From 07a2dd9859c5e0c02f021d5a6b4c1c7456ee8ce8 Mon Sep 17 00:00:00 2001
From: hondacrx <prelude_20032002@yahoo.com>
Date: Mon, 4 Sep 2023 13:07:59 -0400
Subject: [PATCH] Core/AI: Implemented OnHealthDepleted hook

Port From (https://github.com/TrinityCore/TrinityCore/commit/ea134c0eae83b4cdbb5f0e941ed867a144bb01f6)
---
 Source/Game/AI/CoreAI/CreatureAI.cs      | 3 +++
 Source/Game/Entities/Unit/Unit.Combat.cs | 3 +++
 Source/Game/Entities/Unit/Unit.cs        | 4 ++++
 3 files changed, 10 insertions(+)

diff --git a/Source/Game/AI/CoreAI/CreatureAI.cs b/Source/Game/AI/CoreAI/CreatureAI.cs
index dac94db2c..d7020c9d1 100644
--- a/Source/Game/AI/CoreAI/CreatureAI.cs
+++ b/Source/Game/AI/CoreAI/CreatureAI.cs
@@ -448,6 +448,9 @@ namespace Game.AI
         // Called for reaction when initially engaged - this will always happen _after_ JustEnteredCombat
         public virtual void JustEngagedWith(Unit who) { }
 
+        // Called when the creature reaches 0 health (or 1 if unkillable).
+        public virtual void OnHealthDepleted(Unit attacker, bool isKill) { }
+
         // Called when the creature is killed
         public virtual void JustDied(Unit killer) { }
 
diff --git a/Source/Game/Entities/Unit/Unit.Combat.cs b/Source/Game/Entities/Unit/Unit.Combat.cs
index dc565de89..09a88b235 100644
--- a/Source/Game/Entities/Unit/Unit.Combat.cs
+++ b/Source/Game/Entities/Unit/Unit.Combat.cs
@@ -942,7 +942,10 @@ namespace Game.Entities
                 // Call creature just died function
                 CreatureAI ai = creature.GetAI();
                 if (ai != null)
+                {
+                    ai.OnHealthDepleted(attacker, true);
                     ai.JustDied(attacker);
+                }
 
                 TempSummon summon = creature.ToTempSummon();
                 if (summon != null)
diff --git a/Source/Game/Entities/Unit/Unit.cs b/Source/Game/Entities/Unit/Unit.cs
index 02ab8eb3d..bd55e43b1 100644
--- a/Source/Game/Entities/Unit/Unit.cs
+++ b/Source/Game/Entities/Unit/Unit.cs
@@ -2672,6 +2672,10 @@ namespace Game.Entities
             else if (victim.IsCreature() && damageTaken >= health && victim.ToCreature().HasFlag(CreatureStaticFlags.Unkillable))
             {
                 damageTaken = health - 1;
+
+                // If we had damage (aka health was not 1 already) trigger OnHealthDepleted
+                if (damageTaken > 0)
+                    victim.ToCreature().GetAI()?.OnHealthDepleted(attacker, false);
             }
             else if (victim.IsVehicle() && damageTaken >= (health - 1) && victim.GetCharmer() != null && victim.GetCharmer().IsTypeId(TypeId.Player))
             {