Rename ChunkHandler

Introduce Packet Filtering

README.md

@@ -8,15 +8,8 @@ The things which stop this from going live:
 
 Need to implement debug mode using deprecated PacketType for english
 
-Need to implement a way for mappers to register listeners <--
-
-
-and eventually we'll add a way to add things the way chunk handler works!!
-
 and then javadocs.
 
-and maybe check for memory leaks.
-
 
 It would be nice to have a Pipeline cache so it doesn't have to figure it out all the time.
 (and to ensure it uses the shortest pipeline)

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

@@ -11,6 +11,7 @@ import us.myles.ViaVersion.packets.Direction;
 import us.myles.ViaVersion.packets.State;
 
 import java.util.HashMap;
+import java.util.List;
 import java.util.Map;
 
 public abstract class Protocol {
@@ -22,6 +23,14 @@ public abstract class Protocol {
         registerListeners();
     }
 
+    public boolean isFiltered(Class packetClass) {
+        return false;
+    }
+
+    protected void filterPacket(UserConnection info, Object packet, List output) throws Exception {
+        output.add(packet);
+    }
+
     protected void registerListeners() {
 
     }

src/main/java/us/myles/ViaVersion/api/protocol/ProtocolPipeline.java

@@ -2,10 +2,10 @@ package us.myles.ViaVersion.api.protocol;
 
 import us.myles.ViaVersion.api.PacketWrapper;
 import us.myles.ViaVersion.api.data.UserConnection;
-import us.myles.ViaVersion.protocols.base.BaseProtocol;
-import us.myles.ViaVersion.protocols.base.ProtocolInfo;
 import us.myles.ViaVersion.packets.Direction;
 import us.myles.ViaVersion.packets.State;
+import us.myles.ViaVersion.protocols.base.BaseProtocol;
+import us.myles.ViaVersion.protocols.base.ProtocolInfo;
 
 import java.util.ArrayList;
 import java.util.Collections;
@@ -78,4 +78,15 @@ public class ProtocolPipeline extends Protocol {
         }
         return false;
     }
+
+    public boolean filter(Object o, List list) throws Exception {
+        for (Protocol protocol : protocolList) {
+            if (protocol.isFiltered(o.getClass())) {
+                protocol.filterPacket(userConnection, o, list);
+                return true;
+            }
+        }
+
+        return false;
+    }
 }

src/main/java/us/myles/ViaVersion/handlers/ViaPacketHandler.java

@@ -5,15 +5,13 @@ import io.netty.channel.ChannelHandlerContext;
 import io.netty.handler.codec.MessageToMessageEncoder;
 import us.myles.ViaVersion.api.data.UserConnection;
 import us.myles.ViaVersion.protocols.base.ProtocolInfo;
-import us.myles.ViaVersion.protocols.protocol1_9to1_8.Protocol1_9TO1_8;
-import us.myles.ViaVersion.protocols.protocol1_9to1_8.storage.ClientChunks;
 
 import java.util.List;
 
-public class ViaChunkHandler extends MessageToMessageEncoder {
+public class ViaPacketHandler extends MessageToMessageEncoder {
     private final UserConnection info;
 
-    public ViaChunkHandler(UserConnection info) {
+    public ViaPacketHandler(UserConnection info) {
         this.info = info;
     }
 
@@ -25,9 +23,8 @@ public class ViaChunkHandler extends MessageToMessageEncoder {
         if (!(o instanceof ByteBuf)) {
             info.setLastPacket(o);
             /* This transformer is more for fixing issues which we find hard at packet level :) */
-            if (o.getClass().getName().endsWith("PacketPlayOutMapChunkBulk") && info.isActive()) {
-                if (info.get(ProtocolInfo.class).getPipeline().contains(Protocol1_9TO1_8.class)) {
-                    list.addAll(info.get(ClientChunks.class).transformMapChunkBulk(o));
+            if (info.isActive()) {
+                if (info.get(ProtocolInfo.class).getPipeline().filter(o, list)) {
                     return;
                 }
             }

src/main/java/us/myles/ViaVersion/handlers/ViaVersionInitializer.java

@@ -36,10 +36,10 @@ public class ViaVersionInitializer extends ChannelInitializer<SocketChannel> {
         // Add our transformers
         ViaEncodeHandler encoder = new ViaEncodeHandler(info, (MessageToByteEncoder) socketChannel.pipeline().get("encoder"));
         ViaDecodeHandler decoder = new ViaDecodeHandler(info, (ByteToMessageDecoder) socketChannel.pipeline().get("decoder"));
-        ViaChunkHandler chunkHandler = new ViaChunkHandler(info);
+        ViaPacketHandler chunkHandler = new ViaPacketHandler(info);
 
         socketChannel.pipeline().replace("encoder", "encoder", encoder);
         socketChannel.pipeline().replace("decoder", "decoder", decoder);
-        socketChannel.pipeline().addAfter("packet_handler", "viaversion_chunk_handler", chunkHandler);
+        socketChannel.pipeline().addAfter("packet_handler", "viaversion_packet_handler", chunkHandler);
     }
 }

src/main/java/us/myles/ViaVersion/protocols/protocol1_9to1_8/Protocol1_9TO1_8.java

@@ -99,6 +99,16 @@ public class Protocol1_9TO1_8 extends Protocol {
         Bukkit.getPluginManager().registerEvents(new CommandBlockListener(plugin), plugin);
     }
 
+    @Override
+    public boolean isFiltered(Class packetClass) {
+        return packetClass.getName().endsWith("PacketPlayOutMapChunkBulk");
+    }
+
+    @Override
+    protected void filterPacket(UserConnection info, Object packet, List output) throws Exception {
+        output.addAll(info.get(ClientChunks.class).transformMapChunkBulk(packet));
+    }
+
     @Override
     public void init(UserConnection userConnection) {
         // Entity tracker