[monorepo] prepare per-project queues (#35386)

GitOrigin-RevId: ab020603ec04c705d08be466563adac0ce30bc04

services/web/app/src/Features/Editor/EditorHttpController.mjs

@@ -7,6 +7,7 @@ import Metrics from '@overleaf/metrics'
 import CollaboratorsInviteGetter from '../Collaborators/CollaboratorsInviteGetter.mjs'
 import PrivilegeLevels from '../Authorization/PrivilegeLevels.mjs'
 import SessionManager from '../Authentication/SessionManager.mjs'
+import SplitTestHandler from '../SplitTests/SplitTestHandler.mjs'
 import Errors from '../Errors/Errors.js'
 import { expressify } from '@overleaf/promise-utils'
 import Settings from '@overleaf/settings'
@@ -67,12 +68,22 @@ async function joinProject(req, res, next) {
     )
   }
 
+  let usePerProjectPendingUpdates = false
+  if (userId) {
+    usePerProjectPendingUpdates =
+      await SplitTestHandler.promises.featureFlagEnabledForUser(
+        userId,
+        'per-project-pending-updates'
+      )
+  }
+
   res.json({
     project,
     privilegeLevel,
     isRestrictedUser,
     isTokenMember,
     isInvitedMember,
+    usePerProjectPendingUpdates,
   })
 }