def collect_song(dirname, filename):
"""
Collect a single song.
dirname -- name of the containing directory
filename -- name of the song file
Throws ValueError if the file doesn't exist, isn't a song,
or lacks metadata information 'name' and 'artist'.
"""
filepath = os.path.join(dirname, filename)
# TODO check if song must be updated instead of added
try:
raw = mutagen.File(filepath)
song = Song(original=filename,
name=raw.get('title')[0],
artist=raw.get('artist')[0],
genre=raw.get('genre', [''])[0],
album=raw.get('album', [''])[0],
mime='audio/ogg')
song.save()
except Exception as e:
raise ValueError('Could not collect file %s' % filepath)
target_url = os.path.join(TARGET_DIR, song.filename())
shutil.copy(filepath, target_url)
