node_helper.js

/* Magic Mirror
 * Module: MMM-Traffic
 *
 * By Sam Lewis https://github.com/SamLewis0602
 * MIT Licensed.
 */

var NodeHelper = require('node_helper');
var request = require('request');

module.exports = NodeHelper.create({
  start: function () {
    console.log('MMM-Traffic helper started ...');
  },

  getCommute: function(api_url) {
    var self = this;
    request({url: api_url, method: 'GET'}, function(error, response, body) {
      if (!error && response.statusCode == 200) {
        var trafficComparison = 0;
        if (JSON.parse(body).routes[0].legs[0].duration_in_traffic) {
          var commute = JSON.parse(body).routes[0].legs[0].duration_in_traffic.text;
          var noTrafficValue = JSON.parse(body).routes[0].legs[0].duration.value;
          var withTrafficValue = JSON.parse(body).routes[0].legs[0].duration_in_traffic.value;
          trafficComparison = parseInt(withTrafficValue)/parseInt(noTrafficValue);
        } else {
          var commute = JSON.parse(body).routes[0].legs[0].duration.text;
        }
        var summary = JSON.parse(body).routes[0].summary;

        self.sendSocketNotification('TRAFFIC_COMMUTE', {'commute':commute, 'url':api_url, 'trafficComparison': trafficComparison, 'summary':summary});
      }
    });
  },

  //Subclass socketNotificationReceived received.
  socketNotificationReceived: function(notification, payload) {
    //console.log(notification);
    if (notification === 'TRAFFIC_URL') {
      this.getCommute(payload);
    }
  }

});