smitty.java

package com.kierdavis.nvg;

import java.util.logging.Logger;

import org.bukkit.Material;
import org.bukkit.entity.HumanEntity;
import org.bukkit.event.EventHandler;
import org.bukkit.event.Listener;
import org.bukkit.event.inventory.InventoryClickEvent;
import org.bukkit.event.inventory.InventoryType.SlotType;
import org.bukkit.potion.PotionEffect;
import org.bukkit.potion.PotionEffectType;

public class NVGListener implements Listener {
	@EventHandler
	public void onInventoryClick(InventoryClickEvent event) {
		Logger.getLogger("Minecraft").fine("InventoryClickEvent:");
		
		if (event.getSlotType() == SlotType.ARMOR && event.getSlot() == 39) {
			Logger.getLogger("Minecraft").fine("  Correct armour slot");
			HumanEntity clicker = event.getWhoClicked();
			
			if (event.getCursor().getType() == Material.PUMPKIN && event.getCurrentItem().getType() != Material.PUMPKIN) {
				Logger.getLogger("Minecraft").fine("  Applying potion effect");
				PotionEffect effect = new PotionEffect(PotionEffectType.NIGHT_VISION, 1000000, 100);
				clicker.addPotionEffect(effect);
			}
			if (event.getCursor().getType() != Material.PUMPKIN && event.getCurrentItem().getType() == Material.PUMPKIN) {
				Logger.getLogger("Minecraft").fine("  Removing potion effect");
				clicker.removePotionEffect(PotionEffectType.NIGHT_VISION);
			}
		}
	}
}