getMethod("getProtocolVersion", Player.class);
+            getIdMethod = Class.forName("protocolsupport.api.ProtocolVersion").getMethod("getId");
+        } catch (Exception e) {
+            // ProtocolSupport not installed.
+        }
+    }
+
+    public static int getProtocolVersion(Player player) {
+        if (protocolVersionMethod == null) return -1;
+        try {
+            Object version = protocolVersionMethod.invoke(null, player);
+            return (int) getIdMethod.invoke(version);
+        } catch (IllegalAccessException e) {
+            e.printStackTrace();
+        } catch (InvocationTargetException e) {
+            e.printStackTrace();
+        }
+        return -1;
+    }
+}

bukkit/src/main/resources/plugin.yml

@@ -0,0 +1,12 @@
+name: ViaVersion
+main: us.myles.ViaVersion.ViaVersionPlugin
+authors: [_MylesC, Matsv]
+version: ${project.version}
+description: ${project.description}
+load: postworld
+loadbefore: [ProtocolLib, ProxyPipe, SpigotLib, SkinRestorer]
+softdepend: [ProtocolSupport, PacketListenerApi]
+commands:
+  viaversion:
+    description: Shows ViaVersion Version and more.
+    aliases: [viaver, vvbukkit]

bungee/pom.xml

@@ -0,0 +1,43 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project xmlns="http://maven.apache.org/POM/4.0.0"
+         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+    <parent>
+        <artifactId>viaversion-parent</artifactId>
+        <groupId>us.myles</groupId>
+        <version>1.0.0</version>
+    </parent>
+    <modelVersion>4.0.0</modelVersion>
+
+    <artifactId>viaversion-bungee</artifactId>
+
+    <build>
+        <resources>
+            <resource>
+                <targetPath>.</targetPath>
+                <filtering>true</filtering>
+                <directory>src/main/resources/</directory>
+                <includes>
+                    <include>*</include>
+                </includes>
+            </resource>
+        </resources>
+    </build>
+
+    <dependencies>
+        <!-- BungeeCord API -->
+        <dependency>
+            <groupId>net.md-5</groupId>
+            <artifactId>bungeecord-api</artifactId>
+            <version>1.10-SNAPSHOT</version>
+            <scope>provided</scope>
+        </dependency>
+
+        <!-- Common Module -->
+        <dependency>
+            <groupId>us.myles</groupId>
+            <artifactId>viaversion-common</artifactId>
+            <version>1.0.0</version>
+        </dependency>
+    </dependencies>
+</project>

bungee/src/main/java/us/myles/ViaVersion/BungeePlugin.java

@@ -0,0 +1,162 @@
+package us.myles.ViaVersion;
+
+import com.google.gson.JsonObject;
+import net.md_5.bungee.api.ProxyServer;
+import net.md_5.bungee.api.chat.TextComponent;
+import net.md_5.bungee.api.connection.ProxiedPlayer;
+import net.md_5.bungee.api.event.PlayerDisconnectEvent;
+import net.md_5.bungee.api.plugin.Listener;
+import net.md_5.bungee.api.plugin.Plugin;
+import net.md_5.bungee.event.EventHandler;
+import us.myles.ViaVersion.api.Via;
+import us.myles.ViaVersion.api.ViaAPI;
+import us.myles.ViaVersion.api.command.ViaCommandSender;
+import us.myles.ViaVersion.api.configuration.ConfigurationProvider;
+import us.myles.ViaVersion.api.platform.TaskId;
+import us.myles.ViaVersion.api.platform.ViaPlatform;
+import us.myles.ViaVersion.bungee.commands.BungeeCommand;
+import us.myles.ViaVersion.bungee.commands.BungeeCommandHandler;
+import us.myles.ViaVersion.bungee.commands.BungeeCommandSender;
+import us.myles.ViaVersion.bungee.platform.*;
+import us.myles.ViaVersion.bungee.service.ProtocolDetectorService;
+import us.myles.ViaVersion.dump.PluginInfo;
+import us.myles.ViaVersion.util.GsonUtil;
+
+import java.util.ArrayList;
+import java.util.Arrays;
+import java.util.List;
+import java.util.UUID;
+import java.util.concurrent.TimeUnit;
+
+public class BungeePlugin extends Plugin implements ViaPlatform, Listener {
+    private BungeeViaAPI api;
+    private BungeeConfigAPI config;
+    private BungeeCommandHandler commandHandler;
+
+    @Override
+    public void onLoad() {
+        api = new BungeeViaAPI();
+        config = new BungeeConfigAPI(getDataFolder());
+        commandHandler = new BungeeCommandHandler();
+        ProxyServer.getInstance().getPluginManager().registerCommand(this, new BungeeCommand(commandHandler));
+        // Init platform
+        Via.init(ViaManager.builder()
+                .platform(this)
+                .injector(new BungeeViaInjector())
+                .loader(new BungeeViaLoader(this))
+                .commandHandler(commandHandler)
+                .build());
+    }
+
+    @Override
+    public void onEnable() {
+        // Inject
+        Via.getManager().init();
+    }
+
+    @Override
+    public String getPlatformName() {
+        return getProxy().getName();
+    }
+
+    @Override
+    public String getPlatformVersion() {
+        return getProxy().getVersion();
+    }
+
+    @Override
+    public String getPluginVersion() {
+        return getDescription().getVersion();
+    }
+
+    @Override
+    public TaskId runAsync(Runnable runnable) {
+        return new BungeeTaskId(getProxy().getScheduler().runAsync(this, runnable).getId());
+    }
+
+    @Override
+    public TaskId runSync(Runnable runnable) {
+        return runAsync(runnable);
+    }
+
+    @Override
+    public TaskId runRepeatingSync(Runnable runnable, Long ticks) {
+        return new BungeeTaskId(getProxy().getScheduler().schedule(this, runnable, 0, ticks * 50, TimeUnit.MILLISECONDS).getId());
+    }
+
+    @Override
+    public void cancelTask(TaskId taskId) {
+        if (taskId == null) return;
+        if (taskId.getObject() == null) return;
+        if (taskId instanceof BungeeTaskId) {
+            getProxy().getScheduler().cancel((Integer) taskId.getObject());
+        }
+    }
+
+    @Override
+    public ViaCommandSender[] getOnlinePlayers() {
+        ViaCommandSender[] array = new ViaCommandSender[getProxy().getPlayers().size()];
+        int i = 0;
+        for (ProxiedPlayer player : getProxy().getPlayers()) {
+            array[i++] = new BungeeCommandSender(player);
+        }
+        return array;
+    }
+
+    @Override
+    public void sendMessage(UUID uuid, String message) {
+        getProxy().getPlayer(uuid).sendMessage(TextComponent.fromLegacyText(message));
+    }
+
+    @Override
+    public boolean kickPlayer(UUID uuid, String message) {
+        if (getProxy().getPlayer(uuid) != null) {
+            getProxy().getPlayer(uuid).disconnect(TextComponent.fromLegacyText(message));
+            return true;
+        }
+        return false;
+    }
+
+    @Override
+    public boolean isPluginEnabled() {
+        return true;
+    }
+
+    @Override
+    public ViaAPI getApi() {
+        return api;
+    }
+
+    @Override
+    public BungeeConfigAPI getConf() {
+        return config;
+    }
+
+    @Override
+    public ConfigurationProvider getConfigurationProvider() {
+        return config;
+    }
+
+    @Override
+    public void onReload() {
+        // Injector prints a message <3
+    }
+
+    @Override
+    public JsonObject getDump() {
+        JsonObject platformSpecific = new JsonObject();
+
+        List<PluginInfo> plugins = new ArrayList<>();
+        for (Plugin p : ProxyServer.getInstance().getPluginManager().getPlugins())
+            plugins.add(new PluginInfo(true, p.getDescription().getName(), p.getDescription().getVersion(), p.getDescription().getMain(), Arrays.asList(p.getDescription().getAuthor())));
+
+        platformSpecific.add("plugins", GsonUtil.getGson().toJsonTree(plugins));
+        platformSpecific.add("servers", GsonUtil.getGson().toJsonTree(ProtocolDetectorService.getDetectedIds()));
+        return platformSpecific;
+    }
+
+    @EventHandler
+    public void onQuit(PlayerDisconnectEvent e) {
+        Via.getManager().removePortedClient(e.getPlayer().getUniqueId());
+    }
+}

bungee/src/main/java/us/myles/ViaVersion/bungee/commands/BungeeCommand.java

@@ -0,0 +1,24 @@
+package us.myles.ViaVersion.bungee.commands;
+
+import net.md_5.bungee.api.CommandSender;
+import net.md_5.bungee.api.plugin.Command;
+import net.md_5.bungee.api.plugin.TabExecutor;
+
+public class BungeeCommand extends Command implements TabExecutor {
+    private final BungeeCommandHandler handler;
+
+    public BungeeCommand(BungeeCommandHandler handler) {
+        super("viaversion", "", "viaver", "vvbungee"); // The CommandHandler will handle the permission
+        this.handler = handler;
+    }
+
+    @Override
+    public void execute(CommandSender commandSender, String[] strings) {
+        handler.onCommand(new BungeeCommandSender(commandSender), strings);
+    }
+
+    @Override
+    public Iterable<String> onTabComplete(CommandSender commandSender, String[] strings) {
+        return handler.onTabComplete(new BungeeCommandSender(commandSender), strings);
+    }
+}

bungee/src/main/java/us/myles/ViaVersion/bungee/commands/BungeeCommandHandler.java

@@ -0,0 +1,16 @@
+package us.myles.ViaVersion.bungee.commands;
+
+import us.myles.ViaVersion.api.Via;
+import us.myles.ViaVersion.bungee.commands.subs.ProbeSubCmd;
+import us.myles.ViaVersion.commands.ViaCommandHandler;
+
+public class BungeeCommandHandler extends ViaCommandHandler {
+    public BungeeCommandHandler() {
+        try {
+            registerSubCommand(new ProbeSubCmd());
+        } catch (Exception e) {
+            Via.getPlatform().getLogger().severe("Failed to register Bungee subcommands");
+            e.printStackTrace();
+        }
+    }
+}

bungee/src/main/java/us/myles/ViaVersion/bungee/commands/BungeeCommandSender.java

@@ -0,0 +1,38 @@
+package us.myles.ViaVersion.bungee.commands;
+
+import lombok.AllArgsConstructor;
+import net.md_5.bungee.api.CommandSender;
+import net.md_5.bungee.api.chat.TextComponent;
+import net.md_5.bungee.api.connection.ProxiedPlayer;
+import us.myles.ViaVersion.api.command.ViaCommandSender;
+
+import java.util.UUID;
+
+@AllArgsConstructor
+public class BungeeCommandSender implements ViaCommandSender {
+    private CommandSender sender;
+
+    @Override
+    public boolean hasPermission(String permission) {
+        return sender.hasPermission(permission);
+    }
+
+    @Override
+    public void sendMessage(String msg) {
+        sender.sendMessage(TextComponent.fromLegacyText(msg));
+    }
+
+    @Override
+    public UUID getUUID() {
+        if (sender instanceof ProxiedPlayer) {
+            return ((ProxiedPlayer) sender).getUniqueId();
+        } else {
+            return UUID.fromString(getName());
+        }
+    }
+
+    @Override
+    public String getName() {
+        return sender.getName();
+    }
+}

bungee/src/main/java/us/myles/ViaVersion/bungee/commands/subs/ProbeSubCmd.java

@@ -0,0 +1,28 @@
+package us.myles.ViaVersion.bungee.commands.subs;
+
+import us.myles.ViaVersion.api.Via;
+import us.myles.ViaVersion.api.command.ViaCommandSender;
+import us.myles.ViaVersion.api.command.ViaSubCommand;
+import us.myles.ViaVersion.bungee.platform.BungeeConfigAPI;
+import us.myles.ViaVersion.bungee.service.ProtocolDetectorService;
+
+public class ProbeSubCmd extends ViaSubCommand {
+    @Override
+    public String name() {
+        return "probe";
+    }
+
+    @Override
+    public String description() {
+        return "Forces ViaVersion to scan server protocol versions " +
+                (((BungeeConfigAPI) Via.getConfig()).getBungeePingInterval() == -1 ?
+                        "" : "(Also happens at an interval)");
+    }
+
+    @Override
+    public boolean execute(ViaCommandSender sender, String[] args) {
+        ProtocolDetectorService.getInstance().run();
+        sendMessage(sender, "&6Started searching for protocol versions");
+        return true;
+    }
+}

bungee/src/main/java/us/myles/ViaVersion/bungee/handlers/BungeeChannelInitializer.java

@@ -0,0 +1,41 @@
+package us.myles.ViaVersion.bungee.handlers;
+
+import io.netty.channel.Channel;
+import io.netty.channel.ChannelInitializer;
+import io.netty.channel.socket.SocketChannel;
+import us.myles.ViaVersion.api.data.UserConnection;
+import us.myles.ViaVersion.api.protocol.ProtocolPipeline;
+
+import java.lang.reflect.Method;
+
+public class BungeeChannelInitializer extends ChannelInitializer<SocketChannel> {
+
+    private final ChannelInitializer<Channel> original;
+    private Method method;
+
+    public BungeeChannelInitializer(ChannelInitializer<Channel> oldInit) {
+        this.original = oldInit;
+        try {
+            this.method = ChannelInitializer.class.getDeclaredMethod("initChannel", Channel.class);
+            this.method.setAccessible(true);
+        } catch (NoSuchMethodException e) {
+            e.printStackTrace();
+        }
+    }
+
+    @Override
+    protected void initChannel(SocketChannel socketChannel) throws Exception {
+        UserConnection info = new UserConnection(socketChannel);
+        // init protocol
+        new ProtocolPipeline(info);
+        // Add originals
+        this.method.invoke(this.original, socketChannel);
+        // Add our transformers
+        BungeeEncodeHandler encoder = new BungeeEncodeHandler(info);
+        BungeeDecodeHandler decoder = new BungeeDecodeHandler(info);
+
+        socketChannel.pipeline().addBefore("packet-encoder", "via-encoder", encoder);
+        socketChannel.pipeline().addBefore("packet-decoder", "via-decoder", decoder);
+
+    }
+}

bungee/src/main/java/us/myles/ViaVersion/bungee/handlers/BungeeDecodeHandler.java

@@ -0,0 +1,79 @@
+package us.myles.ViaVersion.bungee.handlers;
+
+import io.netty.buffer.ByteBuf;
+import io.netty.channel.ChannelHandler;
+import io.netty.channel.ChannelHandlerContext;
+import io.netty.handler.codec.MessageToMessageDecoder;
+import us.myles.ViaVersion.api.PacketWrapper;
+import us.myles.ViaVersion.api.data.UserConnection;
+import us.myles.ViaVersion.api.type.Type;
+import us.myles.ViaVersion.exception.CancelException;
+import us.myles.ViaVersion.packets.Direction;
+import us.myles.ViaVersion.protocols.base.ProtocolInfo;
+import us.myles.ViaVersion.util.PipelineUtil;
+
+import java.util.List;
+
+@ChannelHandler.Sharable
+public class BungeeDecodeHandler extends MessageToMessageDecoder<ByteBuf> {
+
+    private final UserConnection info;
+
+    public BungeeDecodeHandler(UserConnection info) {
+        this.info = info;
+    }
+
+    @Override
+    protected void decode(final ChannelHandlerContext ctx, ByteBuf bytebuf, List<Object> out) throws Exception {
+        // use transformers
+        if (bytebuf.readableBytes() > 0) {
+            // Ignore if pending disconnect
+            if (info.isPendingDisconnect()) {
+                return;
+            }
+            // Increment received
+            boolean second = info.incrementReceived();
+            // Check PPS
+            if (second) {
+                if (info.handlePPS())
+                    return;
+            }
+
+            if (info.isActive()) {
+                // Handle ID
+                int id = Type.VAR_INT.read(bytebuf);
+                // Transform
+                ByteBuf newPacket = ctx.alloc().buffer();
+                try {
+                    if (id == PacketWrapper.PASSTHROUGH_ID) {
+                        newPacket.writeBytes(bytebuf);
+                    } else {
+                        PacketWrapper wrapper = new PacketWrapper(id, bytebuf, info);
+                        ProtocolInfo protInfo = info.get(ProtocolInfo.class);
+                        protInfo.getPipeline().transform(Direction.INCOMING, protInfo.getState(), wrapper);
+                        wrapper.writeToBuffer(newPacket);
+                    }
+
+                    bytebuf.clear();
+                    bytebuf = newPacket;
+                } catch (Exception e) {
+                    // Clear Buffer
+                    bytebuf.clear();
+                    // Release Packet, be free!
+                    newPacket.release();
+                    throw e;
+                }
+            } else {
+                bytebuf.retain();
+            }
+
+            out.add(bytebuf);
+        }
+    }
+
+    @Override
+    public void exceptionCaught(ChannelHandlerContext ctx, Throwable cause) throws Exception {
+        if (PipelineUtil.containsCause(cause, CancelException.class)) return;
+        super.exceptionCaught(ctx, cause);
+    }
+}

bungee/src/main/java/us/myles/ViaVersion/bungee/handlers/BungeeEncodeHandler.java

@@ -0,0 +1,82 @@
+package us.myles.ViaVersion.bungee.handlers;
+
+import io.netty.buffer.ByteBuf;
+import io.netty.channel.ChannelHandler;
+import io.netty.channel.ChannelHandlerContext;
+import io.netty.handler.codec.MessageToMessageEncoder;
+import us.myles.ViaVersion.api.PacketWrapper;
+import us.myles.ViaVersion.api.data.UserConnection;
+import us.myles.ViaVersion.api.type.Type;
+import us.myles.ViaVersion.bungee.util.BungeePipelineUtil;
+import us.myles.ViaVersion.exception.CancelException;
+import us.myles.ViaVersion.packets.Direction;
+import us.myles.ViaVersion.protocols.base.ProtocolInfo;
+import us.myles.ViaVersion.util.PipelineUtil;
+
+import java.util.List;
+
+@ChannelHandler.Sharable
+public class BungeeEncodeHandler extends MessageToMessageEncoder<ByteBuf> {
+    private final UserConnection info;
+    private boolean handledCompression = false;
+
+    public BungeeEncodeHandler(UserConnection info) {
+        this.info = info;
+    }
+
+
+    @Override
+    protected void encode(final ChannelHandlerContext ctx, ByteBuf bytebuf, List<Object> out) throws Exception {
+        if (bytebuf.readableBytes() == 0) {
+            throw new CancelException();
+        }
+        boolean needsCompress = false;
+        if (!handledCompression) {
+            if (ctx.pipeline().names().indexOf("compress") > ctx.pipeline().names().indexOf("via-encoder")) {
+                // Need to decompress this packet due to bad order
+                bytebuf = BungeePipelineUtil.decompress(ctx, bytebuf);
+                ChannelHandler encoder = ctx.pipeline().get("via-decoder");
+                ChannelHandler decoder = ctx.pipeline().get("via-encoder");
+                ctx.pipeline().remove(encoder);
+                ctx.pipeline().remove(decoder);
+                ctx.pipeline().addAfter("decompress", "via-decoder", encoder);
+                ctx.pipeline().addAfter("compress", "via-encoder", decoder);
+                needsCompress = true;
+                handledCompression = true;
+            }
+        }
+        // Increment sent
+        info.incrementSent();
+
+        if (info.isActive()) {
+            // Handle ID
+            int id = Type.VAR_INT.read(bytebuf);
+            // Transform
+            ByteBuf oldPacket = bytebuf.copy();
+            bytebuf.clear();
+
+            try {
+                PacketWrapper wrapper = new PacketWrapper(id, oldPacket, info);
+                ProtocolInfo protInfo = info.get(ProtocolInfo.class);
+                protInfo.getPipeline().transform(Direction.OUTGOING, protInfo.getState(), wrapper);
+                wrapper.writeToBuffer(bytebuf);
+            } catch (Exception e) {
+                bytebuf.clear();
+                throw e;
+            } finally {
+                oldPacket.release();
+            }
+        }
+
+        if (needsCompress) {
+            bytebuf = BungeePipelineUtil.compress(ctx, bytebuf);
+        }
+        out.add(bytebuf.retain());
+    }
+
+    @Override
+    public void exceptionCaught(ChannelHandlerContext ctx, Throwable cause) throws Exception {
+        if (PipelineUtil.containsCause(cause, CancelException.class)) return;
+        super.exceptionCaught(ctx, cause);
+    }
+}

bungee/src/main/java/us/myles/ViaVersion/bungee/handlers/BungeeServerHandler.java

@@ -0,0 +1,126 @@
+package us.myles.ViaVersion.bungee.handlers;
+
+import net.md_5.bungee.api.connection.ProxiedPlayer;
+import net.md_5.bungee.api.event.ServerConnectEvent;
+import net.md_5.bungee.api.event.ServerConnectedEvent;
+import net.md_5.bungee.api.plugin.Listener;
+import net.md_5.bungee.event.EventHandler;
+import us.myles.ViaVersion.api.Pair;
+import us.myles.ViaVersion.api.Via;
+import us.myles.ViaVersion.api.data.UserConnection;
+import us.myles.ViaVersion.api.protocol.Protocol;
+import us.myles.ViaVersion.api.protocol.ProtocolPipeline;
+import us.myles.ViaVersion.api.protocol.ProtocolRegistry;
+import us.myles.ViaVersion.bungee.service.ProtocolDetectorService;
+import us.myles.ViaVersion.bungee.storage.BungeeStorage;
+import us.myles.ViaVersion.protocols.base.ProtocolInfo;
+
+import java.lang.reflect.Field;
+import java.lang.reflect.InvocationTargetException;
+import java.lang.reflect.Method;
+import java.util.List;
+
+public class BungeeServerHandler implements Listener {
+    private static Method getPendingConnection;
+    private static Method getHandshake;
+    private static Method setProtocol;
+    private static Method getEntityMap = null;
+    private static Method setVersion = null;
+    private static Field entityRewrite = null;
+    private static Field channelWrapper = null;
+
+    static {
+        try {
+            getPendingConnection = Class.forName("net.md_5.bungee.UserConnection").getDeclaredMethod("getPendingConnection");
+            getHandshake = Class.forName("net.md_5.bungee.connection.InitialHandler").getDeclaredMethod("getHandshake");
+            setProtocol = Class.forName("net.md_5.bungee.protocol.packet.Handshake").getDeclaredMethod("setProtocolVersion", int.class);
+            getEntityMap = Class.forName("net.md_5.bungee.entitymap.EntityMap").getDeclaredMethod("getEntityMap", int.class);
+            setVersion = Class.forName("net.md_5.bungee.netty.ChannelWrapper").getDeclaredMethod("setVersion", int.class);
+            channelWrapper = Class.forName("net.md_5.bungee.UserConnection").getDeclaredField("ch");
+            channelWrapper.setAccessible(true);
+            entityRewrite = Class.forName("net.md_5.bungee.UserConnection").getDeclaredField("entityRewrite");
+            entityRewrite.setAccessible(true);
+        } catch (Exception e) {
+            e.printStackTrace();
+        }
+    }
+
+    // Set the handshake version every time someone connects to any server
+    @EventHandler
+    public void onServerConnect(ServerConnectEvent e) throws NoSuchFieldException, IllegalAccessException {
+        UserConnection user = Via.getManager().getConnection(e.getPlayer().getUniqueId());
+        if (!user.has(BungeeStorage.class)) {
+            user.put(new BungeeStorage(user, e.getPlayer()));
+        }
+
+        int protocolId = ProtocolDetectorService.getProtocolId(e.getTarget().getName());
+        List<Pair<Integer, Protocol>> protocols = ProtocolRegistry.getProtocolPath(user.get(ProtocolInfo.class).getProtocolVersion(), protocolId);
+
+        // Check if ViaVersion can support that version
+        try {
+            Object pendingConnection = getPendingConnection.invoke(e.getPlayer());
+            Object handshake = getHandshake.invoke(pendingConnection);
+            setProtocol.invoke(handshake, protocols == null ? user.get(ProtocolInfo.class).getProtocolVersion() : protocolId);
+        } catch (InvocationTargetException e1) {
+            e1.printStackTrace();
+        }
+    }
+
+    @EventHandler
+    public void onServerConnected(ServerConnectedEvent e) {
+        try {
+            checkServerChange(e, Via.getManager().getConnection(e.getPlayer().getUniqueId()));
+        } catch (Exception e1) {
+            e1.printStackTrace();
+        }
+    }
+
+    public void checkServerChange(ServerConnectedEvent e, UserConnection user) throws Exception {
+        if (user.has(BungeeStorage.class)) {
+            BungeeStorage storage = user.get(BungeeStorage.class);
+            ProxiedPlayer player = storage.getPlayer();
+
+            if (e.getServer() != null) {
+                if (!e.getServer().getInfo().getName().equals(storage.getCurrentServer())) {
+                    String serverName = e.getServer().getInfo().getName();
+
+                    storage.setCurrentServer(serverName);
+
+                    int protocolId = ProtocolDetectorService.getProtocolId(serverName);
+
+                    UserConnection viaConnection = Via.getManager().getConnection(player.getUniqueId());
+                    ProtocolInfo info = viaConnection.get(ProtocolInfo.class);
+                    // Refresh the pipes
+                    List<Pair<Integer, Protocol>> protocols = ProtocolRegistry.getProtocolPath(info.getProtocolVersion(), protocolId);
+                    ProtocolPipeline pipeline = viaConnection.get(ProtocolInfo.class).getPipeline();
+                    viaConnection.clearStoredObjects();
+                    pipeline.cleanPipes();
+                    if (protocols == null) {
+                        // TODO Check Bungee Supported Protocols? *shrugs*
+                        protocolId = info.getProtocolVersion();
+                    } else {
+                        for (Pair<Integer, Protocol> prot : protocols) {
+                            pipeline.add(prot.getValue());
+                        }
+                    }
+
+                    viaConnection.put(info);
+                    viaConnection.put(storage);
+
+                    viaConnection.setActive(protocols != null);
+
+                    // Init all protocols TODO check if this can get moved up to the previous for loop, and doesn't require the pipeline to already exist.
+                    for (Protocol protocol : pipeline.pipes()) {
+                        protocol.init(viaConnection);
+                    }
+
+                    Object wrapper = channelWrapper.get(player);
+                    setVersion.invoke(wrapper, protocolId);
+
+                    Object entityMap = getEntityMap.invoke(null, protocolId);
+                    entityRewrite.set(player, entityMap);
+                }
+            }
+        }
+    }
+}

bungee/src/main/java/us/myles/ViaVersion/bungee/listeners/UpdateListener.java

@@ -0,0 +1,18 @@
+package us.myles.ViaVersion.bungee.listeners;
+
+import net.md_5.bungee.api.event.PostLoginEvent;
+import net.md_5.bungee.api.plugin.Listener;
+import net.md_5.bungee.event.EventHandler;
+import us.myles.ViaVersion.api.Via;
+import us.myles.ViaVersion.update.UpdateUtil;
+
+public class UpdateListener implements Listener {
+
+    @EventHandler
+    public void onJoin(PostLoginEvent e) {
+        if (e.getPlayer().hasPermission("viaversion.update")
+                && Via.getConfig().isCheckForUpdates()) {
+            UpdateUtil.sendUpdateMessage(e.getPlayer().getUniqueId());
+        }
+    }
+}

bungee/src/main/java/us/myles/ViaVersion/bungee/platform/BungeeBossBar.java

@@ -0,0 +1,34 @@
+package us.myles.ViaVersion.bungee.platform;
+
+import net.md_5.bungee.api.connection.ProxiedPlayer;
+import us.myles.ViaVersion.api.boss.BossBar;
+import us.myles.ViaVersion.api.boss.BossColor;
+import us.myles.ViaVersion.api.boss.BossStyle;
+import us.myles.ViaVersion.boss.CommonBoss;
+
+public class BungeeBossBar extends CommonBoss<ProxiedPlayer> {
+
+    public BungeeBossBar(String title, float health, BossColor color, BossStyle style) {
+        super(title, health, color, style);
+    }
+
+
+    @Override
+    public BossBar addPlayer(ProxiedPlayer player) {
+        addPlayer(player.getUniqueId());
+        return this;
+    }
+
+    @Override
+    public BossBar addPlayers(ProxiedPlayer... players) {
+        for (ProxiedPlayer p : players)
+            addPlayer(p);
+        return this;
+    }
+
+    @Override
+    public BossBar removePlayer(ProxiedPlayer player) {
+        removePlayer(player.getUniqueId());
+        return this;
+    }
+}

bungee/src/main/java/us/myles/ViaVersion/bungee/platform/BungeeConfigAPI.java

@@ -0,0 +1,232 @@
+package us.myles.ViaVersion.bungee.platform;
+
+import us.myles.ViaVersion.api.ViaVersionConfig;
+import us.myles.ViaVersion.api.protocol.ProtocolVersion;
+import us.myles.ViaVersion.bungee.providers.BungeeVersionProvider;
+import us.myles.ViaVersion.util.Config;
+
+import java.io.File;
+import java.util.*;
+
+public class BungeeConfigAPI extends Config implements ViaVersionConfig {
+    private static List<String> UNSUPPORTED = Arrays.asList("nms-player-ticking", "item-cache", "anti-xray-patch");
+
+    public BungeeConfigAPI(File configFile) {
+        super(new File(configFile, "config.yml"));
+    }
+
+    @Override
+    protected void handleConfig(Map<String, Object> config) {
+        // Parse servers
+        Map<String, Object> servers;
+        if (!(config.get("bungee-servers") instanceof Map)) {
+            servers = new HashMap<>();
+        } else {
+            servers = (Map) config.get("bungee-servers");
+        }
+        // Convert any bad Protocol Ids
+        for (Map.Entry<String, Object> entry : new HashSet<>(servers.entrySet())) {
+            if (!(entry.getValue() instanceof Integer)) {
+                if (entry.getValue() instanceof String) {
+                    ProtocolVersion found = ProtocolVersion.getClosest((String) entry.getValue());
+                    if (found != null) {
+                        servers.put(entry.getKey(), found.getId());
+                    } else {
+                        servers.remove(entry.getKey()); // Remove!
+                    }
+                } else {
+                    servers.remove(entry.getKey()); // Remove!
+                }
+            }
+        }
+        // Ensure default exists
+        if (!servers.containsKey("default")) {
+            servers.put("default", BungeeVersionProvider.getLowestSupportedVersion());
+        }
+        // Put back
+        config.put("bungee-servers", servers);
+    }
+
+    @Override
+    public List<String> getUnsupportedOptions() {
+        return UNSUPPORTED;
+    }
+
+    public boolean isCheckForUpdates() {
+        return getBoolean("checkforupdates", true);
+    }
+
+    @Override
+    public boolean isPreventCollision() {
+        return getBoolean("prevent-collision", true);
+    }
+
+    @Override
+    public boolean isNewEffectIndicator() {
+        return getBoolean("use-new-effect-indicator", true);
+    }
+
+    @Override
+    public boolean isShowNewDeathMessages() {
+        return getBoolean("use-new-deathmessages", true);
+    }
+
+    @Override
+    public boolean isSuppressMetadataErrors() {
+        return getBoolean("suppress-metadata-errors", false);
+    }
+
+    @Override
+    public boolean isShieldBlocking() {
+        return getBoolean("shield-blocking", true);
+    }
+
+    @Override
+    public boolean isHologramPatch() {
+        return getBoolean("hologram-patch", false);
+    }
+
+    @Override
+    public boolean isBossbarPatch() {
+        return getBoolean("bossbar-patch", true);
+    }
+
+    @Override
+    public boolean isBossbarAntiflicker() {
+        return getBoolean("bossbar-anti-flicker", false);
+    }
+
+    @Override
+    public boolean isUnknownEntitiesSuppressed() {
+        return false;
+    }
+
+    @Override
+    public double getHologramYOffset() {
+        return getDouble("hologram-y", -0.96D);
+    }
+
+    @Override
+    public boolean isBlockBreakPatch() {
+        return false;
+    }
+
+    @Override
+    public int getMaxPPS() {
+        return getInt("max-pps", 800);
+    }
+
+    @Override
+    public String getMaxPPSKickMessage() {
+        return getString("max-pps-kick-msg", "Sending packets too fast? lag?");
+    }
+
+    @Override
+    public int getTrackingPeriod() {
+        return getInt("tracking-period", 6);
+    }
+
+    @Override
+    public int getWarningPPS() {
+        return getInt("tracking-warning-pps", 120);
+    }
+
+    @Override
+    public int getMaxWarnings() {
+        return getInt("tracking-max-warnings", 3);
+    }
+
+    @Override
+    public String getMaxWarningsKickMessage() {
+        return getString("tracking-max-kick-msg", "You are sending too many packets, :(");
+    }
+
+    @Override
+    public boolean isAntiXRay() {
+        return false;
+    }
+
+    @Override
+    public boolean isSendSupportedVersions() {
+        return getBoolean("send-supported-versions", false);
+    }
+
+    @Override
+    public boolean isStimulatePlayerTick() {
+        return getBoolean("simulate-pt", true);
+    }
+
+    @Override
+    public boolean isItemCache() {
+        return false;
+    }
+
+    @Override
+    public boolean isNMSPlayerTicking() {
+        return false;
+    }
+
+    @Override
+    public boolean isReplacePistons() {
+        return getBoolean("replace-pistons", false);
+    }
+
+    @Override
+    public int getPistonReplacementId() {
+        return getInt("replacement-piston-id", 0);
+    }
+
+    public boolean isAutoTeam() {
+        // Collision has to be enabled first
+        return isPreventCollision() && getBoolean("auto-team", true);
+    }
+
+    @Override
+    public boolean isForceJsonTransform() {
+        return getBoolean("force-json-transform", false);
+    }
+
+    @Override
+    public List<Integer> getBlockedProtocols() {
+        return getIntegerList("block-protocols");
+    }
+
+    @Override
+    public String getBlockedDisconnectMsg() {
+        return getString("block-disconnect-msg", "You are using an unsupported Minecraft version!");
+    }
+
+    @Override
+    public String getReloadDisconnectMsg() {
+        return getString("reload-disconnect-msg", "Server reload, please rejoin!");
+    }
+
+    /**
+     * What is the interval for checking servers via ping
+     * -1 for disabled
+     *
+     * @return Ping interval in seconds
+     */
+    public int getBungeePingInterval() {
+        return getInt("bungee-ping-interval", 60);
+    }
+
+    /**
+     * Should the bungee ping be saved to the config on change.
+     *
+     * @return True if it should save
+     */
+    public boolean isBungeePingSave() {
+        return getBoolean("bungee-ping-save", true);
+    }
+
+    /**
+     * Get the listed server protocols in the config.
+     * default will be listed as default.
+     *
+     * @return Map of String, Integer
+     */
+    public Map<String, Integer> getBungeeServerProtocols() {
+        return get("bungee-servers", Map.class, new HashMap<>());
+    }
+}

bungee/src/main/java/us/myles/ViaVersion/bungee/platform/BungeeTaskId.java

@@ -0,0 +1,11 @@
+package us.myles.ViaVersion.bungee.platform;
+
+import lombok.AllArgsConstructor;
+import lombok.Getter;
+import us.myles.ViaVersion.api.platform.TaskId;
+
+@Getter
+@AllArgsConstructor
+public class BungeeTaskId implements TaskId {
+    private Integer object;
+}

bungee/src/main/java/us/myles/ViaVersion/bungee/platform/BungeeViaAPI.java

@@ -0,0 +1,89 @@
+package us.myles.ViaVersion.bungee.platform;
+
+import io.netty.buffer.ByteBuf;
+import lombok.NonNull;
+import net.md_5.bungee.api.config.ServerInfo;
+import net.md_5.bungee.api.connection.ProxiedPlayer;
+import us.myles.ViaVersion.api.Via;
+import us.myles.ViaVersion.api.ViaAPI;
+import us.myles.ViaVersion.api.boss.BossBar;
+import us.myles.ViaVersion.api.boss.BossColor;
+import us.myles.ViaVersion.api.boss.BossStyle;
+import us.myles.ViaVersion.api.data.UserConnection;
+import us.myles.ViaVersion.api.protocol.ProtocolRegistry;
+import us.myles.ViaVersion.bungee.service.ProtocolDetectorService;
+import us.myles.ViaVersion.protocols.base.ProtocolInfo;
+
+import java.util.Map;
+import java.util.SortedSet;
+import java.util.TreeSet;
+import java.util.UUID;
+
+public class BungeeViaAPI implements ViaAPI<ProxiedPlayer> {
+    @Override
+    public int getPlayerVersion(@NonNull ProxiedPlayer player) {
+        if (!isPorted(player.getUniqueId()))
+            return ProtocolRegistry.SERVER_PROTOCOL;
+        return getPortedPlayers().get(player.getUniqueId()).get(ProtocolInfo.class).getProtocolVersion();
+    }
+
+    @Override
+    public int getPlayerVersion(@NonNull UUID uuid) {
+        if (!isPorted(uuid))
+            return ProtocolRegistry.SERVER_PROTOCOL;
+        return getPortedPlayers().get(uuid).get(ProtocolInfo.class).getProtocolVersion();
+    }
+
+    @Override
+    public boolean isPorted(UUID playerUUID) {
+        return getPortedPlayers().containsKey(playerUUID);
+    }
+
+    @Override
+    public String getVersion() {
+        return Via.getPlatform().getPluginVersion();
+    }
+
+    @Override
+    public void sendRawPacket(UUID uuid, ByteBuf packet) throws IllegalArgumentException {
+        if (!isPorted(uuid)) throw new IllegalArgumentException("This player is not controlled by ViaVersion!");
+        UserConnection ci = getPortedPlayers().get(uuid);
+        ci.sendRawPacket(packet);
+    }
+
+    @Override
+    public void sendRawPacket(ProxiedPlayer player, ByteBuf packet) throws IllegalArgumentException {
+        sendRawPacket(player.getUniqueId(), packet);
+    }
+
+    @Override
+    public BossBar createBossBar(String title, BossColor color, BossStyle style) {
+        return new BungeeBossBar(title, 1F, color, style);
+    }
+
+    @Override
+    public BossBar createBossBar(String title, float health, BossColor color, BossStyle style) {
+        return new BungeeBossBar(title, health, color, style);
+    }
+
+    @Override
+    public SortedSet<Integer> getSupportedVersions() {
+        SortedSet<Integer> outputSet = new TreeSet<>(ProtocolRegistry.getSupportedVersions());
+        outputSet.removeAll(Via.getPlatform().getConf().getBlockedProtocols());
+
+        return outputSet;
+    }
+
+    public Map<UUID, UserConnection> getPortedPlayers() {
+        return Via.getManager().getPortedPlayers();
+    }
+
+    /**
+     * Forces ViaVersion to probe a server
+     *
+     * @param serverInfo The serverinfo to probe
+     */
+    public void probeServer(ServerInfo serverInfo) {
+        ProtocolDetectorService.probeServer(serverInfo);
+    }
+}

bungee/src/main/java/us/myles/ViaVersion/bungee/platform/BungeeViaInjector.java

@@ -0,0 +1,59 @@
+package us.myles.ViaVersion.bungee.platform;
+
+import io.netty.channel.Channel;
+import io.netty.channel.ChannelInitializer;
+import us.myles.ViaVersion.api.Via;
+import us.myles.ViaVersion.api.platform.ViaInjector;
+import us.myles.ViaVersion.bungee.handlers.BungeeChannelInitializer;
+import us.myles.ViaVersion.util.ReflectionUtil;
+
+import java.lang.reflect.Field;
+import java.lang.reflect.Modifier;
+import java.util.List;
+
+public class BungeeViaInjector implements ViaInjector {
+    @Override
+    public void inject() throws Exception {
+        try {
+            try {
+
+                Class<?> pipelineUtils = Class.forName("net.md_5.bungee.netty.PipelineUtils");
+                Field field = pipelineUtils.getDeclaredField("SERVER_CHILD");
+                field.setAccessible(true);
+                // Remove any final stuff
+                Field modifiersField = Field.class.getDeclaredField("modifiers");
+                modifiersField.setAccessible(true);
+                modifiersField.setInt(field, field.getModifiers() & ~Modifier.FINAL);
+
+                BungeeChannelInitializer newInit = new BungeeChannelInitializer((ChannelInitializer<Channel>) field.get(null));
+                field.set(null, newInit);
+            } catch (NoSuchFieldException e) {
+                throw new Exception("Unable to find core component 'childHandler', please check your plugins. issue: ");
+            }
+        } catch (Exception e) {
+            Via.getPlatform().getLogger().severe("Unable to inject ViaVersion, please post these details on our GitHub and ensure you're using a compatible server version.");
+            throw e;
+        }
+    }
+
+    @Override
+    public void uninject() {
+        Via.getPlatform().getLogger().severe("ViaVersion cannot remove itself from Bungee without a reboot!");
+    }
+
+
+    @Override
+    public int getServerProtocolVersion() throws Exception {
+        return (int) ReflectionUtil.getStatic(Class.forName("net.md_5.bungee.protocol.ProtocolConstants"), "SUPPORTED_VERSION_IDS", List.class).get(0);
+    }
+
+    @Override
+    public String getEncoderName() {
+        return "via-encoder";
+    }
+
+    @Override
+    public String getDecoderName() {
+        return "via-decoder";
+    }
+}

bungee/src/main/java/us/myles/ViaVersion/bungee/platform/BungeeViaLoader.java

@@ -0,0 +1,39 @@
+package us.myles.ViaVersion.bungee.platform;
+
+import lombok.AllArgsConstructor;
+import net.md_5.bungee.api.ProxyServer;
+import us.myles.ViaVersion.BungeePlugin;
+import us.myles.ViaVersion.api.Via;
+import us.myles.ViaVersion.api.platform.ViaPlatformLoader;
+import us.myles.ViaVersion.bungee.handlers.BungeeServerHandler;
+import us.myles.ViaVersion.bungee.listeners.UpdateListener;
+import us.myles.ViaVersion.bungee.providers.BungeeEntityIdProvider;
+import us.myles.ViaVersion.bungee.providers.BungeeMovementTransmitter;
+import us.myles.ViaVersion.bungee.providers.BungeeVersionProvider;
+import us.myles.ViaVersion.bungee.service.ProtocolDetectorService;
+import us.myles.ViaVersion.protocols.base.VersionProvider;
+import us.myles.ViaVersion.protocols.protocol1_9to1_8.providers.EntityIdProvider;
+import us.myles.ViaVersion.protocols.protocol1_9to1_8.providers.MovementTransmitterProvider;
+
+import java.util.concurrent.TimeUnit;
+
+@AllArgsConstructor
+public class BungeeViaLoader implements ViaPlatformLoader {
+    private BungeePlugin plugin;
+
+    @Override
+    public void load() {
+        // Listeners
+        ProxyServer.getInstance().getPluginManager().registerListener(plugin, plugin);
+        ProxyServer.getInstance().getPluginManager().registerListener(plugin, new UpdateListener());
+        ProxyServer.getInstance().getPluginManager().registerListener(plugin, new BungeeServerHandler());
+
+        // Providers
+        Via.getManager().getProviders().use(MovementTransmitterProvider.class, new BungeeMovementTransmitter());
+        Via.getManager().getProviders().use(VersionProvider.class, new BungeeVersionProvider());
+        Via.getManager().getProviders().use(EntityIdProvider.class, new BungeeEntityIdProvider());
+        if (plugin.getConf().getBungeePingInterval() > 0) {
+            plugin.getProxy().getScheduler().schedule(plugin, new ProtocolDetectorService(plugin), 0, plugin.getConf().getBungeePingInterval(), TimeUnit.SECONDS);
+        }
+    }
+}

bungee/src/main/java/us/myles/ViaVersion/bungee/providers/BungeeEntityIdProvider.java

@@ -0,0 +1,28 @@
+package us.myles.ViaVersion.bungee.providers;
+
+import net.md_5.bungee.api.connection.ProxiedPlayer;
+import us.myles.ViaVersion.api.data.UserConnection;
+import us.myles.ViaVersion.bungee.storage.BungeeStorage;
+import us.myles.ViaVersion.protocols.protocol1_9to1_8.providers.EntityIdProvider;
+
+import java.lang.reflect.Method;
+
+public class BungeeEntityIdProvider extends EntityIdProvider {
+    private static Method getClientEntityId;
+
+    static {
+        try {
+            getClientEntityId = Class.forName("net.md_5.bungee.UserConnection").getDeclaredMethod("getClientEntityId");
+        } catch (NoSuchMethodException | ClassNotFoundException e) {
+            e.printStackTrace();
+        }
+    }
+
+    @Override
+    public int getEntityId(UserConnection user) throws Exception {
+        BungeeStorage storage = user.get(BungeeStorage.class);
+        ProxiedPlayer player = storage.getPlayer();
+
+        return (int) getClientEntityId.invoke(player);
+    }
+}

bungee/src/main/java/us/myles/ViaVersion/bungee/providers/BungeeMovementTransmitter.java

@@ -0,0 +1,34 @@
+package us.myles.ViaVersion.bungee.providers;
+
+import us.myles.ViaVersion.api.PacketWrapper;
+import us.myles.ViaVersion.api.data.UserConnection;
+import us.myles.ViaVersion.api.type.Type;
+import us.myles.ViaVersion.packets.State;
+import us.myles.ViaVersion.protocols.base.ProtocolInfo;
+import us.myles.ViaVersion.protocols.protocol1_9to1_8.providers.MovementTransmitterProvider;
+import us.myles.ViaVersion.protocols.protocol1_9to1_8.storage.MovementTracker;
+
+public class BungeeMovementTransmitter extends MovementTransmitterProvider {
+    @Override
+    public Object getFlyingPacket() {
+        return null;
+    }
+
+    @Override
+    public Object getGroundPacket() {
+        return null;
+    }
+
+    public void sendPlayer(UserConnection userConnection) {
+        if (userConnection.get(ProtocolInfo.class).getState() == State.PLAY) {
+            PacketWrapper wrapper = new PacketWrapper(0x03, null, userConnection);
+            wrapper.write(Type.BOOLEAN, userConnection.get(MovementTracker.class).isGround());
+            try {
+                wrapper.sendToServer();
+            } catch (Exception e) {
+                e.printStackTrace();
+            }
+            // PlayerPackets will increment idle
+        }
+    }
+}

bungee/src/main/java/us/myles/ViaVersion/bungee/providers/BungeeVersionProvider.java

@@ -0,0 +1,66 @@
+package us.myles.ViaVersion.bungee.providers;
+
+import com.google.common.collect.Lists;
+import net.md_5.bungee.api.ProxyServer;
+import us.myles.ViaVersion.api.Via;
+import us.myles.ViaVersion.api.data.UserConnection;
+import us.myles.ViaVersion.protocols.base.ProtocolInfo;
+import us.myles.ViaVersion.protocols.base.VersionProvider;
+import us.myles.ViaVersion.util.ReflectionUtil;
+
+import java.util.List;
+
+public class BungeeVersionProvider extends VersionProvider {
+    private static Class<?> ref;
+
+    static {
+        try {
+            ref = Class.forName("net.md_5.bungee.protocol.ProtocolConstants");
+        } catch (Exception e) {
+            Via.getPlatform().getLogger().severe("Could not detect the ProtocolConstants class");
+            e.printStackTrace();
+        }
+    }
+
+    @Override
+    public int getServerProtocol(UserConnection user) throws Exception {
+        if (ref == null)
+            return super.getServerProtocol(user);
+        // TODO Have one constant list forever until restart? (Might limit plugins if they change this)
+        List<Integer> list = ReflectionUtil.getStatic(ref, "SUPPORTED_VERSION_IDS", List.class);
+
+        ProtocolInfo info = user.get(ProtocolInfo.class);
+
+        // Bungee supports it
+        if (list.contains(info.getProtocolVersion()))
+            return info.getProtocolVersion();
+
+        // Older than bungee supports, get the lowest version
+        if (info.getProtocolVersion() < list.get(0)) {
+            return getLowestSupportedVersion();
+        }
+
+        // Loop through all protocols to get the closest protocol id that bungee supports
+        for (Integer protocol : Lists.reverse(list)) {
+            if (info.getProtocolVersion() > protocol)
+                return protocol;
+        }
+
+        Via.getPlatform().getLogger().severe("Panic, no protocol id found for " + info.getProtocolVersion());
+        return info.getProtocolVersion();
+    }
+
+    public static int getLowestSupportedVersion() {
+        List<Integer> list;
+        try {
+            list = ReflectionUtil.getStatic(ref, "SUPPORTED_VERSION_IDS", List.class);
+            return list.get(0);
+        } catch (NoSuchFieldException e) {
+            e.printStackTrace();
+        } catch (IllegalAccessException e) {
+            e.printStackTrace();
+        }
+        // Fallback
+        return ProxyServer.getInstance().getProtocolVersion();
+    }
+}

bungee/src/main/java/us/myles/ViaVersion/bungee/service/ProtocolDetectorService.java

@@ -0,0 +1,80 @@
+package us.myles.ViaVersion.bungee.service;
+
+import lombok.Getter;
+import net.md_5.bungee.api.Callback;
+import net.md_5.bungee.api.ServerPing;
+import net.md_5.bungee.api.config.ServerInfo;
+import us.myles.ViaVersion.BungeePlugin;
+import us.myles.ViaVersion.api.Via;
+import us.myles.ViaVersion.bungee.platform.BungeeConfigAPI;
+import us.myles.ViaVersion.bungee.providers.BungeeVersionProvider;
+
+import java.util.HashMap;
+import java.util.Map;
+import java.util.concurrent.ConcurrentHashMap;
+
+public class ProtocolDetectorService implements Runnable {
+    private static final Map<String, Integer> detectedProtocolIds = new ConcurrentHashMap<>();
+    private BungeePlugin plugin;
+    @Getter
+    private static ProtocolDetectorService instance;
+
+    public ProtocolDetectorService(BungeePlugin plugin) {
+        this.plugin = plugin;
+        instance = this;
+    }
+
+    public static Integer getProtocolId(String serverName) {
+        // Step 1. Check Config
+        Map<String, Integer> servers = ((BungeeConfigAPI) Via.getConfig()).getBungeeServerProtocols();
+        if (servers.containsKey(serverName)) {
+            return servers.get(serverName);
+        }
+        // Step 2. Check Detected
+        if (detectedProtocolIds.containsKey(serverName)) {
+            return detectedProtocolIds.get(serverName);
+        }
+        // Step 3. Use Default
+        if (servers.containsKey("default")) {
+            return servers.get("default");
+        }
+        // Step 4: Use bungee lowest supported... *cries*
+        return BungeeVersionProvider.getLowestSupportedVersion();
+    }
+
+    @Override
+    public void run() {
+        for (final Map.Entry<String, ServerInfo> lists : plugin.getProxy().getServers().entrySet()) {
+            probeServer(lists.getValue());
+        }
+    }
+
+    public static void probeServer(final ServerInfo serverInfo) {
+        final String key = serverInfo.getName();
+        serverInfo.ping(new Callback<ServerPing>() {
+            @Override
+            public void done(ServerPing serverPing, Throwable throwable) {
+                if (throwable == null) {
+                    detectedProtocolIds.put(key, serverPing.getVersion().getProtocol());
+                    if (((BungeeConfigAPI) Via.getConfig()).isBungeePingSave()) {
+                        Map<String, Integer> servers = ((BungeeConfigAPI) Via.getConfig()).getBungeeServerProtocols();
+                        if (servers.containsKey(key)) {
+                            if (servers.get(key) == serverPing.getVersion().getProtocol()) {
+                                return;
+                            }
+                        }
+                        // Save Server
+                        servers.put(key, serverPing.getVersion().getProtocol());
+                        // Save
+                        Via.getPlatform().getConfigurationProvider().saveConfig();
+                    }
+                }
+            }
+        });
+    }
+
+    public static Map<String, Integer> getDetectedIds() {
+        return new HashMap<>(detectedProtocolIds);
+    }
+
+}

bungee/src/main/java/us/myles/ViaVersion/bungee/storage/BungeeStorage.java

@@ -0,0 +1,20 @@
+package us.myles.ViaVersion.bungee.storage;
+
+import lombok.Data;
+import lombok.EqualsAndHashCode;
+import net.md_5.bungee.api.connection.ProxiedPlayer;
+import us.myles.ViaVersion.api.data.StoredObject;
+import us.myles.ViaVersion.api.data.UserConnection;
+
+@Data
+@EqualsAndHashCode(callSuper = true)
+public class BungeeStorage extends StoredObject {
+    private ProxiedPlayer player;
+    private String currentServer;
+
+    public BungeeStorage(UserConnection user, ProxiedPlayer player) {
+        super(user);
+        this.player = player;
+        this.currentServer = "";
+    }
+}

bungee/src/main/java/us/myles/ViaVersion/bungee/util/BungeePipelineUtil.java

@@ -0,0 +1,70 @@
+package us.myles.ViaVersion.bungee.util;
+
+import io.netty.buffer.ByteBuf;
+import io.netty.channel.ChannelHandlerContext;
+import io.netty.handler.codec.MessageToByteEncoder;
+import io.netty.handler.codec.MessageToMessageDecoder;
+import us.myles.ViaVersion.api.Via;
+
+import java.lang.reflect.InvocationTargetException;
+import java.lang.reflect.Method;
+import java.util.ArrayList;
+import java.util.List;
+
+public class BungeePipelineUtil {
+    private static Method DECODE_METHOD;
+    private static Method ENCODE_METHOD;
+
+    static {
+        try {
+            DECODE_METHOD = MessageToMessageDecoder.class.getDeclaredMethod("decode", ChannelHandlerContext.class, Object.class, List.class);
+            DECODE_METHOD.setAccessible(true);
+        } catch (NoSuchMethodException e) {
+            e.printStackTrace();
+        }
+        try {
+            ENCODE_METHOD = MessageToByteEncoder.class.getDeclaredMethod("encode", ChannelHandlerContext.class, Object.class, ByteBuf.class);
+            ENCODE_METHOD.setAccessible(true);
+        } catch (NoSuchMethodException e) {
+            e.printStackTrace();
+        }
+    }
+
+    public static List<Object> callDecode(MessageToMessageDecoder decoder, ChannelHandlerContext ctx, ByteBuf input) throws InvocationTargetException {
+        List<Object> output = new ArrayList<>();
+        try {
+            BungeePipelineUtil.DECODE_METHOD.invoke(decoder, ctx, input, output);
+        } catch (IllegalAccessException e) {
+            e.printStackTrace();
+        }
+        return output;
+    }
+
+    public static ByteBuf callEncode(MessageToByteEncoder encoder, ChannelHandlerContext ctx, ByteBuf input) throws InvocationTargetException {
+        ByteBuf output = ctx.alloc().buffer();
+        try {
+            BungeePipelineUtil.ENCODE_METHOD.invoke(encoder, ctx, input, output);
+        } catch (IllegalAccessException e) {
+            e.printStackTrace();
+        }
+        return output;
+    }
+
+    public static ByteBuf decompress(ChannelHandlerContext ctx, ByteBuf bytebuf) {
+        try {
+            return (ByteBuf) callDecode((MessageToMessageDecoder) ctx.pipeline().get("decompress"), ctx.pipeline().context("decompress"), bytebuf).get(0);
+        } catch (InvocationTargetException e) {
+            e.printStackTrace();
+            return ctx.alloc().buffer();
+        }
+    }
+
+    public static ByteBuf compress(ChannelHandlerContext ctx, ByteBuf bytebuf) {
+        try {
+            return callEncode((MessageToByteEncoder) ctx.pipeline().get("compress"), ctx.pipeline().context("compress"), bytebuf);
+        } catch (InvocationTargetException e) {
+            e.printStackTrace();
+            return ctx.alloc().buffer();
+        }
+    }
+}

bungee/src/main/resources/bungee.yml

@@ -0,0 +1,5 @@
+name: ViaVersion
+main: us.myles.ViaVersion.BungeePlugin
+description: ${project.description}
+author: _MylesC, Matsv
+version: ${project.version}

circle.yml

@@ -0,0 +1,11 @@
+machine:
+  java:
+    version: oraclejdk8
+general:
+  artifacts:
+    - "target/*.jar"
+test:
+  override:
+    - mvn clean install -B
+  post:
+    - cp ./target/*.jar $CIRCLE_ARTIFACTS

common/pom.xml

@@ -0,0 +1,24 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project xmlns="http://maven.apache.org/POM/4.0.0"
+         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+    <parent>
+        <artifactId>viaversion-parent</artifactId>
+        <groupId>us.myles</groupId>
+        <version>1.0.0</version>
+    </parent>
+
+    <modelVersion>4.0.0</modelVersion>
+
+    <artifactId>viaversion-common</artifactId>
+    <dependencies>
+        <!-- Snake YAML -->
+
+        <dependency>
+            <groupId>org.yaml</groupId>
+            <artifactId>snakeyaml</artifactId>
+            <version>1.18-SNAPSHOT</version>
+            <scope>provided</scope>
+        </dependency>
+    </dependencies>
+</project>

common/src/main/java/us/myles/ViaVersion/ViaManager.java

@@ -0,0 +1,117 @@
+package us.myles.ViaVersion;
+
+import lombok.Builder;
+import lombok.Getter;
+import lombok.Setter;
+import us.myles.ViaVersion.api.data.UserConnection;
+import us.myles.ViaVersion.api.platform.ViaInjector;
+import us.myles.ViaVersion.api.platform.ViaPlatform;
+import us.myles.ViaVersion.api.platform.ViaPlatformLoader;
+import us.myles.ViaVersion.api.platform.providers.ViaProviders;
+import us.myles.ViaVersion.api.protocol.ProtocolRegistry;
+import us.myles.ViaVersion.api.protocol.ProtocolVersion;
+import us.myles.ViaVersion.commands.ViaCommandHandler;
+import us.myles.ViaVersion.protocols.base.ProtocolInfo;
+import us.myles.ViaVersion.update.UpdateUtil;
+
+import java.util.Map;
+import java.util.UUID;
+import java.util.concurrent.ConcurrentHashMap;
+
+@Getter
+public class ViaManager {
+    private final Map<UUID, UserConnection> portedPlayers = new ConcurrentHashMap<>();
+    private ViaPlatform platform;
+    private ViaProviders providers = new ViaProviders();
+    @Setter
+    private boolean debug = false;
+    // Internals
+    private ViaInjector injector;
+    private ViaCommandHandler commandHandler;
+    private ViaPlatformLoader loader;
+
+    @Builder
+    public ViaManager(ViaPlatform platform, ViaInjector injector, ViaCommandHandler commandHandler, ViaPlatformLoader loader) {
+        this.platform = platform;
+        this.injector = injector;
+        this.commandHandler = commandHandler;
+        this.loader = loader;
+    }
+
+    public void init() {
+        if (System.getProperty("ViaVersion") != null) {
+            // Reload?
+            platform.onReload();
+        }
+        // Check for updates
+        if (platform.getConf().isCheckForUpdates())
+            UpdateUtil.sendUpdateMessage();
+        // Inject
+        try {
+            injector.inject();
+        } catch (Exception e) {
+            getPlatform().getLogger().severe("ViaVersion failed to inject:");
+            e.printStackTrace();
+            return;
+        }
+        // Mark as injected
+        System.setProperty("ViaVersion", getPlatform().getPluginVersion());
+        // If successful
+        platform.runSync(new Runnable() {
+            @Override
+            public void run() {
+                onServerLoaded();
+            }
+        });
+
+    }
+
+    public void onServerLoaded() {
+        // Load Server Protocol
+        try {
+            ProtocolRegistry.SERVER_PROTOCOL = injector.getServerProtocolVersion();
+        } catch (Exception e) {
+            getPlatform().getLogger().severe("ViaVersion failed to get the server protocol!");
+            e.printStackTrace();
+        }
+        // Check if there are any pipes to this version
+        if (ProtocolRegistry.SERVER_PROTOCOL != -1) {
+            getPlatform().getLogger().info("ViaVersion detected server version: " + ProtocolVersion.getProtocol(ProtocolRegistry.SERVER_PROTOCOL));
+            if (!ProtocolRegistry.isWorkingPipe()) {
+                getPlatform().getLogger().warning("ViaVersion does not have any compatible versions for this server version, please read our resource page carefully.");
+            }
+        }
+        // Load Listeners / Tasks
+        ProtocolRegistry.onServerLoaded();
+
+        // Load Platform
+        loader.load();
+
+        // Refresh Versions
+        ProtocolRegistry.refreshVersions();
+    }
+
+    public void destroy() {
+        // Uninject
+        getPlatform().getLogger().info("ViaVersion is disabling, if this is a reload and you experience issues consider rebooting.");
+        try {
+            injector.uninject();
+        } catch (Exception e) {
+            getPlatform().getLogger().severe("ViaVersion failed to uninject:");
+            e.printStackTrace();
+        }
+    }
+
+    public void addPortedClient(UserConnection info) {
+        portedPlayers.put(info.get(ProtocolInfo.class).getUuid(), info);
+    }
+
+    public void removePortedClient(UUID clientID) {
+        portedPlayers.remove(clientID);
+    }
+
+    public UserConnection getConnection(UUID playerUUID) {
+        return portedPlayers.get(playerUUID);
+    }
+
+}

common/src/main/java/us/myles/ViaVersion/api/PacketWrapper.java

@@ -0,0 +1,477 @@
+package us.myles.ViaVersion.api;
+
+import com.google.common.base.Preconditions;
+import io.netty.buffer.ByteBuf;
+import io.netty.buffer.Unpooled;
+import io.netty.channel.ChannelFuture;
+import lombok.Getter;
+import lombok.Setter;
+import us.myles.ViaVersion.api.data.UserConnection;
+import us.myles.ViaVersion.api.protocol.Protocol;
+import us.myles.ViaVersion.api.remapper.ValueCreator;
+import us.myles.ViaVersion.api.type.Type;
+import us.myles.ViaVersion.api.type.TypeConverter;
+import us.myles.ViaVersion.exception.InformativeException;
+import us.myles.ViaVersion.packets.Direction;
+import us.myles.ViaVersion.packets.State;
+import us.myles.ViaVersion.protocols.base.ProtocolInfo;
+
+import java.io.IOException;
+import java.util.ArrayList;
+import java.util.Collections;
+import java.util.LinkedList;
+import java.util.List;
+
+public class PacketWrapper {
+    public static final int PASSTHROUGH_ID = 1000;
+
+    private final ByteBuf inputBuffer;
+    private final UserConnection userConnection;
+    private boolean send = true;
+    @Setter
+    @Getter
+    private int id = -1;
+    private final LinkedList<Pair<Type, Object>> readableObjects = new LinkedList<>();
+    private final List<Pair<Type, Object>> packetValues = new ArrayList<>();
+
+    public PacketWrapper(int packetID, ByteBuf inputBuffer, UserConnection userConnection) {
+        this.id = packetID;
+        this.inputBuffer = inputBuffer;
+        this.userConnection = userConnection;
+    }
+
+    /**
+     * Get a part from the output
+     *
+     * @param type  The type of the part you wish to get.
+     * @param <T>   The return type of the type you wish to get.
+     * @param index The index of the part (relative to the type)
+     * @return The requested type or throws ArrayIndexOutOfBounds
+     * @throws Exception If it fails to find it, an exception will be thrown.
+     */
+    public <T> T get(Type<T> type, int index) throws Exception {
+        int currentIndex = 0;
+        for (Pair<Type, Object> packetValue : packetValues) {
+            if (packetValue.getKey() == type) { // Ref check
+                if (currentIndex == index) {
+                    return (T) packetValue.getValue();
+                }
+                currentIndex++;
+            }
+        }
+
+        Exception e = new ArrayIndexOutOfBoundsException("Could not find type " + type.getTypeName() + " at " + index);
+        throw new InformativeException(e).set("Type", type.getTypeName()).set("Index", index).set("Packet ID", getId()).set("Data", packetValues);
+    }
+
+    /**
+     * Check if a type is at an index
+     *
+     * @param type  The type of the part you wish to get.
+     * @param index The index of the part (relative to the type)
+     * @return True if the type is at the index
+     */
+    public boolean is(Type type, int index) {
+        int currentIndex = 0;
+        for (Pair<Type, Object> packetValue : packetValues) {
+            if (packetValue.getKey() == type) { // Ref check
+                if (currentIndex == index) {
+                    return true;
+                }
+                currentIndex++;
+            }
+        }
+        return false;
+    }
+
+    /**
+     * Check if a type is at an index
+     *
+     * @param type  The type of the part you wish to get.
+     * @param index The index of the part (relative to the type)
+     * @return True if the type is at the index
+     */
+    public boolean isReadable(Type type, int index) {
+        int currentIndex = 0;
+        for (Pair<Type, Object> packetValue : readableObjects) {
+            if (packetValue.getKey().getBaseClass() == type.getBaseClass()) { // Ref check
+                if (currentIndex == index) {
+                    return true;
+                }
+                currentIndex++;
+            }
+        }
+        return false;
+    }
+
+
+    /**
+     * Set a currently existing part in the output
+     *
+     * @param type  The type of the part you wish to set.
+     * @param <T>   The return type of the type you wish to set.
+     * @param index The index of the part (relative to the type)
+     * @param value The value of the part you wish to set it to.
+     * @throws Exception If it fails to set it, an exception will be thrown.
+     */
+    public <T> void set(Type<T> type, int index, T value) throws Exception {
+        int currentIndex = 0;
+        for (Pair<Type, Object> packetValue : packetValues) {
+            if (packetValue.getKey() == type) { // Ref check
+                if (currentIndex == index) {
+                    packetValue.setValue(value);
+                    return;
+                }
+                currentIndex++;
+            }
+        }
+        Exception e = new ArrayIndexOutOfBoundsException("Could not find type " + type.getTypeName() + " at " + index);
+        throw new InformativeException(e).set("Type", type.getTypeName()).set("Index", index).set("Packet ID", getId());
+    }
+
+    /**
+     * Read a type from the input.
+     *
+     * @param type The type you wish to read
+     * @param <T>  The return type of the type you wish to read.
+     * @return The requested type
+     * @throws Exception If it fails to read
+     */
+    public <T> T read(Type<T> type) throws Exception {
+        if (type == Type.NOTHING) return null;
+        if (readableObjects.isEmpty()) {
+            Preconditions.checkNotNull(inputBuffer, "This packet does not have an input buffer.");
+            // We could in the future log input read values, but honestly for things like bulk maps, mem waste D:
+            try {
+                return type.read(inputBuffer);
+            } catch (Exception e) {
+                throw new InformativeException(e).set("Type", type.getTypeName()).set("Packet ID", getId()).set("Data", packetValues);
+            }
+        } else {
+            Pair<Type, Object> read = readableObjects.poll();
+            if (read.getKey().equals(type) || (type.getBaseClass().equals(read.getKey().getBaseClass()) && type.getOutputClass().equals(read.getKey().getOutputClass()))) {
+                return (T) read.getValue();
+            } else {
+                if (type == Type.NOTHING) {
+                    return read(type); // retry
+                } else {
+                    Exception e = new IOException("Unable to read type " + type.getTypeName() + ", found " + read.getKey().getTypeName());
+                    throw new InformativeException(e).set("Type", type.getTypeName()).set("Packet ID", getId()).set("Data", packetValues);
+                }
+            }
+        }
+    }
+
+    /**
+     * Write a type to the output.
+     *
+     * @param type  The type to write.
+     * @param <T>   The return type of the type you wish to write.
+     * @param value The value of the type to write.
+     */
+    public <T> void write(Type<T> type, T value) {
+        if (value != null) {
+            if (!type.getOutputClass().isAssignableFrom(value.getClass())) {
+                // attempt conversion
+                if (type instanceof TypeConverter) {
+                    value = (T) ((TypeConverter) type).from(value);
+                } else {
+                    Via.getPlatform().getLogger().warning("Possible type mismatch: " + value.getClass().getName() + " -> " + type.getOutputClass());
+                }
+            }
+        }
+        packetValues.add(new Pair<Type, Object>(type, value));
+    }
+
+    /**
+     * Take a value from the input and write to the output.
+     *
+     * @param type The type to read and write.
+     * @param <T>  The return type of the type you wish to pass through.
+     * @return The type which was read/written.
+     * @throws Exception If it failed to read or write
+     */
+    public <T> T passthrough(Type<T> type) throws Exception {
+        T value = read(type);
+        write(type, value);
+        return value;
+    }
+
+    /**
+     * Take all the inputs and write them to the output.
+     *
+     * @throws Exception If it failed to read or write
+     */
+    public void passthroughAll() throws Exception {
+        // Copy previous objects
+        packetValues.addAll(readableObjects);
+        readableObjects.clear();
+        // If the buffer has readable bytes, copy them.
+        if (inputBuffer.readableBytes() > 0) {
+            passthrough(Type.REMAINING_BYTES);
+        }
+    }
+
+    /**
+     * Write the current output to a buffer.
+     *
+     * @param buffer The buffer to write to.
+     * @throws Exception Throws an exception if it fails to write a value.
+     */
+    public void writeToBuffer(ByteBuf buffer) throws Exception {
+        if (id != -1) {
+            Type.VAR_INT.write(buffer, id);
+        }
+        if (readableObjects.size() > 0) {
+            packetValues.addAll(readableObjects);
+            readableObjects.clear();
+        }
+
+        int index = 0;
+        for (Pair<Type, Object> packetValue : packetValues) {
+            try {
+                Object value = packetValue.getValue();
+                if (value != null) {
+                    if (!packetValue.getKey().getOutputClass().isAssignableFrom(value.getClass())) {
+                        // attempt conversion
+                        if (packetValue.getKey() instanceof TypeConverter) {
+                            value = ((TypeConverter) packetValue.getKey()).from(value);
+                        } else {
+                            Via.getPlatform().getLogger().warning("Possible type mismatch: " + value.getClass().getName() + " -> " + packetValue.getKey().getOutputClass());
+                        }
+                    }
+                }
+                packetValue.getKey().write(buffer, value);
+            } catch (Exception e) {
+                throw new InformativeException(e).set("Index", index).set("Type", packetValue.getKey().getTypeName()).set("Packet ID", getId()).set("Data", packetValues);
+            }
+            index++;
+        }
+        writeRemaining(buffer);
+    }
+
+    /**
+     * Clear the input buffer / readable objects
+     */
+    public void clearInputBuffer() {
+        if (inputBuffer != null)
+            inputBuffer.clear();
+        readableObjects.clear(); // :(
+    }
+
+    /**
+     * Clear the packet, used if you have to change the packet completely
+     */
+    public void clearPacket() {
+        clearInputBuffer();
+        packetValues.clear();
+    }
+
+    private void writeRemaining(ByteBuf output) {
+        if (inputBuffer != null) {
+            output.writeBytes(inputBuffer, inputBuffer.readableBytes());
+        }
+    }
+
+    /**
+     * Send this packet to the associated user.
+     * Be careful not to send packets twice.
+     * (Sends it after current)
+     *
+     * @param packetProtocol      - The protocol version of the packet.
+     * @param skipCurrentPipeline - Skip the current pipeline
+     * @throws Exception if it fails to write
+     */
+    public void send(Class<? extends Protocol> packetProtocol, boolean skipCurrentPipeline) throws Exception {
+        if (!isCancelled()) {
+            ByteBuf output = constructPacket(packetProtocol, skipCurrentPipeline);
+            user().sendRawPacket(output);
+        }
+    }
+
+    /**
+     * Let the packet go through the protocol pipes and write it to ByteBuf
+     *
+     * @param packetProtocol      - The protocol version of the packet.
+     * @param skipCurrentPipeline - Skip the current pipeline
+     * @return Packet buffer
+     * @throws Exception if it fails to write
+     */
+    private ByteBuf constructPacket(Class<? extends Protocol> packetProtocol, boolean skipCurrentPipeline) throws Exception {
+        // Apply current pipeline
+        List<Protocol> protocols = new ArrayList<>(user().get(ProtocolInfo.class).getPipeline().pipes());
+        // Other way if outgoing
+        Collections.reverse(protocols);
+        int index = 0;
+        for (int i = 0; i < protocols.size(); i++) {
+            if (protocols.get(i).getClass().equals(packetProtocol)) {
+                index = skipCurrentPipeline ? (i + 1) : (i);
+                break;
+            }
+        }
+
+        // Reset reader before we start
+        resetReader();
+
+        // Apply other protocols
+        apply(Direction.OUTGOING, user().get(ProtocolInfo.class).getState(), index, protocols);
+        // Send
+        ByteBuf output = inputBuffer == null ? Unpooled.buffer() : inputBuffer.alloc().buffer();
+        writeToBuffer(output);
+
+        return output;
+    }
+
+    /**
+     * Send this packet to the associated user.
+     * Be careful not to send packets twice.
+     * (Sends it after current)
+     *
+     * @param packetProtocol - The protocol version of the packet.
+     * @throws Exception if it fails to write
+     */
+    public void send(Class<? extends Protocol> packetProtocol) throws Exception {
+        send(packetProtocol, true);
+    }
+
+    /**
+     * Send this packet to the associated user.
+     * Be careful not to send packets twice.
+     * (Sends it after current)
+     * Also returns the packets ChannelFuture
+     *
+     * @param packetProtocol - The protocol version of the packet.
+     * @return The packets ChannelFuture
+     * @throws Exception if it fails to write
+     */
+    public ChannelFuture sendFuture(Class<? extends Protocol> packetProtocol) throws Exception {
+        if (!isCancelled()) {
+            ByteBuf output = constructPacket(packetProtocol, true);
+            return user().sendRawPacketFuture(output);
+        }
+        return user().getChannel().newFailedFuture(new Exception("Cancelled packet"));
+    }
+
+    /**
+     * Send this packet to the associated user.
+     * Be careful not to send packets twice.
+     * (Sends it after current)
+     * <b>This method is no longer used, it's favoured to use {@link #send(Class)} as it will handle the pipeline properly.</b>
+     *
+     * @throws Exception if it fails to write
+     */
+    @Deprecated
+    public void send() throws Exception {
+        if (!isCancelled()) {
+            // Send
+            ByteBuf output = inputBuffer == null ? Unpooled.buffer() : inputBuffer.alloc().buffer();
+            writeToBuffer(output);
+            user().sendRawPacket(output);
+        }
+    }
+
+    /**
+     * Create a new packet for the target of this packet.
+     *
+     * @param packetID The ID of the new packet
+     * @return The newly created packet wrapper
+     */
+    public PacketWrapper create(int packetID) {
+        return new PacketWrapper(packetID, null, user());
+    }
+
+    /**
+     * Create a new packet with values.
+     *
+     * @param packetID The ID of the new packet
+     * @param init     A ValueCreator to write to the packet.
+     * @return The newly created packet wrapper
+     * @throws Exception If it failed to write the values from the ValueCreator.
+     */
+    public PacketWrapper create(int packetID, ValueCreator init) throws Exception {
+        PacketWrapper wrapper = create(packetID);
+        init.write(wrapper);
+        return wrapper;
+    }
+
+    /**
+     * Applies a pipeline from an index to the wrapper
+     *
+     * @param direction The direction
+     * @param state     The state
+     * @param index     The index to start from
+     * @param pipeline  The pipeline
+     * @return The current packetwrapper
+     * @throws Exception If it fails to transform a packet, exception will be thrown
+     */
+    public PacketWrapper apply(Direction direction, State state, int index, List<Protocol> pipeline) throws Exception {
+        for (int i = index; i < pipeline.size(); i++) { // Copy to prevent from removal.
+            pipeline.get(i).transform(direction, state, this);
+            // Reset the reader for the packetWrapper (So it can be recycled across packets)
+            resetReader();
+        }
+
+        return this;
+    }
+
+    /**
+     * Cancel this packet from sending
+     */
+    public void cancel() {
+        this.send = false;
+    }
+
+    /**
+     * Check if this packet is cancelled.
+     *
+     * @return True if the packet won't be sent.
+     */
+    public boolean isCancelled() {
+        return !this.send;
+    }
+
+    /**
+     * Get the user associated with this Packet
+     *
+     * @return The user
+     */
+    public UserConnection user() {
+        return this.userConnection;
+    }
+
+    /**
+     * Reset the reader, so that it can be read again.
+     */
+    public void resetReader() {
+        // Move readable objects are packet values
+        this.packetValues.addAll(readableObjects);
+        this.readableObjects.clear();
+        // Move all packet values to the readable for next packet.
+        this.readableObjects.addAll(packetValues);
+        this.packetValues.clear();
+    }
+
+    /**
+     * Send the current packet to the server.
+     * (Ensure the ID is suitable for viaversion)
+     *
+     * @throws Exception If it failed to write
+     */
+    public void sendToServer() throws Exception {
+        if (!isCancelled()) {
+            ByteBuf output = inputBuffer == null ? Unpooled.buffer() : inputBuffer.alloc().buffer();
+            writeToBuffer(output);
+
+            user().getChannel().pipeline().context(Via.getManager().getInjector().getDecoderName()).fireChannelRead(output);
+        }
+    }
+
+    @Override
+    public String toString() {
+        return "PacketWrapper{" +
+                "packetValues=" + packetValues +
+                ", readableObjects=" + readableObjects +
+                ", id=" + id +
+                '}';
+    }
+}

common/src/main/java/us/myles/ViaVersion/api/Pair.java

@@ -0,0 +1,23 @@
+package us.myles.ViaVersion.api;
+
+import lombok.EqualsAndHashCode;
+import lombok.Getter;
+import lombok.Setter;
+
+@Getter
+@Setter
+@EqualsAndHashCode
+public class Pair<X, Y> {
+    private X key;
+    private Y value;
+
+    public Pair(X key, Y value) {
+        this.key = key;
+        this.value = value;
+    }
+
+    @Override
+    public String toString() {
+        return "Pair{" + key + ", " + value + '}';
+    }
+}

common/src/main/java/us/myles/ViaVersion/api/Via.java

@@ -0,0 +1,45 @@
+package us.myles.ViaVersion.api;
+
+import com.google.common.base.Preconditions;
+import lombok.Getter;
+import us.myles.ViaVersion.ViaManager;
+import us.myles.ViaVersion.api.platform.ViaPlatform;
+
+public class Via {
+    @Getter
+    private static ViaPlatform platform;
+    @Getter
+    private static ViaManager manager;
+
+    /**
+     * Register the ViaManager associated with the platform.
+     *
+     * @param viaManager The ViaManager
+     */
+    public static void init(ViaManager viaManager) {
+        Preconditions.checkArgument(manager == null, "ViaManager is already set");
+
+        Via.platform = viaManager.getPlatform();
+        Via.manager = viaManager;
+    }
+
+    /**
+     * Get the API associated with the current platform.
+     *
+     * @return API instance
+     */
+    public static ViaAPI getAPI() {
+        Preconditions.checkArgument(platform != null, "ViaVersion has not loaded the Platform");
+        return Via.platform.getApi();
+    }
+
+    /**
+     * Get the config associated with the current platform.
+     *
+     * @return Config instance
+     */
+    public static ViaVersionConfig getConfig() {
+        Preconditions.checkArgument(platform != null, "ViaVersion has not loaded the Platform");
+        return Via.platform.getConf();
+    }
+}

common/src/main/java/us/myles/ViaVersion/api/ViaAPI.java

@@ -0,0 +1,99 @@
+package us.myles.ViaVersion.api;
+
+import io.netty.buffer.ByteBuf;
+import us.myles.ViaVersion.api.boss.BossBar;
+import us.myles.ViaVersion.api.boss.BossColor;
+import us.myles.ViaVersion.api.boss.BossStyle;
+import us.myles.ViaVersion.api.protocol.ProtocolRegistry;
+
+import java.util.SortedSet;
+import java.util.UUID;
+
+/**
+ * Represents the ViaAPI
+ *
+ * @param <T> The player type for the specific platform, for bukkit it's {@code ViaAPI<Player>}
+ */
+public interface ViaAPI<T> {
+    /**
+     * Get protocol number from a player
+     * Will also retrieve version from ProtocolSupport if it's being used.
+     *
+     * @param player Platform player object, eg. Bukkit this is Player
+     * @return Protocol ID, For example (47=1.8-1.8.8, 107=1.9, 108=1.9.1)
+     */
+    int getPlayerVersion(T player);
+
+    /**
+     * Get protocol number from a player
+     *
+     * @param uuid UUID of a player
+     * @return Protocol ID, For example (47=1.8-1.8.8, 107=1.9, 108=1.9.1)
+     */
+    int getPlayerVersion(UUID uuid);
+
+    /**
+     * Is player using 1.9?
+     *
+     * @param playerUUID UUID of a player
+     * @return True if the client is on 1.9
+     * @deprecated As of 0.9.9, because all players are ported use {@link #getPlayerVersion(UUID)}
+     */
+    @Deprecated
+    boolean isPorted(UUID playerUUID);
+
+    /**
+     * Get the version of the plugin
+     *
+     * @return Plugin version
+     */
+    String getVersion();
+
+    /**
+     * Send a raw packet to the player (Use new IDs)
+     *
+     * @param player Platform player object, eg. Bukkit this is Player
+     * @param packet The packet, you need a VarInt ID then the packet contents.
+     * @throws IllegalArgumentException If not on 1.9 throws IllegalArg
+     */
+    void sendRawPacket(T player, ByteBuf packet) throws IllegalArgumentException;
+
+    /**
+     * Send a raw packet to the player (Use new IDs)
+     *
+     * @param uuid   The uuid from the player to send packet
+     * @param packet The packet, you need a VarInt ID then the packet contents.
+     * @throws IllegalArgumentException If not on 1.9 throws IllegalArg
+     */
+    void sendRawPacket(UUID uuid, ByteBuf packet) throws IllegalArgumentException;
+
+    /**
+     * Create a new bossbar instance
+     *
+     * @param title The title
+     * @param color The color
+     * @param style The style
+     * @return BossBar instance
+     */
+    BossBar createBossBar(String title, BossColor color, BossStyle style);
+
+    /**
+     * Create a new bossbar instance
+     *
+     * @param title  The title
+     * @param health Number between 0 and 1
+     * @param color  The color
+     * @param style  The style
+     * @return BossBar instance
+     */
+    BossBar createBossBar(String title, float health, BossColor color, BossStyle style);
+
+    /**
+     * Get the supported protocol versions
+     * This method removes any blocked protocol versions.
+     *
+     * @return a list of protocol versions
+     * @see ProtocolRegistry#getSupportedVersions() for full list.
+     */
+    SortedSet<Integer> getSupportedVersions();
+}

common/src/main/java/us/myles/ViaVersion/api/ViaListener.java

@@ -0,0 +1,43 @@
+package us.myles.ViaVersion.api;
+
+import lombok.*;
+import us.myles.ViaVersion.api.data.UserConnection;
+import us.myles.ViaVersion.api.protocol.Protocol;
+import us.myles.ViaVersion.protocols.base.ProtocolInfo;
+
+import java.util.UUID;
+
+@Getter(AccessLevel.PROTECTED)
+@Setter(AccessLevel.PROTECTED)
+@RequiredArgsConstructor
+public abstract class ViaListener {
+    private final Class<? extends Protocol> requiredPipeline;
+    private boolean registered = false;
+
+    /**
+     * Get the UserConnection from an UUID
+     *
+     * @param uuid UUID object
+     * @return The UserConnection
+     */
+    protected UserConnection getUserConnection(@NonNull UUID uuid) {
+        return Via.getManager().getConnection(uuid);
+    }
+
+    /**
+     * Checks if the UUID is on the selected pipe
+     *
+     * @param uuid UUID Object
+     * @return True if on pipe
+     */
+    protected boolean isOnPipe(UUID uuid) {
+        UserConnection userConnection = getUserConnection(uuid);
+        return userConnection != null &&
+                userConnection.get(ProtocolInfo.class).getPipeline().contains(requiredPipeline);
+    }
+
+    /**
+     * Register the event
+     */
+    public abstract void register();
+}

common/src/main/java/us/myles/ViaVersion/api/ViaVersionConfig.java

@@ -0,0 +1,220 @@
+package us.myles.ViaVersion.api;
+
+import java.util.List;
+
+public interface ViaVersionConfig {
+
+    /**
+     * Get if the plugin should check for updates
+     *
+     * @return true if update checking is enabled
+     */
+    boolean isCheckForUpdates();
+
+    /**
+     * Get if collision preventing for players is enabled
+     *
+     * @return true if collision preventing is enabled
+     */
+    boolean isPreventCollision();
+
+    /**
+     * Get if 1.9 & 1.10 clients are shown the new effect indicator in the top-right corner
+     *
+     * @return true if the using of the new effect indicator is enabled
+     */
+    boolean isNewEffectIndicator();
+
+    /**
+     * Get if 1.9 & 1.10 clients are shown the new death message on the death screen
+     *
+     * @return true if enabled
+     */
+    boolean isShowNewDeathMessages();
+
+    /**
+     * Get if metadata errors will be suppressed
+     *
+     * @return true if metadata errors suppression is enabled
+     */
+    boolean isSuppressMetadataErrors();
+
+    /**
+     * Get if blocking in 1.9 & 1.10 appears as a player holding a shield
+     *
+     * @return true if shield blocking is enabled
+     */
+    boolean isShieldBlocking();
+
+    /**
+     * Get if armor stand positions are fixed so holograms show up at the correct height in 1.9 & 1.10
+     *
+     * @return true if hologram patching is enabled
+     */
+    boolean isHologramPatch();
+
+    /**
+     * Get if boss bars are fixed for 1.9 & 1.10 clients
+     *
+     * @return true if boss bar patching is enabled
+     */
+    boolean isBossbarPatch();
+
+    /**
+     * Get if the boss bars for 1.9 & 1.10 clients are being stopped from flickering
+     * This will keep all boss bars on 100% (not recommended)
+     *
+     * @return true if boss bar anti flickering is enabled
+     */
+    boolean isBossbarAntiflicker();
+
+    /**
+     * Get if unknown entity errors will be suppressed
+     *
+     * @return true if boss bar patching is enabled
+     */
+    @Deprecated
+    boolean isUnknownEntitiesSuppressed();
+
+    /**
+     * Get the vertical offset armor stands are being moved with when the hologram patch is enabled
+     *
+     * @return the vertical offset holograms will be moved with
+     */
+    double getHologramYOffset();
+
+    /**
+     * Get if players will be automatically put in the same team when collision preventing is enabled
+     *
+     * @return true if automatic teaming is enabled
+     */
+    boolean isAutoTeam();
+
+    /**
+     * Get if our block break patch is enabled to prevent weird ghost glitches.
+     *
+     * @return true if it is enabled.
+     */
+    @Deprecated
+    boolean isBlockBreakPatch();
+
+    /**
+     * Get the maximum number of packets a client can send per second.
+     *
+     * @return The number of packets a client can send per second.
+     */
+    int getMaxPPS();
+
+    /**
+     * Get the kick message sent if the user hits the max packets per second.
+     *
+     * @return Kick message, with colour codes using '&'
+     */
+    String getMaxPPSKickMessage();
+
+    /**
+     * The time in seconds that should be tracked for warnings
+     *
+     * @return Time in seconds that should be tracked for warnings
+     */
+    int getTrackingPeriod();
+
+    /**
+     * The number of packets per second to count as a warning
+     *
+     * @return The number of packets per second to count as a warning.
+     */
+    int getWarningPPS();
+
+    /**
+     * Get the maximum number of warnings the client can have in the interval
+     *
+     * @return The number of packets a client can send per second.
+     */
+    int getMaxWarnings();
+
+    /**
+     * Get the kick message sent if the user goes over the warnings in the interval
+     *
+     * @return Kick message, with colour codes using '&'
+     */
+    String getMaxWarningsKickMessage();
+
+    /**
+     * Is anti-xray enabled?
+     *
+     * @return A boolean
+     */
+    boolean isAntiXRay();
+
+    /**
+     * Send supported versions in the status response packet
+     *
+     * @return If true, enabled
+     */
+    boolean isSendSupportedVersions();
+
+    /**
+     * Stimulate the player tick
+     *
+     * @return if true, enabled
+     */
+    boolean isStimulatePlayerTick();
+
+    /**
+     * Use the item cache to prevent high resource usage
+     *
+     * @return if true, enabled
+     */
+    boolean isItemCache();
+
+    /**
+     * Use the NMS player ticking
+     *
+     * @return if true, enabled
+     */
+    boolean isNMSPlayerTicking();
+
+    /**
+     * Replace extended pistons on 1.10 chunk loading.
+     *
+     * @return True if to replace them
+     */
+    boolean isReplacePistons();
+
+    /**
+     * Get the id for replacing extended pistons.
+     *
+     * @return The integer id
+     */
+    int getPistonReplacementId();
+
+    /**
+     * Force json transform
+     *
+     * @return True if enabled
+     */
+    boolean isForceJsonTransform();
+
+    /**
+     * Get the blocked protocols
+     *
+     * @return An Integer list
+     */
+    List<Integer> getBlockedProtocols();
+
+    /**
+     * Get the custom disconnect message
+     *
+     * @return Disconnect message
+     */
+    String getBlockedDisconnectMsg();
+
+    /**
+     * Get the message sent to players being kicked on reload.
+     * Players are kicked to stop the server crashing
+     *
+     * @return Disconnect message
+     */
+    String getReloadDisconnectMsg();
+}

common/src/main/java/us/myles/ViaVersion/api/boss/BossBar.java

@@ -0,0 +1,170 @@
+package us.myles.ViaVersion.api.boss;
+
+import us.myles.ViaVersion.api.Via;
+
+import java.util.Set;
+import java.util.UUID;
+
+public abstract class BossBar<T> {
+    /**
+     * Get the current title
+     *
+     * @return the title
+     */
+    public abstract String getTitle();
+
+    /**
+     * Change the title
+     *
+     * @param title Title can be in either JSON or just text
+     * @return The BossBar object
+     */
+    public abstract BossBar setTitle(String title);
+
+    /**
+     * Get the health
+     *
+     * @return float between 0F - 1F
+     */
+    public abstract float getHealth();
+
+    /**
+     * Change the health
+     *
+     * @param health this float has to be between 0F - 1F
+     * @return The BossBar object
+     */
+    public abstract BossBar setHealth(float health);
+
+    /**
+     * Get the bossbar color
+     *
+     * @return The colour
+     */
+    public abstract BossColor getColor();
+
+    /**
+     * Yay colors!
+     *
+     * @param color Whatever color you want!
+     * @return The BossBar object
+     */
+    public abstract BossBar setColor(BossColor color);
+
+    /**
+     * Get the bosbar style
+     *
+     * @return BossStyle
+     */
+    public abstract BossStyle getStyle();
+
+    /**
+     * Change the bosbar style
+     *
+     * @param style BossStyle
+     * @return The BossBar object
+     */
+    public abstract BossBar setStyle(BossStyle style);
+
+    /**
+     * Show the bossbar to a player.
+     *
+     * @param player The player
+     * @return The BossBar object
+     * @deprecated Deprecated use UUID's instead of Player objects {@link #addPlayer(UUID)}
+     */
+    @Deprecated
+    public BossBar addPlayer(T player) {
+        throw new UnsupportedOperationException("This method is not implemented for the platform " + Via.getPlatform().getPlatformName());
+    }
+
+    /**
+     * Show the bossbar to a player (uuid)
+     *
+     * @param player uuid of the player
+     * @return The BossBar object
+     */
+    public abstract BossBar addPlayer(UUID player);
+
+    /**
+     * add multiple players
+     *
+     * @param players list of players
+     * @return The BossBar object
+     * @deprecated Deprecated use UUID's instead of Player objects {@link #addPlayer(UUID)}
+     */
+    @Deprecated
+    public BossBar addPlayers(T... players) {
+        throw new UnsupportedOperationException("This method is not implemented for the platform " + Via.getPlatform().getPlatformName());
+    }
+
+    /**
+     * Remove the bossbar from a player
+     *
+     * @param player The player
+     * @return The BossBar object
+     * @deprecated Deprecated use UUID's instead of Player objects {@link #removePlayer(UUID)}
+     */
+    @Deprecated
+    public BossBar removePlayer(T player) {
+        throw new UnsupportedOperationException("This method is not implemented for the platform " + Via.getPlatform().getPlatformName());
+    }
+
+    /**
+     * Removes the bossbar from a player
+     *
+     * @param uuid The platers YYUD
+     * @return The BossBar object
+     */
+    public abstract BossBar removePlayer(UUID uuid);
+
+    /**
+     * Add flags
+     *
+     * @param flag The flag to add
+     * @return The BossBar object
+     */
+    public abstract BossBar addFlag(BossFlag flag);
+
+    /**
+     * Remove flags.
+     *
+     * @param flag The flag to remove
+     * @return The BossBar object
+     */
+    public abstract BossBar removeFlag(BossFlag flag);
+
+    /**
+     * @param flag The flag to check against
+     * @return True if it has the flag
+     */
+    public abstract boolean hasFlag(BossFlag flag);
+
+    /**
+     * Get players
+     *
+     * @return UUIDS from players (sorry I lied)
+     */
+    public abstract Set<UUID> getPlayers();
+
+    /**
+     * Show the bossbar to everyone (In the getPlayer set)
+     *
+     * @return The BossBar object
+     */
+    public abstract BossBar show();
+
+    /**
+     * Hide the bossbar from everyone (In the getPlayer set)
+     *
+     * @return The BossBar object
+     */
+    public abstract BossBar hide();
+
+    /**
+     * Is it visible?
+     *
+     * @return visibility changable with show() and hide()
+     */
+    public abstract boolean isVisible();
+}

common/src/main/java/us/myles/ViaVersion/api/boss/BossColor.java

@@ -0,0 +1,18 @@
+package us.myles.ViaVersion.api.boss;
+
+import lombok.Getter;
+import lombok.RequiredArgsConstructor;
+
+@RequiredArgsConstructor
+@Getter
+public enum BossColor {
+    PINK(0),
+    BLUE(1),
+    RED(2),
+    GREEN(3),
+    YELLOW(4),
+    PURPLE(5),
+    WHITE(6);
+
+    private final int id;
+}

common/src/main/java/us/myles/ViaVersion/api/boss/BossFlag.java

@@ -0,0 +1,13 @@
+package us.myles.ViaVersion.api.boss;
+
+import lombok.Getter;
+import lombok.RequiredArgsConstructor;
+
+@RequiredArgsConstructor
+@Getter
+public enum BossFlag {
+    DARKEN_SKY(1),
+    PLAY_BOSS_MUSIC(2);
+
+    private final int id;
+}

common/src/main/java/us/myles/ViaVersion/api/boss/BossStyle.java

@@ -0,0 +1,16 @@
+package us.myles.ViaVersion.api.boss;
+
+import lombok.Getter;
+import lombok.RequiredArgsConstructor;
+
+@RequiredArgsConstructor
+@Getter
+public enum BossStyle {
+    SOLID(0),
+    SEGMENTED_6(1),
+    SEGMENTED_10(2),
+    SEGMENTED_12(3),
+    SEGMENTED_20(4);
+
+    private final int id;
+}

common/src/main/java/us/myles/ViaVersion/api/command/ViaCommandSender.java

@@ -0,0 +1,34 @@
+package us.myles.ViaVersion.api.command;
+
+import java.util.UUID;
+
+public interface ViaCommandSender {
+    /**
+     * Check if the sender has a permission.
+     *
+     * @param permission Permission string eg. viaversion.admin
+     * @return True if the sender has the permission
+     */
+    boolean hasPermission(String permission);
+
+    /**
+     * Send a message to the sender
+     *
+     * @param msg The message to send
+     */
+    void sendMessage(String msg);
+
+    /**
+     * Get the senders UUID.
+     *
+     * @return The senders UUID
+     */
+    UUID getUUID();
+
+    /**
+     * Get the senders name.
+     *
+     * @return The senders name
+     */
+    String getName();
+}

common/src/main/java/us/myles/ViaVersion/api/command/ViaSubCommand.java

@@ -0,0 +1,76 @@
+package us.myles.ViaVersion.api.command;
+
+import us.myles.ViaVersion.commands.ViaCommandHandler;
+
+import java.util.Collections;
+import java.util.List;
+
+public abstract class ViaSubCommand {
+    /**
+     * Subcommand name
+     *
+     * @return The commands name
+     */
+    public abstract String name();
+
+    /**
+     * subcommand description, this'll show in /viaversion list
+     *
+     * @return The commands description
+     */
+    public abstract String description();
+
+    /**
+     * Usage example:
+     * "playerversion [name]"
+     *
+     * @return The commands usage
+     */
+    public String usage() {
+        return name();
+    }
+
+    /**
+     * Permission, null for everyone
+     *
+     * @return The permission required to use the commands
+     */
+    public String permission() {
+        return "viaversion.admin";
+    }
+
+    /**
+     * Gets triggered on execution
+     *
+     * @param sender Command sender
+     * @param args   Arguments
+     * @return commands executed succesfully if false, show usage
+     */
+    public abstract boolean execute(ViaCommandSender sender, String[] args);
+
+    /**
+     * Yay, possibility to implement tab-completion
+     *
+     * @param sender Command sender
+     * @param args   args
+     * @return tab complete possibilities
+     */
+    public List<String> onTabComplete(ViaCommandSender sender, String[] args) {
+        return Collections.emptyList();
+    }
+
+    public String color(String s) {
+        return ViaCommandHandler.color(s);
+    }
+
+    /**
+     * Send message formatted / colored
+     *
+     * @param sender  commands sender
+     * @param message string message
+     * @param args    optional objects
+     */
+    public void sendMessage(ViaCommandSender sender, String message, Object... args) {
+        ViaCommandHandler.sendMessage(sender, message, args);
+    }
+}

common/src/main/java/us/myles/ViaVersion/api/command/ViaVersionCommand.java

@@ -0,0 +1,47 @@
+package us.myles.ViaVersion.api.command;
+
+import java.util.List;
+
+public interface ViaVersionCommand {
+    /**
+     * Register your own subcommand inside ViaVersion
+     *
+     * @param command Your own SubCommand instance to handle it.
+     * @throws Exception throws an exception when the subcommand already exists or if it's not valid, example: spacee
+     */
+    void registerSubCommand(ViaSubCommand command) throws Exception;
+
+    /**
+     * Check if a subcommand is registered.
+     *
+     * @param name Subcommand name
+     * @return true if it exists
+     */
+    boolean hasSubCommand(String name);
+
+    /**
+     * Get subcommand instance by name
+     *
+     * @param name subcommand name
+     * @return ViaSubCommand instance
+     */
+    ViaSubCommand getSubCommand(String name);
+
+    /**
+     * Executed when the Command sender executes the commands
+     *
+     * @param sender Sender object
+     * @param args   arguments provided
+     * @return was successful
+     */
+    boolean onCommand(ViaCommandSender sender, String[] args);
+
+    /**
+     * Executed when the Command sender tab-completes
+     *
+     * @param sender Sender object
+     * @param args   arguments provided
+     * @return was successful
+     */
+    List<String> onTabComplete(ViaCommandSender sender, String[] args);
+}

common/src/main/java/us/myles/ViaVersion/api/configuration/ConfigurationProvider.java

@@ -0,0 +1,31 @@
+package us.myles.ViaVersion.api.configuration;
+
+import java.util.Map;
+
+public interface ConfigurationProvider {
+
+    /**
+     * Sets the specified path to the given value.
+     *
+     * @param path  Path of the object to set.
+     * @param value New value to set the path to
+     */
+    void set(String path, Object value);
+
+    /**
+     * Saves the config
+     */
+    void saveConfig();
+
+    /**
+     * Reloads the config
+     */
+    void reloadConfig();
+
+    /**
+     * Get all the configuration values
+     *
+     * @return Map with key-values
+     */
+    Map<String, Object> getValues();
+}

common/src/main/java/us/myles/ViaVersion/api/data/StoredObject.java

@@ -0,0 +1,10 @@
+package us.myles.ViaVersion.api.data;
+
+import lombok.AllArgsConstructor;
+import lombok.Getter;
+
+@Getter
+@AllArgsConstructor
+public class StoredObject {
+    private UserConnection user;
+}

common/src/main/java/us/myles/ViaVersion/api/data/UserConnection.java

@@ -0,0 +1,198 @@
+package us.myles.ViaVersion.api.data;
+
+import io.netty.buffer.ByteBuf;
+import io.netty.channel.ChannelFuture;
+import io.netty.channel.ChannelHandler;
+import io.netty.channel.socket.SocketChannel;
+import lombok.Data;
+import net.md_5.bungee.api.ChatColor;
+import us.myles.ViaVersion.api.Via;
+import us.myles.ViaVersion.api.ViaVersionConfig;
+import us.myles.ViaVersion.protocols.base.ProtocolInfo;
+
+import java.util.Map;
+import java.util.UUID;
+import java.util.concurrent.ConcurrentHashMap;
+
+@Data
+public class UserConnection {
+    private final SocketChannel channel;
+    Map<Class, StoredObject> storedObjects = new ConcurrentHashMap<>();
+    private boolean active = true;
+    private boolean pendingDisconnect = false;
+    private Object lastPacket;
+    private long sentPackets = 0L;
+    private long receivedPackets = 0L;
+    // Used for tracking pps
+    private long startTime = 0L;
+    private long intervalPackets = 0L;
+    private long packetsPerSecond = -1L;
+    // Used for handling warnings (over time)
+    private int secondsObserved = 0;
+    private int warnings = 0;
+
+
+    public UserConnection(SocketChannel socketChannel) {
+        this.channel = socketChannel;
+    }
+
+    /**
+     * Get an object from the storage
+     *
+     * @param objectClass The class of the object to get
+     * @param <T>         The type of the class you want to get.
+     * @return The requested object
+     */
+    public <T extends StoredObject> T get(Class<T> objectClass) {
+        return (T) storedObjects.get(objectClass);
+    }
+
+    /**
+     * Check if the storage has an object
+     *
+     * @param objectClass The object class to check
+     * @return True if the object is in the storage
+     */
+    public boolean has(Class<? extends StoredObject> objectClass) {
+        return storedObjects.containsKey(objectClass);
+    }
+
+    /**
+     * Put an object into the stored objects based on class
+     *
+     * @param object The object to store.
+     */
+    public void put(StoredObject object) {
+        storedObjects.put(object.getClass(), object);
+    }
+
+    /**
+     * Clear all the stored objects
+     * Used for bungee when switching servers.
+     */
+    public void clearStoredObjects() {
+        storedObjects.clear();
+    }
+
+    /**
+     * Send a raw packet to the player
+     *
+     * @param packet        The raw packet to send
+     * @param currentThread Should it run in the same thread
+     */
+    public void sendRawPacket(final ByteBuf packet, boolean currentThread) {
+        final ChannelHandler handler = channel.pipeline().get(Via.getManager().getInjector().getEncoderName());
+        if (currentThread) {
+            channel.pipeline().context(handler).writeAndFlush(packet);
+        } else {
+            channel.eventLoop().submit(new Runnable() {
+                @Override
+                public void run() {
+                    channel.pipeline().context(handler).writeAndFlush(packet);
+                }
+            });
+        }
+    }
+
+    /**
+     * Send a raw packet to the player with returning the future
+     *
+     * @param packet The raw packet to send
+     * @return ChannelFuture of the packet being sent
+     */
+    public ChannelFuture sendRawPacketFuture(final ByteBuf packet) {
+        final ChannelHandler handler = channel.pipeline().get(Via.getManager().getInjector().getEncoderName());
+        return channel.pipeline().context(handler).writeAndFlush(packet);
+    }
+
+    /**
+     * Send a raw packet to the player (netty thread)
+     *
+     * @param packet The packet to send
+     */
+    public void sendRawPacket(final ByteBuf packet) {
+        sendRawPacket(packet, false);
+    }
+
+    /**
+     * Used for incrementing the number of packets sent to the client
+     */
+    public void incrementSent() {
+        this.sentPackets++;
+    }
+
+    /**
+     * Used for incrementing the number of packets received from the client
+     *
+     * @return True if the interval has reset
+     */
+    public boolean incrementReceived() {
+        // handle stats
+        Long diff = System.currentTimeMillis() - startTime;
+        if (diff >= 1000) {
+            packetsPerSecond = intervalPackets;
+            startTime = System.currentTimeMillis();
+            intervalPackets = 1;
+            return true;
+        } else {
+            intervalPackets++;
+        }
+        // increase total
+        this.receivedPackets++;
+        return false;
+    }
+
+    public boolean handlePPS() {
+        ViaVersionConfig conf = Via.getConfig();
+        // Max PPS Checker
+        if (conf.getMaxPPS() > 0) {
+            if (getPacketsPerSecond() >= conf.getMaxPPS()) {
+                disconnect(conf.getMaxPPSKickMessage().replace("%pps", ((Long) getPacketsPerSecond()).intValue() + ""));
+                return true; // don't send current packet
+            }
+        }
+
+        // Tracking PPS Checker
+        if (conf.getMaxWarnings() > 0 && conf.getTrackingPeriod() > 0) {
+            if (getSecondsObserved() > conf.getTrackingPeriod()) {
+                // Reset
+                setWarnings(0);
+                setSecondsObserved(1);
+            } else {
+                setSecondsObserved(getSecondsObserved() + 1);
+                if (getPacketsPerSecond() >= conf.getWarningPPS()) {
+                    setWarnings(getWarnings() + 1);
+                }
+
+                if (getWarnings() >= conf.getMaxWarnings()) {
+                    disconnect(conf.getMaxWarningsKickMessage().replace("%pps", ((Long) getPacketsPerSecond()).intValue() + ""));
+                    return true; // don't send current packet
+                }
+            }
+        }
+        return false;
+    }
+
+    /**
+     * Disconnect a connection
+     *
+     * @param reason The reason to use, not used if player is not active.
+     */
+    public void disconnect(final String reason) {
+        if (!getChannel().isOpen()) return;
+        if (pendingDisconnect) return;
+        pendingDisconnect = true;
+        if (get(ProtocolInfo.class).getUuid() != null) {
+            final UUID uuid = get(ProtocolInfo.class).getUuid();
+            Via.getPlatform().runSync(new Runnable() {
+                @Override
+                public void run() {
+                    if (!Via.getPlatform().kickPlayer(uuid, ChatColor.translateAlternateColorCodes('&', reason))) {
+                        getChannel().close(); // =)
+                    }
+                }
+            });
+        }
+
+    }
+}

common/src/main/java/us/myles/ViaVersion/api/entities/Entity1_10Types.java

@@ -0,0 +1,187 @@
+package us.myles.ViaVersion.api.entities;
+
+import com.google.common.base.Optional;
+import lombok.AllArgsConstructor;
+import lombok.Getter;
+import us.myles.ViaVersion.api.Via;
+
+// 1.10 Entity / Object ids
+public class Entity1_10Types {
+
+    public static EntityType getTypeFromId(int typeID, boolean isObject) {
+        Optional<EntityType> type;
+
+        if (isObject)
+            type = ObjectTypes.getPCEntity(typeID);
+        else
+            type = EntityType.findById(typeID);
+
+        if (!type.isPresent()) {
+            Via.getPlatform().getLogger().severe("Could not find type id " + typeID + " isObject=" + isObject);
+            return EntityType.ENTITY; // Fall back to the basic ENTITY
+        }
+
+        return type.get();
+    }
+
+    @AllArgsConstructor
+    @Getter
+    public enum EntityType {
+        ENTITY(-1),
+        DROPPED_ITEM(1, EntityType.ENTITY),
+        EXPERIENCE_ORB(2, EntityType.ENTITY),
+        LEASH_HITCH(8, EntityType.ENTITY), // Actually entity hanging but it doesn't make a lot of difference for metadata
+        PAINTING(9, EntityType.ENTITY), // Actually entity hanging but it doesn't make a lot of difference for metadata
+        ARROW(10, EntityType.ENTITY),
+        SNOWBALL(11, EntityType.ENTITY), // Actually EntityProjectile
+        FIREBALL(12, EntityType.ENTITY),
+        SMALL_FIREBALL(13, EntityType.ENTITY),
+        ENDER_PEARL(14, EntityType.ENTITY), // Actually EntityProjectile
+        ENDER_SIGNAL(15, EntityType.ENTITY),
+        THROWN_EXP_BOTTLE(17, EntityType.ENTITY),
+        ITEM_FRAME(18, EntityType.ENTITY), // Actually EntityHanging
+        WITHER_SKULL(19, EntityType.ENTITY),
+        PRIMED_TNT(20, EntityType.ENTITY),
+        FALLING_BLOCK(21, EntityType.ENTITY),
+        FIREWORK(22, EntityType.ENTITY),
+        TIPPED_ARROW(23, EntityType.ARROW),
+        SPECTRAL_ARROW(24, EntityType.ARROW),
+        SHULKER_BULLET(25, EntityType.ENTITY),
+        DRAGON_FIREBALL(26, EntityType.FIREBALL),
+
+        ENTITY_LIVING(-1, ENTITY),
+        ENTITY_INSENTIENT(-1, ENTITY_LIVING),
+        ENTITY_AGEABLE(-1, ENTITY_INSENTIENT),
+        ENTITY_TAMEABLE_ANIMAL(-1, ENTITY_AGEABLE),
+        ENTITY_HUMAN(-1, ENTITY_LIVING),
+
+        ARMOR_STAND(30, EntityType.ENTITY_LIVING),
+
+        // Vehicles
+        MINECART_ABSTRACT(-1, ENTITY),
+        MINECART_COMMAND(40, MINECART_ABSTRACT),
+        BOAT(41, ENTITY),
+        MINECART_RIDEABLE(42, MINECART_ABSTRACT),
+        MINECART_CHEST(43, MINECART_ABSTRACT),
+        MINECART_FURNACE(44, MINECART_ABSTRACT),
+        MINECART_TNT(45, MINECART_ABSTRACT),
+        MINECART_HOPPER(46, MINECART_ABSTRACT),
+        MINECART_MOB_SPAWNER(47, MINECART_ABSTRACT),
+
+        CREEPER(50, ENTITY_INSENTIENT),
+        SKELETON(51, ENTITY_INSENTIENT),
+        SPIDER(52, ENTITY_INSENTIENT),
+        GIANT(53, ENTITY_INSENTIENT),
+        ZOMBIE(54, ENTITY_INSENTIENT),
+        SLIME(55, ENTITY_INSENTIENT),
+        GHAST(56, ENTITY_INSENTIENT),
+        PIG_ZOMBIE(57, ZOMBIE),
+        ENDERMAN(58, ENTITY_INSENTIENT),
+        CAVE_SPIDER(59, SPIDER),
+        SILVERFISH(60, ENTITY_INSENTIENT),
+        BLAZE(61, ENTITY_INSENTIENT),
+        MAGMA_CUBE(62, SLIME),
+        ENDER_DRAGON(63, ENTITY_INSENTIENT),
+        WITHER(64, ENTITY_INSENTIENT),
+        BAT(65, ENTITY_INSENTIENT),
+        WITCH(66, ENTITY_INSENTIENT),
+        ENDERMITE(67, ENTITY_INSENTIENT),
+        GUARDIAN(68, ENTITY_INSENTIENT),
+        IRON_GOLEM(99, ENTITY_INSENTIENT), // moved up to avoid illegal forward references
+        SHULKER(69, EntityType.IRON_GOLEM),
+        PIG(90, ENTITY_AGEABLE),
+        SHEEP(91, ENTITY_AGEABLE),
+        COW(92, ENTITY_AGEABLE),
+        CHICKEN(93, ENTITY_AGEABLE),
+        SQUID(94, ENTITY_INSENTIENT),
+        WOLF(95, ENTITY_TAMEABLE_ANIMAL),
+        MUSHROOM_COW(96, COW),
+        SNOWMAN(97, EntityType.IRON_GOLEM),
+        OCELOT(98, ENTITY_TAMEABLE_ANIMAL),
+        HORSE(100, ENTITY_AGEABLE),
+        RABBIT(101, ENTITY_AGEABLE),
+        POLAR_BEAR(102, ENTITY_AGEABLE),
+        VILLAGER(120, ENTITY_AGEABLE),
+        ENDER_CRYSTAL(200, ENTITY),
+        SPLASH_POTION(-1, ENTITY),
+        LINGERING_POTION(-1, SPLASH_POTION),
+        AREA_EFFECT_CLOUD(-1, ENTITY),
+        EGG(-1, ENTITY),
+        FISHING_HOOK(-1, ENTITY),
+        LIGHTNING(-1, ENTITY),
+        WEATHER(-1, ENTITY),
+        PLAYER(-1, ENTITY_HUMAN),
+        COMPLEX_PART(-1, ENTITY);
+
+        private final int id;
+        private final EntityType parent;
+
+        EntityType(int id) {
+            this.id = id;
+            this.parent = null;
+        }
+
+        public static Optional<EntityType> findById(int id) {
+            if (id == -1)  // Check if this is called
+                return Optional.absent();
+
+            for (EntityType ent : EntityType.values())
+                if (ent.getId() == id)
+                    return Optional.of(ent);
+
+            return Optional.absent();
+        }
+    }
+
+    @AllArgsConstructor
+    @Getter
+    public enum ObjectTypes {
+        BOAT(1, EntityType.BOAT),
+        ITEM(2, EntityType.DROPPED_ITEM),
+        AREA_EFFECT_CLOUD(3, EntityType.AREA_EFFECT_CLOUD),
+        MINECART(10, EntityType.MINECART_ABSTRACT),
+        TNT_PRIMED(50, EntityType.PRIMED_TNT),
+        ENDER_CRYSTAL(51, EntityType.ENDER_CRYSTAL),
+        TIPPED_ARROW(60, EntityType.TIPPED_ARROW),
+        SNOWBALL(61, EntityType.SNOWBALL),
+        EGG(62, EntityType.EGG),
+        FIREBALL(63, EntityType.FIREBALL),
+        SMALL_FIREBALL(64, EntityType.SMALL_FIREBALL),
+        ENDER_PEARL(65, EntityType.ENDER_PEARL),
+        WITHER_SKULL(66, EntityType.WITHER_SKULL),
+        SHULKER_BULLET(67, EntityType.SHULKER_BULLET),
+        FALLING_BLOCK(70, EntityType.FALLING_BLOCK),
+        ITEM_FRAME(71, EntityType.ITEM_FRAME),
+        ENDER_SIGNAL(72, EntityType.ENDER_SIGNAL),
+        POTION(73, EntityType.SPLASH_POTION),
+        THROWN_EXP_BOTTLE(75, EntityType.THROWN_EXP_BOTTLE),
+        FIREWORK(76, EntityType.FIREWORK),
+        LEASH(77, EntityType.LEASH_HITCH),
+        ARMOR_STAND(78, EntityType.ARMOR_STAND),
+        FISHIHNG_HOOK(90, EntityType.FISHING_HOOK),
+        SPECTRAL_ARROW(91, EntityType.SPECTRAL_ARROW),
+        DRAGON_FIREBALL(93, EntityType.DRAGON_FIREBALL);
+
+        private final int id;
+        private final EntityType type;
+
+        public static Optional<ObjectTypes> findById(int id) {
+            if (id == -1)
+                return Optional.absent();
+
+            for (ObjectTypes ent : ObjectTypes.values())
+                if (ent.getId() == id)
+                    return Optional.of(ent);
+
+            return Optional.absent();
+        }
+
+        public static Optional<EntityType> getPCEntity(int id) {
+            Optional<ObjectTypes> output = findById(id);
+
+            if (!output.isPresent())
+                return Optional.absent();
+            return Optional.of(output.get().getType());
+        }
+    }
+}

common/src/main/java/us/myles/ViaVersion/api/entities/Entity1_11Types.java

@@ -0,0 +1,241 @@
+package us.myles.ViaVersion.api.entities;
+
+import com.google.common.base.Optional;
+import lombok.AllArgsConstructor;
+import lombok.Getter;
+import us.myles.ViaVersion.api.Via;
+
+// 1.11 Entity / Object ids TODO maybe in the future instead of copying it, some api.
+public class Entity1_11Types {
+    public static EntityType getTypeFromId(int typeID, boolean isObject) {
+        Optional<EntityType> type;
+
+        if (isObject)
+            type = ObjectTypes.getPCEntity(typeID);
+        else
+            type = EntityType.findById(typeID);
+
+        if (!type.isPresent()) {
+            Via.getPlatform().getLogger().severe("Could not find type id " + typeID + " isObject=" + isObject);
+            return EntityType.ENTITY; // Fall back to the basic ENTITY
+        }
+
+        return type.get();
+    }
+
+    @AllArgsConstructor
+    @Getter
+    public enum EntityType {
+        ENTITY(-1),
+        DROPPED_ITEM(1, ENTITY),
+        EXPERIENCE_ORB(2, ENTITY),
+        LEASH_HITCH(8, ENTITY), // Actually entity hanging but it doesn't make a lot of difference for metadata
+        PAINTING(9, ENTITY), // Actually entity hanging but it doesn't make a lot of difference for metadata
+        ARROW(10, ENTITY),
+        SNOWBALL(11, ENTITY), // Actually EntityProjectile
+        FIREBALL(12, ENTITY),
+        SMALL_FIREBALL(13, ENTITY),
+        ENDER_PEARL(14, ENTITY), // Actually EntityProjectile
+        ENDER_SIGNAL(15, ENTITY),
+        THROWN_EXP_BOTTLE(17, ENTITY),
+        ITEM_FRAME(18, ENTITY), // Actually EntityHanging
+        WITHER_SKULL(19, ENTITY),
+        PRIMED_TNT(20, ENTITY),
+        FALLING_BLOCK(21, ENTITY),
+        FIREWORK(22, ENTITY),
+        TIPPED_ARROW(23, ARROW),
+        SPECTRAL_ARROW(24, ARROW),
+        SHULKER_BULLET(25, ENTITY),
+        DRAGON_FIREBALL(26, FIREBALL),
+        EVOCATION_FANGS(33, ENTITY),
+
+
+        ENTITY_LIVING(-1, ENTITY),
+        ENTITY_INSENTIENT(-1, ENTITY_LIVING),
+        ENTITY_AGEABLE(-1, ENTITY_INSENTIENT),
+        ENTITY_TAMEABLE_ANIMAL(-1, ENTITY_AGEABLE),
+        ENTITY_HUMAN(-1, ENTITY_LIVING),
+
+        ARMOR_STAND(30, ENTITY_LIVING),
+        EVOCATION_ILLAGER(34, ENTITY_INSENTIENT),
+        VEX(35, ENTITY_INSENTIENT),
+        VINDICATION_ILLAGER(36, ENTITY_INSENTIENT),
+
+        // Vehicles
+        MINECART_ABSTRACT(-1, ENTITY),
+        MINECART_COMMAND(40, MINECART_ABSTRACT),
+        BOAT(41, ENTITY),
+        MINECART_RIDEABLE(42, MINECART_ABSTRACT),
+        MINECART_CHEST(43, MINECART_ABSTRACT),
+        MINECART_FURNACE(44, MINECART_ABSTRACT),
+        MINECART_TNT(45, MINECART_ABSTRACT),
+        MINECART_HOPPER(46, MINECART_ABSTRACT),
+        MINECART_MOB_SPAWNER(47, MINECART_ABSTRACT),
+
+        CREEPER(50, ENTITY_INSENTIENT),
+
+        ABSTRACT_SKELETON(-1, ENTITY_INSENTIENT),
+        SKELETON(51, ABSTRACT_SKELETON),
+        WITHER_SKELETON(5, ABSTRACT_SKELETON),
+        STRAY(6, ABSTRACT_SKELETON),
+
+        SPIDER(52, ENTITY_INSENTIENT),
+        GIANT(53, ENTITY_INSENTIENT),
+
+        ZOMBIE(54, ENTITY_INSENTIENT),
+        HUSK(23, ZOMBIE),
+        ZOMBIE_VILLAGER(27, ZOMBIE),
+
+        SLIME(55, ENTITY_INSENTIENT),
+        GHAST(56, ENTITY_INSENTIENT),
+        PIG_ZOMBIE(57, ZOMBIE),
+        ENDERMAN(58, ENTITY_INSENTIENT),
+        CAVE_SPIDER(59, SPIDER),
+        SILVERFISH(60, ENTITY_INSENTIENT),
+        BLAZE(61, ENTITY_INSENTIENT),
+        MAGMA_CUBE(62, SLIME),
+        ENDER_DRAGON(63, ENTITY_INSENTIENT),
+        WITHER(64, ENTITY_INSENTIENT),
+        BAT(65, ENTITY_INSENTIENT),
+        WITCH(66, ENTITY_INSENTIENT),
+        ENDERMITE(67, ENTITY_INSENTIENT),
+
+        GUARDIAN(68, ENTITY_INSENTIENT),
+        ELDER_GUARDIAN(4, EntityType.GUARDIAN), // Moved down to avoid illegal forward reference
+
+        IRON_GOLEM(99, ENTITY_INSENTIENT), // moved up to avoid illegal forward references
+        SHULKER(69, EntityType.IRON_GOLEM),
+        PIG(90, ENTITY_AGEABLE),
+        SHEEP(91, ENTITY_AGEABLE),
+        COW(92, ENTITY_AGEABLE),
+        CHICKEN(93, ENTITY_AGEABLE),
+        SQUID(94, ENTITY_INSENTIENT),
+        WOLF(95, ENTITY_TAMEABLE_ANIMAL),
+        MUSHROOM_COW(96, COW),
+        SNOWMAN(97, EntityType.IRON_GOLEM),
+        OCELOT(98, ENTITY_TAMEABLE_ANIMAL),
+
+        ABSTRACT_HORSE(-1, ENTITY_AGEABLE),
+        HORSE(100, ABSTRACT_HORSE),
+        SKELETON_HORSE(28, ABSTRACT_HORSE),
+        ZOMBIE_HORSE(29, ABSTRACT_HORSE),
+
+        CHESTED_HORSE(-1, ABSTRACT_HORSE),
+        DONKEY(31, CHESTED_HORSE),
+        MULE(32, CHESTED_HORSE),
+        LIAMA(103, CHESTED_HORSE),
+
+
+        RABBIT(101, ENTITY_AGEABLE),
+        POLAR_BEAR(102, ENTITY_AGEABLE),
+        VILLAGER(120, ENTITY_AGEABLE),
+        ENDER_CRYSTAL(200, ENTITY),
+        SPLASH_POTION(-1, ENTITY),
+        LINGERING_POTION(-1, SPLASH_POTION),
+        AREA_EFFECT_CLOUD(-1, ENTITY),
+        EGG(-1, ENTITY),
+        FISHING_HOOK(-1, ENTITY),
+        LIGHTNING(-1, ENTITY),
+        WEATHER(-1, ENTITY),
+        PLAYER(-1, ENTITY_HUMAN),
+        COMPLEX_PART(-1, ENTITY),
+        LIAMA_SPIT(-1, ENTITY);
+
+        private final int id;
+        private final EntityType parent;
+
+        EntityType(int id) {
+            this.id = id;
+            this.parent = null;
+        }
+
+        public static Optional<EntityType> findById(int id) {
+            if (id == -1)  // Check if this is called
+                return Optional.absent();
+
+            for (EntityType ent : EntityType.values())
+                if (ent.getId() == id)
+                    return Optional.of(ent);
+
+            return Optional.absent();
+        }
+
+        public boolean is(EntityType... types) {
+            for (EntityType type : types)
+                if (is(type))
+                    return true;
+            return false;
+        }
+
+        public boolean is(EntityType type) {
+            return this == type;
+        }
+
+        public boolean isOrHasParent(EntityType type) {
+            EntityType parent = this;
+
+            do {
+                if (parent.equals(type))
+                    return true;
+
+                parent = parent.getParent();
+            } while (parent != null);
+
+            return false;
+        }
+    }
+
+    @AllArgsConstructor
+    @Getter
+    public enum ObjectTypes {
+        BOAT(1, EntityType.BOAT),
+        ITEM(2, EntityType.DROPPED_ITEM),
+        AREA_EFFECT_CLOUD(3, EntityType.AREA_EFFECT_CLOUD),
+        MINECART(10, EntityType.MINECART_ABSTRACT),
+        TNT_PRIMED(50, EntityType.PRIMED_TNT),
+        ENDER_CRYSTAL(51, EntityType.ENDER_CRYSTAL),
+        TIPPED_ARROW(60, EntityType.TIPPED_ARROW),
+        SNOWBALL(61, EntityType.SNOWBALL),
+        EGG(62, EntityType.EGG),
+        FIREBALL(63, EntityType.FIREBALL),
+        SMALL_FIREBALL(64, EntityType.SMALL_FIREBALL),
+        ENDER_PEARL(65, EntityType.ENDER_PEARL),
+        WITHER_SKULL(66, EntityType.WITHER_SKULL),
+        SHULKER_BULLET(67, EntityType.SHULKER_BULLET),
+        LIAMA_SPIT(68, EntityType.LIAMA_SPIT),
+        FALLING_BLOCK(70, EntityType.FALLING_BLOCK),
+        ITEM_FRAME(71, EntityType.ITEM_FRAME),
+        ENDER_SIGNAL(72, EntityType.ENDER_SIGNAL),
+        POTION(73, EntityType.SPLASH_POTION),
+        THROWN_EXP_BOTTLE(75, EntityType.THROWN_EXP_BOTTLE),
+        FIREWORK(76, EntityType.FIREWORK),
+        LEASH(77, EntityType.LEASH_HITCH),
+        ARMOR_STAND(78, EntityType.ARMOR_STAND),
+        EVOCATION_FANGS(39, EntityType.EVOCATION_FANGS),
+        FISHIHNG_HOOK(90, EntityType.FISHING_HOOK),
+        SPECTRAL_ARROW(91, EntityType.SPECTRAL_ARROW),
+        DRAGON_FIREBALL(93, EntityType.DRAGON_FIREBALL);
+
+        private final int id;
+        private final EntityType type;
+
+        public static Optional<ObjectTypes> findById(int id) {
+            if (id == -1)
+                return Optional.absent();
+
+            for (ObjectTypes ent : ObjectTypes.values())
+                if (ent.getId() == id)
+                    return Optional.of(ent);
+
+            return Optional.absent();
+        }
+
+        public static Optional<EntityType> getPCEntity(int id) {
+            Optional<ObjectTypes> output = findById(id);
+
+            if (!output.isPresent())
+                return Optional.absent();
+            return Optional.of(output.get().getType());
+        }
+    }
+}

common/src/main/java/us/myles/ViaVersion/api/minecraft/Environment.java

@@ -0,0 +1,32 @@
+package us.myles.ViaVersion.api.minecraft;
+
+import java.util.HashMap;
+import java.util.Map;
+
+public enum Environment {
+    NORMAL(0),
+    NETHER(-1),
+    END(1);
+
+    private final int id;
+    private static final Map<Integer, Environment> lookup = new HashMap<>();
+
+    static {
+        for (Environment env : values()) {
+            lookup.put(env.getId(), env);
+        }
+    }
+
+    Environment(int id) {
+        this.id = id;
+    }
+
+    public int getId() {
+        return id;
+    }
+
+
+    public static Environment getEnvironmentById(int id) {
+        return lookup.get(id);
+    }
+}

common/src/main/java/us/myles/ViaVersion/api/minecraft/EulerAngle.java

@@ -0,0 +1,12 @@
+package us.myles.ViaVersion.api.minecraft;
+
+import lombok.AllArgsConstructor;
+import lombok.Data;
+
+@Data
+@AllArgsConstructor
+public class EulerAngle {
+    private float x;
+    private float y;
+    private float z;
+}

common/src/main/java/us/myles/ViaVersion/api/minecraft/Position.java

@@ -0,0 +1,16 @@
+package us.myles.ViaVersion.api.minecraft;
+
+import lombok.AllArgsConstructor;
+import lombok.EqualsAndHashCode;
+import lombok.Getter;
+import lombok.ToString;
+
+@AllArgsConstructor
+@Getter
+@ToString
+@EqualsAndHashCode
+public class Position {
+    private Long x;
+    private Long y;
+    private Long z;
+}

common/src/main/java/us/myles/ViaVersion/api/minecraft/Vector.java

@@ -0,0 +1,12 @@
+package us.myles.ViaVersion.api.minecraft;
+
+import lombok.AllArgsConstructor;
+import lombok.Data;
+
+@Data
+@AllArgsConstructor
+public class Vector {
+    private int blockX;
+    private int blockY;
+    private int blockZ;
+}

common/src/main/java/us/myles/ViaVersion/api/minecraft/chunks/Chunk.java

@@ -0,0 +1,23 @@
+package us.myles.ViaVersion.api.minecraft.chunks;
+
+import org.spacehq.opennbt.tag.builtin.CompoundTag;
+
+import java.util.List;
+
+public interface Chunk {
+    int getX();
+
+    int getZ();
+
+    ChunkSection[] getSections();
+
+    boolean isGroundUp();
+
+    boolean isBiomeData();
+
+    byte[] getBiomeData();
+
+    int getBitmask();
+
+    List<CompoundTag> getBlockEntities();
+}

common/src/main/java/us/myles/ViaVersion/api/minecraft/chunks/ChunkSection.java

@@ -0,0 +1,15 @@
+package us.myles.ViaVersion.api.minecraft.chunks;
+
+import io.netty.buffer.ByteBuf;
+
+public interface ChunkSection {
+    int getBlockId(int x, int y, int z);
+
+    void writeBlocks(ByteBuf output) throws Exception;
+
+    void writeBlockLight(ByteBuf output) throws Exception;
+
+    boolean hasSkyLight();
+
+    void writeSkyLight(ByteBuf output) throws Exception;
+}

common/src/main/java/us/myles/ViaVersion/api/minecraft/chunks/NibbleArray.java

@@ -0,0 +1,127 @@
+package us.myles.ViaVersion.api.minecraft.chunks;
+
+import java.util.Arrays;
+
+public class NibbleArray {
+    private final byte[] handle;
+
+    public NibbleArray(int length) {
+        if (length == 0 || length % 2 != 0) {
+            throw new IllegalArgumentException("Length of nibble array must be a positive number dividable by 2!");
+        }
+
+        this.handle = new byte[length / 2];
+    }
+
+    public NibbleArray(byte[] handle) {
+        if (handle.length == 0 || handle.length % 2 != 0) {
+            throw new IllegalArgumentException("Length of nibble array must be a positive number dividable by 2!");
+        }
+
+        this.handle = handle;
+    }
+
+    /**
+     * Get the value at a desired X, Y, Z
+     *
+     * @param x Block X
+     * @param y Block Y
+     * @param z Block Z
+     * @return The value at the given XYZ
+     */
+    public byte get(int x, int y, int z) {
+        return get(y << 8 | z << 4 | x);
+    }
+
+    /**
+     * Get the value at an index
+     *
+     * @param index The index to lookup
+     * @return The value at that index.
+     */
+    public byte get(int index) {
+        byte value = handle[index / 2];
+        if (index % 2 == 0) {
+            return (byte) (value & 0xF);
+        } else {
+            return (byte) ((value >> 4) & 0xF);
+        }
+    }
+
+    /**
+     * Set the value based on an x, y, z
+     *
+     * @param x     Block X
+     * @param y     Block Y
+     * @param z     Block Z
+     * @param value Desired Value
+     */
+    public void set(int x, int y, int z, int value) {
+        set(y << 8 | z << 4 | x, value);
+    }
+
+    /**
+     * Set a value at an index
+     *
+     * @param index The index to set the value at.
+     * @param value The desired value
+     */
+    public void set(int index, int value) {
+        index /= 2;
+        if (index % 2 == 0) {
+            handle[index] = (byte) (handle[index] & 0xF0 | value & 0xF);
+        } else {
+            handle[index] = (byte) (handle[index] & 0xF | (value & 0xF) << 4);
+        }
+    }
+
+    /**
+     * The size of this nibble
+     *
+     * @return The size as an int of the nibble
+     */
+    public int size() {
+        return handle.length * 2;
+    }
+
+    /**
+     * Get the actual number of bytes
+     *
+     * @return The number of bytes based on the handle.
+     */
+    public int actualSize() {
+        return handle.length;
+    }
+
+    /**
+     * Fill the array with a value
+     *
+     * @param value Value to fill with
+     */
+    public void fill(byte value) {
+        value &= 0xF; // Max nibble size (= 16)
+        Arrays.fill(handle, (byte) ((value << 4) | value));
+    }
+
+    /**
+     * Get the byte array behind this nibble
+     *
+     * @return The byte array
+     */
+    public byte[] getHandle() {
+        return handle;
+    }
+
+    /**
+     * Copy a byte array into this nibble
+     *
+     * @param handle The byte array to copy in.
+     */
+    public void setHandle(byte[] handle) {
+        if (handle.length != this.handle.length) {
+            throw new IllegalArgumentException("Length of handle must equal to size of nibble array!");
+        }
+
+        System.arraycopy(handle, 0, this.handle, 0, handle.length);
+    }
+}

common/src/main/java/us/myles/ViaVersion/api/minecraft/item/Item.java

@@ -0,0 +1,16 @@
+package us.myles.ViaVersion.api.minecraft.item;
+
+import lombok.*;
+import org.spacehq.opennbt.tag.builtin.CompoundTag;
+
+@Getter
+@Setter
+@NoArgsConstructor
+@AllArgsConstructor
+@ToString
+public class Item {
+    private short id;
+    private byte amount;
+    private short data;
+    private CompoundTag tag;
+}

common/src/main/java/us/myles/ViaVersion/api/minecraft/metadata/MetaType.java

@@ -0,0 +1,20 @@
+package us.myles.ViaVersion.api.minecraft.metadata;
+
+import us.myles.ViaVersion.api.type.Type;
+
+public interface MetaType {
+
+    /**
+     * Get the write/read type
+     *
+     * @return Type instance
+     */
+    Type getType();
+
+    /**
+     * Get type id from the specific MetaDataType
+     *
+     * @return Type id as an integer
+     */
+    int getTypeID();
+}

common/src/main/java/us/myles/ViaVersion/api/minecraft/metadata/Metadata.java

@@ -0,0 +1,12 @@
+package us.myles.ViaVersion.api.minecraft.metadata;
+
+import lombok.AllArgsConstructor;
+import lombok.Data;
+
+@AllArgsConstructor
+@Data
+public class Metadata {
+    private int id;
+    private MetaType metaType;
+    private Object value;
+}

common/src/main/java/us/myles/ViaVersion/api/minecraft/metadata/types/MetaType1_8.java

@@ -0,0 +1,27 @@
+package us.myles.ViaVersion.api.minecraft.metadata.types;
+
+import lombok.Getter;
+import lombok.RequiredArgsConstructor;
+import us.myles.ViaVersion.api.minecraft.metadata.MetaType;
+import us.myles.ViaVersion.api.type.Type;
+
+@RequiredArgsConstructor
+@Getter
+public enum MetaType1_8 implements MetaType {
+    Byte(0, Type.BYTE),
+    Short(1, Type.SHORT),
+    Int(2, Type.INT),
+    Float(3, Type.FLOAT),
+    String(4, Type.STRING),
+    Slot(5, Type.ITEM),
+    Position(6, Type.VECTOR),
+    Rotation(7, Type.ROTATION),
+    NonExistent(-1, Type.NOTHING);
+
+    private final int typeID;
+    private final Type type;
+
+    public static MetaType1_8 byId(int id) {
+        return values()[id];
+    }
+}

common/src/main/java/us/myles/ViaVersion/api/minecraft/metadata/types/MetaType1_9.java

@@ -0,0 +1,33 @@
+package us.myles.ViaVersion.api.minecraft.metadata.types;
+
+import lombok.Getter;
+import lombok.RequiredArgsConstructor;
+import us.myles.ViaVersion.api.minecraft.metadata.MetaType;
+import us.myles.ViaVersion.api.type.Type;
+
+@RequiredArgsConstructor
+@Getter
+public enum MetaType1_9 implements MetaType {
+    Byte(0, Type.BYTE),
+    VarInt(1, Type.VAR_INT),
+    Float(2, Type.FLOAT),
+    String(3, Type.STRING),
+    Chat(4, Type.STRING),
+    Slot(5, Type.ITEM),
+    Boolean(6, Type.BOOLEAN),
+    Vector3F(7, Type.ROTATION),
+    Position(8, Type.POSITION),
+    OptPosition(9, Type.OPTIONAL_POSITION),
+    Direction(10, Type.VAR_INT),
+    OptUUID(11, Type.OPTIONAL_UUID),
+    BlockID(12, Type.VAR_INT),
+    Discontinued(99, null);
+
+    private final int typeID;
+    private final Type type;
+
+    public static MetaType1_9 byId(int id) {
+        return values()[id];
+    }
+
+}

common/src/main/java/us/myles/ViaVersion/api/platform/TaskId.java

@@ -0,0 +1,11 @@
+package us.myles.ViaVersion.api.platform;
+
+public interface TaskId {
+    /**
+     * Returns the actual object represented by this TaskId
+     * Null if task cannot be cancelled.
+     *
+     * @return Platform based Object (don't assume)
+     */
+    Object getObject();
+}

common/src/main/java/us/myles/ViaVersion/api/platform/ViaInjector.java

@@ -0,0 +1,39 @@
+package us.myles.ViaVersion.api.platform;
+
+public interface ViaInjector {
+    /**
+     * Inject into the current Platform
+     *
+     * @throws Exception If there is an error with injecting
+     */
+    void inject() throws Exception;
+
+    /**
+     * Uninject into the current Platform
+     *
+     * @throws Exception If there is an error with uninjecting
+     */
+    void uninject() throws Exception;
+
+    /**
+     * Get the server protocol version
+     *
+     * @return The server protocol integer
+     * @throws Exception If there is an error with getting this info, eg. not binded.
+     */
+    int getServerProtocolVersion() throws Exception;
+
+    /**
+     * Get the name of the encoder for then netty pipeline for this platform.
+     *
+     * @return The name
+     */
+    String getEncoderName();
+
+    /**
+     * Get the name of the decoder for then netty pipeline for this platform.
+     *
+     * @return The name
+     */
+    String getDecoderName();
+}

common/src/main/java/us/myles/ViaVersion/api/platform/ViaPlatform.java

@@ -0,0 +1,143 @@
+package us.myles.ViaVersion.api.platform;
+
+import com.google.gson.JsonObject;
+import us.myles.ViaVersion.api.ViaAPI;
+import us.myles.ViaVersion.api.ViaVersionConfig;
+import us.myles.ViaVersion.api.command.ViaCommandSender;
+import us.myles.ViaVersion.api.configuration.ConfigurationProvider;
+
+import java.util.UUID;
+import java.util.logging.Logger;
+
+/**
+ * ViaPlatform represents a platform ViaVersion runs on
+ *
+ * @param <T> - The player type for the platform, used for API related methods
+ */
+public interface ViaPlatform<T> {
+    /**
+     * Get the logger for this platform
+     *
+     * @return Java Logger (may be a wrapper)
+     */
+    Logger getLogger();
+
+    /**
+     * Get the platform name
+     *
+     * @return Platform Name (simply its name)
+     */
+    String getPlatformName();
+
+    /**
+     * Get the platform version
+     *
+     * @return Platforn version
+     */
+    String getPlatformVersion();
+
+    /**
+     * Get the plugin version
+     *
+     * @return Plugin version as a semver string
+     */
+    String getPluginVersion();
+
+    /**
+     * Run a task Async
+     *
+     * @param runnable The task to run
+     * @return The Task ID
+     */
+    TaskId runAsync(Runnable runnable);
+
+    /**
+     * Run a task Sync
+     *
+     * @param runnable The task to run
+     * @return The Task ID
+     */
+    TaskId runSync(Runnable runnable);
+
+    /**
+     * Run a task at a repeating interval.
+     * Initial interval is the same as repeat.
+     *
+     * @param runnable The task to run
+     * @param ticks    The interval to run it at
+     * @return The Task ID
+     */
+    TaskId runRepeatingSync(Runnable runnable, Long ticks);
+
+    /**
+     * Cancel a task
+     *
+     * @param taskId The task ID to cancel
+     */
+    void cancelTask(TaskId taskId);
+
+    /**
+     * Get the online players
+     *
+     * @return Array of ViaCommandSender
+     */
+    ViaCommandSender[] getOnlinePlayers();
+
+    /**
+     * Send a message to a player
+     *
+     * @param uuid    The player's UUID
+     * @param message The message to send
+     */
+    void sendMessage(UUID uuid, String message);
+
+    /**
+     * Kick a player for a reason
+     *
+     * @param uuid    The player's UUID
+     * @param message The message to kick them with
+     * @return True if it was successful
+     */
+    boolean kickPlayer(UUID uuid, String message);
+
+    /**
+     * Check if the plugin is enabled.
+     *
+     * @return True if it is enabled
+     */
+    boolean isPluginEnabled();
+
+    /**
+     * Get the API for this platform
+     *
+     * @return The API for the platform
+     */
+    ViaAPI<T> getApi();
+
+    /**
+     * Get the config API for this platform
+     *
+     * @return The config API
+     */
+    ViaVersionConfig getConf();
+
+    /**
+     * Get the backend configuration provider for this platform.
+     * (On some platforms this returns the same as getConf())
+     *
+     * @return The configuration provider
+     */
+    ConfigurationProvider getConfigurationProvider();
+
+    /**
+     * Called when a reload happens
+     */
+    void onReload();
+
+    /**
+     * Get the JSON data required for /viaversion dump
+     *
+     * @return The json data
+     */
+    JsonObject getDump();
+}

common/src/main/java/us/myles/ViaVersion/api/platform/ViaPlatformLoader.java

@@ -0,0 +1,8 @@
+package us.myles.ViaVersion.api.platform;
+
+public interface ViaPlatformLoader {
+    /**
+     * Initialise the loading for a platform, eg. registering listeners / providers / events etc.
+     */
+    void load();
+}

common/src/main/java/us/myles/ViaVersion/api/platform/providers/Provider.java

@@ -0,0 +1,4 @@
+package us.myles.ViaVersion.api.platform.providers;
+
+public interface Provider {
+}

common/src/main/java/us/myles/ViaVersion/api/platform/providers/ViaProviders.java

@@ -0,0 +1,37 @@
+package us.myles.ViaVersion.api.platform.providers;
+
+import java.util.ArrayList;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+
+public class ViaProviders {
+    private final Map<Class<? extends Provider>, Provider> providers = new HashMap<>();
+    private final List<Class<? extends Provider>> lonelyProviders = new ArrayList<>();
+
+    public void require(Class<? extends Provider> provider) {
+        lonelyProviders.add(provider);
+    }
+
+    public <T extends Provider> void register(Class<T> provider, T value) {
+        providers.put(provider, value);
+    }
+
+    public <T extends Provider> void use(Class<T> provider, T value) {
+        if (lonelyProviders.contains(provider)) {
+            lonelyProviders.remove(provider);
+        }
+        providers.put(provider, value);
+    }
+
+    public <T extends Provider> T get(Class<T> provider) {
+        if (providers.containsKey(provider)) {
+            return (T) providers.get(provider);
+        } else {
+            if (lonelyProviders.contains(provider)) {
+                throw new IllegalStateException("There was no provider for " + provider + ", one is required!");
+            }
+            return null;
+        }
+    }
+}

common/src/main/java/us/myles/ViaVersion/api/protocol/Protocol.java

@@ -0,0 +1,169 @@
+package us.myles.ViaVersion.api.protocol;
+
+import lombok.AllArgsConstructor;
+import lombok.Getter;
+import us.myles.ViaVersion.api.PacketWrapper;
+import us.myles.ViaVersion.api.Pair;
+import us.myles.ViaVersion.api.data.UserConnection;
+import us.myles.ViaVersion.api.platform.providers.ViaProviders;
+import us.myles.ViaVersion.api.remapper.PacketRemapper;
+import us.myles.ViaVersion.exception.CancelException;
+import us.myles.ViaVersion.packets.Direction;
+import us.myles.ViaVersion.packets.State;
+
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+
+public abstract class Protocol {
+    private final Map<Pair<State, Integer>, ProtocolPacket> incoming = new HashMap<>();
+    private final Map<Pair<State, Integer>, ProtocolPacket> outgoing = new HashMap<>();
+
+    public Protocol() {
+        registerPackets();
+    }
+
+    /**
+     * Should this protocol filter an object packet from this class.
+     * Default: false
+     *
+     * @param packetClass The class of the current input
+     * @return True if it should handle the filtering
+     */
+    public boolean isFiltered(Class packetClass) {
+        return false;
+    }
+
+    /**
+     * Filter a packet into the output
+     *
+     * @param info   The current user connection
+     * @param packet The input packet as an object (NMS)
+     * @param output The list to put the object into.
+     * @throws Exception Throws exception if cancelled / error.
+     */
+    protected void filterPacket(UserConnection info, Object packet, List output) throws Exception {
+        output.add(packet);
+    }
+
+    /**
+     * Register listeners for this protocol
+     *
+     * @deprecated No longer used as listeners are registered in {@link us.myles.ViaVersion.api.platform.ViaPlatformLoader#load}
+     */
+    @Deprecated
+    protected void registerListeners() {
+
+    }
+
+    /**
+     * Handle protocol registration phase, use this to register providers / tasks.
+     *
+     * @param providers The current providers
+     */
+    protected void register(ViaProviders providers) {
+
+    }
+
+    /**
+     * Register the packets for this protocol
+     */
+    protected abstract void registerPackets();
+
+    /**
+     * Initialise a user for this protocol setting up objects.
+     *
+     * @param userConnection The user to initialise
+     */
+    public abstract void init(UserConnection userConnection);
+
+    /**
+     * Register an incoming packet, with simple id transformation.
+     *
+     * @param state       The state which the packet is sent in.
+     * @param oldPacketID The old packet ID
+     * @param newPacketID The new packet ID
+     */
+    public void registerIncoming(State state, int oldPacketID, int newPacketID) {
+        registerIncoming(state, oldPacketID, newPacketID, null);
+    }
+
+    /**
+     * Register an incoming packet, with id transformation and remapper.
+     *
+     * @param state          The state which the packet is sent in.
+     * @param oldPacketID    The old packet ID
+     * @param newPacketID    The new packet ID
+     * @param packetRemapper The remapper to use for the packet
+     */
+    public void registerIncoming(State state, int oldPacketID, int newPacketID, PacketRemapper packetRemapper) {
+        ProtocolPacket protocolPacket = new ProtocolPacket(state, oldPacketID, newPacketID, packetRemapper);
+        incoming.put(new Pair<>(state, newPacketID), protocolPacket);
+    }
+
+    /**
+     * Register an outgoing packet, with simple id transformation.
+     *
+     * @param state       The state which the packet is sent in.
+     * @param oldPacketID The old packet ID
+     * @param newPacketID The new packet ID
+     */
+    public void registerOutgoing(State state, int oldPacketID, int newPacketID) {
+        registerOutgoing(state, oldPacketID, newPacketID, null);
+    }
+
+    /**
+     * Register an outgoing packet, with id transformation and remapper.
+     *
+     * @param state          The state which the packet is sent in.
+     * @param oldPacketID    The old packet ID
+     * @param newPacketID    The new packet ID
+     * @param packetRemapper The remapper to use for the packet
+     */
+    public void registerOutgoing(State state, int oldPacketID, int newPacketID, PacketRemapper packetRemapper) {
+        ProtocolPacket protocolPacket = new ProtocolPacket(state, oldPacketID, newPacketID, packetRemapper);
+        outgoing.put(new Pair<>(state, oldPacketID), protocolPacket);
+    }
+
+    /**
+     * Transform a packet using this protocol
+     *
+     * @param direction     The direction the packet is going in
+     * @param state         The current protocol state
+     * @param packetWrapper The packet wrapper to transform
+     * @throws Exception Throws exception if it fails to transform
+     */
+    public void transform(Direction direction, State state, PacketWrapper packetWrapper) throws Exception {
+        Pair<State, Integer> statePacket = new Pair<>(state, packetWrapper.getId());
+        Map<Pair<State, Integer>, ProtocolPacket> packetMap = (direction == Direction.OUTGOING ? outgoing : incoming);
+        ProtocolPacket protocolPacket;
+        if (packetMap.containsKey(statePacket)) {
+            protocolPacket = packetMap.get(statePacket);
+        } else {
+            return;
+        }
+        // write packet id
+        int newID = direction == Direction.OUTGOING ? protocolPacket.getNewID() : protocolPacket.getOldID();
+        packetWrapper.setId(newID);
+        // remap
+        if (protocolPacket.getRemapper() != null) {
+            protocolPacket.getRemapper().remap(packetWrapper);
+            if (packetWrapper.isCancelled())
+                throw new CancelException();
+        }
+    }
+
+    @Override
+    public String toString() {
+        return "Protocol:" + getClass().getSimpleName();
+    }
+
+    @AllArgsConstructor
+    @Getter
+    class ProtocolPacket {
+        State state;
+        int oldID;
+        int newID;
+        PacketRemapper remapper;
+    }
+}