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#!/usr/bin/env ruby
#
# Copyright 2009 David Vazgenovich Shakaryan <dvshakaryan@gmail.com>
# Distributed under the terms of the GNU General Public License v3.
# See http://www.gnu.org/licenses/gpl.txt for the full license text.

module MPDPlaybackControl
  # Begins playing the playlist. If argument is supplied, begin at specified
  # song position.
  def play songpos=false
    command = 'play'
    command << ' ' + songpos.to_s if songpos

    return send_request command
  end

  # Begins playing the playlist. If argument is supplied, begin at specified
  # song id.
  def playid songid=false
    command = 'playid'
    command << ' ' + songid.to_s if songid

    return send_request command
  end

  # Sets pause state.
  #
  # Accepts an argument of _true_ to enable or _false_ to disable.
  # If no argument is given, defaults to _true_.
  def pause state=true
    return send_request 'pause %s' % state.to_i
  end

  # Stops playing.
  def stop
    return send_request 'stop'
  end

  # Plays next song in the playlist.
  def next
    return send_request 'next'
  end

  # Plays previous song in the playlist.
  def previous
    return send_request 'previous'
  end

  # Seeks to the given position of the given song.
  def seek songpos, time
    return send_request 'seek %s %s' % [songpos, time]
  end

  # Seeks to the given position of the given song id.
  def seekid songid, time
    return send_request 'seekid %s %s' % [songid, time]
  end

  # Returns +true+ if playing.
  # Otherwise, returns +false+.
  def playing?
    return true if status[:state] == 'play'
    return false
  end

  # Returns +true+ if paused.
  # Otherwise, returns +false+.
  def paused?
    return true if status[:state] == 'pause'
    return false
  end

  # Returns +true+ if stopped.
  # Otherwise, returns +false+.
  def stopped?
    return true if status[:state] == 'stop'
    return false
  end
end