calibre-web/cps/fs.py

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# -*- coding: utf-8 -*-
# This file is part of the Calibre-Web (https://github.com/janeczku/calibre-web)
# Copyright (C) 2020 mmonkey
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# This program 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 General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program. If not, see <http://www.gnu.org/licenses/>.
from __future__ import division, print_function, unicode_literals
from .constants import CACHE_DIR
from os import listdir, makedirs, remove
from os.path import isdir, isfile, join
from shutil import rmtree
CACHE_TYPE_THUMBNAILS = 'thumbnails'
class FileSystem:
_instance = None
_cache_dir = CACHE_DIR
def __new__(cls):
if cls._instance is None:
cls._instance = super(FileSystem, cls).__new__(cls)
return cls._instance
def get_cache_dir(self, cache_type=None):
if not isdir(self._cache_dir):
makedirs(self._cache_dir)
if cache_type and not isdir(join(self._cache_dir, cache_type)):
makedirs(join(self._cache_dir, cache_type))
return join(self._cache_dir, cache_type) if cache_type else self._cache_dir
def get_cache_file_path(self, filename, cache_type=None):
return join(self.get_cache_dir(cache_type), filename) if filename else None
def list_cache_files(self, cache_type=None):
path = self.get_cache_dir(cache_type)
return [file for file in listdir(path) if isfile(join(path, file))]
def list_existing_cache_files(self, filenames, cache_type=None):
path = self.get_cache_dir(cache_type)
return [file for file in listdir(path) if isfile(join(path, file)) and file in filenames]
def list_missing_cache_files(self, filenames, cache_type=None):
path = self.get_cache_dir(cache_type)
return [file for file in listdir(path) if isfile(join(path, file)) and file not in filenames]
def delete_cache_dir(self, cache_type=None):
if not cache_type and isdir(self._cache_dir):
rmtree(self._cache_dir)
if cache_type and isdir(join(self._cache_dir, cache_type)):
rmtree(join(self._cache_dir, cache_type))
def delete_cache_file(self, filename, cache_type=None):
if isfile(join(self.get_cache_dir(cache_type), filename)):
remove(join(self.get_cache_dir(cache_type), filename))