Core/Creatures: Implemented sending different creature id for summoner

Port From (https://github.com/TrinityCore/TrinityCore/commit/ebf1b6eb5cbfd1dc8f1b0d26c29ae1423784cabb)

Source/Game/Entities/Creature/CreatureData.cs

@@ -410,6 +410,13 @@ namespace Game.Entities
         }
     }
 
+    public class CreatureSummonedData
+    {
+        public uint? CreatureIDVisibleToSummoner;
+        public uint? GroundMountDisplayID;
+        public uint? FlyingMountDisplayID;
+    }
+
     public class CreatureAddon
     {
         public uint path_id;

Source/Game/Entities/Object/Update/UpdateFields.cs

@@ -37,7 +37,7 @@ namespace Game.Entities
 
         public void WriteCreate(WorldPacket data, UpdateFieldFlag fieldVisibilityFlags, WorldObject owner, Player receiver)
         {
-            data.WriteUInt32(EntryId);
+            data.WriteUInt32(GetViewerDependentEntryId(this, owner, receiver));
             data.WriteUInt32(GetViewerDependentDynamicFlags(this, owner, receiver));
             data.WriteFloat(Scale);
         }
@@ -56,7 +56,7 @@ namespace Game.Entities
             {
                 if (changesMask[1])
                 {
-                    data.WriteUInt32(EntryId);
+                    data.WriteUInt32(GetViewerDependentEntryId(this, owner, receiver));
                 }
                 if (changesMask[2])
                 {
@@ -77,6 +77,21 @@ namespace Game.Entities
             _changesMask.ResetAll();
         }
 
+        uint GetViewerDependentEntryId(ObjectFieldData objectData, WorldObject obj, Player receiver)
+        {
+            uint entryId = objectData.EntryId;
+            Unit unit = obj.ToUnit();
+            if (unit != null)
+            {
+                TempSummon summon = unit.ToTempSummon();
+                if (summon != null)
+                    if (summon.GetSummonerGUID() == receiver.GetGUID() && summon.GetCreatureIdVisibleToSummoner().HasValue)
+                        entryId = summon.GetCreatureIdVisibleToSummoner().Value;
+            }
+
+            return entryId;
+        }
+
         uint GetViewerDependentDynamicFlags(ObjectFieldData objectData, WorldObject obj, Player receiver)
         {
             uint unitDynFlags = objectData.DynamicFlags;
@@ -2217,6 +2232,18 @@ namespace Game.Entities
             if (unit.IsCreature())
             {
                 CreatureTemplate cinfo = unit.ToCreature().GetCreatureTemplate();
+                TempSummon summon = unit.ToTempSummon();
+                if (summon != null)
+                {
+                    if (summon.GetSummonerGUID() == receiver.GetGUID())
+                    {
+                        if (summon.GetCreatureIdVisibleToSummoner().HasValue)
+                            cinfo = Global.ObjectMgr.GetCreatureTemplate(summon.GetCreatureIdVisibleToSummoner().Value);
+
+                        if (summon.GetDisplayIdVisibleToSummoner().HasValue)
+                            displayId = summon.GetDisplayIdVisibleToSummoner().Value;
+                    }
+                }
 
                 // this also applies for transform auras
                 SpellInfo transform = Global.SpellMgr.GetSpellInfo(unit.GetTransformSpell(), unit.GetMap().GetDifficultyID());

Source/Game/Entities/TemporarySummon.cs

@@ -193,6 +193,20 @@ namespace Game.Entities
                 if (owner.IsTypeId(TypeId.Player))
                     m_ControlledByPlayer = true;
 
+            if (owner != null && owner.IsPlayer())
+            {
+                CreatureSummonedData summonedData = Global.ObjectMgr.GetCreatureSummonedData(GetEntry());
+                if (summonedData != null)
+                {
+                    m_creatureIdVisibleToSummoner = summonedData.CreatureIDVisibleToSummoner;
+                    if (summonedData.CreatureIDVisibleToSummoner.HasValue)
+                    {
+                        CreatureTemplate creatureTemplateVisibleToSummoner = Global.ObjectMgr.GetCreatureTemplate(summonedData.CreatureIDVisibleToSummoner.Value);
+                        m_displayIdVisibleToSummoner = ObjectManager.ChooseDisplayId(creatureTemplateVisibleToSummoner, null).CreatureDisplayID;
+                    }
+                }
+            }
+
             if (m_Properties == null)
                 return;
 
@@ -367,6 +381,9 @@ namespace Game.Entities
 
         public uint GetTimer() { return m_timer; }
 
+        public uint? GetCreatureIdVisibleToSummoner() { return m_creatureIdVisibleToSummoner; }
+        public uint? GetDisplayIdVisibleToSummoner() { return m_displayIdVisibleToSummoner; }
+        
         public bool CanFollowOwner() { return m_canFollowOwner; }
         public void SetCanFollowOwner(bool can) { m_canFollowOwner = can; }
 
@@ -375,6 +392,8 @@ namespace Game.Entities
         uint m_timer;
         uint m_lifetime;
         ObjectGuid m_summonerGUID;
+        uint? m_creatureIdVisibleToSummoner;
+        uint? m_displayIdVisibleToSummoner;
         bool m_canFollowOwner;
     }