How to use

reduce

function

in

Collection

_(files)
 // Filter if file exists
 .filter(fs.existsSync)
 // Start collecting
 .reduce((a, file) => exports.merge(a, yaml.safeLoad(fs.readFileSync(file))), {})

function registerInRedis(worker, redisConnection, stats) {
  return new Promise(function (resolve, reject) {
    var keyName = "chatUp:chatServer:" + worker._conf.uuid;
    redisConnection.multi()
      .hmset(keyName, {
      host: worker._conf.host,
      connections: _(worker._workers).map('stats').map('connections').sum(),
      pubStats: JSON.stringify(_(worker._workers).map('stats').map('channels').flatten().compact().reduce(function (stats, channel) {
        stats[channel.name] = _.union(stats[channel.name] || [], channel.publishers);
        return stats;
      }, {})),
      subStats: JSON.stringify(stats)
    })
      .pexpire(keyName, worker._conf.expireDelay)
      .exec(function (err, results) {
      if (err) {
        logger.captureError(logger.error('Redis register', { err: err }));
        return reject(err);
      }
      return resolve();
    });
  });
}

function registerInRedis(worker: ChatWorker, redisConnection: redis.RedisClient, stats:any):Promise<void> {
 return new Promise<void>(function(resolve, reject) {
  var keyName = "chatUp:chatServer:" + worker._conf.uuid;
  redisConnection.multi()
   .hmset(keyName, {
    host: worker._conf.host,
    connections: _(worker._workers).map('stats').map('connections').sum(),
    pubStats: JSON.stringify(_(worker._workers).map('stats').map('channels').flatten().compact().reduce((stats, channel:any) => {
     stats[channel.name] = _.union(stats[channel.name] || [], channel.publishers);
     return stats;
    }, {})),
    subStats: JSON.stringify(stats)
   })
   .pexpire(keyName, worker._conf.expireDelay)
   .exec((err, results) => {
    if (err) {
     logger.captureError(logger.error('Redis register', {err}));
     return reject(err);
    }
    return resolve();
   });
 });
}