Spotify: Copy all songs from all your playlists into 'Your Music' (songs / albums / artists)

copy_playlist_to_my_music.rb

# Add an application at https://developer.spotify.com/my-applications
# Whitelist redirect url http://posthere.io/brians-importer
# Copy client id into url below
#   https://accounts.spotify.com/authorize?client_id=4260a40e3f514766802819f094e3be82&redirect_uri=http%3A%2F%2Fposthere.io%2Fbrians-importer&response_type=token&scope=playlist-read-private%20playlist-modify-public%20playlist-modify-private%20user-library-read%20user-library-modify
# Browse to URL
# On successful authorization, you will be redirected, from this URL copy the token param in variable below

require 'httparty'

token = '... your token here ...'
headers = { headers: {"Authorization" => "Bearer #{token}"} }


# Get playlists

res = HTTParty.get('https://api.spotify.com/v1/me/playlists', headers)
puts "#{res.code} - #{res.body}" unless res.success?

playlists = res['items'].map { |x| OpenStruct.new({name: x['name'], track_url: x['tracks']['href']}) }


playlists.each do |playlist|

  # Get playlist tracks

  puts "Getting playlist #{playlist.name}"

  res = {'next' => playlist.track_url}

  playlist_tracks = []

  while res['next']

    puts "  Getting #{res['next']}"
    res = HTTParty.get(res['next'], headers)
    puts "#{res.code} - #{res.body}" unless res.success?

    playlist_tracks.push *res['items'].map { |x| OpenStruct.new({artist: x['track']['artists'].first['name'], album:x['track']['album']['name'], name: x['track']['name'], id: x['track']['id']}) } 

  end

  # Add tracks

  playlist_tracks.each_slice(50) do |tracks|
    tracks.each { |track| puts "    Adding #{track.artist[0..14].ljust(15)} - #{track.album[0..14].ljust(15)} - #{track.name[0..24].ljust(25)}" }
    res = HTTParty.put("https://api.spotify.com/v1/me/tracks?ids=#{tracks.collect(&:id).join(',')}", headers)
    puts "#{res.code} - #{res.body}" unless res.success?
  end
  
end