1 # -*- coding: utf-8 -*-
3 # Copyright (c) 2014 Jack Kaliko <kaliko@azylum.org>
5 # This program is free software: you can redistribute it and/or modify
6 # it under the terms of the GNU General Public License as published by
7 # the Free Software Foundation, either version 3 of the License, or
8 # (at your option) any later version.
10 # This program is distributed in the hope that it will be useful,
11 # but WITHOUT ANY WARRANTY; without even the implied warranty of
12 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 # GNU General Public License for more details.
15 # You should have received a copy of the GNU General Public License
16 # along with this program. If not, see <http://www.gnu.org/licenses/>.
21 Consume EchoNest web service
25 __author__ = 'Jack Kaliko'
30 from sima.lib.meta import Artist
31 from sima.lib.track import Track
32 from sima.lib.http import HttpClient
33 from sima.utils.utils import WSError, WSNotFound
34 from sima.utils.utils import getws
35 if len(ECH.get('apikey')) == 23: # simple hack allowing imp.reload
39 def get_mbid(obj, foreign='foreign_ids'):
41 for frgnid in obj.get(foreign):
42 if frgnid.get('catalog') == 'musicbrainz':
43 return frgnid.get('foreign_id').split(':')[2]
48 """EchoNest http client
50 root_url = 'http://{host}/api/{version}'.format(**ECH)
53 """HTTP cache to use, in memory or persitent.
55 :param BaseCache cache: Set a cache, defaults to `False`.
63 self.http = HttpClient(cache=self.cache, stats=self.stats)
65 def _controls_answer(self, ans):
68 status = ans.get('response').get('status')
69 code = status.get('code')
73 raise WSNotFound('Artist not found')
74 raise WSError(status.get('message'))
76 def _forge_payload(self, artist, top=False):
79 payload = {'api_key': ECH.get('apikey')}
80 if not isinstance(artist, Artist):
81 raise TypeError('"{0!r}" not an Artist object'.format(artist))
83 payload.update(id='musicbrainz:artist:{0}'.format(artist.mbid))
85 payload.update(name=artist.name)
86 payload.update(bucket='id:musicbrainz')
87 payload.update(results=100)
90 aid = payload.pop('id')
91 payload.update(artist_id=aid)
93 name = payload.pop('name')
94 payload.update(artist=name)
95 payload.update(results=100)
96 payload.update(sort='song_hotttnesss-desc')
97 # > hashing the URL into a cache key
98 # return a sorted list of 2-tuple to have consistent cache
99 return sorted(payload.items(), key=lambda param: param[0])
101 def get_similar(self, artist):
102 """Fetch similar artists
104 :param sima.lib.meta.Artist artist: `Artist` to fetch similar artists from
105 :returns: generator of :class:`sima.lib.meta.Artist`
107 payload = self._forge_payload(artist)
109 ressource = '{0}/artist/similar'.format(SimaEch.root_url)
110 ans = self.http(ressource, payload)
111 self._controls_answer(ans.json()) # pylint: disable=no-member
112 for art in ans.json().get('response').get('artists'): # pylint: disable=no-member
114 yield Artist(mbid=mbid, name=art.get('name'))
116 def get_toptrack(self, artist):
117 """Fetch artist top tracks
119 :param sima.lib.meta.Artist artist: `Artist` to fetch top tracks from
120 :returns: generator of :class:`sima.lib.track.Track`
122 payload = self._forge_payload(artist, top=True)
124 ressource = '{0}/song/search'.format(SimaEch.root_url)
125 ans = self.http(ressource, payload)
126 self._controls_answer(ans.json()) # pylint: disable=no-member
128 art = {'artist': artist.name,
129 'musicbrainz_artistid': artist.mbid,}
130 for song in ans.json().get('response').get('songs'): # pylint: disable=no-member
131 title = song.get('title')
132 if not art.get('musicbrainz_artistid'):
133 art['musicbrainz_artistid'] = get_mbid(song, 'artist_foreign_ids')
134 if title not in titles:
136 yield Track(title=title, **art)
140 # vim: ai ts=4 sw=4 sts=4 expandtab