ElectricItemHelper.java

package micdoodle8.mods.galacticraft.api.item;

import net.minecraft.item.Item;
import net.minecraft.item.ItemStack;

/**
 * Some helper functions for electric items.
 *
 * @author Calclavia
 */
public class ElectricItemHelper
{
    /**
     * Recharges an electric item.
     *
     * @param joules - The joules being provided to the electric item
     * @return The total amount of joules provided by the provider.
     */
    public static float chargeItem(ItemStack itemStack, float joules)
    {
        if (itemStack != null)
        {
            if (itemStack.getItem() instanceof IItemElectric)
            {
                return ((IItemElectric) itemStack.getItem()).recharge(itemStack, Math.min(((IItemElectric) itemStack.getItem()).getTransfer(itemStack), joules), true);
            }
        }

        return 0;
    }

    /**
     * Decharges an electric item.
     *
     * @param joules - The joules being withdrawn from the electric item
     * @return The total amount of joules the provider received.
     */
    public static float dischargeItem(ItemStack itemStack, float joules)
    {
        if (itemStack != null)
        {
            if (itemStack.getItem() instanceof IItemElectric)
            {
                return ((IItemElectric) itemStack.getItem()).discharge(itemStack, Math.min(((IItemElectric) itemStack.getItem()).getMaxElectricityStored(itemStack), joules), true);
            }
        }

        return 0;
    }

    /**
     * Returns an uncharged version of the electric item. Use this if you want
     * the crafting recipe to use a charged version of the electric item instead
     * of an empty version of the electric item
     *
     * @return An electrical ItemStack with a specific charge.
     */
    public static ItemStack getWithCharge(ItemStack itemStack, float joules)
    {
        if (itemStack != null)
        {
            if (itemStack.getItem() instanceof IItemElectric)
            {
                ((IItemElectric) itemStack.getItem()).setElectricity(itemStack, joules);
                return itemStack;
            }
        }

        return itemStack;
    }

    public static ItemStack getWithCharge(Item item, float joules)
    {
        return ElectricItemHelper.getWithCharge(new ItemStack(item), joules);
    }

    public static ItemStack getCloneWithCharge(ItemStack itemStack, float joules)
    {
        return ElectricItemHelper.getWithCharge(itemStack.copy(), joules);
    }

    public static ItemStack getUncharged(ItemStack itemStack)
    {
        return ElectricItemHelper.getWithCharge(itemStack, 0);
    }

    public static ItemStack getUncharged(Item item)
    {
        return ElectricItemHelper.getUncharged(new ItemStack(item));
    }
}