Fix commandblock minecarts

src/main/java/us/myles/ViaVersion/metadata/MetaIndex.java

@@ -1,7 +1,6 @@
 package us.myles.ViaVersion.metadata;
 
 import org.bukkit.entity.*;
-import org.bukkit.entity.minecart.CommandMinecart;
 
 public enum MetaIndex {
 
@@ -107,8 +106,8 @@ public enum MetaIndex {
     MINECART_BLOCK_Y(Minecart.class, 21, Type.Int, 9, NewType.VarInt),
     MINECART_SHOWBLOCK(Minecart.class, 22, Type.Byte, 10, NewType.Boolean),
     // Command minecart (they are still broken)
-    MINECART_COMMANDBLOCK_COMMAND(CommandMinecart.class,23,Type.String,11,NewType.String),
+    MINECART_COMMANDBLOCK_COMMAND(Minecart.class, 23, Type.String, 11, NewType.String),
-    MINECART_COMMANDBLOCK_OUTPUT(CommandMinecart.class,24,Type.String,12,NewType.Chat),
+    MINECART_COMMANDBLOCK_OUTPUT(Minecart.class, 24, Type.String, 12, NewType.Chat),
     // furnace cart
     FURNACECART_ISPOWERED(org.bukkit.entity.minecart.PoweredMinecart.class, 16, Type.Byte, 11, NewType.Boolean),
     // item drop

src/main/java/us/myles/ViaVersion/metadata/MetadataRewriter.java

@@ -1,20 +1,19 @@
 package us.myles.ViaVersion.metadata;
 
+import io.netty.buffer.ByteBuf;
+import org.bukkit.entity.EntityType;
+import org.bukkit.util.EulerAngle;
+import org.bukkit.util.Vector;
+import us.myles.ViaVersion.slot.ItemSlotRewriter;
+import us.myles.ViaVersion.slot.ItemSlotRewriter.ItemStack;
+import us.myles.ViaVersion.transformers.OutgoingTransformer;
+import us.myles.ViaVersion.util.PacketUtil;
+
 import java.util.ArrayList;
 import java.util.Iterator;
 import java.util.List;
 import java.util.UUID;
 
-import org.bukkit.entity.EntityType;
-import org.bukkit.util.EulerAngle;
-import org.bukkit.util.Vector;
-
-import io.netty.buffer.ByteBuf;
-
-import us.myles.ViaVersion.slot.ItemSlotRewriter;
-import us.myles.ViaVersion.slot.ItemSlotRewriter.ItemStack;
-import us.myles.ViaVersion.util.PacketUtil;
-
 public class MetadataRewriter {
 
     public static void writeMetadata1_9(EntityType type, List<Entry> list, ByteBuf output) {
@@ -110,6 +109,9 @@ public class MetadataRewriter {
                             output.writeFloat((float) angle.getY());
                             output.writeFloat((float) angle.getZ());
                             break;
+                        case Chat:
+                            PacketUtil.writeString(OutgoingTransformer.fixJson((String) value), output);
+                            break;
                         default:
                             System.out.println("[Out] Unhandled MetaDataType: " + metaIndex.getNewType());
                             break;

src/main/java/us/myles/ViaVersion/transformers/IncomingTransformer.java

@@ -216,6 +216,11 @@ public class IncomingTransformer {
                 PacketUtil.writeString(command, output);
                 output.writeBoolean(flag);
                 return;
+            } else if (name.equals("MC|AdvCmd")) {
+                output.clear();
+                PacketUtil.writeVarInt(PacketType.PLAY_PLUGIN_MESSAGE_REQUEST.getPacketID(), output);
+                PacketUtil.writeString("MC|AdvCdm", output);
+                output.writeBytes(b);
             }
             output.writeBytes(b);
         }