server/services/live-collection-handlers/live-collection-rooms.js

   1 'use strict';
   2
   3 var Promise = require('bluebird');
   4 var appEvents = require('gitter-web-appevents');
   5 var restSerializer = require('../../serializers/rest-serializer');
   6 var roomMembershipService = require('gitter-web-rooms/lib/room-membership-service');
   7 var presenceService = require('gitter-web-presence');
   8 var _ = require('lodash');
   9
  10 function getUserDistribution(troupeId) {
  11   return roomMembershipService.findMembersForRoom(troupeId).then(function(userIds) {
  12     if (!userIds.length) return [];
  13
  14     return presenceService.categorizeUsersByOnlineStatus(userIds).then(function(online) {
  15       return userIds.filter(function(userId) {
  16         return !!online[userId];
  17       });
  18     });
  19   });
  20 }
  21
  22 function serializeRoomToUsers(userIds, operation, troupe) {
  23   if (!userIds.length) return Promise.resolve();
  24
  25   if (troupe.oneToOne) {
  26     // Because the troupe needs customized per-user....
  27     return serializeOneToOneRoomToUsers(userIds, operation, troupe);
  28   }
  29
  30   var strategy = new restSerializer.TroupeStrategy();
  31   return restSerializer.serializeObject(troupe, strategy).then(function(serializedTroupe) {
  32     appEvents.dataChange2('/rooms/' + troupe._id, operation, serializedTroupe, 'room');
  33
  34     userIds.forEach(function(userId) {
  35       appEvents.dataChange2('/user/' + userId + '/rooms', operation, serializedTroupe, 'room');
  36     });
  37   });
  38 }
  39
  40 /* Note: oneToOnes do not serialize to /rooms/:roomId since each user gets a different representation */
  41 function serializeOneToOneRoomToUsers(userIds, operation, troupe) {
  42   /* Perform the serialization for each user */
  43
  44   return Promise.map(userIds, function(userId) {
  45     var strategy = new restSerializer.TroupeStrategy({ currentUserId: userId });
  46
  47     return restSerializer.serializeObject(troupe, strategy).then(function(serializedTroupe) {
  48       appEvents.dataChange2('/user/' + userId + '/rooms', operation, serializedTroupe, 'room');
  49     });
  50   });
  51 }
  52
  53 module.exports = {
  54   create: function(troupe, initialUserIds) {
  55     /* initialUserIds is used when the room has just been created  */
  56     /* and we know who the users in the room are                   */
  57     if (initialUserIds) {
  58       return serializeRoomToUsers(initialUserIds, 'create', troupe);
  59     }
  60
  61     return getUserDistribution(troupe._id).then(function(userIds) {
  62       return serializeRoomToUsers(userIds, 'create', troupe);
  63     });
  64   },
  65
  66   update: function(troupe) {
  67     return getUserDistribution(troupe._id).then(function(userIds) {
  68       return serializeRoomToUsers(userIds, 'update', troupe);
  69     });
  70   },
  71
  72   patch: function(troupeId, patch) {
  73     var patchMessage = _.extend({}, patch, { id: troupeId });
  74     appEvents.dataChange2('/rooms/' + troupeId, 'patch', patchMessage, 'room');
  75
  76     return getUserDistribution(troupeId).then(function(userIds) {
  77       if (!userIds.length) return;
  78
  79       userIds.forEach(function(userId) {
  80         var url = '/user/' + userId + '/rooms';
  81         appEvents.dataChange2(url, 'patch', patchMessage, 'room');
  82       });
  83     });
  84   },
  85
  86   remove: function(model) {
  87     return this.removeId(model.id);
  88   },
  89
  90   removeId: function(troupeId) {
  91     appEvents.dataChange2('/rooms/' + troupeId, 'remove', { id: troupeId }, 'room');
  92
  93     return getUserDistribution(troupeId).then(function(userIds) {
  94       if (!userIds.length) return;
  95
  96       userIds.forEach(function(userId) {
  97         var url = '/user/' + userId + '/rooms';
  98         appEvents.dataChange2(url, 'remove', { id: troupeId }, 'room');
  99       });
 100     });
 101   }
 102 };