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cover.py
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cover.py
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# -*- coding: utf-8 -*-
#
# Copyright © 2009-2011 Alexander Kojevnikov <alexander@kojevnikov.com>
#
# muspy is free software: you can redistribute it and/or modify
# it under the terms of the GNU Affero General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# muspy is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU Affero General Public License for more details.
#
# You should have received a copy of the GNU Affero General Public License
# along with muspy. If not, see <http://www.gnu.org/licenses/>.
import os
import time
class Cover(object):
DELAY = 7 * 24 * 60 * 60 # 7 days
def __init__(self, mbid, image=None):
self._base = os.path.abspath(os.path.dirname(__file__) + '/..')
self._default = os.path.join(self._base, 'static/cover.jpg')
self.found = False
if len(mbid) != 36:
self.found = True
self.image = self._read(self._default)
return
self._path = os.path.join(self._base, 'covers', mbid[0:2], mbid[2:4], mbid + '.jpg')
if image:
self._create_dirs()
with open(self._path, 'wb') as f:
f.write(image)
self.found = True
self.image = image
return
if os.path.exists(self._path):
if os.path.getsize(self._path):
self.found = True
self.image = self._read(self._path)
else:
# Empty file, check modification time
mtime = os.path.getmtime(self._path)
if time.time() - mtime > Cover.DELAY:
# Old file, delete.
os.remove(self._path)
else:
self.found = True
self.image = self._read(self._default)
return
# Create an empty file.
self._create_dirs()
f = open(self._path, 'wb')
f.close()
self.image = self._read(self._default)
def _read(self, path):
with open(path, 'rb') as f:
return f.read()
def _create_dirs(self):
dirname = os.path.dirname(self._path)
if not os.path.exists(dirname):
os.makedirs(dirname)