Paper/Spigot-Server-Patches/0533-added-EntityTargetLivingEntityEvent-to-1.16-mobs.patch

From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: Jake Potrebic <jake.m.potrebic@gmail.com>
Date: Fri, 3 Jul 2020 15:03:33 -0700
Subject: [PATCH] added EntityTargetLivingEntityEvent to 1.16 mobs

1.16 added a different behavior system for the new mobs

diff --git a/src/main/java/net/minecraft/server/BehaviorAttackTargetForget.java b/src/main/java/net/minecraft/server/BehaviorAttackTargetForget.java
index d5cceb0672c7724b9d53dd7bf2d323e667c8617c..2a0e951618e45c3e4e171cbb4d987004ae354803 100644
--- a/src/main/java/net/minecraft/server/BehaviorAttackTargetForget.java
+++ b/src/main/java/net/minecraft/server/BehaviorAttackTargetForget.java
@@ -21,15 +21,22 @@ public class BehaviorAttackTargetForget<E extends EntityInsentient> extends Beha
 
     protected void a(WorldServer worldserver, E e0, long i) {
         if (a((EntityLiving) e0)) {
-            this.d(e0);
+            handleEvent(e0, org.bukkit.event.entity.EntityTargetEvent.TargetReason.FORGOT_TARGET); // Paper
         } else if (this.c(e0)) {
-            this.d(e0);
+            handleEvent(e0, org.bukkit.event.entity.EntityTargetEvent.TargetReason.TARGET_DIED); // Paper
         } else if (this.a(e0)) {
-            this.d(e0);
+            handleEvent(e0, org.bukkit.event.entity.EntityTargetEvent.TargetReason.TARGET_OTHER_LEVEL); // Paper
         } else if (!IEntitySelector.f.test(this.b(e0))) {
-            this.d(e0);
+            handleEvent(e0, org.bukkit.event.entity.EntityTargetEvent.TargetReason.TARGET_INVALID); // Paper
         } else if (this.b.test(this.b(e0))) {
-            this.d(e0);
+            handleEvent(e0, org.bukkit.event.entity.EntityTargetEvent.TargetReason.TARGET_INVALID); // Paper
+        }
+    }
+    // Paper start
+    private void handleEvent(E entity, org.bukkit.event.entity.EntityTargetEvent.TargetReason reason) {
+        org.bukkit.event.entity.EntityTargetLivingEntityEvent event = org.bukkit.craftbukkit.event.CraftEventFactory.callEntityTargetLivingEvent(entity, null, reason);
+        if (!event.isCancelled()) {
+            this.d(entity);
         }
     }
 
diff --git a/src/main/java/net/minecraft/server/BehaviorAttackTargetSet.java b/src/main/java/net/minecraft/server/BehaviorAttackTargetSet.java
index 65e746859bede33bc59fd17b4c3defe911df993f..178da19fdc5df330d4128feb831e8fa6a9a5cdc1 100644
--- a/src/main/java/net/minecraft/server/BehaviorAttackTargetSet.java
+++ b/src/main/java/net/minecraft/server/BehaviorAttackTargetSet.java
@@ -26,20 +26,27 @@ public class BehaviorAttackTargetSet<E extends EntityInsentient> extends Behavio
         if (!this.b.test(e0)) {
             return false;
         } else {
-            Optional<? extends EntityLiving> optional = (Optional) this.c.apply(e0);
+            Optional<? extends EntityLiving> optional = (Optional<? extends EntityLiving>) this.c.apply(e0); // Paper - decompile error
 
             return optional.isPresent() && ((EntityLiving) optional.get()).isAlive();
         }
     }
 
     protected void a(WorldServer worldserver, E e0, long i) {
-        ((Optional) this.c.apply(e0)).ifPresent((entityliving) -> {
+        ((Optional<? extends EntityLiving>) this.c.apply(e0)).ifPresent((entityliving) -> { // Paper - decompile error
             this.a(e0, entityliving);
         });
     }
 
     private void a(E e0, EntityLiving entityliving) {
-        e0.getBehaviorController().setMemory(MemoryModuleType.ATTACK_TARGET, (Object) entityliving);
-        e0.getBehaviorController().removeMemory(MemoryModuleType.CANT_REACH_WALK_TARGET_SINCE);
+        // Paper start
+        org.bukkit.event.entity.EntityTargetEvent.TargetReason reason = entityliving instanceof EntityHuman ? org.bukkit.event.entity.EntityTargetEvent.TargetReason.CLOSEST_PLAYER : org.bukkit.event.entity.EntityTargetEvent.TargetReason.CLOSEST_ENTITY;
+        org.bukkit.event.entity.EntityTargetLivingEntityEvent event =  org.bukkit.craftbukkit.event.CraftEventFactory.callEntityTargetLivingEvent(e0, entityliving, org.bukkit.event.entity.EntityTargetEvent.TargetReason.CLOSEST_ENTITY);
+        if (!event.isCancelled()) {
+            EntityLiving target = event.getTarget() != null ? ((org.bukkit.craftbukkit.entity.CraftLivingEntity) event.getTarget()).getHandle() : null;
+            e0.getBehaviorController().setMemory(MemoryModuleType.ATTACK_TARGET, target); // Paper - decompile error
+            e0.getBehaviorController().removeMemory(MemoryModuleType.CANT_REACH_WALK_TARGET_SINCE);
+        }
+        // Paper end
     }
 }