calibre-web/cps/fs.py

96 lines
3.4 KiB
Python
Raw Normal View History

# -*- 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 . import logger
from .constants import CACHE_DIR
from os import makedirs, remove
from os.path import isdir, isfile, join
from shutil import rmtree
class FileSystem:
_instance = None
_cache_dir = CACHE_DIR
def __new__(cls):
if cls._instance is None:
cls._instance = super(FileSystem, cls).__new__(cls)
cls.log = logger.create()
return cls._instance
def get_cache_dir(self, cache_type=None):
if not isdir(self._cache_dir):
try:
makedirs(self._cache_dir)
except OSError:
self.log.info(f'Failed to create path {self._cache_dir} (Permission denied).')
return False
path = join(self._cache_dir, cache_type)
if cache_type and not isdir(path):
try:
makedirs(path)
except OSError:
self.log.info(f'Failed to create path {path} (Permission denied).')
return False
return path if cache_type else self._cache_dir
def get_cache_file_dir(self, filename, cache_type=None):
path = join(self.get_cache_dir(cache_type), filename[:2])
if not isdir(path):
try:
makedirs(path)
except OSError:
self.log.info(f'Failed to create path {path} (Permission denied).')
return False
return path
def get_cache_file_path(self, filename, cache_type=None):
return join(self.get_cache_file_dir(filename, cache_type), filename) if filename else None
def get_cache_file_exists(self, filename, cache_type=None):
path = self.get_cache_file_path(filename, cache_type)
return isfile(path)
def delete_cache_dir(self, cache_type=None):
if not cache_type and isdir(self._cache_dir):
try:
rmtree(self._cache_dir)
except OSError:
self.log.info(f'Failed to delete path {self._cache_dir} (Permission denied).')
return False
path = join(self._cache_dir, cache_type)
if cache_type and isdir(path):
try:
rmtree(path)
except OSError:
self.log.info(f'Failed to delete path {path} (Permission denied).')
return False
def delete_cache_file(self, filename, cache_type=None):
path = self.get_cache_file_path(filename, cache_type)
if isfile(path):
try:
remove(path)
except OSError:
self.log.info(f'Failed to delete path {path} (Permission denied).')
return False