server/serializers/rest/troupes/room-membership-strategy.js

   1 'use strict';
   2
   3 var roomMembershipService = require('gitter-web-rooms/lib/room-membership-service');
   4 var collections = require('gitter-web-utils/lib/collections');
   5
   6 function RoomMembershipStrategy(options) {
   7   this.userId = options.userId || options.currentUserId;
   8   this.nonMemberTroupeIds =
   9     options.nonMemberTroupeIds && collections.hashArray(options.nonMemberTroupeIds);
  10   this.predefinedValue = options.isRoomMember !== undefined;
  11   this.isRoomMember = options.isRoomMember;
  12   this.memberships = null;
  13 }
  14
  15 RoomMembershipStrategy.prototype = {
  16   preload: async function(troupeIds) {
  17     // Shortcut logic
  18     if (this.nonMemberTroupeIds || this.predefinedValue) {
  19       return;
  20     }
  21
  22     const memberTroupeIds = await roomMembershipService.findUserMembershipInRooms(
  23       this.userId,
  24       troupeIds.toArray()
  25     );
  26
  27     this.memberships = collections.hashArray(memberTroupeIds);
  28   },
  29
  30   map: function(id) {
  31     if (this.predefinedValue) {
  32       return this.isRoomMember;
  33     }
  34
  35     if (this.nonMemberTroupeIds) {
  36       return !this.nonMemberTroupeIds[id]; // Negate
  37     }
  38
  39     return !!this.memberships[id];
  40   },
  41
  42   name: 'AllUnreadItemCountStrategy'
  43 };
  44
  45 module.exports = RoomMembershipStrategy;