fix(Core/DK): Don't allow starter dk to queue bg (#2584)

src/server/game/Groups/Group.cpp

@@ -1875,6 +1875,10 @@ GroupJoinBattlegroundResult Group::CanJoinBattlegroundQueue(Battleground const*
         // don't let join to bg queue random if someone from the group is already in bg queue
         if (bgTemplate->GetBgTypeID() == BATTLEGROUND_RB && member->InBattlegroundQueue())
             return ERR_IN_NON_RANDOM_BG;
+
+        // don't let Death Knights join BG queues when they are not allowed to be teleported yet
+        if (member->getClass() == CLASS_DEATH_KNIGHT && member->GetMapId() == 609 && !member->IsGameMaster() && !member->HasSpell(50977))
+            return ERR_GROUP_JOIN_BATTLEGROUND_FAIL;
     }
 
     // for arenas: check party size is proper
@@ -2335,4 +2339,3 @@ void Group::ToggleGroupMemberFlag(member_witerator slot, uint8 flag, bool apply)
     else
         slot->flags &= ~flag;
 }
-

src/server/game/Handlers/BattleGroundHandler.cpp

@@ -158,6 +158,9 @@ void WorldSession::HandleBattlemasterJoinOpcode(WorldPacket & recvData)
                  _player->InBattlegroundQueueForBattlegroundQueueType(BATTLEGROUND_QUEUE_3v3) ||
                  _player->InBattlegroundQueueForBattlegroundQueueType(BATTLEGROUND_QUEUE_5v5)) // can't be already queued for arenas
             err = ERR_BATTLEGROUND_QUEUED_FOR_RATED;
+        // don't let Death Knights join BG queues when they are not allowed to be teleported yet
+        else if (_player->getClass() == CLASS_DEATH_KNIGHT && _player->GetMapId() == 609 && !_player->IsGameMaster() && !_player->HasSpell(50977))
+            err = ERR_BATTLEGROUND_NONE;
 
         if (err <= 0)
         {