EpicHeads/main/java/com/songoda/epicheads/economy/ItemEconomy.java

package com.songoda.epicheads.economy;

import com.songoda.epicheads.EpicHeads;
import com.songoda.epicheads.menu.ui.item.Item;
import org.bukkit.entity.Player;
import org.bukkit.inventory.ItemStack;

public class ItemEconomy implements Economy {

	public boolean isItem(ItemStack itemStack) {
		if (itemStack == null)
			return false;
		Item item = Item.create(itemStack).amount(1);
		return item.equals(EpicHeads.getInstance().getMainConfig().getItemEconomyItem());
	}

	@Override
	public String getName() {
		return "Item";
	}

	private int convertAmount(double amount) {
		return (int) Math.ceil(amount);
	}

	@Override
	public String formatBalance(double bal) {
		int amount = convertAmount(bal);

		return Integer.toString(amount);
	}

	@Override
	public boolean tryHook() {
		return true;
	}

	@Override
	public boolean isHooked() {
		return true;
	}

	@Override
	public boolean hasBalance(Player player, double bal) {
		int amount = convertAmount(bal);
		for (ItemStack item : player.getInventory().getContents()) {
			if (!isItem(item))
				continue;
			if (amount <= item.getAmount())
				return true;
			amount -= item.getAmount();
		}
		return false;
	}

	@Override
	public boolean takeBalance(Player player, double bal) {
		int amount = convertAmount(bal);
		ItemStack[] contents = player.getInventory().getContents();
		for (int index = 0; index < contents.length; ++index) {
			ItemStack item = contents[index];
			if (!isItem(item))
				continue;
			if (amount >= item.getAmount()) {
				amount -= item.getAmount();
				contents[index] = null;
			} else {
				item.setAmount(item.getAmount() - amount);
				amount = 0;
			}
			if (amount == 0)
				break;
		}
		if (amount != 0)
			return false;
		player.getInventory().setContents(contents);

		return true;
	}

}