EssentiaHelper.java

/* 
 * Copyright (c) CovertJaguar, 2014 http://railcraft.info
 * 
 * This code is the property of CovertJaguar
 * and may only be used with explicit written
 * permission unless otherwise specified on the
 * license page at http://railcraft.info/wiki/info:license.
 */
package mods.railcraft.common.plugins.thaumcraft;

import cpw.mods.fml.common.registry.GameRegistry;
import net.minecraft.inventory.IInventory;
import net.minecraft.item.ItemStack;
import thaumcraft.api.aspects.Aspect;
import thaumcraft.api.aspects.AspectList;
import thaumcraft.api.aspects.IEssentiaContainerItem;

/**
 *
 * @author CovertJaguar <http://www.railcraft.info/>
 */
public class EssentiaHelper {

    public static boolean getEssentia(IInventory inv, int slot, Aspect aspect) {
        ItemStack stack = inv.getStackInSlot(slot);

        if (stack != null && stack.getItem() instanceof IEssentiaContainerItem && "item.BlockJarFilledItem".equals(stack.getUnlocalizedName())) {
            IEssentiaContainerItem jar = (IEssentiaContainerItem) stack.getItem();
            AspectList aspects = jar.getAspects(stack);
            if (aspects.getAmount(aspect) > 0) {
                aspects.remove(aspect, 1);
                if (aspects.size() == 0) {
                    ItemStack emptyJar = GameRegistry.findItemStack("Thaumcraft", "blockJar", 1);
                    inv.setInventorySlotContents(slot, emptyJar);
                } else
                    jar.setAspects(stack, aspects);
                return true;
            }
        }
        return false;
    }

}