Rockstar 
Rockstar is a wrapper for the last.fm audioscrobbler web services (http://www.last.fm/api/). This gem is based on the scrobbler gem by John Nunemaker and was updated to use the 2.0 version of the last.fm api
Below is just a sampling of how easy this lib is to use.
Please initialize your api key and secret before using the api:
Rockstar.lastfm = YAML.load_file('lastfm.yml')
Here is an example lastfm.yml:
api_key: "API"
api_secret: "SECRET"
If you want to use the api in an rails app, you could add an initializer in config/initializers/lastm.rb and load a config/lastfm.yml file.
rails_root = ENV['RAILS_ROOT'] || File.dirname(__FILE__) + '/../..'
Rockstar.lastfm = YAML.load_file(rails_root + '/config/lastfm.yml')
Alternatively you can provide a hash with the api key and secret:
Rockstar.lastfm = {:api_key => "API", :api_secret => "SECRET"}
Users
user = Rockstar::User.new('jnunemaker')
puts "#{user.username}'s Recent Tracks"
puts "=" * (user.username.length + 16)
user.recent_tracks.each { |t| puts t.name }
puts
puts
puts "#{user.username}'s Top Tracks"
puts "=" * (user.username.length + 13)
user.top_tracks.each { |t| puts "(#{t.playcount}) #{t.name}" }
Albums
album = Rockstar::Album.new('Carrie Underwood', 'Some Hearts', :include_info => true)
puts "Album: #{album.name}"
puts "Artist: #{album.artist}"
puts "URL: #{album.url}"
puts "Release Date: #{album.release_date.strftime('%m/%d/%Y')}"
Artists
If you want to load all informations about an artist or any other
object, you have to add :include_info => true .
artist = Rockstar::Artist.new('Carrie Underwood', :include_info => true)
puts artist.url
puts 'Top Tracks'
puts "=" * 10
artist.top_tracks.each { |t| puts "(#{t.name}" }
puts
puts 'Similar Artists'
puts "=" * 15
artist.similar.each { |a| puts "(#{a.match}%) #{a.name}" }
Tags
tag = Rockstar::Tag.new('country')
puts 'Top Albums'
tag.top_albums.each { |a| puts "(#{a.count}) #{a.name} by #{a.artist}" }
puts
puts 'Top Tracks'
tag.top_tracks.each { |t| puts "(#{t.count}) #{t.name} by #{t.artist}" }
Geo
geo = Rockstar::Geo.new
# Get events for a lat/long
geo.events(:lat => 50.0, :long => 12.3).each{|e| p "#{e.title} at #{e.venue.name}"}
# Get events for a location
geo.events(:location => 'london').each{|e| p "#{e.title} at #{e.venue.name}"}
# To get a list of possible locations use
geo.metros("germany").each{|m| p m.name}
# Retrieve list of top tracks by country
geo.toptracks('united kingdom', 10).each{|t| p "#{t.name} by #{t.artist}"}
# Retrieve list of top artists by country
geo.topartists('united kingdom', 10).each{|a| p "artist #{a.name} with #{a.listenercount} listeners"}
Library
# Get artists and albums for user
library = Rockstar::Library.new
puts 'Artists'
library.artists(false, :user => 'jnunemaker').each { |a| puts a.name }
puts 'Albums'
library.albums(false, :user => 'jnunemaker').each { |a| puts a.name }
# Get it with Rockstar::User
user = Rockstar::User.new('jnunemaker')
puts 'Artists'
user.artists.each { |a| puts a.name }
puts 'Albums'
user.albums.each { |a| puts a.name }
Get rights to access the user data for scrobbing, now playing, events etc...
a = Rockstar::Auth.new
token = a.token
puts
puts "Please open http://www.last.fm/api/auth/?api_key=#{Rockstar.lastfm_api_key}&token=#{token}"
puts
puts "Press enter when done."
gets
session = a.session(token)
You can store the session.key somewhere and use it from now on to identify the user. More details can be found in Rockstar::Auth or examples/scrobble.rb
Tracks
track = Rockstar::Track.new('Carrie Underwood', 'Before He Cheats')
puts 'Fans'
puts "=" * 4
track.fans.each { |u| puts "(#{u.weight}) #{u.username}" }
track.love(session.key)
Scrobbling
track = Rockstar::Track.new('Carrie Underwood', 'Before He Cheats')
track.scrobble(Time.now, session.key)
Now Playing Submission
track = Rockstar::Track.new('Carrie Underwood', 'Before He Cheats')
track.updateNowPlaying(Time.now, session.key)
Note on Patches/Pull Requests
- Fork the project.
- Make your feature addition or bug fix.
- Add tests for it. This is important so I don't break it in a future version unintentionally.
- Commit, do not mess with rakefile, version, or history. (if you want to have your own version, that is fine but bump version in a commit by itself I can ignore when I pull)
- Send me a pull request. Bonus points for topic branches.
Copyright
Copyright (c) 2007-2011 John Nunemaker, Bodo "Bitboxer" Tasche, Nick "zapnap" Plante. See LICENSE for details.
Acknowledgements
Thanks to putpat.tv for sponsering the work on the rockstar gem.