FastTNT

FastTNT.java

package com.github.jikoo.fasttnt;

import java.util.HashMap;

import org.bukkit.ChatColor;
import org.bukkit.Material;
import org.bukkit.command.Command;
import org.bukkit.command.CommandSender;
import org.bukkit.entity.Player;
import org.bukkit.inventory.ItemStack;
import org.bukkit.plugin.java.JavaPlugin;

/**
 * Just for fun!
 * 
 * @author Jikoo
 */
public class FastTNT extends JavaPlugin {

	@Override
	public boolean onCommand(CommandSender sender, Command command, String label, String[] args) {
		if (!(sender instanceof Player)) {
			sender.sendMessage("FastTNT does not offer console support at this time, sorry!");
			return true;
		}
		Player player = (Player) sender;
		// Total tnt that can be made with the materials in inventory first
		int tntSand = sum(player.getInventory().all(Material.SAND)) / 4;
		int tntGunpowder = sum(player.getInventory().all(Material.SULPHUR)) / 5;
		// Set total based on limiting factor
		int tnt = tntSand <= tntGunpowder ? tntSand : tntGunpowder;
		// Define total quantity that must be removed
		tntSand = tnt * 4;
		tntGunpowder = tnt * 5;

		// Remove sand from Player
		ItemStack is = new ItemStack(Material.SAND, 64);
		while (tntSand > 0) {
			if (tntSand <= 64) {
				is.setAmount(tntSand);
				tntSand = 0;
			} else {
				tntSand -= 64;
			}
			int failures = sum(player.getInventory().removeItem(is));
			if (failures > 0) {
				// If the player has no plain sand left, they must have red sand.
				is = new ItemStack(Material.SAND, failures, (short) 1);
				player.getInventory().removeItem(is);
			}
		}

		// Remove sulpher (gunpowder) from Player
		is.setType(Material.SULPHUR);
		is.setAmount(64);
		while (tntGunpowder > 0) {
			if (tntGunpowder <= 64) {
				is.setAmount(tntGunpowder);
				tntGunpowder = 0;
			} else {
				tntGunpowder -= 64;
			}
			player.getInventory().removeItem(is);
		}

		player.sendMessage(ChatColor.GREEN + "Crafted " + tnt + " TNT!");

		// Add TNT to Player
		is.setType(Material.TNT);
		is.setAmount(64);
		while (tnt > 0) {
			if (tnt <= 64) {
				is.setAmount(tnt);
				tnt = 0;
			} else {
				// In case of a massive addition failure, reset stack to 64 each round
				is.setAmount(64);
				tnt -= 64;
			}
			int failure = sum(player.getInventory().addItem(is));
			// Hypothetical situation: Player has 7 sand, 6 gunpowder, inv is full of non-tnt items.
			// Drop items at Player location rather than just delete resources.
			is.setAmount(failure);
			if (failure > 0) {
				player.getWorld().dropItem(player.getLocation(), is);
			}
		}

		return true;
	}

	private int sum(HashMap<Integer, ? extends ItemStack> hashMap) {
		int sum = 0;
		for (ItemStack is : hashMap.values()) {
			sum += is.getAmount();
		}
		return sum;
	}
}

plugin.yml

name: FastTNT
main: com.github.jikoo.fasttnt.FastTNT
version: 1.1
author: Jikoo

commands:
 fasttnt:
  default: false
  description: Craft TNT in a jiffy!
  permission: fasttnt.use
  aliases: [ftnt, tnt, ctnt]