lastfm

lastfm-node

Read and write to users recent plays on Last.fm.

Installation

npm install lastfm

Usage

var LastFmNode = require('lastfm').LastFmNode;

var lastfm = new LastFmNode({
  api_key: 'apikey',    // sign-up for a key at http://www.last.fm/api
  secret: 'secret'
});

Documentation

RecentTracksStream

lastfm.stream(username);

Returns: a RecentTracksStream instance

Methods:

• start()

    Start streaming recent track info.
  

• stop()

    Stop streaming recent track info.
  

• on(event, listener)

    Adds a listener for the specified event.
  

• removeListener(event, listener)

    Removes the listener for the specified event.
  

Options:

• autostart

    Start streaming automatically. Defaults to false.
  

• lastPlayed, nowPlaying, scrobbled, stoppedPlaying, error

    Event listeners.
  

Events:

• lastPlayed(track)

    The user's last scrobbled track.
  

• nowPlaying(track)

    Track the user is currently listening to.
  

• scrobbled(track)

    Now playing track has been scrobbled.
  

• stoppedPlaying(track)

    User stopped listening to current track.
  

• error(error)

    Ruh-roh.
  

LastFmSession

lastfm.session([user], [key]);

Returns: a LastFmSession instance.

If no key is supplied then the authorise() method must be used before the session can be used to make authenticated calls. See the last.fm API documentation for more info.

Public properties:

• user

    The username of the Last.fm user associated with the session.
  

• key

    The session key. Either passed in or generated using authorise().
  

Methods:

• authorise(token, [options])

Authorises user with Last.fm api. See last.fm documentation. Options: - authorised : function(session) Listener for authorised event. See below.

   - *error* : `function(error)`
    Listener for `error` event. See below.

• on(event, handler)

    Adds a listener for the specified event.
  

• removeListener(event, handler)

    Removes the listener for the specified event.
  

• isAuthorised()

    Returns true if the session has been authorised or a key was specified in the constructor.
  

Events:

• authorised(session)

    Authorisation of session was successful.
    Note: Only emitted after a call to authorise(). Keys supplied in the constructor are assumed to be valid.
  

• error(track, error)

    Ruh-roh.
  

LastFmUpdate

lastfm.update(method, session, options);

Returns a LastFmUpdate instance.

Valid methods are 'nowplaying' and 'scrobble'.

An authorised LastFmSession instance is required to make a successful update.

Options:

• track

    Track for nowplaying and scrobble requests. Uses same format as returned by `RecentTracksStream` events.
  

• timestamp

    Required for scrobble requests. Timestamp is in unix time (seconds since 01-01-1970 and is in UTC time).
  

• success

    Listener for `success` event.
  

• error

   Listener for `error` event.
  

Events:

• success(track)

   Update request was successful. 
  

• error(track, error)

    Ruh-roh.
  

LastFmInfo

lastfm.info(itemtype, [options]);

Returns: a LastFmInfo instance.

Gets extended info about specified item.

Public properties:

• itemtype

    Any Last.fm item with a getInfo method. eg user, track, artist, etc.
  

Options:

• success

    Listener for `success` event.
  

• error

   Listener for `error` event.
  

• various

   Params as specified in Last.fm API, eg user: "username"
  

Special cases:

When requesting track info the track param can be either the track name or a track object as returned by RecentTracksStream.

Example

var LastFmNode = require('lastfm').LastFmNode;

var lastfm = new LastFmNode({
  api_key: 'abc',
  secret: 'secret'
});

var trackStream = lastfm.stream('username');

trackStream.on('lastPlayed', function(track) {
  console.log('Last played: ' + track.name);
});

trackStream.on('nowPlaying', function(track) {
  console.log('Now playing: ' + track.name);
});

trackStream.on('scrobbled', function(track) {
  console.log('Scrobbled: ' + track.name);
});

trackStream.on('stoppedPlaying', function(track) {
  console.log('Stopped playing: ' + track.name);
});

trackStream.on('error', function(error) {
  console.log('Error: '  + error.message);
});

trackStream.start();

var session = lastfm.session();
session.authorise(token, {
   authorised: function(session) {
      lastfm.update('nowplaying', session, { track: track } );
      lastfm.update('scrobble', session, { track: track, timestamp: 12345678 });
   }
});

Influences

Heavily drawn from technoweenie's twitter-node
http://github.com/technoweenie/twitter-node

Changelog

0.4.4

• Handles response errors (timeouts, etc) when communicating with Last.fm
• Fixed bug where unexpected data in LastFmInfo would crash application.