Gui Button to Packet

gistfile1.txt

//Button
protected void actionPerformed (GuiButton button)
    {
        if (button.id == 0)
        {
            patternIndex++;
            if (patternIndex > TContent.patternOutputs.length - 1)
                patternIndex = 0;
        }
        else if (button.id == 1)
        {
            patternIndex--;
            if (patternIndex < 0)
                patternIndex = TContent.patternOutputs.length - 1;
        }
        ItemStack pattern = logic.getStackInSlot(0);
        if (pattern != null && pattern.getItem() == TContent.blankPattern)
        {
            ItemStack stack = new ItemStack(TContent.woodPattern, 1, patternIndex + 1);
            logic.setInventorySlotContents(1, stack);
            updateServer(stack);
        }
    }
    
    void updateServer (ItemStack stack)
    {
        ByteArrayOutputStream bos = new ByteArrayOutputStream(8);
        DataOutputStream outputStream = new DataOutputStream(bos);
        try
        {
            outputStream.writeByte(2);
            outputStream.writeInt(logic.worldObj.provider.dimensionId);
            outputStream.writeInt(logic.xCoord);
            outputStream.writeInt(logic.yCoord);
            outputStream.writeInt(logic.zCoord);
            outputStream.writeShort(stack.itemID);
            outputStream.writeShort(stack.getItemDamage());
        }
        catch (Exception ex)
        {
            ex.printStackTrace();
        }

        Packet250CustomPayload packet = new Packet250CustomPayload();
        packet.channel = "TConstruct";
        packet.data = bos.toByteArray();
        packet.length = bos.size();
        
        PacketDispatcher.sendPacketToServer(packet);
    }

//Packet Handler
public class TPacketHandler implements IPacketHandler
{

  @Override
	public void onPacketData (INetworkManager manager, Packet250CustomPayload packet, Player player)
	{
		Side side = FMLCommonHandler.instance().getEffectiveSide();

		if (packet.channel.equals("TConstruct"))
		{
			//System.out.println("Recieved a packet for TConstruct");
			if (side == Side.SERVER)
				handleServerPacket(packet);
			else
				handleClientPacket(packet);
		}
	}

	void handleClientPacket (Packet250CustomPayload packet)
	{
		//System.out.println("Handling client packet");
		DataInputStream inputStream = new DataInputStream(new ByteArrayInputStream(packet.data));

		byte packetType;
		int dimension;
		byte packetID;

		try
		{
			packetID = inputStream.readByte();
			dimension = inputStream.readInt();

			World world = DimensionManager.getWorld(dimension);
		}
		catch (IOException e)
		{
			System.out.println("Failed at reading client packet for TConstruct.");
			e.printStackTrace();
			return;
		}
	}

	void handleServerPacket (Packet250CustomPayload packet)
	{
		//System.out.println("Handling server packet");
		DataInputStream inputStream = new DataInputStream(new ByteArrayInputStream(packet.data));

		byte packetType;
		int dimension;
		byte packetID;

		try
		{
			packetID = inputStream.readByte();
			dimension = inputStream.readInt();

			World world = DimensionManager.getWorld(dimension);

			if (packetID == 1) //Tool Station
			{
				int x = inputStream.readInt();
				int y = inputStream.readInt();
				int z = inputStream.readInt();
				TileEntity te = world.getBlockTileEntity(x, y, z);
				
				String toolName = inputStream.readUTF();
				if (te instanceof ToolStationLogic)
				{
					((ToolStationLogic) te).setToolname(toolName);
				}
			}
			else if (packetID == 2) //Stencil Table
			{
				int x = inputStream.readInt();
				int y = inputStream.readInt();
				int z = inputStream.readInt();
				TileEntity te = world.getBlockTileEntity(x, y, z);
				
				Short itemID = inputStream.readShort();
				Short itemDamage = inputStream.readShort();
				if (te instanceof InventoryLogic)
				{
					((InventoryLogic) te).setInventorySlotContents(1, new ItemStack(itemID, 1, itemDamage));
				}
			}

		}
		catch (IOException e)
		{
			System.out.println("Failed at reading server packet for TConstruct.");
			e.printStackTrace();
			return;
		}
	}
}