get_spotify_playlist.rb

gistfile1.rb

# Provide desired spotify playlist url you want to save as first argument.
# For obtianing links for the tracks you would need vk token.
# VK token should have offline and audio permissions.
# First argument should be a link to spotify playlist with the open.spotify.com based domen
# Second argument is optional for base directory, in which all files would go
# For details refer to VK documentation http://vk.com/dev
require 'nokogiri'
require 'open-uri'
require 'vkontakte_api'
require 'ruby-progressbar'
require 'fileutils'

DIRECTORY = "#{ENV['HOME']}/Music/Spotify Playlists/"

public

def get_song_info(song)
  url = "http://open.spotify.com" + "/track/" + song["data-id"]
  page = Nokogiri::HTML(open(url))
  "#{page.css('.player-header h2 a').text} #{page.css('.player-header h1').text}" #artist title
end

def get_songs(url)
  songs = []
  page = Nokogiri::HTML(open(url))
  songs_html = page.css('li.single-track')
  progressbar = ProgressBar.create(:title => "Getting information about songs", :starting_at => 0, :total => songs_html.size)
  songs_html.each do |song|
    songs << get_song_info(song)
    progressbar.increment
  end

  songs
end

def get_songs_url(songs)
  urls = []
  vk = VkontakteApi::Client.new(ENV["VK_TOKEN"])
  songs.each do |song|
    begin
      results = vk.audio.search(q: song, sort: "2")
    rescue VkontakteApi::Error => e
      p "#{e.message}"
      p "Going too sleep for 5 seconds."
      sleep(5)
      retry
    end
    if results[1]
      song_added = false
      results[1..results.size].each do |result|
        size = (open(result.url.split(/\?extra/).first).meta['content-length']).to_i / 1024
        bitrate = (size.to_i * 8) / result.duration.to_i
        p "Found version of #{song} with #{bitrate} kbps"
        if bitrate.to_i > 300
          urls << {url: result.url.split(/\?extra/).first, name: song}
          break
        end
      end
    end
  end

  urls
end

def save_songs_to_the_directory(full_path, urls)
  progressbar = ProgressBar.create(:title => "Downloading songs", :starting_at => 0, :total => urls.size)
  urls.each do |url|
    File.open("#{full_path}#{url[:name]}.mp3", "wb") do |saved_file|
      open("#{url[:url]}", "rb") do |read_file|
        saved_file.write(read_file.read)
        progressbar.increment
      end
    end
  end
end

raise "You need to set VK_TOKEN" unless ENV["VK_TOKEN"]
urls = get_songs_url(get_songs(ARGV[0]))
base_directory = ARGV[1] || DIRECTORY
subdirectory   = Nokogiri::HTML(open(ARGV[0])).css('.player-header h1').text
full_path = "#{base_directory}#{subdirectory}/"
FileUtils::mkdir_p full_path
save_songs_to_the_directory(full_path, urls)