Class: SoundCloud

Inherits:
Object
  • Object
show all
Includes:
Observable
Defined in:
lib/soundcloud.rb

Constant Summary collapse

LIMIT = 
100

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(client_id, params = {}) ⇒ SoundCloud

Returns a new instance of SoundCloud.



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# File 'lib/soundcloud.rb', line 16

def initialize client_id, params = {}
  params.each { |key, value| send "#{key}=", value }
  @cid = client_id
  @playlist_pos = -1
  @download_queue = []
  @dthread = Thread.new do downloader end
  @dthread.run
end

Instance Attribute Details

#logger ⇒ Object

Returns the value of attribute logger.



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# File 'lib/soundcloud.rb', line 14

def logger
  @logger
end

Instance Method Details

#download(target_dir) ⇒ Object 



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# File 'lib/soundcloud.rb', line 89

def download(target_dir)
  return @error unless @tracks
  return if @tracks.empty?
  if @tracks.is_a? Hash
    t = @tracks
  else 
    t = @tracks[@playlist_pos]
  end
  unless t["download"].nil? || t["download"].size == 0
    filename = "#{t["permalink"]}.#{t["original_format"]}"
    path = File.join(target_dir, filename)
    pair = [path, t['download']]
    @logger.debug {"download queued: #{pair}"}
    @download_queue << pair unless @download_queue.include? pair

    changed
    notify_observers :state => :download, :count => @download_queue.size
  else
    changed
    notify_observers :state => :status, :type => "Download", :value => "Not granted by content owner"
  end
end

#downloader ⇒ Object

download thread



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# File 'lib/soundcloud.rb', line 113

def downloader
  loop do
    while d = @download_queue.shift
      path = d[0]
      uri = d[1]
      size = @download_queue.size
      changed
      notify_observers :state => :download, :name => path, :count => size
      begin
        path = File.expand_path path
        File.open(path, "wb") do |file|
          cl = HTTPClient.new
          cl.redirect_uri_callback = ->(uri, res) {
            res.header['location'][0]
          }
          cl.get_content(uri) do |chunk|
            file.write(chunk)
          end
        end
      rescue Exception => e
        @logger.error {"Download error: #{e}"}
        changed
        notify_observers :state => :error, :error => e
      end
    end
    sleep 5
  end
rescue => e
  changed
  @logger.error {"Downloader thread: #{e}"}
  notify_observers :state => "error", :error => e
end

#load_playlist(search = nil, offset = 0) ⇒ Object 



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# File 'lib/soundcloud.rb', line 25

def load_playlist(search = nil, offset = 0)
  search = "" unless search && !search.empty?
  if search =~ /\s*http(s)?:\/\/(www.)?soundcloud.com.*/
    url = "https://api.soundcloud.com/resolve.json?url=%s&client_id=%s" % [CGI.escape(search), @cid]
  else
    url = "https://api.soundcloud.com/tracks.json?client_id=%s&filter=streamable&limit=%d&offset=%d&q=%s" \
      % [@cid, LIMIT, offset, CGI.escape(search)]
  end
  c = open(url) do |io|
    io.readlines
  end.join
  @tracks = JSON.parse c
  @tracks = [@tracks] if @tracks.is_a? Hash
  @tracks.map! do |t|
    t["mpg123url"] = client_url t['stream_url']
    t["download"] = client_url t['download_url']
    t["duration"] = t["duration"].nil? ? 0 : t["duration"].to_i/1000
    t["bpm"] = t["bpm"].nil? ? 0 : t["bpm"].to_i
    t[:error] = "Not streamable" if t["stream_url"].nil?
    t
  end
  changed
  notify_observers :state =>:load, :tracks => @tracks
  rescue => e
    @error = {:error => e}
end

#nextTrack ⇒ Object 



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# File 'lib/soundcloud.rb', line 59

def nextTrack
  return @error unless @tracks
  return if @tracks.empty? || @tracks.nil?
  if @tracks.is_a? Hash
    t = @tracks
  else 
    @playlist_pos += 1
    @playlist_pos -= @tracks.size if @playlist_pos >= @tracks.size
    t = @tracks[@playlist_pos]
    changed
    notify_observers :state => :next, :position => @playlist_pos
  end
  t
end

#prevTrack ⇒ Object 



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# File 'lib/soundcloud.rb', line 74

def prevTrack
  return @error unless @tracks
  return if @tracks.empty?
  if @tracks.is_a? Hash
    t = @tracks
  else 
    @playlist_pos -= 1
    @playlist_pos += @tracks.size if @playlist_pos < 0
    t = @tracks[@playlist_pos]
    changed
    notify_observers :state => :previous, :position => @playlist_pos
  end
  t
end

#shufflePlaylist ⇒ Object 



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# File 'lib/soundcloud.rb', line 52

def shufflePlaylist
  return unless @tracks.respond_to? "shuffle!"
  @tracks.shuffle!
  changed
  notify_observers :state => :shuffle, :tracks => @tracks
end