ironbarrels/src/main/java/cpw/mods/ironchest/ItemChestChanger.java

/*******************************************************************************
 * Copyright (c) 2012 cpw.
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the GNU Public License v3.0
 * which accompanies this distribution, and is available at
 * http://www.gnu.org/licenses/gpl.html
 *
 * Contributors:
 *     cpw - initial API and implementation
 ******************************************************************************/
package cpw.mods.ironchest;

import net.minecraft.creativetab.CreativeTabs;
import net.minecraft.entity.player.EntityPlayer;
import net.minecraft.item.Item;
import net.minecraft.item.ItemStack;
import net.minecraft.tileentity.TileEntity;
import net.minecraft.tileentity.TileEntityChest;
import net.minecraft.util.BlockPos;
import net.minecraft.util.EnumFacing;
import net.minecraft.world.World;

public class ItemChestChanger extends Item 
{
    private ChestChangerType type;

    public ItemChestChanger(ChestChangerType type)
    {
        this.type = type;
        
        this.setMaxStackSize(1);
        this.setUnlocalizedName("ironchest:" + type.name());
        this.setCreativeTab(CreativeTabs.tabMisc);
    }

    @Override
    public boolean onItemUseFirst (ItemStack stack, EntityPlayer player, World world, BlockPos pos, EnumFacing side, float hitX, float hitY, float hitZ)
    {
        if (world.isRemote)
            return false;
        TileEntity te = world.getTileEntity(pos);
        TileEntityIronChest newchest = new TileEntityIronChest();
        ItemStack[] chestContents = new ItemStack[27];
        if (te != null)
        {
            if (te instanceof TileEntityIronChest)
            {
                chestContents = ((TileEntityIronChest) te).chestContents;
                newchest = IronChestType.makeEntity(this.getTargetChestOrdinal(this.type.ordinal()));
                if (newchest == null)
                    return false;
            }
            else if (te instanceof TileEntityChest)
            {
                if (((TileEntityChest) te).numPlayersUsing > 0)
                    return false;
                if (!getType().canUpgrade(IronChestType.WOOD))
                    return false;
                chestContents = new ItemStack[((TileEntityChest) te).getSizeInventory()];
                for (int i = 0; i < chestContents.length; i++)
                    chestContents[i] = ((TileEntityChest) te).getStackInSlot(i);
                newchest = IronChestType.makeEntity(IronChestType.IRON.ordinal());
            }
        }

        te.updateContainingBlockInfo();
        if (te instanceof TileEntityChest)
            ((TileEntityChest) te).checkForAdjacentChests();

        world.removeTileEntity(pos);
        world.setBlockToAir(pos);

        world.setTileEntity(pos, newchest);
        world.setBlockState(pos, IronChest.ironChestBlock.getStateFromMeta(newchest.getType().ordinal()), 3);

        world.markBlockForUpdate(pos);

        TileEntity te2 = world.getTileEntity(pos);
        if (te2 instanceof TileEntityIronChest)
        {
            ((TileEntityIronChest) te2).setContents(chestContents);
        }

        stack.stackSize = player.capabilities.isCreativeMode ? stack.stackSize : stack.stackSize - 1;
        return true;
    }

    public int getTargetChestOrdinal(int sourceOrdinal)
    {
        return type.getTarget();
    }

    public ChestChangerType getType()
    {
        return type;
    }
}