Core/BattlegroundMap: Load all cells when created & mark all creatures as active

Port From (https://github.com/TrinityCore/TrinityCore/commit/e72bde5236d41a7f66abb25ce9e118eeb1c5aa92)

Source/Framework/Constants/SharedConst.cs

@@ -1517,6 +1517,7 @@ namespace Framework.Constants
         BasemapLoadGrids,
         BattlegroundCastDeserter,
         BattlegroundInvitationType,
+        BattlegroundMapLoadGrids,
         BattlegroundPremadeGroupWaitForMatch,
         BattlegroundPrematureFinishTimer,
         BattlegroundQueueAnnouncerEnable,

Source/Game/Maps/Map.cs

@@ -423,6 +423,9 @@ namespace Game.Maps
                 return false; //Should delete object
             }
 
+            if (IsAlwaysActive())
+                obj.SetActive(true);
+
             var cell = new Cell(cellCoord);
             if (obj.IsActiveObject())
                 EnsureGridLoadedForActiveObject(cell, obj);
@@ -3345,6 +3348,15 @@ namespace Game.Maps
             return i_mapRecord != null && i_mapRecord.IsGarrison();
         }
 
+        /// <summary>
+        /// Currently, this means that every entity added to this map will be marked as active
+        /// </summary>
+        /// <returns></returns>
+        bool IsAlwaysActive()
+        {
+            return IsBattlegroundOrArena();
+        }
+
         private bool GetEntrancePos(out uint mapid, out float x, out float y)
         {
             mapid = 0;

Source/Game/Maps/MapManager.cs

@@ -97,6 +97,10 @@ namespace Game.Entities
             Cypher.Assert(map.IsBattlegroundOrArena());
             map.SetBG(bg);
             bg.SetBgMap(map);
+
+            if (WorldConfig.GetBoolValue(WorldCfg.BattlegroundMapLoadGrids))
+                map.LoadAllCells();
+
             return map;
         }
 

Source/Game/Server/WorldConfig.cs

@@ -227,6 +227,7 @@ namespace Game
                 Values[WorldCfg.InstancemapLoadGrids] = false;
             }
 
+            Values[WorldCfg.BattlegroundMapLoadGrids] = GetDefaultValue("BattlegroundMapLoadAllGrids", true);
             Values[WorldCfg.IntervalSave] = GetDefaultValue("PlayerSaveInterval", 15 * Time.Minute * Time.InMilliseconds);
             Values[WorldCfg.IntervalDisconnectTolerance] = GetDefaultValue("DisconnectToleranceInterval", 0);
             Values[WorldCfg.StatsSaveOnlyOnLogout] = GetDefaultValue("PlayerSave.Stats.SaveOnlyOnLogout", true);

Source/WorldServer/WorldServer.conf.dist

@@ -324,6 +324,15 @@ BaseMapLoadAllGrids = 0
 
 InstanceMapLoadAllGrids = 0
 
+#
+#    BattlegroundMapLoadAllGrids
+#        Description: Load all grids for battleground maps upon load.
+#                     Upon loading an battleground map, all creatures/objects in the map will be pre-loaded
+#        Default:     1 - (Preload all grids in the instance upon load)
+#                     0 - (Don't preload all base maps, dynamically load as used)
+
+BattlegroundMapLoadAllGrids = 1
+
 #
 #    SocketTimeOutTime
 #        Description: Time (in milliseconds) after which a connection being idle on the character