Merge branch 'master' into dev

.github/ISSUE_TEMPLATE/bug_report.md

@@ -0,0 +1,26 @@
+---
+name: Bug report
+about: Create a bug report so we can fix it
+
+---
+
+**Describe the bug, provide any errors**
+A clear and concise description of what the bug is. Can you https://hastebin.com the error?
+
+**How can we reproduce it?**
+Steps to reproduce the behavior:
+1. Login on 1.12'
+2. Click on '....'
+3. The '....' is displayed wrong
+
+**Expected behaviour**
+A clear and concise description of what you expected to happen.
+
+**Screenshots**
+If applicable, add screenshots to help explain your problem.
+
+**ViaVersion Dump:**
+- Type /viaversion dump, and put the link here.
+
+**Additional server info**
+Do you use a proxy (eg. BungeeCord)? What software do you use and what plugins?

.github/ISSUE_TEMPLATE/feature_request.md

@@ -0,0 +1,17 @@
+---
+name: Feature request
+about: Suggest an idea for ViaVersion
+
+---
+
+**Is your feature request related to a problem? Please describe.**
+A clear and concise description of what the problem is. Ex. I'm always frustrated when [...]
+
+**Describe the solution you'd like**
+A clear and concise description of what you want to happen.
+
+**Describe alternatives you've considered**
+A clear and concise description of any alternative solutions or features you've considered.
+
+**Which versions is this for?**
+Does the feature apply to any specific versions? If so put them here.

ISSUE_TEMPLATE.md

@@ -1,11 +0,0 @@
-### What is the output link of /viaversion dump? 
-
-
-### 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? 
-
-
-### Is there an error in the console? Use pastebin.com. Is there a kick message?
-

bukkit/pom.xml

@@ -5,7 +5,7 @@
     <parent>
         <artifactId>viaversion-parent</artifactId>
         <groupId>us.myles</groupId>
-        <version>1.6.1-18w46a</version>
+        <version>2.0.0-18w46a</version>
     </parent>
     <modelVersion>4.0.0</modelVersion>
 

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

@@ -34,7 +34,7 @@ public class ViaVersionPlugin extends JavaPlugin implements ViaPlatform {
     private boolean lateBind = false;
     private boolean protocolSupport = false;
     @Getter
-    private BukkitConfigAPI conf;
+    private BukkitViaConfig conf;
     @Getter
     private ViaAPI<Player> api = new BukkitViaAPI(this);
     private List<Runnable> queuedTasks = new ArrayList<>();
@@ -51,7 +51,7 @@ public class ViaVersionPlugin extends JavaPlugin implements ViaPlatform {
                 .loader(new BukkitViaLoader(this))
                 .build());
         // Config magic
-        conf = new BukkitConfigAPI();
+        conf = new BukkitViaConfig();
         // For compatibility
         ViaVersion.setInstance(this);
 

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

@@ -11,10 +11,10 @@ import java.util.Arrays;
 import java.util.List;
 import java.util.Map;
 
-public class BukkitConfigAPI extends Config implements ViaVersionConfig {
+public class BukkitViaConfig extends Config implements ViaVersionConfig {
-    private static List<String> UNSUPPORTED = Arrays.asList("bungee-ping-interval", "bungee-ping-save", "bungee-servers");
+    private static List<String> UNSUPPORTED = Arrays.asList("bungee-ping-interval", "bungee-ping-save", "bungee-servers", "velocity-ping-interval", "velocity-ping-save", "velocity-servers");
 
-    public BukkitConfigAPI() {
+    public BukkitViaConfig() {
         super(new File(((ViaVersionPlugin) Via.getPlatform()).getDataFolder(), "config.yml"));
         // Load config
         reloadConfig();
@@ -192,7 +192,7 @@ public class BukkitConfigAPI extends Config implements ViaVersionConfig {
 
     @Override
     public URL getDefaultConfigURL() {
-        return BukkitConfigAPI.class.getClassLoader().getResource("assets/viaversion/config.yml");
+        return BukkitViaConfig.class.getClassLoader().getResource("assets/viaversion/config.yml");
     }
 
     @Override

bungee/pom.xml

@@ -5,7 +5,7 @@
     <parent>
         <artifactId>viaversion-parent</artifactId>
         <groupId>us.myles</groupId>
-        <version>1.6.1-18w46a</version>
+        <version>2.0.0-18w46a</version>
     </parent>
     <modelVersion>4.0.0</modelVersion>
 

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

@@ -31,13 +31,13 @@ import java.util.concurrent.TimeUnit;
 
 public class BungeePlugin extends Plugin implements ViaPlatform, Listener {
     private BungeeViaAPI api;
-    private BungeeConfigAPI config;
+    private BungeeViaConfig config;
     private BungeeCommandHandler commandHandler;
 
     @Override
     public void onLoad() {
         api = new BungeeViaAPI();
-        config = new BungeeConfigAPI(getDataFolder());
+        config = new BungeeViaConfig(getDataFolder());
         commandHandler = new BungeeCommandHandler();
         ProxyServer.getInstance().getPluginManager().registerCommand(this, new BungeeCommand(commandHandler));
         // Init platform
@@ -134,7 +134,7 @@ public class BungeePlugin extends Plugin implements ViaPlatform, Listener {
     }
 
     @Override
-    public BungeeConfigAPI getConf() {
+    public BungeeViaConfig getConf() {
         return config;
     }
 

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

@@ -3,7 +3,7 @@ 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.platform.BungeeViaConfig;
 import us.myles.ViaVersion.bungee.service.ProtocolDetectorService;
 
 public class ProbeSubCmd extends ViaSubCommand {
@@ -15,7 +15,7 @@ public class ProbeSubCmd extends ViaSubCommand {
     @Override
     public String description() {
         return "Forces ViaVersion to scan server protocol versions " +
-                (((BungeeConfigAPI) Via.getConfig()).getBungeePingInterval() == -1 ?
+                (((BungeeViaConfig) Via.getConfig()).getBungeePingInterval() == -1 ?
                         "" : "(Also happens at an interval)");
     }
 

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

@@ -9,10 +9,10 @@ import java.io.File;
 import java.net.URL;
 import java.util.*;
 
-public class BungeeConfigAPI extends Config implements ViaVersionConfig {
+public class BungeeViaConfig extends Config implements ViaVersionConfig {
-    private static List<String> UNSUPPORTED = Arrays.asList("nms-player-ticking", "item-cache", "anti-xray-patch", "quick-move-action-fix");
+    private static List<String> UNSUPPORTED = Arrays.asList("nms-player-ticking", "item-cache", "anti-xray-patch", "quick-move-action-fix", "velocity-ping-interval", "velocity-ping-save", "velocity-servers");
 
-    public BungeeConfigAPI(File configFile) {
+    public BungeeViaConfig(File configFile) {
         super(new File(configFile, "config.yml"));
         // Load config
         reloadConfig();
@@ -20,7 +20,7 @@ public class BungeeConfigAPI extends Config implements ViaVersionConfig {
 
     @Override
     public URL getDefaultConfigURL() {
-        return BungeeConfigAPI.class.getClassLoader().getResource("assets/viaversion/config.yml");
+        return BungeeViaConfig.class.getClassLoader().getResource("assets/viaversion/config.yml");
     }
 
     @Override

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

@@ -6,7 +6,7 @@ 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.platform.BungeeViaConfig;
 import us.myles.ViaVersion.bungee.providers.BungeeVersionProvider;
 
 import java.util.HashMap;
@@ -26,7 +26,7 @@ public class ProtocolDetectorService implements Runnable {
 
     public static Integer getProtocolId(String serverName) {
         // Step 1. Check Config
-        Map<String, Integer> servers = ((BungeeConfigAPI) Via.getConfig()).getBungeeServerProtocols();
+        Map<String, Integer> servers = ((BungeeViaConfig) Via.getConfig()).getBungeeServerProtocols();
         Integer protocol = servers.get(serverName);
         if (protocol != null) {
             return protocol;
@@ -58,9 +58,11 @@ public class ProtocolDetectorService implements Runnable {
             @Override
             public void done(ServerPing serverPing, Throwable throwable) {
                 if (throwable == null && serverPing != null && serverPing.getVersion() != null) {
+                    // Ensure protocol is positive, some services will return -1
+                    if (serverPing.getVersion().getProtocol() > 0) {
                         detectedProtocolIds.put(key, serverPing.getVersion().getProtocol());
-                    if (((BungeeConfigAPI) Via.getConfig()).isBungeePingSave()) {
+                        if (((BungeeViaConfig) Via.getConfig()).isBungeePingSave()) {
-                        Map<String, Integer> servers = ((BungeeConfigAPI) Via.getConfig()).getBungeeServerProtocols();
+                            Map<String, Integer> servers = ((BungeeViaConfig) Via.getConfig()).getBungeeServerProtocols();
                             Integer protocol = servers.get(key);
                             if (protocol != null && protocol == serverPing.getVersion().getProtocol()) {
                                 return;
@@ -74,6 +76,7 @@ public class ProtocolDetectorService implements Runnable {
                         }
                     }
                 }
+            }
         });
     }
 

common/pom.xml

@@ -5,7 +5,7 @@
     <parent>
         <artifactId>viaversion-parent</artifactId>
         <groupId>us.myles</groupId>
-        <version>1.6.1-18w46a</version>
+        <version>2.0.0-18w46a</version>
     </parent>
 
     <modelVersion>4.0.0</modelVersion>
@@ -17,7 +17,7 @@
             <groupId>org.yaml</groupId>
             <artifactId>snakeyaml</artifactId>
             <version>1.18</version>
-            <scope>provided</scope>
+            <scope>compile</scope> <!-- Velocity doesn't have snakeyaml -->
         </dependency>
     </dependencies>
 </project>

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

@@ -18,6 +18,8 @@ import us.myles.ViaVersion.util.PipelineUtil;
 import java.util.Map;
 import java.util.UUID;
 import java.util.concurrent.ConcurrentHashMap;
+import java.util.concurrent.locks.ReadWriteLock;
+import java.util.concurrent.locks.ReentrantReadWriteLock;
 
 @Data
 public class UserConnection {
@@ -36,7 +38,7 @@ public class UserConnection {
     // Used for handling warnings (over time)
     private int secondsObserved = 0;
     private int warnings = 0;
-
+    private ReadWriteLock velocityLock = new ReentrantReadWriteLock();
 
     public UserConnection(Channel channel) {
         this.channel = channel;
@@ -108,7 +110,8 @@ public class UserConnection {
      */
     public ChannelFuture sendRawPacketFuture(final ByteBuf packet) {
         final ChannelHandler handler = channel.pipeline().get(Via.getManager().getInjector().getEncoderName());
-        return channel.pipeline().context(handler).writeAndFlush(packet);
+        ChannelFuture future = channel.pipeline().context(handler).writeAndFlush(packet);
+        return future;
     }
 
     /**
@@ -218,7 +221,8 @@ public class UserConnection {
         }
         buf.writeBytes(packet);
         packet.release();
-        final ChannelHandlerContext context = PipelineUtil.getPreviousContext(Via.getManager().getInjector().getDecoderName(), getChannel().pipeline());
+        final ChannelHandlerContext context = PipelineUtil
+                .getPreviousContext(Via.getManager().getInjector().getDecoderName(), getChannel().pipeline());
         if (currentThread) {
             if (context != null) {
                 context.fireChannelRead(buf);

common/src/main/java/us/myles/ViaVersion/commands/ViaCommandHandler.java

@@ -74,7 +74,7 @@ public abstract class ViaCommandHandler implements ViaVersionCommand {
 
         //SubCommands tabcomplete
         if (args.length == 1) {
-            if (!args[0].equals("")) {
+            if (!args[0].isEmpty()) {
                 for (ViaSubCommand sub : allowed)
                     if (sub.name().toLowerCase().startsWith(args[0].toLowerCase()))
                         output.add(sub.name());

common/src/main/java/us/myles/ViaVersion/protocols/protocol1_13_1to1_13/Protocol1_13_1To1_13.java

@@ -90,6 +90,22 @@ public class Protocol1_13_1To1_13 extends Protocol {
             }
         });
 
+        // Set cooldown
+        registerOutgoing(State.PLAY, 0x18, 0x18, new PacketRemapper() {
+            @Override
+            public void registerMap() {
+                map(Type.VAR_INT); // Item
+                handler(new PacketHandler() {
+                    @Override
+                    public void handle(PacketWrapper wrapper) throws Exception {
+                        wrapper.set(Type.VAR_INT, 0,
+                                InventoryPackets.getNewItemId(wrapper.get(Type.VAR_INT, 0))
+                        );
+                    }
+                });
+            }
+        });
+
         // Boss bar
         registerOutgoing(State.PLAY, 0x0C, 0x0C, new PacketRemapper() {
             @Override

common/src/main/java/us/myles/ViaVersion/protocols/protocol1_13_2to1_13_1/Protocol1_13_2To1_13_1.java

@@ -26,8 +26,7 @@ public class Protocol1_13_2To1_13_1 extends Protocol {
 		registerIncoming(State.PLAY, 0x0B, 0x0B, new PacketRemapper() {
 			@Override
 			public void registerMap() {
-                map(Type.FLAT_ITEM, Type.FLAT_VAR_INT_ITEM);
+				map(Type.FLAT_VAR_INT_ITEM, Type.FLAT_ITEM);
-                map(Type.BOOLEAN);
 			}
 		});
 

common/src/main/java/us/myles/ViaVersion/protocols/protocol1_13to1_12_2/ChatRewriter.java

@@ -4,7 +4,9 @@ import net.md_5.bungee.api.ChatColor;
 import net.md_5.bungee.api.chat.BaseComponent;
 import net.md_5.bungee.api.chat.ClickEvent;
 import net.md_5.bungee.api.chat.TextComponent;
+import net.md_5.bungee.api.chat.TranslatableComponent;
 import net.md_5.bungee.chat.ComponentSerializer;
+import us.myles.ViaVersion.protocols.protocol1_13to1_12_2.data.MappingData;
 
 import java.util.ArrayList;
 import java.util.regex.Matcher;
@@ -115,4 +117,43 @@ public class ChatRewriter {
     public static String jsonTextToLegacy(String value) {
         return TextComponent.toLegacyText(ComponentSerializer.parse(value));
     }
+
+    public static String processTranslate(String value) {
+        BaseComponent[] components = ComponentSerializer.parse(value);
+        for (BaseComponent component : components) {
+            processTranslate(component);
+        }
+        if (components.length == 1) {
+            return ComponentSerializer.toString(components[0]);
+        } else {
+            return ComponentSerializer.toString(components);
+        }
+    }
+
+    private static void processTranslate(BaseComponent component) {
+        if (component instanceof TranslatableComponent) {
+            String oldTranslate = ((TranslatableComponent) component).getTranslate();
+            String newTranslate;
+            newTranslate = MappingData.translateMapping.get(oldTranslate);
+            if (newTranslate == null) MappingData.mojangTranslation.get(oldTranslate);
+            if (newTranslate != null) {
+                ((TranslatableComponent) component).setTranslate(newTranslate);
+            }
+            if (((TranslatableComponent) component).getWith() != null) {
+                for (BaseComponent baseComponent : ((TranslatableComponent) component).getWith()) {
+                    processTranslate(baseComponent);
+                }
+            }
+        }
+        if (component.getHoverEvent() != null) {
+            for (BaseComponent baseComponent : component.getHoverEvent().getValue()) {
+                processTranslate(baseComponent);
+            }
+        }
+        if (component.getExtra() != null) {
+            for (BaseComponent baseComponent : component.getExtra()) {
+                processTranslate(baseComponent);
+            }
+        }
+    }
 }

common/src/main/java/us/myles/ViaVersion/protocols/protocol1_13to1_12_2/Protocol1_13To1_12_2.java

@@ -47,7 +47,8 @@ public class Protocol1_13To1_12_2 extends Protocol {
         }
     };
 
-    public static final PacketHandler SEND_DECLARE_COMMANDS_AND_TAGS = new PacketHandler() { // *insert here a good name*
+    public static final PacketHandler SEND_DECLARE_COMMANDS_AND_TAGS =
+            new PacketHandler() { // *insert here a good name*
                 @Override
                 public void handle(PacketWrapper w) throws Exception {
                     // Send fake declare commands
@@ -98,26 +99,26 @@ public class Protocol1_13To1_12_2 extends Protocol {
             };
 
     // These are arbitrary rewrite values, it just needs an invalid color code character.
-    protected static EnumMap<ChatColor, String> SCOREBOARD_TEAM_NAME_REWRITE = new EnumMap<ChatColor, String>(ChatColor.class) {{
+    protected static EnumMap<ChatColor, Character> SCOREBOARD_TEAM_NAME_REWRITE = new EnumMap<>(ChatColor.class);
-        put(ChatColor.BLACK, ChatColor.COLOR_CHAR + "g");
+    // @formatter:on
-        put(ChatColor.DARK_BLUE, ChatColor.COLOR_CHAR + "h");
-        put(ChatColor.DARK_GREEN, ChatColor.COLOR_CHAR + "i");
-        put(ChatColor.DARK_AQUA, ChatColor.COLOR_CHAR + "j");
-        put(ChatColor.DARK_RED, ChatColor.COLOR_CHAR + "p");
-        put(ChatColor.DARK_PURPLE, ChatColor.COLOR_CHAR + "q");
-        put(ChatColor.GOLD, ChatColor.COLOR_CHAR + "s");
-        put(ChatColor.GRAY, ChatColor.COLOR_CHAR + "t");
-        put(ChatColor.DARK_GRAY, ChatColor.COLOR_CHAR + "u");
-        put(ChatColor.BLUE, ChatColor.COLOR_CHAR + "v");
-        put(ChatColor.GREEN, ChatColor.COLOR_CHAR + "w");
-        put(ChatColor.AQUA, ChatColor.COLOR_CHAR + "x");
-        put(ChatColor.RED, ChatColor.COLOR_CHAR + "y");
-        put(ChatColor.LIGHT_PURPLE, ChatColor.COLOR_CHAR + "z");
-        put(ChatColor.YELLOW, ChatColor.COLOR_CHAR + "!");
-        put(ChatColor.WHITE, ChatColor.COLOR_CHAR + "?");
-    }};
 
     static {
+        SCOREBOARD_TEAM_NAME_REWRITE.put(ChatColor.BLACK, 'g');
+        SCOREBOARD_TEAM_NAME_REWRITE.put(ChatColor.DARK_BLUE, 'h');
+        SCOREBOARD_TEAM_NAME_REWRITE.put(ChatColor.DARK_GREEN, 'i');
+        SCOREBOARD_TEAM_NAME_REWRITE.put(ChatColor.DARK_AQUA, 'j');
+        SCOREBOARD_TEAM_NAME_REWRITE.put(ChatColor.DARK_RED, 'p');
+        SCOREBOARD_TEAM_NAME_REWRITE.put(ChatColor.DARK_PURPLE, 'q');
+        SCOREBOARD_TEAM_NAME_REWRITE.put(ChatColor.GOLD, 's');
+        SCOREBOARD_TEAM_NAME_REWRITE.put(ChatColor.GRAY, 't');
+        SCOREBOARD_TEAM_NAME_REWRITE.put(ChatColor.DARK_GRAY, 'u');
+        SCOREBOARD_TEAM_NAME_REWRITE.put(ChatColor.BLUE, 'v');
+        SCOREBOARD_TEAM_NAME_REWRITE.put(ChatColor.GREEN, 'w');
+        SCOREBOARD_TEAM_NAME_REWRITE.put(ChatColor.AQUA, 'x');
+        SCOREBOARD_TEAM_NAME_REWRITE.put(ChatColor.RED, 'y');
+        SCOREBOARD_TEAM_NAME_REWRITE.put(ChatColor.LIGHT_PURPLE, 'z');
+        SCOREBOARD_TEAM_NAME_REWRITE.put(ChatColor.YELLOW, '!');
+        SCOREBOARD_TEAM_NAME_REWRITE.put(ChatColor.WHITE, '?');
         MappingData.init();
     }
 
@@ -130,6 +131,19 @@ public class Protocol1_13To1_12_2 extends Protocol {
 
         // Outgoing packets
 
+        registerOutgoing(State.LOGIN, 0x0, 0x0, new PacketRemapper() {
+            @Override
+            public void registerMap() {
+                map(Type.STRING);
+                handler(new PacketHandler() {
+                    @Override
+                    public void handle(PacketWrapper wrapper) throws Exception {
+                        wrapper.set(Type.STRING, 0, ChatRewriter.processTranslate(wrapper.get(Type.STRING, 0)));
+                    }
+                });
+            }
+        });
+
         registerOutgoing(State.STATUS, 0x00, 0x00, new PacketRemapper() {
             @Override
             public void registerMap() {
@@ -169,7 +183,36 @@ public class Protocol1_13To1_12_2 extends Protocol {
             }
         });
 
-        registerOutgoing(State.PLAY, 0xF, 0xE);
+        // Boss bar
+        registerOutgoing(State.PLAY, 0xC, 0xC, new PacketRemapper() {
+            @Override
+            public void registerMap() {
+                map(Type.UUID);
+                map(Type.VAR_INT);
+                handler(new PacketHandler() {
+                    @Override
+                    public void handle(PacketWrapper wrapper) throws Exception {
+                        int action = wrapper.get(Type.VAR_INT, 0);
+                        if (action == 0 || action == 3) {
+                            wrapper.write(Type.STRING, ChatRewriter.processTranslate(wrapper.read(Type.STRING)));
+                        }
+                    }
+                });
+            }
+        });
+        // Chat message
+        registerOutgoing(State.PLAY, 0xF, 0xE, new PacketRemapper() {
+            @Override
+            public void registerMap() {
+                map(Type.STRING);
+                handler(new PacketHandler() {
+                    @Override
+                    public void handle(PacketWrapper wrapper) throws Exception {
+                        wrapper.set(Type.STRING, 0, ChatRewriter.processTranslate(wrapper.get(Type.STRING, 0)));
+                    }
+                });
+            }
+        });
         // WorldPackets 0x10 -> 0x0F
 
         // Tab-Complete
@@ -217,13 +260,77 @@ public class Protocol1_13To1_12_2 extends Protocol {
         // New packet 0x11, declare commands
         registerOutgoing(State.PLAY, 0x11, 0x12);
         registerOutgoing(State.PLAY, 0x12, 0x13);
-        registerOutgoing(State.PLAY, 0x13, 0x14);
+        // Open window
+        registerOutgoing(State.PLAY, 0x13, 0x14, new PacketRemapper() {
+            @Override
+            public void registerMap() {
+                map(Type.UNSIGNED_BYTE); // Id
+                map(Type.STRING); // Window type
+                map(Type.STRING); // Title
+                handler(new PacketHandler() {
+                    @Override
+                    public void handle(PacketWrapper wrapper) throws Exception {
+                        wrapper.set(Type.STRING, 1, ChatRewriter.processTranslate(wrapper.get(Type.STRING, 1)));
+                    }
+                });
+            }
+        });
         // InventoryPackets 0x14 -> 0x15
         // InventoryPackets 0x15 -> 0x16
         // InventoryPackets 0x16 -> 0x17
-        registerOutgoing(State.PLAY, 0x17, 0x18);
+        // Set cooldown
+        registerOutgoing(State.PLAY, 0x17, 0x18, new PacketRemapper() {
+            @Override
+            public void registerMap() {
+                handler(new PacketHandler() {
+                    @Override
+                    public void handle(PacketWrapper wrapper) throws Exception {
+                        int item = wrapper.read(Type.VAR_INT);
+                        int ticks = wrapper.read(Type.VAR_INT);
+                        wrapper.cancel();
+                        if (item == 383) { // Spawn egg
+                            for (int i = 0; i < 44; i++) {
+                                Integer newItem = MappingData.oldToNewItems.get(item << 16 | i);
+                                if (newItem != null) {
+                                    PacketWrapper packet = wrapper.create(0x18);
+                                    packet.write(Type.VAR_INT, newItem);
+                                    packet.write(Type.VAR_INT, ticks);
+                                    packet.send(Protocol1_13To1_12_2.class);
+                                } else {
+                                    break;
+                                }
+                            }
+                        } else {
+                            for (int i = 0; i < 16; i++) {
+                                Integer newItem = MappingData.oldToNewItems.get(item << 4 | i);
+                                if (newItem != null) {
+                                    PacketWrapper packet = wrapper.create(0x18);
+                                    packet.write(Type.VAR_INT, newItem);
+                                    packet.write(Type.VAR_INT, ticks);
+                                    packet.send(Protocol1_13To1_12_2.class);
+                                } else {
+                                    break;
+                                }
+                            }
+                        }
+                    }
+                });
+            }
+        });
         // WorldPackets 0x18 -> 0x19
-        registerOutgoing(State.PLAY, 0x1A, 0x1B);
+        // Disconnect
+        registerOutgoing(State.PLAY, 0x1A, 0x1B, new PacketRemapper() {
+            @Override
+            public void registerMap() {
+                map(Type.STRING);
+                handler(new PacketHandler() {
+                    @Override
+                    public void handle(PacketWrapper wrapper) throws Exception {
+                        wrapper.set(Type.STRING, 0, ChatRewriter.processTranslate(wrapper.get(Type.STRING, 0)));
+                    }
+                });
+            }
+        });
         registerOutgoing(State.PLAY, 0x1B, 0x1C);
         // New packet 0x1D - NBT Query
         registerOutgoing(State.PLAY, 0x1C, 0x1E);
@@ -326,7 +433,23 @@ public class Protocol1_13To1_12_2 extends Protocol {
             }
         });
         registerOutgoing(State.PLAY, 0x2C, 0x2E);
-        registerOutgoing(State.PLAY, 0x2D, 0x2F);
+        // Combat event
+        registerOutgoing(State.PLAY, 0x2D, 0x2F, new PacketRemapper() {
+            @Override
+            public void registerMap() {
+                map(Type.VAR_INT); // Event
+                handler(new PacketHandler() {
+                    @Override
+                    public void handle(PacketWrapper wrapper) throws Exception {
+                        if (wrapper.get(Type.VAR_INT, 0) == 2) { // Entity dead
+                            wrapper.passthrough(Type.VAR_INT); // Player id
+                            wrapper.passthrough(Type.INT); // Entity id
+                            wrapper.write(Type.STRING, ChatRewriter.processTranslate(wrapper.read(Type.STRING)));
+                        }
+                    }
+                });
+            }
+        });
         registerOutgoing(State.PLAY, 0x2E, 0x30);
         // New 0x31 - Face Player
         registerOutgoing(State.PLAY, 0x2F, 0x32);
@@ -480,7 +603,22 @@ public class Protocol1_13To1_12_2 extends Protocol {
         });
         registerOutgoing(State.PLAY, 0x46, 0x49);
         registerOutgoing(State.PLAY, 0x47, 0x4A);
-        registerOutgoing(State.PLAY, 0x48, 0x4B);
+        // Title
+        registerOutgoing(State.PLAY, 0x48, 0x4B, new PacketRemapper() {
+            @Override
+            public void registerMap() {
+                map(Type.VAR_INT); // Action
+                handler(new PacketHandler() {
+                    @Override
+                    public void handle(PacketWrapper wrapper) throws Exception {
+                        int action = wrapper.get(Type.VAR_INT, 0);
+                        if (action >= 0 && action <= 2) {
+                            wrapper.write(Type.STRING, ChatRewriter.processTranslate(wrapper.read(Type.STRING)));
+                        }
+                    }
+                });
+            }
+        });
         // New 0x4C - Stop Sound
 
         // Sound Effect packet
@@ -498,7 +636,21 @@ public class Protocol1_13To1_12_2 extends Protocol {
                 });
             }
         });
-        registerOutgoing(State.PLAY, 0x4A, 0x4E);
+        // Player list header and footer
+        registerOutgoing(State.PLAY, 0x4A, 0x4E, new PacketRemapper() {
+            @Override
+            public void registerMap() {
+                map(Type.STRING);
+                map(Type.STRING);
+                handler(new PacketHandler() {
+                    @Override
+                    public void handle(PacketWrapper wrapper) throws Exception {
+                        wrapper.set(Type.STRING, 0, ChatRewriter.processTranslate(wrapper.get(Type.STRING, 0)));
+                        wrapper.set(Type.STRING, 1, ChatRewriter.processTranslate(wrapper.get(Type.STRING, 1)));
+                    }
+                });
+            }
+        });
         registerOutgoing(State.PLAY, 0x4B, 0x4F);
         registerOutgoing(State.PLAY, 0x4C, 0x50);
         // Advancements
@@ -520,8 +672,8 @@ public class Protocol1_13To1_12_2 extends Protocol {
 
                             // Display data
                             if (wrapper.passthrough(Type.BOOLEAN)) {
-                                wrapper.passthrough(Type.STRING); // Title
+                                wrapper.write(Type.STRING, ChatRewriter.processTranslate(wrapper.read(Type.STRING))); // Title
-                                wrapper.passthrough(Type.STRING); // Description
+                                wrapper.write(Type.STRING, ChatRewriter.processTranslate(wrapper.read(Type.STRING))); // Description
                                 Item icon = wrapper.read(Type.ITEM);
                                 InventoryPackets.toClient(icon);
                                 wrapper.write(Type.FLAT_ITEM, icon); // Translate item to flat item
@@ -931,14 +1083,13 @@ public class Protocol1_13To1_12_2 extends Protocol {
         // will just send colour as 'invisible' character
         if (ChatColor.stripColor(name).length() == 0) {
             StringBuilder newName = new StringBuilder();
-            for (int i = 0; i < name.length() / 2; i++) {
+            for (int i = 1; i < name.length(); i += 2) {
-                ChatColor color = ChatColor.getByChar(name.charAt(i * 2 + 1));
+                char colorChar = name.charAt(i);
-                String rewrite = SCOREBOARD_TEAM_NAME_REWRITE.get(color);
+                Character rewrite = SCOREBOARD_TEAM_NAME_REWRITE.get(ChatColor.getByChar(colorChar));
-                if (rewrite != null) { // just in case, should never happen
+                if (rewrite == null) {
-                    newName.append(rewrite);
+                    rewrite = colorChar;
-                } else {
-                    newName.append(name);
                 }
+                newName.append(ChatColor.COLOR_CHAR).append(rewrite);
             }
             name = newName.toString();
         }

common/src/main/java/us/myles/ViaVersion/protocols/protocol1_13to1_12_2/data/MappingData.java

@@ -2,15 +2,19 @@ package us.myles.ViaVersion.protocols.protocol1_13to1_12_2.data;
 
 import com.google.common.collect.BiMap;
 import com.google.common.collect.HashBiMap;
+import com.google.common.io.CharStreams;
 import com.google.gson.JsonArray;
 import com.google.gson.JsonElement;
 import com.google.gson.JsonObject;
+import com.google.gson.reflect.TypeToken;
 import us.myles.ViaVersion.api.Via;
 import us.myles.ViaVersion.util.GsonUtil;
 
 import java.io.IOException;
 import java.io.InputStream;
 import java.io.InputStreamReader;
+import java.io.Reader;
+import java.nio.charset.StandardCharsets;
 import java.util.Arrays;
 import java.util.HashMap;
 import java.util.Map;
@@ -21,6 +25,8 @@ public class MappingData {
     public static Map<String, Integer[]> itemTags = new HashMap<>();
     public static Map<String, Integer[]> fluidTags = new HashMap<>();
     public static BiMap<Short, String> oldEnchantmentsIds = HashBiMap.create();
+    public static Map<String, String> translateMapping = new HashMap<>();
+    public static Map<String, String> mojangTranslation = new HashMap<>();
     public static EnchantmentMappings enchantmentMappings;
     public static SoundMappings soundMappings;
     public static BlockMappings blockMappings;
@@ -42,6 +48,38 @@ public class MappingData {
         enchantmentMappings = new EnchantmentMappingByteArray(mapping1_12.getAsJsonObject("enchantments"), mapping1_13.getAsJsonObject("enchantments"));
         Via.getPlatform().getLogger().info("Loading 1.12.2 -> 1.13 sound mapping...");
         soundMappings = new SoundMappingShortArray(mapping1_12.getAsJsonArray("sounds"), mapping1_13.getAsJsonArray("sounds"));
+        Via.getPlatform().getLogger().info("Loading translation mappping");
+        translateMapping = new HashMap<>();
+        Map<String, String> translateData = GsonUtil.getGson().fromJson(
+                new InputStreamReader(
+                        MappingData.class.getClassLoader()
+                                .getResourceAsStream("assets/viaversion/data/mapping-lang-1.12-1.13.json")
+                ),
+                (new TypeToken<Map<String, String>>(){}).getType());
+        try {
+            String[] lines;
+            try (Reader reader = new InputStreamReader(MappingData.class.getClassLoader()
+                    .getResourceAsStream("mojang-translations/en_US.properties"), StandardCharsets.UTF_8)) {
+                lines = CharStreams.toString(reader).split("\n");
+            }
+            for (String line : lines) {
+                if (line.isEmpty()) continue;
+                String[] keyAndTranslation = line.split("=", 2);
+                if (keyAndTranslation.length != 2) continue;
+                String key = keyAndTranslation[0];
+                String translation = keyAndTranslation[1];
+                if (!translateData.containsKey(key)) {
+                    translateMapping.put(key, translation);
+                } else {
+                    String dataValue = translateData.get(keyAndTranslation[0]);
+                    if (dataValue != null) {
+                        translateMapping.put(key, dataValue);
+                    }
+                }
+            }
+        } catch (IOException e) {
+            e.printStackTrace();
+        }
     }
 
     public static JsonObject loadData(String name) {

common/src/main/java/us/myles/ViaVersion/protocols/protocol1_13to1_12_2/packets/InventoryPackets.java

@@ -447,7 +447,7 @@ public class InventoryPackets {
             case "WDL|REQUEST":
                 return "wdl:request";
             default:
-                return old.matches("[0-9a-z_-]+:[0-9a-z_/.-]+") // Identifier regex
+                return old.matches("([0-9a-z_-]*:)?[0-9a-z_/.-]*") // Identifier regex
                         ? old
                         : "viaversion:legacy/" + BaseEncoding.base32().lowerCase().withPadChar('-').encode(
                         old.getBytes(StandardCharsets.UTF_8));

common/src/main/java/us/myles/ViaVersion/protocols/protocol1_9to1_8/packets/WorldPackets.java

@@ -17,6 +17,7 @@ import us.myles.ViaVersion.api.type.Type;
 import us.myles.ViaVersion.packets.State;
 import us.myles.ViaVersion.protocols.protocol1_9to1_8.ItemRewriter;
 import us.myles.ViaVersion.protocols.protocol1_9to1_8.Protocol1_9TO1_8;
+import us.myles.ViaVersion.api.minecraft.chunks.Chunk1_8;
 import us.myles.ViaVersion.protocols.protocol1_9to1_8.providers.BulkChunkTranslatorProvider;
 import us.myles.ViaVersion.protocols.protocol1_9to1_8.providers.CommandBlockProvider;
 import us.myles.ViaVersion.protocols.protocol1_9to1_8.sounds.Effect;
@@ -121,16 +122,20 @@ public class WorldPackets {
                     @Override
                     public void handle(PacketWrapper wrapper) throws Exception {
                         ClientChunks clientChunks = wrapper.user().get(ClientChunks.class);
-                        Chunk1_8 chunk = (Chunk1_8) wrapper.passthrough(new Chunk1_9to1_8Type(clientChunks));
+	                    Chunk1_9to1_8Type type = new Chunk1_9to1_8Type(clientChunks);
+	                    Chunk1_8 chunk = (Chunk1_8) wrapper.read(type);
                         if (chunk.isUnloadPacket()) {
                             wrapper.setId(0x1D);
 
+                            wrapper.write(Type.INT, chunk.getX());
+                            wrapper.write(Type.INT, chunk.getZ());
                             // Remove commandBlocks on chunk unload
                             CommandBlockProvider provider = Via.getManager().getProviders().get(CommandBlockProvider.class);
                             provider.unloadChunk(wrapper.user(), chunk.getX(), chunk.getZ());
-                        }
+                        } else {
-
+                            wrapper.write(type, chunk);
                             // eat any other data (Usually happens with unload packets)
+                        }
                         wrapper.read(Type.REMAINING_BYTES);
                     }
                 });

common/src/main/java/us/myles/ViaVersion/protocols/protocol1_9to1_8/types/Chunk1_9to1_8Type.java

@@ -4,7 +4,6 @@ import com.github.steveice10.opennbt.tag.builtin.CompoundTag;
 import io.netty.buffer.ByteBuf;
 import us.myles.ViaVersion.api.Via;
 import us.myles.ViaVersion.api.minecraft.chunks.Chunk;
-import us.myles.ViaVersion.api.minecraft.chunks.Chunk1_8;
 import us.myles.ViaVersion.api.minecraft.chunks.ChunkSection;
 import us.myles.ViaVersion.api.type.PartialType;
 import us.myles.ViaVersion.api.type.Type;
@@ -13,6 +12,7 @@ import us.myles.ViaVersion.api.type.types.version.Types1_8;
 import us.myles.ViaVersion.api.type.types.version.Types1_9;
 import us.myles.ViaVersion.protocols.base.ProtocolInfo;
 import us.myles.ViaVersion.protocols.protocol1_10to1_9_3.Protocol1_10To1_9_3_4;
+import us.myles.ViaVersion.api.minecraft.chunks.Chunk1_8;
 import us.myles.ViaVersion.protocols.protocol1_9to1_8.storage.ClientChunks;
 
 import java.util.ArrayList;

common/src/main/java/us/myles/ViaVersion/util/PipelineUtil.java

@@ -5,6 +5,8 @@ import io.netty.channel.ChannelHandlerContext;
 import io.netty.channel.ChannelPipeline;
 import io.netty.handler.codec.ByteToMessageDecoder;
 import io.netty.handler.codec.MessageToByteEncoder;
+import io.netty.handler.codec.MessageToMessageDecoder;
+import io.netty.handler.codec.MessageToMessageEncoder;
 
 import java.lang.reflect.InvocationTargetException;
 import java.lang.reflect.Method;
@@ -14,6 +16,7 @@ import java.util.List;
 public class PipelineUtil {
     private static Method DECODE_METHOD;
     private static Method ENCODE_METHOD;
+    private static Method MTM_DECODE;
 
     static {
         try {
@@ -28,6 +31,12 @@ public class PipelineUtil {
         } catch (NoSuchMethodException e) {
             e.printStackTrace();
         }
+        try {
+            MTM_DECODE = MessageToMessageDecoder.class.getDeclaredMethod("decode", ChannelHandlerContext.class, Object.class, List.class);
+            MTM_DECODE.setAccessible(true);
+        } catch (NoSuchMethodException e) {
+            e.printStackTrace();
+        }
     }
 
     /**
@@ -66,6 +75,16 @@ public class PipelineUtil {
         }
     }
 
+    public static List<Object> callDecode(MessageToMessageDecoder decoder, ChannelHandlerContext ctx, Object msg) throws InvocationTargetException {
+        List<Object> output = new ArrayList<>();
+        try {
+            MTM_DECODE.invoke(decoder, ctx, msg, output);
+        } catch (IllegalAccessException e) {
+            e.printStackTrace();
+        }
+        return output;
+    }
+
     /**
      * Check if a stack trace contains a certain exception
      *

common/src/main/resources/assets/viaversion/config.yml

@@ -46,6 +46,28 @@ bungee-ping-save: true
 bungee-servers: {}
 #
 #----------------------------------------------------------#
+#                    VELOCITY OPTIONS                      #
+#----------------------------------------------------------#
+#
+# Velocity allows you to have different server versions inside.
+# Instead of you entering all the versions of these servers, we can ping them.
+#
+# What interval would you like us to ping at? (in seconds)
+# Use -1 to disable.
+velocity-ping-interval: 60
+# If the above is enabled, should we save the info to the config (in the section below)
+velocity-ping-save: true
+# To get a servers protocol, ViaVersion will do the following:
+# Look for the server in the following section, then look for the last ping if velocity-ping is enabled
+# otherwise use default.
+#
+# The format for the following is:
+#  servername: protocolversion
+# You can find protocol ids on http://wiki.vg/Protocol_version_numbers
+# It will fallback to the default option if none found.
+velocity-servers: {}
+#
+#----------------------------------------------------------#
 #                  GLOBAL PACKET LIMITER                   #
 #----------------------------------------------------------#
 #

jar/pom.xml

@@ -5,7 +5,7 @@
     <parent>
         <artifactId>viaversion-parent</artifactId>
         <groupId>us.myles</groupId>
-        <version>1.6.1-18w46a</version>
+        <version>2.0.0-18w46a</version>
     </parent>
     <modelVersion>4.0.0</modelVersion>
     <name>viaversion-jar</name>
@@ -57,6 +57,10 @@
                             <pattern>org.javassist</pattern>
                             <shadedPattern>us.myles.viaversion.libs.javassist</shadedPattern>
                         </relocation>
+                        <relocation>
+                            <pattern>org.yaml.snakeyaml</pattern>
+                            <shadedPattern>us.myles.viaversion.libs.snakeyaml</shadedPattern>
+                        </relocation>
                     </relocations>
                 </configuration>
                 <executions>
@@ -92,6 +96,11 @@
             <artifactId>viaversion-sponge</artifactId>
             <version>${project.parent.version}</version>
         </dependency>
+        <dependency>
+            <groupId>us.myles</groupId>
+            <artifactId>viaversion-velocity</artifactId>
+            <version>${project.parent.version}</version>
+        </dependency>
     </dependencies>
 
 </project>

pom.xml

@@ -6,7 +6,7 @@
 
     <groupId>us.myles</groupId>
     <artifactId>viaversion-parent</artifactId>
-    <version>1.6.1-18w46a</version>
+    <version>2.0.0-18w46a</version>
     <packaging>pom</packaging>
 
     <name>viaversion-parent</name>
@@ -21,6 +21,7 @@
         <module>bungee</module>
         <module>sponge</module>
         <module>sponge-legacy</module>
+        <module>velocity</module>
         <module>jar</module>
     </modules>
 

sponge-legacy/pom.xml

@@ -5,7 +5,7 @@
     <parent>
         <artifactId>viaversion-parent</artifactId>
         <groupId>us.myles</groupId>
-        <version>1.6.1-18w46a</version>
+        <version>2.0.0-18w46a</version>
     </parent>
     <modelVersion>4.0.0</modelVersion>
 

sponge/pom.xml

@@ -5,7 +5,7 @@
     <parent>
         <artifactId>viaversion-parent</artifactId>
         <groupId>us.myles</groupId>
-        <version>1.6.1-18w46a</version>
+        <version>2.0.0-18w46a</version>
     </parent>
     <modelVersion>4.0.0</modelVersion>
 

sponge/src/main/java/us/myles/ViaVersion/SpongePlugin.java

@@ -55,7 +55,7 @@ public class SpongePlugin implements ViaPlatform {
     @Getter
     private SpongeViaAPI api = new SpongeViaAPI();
     @Getter
-    private SpongeConfigAPI conf;
+    private SpongeViaConfig conf;
 
     @Getter
     private Logger logger;
@@ -65,7 +65,7 @@ public class SpongePlugin implements ViaPlatform {
         // Setup Logger
         logger = new LoggerWrapper(container.getLogger());
         // Setup Plugin
-        conf = new SpongeConfigAPI(container, defaultConfig.getParentFile());
+        conf = new SpongeViaConfig(container, defaultConfig.getParentFile());
         SpongeCommandHandler commandHandler = new SpongeCommandHandler();
         game.getCommandManager().register(this, commandHandler, "viaversion", "viaver", "vvsponge");
         getLogger().info("ViaVersion " + getPluginVersion() + " is now loaded!");

sponge/src/main/java/us/myles/ViaVersion/sponge/platform/SpongeViaConfig.java

@@ -12,11 +12,11 @@ import java.util.List;
 import java.util.Map;
 import java.util.Optional;
 
-public class SpongeConfigAPI extends Config implements ViaVersionConfig {
+public class SpongeViaConfig extends Config implements ViaVersionConfig {
-    private static List<String> UNSUPPORTED = Arrays.asList("anti-xray-patch", "bungee-ping-interval", "bungee-ping-save", "bungee-servers", "quick-move-action-fix");
+    private static List<String> UNSUPPORTED = Arrays.asList("anti-xray-patch", "bungee-ping-interval", "bungee-ping-save", "bungee-servers", "velocity-ping-interval", "velocity-ping-save", "velocity-servers", "quick-move-action-fix");
     private final PluginContainer pluginContainer;
 
-    public SpongeConfigAPI(PluginContainer pluginContainer, File configFile) {
+    public SpongeViaConfig(PluginContainer pluginContainer, File configFile) {
         super(new File(configFile, "config.yml"));
         this.pluginContainer = pluginContainer;
         // Load config

velocity/pom.xml

@@ -0,0 +1,62 @@
+<?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>2.0.0-18w46a</version>
+    </parent>
+    <modelVersion>4.0.0</modelVersion>
+
+    <artifactId>viaversion-velocity</artifactId>
+
+    <properties>
+        <maven.compiler.source>1.8</maven.compiler.source>
+        <maven.compiler.target>1.8</maven.compiler.target>
+    </properties>
+
+    <repositories>
+        <repository>
+            <id>velocity</id>
+            <url>https://repo.velocitypowered.com/snapshots</url>
+        </repository>
+    </repositories>
+
+    <build>
+        <plugins>
+            <plugin>
+                <groupId>org.codehaus.mojo</groupId>
+                <artifactId>templating-maven-plugin</artifactId>
+                <version>1.0.0</version>
+                <executions>
+                    <execution>
+                        <id>filter-src</id>
+                        <goals>
+                            <goal>filter-sources</goal>
+                        </goals>
+                    </execution>
+                </executions>
+            </plugin>
+        </plugins>
+    </build>
+
+    <dependencies>
+        <!-- Common Module -->
+        <dependency>
+            <groupId>us.myles</groupId>
+            <artifactId>viaversion-common</artifactId>
+            <version>${project.parent.version}</version>
+            <scope>provided</scope>
+        </dependency>
+
+        <!-- Velocity API 1.0 -->
+        <dependency>
+            <groupId>com.velocitypowered</groupId>
+            <artifactId>velocity-api</artifactId>
+            <version>1.0-SNAPSHOT</version>
+            <scope>provided</scope>
+        </dependency>
+    </dependencies>
+
+</project>

velocity/src/main/java-templates/us/myles/ViaVersion/velocity/VersionInfo.java

@@ -0,0 +1,5 @@
+package us.myles.ViaVersion.velocity;
+
+public class VersionInfo {
+    public static final String VERSION = "${project.version}";
+}

velocity/src/main/java/us/myles/ViaVersion/VelocityPlugin.java

@@ -0,0 +1,206 @@
+package us.myles.ViaVersion;
+
+import com.google.gson.JsonObject;
+import com.google.inject.Inject;
+import com.velocitypowered.api.event.Subscribe;
+import com.velocitypowered.api.event.connection.DisconnectEvent;
+import com.velocitypowered.api.event.proxy.ProxyInitializeEvent;
+import com.velocitypowered.api.plugin.Plugin;
+import com.velocitypowered.api.plugin.PluginContainer;
+import com.velocitypowered.api.plugin.annotation.DataDirectory;
+import com.velocitypowered.api.proxy.Player;
+import com.velocitypowered.api.proxy.ProxyServer;
+import lombok.Getter;
+import net.kyori.text.serializer.ComponentSerializers;
+import net.md_5.bungee.api.chat.TextComponent;
+import net.md_5.bungee.chat.ComponentSerializer;
+import org.slf4j.Logger;
+import us.myles.ViaVersion.api.Via;
+import us.myles.ViaVersion.api.command.ViaCommandSender;
+import us.myles.ViaVersion.api.configuration.ConfigurationProvider;
+import us.myles.ViaVersion.api.data.UserConnection;
+import us.myles.ViaVersion.api.platform.TaskId;
+import us.myles.ViaVersion.api.platform.ViaPlatform;
+import us.myles.ViaVersion.dump.PluginInfo;
+import us.myles.ViaVersion.util.GsonUtil;
+import us.myles.ViaVersion.velocity.VersionInfo;
+import us.myles.ViaVersion.velocity.command.VelocityCommandHandler;
+import us.myles.ViaVersion.velocity.command.VelocityCommandSender;
+import us.myles.ViaVersion.velocity.platform.*;
+import us.myles.ViaVersion.velocity.service.ProtocolDetectorService;
+import us.myles.ViaVersion.velocity.util.LoggerWrapper;
+
+import java.nio.file.Path;
+import java.util.ArrayList;
+import java.util.List;
+import java.util.UUID;
+import java.util.concurrent.TimeUnit;
+
+@Plugin(
+        id = "viaversion",
+        name = "ViaVersion",
+        version = VersionInfo.VERSION,
+        authors = {"_MylesC", "Matsv"},
+        description = "Allow newer Minecraft versions to connect to an older server version.",
+        url = "https://viaversion.com"
+)
+@Getter
+public class VelocityPlugin implements ViaPlatform<Player> {
+    @Inject
+    private ProxyServer proxy;
+    @Inject
+    public static ProxyServer PROXY;
+    @Inject
+    private Logger loggerslf4j;
+    private java.util.logging.Logger logger;
+    @Inject
+    @DataDirectory
+    private Path configDir;
+    private VelocityViaAPI api;
+    private VelocityViaConfig conf;
+
+    @Subscribe
+    public void onProxyInit(ProxyInitializeEvent e) {
+        PROXY = proxy;
+        VelocityCommandHandler commandHandler = new VelocityCommandHandler();
+        PROXY.getCommandManager().register(commandHandler, "viaver", "vvvelocity", "viaversion");
+        api = new VelocityViaAPI();
+        conf = new VelocityViaConfig(configDir.toFile());
+        logger = new LoggerWrapper(loggerslf4j);
+        Via.init(ViaManager.builder()
+                .platform(this)
+                .commandHandler(commandHandler)
+                .loader(new VelocityViaLoader())
+                .injector(new VelocityViaInjector()).build());
+        Via.getManager().init();
+    }
+
+    @Subscribe
+    public void onQuit(DisconnectEvent e) {
+        UserConnection userConnection = Via.getManager().getPortedPlayers().get(e.getPlayer().getUniqueId());
+        if (userConnection != null) {
+            // Only remove if the connection is disconnected (eg. relogin)
+            if (userConnection.getChannel() == null || !userConnection.getChannel().isOpen()) {
+                Via.getManager().removePortedClient(e.getPlayer().getUniqueId());
+            }
+        }
+    }
+
+    @Override
+    public String getPlatformName() {
+        String proxyImpl = ProxyServer.class.getPackage().getImplementationTitle();
+        return (proxyImpl != null) ? proxyImpl : "Velocity";
+    }
+
+    @Override
+    public String getPlatformVersion() {
+        String version = ProxyServer.class.getPackage().getImplementationVersion();
+        return (version != null) ? version : "Unknown";
+    }
+
+    @Override
+    public String getPluginVersion() {
+        return VersionInfo.VERSION;
+    }
+
+    @Override
+    public TaskId runAsync(Runnable runnable) {
+        return runSync(runnable);
+    }
+
+    @Override
+    public TaskId runSync(Runnable runnable) {
+        return runSync(runnable, 0L);
+    }
+
+    @Override
+    public TaskId runSync(Runnable runnable, Long ticks) {
+        return new VelocityTaskId(
+                PROXY.getScheduler()
+                        .buildTask(this, runnable)
+                        .delay(ticks * 50, TimeUnit.MILLISECONDS).schedule()
+        );
+    }
+
+    @Override
+    public TaskId runRepeatingSync(Runnable runnable, Long ticks) {
+        return new VelocityTaskId(
+                PROXY.getScheduler()
+                        .buildTask(this, runnable)
+                        .repeat(ticks * 50, TimeUnit.MILLISECONDS).schedule()
+        );
+    }
+
+    @Override
+    public void cancelTask(TaskId taskId) {
+        if (taskId instanceof VelocityTaskId) {
+            ((VelocityTaskId) taskId).getObject().cancel();
+        }
+    }
+
+    @Override
+    public ViaCommandSender[] getOnlinePlayers() {
+        return PROXY.getAllPlayers().stream()
+                .map(VelocityCommandSender::new)
+                .toArray(ViaCommandSender[]::new);
+    }
+
+    @Override
+    public void sendMessage(UUID uuid, String message) {
+        PROXY.getPlayer(uuid).ifPresent(it -> it.sendMessage(
+                ComponentSerializers.JSON.deserialize(
+                        ComponentSerializer.toString(TextComponent.fromLegacyText(message)) // Fixes links
+                )
+        ));
+    }
+
+    @Override
+    public boolean kickPlayer(UUID uuid, String message) {
+        return PROXY.getPlayer(uuid).map(it -> {
+            it.disconnect(
+                    ComponentSerializers.JSON.deserialize(
+                            ComponentSerializer.toString(TextComponent.fromLegacyText(message)) // ComponentSerializers.LEGACY is deprecated
+                    )
+            );
+            return true;
+        }).orElse(false);
+    }
+
+    @Override
+    public boolean isPluginEnabled() {
+        return true;
+    }
+
+    @Override
+    public ConfigurationProvider getConfigurationProvider() {
+        return conf;
+    }
+
+    @Override
+    public void onReload() {
+
+    }
+
+    @Override
+    public JsonObject getDump() {
+        JsonObject extra = new JsonObject();
+        List<PluginInfo> plugins = new ArrayList<>();
+        for (PluginContainer p : PROXY.getPluginManager().getPlugins()) {
+            plugins.add(new PluginInfo(
+                    true,
+                    p.getDescription().getName().orElse(p.getDescription().getId()),
+                    p.getDescription().getVersion().orElse("Unknown Version"),
+                    p.getInstance().isPresent() ? p.getInstance().get().getClass().getCanonicalName() : "Unknown",
+                    p.getDescription().getAuthors()
+            ));
+        }
+        extra.add("plugins", GsonUtil.getGson().toJsonTree(plugins));
+        extra.add("servers", GsonUtil.getGson().toJsonTree(ProtocolDetectorService.getDetectedIds()));
+        return extra;
+    }
+
+    @Override
+    public boolean isOldClientsAllowed() {
+        return true;
+    }
+}

velocity/src/main/java/us/myles/ViaVersion/velocity/command/VelocityCommandHandler.java

@@ -0,0 +1,29 @@
+package us.myles.ViaVersion.velocity.command;
+
+import com.velocitypowered.api.command.Command;
+import com.velocitypowered.api.command.CommandSource;
+import org.checkerframework.checker.nullness.qual.NonNull;
+import us.myles.ViaVersion.commands.ViaCommandHandler;
+import us.myles.ViaVersion.velocity.command.subs.ProbeSubCmd;
+
+import java.util.List;
+
+public class VelocityCommandHandler extends ViaCommandHandler implements Command {
+    public VelocityCommandHandler() {
+        try {
+            registerSubCommand(new ProbeSubCmd());
+        } catch (Exception e) {
+            e.printStackTrace();
+        }
+    }
+
+    @Override
+    public void execute(@NonNull CommandSource source, String[] args) {
+        onCommand(new VelocityCommandSender(source), args);
+    }
+
+    @Override
+    public List<String> suggest(@NonNull CommandSource source, String[] currentArgs) {
+        return onTabComplete(new VelocityCommandSender(source), currentArgs);
+    }
+}

velocity/src/main/java/us/myles/ViaVersion/velocity/command/VelocityCommandSender.java

@@ -0,0 +1,46 @@
+package us.myles.ViaVersion.velocity.command;
+
+import com.velocitypowered.api.command.CommandSource;
+import com.velocitypowered.api.proxy.Player;
+import lombok.AllArgsConstructor;
+import net.kyori.text.serializer.ComponentSerializers;
+import net.md_5.bungee.api.chat.TextComponent;
+import net.md_5.bungee.chat.ComponentSerializer;
+import us.myles.ViaVersion.api.command.ViaCommandSender;
+
+import java.util.UUID;
+
+@AllArgsConstructor
+public class VelocityCommandSender implements ViaCommandSender {
+    private CommandSource source;
+
+    @Override
+    public boolean hasPermission(String permission) {
+        return source.hasPermission(permission);
+    }
+
+    @Override
+    public void sendMessage(String msg) {
+        source.sendMessage(
+                ComponentSerializers.JSON.deserialize(
+                        ComponentSerializer.toString(TextComponent.fromLegacyText(msg)) // Fixes links
+                )
+        );
+    }
+
+    @Override
+    public UUID getUUID() {
+        if (source instanceof Player) {
+            return ((Player) source).getUniqueId();
+        }
+        return UUID.fromString(getName());
+    }
+
+    @Override
+    public String getName() {
+        if (source instanceof Player) {
+            return ((Player) source).getUsername();
+        }
+        return "?"; // :(
+    }
+}

velocity/src/main/java/us/myles/ViaVersion/velocity/command/subs/ProbeSubCmd.java

@@ -0,0 +1,28 @@
+package us.myles.ViaVersion.velocity.command.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.velocity.platform.VelocityViaConfig;
+import us.myles.ViaVersion.velocity.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 " +
+                (((VelocityViaConfig) Via.getConfig()).getVelocityPingInterval() == -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;
+    }
+}

velocity/src/main/java/us/myles/ViaVersion/velocity/handlers/VelocityChannelInitializer.java

@@ -0,0 +1,38 @@
+package us.myles.ViaVersion.velocity.handlers;
+
+import io.netty.channel.Channel;
+import io.netty.channel.ChannelInitializer;
+import lombok.NonNull;
+import lombok.RequiredArgsConstructor;
+import us.myles.ViaVersion.api.data.UserConnection;
+import us.myles.ViaVersion.api.protocol.ProtocolPipeline;
+
+import java.lang.reflect.Method;
+
+@RequiredArgsConstructor
+public class VelocityChannelInitializer extends ChannelInitializer {
+    @NonNull
+    private ChannelInitializer original;
+    private Method initChannel;
+
+    {
+        try {
+            initChannel = ChannelInitializer.class.getDeclaredMethod("initChannel", Channel.class);
+            initChannel.setAccessible(true);
+        } catch (NoSuchMethodException e) {
+            e.printStackTrace();
+        }
+    }
+
+    @Override
+    protected void initChannel(Channel channel) throws Exception {
+        initChannel.invoke(original, channel);
+
+        UserConnection user = new UserConnection(channel);
+        new ProtocolPipeline(user);
+
+        // We need to add a separated handler because Velocity uses pipeline().get(MINECRAFT_DECODER)
+        channel.pipeline().addBefore("minecraft-encoder", "via-encoder", new VelocityEncodeHandler(user));
+        channel.pipeline().addBefore("minecraft-decoder", "via-decoder", new VelocityDecodeHandler(user));
+    }
+}

velocity/src/main/java/us/myles/ViaVersion/velocity/handlers/VelocityDecodeHandler.java

@@ -0,0 +1,78 @@
+package us.myles.ViaVersion.velocity.handlers;
+
+import io.netty.buffer.ByteBuf;
+import io.netty.channel.ChannelHandler;
+import io.netty.channel.ChannelHandlerContext;
+import io.netty.handler.codec.MessageToMessageDecoder;
+import lombok.AllArgsConstructor;
+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
+@AllArgsConstructor
+public class VelocityDecodeHandler extends MessageToMessageDecoder<ByteBuf> {
+    private final UserConnection info;
+
+    @Override
+    protected void decode(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;
+            }
+            info.getVelocityLock().readLock().lock();
+            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();
+                    info.getVelocityLock().readLock().unlock();
+                    throw e;
+                }
+            } else {
+                bytebuf.retain();
+            }
+            info.getVelocityLock().readLock().unlock();
+
+            out.add(bytebuf);
+        }
+    }
+
+    @Override
+    public void exceptionCaught(ChannelHandlerContext ctx, Throwable cause) throws Exception {
+        if (PipelineUtil.containsCause(cause, CancelException.class)) return;
+        super.exceptionCaught(ctx, cause);
+    }
+}

velocity/src/main/java/us/myles/ViaVersion/velocity/handlers/VelocityEncodeHandler.java

@@ -0,0 +1,90 @@
+package us.myles.ViaVersion.velocity.handlers;
+
+import io.netty.buffer.ByteBuf;
+import io.netty.channel.ChannelHandler;
+import io.netty.channel.ChannelHandlerContext;
+import io.netty.handler.codec.MessageToByteEncoder;
+import io.netty.handler.codec.MessageToMessageDecoder;
+import io.netty.handler.codec.MessageToMessageEncoder;
+import lombok.NonNull;
+import lombok.RequiredArgsConstructor;
+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
+@RequiredArgsConstructor
+public class VelocityEncodeHandler extends MessageToMessageEncoder<ByteBuf> {
+    @NonNull
+    private final UserConnection info;
+    private boolean handledCompression = false;
+
+    @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
+                && ctx.pipeline().names().indexOf("compression-encoder") > ctx.pipeline().names().indexOf("via-encoder")) {
+            // Need to decompress this packet due to bad order
+            bytebuf = (ByteBuf) PipelineUtil.callDecode((MessageToMessageDecoder) ctx.pipeline().get("compression-decoder"), ctx, bytebuf).get(0);
+            ChannelHandler encoder = ctx.pipeline().get("via-encoder");
+            ChannelHandler decoder = ctx.pipeline().get("via-decoder");
+            ctx.pipeline().remove(encoder);
+            ctx.pipeline().remove(decoder);
+            ctx.pipeline().addAfter("compression-encoder", "via-encoder", encoder);
+            ctx.pipeline().addAfter("compression-decoder", "via-decoder", decoder);
+            needsCompress = true;
+            handledCompression = true;
+        } else {
+            bytebuf.retain();
+        }
+        // Increment sent
+        info.incrementSent();
+
+
+        if (info.isActive()) {
+            // Handle ID
+            int id = Type.VAR_INT.read(bytebuf);
+            // Transform
+            ByteBuf newPacket = bytebuf.alloc().buffer();
+            try {
+                PacketWrapper wrapper = new PacketWrapper(id, bytebuf, info);
+                ProtocolInfo protInfo = info.get(ProtocolInfo.class);
+                protInfo.getPipeline().transform(Direction.OUTGOING, protInfo.getState(), wrapper);
+
+                wrapper.writeToBuffer(newPacket);
+
+                bytebuf.clear();
+                bytebuf.release();
+                bytebuf = newPacket;
+            } catch (Exception e) {
+                bytebuf.clear();
+                bytebuf.release();
+                newPacket.release();
+                throw e;
+            }
+        }
+
+        if (needsCompress) {
+            ByteBuf old = bytebuf;
+            bytebuf = ctx.alloc().buffer();
+            PipelineUtil.callEncode((MessageToByteEncoder) ctx.pipeline().get("compression-encoder"), ctx, old, bytebuf);
+            old.release();
+        }
+        out.add(bytebuf);
+    }
+
+    @Override
+    public void exceptionCaught(ChannelHandlerContext ctx, Throwable cause) throws Exception {
+        if (PipelineUtil.containsCause(cause, CancelException.class)) return;
+        super.exceptionCaught(ctx, cause);
+    }
+}

velocity/src/main/java/us/myles/ViaVersion/velocity/handlers/VelocityServerHandler.java

@@ -0,0 +1,138 @@
+package us.myles.ViaVersion.velocity.handlers;
+
+import com.velocitypowered.api.event.PostOrder;
+import com.velocitypowered.api.event.Subscribe;
+import com.velocitypowered.api.event.player.ServerConnectedEvent;
+import com.velocitypowered.api.event.player.ServerPreConnectEvent;
+import us.myles.ViaVersion.api.Pair;
+import us.myles.ViaVersion.api.Via;
+import us.myles.ViaVersion.api.boss.BossBar;
+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.protocols.base.ProtocolInfo;
+import us.myles.ViaVersion.protocols.protocol1_9to1_8.storage.EntityTracker;
+import us.myles.ViaVersion.util.ReflectionUtil;
+import us.myles.ViaVersion.velocity.service.ProtocolDetectorService;
+import us.myles.ViaVersion.velocity.storage.VelocityStorage;
+
+import java.lang.reflect.InvocationTargetException;
+import java.lang.reflect.Method;
+import java.util.List;
+import java.util.concurrent.Semaphore;
+
+public class VelocityServerHandler {
+    private static Method setProtocolVersion;
+    private static Method setNextProtocolVersion;
+
+    static {
+        try {
+            setProtocolVersion = Class.forName("com.velocitypowered.proxy.connection.MinecraftConnection").getDeclaredMethod("setProtocolVersion", int.class);
+            setNextProtocolVersion = Class.forName("com.velocitypowered.proxy.connection.MinecraftConnection").getDeclaredMethod("setNextProtocolVersion", int.class);
+        } catch (NoSuchMethodException | ClassNotFoundException e) {
+            e.printStackTrace();
+        }
+    }
+
+    @Subscribe
+    public void preServerConnect(ServerPreConnectEvent e) {
+        try {
+            UserConnection user = Via.getManager().getConnection(e.getPlayer().getUniqueId());
+            if (user == null) return;
+            if (!user.has(VelocityStorage.class)) {
+                user.put(new VelocityStorage(user, e.getPlayer()));
+            }
+
+            int protocolId = ProtocolDetectorService.getProtocolId(e.getOriginalServer().getServerInfo().getName());
+            List<Pair<Integer, Protocol>> protocols = ProtocolRegistry.getProtocolPath(user.get(ProtocolInfo.class).getProtocolVersion(), protocolId);
+
+            // Check if ViaVersion can support that version
+            Object connection = ReflectionUtil.invoke(e.getPlayer(), "getConnection");
+            setNextProtocolVersion.invoke(connection, protocols == null ? user.get(ProtocolInfo.class).getProtocolVersion() : protocolId);
+
+        } catch (IllegalAccessException | NoSuchMethodException | InvocationTargetException e1) {
+            e1.printStackTrace();
+        }
+    }
+
+    @Subscribe(order = PostOrder.LATE)
+    public void connectedEvent(ServerConnectedEvent e) {
+        UserConnection user = Via.getManager().getConnection(e.getPlayer().getUniqueId());
+        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 == null) return;
+        // Manually hide ViaVersion-created BossBars if the childserver was version 1.8.x (#666)
+        if (user.has(EntityTracker.class)) {
+            EntityTracker tracker = user.get(EntityTracker.class);
+
+            if (tracker.getBossBarMap() != null)
+                for (BossBar bar : tracker.getBossBarMap().values())
+                    bar.hide();
+        }
+        // Handle server/version change
+        if (user.has(VelocityStorage.class)) {
+            // Wait all the scheduled packets be sent
+            Semaphore semaphore = new Semaphore(1);
+            semaphore.acquireUninterruptibly();
+            user.getChannel().eventLoop().submit((Runnable) semaphore::release);
+            semaphore.acquireUninterruptibly();
+            semaphore.release();
+
+            user.getVelocityLock().writeLock().lock();
+
+            VelocityStorage storage = user.get(VelocityStorage.class);
+
+            if (e.getServer() != null) {
+                if (!e.getServer().getServerInfo().getName().equals(storage.getCurrentServer())) {
+                    String serverName = e.getServer().getServerInfo().getName();
+
+                    storage.setCurrentServer(serverName);
+
+                    int protocolId = ProtocolDetectorService.getProtocolId(serverName);
+
+                    ProtocolInfo info = user.get(ProtocolInfo.class);
+
+                    // Refresh the pipes
+                    List<Pair<Integer, Protocol>> protocols = ProtocolRegistry.getProtocolPath(info.getProtocolVersion(), protocolId);
+                    ProtocolPipeline pipeline = user.get(ProtocolInfo.class).getPipeline();
+                    user.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());
+                        }
+                    }
+
+                    info.setServerProtocolVersion(protocolId);
+                    // Add version-specific base Protocol
+                    pipeline.add(ProtocolRegistry.getBaseProtocol(protocolId));
+
+                    user.put(info);
+                    user.put(storage);
+
+                    user.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(user);
+                    }
+
+                    Object connection = ReflectionUtil.invoke(e.getPlayer(), "getConnection");
+                    int version = (int) ReflectionUtil.invoke(connection,"getNextProtocolVersion");
+                    setProtocolVersion.invoke(ReflectionUtil.invoke(e.getPlayer(), "getConnection"), version);
+                }
+            }
+            user.getVelocityLock().writeLock().unlock();
+        }
+    }
+}

velocity/src/main/java/us/myles/ViaVersion/velocity/listeners/ElytraPatch.java

@@ -0,0 +1,44 @@
+package us.myles.ViaVersion.velocity.listeners;
+
+import com.velocitypowered.api.event.PostOrder;
+import com.velocitypowered.api.event.Subscribe;
+import com.velocitypowered.api.event.player.ServerConnectedEvent;
+import us.myles.ViaVersion.api.PacketWrapper;
+import us.myles.ViaVersion.api.Via;
+import us.myles.ViaVersion.api.data.UserConnection;
+import us.myles.ViaVersion.api.minecraft.metadata.Metadata;
+import us.myles.ViaVersion.api.minecraft.metadata.types.MetaType1_9;
+import us.myles.ViaVersion.api.type.Type;
+import us.myles.ViaVersion.api.type.types.version.Types1_9;
+import us.myles.ViaVersion.protocols.base.ProtocolInfo;
+import us.myles.ViaVersion.protocols.protocol1_9to1_8.Protocol1_9TO1_8;
+import us.myles.ViaVersion.protocols.protocol1_9to1_8.storage.EntityTracker;
+
+import java.util.Collections;
+
+/*
+ * This patches https://github.com/MylesIsCool/ViaVersion/issues/555
+ */
+public class ElytraPatch {
+
+    @Subscribe(order = PostOrder.LAST)
+    public void onServerConnected(ServerConnectedEvent event) {
+        UserConnection user = Via.getManager().getConnection(event.getPlayer().getUniqueId());
+        if (user == null) return;
+
+        try {
+            if (user.get(ProtocolInfo.class).getPipeline().contains(Protocol1_9TO1_8.class)) {
+                int entityId = user.get(EntityTracker.class).getProvidedEntityId();
+
+                PacketWrapper wrapper = new PacketWrapper(0x39, null, user);
+
+                wrapper.write(Type.VAR_INT, entityId);
+                wrapper.write(Types1_9.METADATA_LIST, Collections.singletonList(new Metadata(0, MetaType1_9.Byte, (byte) 0)));
+
+                wrapper.send(Protocol1_9TO1_8.class);
+            }
+        } catch (Exception e) {
+            e.printStackTrace();
+        }
+    }
+}

velocity/src/main/java/us/myles/ViaVersion/velocity/listeners/MainHandPatch.java

@@ -0,0 +1,49 @@
+package us.myles.ViaVersion.velocity.listeners;
+
+import com.velocitypowered.api.event.Subscribe;
+import com.velocitypowered.api.event.player.ServerConnectedEvent;
+import com.velocitypowered.api.proxy.player.PlayerSettings;
+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.protocol1_9to1_8.Protocol1_9TO1_8;
+import us.myles.ViaVersion.protocols.protocol1_9to1_8.storage.EntityTracker;
+import us.myles.ViaVersion.util.ReflectionUtil;
+
+import java.lang.reflect.Method;
+
+/*
+    This solves the wrong mainhand issue when you join with BungeeCord on a 1.8 server, and switch to a 1.9 or higher.
+ */
+public class MainHandPatch {
+    private static Method setSettings;
+
+    static {
+        try {
+            Class clientSettings = Class.forName("com.velocitypowered.proxy.protocol.packet.ClientSettings");
+            setSettings = Class.forName("com.velocitypowered.proxy.connection.client.ConnectedPlayer").getDeclaredMethod("setPlayerSettings", clientSettings);
+            setSettings.setAccessible(true);
+        } catch (ClassNotFoundException | NoSuchMethodException e) {
+            e.printStackTrace();
+        }
+    }
+
+    @Subscribe
+    public void onServerConnect(ServerConnectedEvent event) {
+        UserConnection user = Via.getManager().getConnection(event.getPlayer().getUniqueId());
+        if (user == null || setSettings == null) return;
+
+        try {
+            if (user.get(ProtocolInfo.class).getPipeline().contains(Protocol1_9TO1_8.class)) {
+                PlayerSettings settings = event.getPlayer().getPlayerSettings();
+                if (user.has(EntityTracker.class)) {
+                    Object clientSettings = ReflectionUtil.get(settings, "settings", Object.class);
+                    ReflectionUtil.set(clientSettings, "mainHand", user.get(EntityTracker.class).getMainHand());
+                    setSettings.invoke(event.getPlayer(), clientSettings);
+                }
+            }
+        } catch (Exception e) {
+            e.printStackTrace();
+        }
+    }
+}

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

@@ -0,0 +1,16 @@
+package us.myles.ViaVersion.velocity.listeners;
+
+import com.velocitypowered.api.event.Subscribe;
+import com.velocitypowered.api.event.connection.PostLoginEvent;
+import us.myles.ViaVersion.api.Via;
+import us.myles.ViaVersion.update.UpdateUtil;
+
+public class UpdateListener {
+    @Subscribe
+    public void onJoin(PostLoginEvent e) {
+        if (e.getPlayer().hasPermission("viaversion.update")
+                && Via.getConfig().isCheckForUpdates()) {
+            UpdateUtil.sendUpdateMessage(e.getPlayer().getUniqueId());
+        }
+    }
+}

velocity/src/main/java/us/myles/ViaVersion/velocity/platform/VelocityBossBar.java

@@ -0,0 +1,13 @@
+package us.myles.ViaVersion.velocity.platform;
+
+import com.velocitypowered.api.proxy.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.boss.CommonBoss;
+
+public class VelocityBossBar extends CommonBoss<Player> {
+    public VelocityBossBar(String title, float health, BossColor color, BossStyle style) {
+        super(title, health, color, style);
+    }
+}

velocity/src/main/java/us/myles/ViaVersion/velocity/platform/VelocityTaskId.java

@@ -0,0 +1,12 @@
+package us.myles.ViaVersion.velocity.platform;
+
+import com.velocitypowered.api.scheduler.ScheduledTask;
+import lombok.AllArgsConstructor;
+import lombok.Getter;
+import us.myles.ViaVersion.api.platform.TaskId;
+
+@Getter
+@AllArgsConstructor
+public class VelocityTaskId implements TaskId {
+    private ScheduledTask object;
+}

velocity/src/main/java/us/myles/ViaVersion/velocity/platform/VelocityViaAPI.java

@@ -0,0 +1,78 @@
+package us.myles.ViaVersion.velocity.platform;
+
+import com.velocitypowered.api.proxy.Player;
+import io.netty.buffer.ByteBuf;
+import lombok.NonNull;
+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.protocols.base.ProtocolInfo;
+
+import java.util.Map;
+import java.util.SortedSet;
+import java.util.TreeSet;
+import java.util.UUID;
+
+public class VelocityViaAPI implements ViaAPI<Player> {
+    @Override
+    public int getPlayerVersion(@NonNull Player 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(Player player, ByteBuf packet) throws IllegalArgumentException {
+        sendRawPacket(player.getUniqueId(), packet);
+    }
+
+    @Override
+    public BossBar createBossBar(String title, BossColor color, BossStyle style) {
+        return new VelocityBossBar(title, 1F, color, style);
+    }
+
+    @Override
+    public BossBar createBossBar(String title, float health, BossColor color, BossStyle style) {
+        return new VelocityBossBar(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();
+    }
+}

velocity/src/main/java/us/myles/ViaVersion/velocity/platform/VelocityViaConfig.java

@@ -0,0 +1,280 @@
+package us.myles.ViaVersion.velocity.platform;
+
+import us.myles.ViaVersion.api.ViaVersionConfig;
+import us.myles.ViaVersion.api.protocol.ProtocolVersion;
+import us.myles.ViaVersion.util.Config;
+
+import java.io.File;
+import java.net.URL;
+import java.util.*;
+
+public class VelocityViaConfig extends Config implements ViaVersionConfig {
+    private static List<String> UNSUPPORTED = Arrays.asList("nms-player-ticking", "item-cache", "anti-xray-patch", "quick-move-action-fix", "bungee-ping-interval", "bungee-ping-save", "bungee-servers");
+
+    public VelocityViaConfig(File configFile) {
+        super(new File(configFile, "config.yml"));
+        // Load config
+        reloadConfig();
+    }
+
+    @Override
+    public URL getDefaultConfigURL() {
+        return getClass().getClassLoader().getResource("assets/viaversion/config.yml");
+    }
+
+    @Override
+    protected void handleConfig(Map<String, Object> config) {
+        // Parse servers
+        Map<String, Object> servers;
+        if (!(config.get("velocity-servers") instanceof Map)) {
+            servers = new HashMap<>();
+        } else {
+            servers = (Map) config.get("velocity-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")) {
+            // Side note: This doesn't use ProtocolRegistry as it doesn't know the protocol version at boot.
+            try {
+                servers.put("default", VelocityViaInjector.getLowestSupportedProtocolVersion());
+            } catch (Exception e) {
+                // Something went very wrong
+                e.printStackTrace();
+            }
+        }
+        // Put back
+        config.put("velocity-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 isPistonAnimationPatch() {
+        return getBoolean("piston-animation-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 boolean is1_12NBTArrayFix() {
+        return getBoolean("chat-nbt-fix", true);
+    }
+
+    @Override
+    public boolean is1_12QuickMoveActionFix() {
+        return 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
+    public boolean isMinimizeCooldown() {
+        return getBoolean("minimize-cooldown", true);
+    }
+
+    /**
+     * What is the interval for checking servers via ping
+     * -1 for disabled
+     *
+     * @return Ping interval in seconds
+     */
+    public int getVelocityPingInterval() {
+        return getInt("velocity-ping-interval", 60);
+    }
+
+    /**
+     * Should the velocity ping be saved to the config on change.
+     *
+     * @return True if it should save
+     */
+    public boolean isVelocityPingSave() {
+        return getBoolean("velocity-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> getVelocityServerProtocols() {
+        return get("velocity-servers", Map.class, new HashMap<>());
+    }
+
+    @Override
+    public boolean is1_13TeamColourFix() {
+        return getBoolean("team-colour-fix", true);
+    }
+
+    @Override
+    public boolean isSuppress1_13ConversionErrors() {
+        return getBoolean("suppress-1_13-conversion-errors", false);
+    }
+
+    @Override
+    public boolean isDisable1_13AutoComplete() {
+        return getBoolean("disable-1_13-auto-complete", false);
+    }
+}

velocity/src/main/java/us/myles/ViaVersion/velocity/platform/VelocityViaInjector.java

@@ -0,0 +1,45 @@
+package us.myles.ViaVersion.velocity.platform;
+
+import io.netty.channel.ChannelInitializer;
+import us.myles.ViaVersion.VelocityPlugin;
+import us.myles.ViaVersion.api.Via;
+import us.myles.ViaVersion.api.platform.ViaInjector;
+import us.myles.ViaVersion.util.ReflectionUtil;
+import us.myles.ViaVersion.velocity.handlers.VelocityChannelInitializer;
+
+
+public class VelocityViaInjector implements ViaInjector {
+    @Override
+    public void inject() throws Exception {
+        Object connectionManager = ReflectionUtil.get(VelocityPlugin.PROXY, "cm", Object.class);
+        Object channelInitializerHolder = ReflectionUtil.invoke(connectionManager, "getServerChannelInitializer");
+        ChannelInitializer originalIntializer = (ChannelInitializer) ReflectionUtil.invoke(channelInitializerHolder, "get");
+        channelInitializerHolder.getClass().getMethod("set", ChannelInitializer.class)
+                .invoke(channelInitializerHolder, new VelocityChannelInitializer(originalIntializer));
+    }
+
+    @Override
+    public void uninject() {
+        Via.getPlatform().getLogger().severe("ViaVersion cannot remove itself from Velocity without a reboot!");
+    }
+
+
+    @Override
+    public int getServerProtocolVersion() throws Exception {
+        return getLowestSupportedProtocolVersion();
+    }
+
+    public static int getLowestSupportedProtocolVersion() throws Exception {
+        return ReflectionUtil.getStatic(Class.forName("com.velocitypowered.proxy.protocol.ProtocolConstants"), "MINIMUM_GENERIC_VERSION", int.class);
+    }
+
+    @Override
+    public String getEncoderName() {
+        return "via-encoder";
+    }
+
+    @Override
+    public String getDecoderName() {
+        return "via-decoder";
+    }
+}

velocity/src/main/java/us/myles/ViaVersion/velocity/platform/VelocityViaLoader.java

@@ -0,0 +1,47 @@
+package us.myles.ViaVersion.velocity.platform;
+
+import com.velocitypowered.api.plugin.PluginContainer;
+import us.myles.ViaVersion.VelocityPlugin;
+import us.myles.ViaVersion.api.Via;
+import us.myles.ViaVersion.api.platform.ViaPlatformLoader;
+import us.myles.ViaVersion.protocols.base.VersionProvider;
+import us.myles.ViaVersion.protocols.protocol1_9to1_8.providers.BossBarProvider;
+import us.myles.ViaVersion.protocols.protocol1_9to1_8.providers.MovementTransmitterProvider;
+import us.myles.ViaVersion.velocity.handlers.VelocityServerHandler;
+import us.myles.ViaVersion.velocity.listeners.ElytraPatch;
+import us.myles.ViaVersion.velocity.listeners.MainHandPatch;
+import us.myles.ViaVersion.velocity.listeners.UpdateListener;
+import us.myles.ViaVersion.velocity.providers.VelocityBossBarProvider;
+import us.myles.ViaVersion.velocity.providers.VelocityMovementTransmitter;
+import us.myles.ViaVersion.velocity.providers.VelocityVersionProvider;
+import us.myles.ViaVersion.velocity.service.ProtocolDetectorService;
+
+public class VelocityViaLoader implements ViaPlatformLoader {
+    @Override
+    public void load() {
+        Object plugin = VelocityPlugin.PROXY.getPluginManager()
+                .getPlugin("viaversion").flatMap(PluginContainer::getInstance).get();
+
+        Via.getManager().getProviders().use(MovementTransmitterProvider.class, new VelocityMovementTransmitter());
+        Via.getManager().getProviders().use(BossBarProvider.class, new VelocityBossBarProvider());
+        Via.getManager().getProviders().use(VersionProvider.class, new VelocityVersionProvider());
+        // We probably don't need a EntityIdProvider because velocity sends a Join packet on server change
+
+        VelocityPlugin.PROXY.getEventManager().register(plugin, new UpdateListener());
+        VelocityPlugin.PROXY.getEventManager().register(plugin, new VelocityServerHandler());
+        VelocityPlugin.PROXY.getEventManager().register(plugin, new MainHandPatch());
+        VelocityPlugin.PROXY.getEventManager().register(plugin, new ElytraPatch());
+
+        int pingInterval = ((VelocityViaConfig) Via.getPlatform().getConf()).getVelocityPingInterval();
+        if (pingInterval > 0) {
+            Via.getPlatform().runRepeatingSync(
+                    new ProtocolDetectorService(),
+                    pingInterval * 20L);
+        }
+    }
+
+    @Override
+    public void unload() {
+        // Probably not useful, there's no ProxyReloadEvent
+    }
+}

velocity/src/main/java/us/myles/ViaVersion/velocity/providers/VelocityBossBarProvider.java

@@ -0,0 +1,30 @@
+package us.myles.ViaVersion.velocity.providers;
+
+import us.myles.ViaVersion.api.data.UserConnection;
+import us.myles.ViaVersion.protocols.protocol1_9to1_8.providers.BossBarProvider;
+import us.myles.ViaVersion.velocity.storage.VelocityStorage;
+
+import java.util.UUID;
+
+public class VelocityBossBarProvider extends BossBarProvider {
+    @Override
+    public void handleAdd(UserConnection user, UUID barUUID) {
+        if (user.has(VelocityStorage.class)) {
+            VelocityStorage storage = user.get(VelocityStorage.class);
+            // Check if bossbars are supported by bungee, static maybe
+            if (storage.getBossbar() != null) {
+                storage.getBossbar().add(barUUID);
+            }
+        }
+    }
+
+    @Override
+    public void handleRemove(UserConnection user, UUID barUUID) {
+        if (user.has(VelocityStorage.class)) {
+            VelocityStorage storage = user.get(VelocityStorage.class);
+            if (storage.getBossbar() != null) {
+                storage.getBossbar().remove(barUUID);
+            }
+        }
+    }
+}

velocity/src/main/java/us/myles/ViaVersion/velocity/providers/VelocityMovementTransmitter.java

@@ -0,0 +1,35 @@
+package us.myles.ViaVersion.velocity.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.Protocol1_9TO1_8;
+import us.myles.ViaVersion.protocols.protocol1_9to1_8.providers.MovementTransmitterProvider;
+import us.myles.ViaVersion.protocols.protocol1_9to1_8.storage.MovementTracker;
+
+public class VelocityMovementTransmitter 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(Protocol1_9TO1_8.class);
+            } catch (Exception e) {
+                e.printStackTrace();
+            }
+            // PlayerPackets will increment idle
+        }
+    }
+}

velocity/src/main/java/us/myles/ViaVersion/velocity/providers/VelocityVersionProvider.java

@@ -0,0 +1,73 @@
+package us.myles.ViaVersion.velocity.providers;
+
+import com.google.common.collect.Lists;
+import us.myles.ViaVersion.api.Via;
+import us.myles.ViaVersion.api.data.UserConnection;
+import us.myles.ViaVersion.api.protocol.ProtocolVersion;
+import us.myles.ViaVersion.protocols.base.ProtocolInfo;
+import us.myles.ViaVersion.protocols.base.VersionProvider;
+import us.myles.ViaVersion.util.ReflectionUtil;
+
+import java.util.ArrayList;
+import java.util.Collections;
+import java.util.List;
+
+public class VelocityVersionProvider extends VersionProvider {
+    private static Class<?> ref ;
+
+    static {
+        try {
+            ref = Class.forName("com.velocitypowered.proxy.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)
+        Object list = ReflectionUtil.getStatic(ref, "SUPPORTED_VERSIONS", Object.class);
+        List<Integer> sorted = new ArrayList<Integer>((List) ReflectionUtil.invoke(list, "asList"));
+        Collections.sort(sorted);
+
+        ProtocolInfo info = user.get(ProtocolInfo.class);
+
+        // Bungee supports it
+        if (sorted.contains(info.getProtocolVersion()))
+            return info.getProtocolVersion();
+
+        // Older than bungee supports, get the lowest version
+        if (info.getProtocolVersion() < sorted.get(0)) {
+            return getLowestSupportedVersion();
+        }
+
+        // Loop through all protocols to get the closest protocol id that bungee supports (and that viaversion does too)
+
+        // TODO: This needs a better fix, i.e checking ProtocolRegistry to see if it would work.
+        // This is more of a workaround for snapshot support by bungee.
+        for (Integer protocol : Lists.reverse(sorted)) {
+            if (info.getProtocolVersion() > protocol && ProtocolVersion.isRegistered(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 {
+            return ReflectionUtil.getStatic(
+                    Class.forName("com.velocitypowered.proxy.protocol.ProtocolConstants"),
+                    "MINIMUM_GENERIC_VERSION",
+                    int.class);
+        } catch (NoSuchFieldException | IllegalAccessException | ClassNotFoundException e) {
+            e.printStackTrace();
+        }
+        // Fallback
+        return -1;
+    }
+}

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

@@ -0,0 +1,82 @@
+package us.myles.ViaVersion.velocity.service;
+
+import com.velocitypowered.api.proxy.server.RegisteredServer;
+import lombok.Getter;
+import us.myles.ViaVersion.VelocityPlugin;
+import us.myles.ViaVersion.api.Via;
+import us.myles.ViaVersion.api.protocol.ProtocolVersion;
+import us.myles.ViaVersion.velocity.platform.VelocityViaConfig;
+
+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<>();
+    @Getter
+    private static ProtocolDetectorService instance;
+
+    public ProtocolDetectorService() {
+        instance = this;
+    }
+
+    public static Integer getProtocolId(String serverName) {
+        // Step 1. Check Config
+        Map<String, Integer> servers = ((VelocityViaConfig) Via.getConfig()).getVelocityServerProtocols();
+        Integer protocol = servers.get(serverName);
+        if (protocol != null) {
+            return protocol;
+        }
+        // Step 2. Check Detected
+        Integer detectedProtocol = detectedProtocolIds.get(serverName);
+        if (detectedProtocol != null) {
+            return detectedProtocol;
+        }
+        // Step 3. Use Default
+        Integer defaultProtocol = servers.get("default");
+        if (defaultProtocol != null) {
+            return defaultProtocol;
+        }
+        // Step 4: Use bungee lowest supported... *cries*
+        try {
+            return Via.getManager().getInjector().getServerProtocolVersion();
+        } catch (Exception e) {
+            e.printStackTrace();
+            return ProtocolVersion.v1_8.getId();
+        }
+    }
+
+    @Override
+    public void run() {
+        for (final RegisteredServer serv : VelocityPlugin.PROXY.getAllServers()) {
+            probeServer(serv);
+        }
+    }
+
+    public static void probeServer(final RegisteredServer serverInfo) {
+        final String key = serverInfo.getServerInfo().getName();
+        serverInfo.ping().thenAccept((serverPing) -> {
+                if (serverPing != null && serverPing.getVersion() != null) {
+                    detectedProtocolIds.put(key, serverPing.getVersion().getProtocol());
+                    if (((VelocityViaConfig) Via.getConfig()).isVelocityPingSave()) {
+                        Map<String, Integer> servers = ((VelocityViaConfig) Via.getConfig()).getVelocityServerProtocols();
+                        Integer protocol = servers.get(key);
+                        if (protocol != null && protocol == serverPing.getVersion().getProtocol()) {
+                            return;
+                        }
+                        // Ensure we're the only ones writing to the config
+                        synchronized (Via.getPlatform().getConfigurationProvider()) {
+                            servers.put(key, serverPing.getVersion().getProtocol());
+                        }
+                        // Save
+                        Via.getPlatform().getConfigurationProvider().saveConfig();
+                    }
+            }
+        });
+    }
+
+    public static Map<String, Integer> getDetectedIds() {
+        return new HashMap<>(detectedProtocolIds);
+    }
+
+}

velocity/src/main/java/us/myles/ViaVersion/velocity/storage/VelocityStorage.java

@@ -0,0 +1,38 @@
+package us.myles.ViaVersion.velocity.storage;
+
+import com.velocitypowered.api.proxy.Player;
+import lombok.Data;
+import lombok.EqualsAndHashCode;
+import us.myles.ViaVersion.api.data.StoredObject;
+import us.myles.ViaVersion.api.data.UserConnection;
+import us.myles.ViaVersion.util.ReflectionUtil;
+
+import java.lang.reflect.InvocationTargetException;
+import java.util.Set;
+import java.util.UUID;
+
+@Data
+@EqualsAndHashCode(callSuper = true)
+public class VelocityStorage extends StoredObject {
+    private Player player;
+    private String currentServer;
+    private Set<UUID> bossbar;
+
+    public VelocityStorage(UserConnection user, Player player) {
+        super(user);
+        this.player = player;
+        this.currentServer = "";
+
+        // Get bossbar list if it's supported
+        try {
+            Object connection = ReflectionUtil.invoke(player, "getConnection");
+            Object sessionHandler = ReflectionUtil.invoke(connection, "getSessionHandler");
+            if (sessionHandler.getClass().getSimpleName().contains("Play")) {
+                bossbar = (Set<UUID>) ReflectionUtil.invoke(sessionHandler, "getServerBossBars");
+                // TODO make this work
+            }
+        } catch (NoSuchMethodException | InvocationTargetException | IllegalAccessException e) {
+            e.printStackTrace();
+        }
+    }
+}

velocity/src/main/java/us/myles/ViaVersion/velocity/util/LoggerWrapper.java

@@ -0,0 +1,69 @@
+package us.myles.ViaVersion.velocity.util;
+
+import org.slf4j.Logger;
+
+import java.text.MessageFormat;
+import java.util.logging.Level;
+import java.util.logging.LogRecord;
+
+public class LoggerWrapper extends java.util.logging.Logger {
+    private final Logger base;
+
+    public LoggerWrapper(Logger logger) {
+        super("logger", null);
+        this.base = logger;
+    }
+
+    @Override
+    public void log(LogRecord record) {
+        log(record.getLevel(), record.getMessage());
+    }
+
+    @Override
+    public void log(Level level, String msg) {
+        if (level == Level.FINE)
+            base.debug(msg);
+        else if (level == Level.WARNING)
+            base.warn(msg);
+        else if (level == Level.SEVERE)
+            base.error(msg);
+        else if (level == Level.INFO)
+            base.info(msg);
+        else
+            base.trace(msg);
+    }
+
+    @Override
+    public void log(Level level, String msg, Object param1) {
+        if (level == Level.FINE)
+            base.debug(msg, param1);
+        else if (level == Level.WARNING)
+            base.warn(msg, param1);
+        else if (level == Level.SEVERE)
+            base.error(msg, param1);
+        else if (level == Level.INFO)
+            base.info(msg, param1);
+        else
+            base.trace(msg, param1);
+    }
+
+    @Override
+    public void log(Level level, String msg, Object[] params) {
+        log(level, MessageFormat.format(msg, params)); // workaround not formatting correctly
+    }
+
+    @Override
+    public void log(Level level, String msg, Throwable params) {
+        if (level == Level.FINE)
+            base.debug(msg, params);
+        else if (level == Level.WARNING)
+            base.warn(msg, params);
+        else if (level == Level.SEVERE)
+            base.error(msg, params);
+        else if (level == Level.INFO)
+            base.info(msg, params);
+        else
+            base.trace(msg, params);
+    }
+
+}