Core/Transmog: Implemented TransmogIllusionFlags::PlayerConditionGrantsOnLogin and fixed transmog illusion validation when transmogging items

Port From (https://github.com/TrinityCore/TrinityCore/commit/f820ff178decf7d844b7c398b79be7269feeb53e)

Source/Game/Entities/Player/CollectionManager.cs

@@ -909,25 +909,30 @@ namespace Game.Entities
             }
         }
 
-        public void AddTransmogIllusion(ushort illusionId)
+        public void AddTransmogIllusion(uint transmogIllusionId)
         {
             Player owner = _owner.GetPlayer();
-            if (_transmogIllusions.Count <= illusionId)
+            if (_transmogIllusions.Count <= transmogIllusionId)
             {
                 uint numBlocks = (uint)(_transmogIllusions.Count << 2);
-                _transmogIllusions.Length = illusionId + 1;
+                _transmogIllusions.Length = (int)transmogIllusionId + 1;
                 numBlocks = (uint)(_transmogIllusions.Count << 2) - numBlocks;
                 while (numBlocks-- != 0)
                     owner.AddIllusionBlock(0);
             }
 
-            _transmogIllusions.Set(illusionId, true);
-            int blockIndex = illusionId / 32;
-            int bitIndex = illusionId % 32;
+            _transmogIllusions.Set((int)transmogIllusionId, true);
+            uint blockIndex = transmogIllusionId / 32;
+            uint bitIndex = transmogIllusionId % 32;
 
-            owner.AddIllusionFlag(blockIndex, (uint)(1 << bitIndex));
+            owner.AddIllusionFlag((int)blockIndex, (uint)(1 << (int)bitIndex));
         }
 
+        public bool HasTransmogIllusion(uint transmogIllusionId)
+        {
+            return transmogIllusionId < _transmogIllusions.Count && _transmogIllusions.Get((int)transmogIllusionId);
+        }
+        
         public bool HasToy(uint itemId) { return _toys.ContainsKey(itemId); }
         public Dictionary<uint, ToyFlags> GetAccountToys() { return _toys; }
         public Dictionary<uint, HeirloomData> GetAccountHeirlooms() { return _heirlooms; }

Source/Game/Entities/Player/Player.DB.cs

@@ -2785,7 +2785,7 @@ namespace Game.Entities
                 mapId = homebind.GetMapId();
                 instance_id = 0;
                 Relocate(homebind);
-            });                
+            });
 
             _LoadGroup(holder.GetResult(PlayerLoginQueryLoad.Group));
 
@@ -3354,6 +3354,23 @@ namespace Game.Entities
             m_questObjectiveCriteriaMgr.CheckAllQuestObjectiveCriteria(this);
 
             PushQuests();
+
+            foreach (var transmogIllusion in CliDB.TransmogIllusionStorage.Values)
+            {
+                if (!transmogIllusion.GetFlags().HasFlag(TransmogIllusionFlags.PlayerConditionGrantsOnLogin))
+                    continue;
+
+                if (GetSession().GetCollectionMgr().HasTransmogIllusion(transmogIllusion.Id))
+                    continue;
+
+                var playerCondition = CliDB.PlayerConditionStorage.LookupByKey(transmogIllusion.UnlockConditionID);
+                if (playerCondition != null)
+                    if (!ConditionManager.IsPlayerMeetingCondition(this, playerCondition))
+                        continue;
+
+                GetSession().GetCollectionMgr().AddTransmogIllusion(transmogIllusion.Id);
+            }
+
             return true;
         }