BlockWyverniaDecor.java

package mhfc.net.common.block.environment;

import java.util.Random;

import net.minecraft.block.Block;
import net.minecraft.block.BlockBush;
import net.minecraft.block.material.Material;
import net.minecraft.init.Blocks;
import net.minecraft.item.ItemStack;
import net.minecraft.world.World;

public abstract class BlockWyverniaDecor extends BlockBush {
	public BlockWyverniaDecor(Material material) {
		super(material);
	}

	public boolean isValidPosition(World world, int x, int y, int z,
			int metadata) {
		if (world.getBlock(x, y - 1, z) == Blocks.air)
			return false;

		return canPlaceBlockAt(world, x, y, z);
	}

	@Override
	public void updateTick(World world, int x, int y, int z, Random random) {
		Block block = world.getBlock(x, y, z);

		this.dropIfCantStay(world, x, y, z,
				new ItemStack(block, 1, world.getBlockMetadata(x, y, z)));
	}

	@Override
	public boolean canReplace(World world, int x, int y, int z, int side,
			ItemStack itemStack) {
		if (world.getBlock(x, y - 1, z) == Blocks.air)
			return false;

		return isValidPosition(world, x, y, z, itemStack.getItemDamage());
	}

	public void dropIfCantStay(World world, int x, int y, int z, ItemStack stack) {
		if (!this.canReplace(world, x, y, z, 0, stack)) {
			this.dropBlockAsItem(world, x, y, z,
					world.getBlockMetadata(x, y, z), 0);
			world.setBlockToAir(x, y, z);
		}
	}

	@Override
	public void onNeighborBlockChange(World world, int x, int y, int z,
			Block neighborBlock) {
		dropIfCantStay(world, x, y, z, new ItemStack(world.getBlock(x, y, z),
				1, world.getBlockMetadata(x, y, z)));
	}
}