DC Metro Pro realtime data fetch

realtime.js

import _ from 'lodash';
import datastore from '../datastore';
import MetroApi from '../metroApi';
import MetroResponseTimes from '../metroResponseTimes';

module.exports = () => {
  const startTime = process.hrtime();
  return MetroApi.getRealtime().then((realtimeData) => {
    const endTime = process.hrtime(startTime)[1] / 1000000; // [0]=seconds, [1]/1000000=ms
    MetroResponseTimes.push(endTime);
    datastore.realtime = _.groupBy(realtimeData, 'LocationCode');
    return datastore.realtime;
  });
};