Core/AI: Implement OnAuraApplied and OnAuraRemoved hooks

Port From (https://github.com/TrinityCore/TrinityCore/commit/d1e07ac6553c7ae1e3296fc044247f0d0f95d267)

Source/Framework/Constants/SmartAIConst.cs

@@ -232,6 +232,8 @@ namespace Framework.Constants
         OnDespawn = 86,      // NONE
         SendEventTrigger = 87, // NONE
         AreatriggerExit = 88,      // None
+        OnAuraApplied = 89,      // SpellID, CooldownMin, CooldownMax
+        OnAuraRemoved = 90,      // SpellID, CooldownMin, CooldownMax
 
         End
     }

Source/Game/AI/CoreAI/CreatureAI.cs

@@ -297,7 +297,7 @@ namespace Game.AI
 
             if (!me.IsTapListNotClearedOnEvade())
                 me.SetTappedBy(null);
-            
+
             me.ResetPlayerDamageReq();
             me.SetLastDamagedTime(0);
             me.SetCannotReachTarget(false);
@@ -494,6 +494,12 @@ namespace Game.AI
         // Called when a channeled spell finishes
         public virtual void OnChannelFinished(SpellInfo spell) { }
 
+        // Called when aura is applied
+        public virtual void OnAuraApplied(AuraApplication aurApp) { }
+
+        // Called when aura is removed
+        public virtual void OnAuraRemoved(AuraApplication aurApp) { }
+
         // Should return true if the NPC is currently being escorted
         public virtual bool IsEscorted() { return false; }
 

Source/Game/AI/SmartScripts/SmartAI.cs

@@ -642,6 +642,16 @@ namespace Game.AI
             GetScript().ProcessEventsFor(SmartEvents.OnSpellStart, null, 0, 0, false, spellInfo);
         }
 
+        public override void OnAuraApplied(AuraApplication aurApp)
+        {
+            GetScript().ProcessEventsFor(SmartEvents.OnAuraApplied, null, 0, 0, false, aurApp.GetBase().GetSpellInfo());
+        }
+
+        public override void OnAuraRemoved(AuraApplication aurApp)
+        {
+            GetScript().ProcessEventsFor(SmartEvents.OnAuraRemoved, null, 0, 0, false, aurApp.GetBase().GetSpellInfo());
+        }
+
         public override void DamageTaken(Unit attacker, ref uint damage, DamageEffectType damageType, SpellInfo spellInfo = null)
         {
             GetScript().ProcessEventsFor(SmartEvents.Damaged, attacker, damage);

Source/Game/AI/SmartScripts/SmartAIManager.cs

@@ -628,6 +628,8 @@ namespace Game.AI
                 SmartEvents.OnSpellCast => Marshal.SizeOf(typeof(SmartEvent.SpellCast)),
                 SmartEvents.OnSpellFailed => Marshal.SizeOf(typeof(SmartEvent.SpellCast)),
                 SmartEvents.OnSpellStart => Marshal.SizeOf(typeof(SmartEvent.SpellCast)),
+                SmartEvents.OnAuraApplied => Marshal.SizeOf(typeof(SmartEvent.SpellCast)),
+                SmartEvents.OnAuraRemoved => Marshal.SizeOf(typeof(SmartEvent.SpellCast)),
                 SmartEvents.OnDespawn => 0,
                 SmartEvents.SendEventTrigger => 0,
                 SmartEvents.AreatriggerExit => 0,
@@ -1056,6 +1058,8 @@ namespace Game.AI
                     case SmartEvents.OnSpellCast:
                     case SmartEvents.OnSpellFailed:
                     case SmartEvents.OnSpellStart:
+                    case SmartEvents.OnAuraApplied:
+                    case SmartEvents.OnAuraRemoved:
                     {
                         if (!IsSpellValid(e, e.Event.spellCast.spell))
                             return false;
@@ -2587,6 +2591,8 @@ namespace Game.AI
                 SmartEvents.OnDespawn => SmartScriptTypeMaskId.Creature,
                 SmartEvents.SendEventTrigger => SmartScriptTypeMaskId.Event,
                 SmartEvents.AreatriggerExit => SmartScriptTypeMaskId.Areatrigger + SmartScriptTypeMaskId.AreatrigggerEntity,
+                SmartEvents.OnAuraApplied => SmartScriptTypeMaskId.Creature,
+                SmartEvents.OnAuraRemoved => SmartScriptTypeMaskId.Creature,
                 _ => 0,
             };
 

Source/Game/AI/SmartScripts/SmartScript.cs

@@ -3500,6 +3500,8 @@ namespace Game.AI
                 case SmartEvents.OnSpellCast:
                 case SmartEvents.OnSpellFailed:
                 case SmartEvents.OnSpellStart:
+                case SmartEvents.OnAuraApplied:
+                case SmartEvents.OnAuraRemoved:
                 {
                     if (spell == null)
                         return;

Source/Game/Spells/Auras/Aura.cs

@@ -1486,6 +1486,19 @@ namespace Game.Spells
                     }
                     break;
             }
+
+            Creature creature = target.ToCreature();
+            if (creature != null)
+            {
+                var ai = creature.GetAI();
+                if (ai != null)
+                {
+                    if (apply)
+                        ai.OnAuraApplied(aurApp);
+                    else
+                        ai.OnAuraRemoved(aurApp);
+                }
+            }
         }
 
         bool CanBeAppliedOn(Unit target)