def _tags_for_track(artist_name, track_name):
"""
Get the top tags for a track. Also fetches tags for the artist. Only
includes tracks that break a certain threshold of usage, defined by
settings.LASTFM_TAG_USAGE_THRESHOLD (which defaults to 15).
"""
urls = [
ARTIST_TAGS_URL % (urllib.quote(artist_name)),
TRACK_TAGS_URL % (urllib.quote(artist_name), urllib.quote(track_name)),
]
tags = set()
for url in urls:
log.debug("Fetching tags from %r", url)
try:
xml = utils.getxml(url)
except HttpLib2Error, e:
if e.code == 408:
return ""
else:
raise
for t in xml.getiterator("tag"):
count = utils.safeint(t.find("count").text)
if count >= getattr(settings, "LASTFM_TAG_USAGE_THRESHOLD", 15):
tags.add(slugify(smart_unicode(t.find("name").text)))
def update():
last_update_date = Item.objects.get_last_update_of_model(Track)
log.debug("Last update date: %s", last_update_date)
xml = utils.getxml(RECENT_TRACKS_URL % settings.LASTFM_USERNAME)
for track in xml.getiterator("track"):
artist = track.find("artist")
artist_name = smart_unicode(artist.text)
artist_mbid = artist.get("mbid")
track_name = smart_unicode(track.find("name").text)
track_mbid = smart_unicode(track.find("mbid").text)
url = smart_unicode(track.find("url").text)
timestamp = datetime.datetime.fromtimestamp(int(track.find("date").get("uts")))
if timestamp > last_update_date:
log.debug("Handling track: %r - %r", artist_name, track_name)
tags = _tags_for_track(artist_name, track_name)
_handle_track(artist_name, artist_mbid, track_name, track_mbid, url, timestamp, tags)