StripesHandlerBucket.java

package buildcraft.transport.stripes;

import net.minecraft.block.Block;
import net.minecraft.entity.player.EntityPlayer;
import net.minecraft.init.Blocks;
import net.minecraft.init.Items;
import net.minecraft.item.ItemBucket;
import net.minecraft.item.ItemStack;
import net.minecraft.world.World;

import net.minecraftforge.common.util.ForgeDirection;
import net.minecraftforge.fluids.FluidContainerRegistry;
import net.minecraftforge.fluids.FluidStack;

import buildcraft.api.transport.IStripesActivator;
import buildcraft.api.transport.IStripesHandler;
import buildcraft.core.lib.utils.BlockUtils;

public class StripesHandlerBucket implements IStripesHandler {
	private static final ItemStack emptyBucket = new ItemStack(Items.bucket, 1);

	private ItemStack getFilledBucket(FluidStack fluidStack, Block underblock) {
		if (underblock == Blocks.lava) {
			return new ItemStack(Items.lava_bucket, 1);
		} else if (underblock == Blocks.water) {
			return new ItemStack(Items.water_bucket, 1);
		} else {
			return FluidContainerRegistry.fillFluidContainer(fluidStack, emptyBucket);
		}
	}

	@Override
	public StripesHandlerType getType() {
		return StripesHandlerType.ITEM_USE;
	}

	@Override
	public boolean shouldHandle(ItemStack stack) {
		return stack.getItem() instanceof ItemBucket;
	}

	@Override
	public boolean handle(World world, int x, int y, int z,
						  ForgeDirection direction, ItemStack stack, EntityPlayer player,
						  IStripesActivator activator) {
		if (world.isAirBlock(x, y, z)) {
			if (((ItemBucket) stack.getItem()).tryPlaceContainedLiquid(world, x, direction.ordinal() < 2 ? y : (y - 1), z)) {
				activator.sendItem(emptyBucket, direction.getOpposite());
				stack.stackSize--;
				if (stack.stackSize > 0) {
					activator.sendItem(stack, direction.getOpposite());
				}

				return true;
			}
		}

		if (!FluidContainerRegistry.isEmptyContainer(stack)) {
			activator.sendItem(stack, direction.getOpposite());
			return true;
		}

		Block targetBlock = world.getBlock(x, y, z);
		FluidStack fluidStack = BlockUtils.drainBlock(targetBlock, world, x, y, z, true);

		if (fluidStack == null) {
			targetBlock = world.getBlock(x, y - 1, z);
			fluidStack = BlockUtils.drainBlock(targetBlock, world, x, y - 1, z, true);
		}

		ItemStack filledBucket = getFilledBucket(fluidStack, targetBlock);

		if (fluidStack == null || filledBucket == null) {
			activator.sendItem(stack, direction.getOpposite());
			return true;
		}

		activator.sendItem(filledBucket, direction.getOpposite());
		stack.stackSize--;
		if (stack.stackSize > 0) {
			activator.sendItem(stack, direction.getOpposite());
		}

		return true;
	}

}