Fixes compatibility with ProtocolSupport

src/main/java/io/akarin/server/core/AkarinWorldAccessor.java

@@ -1,5 +1,9 @@
 package io.akarin.server.core;
 
+import java.util.List;
+
+import com.google.common.collect.Lists;
+
 import lombok.RequiredArgsConstructor;
 import net.minecraft.server.BlockPosition;
 import net.minecraft.server.Entity;
@@ -17,73 +21,113 @@ import net.minecraft.server.WorldManager;
 public class AkarinWorldAccessor implements IWorldAccess {
     private final WorldManager worldManager;
     private final NavigationListener navigationListener;
+    private IWorldAccess[] customAccessors;
+    private boolean hasCustomAccessor;
+    
+    public void add(IWorldAccess worldAccessor) {
+        List<IWorldAccess> accessors = Lists.newArrayList(customAccessors);
+        accessors.add(worldAccessor);
+        customAccessors = accessors.toArray(new IWorldAccess[accessors.size()]);
+        hasCustomAccessor = true;
+    }
     
     @Override
     public void a(Entity arg0) {
         worldManager.a(arg0);
         navigationListener.a(arg0);
+        if (hasCustomAccessor)
+            for (IWorldAccess accessor : customAccessors)
+                accessor.a(arg0);
     }
     
     @Override
     public void a(int arg0, BlockPosition arg1, int arg2) {
         worldManager.a(arg0, arg1, arg2);
+        if (hasCustomAccessor)
+            for (IWorldAccess accessor : customAccessors)
+                accessor.a(arg0, arg1, arg2);
     }
     
     @Override
     public void a(EntityHuman arg0, int arg1, BlockPosition arg2, int arg3) {
         worldManager.a(arg0, arg1, arg2, arg3);
+        if (hasCustomAccessor)
+            for (IWorldAccess accessor : customAccessors)
+                accessor.a(arg0, arg1, arg2, arg3);
     }
     
     @Override
     public void a(IBlockAccess arg0, BlockPosition arg1, IBlockData arg2, IBlockData arg3, int arg4) {
         worldManager.a(arg0, arg1, arg2, arg3, arg4);
         navigationListener.a(arg0, arg1, arg2, arg3, arg4);
+        if (hasCustomAccessor)
+            for (IWorldAccess accessor : customAccessors)
+                accessor.a(arg0, arg1, arg2, arg3, arg4);
     }
     
     @Override
     public void a(EntityHuman arg0, SoundEffect arg1, SoundCategory arg2, double arg3, double arg4, double arg5, float arg6, float arg7) {
         worldManager.a(arg0, arg1, arg2, arg3, arg4, arg5, arg6, arg7);
+        if (hasCustomAccessor)
+            for (IWorldAccess accessor : customAccessors)
+                accessor.a(arg0, arg1, arg2, arg3, arg4, arg5, arg6, arg7);
     }
     
     @Override
     public void b(Entity arg0) {
         worldManager.b(arg0);
         navigationListener.b(arg0);
+        if (hasCustomAccessor)
+            for (IWorldAccess accessor : customAccessors)
+                accessor.b(arg0);
     }
     
     @Override
     public void b(int arg0, BlockPosition arg1, int arg2) {
         worldManager.b(arg0, arg1, arg2);
+        if (hasCustomAccessor)
+            for (IWorldAccess accessor : customAccessors)
+                accessor.b(arg0, arg1, arg2);
     }
     
     // unused
     @Override
     @Deprecated
     public void a(BlockPosition arg0) {
-        ;
+        if (hasCustomAccessor)
+            for (IWorldAccess accessor : customAccessors)
+                accessor.a(arg0);
     }
     
     @Override
     @Deprecated
     public void a(SoundEffect arg0, BlockPosition arg1) {
-        ;
+        if (hasCustomAccessor)
+            for (IWorldAccess accessor : customAccessors)
+                accessor.a(arg0, arg1);
     }
     
     @Override
     @Deprecated
     public void a(int arg0, int arg1, int arg2, int arg3, int arg4, int arg5) {
-        ;
+        if (hasCustomAccessor)
+            for (IWorldAccess accessor : customAccessors)
+                accessor.a(arg0, arg1, arg2, arg3, arg4, arg5);
     }
     
     @Override
     @Deprecated
     public void a(ParticleParam arg0, boolean arg1, double arg2, double arg3, double arg4, double arg5, double arg6, double arg7) {
-        ;
+        if (hasCustomAccessor)
+            for (IWorldAccess accessor : customAccessors)
+                accessor.a(arg0, arg1, arg2, arg3, arg4, arg5, arg6, arg7);
     }
     
     @Override
     @Deprecated
     public void a(ParticleParam arg0, boolean arg1, boolean arg2, double arg3, double arg4, double arg5, double arg6, double arg7, double arg8) {
-        ;
+        if (hasCustomAccessor)
+            for (IWorldAccess accessor : customAccessors)
+                accessor.a(arg0, arg1, arg2, arg3, arg4, arg5, arg6, arg7, arg8);
     }
 }

src/main/java/net/minecraft/server/World.java

@@ -1253,7 +1253,10 @@ public abstract class World implements IEntityAccess, GeneratorAccess, IIBlockAc
     }
 
     public void addIWorldAccess(IWorldAccess iworldaccess) {
-        worldAccessor = new AkarinWorldAccessor((WorldManager) iworldaccess, this.u); // Akarin
+        if (worldAccessor != null)
+            worldAccessor.add(iworldaccess);
+        else
+            worldAccessor = new AkarinWorldAccessor((WorldManager) iworldaccess, this.u); // Akarin
         //this.v.add(iworldaccess); // Akarin
     }