node-google-timezone

node-google-timezone

A Node.js wrapper to Google Timezone API

The Time Zone API provides time offset data for locations on the surface of the earth. Requesting the time zone information for a specific Latitude/Longitude pair will return the name of that time zone, the time offset from UTC, and the Daylight Savings offset.

Please refer to The Google Time Zone API documentation for further details on request parameters and response format.

##Installation

npm install node-google-timezone

##Usage

var timezone = require('node-google-timezone');

var timestamp = 1402629305; 
// time as seconds since midnight, January 1, 1970 UTC

console.log(new Date(timestamp * 1000));
// => Fri Jun 13 2014 00:15:05 GMT-0300 (BRT)

// somewhere in New York
var lat = 40.7421,
    lng = -73.9914;

//timezone.key('YOUR API KEY HERE'); // optional

//timezone.language('es'); // optional: default 'en'

timezone.data(lat, lng, timestamp, function (err, tz) {

  console.log(tz.raw_response);
  //=> { dstOffset: 3600,
  //     rawOffset: -18000,
  //     status: 'OK',
  //     timeZoneId: 'America/New_York',
  //     timeZoneName: 'Eastern Daylight Time' }

  console.log(tz.local_timestamp);
  // => 1402614905

  var d = new Date(tz.local_timestamp * 1000);

  console.log(d.toDateString() + ' - ' + d.getHours() + ':' + d.getMinutes());
  // => Thu Jun 12 2014 - 20:15

});

##API Key

Optional for users of the Free API (2,500 requests per 24 hour period).

Please read the API Key documentation first.

If using a key:

• There are 2 options to define the key:

• Create an environment variable GOOGLE_API_KEY, or...
• Programatically:

timezone.key('YOUR-API-KEY');

• If using client and signature:

• Create environment variables GOOGLE_CLIENT_KEY and GOOGLE_SIGNATURE_KEY, or...
• Programmatically:

timezone.client('YOUR-CLIENT-KEY');
timezone.signature('YOUR-SIGNATURE');

##Parameters

• lat: location latitude
• lng: location longitude
• timestamp: time as seconds since midnight, January 1, 1970 UTC. Times before 1970 can be expressed as negative values.
• callback(err, timezone): callback function with an Error object and a Timezone object as parameters.

Timezone Properties

• timezone.raw_response: the response as returned by Google API. See Time Zone Responses for more details.

{ dstOffset: 3600,
  rawOffset: -18000,
  status: 'OK',
  timeZoneId: 'America/New_York',
  timeZoneName: 'Eastern Daylight Time' }

• timezone.local_timestamp: the local time at the specified location considering Daylight Savings Time.
• timezone.options:

{ location: '40.7421,-73.9914',
  timestamp: 1402629305,
  language: 'en' }

Options

• API Key (optional): defaults to environment variable GOOGLE_API_KEY

timezone.key('YOUR-API-KEY');

• Client ID (optional): defaults to environment variable GOOGLE_CLIENT_KEY

timezone.client('YOUR-CLIENT-KEY');

• Signature (optional): defaults to environment variable GOOGLE_SIGNATURE_KEY

timezone.signature('YOUR-SIGNATURE');

• Language (optional): defaults to en

timezone.language('pt');