PacketItemFilter.java

package crazypants.enderio.machine.transceiver;

import io.netty.buffer.ByteBuf;
import net.minecraft.entity.player.EntityPlayer;
import net.minecraft.nbt.NBTTagCompound;

import com.enderio.core.common.network.MessageTileEntity;
import com.enderio.core.common.network.NetworkUtil;

import cpw.mods.fml.common.network.simpleimpl.IMessage;
import cpw.mods.fml.common.network.simpleimpl.IMessageHandler;
import cpw.mods.fml.common.network.simpleimpl.MessageContext;
import crazypants.enderio.conduit.item.filter.ItemFilter;

public class PacketItemFilter extends MessageTileEntity<TileTransceiver> implements IMessageHandler<PacketItemFilter, IMessage> {

  private boolean isSend;
  private ItemFilter filter;

  public PacketItemFilter() {
  }

  public PacketItemFilter(TileTransceiver te, boolean isSend) {
    super(te);
    this.isSend = isSend;
    if(isSend) {
      filter = te.getSendItemFilter();
    } else {
      filter = te.getReceiveItemFilter();
    }
  }

  @Override
  public void toBytes(ByteBuf buf) {
    super.toBytes(buf);
    buf.writeBoolean(isSend);
    NBTTagCompound tag = new NBTTagCompound();
    filter.writeToNBT(tag);
    NetworkUtil.writeNBTTagCompound(tag, buf);
  }

  @Override
  public void fromBytes(ByteBuf buf) {
    super.fromBytes(buf);
    isSend = buf.readBoolean();
    NBTTagCompound tag = NetworkUtil.readNBTTagCompound(buf);
    filter = new ItemFilter();
    filter.readFromNBT(tag);
  }

  @Override
  public IMessage onMessage(PacketItemFilter message, MessageContext ctx) {
    EntityPlayer player = ctx.getServerHandler().playerEntity;
    TileTransceiver tile = message.getTileEntity(player.worldObj);    
    boolean isSend = message.isSend;
    ItemFilter filter = message.filter;
    if(tile != null && filter != null) {
      if(isSend) {
        tile.setSendItemFilter(filter);
      } else {
        tile.setRecieveItemFilter(filter);
      }
    }
    return null;
  }
}