Google map coord lookup

'use strict';
var querystring = require('querystring');
var request = require('request');
var cert = require('./cert.json');
var GOOGLE_API_PATH = 'https://maps.googleapis.com/maps/api/geocode/json?';

function getCoordinates(address, fn) {
  var addressStr = stringifyAddress(address);
  var query = querystring.stringify({
    address: addressStr,
    key: cert.key
  });

  request.get(GOOGLE_API_PATH + query, function getLocation(error, data) {
    if (error) {
      fn(error);
    } else {
      try {
        var results = (JSON.parse(data.body)).results[0];
        if (results && results.geometry && results.geometry.location) {
          fn(null, results.geometry.location);
        } else {
          fn(new Error('No result found'));
        }
      } catch (e) {
        fn(e);
      }
    }
  });
}

function stringifyAddress(address) {
  var addressStr = '';
  addressStr += address.street;
  addressStr += ' ';
  addressStr += address.city;
  addressStr += ' ';
  addressStr += address.state;
  addressStr += ' ';
  addressStr += address.postal;
  addressStr += ' ';
  addressStr += address.country;
  return addressStr;
}

module.exports = getCoordinates;

/**
 * USAGE
 */

var input = {
  street: '5211 Linbar Drive #507',
  city: 'Nashville',
  state: 'TN',
  postal: '37211',
  country: 'USA'
};

getCoordinates(input, console.log);