server/services/sample-chats-service.js

   1 'use strict';
   2
   3 var chatService = require('gitter-web-chats');
   4 var restSerializer = require('../serializers/rest-serializer');
   5 var Promise = require('bluebird');
   6
   7 var cachedSamples = null;
   8 function getSamples() {
   9   if (cachedSamples) return Promise.resolve(cachedSamples);
  10
  11   return chatService
  12     .getRecentPublicChats()
  13     .then(function(chatMessage) {
  14       // Remove any duplicate users
  15       var users = {};
  16       return chatMessage.filter(function(chatMessage) {
  17         if (users[chatMessage.fromUserId]) {
  18           return false;
  19         }
  20         users[chatMessage.fromUserId] = true;
  21         return true;
  22       });
  23     })
  24     .then(function(sampleChatMessages) {
  25       var sampleChatStrategy = new restSerializer.SampleChatStrategy();
  26       var results = restSerializer.serialize(sampleChatMessages, sampleChatStrategy);
  27
  28       cachedSamples = results;
  29
  30       // Keep them cached for 30 seconds
  31       setTimeout(function() {
  32         cachedSamples = null;
  33       }, 30000);
  34
  35       return results;
  36     });
  37 }
  38
  39 module.exports = {
  40   getSamples: getSamples
  41 };