buildcraft.core.lib.network.PacketHandler.java Source code

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Here is the source code for buildcraft.core.lib.network.PacketHandler.java

Source

/**
 * Copyright (c) 2011-2015, SpaceToad and the BuildCraft Team
 * http://www.mod-buildcraft.com
 * <p/>
 * BuildCraft is distributed under the terms of the Minecraft Mod Public
 * License 1.0, or MMPL. Please check the contents of the license located in
 * http://www.mod-buildcraft.com/MMPL-1.0.txt
 */
package buildcraft.core.lib.network;

import java.io.IOException;

import io.netty.channel.ChannelHandler.Sharable;
import io.netty.channel.ChannelHandlerContext;
import io.netty.channel.SimpleChannelInboundHandler;

import net.minecraft.entity.Entity;
import net.minecraft.entity.player.EntityPlayer;
import net.minecraft.network.INetHandler;
import net.minecraft.tileentity.TileEntity;
import net.minecraft.world.World;

import cpw.mods.fml.common.network.NetworkRegistry;

import buildcraft.api.core.ISerializable;
import buildcraft.core.lib.network.command.PacketCommand;
import buildcraft.core.network.PacketIds;
import buildcraft.core.proxy.CoreProxy;

@Sharable
public class PacketHandler extends SimpleChannelInboundHandler<Packet> {
    private void onTileUpdate(EntityPlayer player, PacketTileUpdate packet) throws IOException {
        World world = player.worldObj;

        if (!packet.targetExists(world)) {
            return;
        }

        TileEntity entity = packet.getTarget(world);

        if (!(entity instanceof ISerializable)) {
            return;
        }

        ISerializable tile = (ISerializable) entity;
        tile.readData(packet.stream);
    }

    private void onEntityUpdate(EntityPlayer player, PacketEntityUpdate packet) throws IOException {
        World world = player.worldObj;

        if (!packet.targetExists(world)) {
            return;
        }

        Entity entity = packet.getTarget(world);

        if (!(entity instanceof ISerializable)) {
            return;
        }

        ISerializable payload = (ISerializable) entity;
        payload.readData(packet.stream);
    }

    @Override
    protected void channelRead0(ChannelHandlerContext ctx, Packet packet) {
        try {
            INetHandler netHandler = ctx.channel().attr(NetworkRegistry.NET_HANDLER).get();
            EntityPlayer player = CoreProxy.proxy.getPlayerFromNetHandler(netHandler);

            int packetID = packet.getID();

            switch (packetID) {
            case PacketIds.TILE_UPDATE: {
                onTileUpdate(player, (PacketTileUpdate) packet);
                break;
            }

            case PacketIds.ENTITY_UPDATE: {
                onEntityUpdate(player, (PacketEntityUpdate) packet);
                break;
            }

            case PacketIds.COMMAND: {
                ((PacketCommand) packet).handle(player);
                break;
            }

            case PacketIds.STATE_UPDATE: {
                PacketTileState pkt = (PacketTileState) packet;
                World world = player.worldObj;

                TileEntity tile = world.getTileEntity(pkt.posX, pkt.posY, pkt.posZ);

                if (tile instanceof ISyncedTile) {
                    pkt.applyStates((ISyncedTile) tile);
                }

                break;
            }

            case PacketIds.GUI_RETURN: {
                // action will have happened already at read time
                break;
            }

            case PacketIds.GUI_WIDGET: {
                // action will have happened already at read time
                break;
            }
            }
        } catch (Exception ex) {
            ex.printStackTrace();
        }
    }
}