Core/Battleground: Check battlegrounds disabled in db2 files

Port From (https://github.com/TrinityCore/TrinityCore/commit/5d57415951c4b6f7b86c97922c94b571a178f35a)

Source/Framework/Constants/CliDBConst.cs

@@ -986,6 +986,17 @@ namespace Framework.Constants
         Max
     }
 
+    public enum BattlemasterListFlags : sbyte
+    {
+        Disabled = 0x01,
+        SkipRoleCheck = 0x02,
+        Unk4 = 0x04,
+        CanInitWarGame = 0x08,
+        CanSpecificQueue = 0x10,
+        Brawl = 0x20,
+        Factional = 0x40
+    }
+
     public enum ChrSpecializationFlag
     {
         Caster = 0x01,

Source/Game/DataStorage/Structs/B_Records.cs

@@ -14,6 +14,7 @@
  * You should have received a copy of the GNU General Public License
  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  */
+using Framework.Constants;
 
 namespace Game.DataStorage
 {
@@ -97,7 +98,7 @@ namespace Game.DataStorage
         public sbyte GroupsAllowed;
         public sbyte MaxGroupSize;
         public ushort HolidayWorldState;
-        public sbyte Flags;
+        public BattlemasterListFlags Flags;
         public int IconFileDataID;
         public short RequiredPlayerConditionID;
         public short[] MapId = new short[16];

Source/Game/Handlers/BattleGroundHandler.cs

@@ -64,19 +64,19 @@ namespace Game
                 return;
             }
 
-            uint bgTypeId_ = (uint)(battlemasterJoin.QueueIDs[0] & 0xFFFF);
-            if (!CliDB.BattlemasterListStorage.ContainsKey(bgTypeId_))
+            BattlegroundTypeId bgTypeId = (BattlegroundTypeId)(battlemasterJoin.QueueIDs[0] & 0xFFFF);
+            BattlemasterListRecord battlemasterListEntry = CliDB.BattlemasterListStorage.LookupByKey(bgTypeId);
+            if (battlemasterListEntry == null)
             {
-                Log.outError(LogFilter.Network, "Battleground: invalid bgtype ({0}) received. possible cheater? player guid {1}", bgTypeId_, GetPlayer().GetGUID().ToString());
+                Log.outError(LogFilter.Network, "Battleground: invalid bgtype ({0}) received. possible cheater? player guid {1}", bgTypeId, GetPlayer().GetGUID().ToString());
                 return;
             }
 
-            if (Global.DisableMgr.IsDisabledFor(DisableType.Battleground, bgTypeId_, null))
+            if (Global.DisableMgr.IsDisabledFor(DisableType.Battleground, (uint)bgTypeId, null) || battlemasterListEntry.Flags.HasAnyFlag(BattlemasterListFlags.Disabled))
             {
                 GetPlayer().SendSysMessage(CypherStrings.BgDisabled);
                 return;
             }
-            BattlegroundTypeId bgTypeId = (BattlegroundTypeId)bgTypeId_;
 
             // can do this, since it's Battleground, not arena
             BattlegroundQueueTypeId bgQueueTypeId = Global.BattlegroundMgr.BGQueueTypeId(bgTypeId, 0);