common/universalelectricity/prefab/block/BlockAdvanced.java

package universalelectricity.prefab.block;

import java.lang.reflect.Method;

import net.minecraft.block.Block;
import net.minecraft.block.material.Material;
import net.minecraft.entity.player.EntityPlayer;
import net.minecraft.item.ItemStack;
import net.minecraft.world.World;

/**
 * An advanced block class that is to be extended for wrenching capabilities.
 */
public abstract class BlockAdvanced extends Block
{
	public BlockAdvanced(int id, Material material)
	{
		super(id, material);
		this.setHardness(0.6f);
	}

	/**
	 * DO NOT OVERRIDE THIS FUNCTION! Called when the block is right clicked by the player. This
	 * modified version detects electric items and wrench actions on your machine block. Do not
	 * override this function. Use onMachineActivated instead! (It does the same thing)
	 * 
	 * @param world The World Object.
	 * @param x , y, z The coordinate of the block.
	 * @param side The side the player clicked on.
	 * @param hitX , hitY, hitZ The position the player clicked on relative to the block.
	 */
	@Override
	public boolean onBlockActivated(World world, int x, int y, int z, EntityPlayer entityPlayer, int side, float hitX, float hitY, float hitZ)
	{
		int metadata = world.getBlockMetadata(x, y, z);

		/**
		 * Check if the player is holding a wrench or an electric item. If so, call the wrench
		 * event.
		 */
		if (this.isUsableWrench(entityPlayer, entityPlayer.inventory.getCurrentItem(), x, y, z))
		{
			this.damageWrench(entityPlayer, entityPlayer.inventory.getCurrentItem(), x, y, z);

			if (entityPlayer.isSneaking())
			{
				if (this.onSneakUseWrench(world, x, y, z, entityPlayer, side, hitX, hitY, hitZ))
				{
					return true;
				}
			}

			if (this.onUseWrench(world, x, y, z, entityPlayer, side, hitX, hitY, hitZ))
			{
				return true;
			}
		}

		if (entityPlayer.isSneaking())
		{
			if (this.onSneakMachineActivated(world, x, y, z, entityPlayer, side, hitX, hitY, hitZ))
			{
				return true;
			}
		}

		return this.onMachineActivated(world, x, y, z, entityPlayer, side, hitX, hitY, hitZ);
	}

	/**
	 * A function that denotes if an itemStack is a wrench that can be used. Override this for more
	 * wrench compatibility. Compatible with Buildcraft and IC2 wrench API via reflection.
	 * 
	 * @return True if it is a wrench.
	 */
	public boolean isUsableWrench(EntityPlayer entityPlayer, ItemStack itemStack, int x, int y, int z)
	{
		if (entityPlayer != null && itemStack != null)
		{
			Class wrenchClass = itemStack.getItem().getClass();

			/**
			 * UE and Buildcraft
			 */
			try
			{
				Method methodCanWrench = wrenchClass.getMethod("canWrench", EntityPlayer.class, Integer.TYPE, Integer.TYPE, Integer.TYPE);
				return (Boolean) methodCanWrench.invoke(itemStack.getItem(), entityPlayer, x, y, z);
			}
			catch (NoClassDefFoundError e)
			{
			}
			catch (Exception e)
			{
			}

			/**
			 * Industrialcraft
			 */
			try
			{
				if (wrenchClass == Class.forName("ic2.core.item.tool.ItemToolWrench") || wrenchClass == Class.forName("ic2.core.item.tool.ItemToolWrenchElectric"))
				{
					return itemStack.getItemDamage() < itemStack.getMaxDamage();
				}
			}
			catch (Exception e)
			{
			}
		}

		return false;
	}

	/**
	 * This function damages a wrench. Works with Buildcraft and Industrialcraft wrenches.
	 * 
	 * @return True if damage was successfull.
	 */
	public boolean damageWrench(EntityPlayer entityPlayer, ItemStack itemStack, int x, int y, int z)
	{
		if (this.isUsableWrench(entityPlayer, itemStack, x, y, z))
		{
			Class wrenchClass = itemStack.getItem().getClass();

			/**
			 * UE and Buildcraft
			 */
			try
			{
				Method methodWrenchUsed = wrenchClass.getMethod("wrenchUsed", EntityPlayer.class, Integer.TYPE, Integer.TYPE, Integer.TYPE);
				methodWrenchUsed.invoke(itemStack.getItem(), entityPlayer, x, y, z);
				return true;
			}
			catch (Exception e)
			{
			}

			/**
			 * Industrialcraft
			 */
			try
			{
				if (wrenchClass == Class.forName("ic2.core.item.tool.ItemToolWrench") || wrenchClass == Class.forName("ic2.core.item.tool.ItemToolWrenchElectric"))
				{
					Method methodWrenchDamage = wrenchClass.getMethod("damage", ItemStack.class, Integer.TYPE, EntityPlayer.class);
					methodWrenchDamage.invoke(itemStack.getItem(), itemStack, 1, entityPlayer);
					return true;
				}
			}
			catch (Exception e)
			{
			}
		}

		return false;
	}

	/**
	 * Called when the machine is right clicked by the player
	 * 
	 * @return True if something happens
	 */
	public boolean onMachineActivated(World world, int x, int y, int z, EntityPlayer entityPlayer, int side, float hitX, float hitY, float hitZ)
	{
		return false;
	}

	/**
	 * Called when the machine is being wrenched by a player while sneaking.
	 * 
	 * @return True if something happens
	 */
	public boolean onSneakMachineActivated(World world, int x, int y, int z, EntityPlayer entityPlayer, int side, float hitX, float hitY, float hitZ)
	{
		return false;
	}

	/**
	 * Called when a player uses a wrench on the machine
	 * 
	 * @return True if some happens
	 */
	public boolean onUseWrench(World world, int x, int y, int z, EntityPlayer entityPlayer, int side, float hitX, float hitY, float hitZ)
	{
		return false;
	}

	/**
	 * Called when a player uses a wrench on the machine while sneaking. Only works with the UE
	 * wrench.
	 * 
	 * @return True if some happens
	 */
	public boolean onSneakUseWrench(World world, int x, int y, int z, EntityPlayer entityPlayer, int side, float hitX, float hitY, float hitZ)
	{
		return this.onUseWrench(world, x, y, z, entityPlayer, side, hitX, hitY, hitZ);
	}

}