EntityJoinWorld.java

package greymerk.roguelike;

import java.util.Collection;

import greymerk.roguelike.monster.IEntity;
import greymerk.roguelike.monster.MetaEntity;
import greymerk.roguelike.monster.MonsterProfile;
import net.minecraft.entity.Entity;
import net.minecraft.entity.EntityLiving;
import net.minecraft.entity.monster.EntityMob;
import net.minecraft.entity.monster.EntitySlime;
import net.minecraft.potion.Potion;
import net.minecraft.potion.PotionEffect;
import net.minecraft.world.World;
import net.minecraftforge.event.entity.EntityJoinWorldEvent;
import net.minecraftforge.fml.common.eventhandler.SubscribeEvent;

public class EntityJoinWorld {
	
	@SubscribeEvent
	public void OnEntityJoinWorld(EntityJoinWorldEvent event) {
		
		World world = event.getWorld();
		Entity entity = event.getEntity();
		
		// slimes do not extend EntityMob for some reason
		if(!(entity instanceof EntityMob || entity instanceof EntitySlime)){
			return;
		}
		
		EntityLiving mob = (EntityLiving) entity;
		
		Collection<?> effects = mob.getActivePotionEffects();
		for(Object buff : effects){
			if(Potion.getIdFromPotion(((PotionEffect) buff).getPotion()) == 4){
				int level = ((PotionEffect) buff).getAmplifier();
				
				IEntity metaEntity = new MetaEntity((Entity)mob);
				MonsterProfile.equip(world, world.rand, level, metaEntity);
				if(entity.isDead) event.setCanceled(true);
				return;
			}
		}
	}
}