Miscellaneous setup

src/main/java/electroblob/wizardry/util/IElementalDamage.java

@@ -1,6 +1,12 @@
 package electroblob.wizardry.util;
 
+import electroblob.wizardry.registry.WizardryAchievements;
 import electroblob.wizardry.util.MagicDamage.DamageType;
+import net.minecraft.entity.monster.EntityCreeper;
+import net.minecraft.entity.player.EntityPlayer;
+import net.minecraftforge.event.entity.living.LivingAttackEvent;
+import net.minecraftforge.fml.common.Mod;
+import net.minecraftforge.fml.common.eventhandler.SubscribeEvent;
 
 /** This interface allows {@link MagicDamage} and {@link IndirectMagicDamage} to both be treated as instances of a
  * single type so that the damage type field can be accessed, rather than having to deal with each of them separately,
@@ -8,10 +14,34 @@ import electroblob.wizardry.util.MagicDamage.DamageType;
  * need to extend different subclasses of {@link net.minecraft.util.DamageSource DamageSource}).
  * @since Wizardry 1.1
  * @author Electroblob */
+@Mod.EventBusSubscriber
 public interface IElementalDamage {
-	
+
 	DamageType getType();
-	
+
 	boolean isRetaliatory();
-	
+
+	@SubscribeEvent
+	public static void onLivingAttackEvent(LivingAttackEvent event){
+		if(event.getSource() instanceof IElementalDamage){
+			if(MagicDamage.isEntityImmune(((IElementalDamage)event.getSource()).getType(), event.getEntity())){
+				event.setCanceled(true);
+				// I would have liked to have done the 'resist' chat message here, but I overlooked the fact that I
+				// would need an instance of the spell to get its display name!
+				return;
+			}
+			// One convenient side effect of the new damage type system is that I can get rid of all the places where
+			// creepers are charged and just put them here under shock damage - this is precisely the sort of
+			// repetitive code I was trying to get rid of, since errors can (and did!) occur.
+			if(event.getEntityLiving() instanceof EntityCreeper && !((EntityCreeper)event.getEntityLiving()).getPowered()
+					&& ((IElementalDamage)event.getSource()).getType() == DamageType.SHOCK){
+				// Charges creepers when they are hit by shock damage
+				WizardryUtilities.chargeCreeper((EntityCreeper)event.getEntityLiving());
+				// Gives the player that caused the shock damage the 'It's Gonna Blow' achievement
+				if(event.getSource().getEntity() instanceof EntityPlayer){
+					((EntityPlayer)event.getSource().getEntity()).addStat(WizardryAchievements.charge_creeper);
+				}
+			}
+		}
+	}
 }