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# -*- coding: utf-8 -*-
## lastfmtracklistener.py
##
## Copyright (C) 2007 Olivier Mehani <shtrom-gajim@ssji.net>
## Heavily based on music_track_listener.py:
## Copyright (C) 2006 Gustavo Carneiro <gjcarneiro@gmail.com>
## Copyright (C) 2006 Nikos Kouremenos <kourem@gmail.com>
##
## This program is free software; you can redistribute it and/or modify
## it under the terms of the GNU General Public License as published
## by the Free Software Foundation; version 2 only.
##
## This program is distributed in the hope that it will be useful,
## but WITHOUT ANY WARRANTY; without even the implied warranty of
## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
## GNU General Public License for more details.
##
import gobject
from lastfm import LastFM
class LastFMTrackInfo(object):
__slots__ = ['title', 'album', 'artist']
def __eq__(self, other):
if self.__class__ != other.__class__:
return False
return self.title == other.title and self.album == other.album and \
self.artist == other.artist
def __ne__(self, other):
return not self.__eq__(other)
class LastFMTrackListener(gobject.GObject):
__gsignals__ = {
'music-track-changed': (gobject.SIGNAL_RUN_LAST, None, (object,)),
}
# polling period in milliseconds
INTERVAL = 60000 #LastFM.MAX_DELAY * 250 # 1/4 of LastFM's delay (in s)
_instance = None
@classmethod
def get(cls, username):
if cls._instance is None:
cls._instance = cls(username)
else:
cls._instance._lfm.setUsername(username)
return cls._instance
def __init__(self, username):
super(LastFMTrackListener, self).__init__()
self._lfm_user = username
self._lfm = LastFM(self._lfm_user)
self._last_playing_music = None
self._lastfm_music_track_change()
gobject.timeout_add(self.INTERVAL, self._lastfm_periodic_check)
def _lastfm_properties_extract(self, song_tuple):
if song_tuple:
info = LastFMTrackInfo()
info.title = song_tuple[LastFM.NAME]
info.album = song_tuple[LastFM.ALBUM]
info.artist = song_tuple[LastFM.ARTIST]
return info
return None
def _lastfm_periodic_check(self):
if self._lfm.updateData():
self._lastfm_music_track_change()
return True
def _lastfm_music_track_change(self):
info = self._lastfm_properties_extract(
self._lfm.getLastRecentSong())
self._last_playing_music = info
self.emit('music-track-changed', info)
def get_playing_track(self):
'''Return a LastFMTrackInfo for the currently playing
song, or None if no song is playing'''
return self._last_playing_music
# here we test :)
if __name__ == '__main__':
from sys import argv
if len(argv) != 2:
raise Exception("Incorrect number of arguments. Only the Last.fm username is required.")
def music_track_change_cb(listener, music_track_info):
if music_track_info is None:
print "Stop!"
else:
print 'Now playing: "%s" by %s' % (
music_track_info.title, music_track_info.artist)
listener = LastFMTrackListener.get(argv[1])
listener.connect('music-track-changed', music_track_change_cb)
track = listener.get_playing_track()
if track is None:
print 'Now not playing anything'
else:
print 'Now playing: "%s" by %s' % (track.title, track.artist)
gobject.MainLoop().run()
# vim: se ts=3:
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