Core/Creatures: Implement StringId for Creatures, a custom identifier to make finding specific creatures in script easier

Port From (https://github.com/TrinityCore/TrinityCore/commit/61c51b76c00d932a9180bc6781a244dc18375ef7)

Source/Game/Entities/Creature/Creature.Fields.cs

@@ -27,6 +27,9 @@ namespace Game.Entities
         CreatureTemplate m_creatureInfo;
         CreatureData m_creatureData;
 
+        string[] m_stringIds = new string[3];
+        string m_scriptStringId;
+
         SpellFocusInfo _spellFocusInfo;
 
         long _lastDamagedTime; // Part of Evade mechanics

Source/Game/Entities/Creature/Creature.cs

@@ -433,6 +433,8 @@ namespace Game.Entities
             //We must update last scriptId or it looks like we reloaded a script, breaking some things such as gossip temporarily
             LastUsedScriptID = GetScriptId();
 
+            m_stringIds[0] = cInfo.StringId;
+
             return true;
         }
 
@@ -2759,6 +2761,27 @@ namespace Game.Entities
             return Global.ObjectMgr.GetCreatureTemplate(GetEntry()) != null ? Global.ObjectMgr.GetCreatureTemplate(GetEntry()).ScriptID : 0;
         }
 
+        public bool HasStringId(string id)
+        {
+            return m_stringIds.Contains(id);
+        }
+
+        void SetScriptStringId(string id)
+        {
+            if (!id.IsEmpty())
+            {
+                m_scriptStringId = id;
+                m_stringIds[2] = m_scriptStringId;
+            }
+            else
+            {
+                m_scriptStringId = null;
+                m_stringIds[2] = null;
+            }
+        }
+
+        public string[] GetStringIds() { return m_stringIds; }
+        
         public VendorItemData GetVendorItems()
         {
             return Global.ObjectMgr.GetNpcVendorItemList(GetEntry());
@@ -3293,6 +3316,8 @@ namespace Game.Entities
             // checked at creature_template loading
             DefaultMovementType = (MovementGeneratorType)data.movementType;
 
+            m_stringIds[1] = data.StringId;
+
             if (addToMap && !GetMap().AddToMap(this))
                 return false;
             return true;

Source/Game/Entities/Creature/CreatureData.cs

@@ -92,6 +92,7 @@ namespace Game.Entities
         public uint SpellSchoolImmuneMask;
         public CreatureFlagsExtra FlagsExtra;
         public uint ScriptID;
+        public string StringId;
 
         public QueryCreatureResponse QueryData;
 

Source/Game/Entities/Object/WorldObject.cs

@@ -1666,8 +1666,9 @@ namespace Game.Entities
 
         public Creature FindNearestCreatureWithOptions(float range, FindCreatureOptions options)
         {
-            var checker = new NearestCreatureEntryWithLiveStateAndAuraInObjectRangeCheck(this, range, options);
-            var searcher = new CreatureLastSearcher(this, checker);
+            NearestCheckCustomizer checkCustomizer = new(this, range);
+            CreatureWithOptionsInObjectRangeCheck<NearestCheckCustomizer> checker = new(this, checkCustomizer, options);
+            CreatureLastSearcher searcher = new(this, checker);
             if (options.IgnorePhases)
                 searcher.i_phaseShift = PhasingHandler.GetAlwaysVisiblePhaseShift();
 
@@ -2571,7 +2572,6 @@ namespace Game.Entities
             SendMessageToSet(cancelSpellVisualKit, true);
         }
 
-
         // function based on function Unit::CanAttack from 13850 client
         public bool IsValidAttackTarget(WorldObject target, SpellInfo bySpell = null)
         {
@@ -2883,7 +2883,7 @@ namespace Game.Entities
         {
             return spellInfo.GetSpellXSpellVisualId(this);
         }
-
+        
         public List<GameObject> GetGameObjectListWithEntryInGrid(uint entry = 0, float maxSearchRange = 250.0f)
         {
             List<GameObject> gameobjectList = new();
@@ -2904,6 +2904,20 @@ namespace Game.Entities
             return creatureList;
         }
 
+        public List<Creature> GetCreatureListWithOptionsInGrid(float maxSearchRange, FindCreatureOptions options)
+        {
+            List<Creature> creatureList = new();
+            NoopCheckCustomizer checkCustomizer = new();
+            CreatureWithOptionsInObjectRangeCheck<NoopCheckCustomizer> check = new(this, checkCustomizer, options);
+            CreatureListSearcher searcher = new(this, creatureList, check);
+            if (options.IgnorePhases)
+                searcher.i_phaseShift = PhasingHandler.GetAlwaysVisiblePhaseShift();
+
+            Cell.VisitGridObjects(this, searcher, maxSearchRange);
+            return creatureList;
+        }
+
+
         public List<Unit> GetPlayerListInGrid(float maxSearchRange, bool alive = true)
         {
             List<Unit> playerList = new();
@@ -4050,6 +4064,7 @@ namespace Game.Entities
     public struct FindCreatureOptions
     {
         public FindCreatureOptions SetCreatureId(uint creatureId) { CreatureId = creatureId; return this; }
+        public FindCreatureOptions SetStringId(string stringId) { StringId = stringId; return this; }
 
         public FindCreatureOptions SetIsAlive(bool isAlive) { IsAlive = isAlive; return this; }
         public FindCreatureOptions SetIsInCombat(bool isInCombat) { IsInCombat = isInCombat; return this; }
@@ -4067,6 +4082,7 @@ namespace Game.Entities
         public FindCreatureOptions SetPrivateObjectOwner(ObjectGuid privateObjectOwnerGuid) { PrivateObjectOwnerGuid = privateObjectOwnerGuid; return this; }
 
         public uint? CreatureId;
+        public string StringId;
 
         public bool? IsAlive;
         public bool? IsInCombat;