141 lines
4.1 KiB
Python
141 lines
4.1 KiB
Python
import os
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import csv
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import json
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import logging
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from operator import attrgetter
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from collections import namedtuple
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import requests
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import arrow
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import settings
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import keys
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from pprint import pprint
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Track = namedtuple(
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'Track',
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['timestamp', 'artist', 'album', 'title', 'artistid', 'albumid', 'img']
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)
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class cached_property(object):
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""" extermely simple cached_property decorator:
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whenever something is called as @cached_property, on first run, the
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result is calculated, then the class method is overwritten to be
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a property, contaning the result from the method
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"""
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def __init__(self, method, name=None):
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self.method = method
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self.name = name or method.__name__
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def __get__(self, inst, cls):
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if inst is None:
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return self
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result = self.method(inst)
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setattr(inst, self.name, result)
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return result
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class LastFM(object):
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url = 'http://ws.audioscrobbler.com/2.0/'
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def __init__(self):
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self.params = {
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'method': 'user.getrecenttracks',
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'user': keys.lastfm.get('username'),
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'api_key': keys.lastfm.get('key'),
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'format': 'json',
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'limit': '200'
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}
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if os.path.isfile(self.target):
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mtime = os.path.getmtime(self.target)
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self.params.update({'from': mtime})
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@property
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def target(self):
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return os.path.join(
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settings.paths.get('archive'),
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'lastfm.csv'
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)
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@cached_property
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def existing(self):
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timestamps = []
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with open(self.target, 'r') as f:
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r = csv.reader(f)
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for row in r:
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try:
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timestamps.append(arrow.get(row[0]).timestamp)
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except Exception as e:
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logging.error('arrow failed on row %s', row)
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continue
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return timestamps
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@property
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def exists(self):
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return os.path.isfile(self.target)
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def extracttracks(self, data):
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tracks = []
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if not data:
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return tracks
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for track in data.get('track', []):
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if 'date' not in track:
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continue
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ts = arrow.get(int(track.get('date').get('uts')))
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if ts.timestamp in self.existing:
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continue
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entry = Track(
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ts.format('YYYY-MM-DDTHH:mm:ssZ'),
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track.get('artist').get('#text', ''),
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track.get('album').get('#text', ''),
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track.get('name', ''),
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track.get('artist').get('mbid', ''),
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track.get('album').get('mbid', ''),
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track.get('image', [])[-1].get('#text', ''),
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)
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tracks.append(entry)
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return tracks
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def fetch(self):
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r = requests.get(self.url, params=self.params)
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return json.loads(r.text).get('recenttracks')
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def run(self):
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try:
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data = self.fetch()
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tracks = self.extracttracks(data)
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total = int(data.get('@attr').get('totalPages'))
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current = int(data.get('@attr').get('page'))
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cntr = total - current
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except Exception as e:
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logging.error('Something went wrong: %s', e)
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return
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if not len(tracks):
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return
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while cntr > 0:
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current = current + 1
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cntr = total - current
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logging.info('requesting page #%d of paginated results', current)
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self.params.update({
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'page': current
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})
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data = self.fetch()
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tracks = tracks + self.extracttracks(data)
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if not self.exists:
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with open(self.target, 'w') as f:
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writer = csv.DictWriter(f, fieldnames=Track._fields)
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writer.writeheader()
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if len(tracks):
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with open(self.target, 'a') as f:
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writer = csv.writer(f, quoting=csv.QUOTE_NONNUMERIC)
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writer.writerows(sorted(tracks, key=attrgetter('timestamp')))
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if __name__ == '__main__':
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lfm = LastFM()
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lfm.run()
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