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# -*- coding: utf-8 -*-
"""Last.fm similarity plugin for Quod Libet."""
import json
from urllib.parse import quote
from urllib.request import urlopen
from urllib.error import URLError
import random
from gi.repository import GLib, Gtk
from quodlibet import _, app, config
from quodlibet.plugins.events import EventPlugin
from quodlibet.qltk import Icons
from quodlibet.query import Query
from quodlibet.util.dprint import print_d
class LastFMSimilarity(EventPlugin):
"""Last.fm similarity event plugin."""
PLUGIN_ID = "Last.fm Similarity"
PLUGIN_NAME = _("Last.fm Similarity")
PLUGIN_DESC = _("Finds a similar song using Last.fm's track similarity API"
" and adds it to the queue.")
PLUGIN_ICON = Icons.NETWORK_WORKGROUP
LAST_FM_API_URI = "http://ws.audioscrobbler.com/2.0/"
API_KEY = "e94b09aa2c04ab264deb7a7ae02ecd05"
LAST_FM_API_METHODS = {
"similar_artists": "artist.getSimilar",
"similar_tracks": "track.getSimilar",
}
def __init__(self):
"""Initialize the plugin."""
self._blacklist_track_count = config.getint(
"plugins", "lastfm_similarity_blacklist_tracks", 10)
self._blacklist_artist_count = config.getint(
"plugins", "lastfm_similarity_blacklist_artists", 10)
self._last_tracks = []
self._last_artists = []
def PluginPreferences(self, parent):
"""Plugin Preferences."""
def blacklist_track_changed(entry):
self._blacklist_track_count = int(entry.get_value())
config.set("plugins", "lastfm_similarity_blacklist_tracks",
self._blacklist_track_count)
def blacklist_artist_changed(entry):
self._blacklist_artist_count = int(entry.get_value())
config.set("plugins", "lastfm_similarity_blacklist_artist",
self._blacklist_artist_count)
table = Gtk.Table(rows=2, columns=2)
table.set_row_spacings(6)
table.set_col_spacings(6)
table.attach(
Gtk.Label(
label=_("Number of recently played tracks to blacklist:")),
0, 1, 0, 1)
track_entry = Gtk.SpinButton(adjustment=Gtk.Adjustment.new(
self._blacklist_track_count, 0, 1000, 1, 10, 0))
track_entry.connect("value-changed", blacklist_track_changed)
table.attach(track_entry, 1, 2, 0, 1)
table.attach(
Gtk.Label(
label=_("Number of recently played artists to blacklist:")),
0, 1, 1, 2)
artist_entry = Gtk.SpinButton(adjustment=Gtk.Adjustment.new(
self._blacklist_artist_count, 0, 1000, 1, 10, 0))
artist_entry.connect("value-changed", blacklist_artist_changed)
table.attach(artist_entry, 1, 2, 1, 2)
return table
def _check_artist_played(self, artist):
for played_artist in self._last_artists:
if artist.upper() == played_artist.upper():
return True
return False
def _check_track_played(self, track):
if track in self._last_tracks:
return True
else:
return False
def _add_played_artists(self, artists):
for artist in artists:
if artist not in self._last_artists:
self._last_artists.append(artist)
def _build_uri(self, request):
return "".join((self.LAST_FM_API_URI, request, "&api_key=",
self.API_KEY, "&format=json"))
def _find_similar_tracks(self, trackname, artistname, mbid=None, limit=50):
request = "".join(("?method=",
self.LAST_FM_API_METHODS["similar_tracks"]))
if mbid:
print_d("Trying with mbid {}".format(mbid))
request = "".join((request, "&mbid=", mbid))
else:
print_d("Trying with {} - {}".format(artistname.splitlines()[0],
trackname))
request = "".join((request, "&track=", quote(trackname), "&artist=",
quote(artistname.splitlines()[0])))
request = "".join((request, "&limit={}".format(limit)))
uri = self._build_uri(request)
stream = None
try:
stream = urlopen(uri)
except URLError:
return []
if stream.getcode() == 200:
similar_tracks = []
try:
response = json.loads(str(stream.read(), "utf-8"))
for track in response["similartracks"]["track"]:
similar_tracks.append(
(track["artist"]["name"], track["name"]))
return similar_tracks
except KeyError:
if mbid:
return self._find_similar_tracks(trackname, artistname)
return []
else:
return []
def _find_similar_artists(self, artistname, mbid=None, limit=40):
request = "".join(("?method=",
self.LAST_FM_API_METHODS["similar_artists"]))
if mbid:
print_d("Trying with artist mbid {}".format(mbid))
request = "".join((request, "&mbid=", mbid))
else:
print_d("Trying with {}".format(artistname.splitlines()[0]))
request = "".join((request, "&artist=",
quote(artistname.splitlines()[0])))
request = "".join((request, "&limit={}".format(limit)))
uri = self._build_uri(request)
stream = None
try:
stream = urlopen(uri)
except URLError:
return []
if stream.getcode() == 200:
similar_artists = []
try:
response = json.loads(str(stream.read(), "utf-8"))
for artist in response["similarartists"]["artist"]:
similar_artists.append(artist["name"])
return similar_artists
except KeyError:
if mbid:
return self._find_similar_artists(artistname)
return []
else:
return []
def on_change(self, song):
"""Find similar track on song change."""
artist = song.get("artist").splitlines()[0]
track = song.get("title")
candidates = []
try:
mbid = song.get("musicbrainz_releasetrackid")
candidates = self._find_similar_tracks(track, artist, mbid)
except KeyError:
candidates = self._find_similar_tracks(track, artist)
if candidates:
for candidate in candidates:
if not self._check_artist_played(candidate[0]):
print_d("[similarity] found track match: %s - %s"
% (candidate[0], candidate[1]))
query = Query.StrictQueryMatcher(
"&(artist = \"%s\", title = \"%s\")"
% (candidate[0], candidate[1]))
try:
results = list(filter(query.search, app.library))
if results:
song = results[0]
if self._check_track_played(song.get("~filename")):
continue
app.window.playlist.enqueue([song])
return
except AttributeError:
pass
artist_candidates = self._find_similar_artists(artist)
for artist in artist_candidates:
if not self._check_artist_played(artist):
print_d("[similarity] found artist match: %s" % artist)
query = Query.StrictQueryMatcher(
"&(artist = \"%s\", title != \"[silence]\")" % artist)
try:
results = list(filter(query.search, app.library))
candidate_song_length = len(results)
for dummy in range(candidate_song_length):
idx = random.randint(0, (candidate_song_length - 1))
song = results[idx]
if not self._check_track_played(song.get("~filename")):
app.window.playlist.enqueue([song])
return
except AttributeError:
pass
def plugin_on_song_started(self, song):
"""Append current track to last played tracks and artists."""
self._last_tracks.append(song.get("~filename"))
self._add_played_artists(song.get("artist").splitlines())
GLib.idle_add(self.on_change, song)
def plugin_on_song_ended(self, song, stopped):
"""Append current track to last played tracks and artists."""
track_count = len(self._last_tracks)
artist_count = len(self._last_artists)
if track_count > self._blacklist_track_count:
self._last_tracks = self._last_tracks[
(track_count - self._blacklist_track_count):track_count]
if artist_count > self._blacklist_artist_count:
self._last_artists = self._last_artists[
(artist_count - self._blacklist_artist_count):artist_count]
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