lastfm-very-simple-recommender.rb

# This script just get the latest tracks of your friends on Last.fm and recommends those more popular.
# It's all based on a conversation between @mort, @rochgs, @littlemove and me (mainly by @mort)

# INSTRUCTIONS 

# 1. Install lastfm gem: https://github.com/youpy/ruby-lastfm/
#      gem install lastfm
# 2. Get a Last.fm API Key  on http://www.lastfm.es/api

require 'lastfm'

api_key = "GET YOURS"
api_secret = "GET YOURS"

lastfm = Lastfm.new(api_key, api_secret)

friends = lastfm.user.get_friends("A USERNAME")

songs = {}
friends.each do |friend|

  puts "getting songs for #{friend["name"]}"
    lastfm.user.get_recent_tracks(friend["name"], 100).each do |song|

      songs["#{song["name"]} - #{song["artist"]["content"]}"] ||= 0
      songs["#{song["name"]} - #{song["artist"]["content"]}"] += 1

    end

end

ordered_songs = {}
songs.each  do |name, times| 
  ordered_songs[times] ||= []
  ordered_songs[times] << name
end

ordered_songs.keys.sort.each  do |times| 
  puts "\n#{times} ------------------------------------- "
  ordered_songs[times].each do |song| puts "\t\t#{song}" end     
end