From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: Jake Potrebic <jake.m.potrebic@gmail.com>
Date: Wed, 2 Dec 2020 21:03:02 -0800
Subject: [PATCH] Add config for mobs immune to default effects


diff --git a/src/main/java/net/minecraft/world/entity/LivingEntity.java b/src/main/java/net/minecraft/world/entity/LivingEntity.java
index 3a669f8e0cd072fcbd5e5ed4b55abb0f73c009e7..38b0bde34420734c50fe23aa169af82a7de4e1c2 100644
--- a/src/main/java/net/minecraft/world/entity/LivingEntity.java
+++ b/src/main/java/net/minecraft/world/entity/LivingEntity.java
@@ -1164,7 +1164,7 @@ public abstract class LivingEntity extends Entity implements Attackable {
         if (this.getMobType() == MobType.UNDEAD) {
             MobEffect mobeffectlist = effect.getEffect();
 
-            if (mobeffectlist == MobEffects.REGENERATION || mobeffectlist == MobEffects.POISON) {
+            if ((mobeffectlist == MobEffects.REGENERATION || mobeffectlist == MobEffects.POISON) && this.level.paperConfig().entities.mobEffects.undeadImmuneToCertainEffects) { // Paper
                 return false;
             }
         }
diff --git a/src/main/java/net/minecraft/world/entity/boss/wither/WitherBoss.java b/src/main/java/net/minecraft/world/entity/boss/wither/WitherBoss.java
index 9adff51029781795c2cdf479a89111b3a1f102c0..3d3567e09ddf0982dfa6b2279019168a6f4abaaa 100644
--- a/src/main/java/net/minecraft/world/entity/boss/wither/WitherBoss.java
+++ b/src/main/java/net/minecraft/world/entity/boss/wither/WitherBoss.java
@@ -605,7 +605,7 @@ public class WitherBoss extends Monster implements PowerableMob, RangedAttackMob
 
     @Override
     public boolean canBeAffected(MobEffectInstance effect) {
-        return effect.getEffect() == MobEffects.WITHER ? false : super.canBeAffected(effect);
+        return effect.getEffect() == MobEffects.WITHER && this.level.paperConfig().entities.mobEffects.immuneToWitherEffect.wither ? false : super.canBeAffected(effect); // Paper
     }
 
     private class WitherDoNothingGoal extends Goal {
diff --git a/src/main/java/net/minecraft/world/entity/monster/Spider.java b/src/main/java/net/minecraft/world/entity/monster/Spider.java
index b9acef460ff7e8bc9e24997771beeba6bea1f28a..dd7c7fb6ed3086b1439499df806cdb84ce7d6eb2 100644
--- a/src/main/java/net/minecraft/world/entity/monster/Spider.java
+++ b/src/main/java/net/minecraft/world/entity/monster/Spider.java
@@ -133,7 +133,7 @@ public class Spider extends Monster {
 
     @Override
     public boolean canBeAffected(MobEffectInstance effect) {
-        return effect.getEffect() == MobEffects.POISON ? false : super.canBeAffected(effect);
+        return effect.getEffect() == MobEffects.POISON && this.level.paperConfig().entities.mobEffects.spidersImmuneToPoisonEffect ? false : super.canBeAffected(effect); // Paper
     }
 
     public boolean isClimbing() {
diff --git a/src/main/java/net/minecraft/world/entity/monster/WitherSkeleton.java b/src/main/java/net/minecraft/world/entity/monster/WitherSkeleton.java
index ea6233cb3ca30864e54d553a5d1071ea9147a868..6449213d717271bcc516e393a78dfe1e5c762d68 100644
--- a/src/main/java/net/minecraft/world/entity/monster/WitherSkeleton.java
+++ b/src/main/java/net/minecraft/world/entity/monster/WitherSkeleton.java
@@ -123,6 +123,6 @@ public class WitherSkeleton extends AbstractSkeleton {
 
     @Override
     public boolean canBeAffected(MobEffectInstance effect) {
-        return effect.getEffect() == MobEffects.WITHER ? false : super.canBeAffected(effect);
+        return effect.getEffect() == MobEffects.WITHER && this.level.paperConfig().entities.mobEffects.immuneToWitherEffect.witherSkeleton ? false : super.canBeAffected(effect); // Paper
     }
 }