Congress API

index.js

var request = require('request');
var moment = require('moment');
var parseString = require('xml2js').parseString;

var CONGRESS_XML = 'http://www.senate.gov/general/contact_information/senators_cfm.xml';
var CACHE_KEY = 'contacts';

module['exports'] = function helloWorld(hook) {

  store = hook.datastore;

  store.get(CACHE_KEY, function(err, cachedContacts) {

    var duration;

    if (cachedContacts) {
      var cachedOn = moment(cachedContacts.cachedOn);
      duration = moment.duration(cachedOn.diff(moment()));
    }

    if (duration && duration.asHours() < 1) {
      hook.res.json(cachedContacts);
    } else {
      request(CONGRESS_XML, function (error, response, body) {
        if (!error && response.statusCode == 200) {
          parseString(body, {explicitArray: false}, function (err, senateContacts) {
            senateContacts.cachedOn = new Date();
            store.set(CACHE_KEY, senateContacts, function (err) {
              hook.res.json(senateContacts);
            });
          });
        }
      });
    }
  });
};