Core/Auras: Implemented SPELL_AURA_TRIGGER_SPELL_ON_HEALTH_PCT

Port From (https://github.com/TrinityCore/TrinityCore/commit/b221f4b37251db2206dd14d46c00f1b6f1f16480)

Source/Framework/Constants/Spells/SpellAuraConst.cs

@@ -545,6 +545,18 @@ namespace Framework.Constants
         RealOrReapplyMask = (Reapply | Real)
     }
 
+    public enum AuraTriggerOnPowerChangeDirection
+    {
+        Gain = 0,
+        Loss = 1
+    }
+
+    public enum AuraTriggerOnHealthChangeDirection
+    {
+        Above = 0,
+        Below = 1,
+    }
+
     // Diminishing Returns Types
     public enum DiminishingReturnsType
     {
@@ -578,10 +590,4 @@ namespace Framework.Constants
         Level4 = 3,
         TauntImmune = 4
     }
-
-    public enum AuraTriggerOnPowerChangeDirection
-    {
-        Gain = 0,
-        Loss = 1
-    }
 }

Source/Game/Entities/Unit/Unit.cs

@@ -242,13 +242,13 @@ namespace Game.Entities
             _spellHistory.Update();
         }
 
-        public void HandleEmoteCommand(Emote animId, Player target = null, uint[] spellVisualKitIds = null)
+        public void HandleEmoteCommand(Emote emoteId, Player target = null, uint[] spellVisualKitIds = null)
         {
             EmoteMessage packet = new();
             packet.Guid = GetGUID();
-            packet.EmoteID = (uint)animId;
+            packet.EmoteID = (uint)emoteId;
 
-            var emotesEntry = CliDB.EmotesStorage.LookupByKey(animId);
+            var emotesEntry = CliDB.EmotesStorage.LookupByKey(emoteId);
             if (emotesEntry != null && spellVisualKitIds != null)
                 if (emotesEntry.AnimId == (uint)Anim.MountSpecial || emotesEntry.AnimId == (uint)Anim.MountSelfSpecial)
                     packet.SpellVisualKitIDs.AddRange(spellVisualKitIds);
@@ -2880,6 +2880,32 @@ namespace Game.Entities
             return gain;
         }
 
+        void TriggerOnHealthChangeAuras(ulong oldVal, ulong newVal)
+        {
+            foreach (AuraEffect effect in GetAuraEffectsByType(AuraType.TriggerSpellOnHealthPct))
+            {
+                int triggerHealthPct = effect.GetAmount();
+                uint triggerSpell = effect.GetSpellEffectInfo().TriggerSpell;
+                ulong threshold = CountPctFromMaxHealth(triggerHealthPct);
+
+                switch ((AuraTriggerOnHealthChangeDirection)effect.GetMiscValue())
+                {
+                    case AuraTriggerOnHealthChangeDirection.Above:
+                        if (newVal < threshold || oldVal > threshold)
+                            continue;
+                        break;
+                    case AuraTriggerOnHealthChangeDirection.Below:
+                        if (newVal > threshold || oldVal < threshold)
+                            continue;
+                        break;
+                    default:
+                        break;
+                }
+
+                CastSpell(this, triggerSpell, new CastSpellExtraArgs(effect));
+            }
+        }
+
         public bool IsImmuneToAll() { return IsImmuneToPC() && IsImmuneToNPC(); }
 
         public void SetImmuneToAll(bool apply, bool keepCombat)

Source/Game/Spells/Auras/AuraEffect.cs

@@ -3538,6 +3538,33 @@ namespace Game.Spells
             target.ModifyPower(powerType, change);
         }
 
+        [AuraEffectHandler(AuraType.TriggerSpellOnHealthPct)]
+        void HandleTriggerSpellOnHealthPercent(AuraApplication aurApp, AuraEffectHandleModes mode, bool apply)
+        {
+            if (!mode.HasFlag(AuraEffectHandleModes.Real) || !apply)
+                return;
+
+            Unit target = aurApp.GetTarget();
+            int thresholdPct = GetAmount();
+            uint triggerSpell = GetSpellEffectInfo().TriggerSpell;
+
+            switch ((AuraTriggerOnHealthChangeDirection)GetMiscValue())
+            {
+                case AuraTriggerOnHealthChangeDirection.Above:
+                    if (!target.HealthAbovePct(thresholdPct))
+                        return;
+                    break;
+                case AuraTriggerOnHealthChangeDirection.Below:
+                    if (!target.HealthBelowPct(thresholdPct))
+                        return;
+                    break;
+                default:
+                    break;
+            }
+
+            target.CastSpell(target, triggerSpell, new CastSpellExtraArgs(this));
+        }
+
         /********************************/
         /***          FIGHT           ***/
         /********************************/