InventoryUpdateSyncPacket.java

package slimeknights.tconstruct.tools.common.network;

import net.minecraft.client.Minecraft;
import net.minecraft.client.network.NetHandlerPlayClient;
import net.minecraft.item.ItemStack;
import net.minecraft.network.NetHandlerPlayServer;
import net.minecraft.tileentity.TileEntity;
import net.minecraft.util.math.BlockPos;
import net.minecraftforge.fml.common.network.ByteBufUtils;

import io.netty.buffer.ByteBuf;
import slimeknights.mantle.network.AbstractPacketThreadsafe;
import slimeknights.mantle.tileentity.TileInventory;

public class InventoryUpdateSyncPacket extends AbstractPacketThreadsafe {

  public ItemStack[] itemStacks;
  public BlockPos pos;

  public InventoryUpdateSyncPacket() {
  }

  public InventoryUpdateSyncPacket(ItemStack[] itemStacks, BlockPos pos) {
    this.itemStacks = itemStacks;
    this.pos = pos;
  }

  @Override
  public void handleClientSafe(NetHandlerPlayClient netHandler) {
    // only ever sent to players in the same dimension as the position
    TileEntity tileEntity = Minecraft.getMinecraft().player.getEntityWorld().getTileEntity(pos);
    if(tileEntity == null || !(tileEntity instanceof TileInventory)) {
      return;
    }

    TileInventory tile = (TileInventory) tileEntity;
    for(int i = 0; i < itemStacks.length; i++) {
      if(itemStacks[i] == null) {
        continue;
      }
      tile.setInventorySlotContents(i, itemStacks[i]);
    }
    Minecraft.getMinecraft().renderGlobal.notifyBlockUpdate(null, pos, null, null, 0);
  }

  @Override
  public void handleServerSafe(NetHandlerPlayServer netHandler) {
    // only send to clients
  }

  @Override
  public void fromBytes(ByteBuf buf) {
    this.pos = readPos(buf);
    int size = buf.readShort();
    this.itemStacks = new ItemStack[size];
    int count = buf.readShort();
    for(int i = 0; i < count; i++) {
      int index = buf.readShort();
      ItemStack stack = ByteBufUtils.readItemStack(buf);
      itemStacks[index] = stack;
    }
  }

  @Override
  public void toBytes(ByteBuf buf) {
    writePos(pos, buf);
    buf.writeShort(itemStacks.length);
    int count = 0;
    for(int i = 0; i < itemStacks.length; i++) {
      if(itemStacks[i] != null) {
        count++;
      }
    }
    buf.writeShort(count);
    for(int i = 0; i < itemStacks.length; i++) {
      if(itemStacks[i] == null) {
        continue;
      }

      buf.writeShort(i);
      ByteBufUtils.writeItemStack(buf, itemStacks[i]);
    }
  }
}