Core/RBAC: Add permission that prevents getting a battleground deserter debuff.

sql/updates/auth/master/2024_01_06_00_auth.sql

@@ -0,0 +1,7 @@
+--
+DELETE FROM `rbac_permissions` WHERE `id` = 52;
+INSERT INTO `rbac_permissions` (`id`, `name`) VALUES (52, "No battleground deserter debuff");
+
+DELETE FROM `rbac_linked_permissions` WHERE `linkedId` = 52;
+INSERT INTO `rbac_linked_permissions` (`id`, `linkedId`) VALUES
+(193, 52);

src/server/game/Accounts/RBAC.h

@@ -102,6 +102,7 @@ enum RBACPermissions
     RBAC_PERM_EMAIL_CONFIRM_FOR_PASS_CHANGE                  = 49,
     RBAC_PERM_MAY_CHECK_OWN_EMAIL                            = 50,
     RBAC_PERM_ALLOW_TWO_SIDE_TRADE                           = 51,
+    RBAC_PERM_NO_BATTLEGROUND_DESERTER_DEBUFF                = 52,
 
     // Free space for core permissions (till 149)
     // Roles (Permissions with delegated permissions) use 199 and descending

src/server/game/Entities/Player/Player.cpp

@@ -25306,14 +25306,18 @@ Team Player::GetBGTeam() const
     return m_bgData.bgTeam ? m_bgData.bgTeam : GetTeam();
 }
 
-void Player::LeaveBattleground(bool teleportToEntryPoint)
+void Player::LeaveBattleground(bool teleportToEntryPoint /*= true*/)
 {
-    if (Battleground* bg = GetBattleground())
-    {
-        bg->RemovePlayerAtLeave(GetGUID(), teleportToEntryPoint, true);
+    Battleground* bg = GetBattleground();
+    if (!bg)
+        return;
 
-        // call after remove to be sure that player resurrected for correct cast
-        if (bg->isBattleground() && !IsGameMaster() && sWorld->getBoolConfig(CONFIG_BATTLEGROUND_CAST_DESERTER))
+    bg->RemovePlayerAtLeave(GetGUID(), teleportToEntryPoint, true);
+
+    // call after remove to be sure that player resurrected for correct cast
+    if (bg->isBattleground() && sWorld->getBoolConfig(CONFIG_BATTLEGROUND_CAST_DESERTER))
+    {
+        if (!GetSession()->HasPermission(rbac::RBAC_PERM_NO_BATTLEGROUND_DESERTER_DEBUFF))
         {
             if (bg->GetStatus() == STATUS_IN_PROGRESS || bg->GetStatus() == STATUS_WAIT_JOIN)
             {