Core/Scripts: Implemented OnlyOnceAreaTriggerScript

Port From (https://github.com/TrinityCore/TrinityCore/commit/fe938b99f843df3f6c120695db38f327bd55ea94)

Source/Game/Maps/Instances/InstanceScript.cs

@@ -872,11 +872,16 @@ namespace Game.Maps
         public uint GetCompletedEncounterMask() { return completedEncounters; }
 
         // Sets a temporary entrance that does not get saved to db
-        void SetTemporaryEntranceLocation(uint worldSafeLocationId) { _temporaryEntranceId = worldSafeLocationId; }
+        public void SetTemporaryEntranceLocation(uint worldSafeLocationId) { _temporaryEntranceId = worldSafeLocationId; }
 
         // Get's the current entrance id
         public uint GetEntranceLocation() { return _temporaryEntranceId != 0 ? _temporaryEntranceId : _entranceId; }
 
+        // Only used by areatriggers that inherit from OnlyOnceAreaTriggerScript
+        public void MarkAreaTriggerDone(uint id) { _activatedAreaTriggers.Add(id); }
+        public void ResetAreaTriggerDone(uint id) { _activatedAreaTriggers.Remove(id); }
+        public bool IsAreaTriggerDone(uint id) { return _activatedAreaTriggers.Contains(id); }
+        
         public virtual void FillInitialWorldStates(InitWorldStates data) { }
 
         public int GetEncounterCount() { return bosses.Count; }
@@ -909,6 +914,7 @@ namespace Game.Maps
         Dictionary<uint, ObjectGuid> _objectGuids = new Dictionary<uint, ObjectGuid>();
         uint completedEncounters;
         List<InstanceSpawnGroupInfo> _instanceSpawnGroups = new List<InstanceSpawnGroupInfo>();
+        List<uint> _activatedAreaTriggers = new List<uint>();
         uint _entranceId;
         uint _temporaryEntranceId;
         uint _combatResurrectionTimer;

Source/Game/Scripting/CoreScripts.cs

@@ -366,6 +366,39 @@ namespace Game.Scripting
         public virtual bool OnTrigger(Player player, AreaTriggerRecord trigger, bool entered) { return false; }
     }
 
+    public class OnlyOnceAreaTriggerScript : AreaTriggerScript
+    {
+        public OnlyOnceAreaTriggerScript(string name) : base(name) { }
+
+        public override bool OnTrigger(Player player, AreaTriggerRecord trigger, bool entered)
+        {
+            uint triggerId = trigger.Id;
+            InstanceScript instance = player.GetInstanceScript();
+            if (instance != null)
+            {
+                if (instance.IsAreaTriggerDone(triggerId))
+                    return true;
+                else
+                    instance.MarkAreaTriggerDone(triggerId);
+            }
+            return _OnTrigger(player, trigger, entered);
+        }
+
+        void ResetAreaTriggerDone(InstanceScript script, uint triggerId)
+        {
+            script.ResetAreaTriggerDone(triggerId);
+        }
+
+        void ResetAreaTriggerDone(Player player, AreaTriggerRecord trigger)
+        {
+            InstanceScript instance = player.GetInstanceScript();
+            if (instance != null)
+                ResetAreaTriggerDone(instance, trigger.Id);
+        }
+
+        public virtual bool _OnTrigger(Player player, AreaTriggerRecord trigger, bool entered) { return false; }
+    }
+    
     public class BattlegroundScript : ScriptObject
     {
         public BattlegroundScript(string name) : base(name)

Source/Scripts/Northrend/AzjolNerub/AzjolNerub/BossKrikthirTheGatewatcher.cs

@@ -186,9 +186,9 @@ namespace Scripts.Northrend.AzjolNerub.AzjolNerub.KrikthirTheGatewatcher
             switch (action)
             {
                 case -ANInstanceMisc.ActionGatewatcherGreet:
-                    if (!_hadGreet && me.IsAlive() && !me.IsInCombat() && !_petsInCombat)
+                    if (instance.GetData(ANDataTypes.GatewatcherGreet) == 0 && me.IsAlive() && !me.IsInCombat() && !_petsInCombat)
                     {
-                        _hadGreet = true;
+                        instance.SetData(ANDataTypes.GatewatcherGreet, 1);
                         Talk(TextIds.SayPrefight);
                     }
                     break;
@@ -277,7 +277,6 @@ namespace Scripts.Northrend.AzjolNerub.AzjolNerub.KrikthirTheGatewatcher
                 Talk(TextIds.SaySendGroup);
         }
 
-        bool _hadGreet;
         bool _hadFrenzy;
         bool _petsInCombat;
         byte _watchersActive;

Source/Scripts/Northrend/AzjolNerub/AzjolNerub/InstanceAzjolNerub.cs

@@ -35,6 +35,7 @@ namespace Scripts.Northrend.AzjolNerub.AzjolNerub
         public const uint WatcherSilthik = 5;
         public const uint AnubarakWall = 6;
         public const uint AnubarakWall2 = 7;
+        public const uint GatewatcherGreet = 8;
     }
 
     struct ANCreatureIds
@@ -103,6 +104,8 @@ namespace Scripts.Northrend.AzjolNerub.AzjolNerub
 
         class instance_azjol_nerub_InstanceScript : InstanceScript
         {
+            uint _gateWatcherGreet;
+
             public instance_azjol_nerub_InstanceScript(InstanceMap map) : base(map)
             {
                 SetHeaders(ANInstanceMisc.DataHeader);
@@ -134,7 +137,30 @@ namespace Scripts.Northrend.AzjolNerub.AzjolNerub
 
                 return true;
             }
-    }
+
+            public override uint GetData(uint dataId)
+            {
+                switch (dataId)
+                {
+                    case ANDataTypes.GatewatcherGreet:
+                        return _gateWatcherGreet;
+                    default:
+                        return 0;
+                }
+            }
+
+            public override void SetData(uint dataId, uint value)
+            {
+                switch (dataId)
+                {
+                    case ANDataTypes.GatewatcherGreet:
+                        _gateWatcherGreet = value;
+                        break;
+                    default:
+                        break;
+                }
+            }
+        }
 
         public override InstanceScript GetInstanceScript(InstanceMap map)
         {