Class: Radiodan::MPD

Inherits:
Object
  • Object
show all
Extended by:
Forwardable
Includes:
Logging
Defined in:
lib/radiodan/adapter/mpd.rb,
lib/radiodan/adapter/mpd/ack.rb,
lib/radiodan/adapter/mpd/response.rb,
lib/radiodan/adapter/mpd/connection.rb,
lib/radiodan/adapter/mpd/playlist_parser.rb

Defined Under Namespace

Modules: PlaylistParser Classes: Ack, AckError, Connection, Response

Constant Summary collapse

COMMANDS = 
%w{stop pause clear play next previous enqueue search update}
SEARCH_SCOPE = 
%w{artist album title track name genre date composer performer comment disc filename any}

Instance Attribute Summary collapse

Instance Method Summary collapse

Methods included from Logging

included, level, level=, #logger, output, output=

Constructor Details

#initialize(options = {}) ⇒ MPD

Returns a new instance of MPD.



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# File 'lib/radiodan/adapter/mpd.rb', line 18

def initialize(options={})
  @connection = Connection.new(options)
  @connection.cmd('clear')
  @connection.cmd('update')
end

Dynamic Method Handling

This class handles dynamic methods through the method_missing method

#method_missing(method, *args, &block) ⇒ Object 



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# File 'lib/radiodan/adapter/mpd.rb', line 157

def method_missing(method, *args, &block)
  if COMMANDS.include?(method.to_s)
    cmd(method.to_s, *args, &block)
  else
    super
  end
end

Instance Attribute Details

#player ⇒ Object

Returns the value of attribute player.



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# File 'lib/radiodan/adapter/mpd.rb', line 16

def player
  @player
end

Instance Method Details

#enqueue(tracks) ⇒ Object 



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# File 'lib/radiodan/adapter/mpd.rb', line 81

def enqueue(tracks)
  tracks.each do |track|
    cmd(%Q{add "#{track[:file]}"})
  end
end

#play(song_number = nil) ⇒ Object 



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# File 'lib/radiodan/adapter/mpd.rb', line 87

def play(song_number=nil)
  cmd("play #{song_number}")
end

#playlist ⇒ Object 



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# File 'lib/radiodan/adapter/mpd.rb', line 91

def playlist
  begin
    status = cmd('status')
    tracks = cmd('playlistinfo')
  
    playlist = PlaylistParser.parse(status, tracks)
    playlist
  rescue  Playlist::StateError,
          Playlist::ModeError,
          Playlist::PositionError,
          Playlist::SeekError,
          Playlist::VolumeError => e
    logger.warn("Playlist parsing raised error: #{e}")
    retry
  end
end

#playlist=(playlist) ⇒ Object 



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# File 'lib/radiodan/adapter/mpd.rb', line 49

def playlist=(playlist)
  # get rid of current playlist, stop playback
  clear
  
  # set random & repeat
  cmd(%Q{random #{boolean_to_s(playlist.random?)}})
  cmd(%Q{repeat #{boolean_to_s(playlist.repeat?)}})
  
  # set volume
  begin
    volume = playlist.volume
  rescue AckError => e
    logger.error e.msg
  end

  if playlist.empty?
    logger.error 'Playlist empty, nothing to do'
    return false
  end

  if enqueue playlist.tracks
    # set for seek position (will play from seek point)
    cmd(%Q{seek #{playlist.position} #{Integer(playlist.seek)}})
  else
    raise "Cannot load playlist #{playlist}" 
  end
end

#respond_to?(method) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/radiodan/adapter/mpd.rb', line 149

def respond_to?(method)
  if COMMANDS.include?(method.to_s)
    true
  else
    super
  end
end

#search(args) ⇒ Object

search :artist => “Bob Marley”, :exact => true search :filename => ‘./bob.mp3’ search “Bob Marley”



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# File 'lib/radiodan/adapter/mpd.rb', line 111

def search(args)
  if args.nil?
    logger.error 'no query found' 
    return []
  end
  
  if args.to_s == args
    args = {'any' => args}
  end
  
  if args.delete(:exact)
    command = 'find'
  else
    command = 'search'
  end
  
  if args.keys.size > 1
    raise 'Too many arguments for search'
  end
  
  scope = args.keys.first.to_s
  term  = args.values.first
  
  unless SEARCH_SCOPE.include?(scope)
    raise "Unknown search scope #{scope}"
  end
  
  cmd_string = %Q{#{command} #{scope} "#{term}"}
      
  tracks = cmd(cmd_string)

  if tracks.respond_to?(:collect)
    tracks.collect { |t| Track.new(t) }
  else
    []
  end
end

#volume=(new_volume) ⇒ Object 



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# File 'lib/radiodan/adapter/mpd.rb', line 77

def volume=(new_volume)
  cmd(%Q{setvol #{Integer(new_volume)}})
end