__author__ = 'Jack Kaliko'
-import logging
-
from datetime import datetime, timedelta
-from time import sleep
-from requests import get, Timeout, ConnectionError
+from requests import get, Request, Timeout, ConnectionError
from sima import ECH
from sima.lib.meta import Artist
-from sima.utils.utils import getws
-if len(ECH.get('apikey')) == 23:
+from sima.lib.track import Track
+from sima.utils.utils import WSError, WSNotFound, WSTimeout, WSHTTPError
+from sima.utils.utils import getws, Throttle, Cache, purge_cache
+if len(ECH.get('apikey')) == 23: # simple hack allowing imp.reload
getws(ECH)
# Some definitions
SOCKET_TIMEOUT = 4
-class EchoError(Exception):
- pass
-
-class EchoNotFound(EchoError):
- pass
-
-class EchoTimeout(EchoError):
- pass
-
-class EchoHTTPError(EchoError):
- pass
-
-class Throttle():
- def __init__(self, wait):
- self.wait = wait
- self.last_called = datetime.now()
-
- def __call__(self, func):
- def wrapper(*args, **kwargs):
- while self.last_called + self.wait > datetime.now():
- sleep(0.1)
- result = func(*args, **kwargs)
- self.last_called = datetime.now()
- return result
- return wrapper
-
-
-class Cache():
- def __init__(self, elem, last=None):
- self.elem = elem
- self.requestdate = last
- if not last:
- self.requestdate = datetime.utcnow()
-
- def created(self):
- return self.requestdate
-
- def get(self):
- return self.elem
-
-
-class SimaEch():
- """
+class SimaEch:
+ """EchoNest http client
"""
root_url = 'http://{host}/api/{version}'.format(**ECH)
cache = {}
timestamp = datetime.utcnow()
+ ratelimit = None
+ name = 'EchoNest'
def __init__(self, cache=True):
self.artist = None
self._ressource = None
self.current_element = None
self.caching = cache
- self.purge_cache()
+ purge_cache(self.__class__)
def _fetch(self, payload):
"""Use cached elements or proceed http request"""
self.current_element = SimaEch.cache.get(url).elem
return
try:
- self._fetch_lfm(payload)
+ self._fetch_ws(payload)
except Timeout:
- raise EchoTimeout('Failed to reach server within {0}s'.format(
+ raise WSTimeout('Failed to reach server within {0}s'.format(
SOCKET_TIMEOUT))
except ConnectionError as err:
- raise EchoError(err)
+ raise WSError(err)
@Throttle(WAIT_BETWEEN_REQUESTS)
- def _fetch_lfm(self, payload):
+ def _fetch_ws(self, payload):
"""fetch from web service"""
req = get(self._ressource, params=payload,
timeout=SOCKET_TIMEOUT)
- if 'x-ratelimit-remaining' in req.headers:
- logging.debug('x-ratelimit-remaining {x-ratelimit-remaining}'.format(**req.headers))
+ self.__class__.ratelimit = req.headers.get('x-ratelimit-remaining', None)
if req.status_code is not 200:
- raise EchoHTTPError(req.status_code)
+ raise WSHTTPError('{0.status_code}: {0.reason}'.format(req))
self.current_element = req.json()
self._controls_answer()
if self.caching:
Cache(self.current_element)})
def _controls_answer(self):
- """Controls last.fm answer.
+ """Controls answer.
"""
status = self.current_element.get('response').get('status')
code = status.get('code')
if code is 0:
return True
if code is 5:
- raise EchoNotFound('Artist not found: "{0}"'.format(self.artist))
- raise EchoError(status.get('message'))
+ raise WSNotFound('Artist not found: "{0}"'.format(self.artist))
+ raise WSError(status.get('message'))
- def _forge_payload(self, artist):
- """
+ def _forge_payload(self, artist, top=False):
+ """Build payload
"""
payload = {'api_key': ECH.get('apikey')}
if not isinstance(artist, Artist):
payload.update(
id='musicbrainz:artist:{0}'.format(artist.mbid))
else:
- payload.update(name=artist.name)
+ payload.update(name=artist.name)
payload.update(bucket='id:musicbrainz')
- payload.update(results=30)
+ payload.update(results=100)
+ if top:
+ if artist.mbid:
+ aid = payload.pop('id')
+ payload.update(artist_id=aid)
+ else:
+ name = payload.pop('name')
+ payload.update(artist=name)
+ payload.update(results=100)
+ payload.update(sort='song_hotttnesss-desc')
return payload
- def purge_cache(self, age=4):
- now = datetime.utcnow()
- if now.hour == SimaEch.timestamp.hour:
- return
- SimaEch.timestamp = datetime.utcnow()
- cache = SimaEch.cache
- delta = timedelta(hours=age)
- for url in list(cache.keys()):
- timestamp = cache.get(url).created()
- if now - timestamp > delta:
- cache.pop(url)
-
def get_similar(self, artist=None):
- """
+ """Fetch similar artists
"""
payload = self._forge_payload(artist)
# Construct URL
artist = {}
mbid = None
if 'foreign_ids' in art:
- for frgnid in art.get('foreign_ids'):
- if frgnid.get('catalog') == 'musicbrainz':
- mbid = frgnid.get('foreign_id').lstrip('musicbrainz:artist:')
+ for frgnid in art.get('foreign_ids'):
+ if frgnid.get('catalog') == 'musicbrainz':
+ mbid = frgnid.get('foreign_id'
+ ).lstrip('musicbrainz:artist:')
yield Artist(mbid=mbid, name=art.get('name'))
+ def get_toptrack(self, artist=None):
+ """Fetch artist top tracks
+ """
+ payload = self._forge_payload(artist, top=True)
+ # Construct URL
+ self._ressource = '{0}/song/search'.format(SimaEch.root_url)
+ self._fetch(payload)
+ titles = list()
+ artist = {
+ 'artist': artist.name,
+ 'musicbrainz_artistid': artist.mbid,
+ }
+ for song in self.current_element.get('response').get('songs'):
+ title = song.get('title')
+ if title not in titles:
+ titles.append(title)
+ yield Track(title=title, **artist)
+
# VIM MODLINE
# vim: ai ts=4 sw=4 sts=4 expandtab
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