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mirror of https://github.com/janeczku/calibre-web synced 2024-11-16 14:54:55 +00:00
calibre-web/cps/tasks/metadata_backup.py
2024-02-10 10:30:41 +01:00

128 lines
5.5 KiB
Python

# -*- coding: utf-8 -*-
# This file is part of the Calibre-Web (https://github.com/janeczku/calibre-web)
# Copyright (C) 2020 monkey
#
# 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/>.
import os
from lxml import etree
from cps import config, db, gdriveutils, logger
from cps.services.worker import CalibreTask
from flask_babel import lazy_gettext as N_
from ..epub_helper import create_new_metadata_backup
class TaskBackupMetadata(CalibreTask):
def __init__(self, export_language="en",
translated_title="Cover",
set_dirty=False,
task_message=N_('Backing up Metadata')):
super(TaskBackupMetadata, self).__init__(task_message)
self.log = logger.create()
self.calibre_db = db.CalibreDB(expire_on_commit=False, init=True)
self.export_language = export_language
self.translated_title = translated_title
self.set_dirty = set_dirty
def run(self, worker_thread):
if self.set_dirty:
self.set_all_books_dirty()
else:
self.backup_metadata()
def set_all_books_dirty(self):
try:
books = self.calibre_db.session.query(db.Books).all()
for book in books:
self.calibre_db.set_metadata_dirty(book.id)
self.calibre_db.session.commit()
self._handleSuccess()
except Exception as ex:
self.log.debug('Error adding book for backup: ' + str(ex))
self._handleError('Error adding book for backup: ' + str(ex))
self.calibre_db.session.rollback()
self.calibre_db.session.close()
def backup_metadata(self):
try:
metadata_backup = self.calibre_db.session.query(db.Metadata_Dirtied).all()
custom_columns = (self.calibre_db.session.query(db.CustomColumns)
.filter(db.CustomColumns.mark_for_delete == 0)
.filter(db.CustomColumns.datatype.notin_(db.cc_exceptions))
.order_by(db.CustomColumns.label).all())
count = len(metadata_backup)
i = 0
for backup in metadata_backup:
book = self.calibre_db.session.query(db.Books).filter(db.Books.id == backup.book).one_or_none()
self.calibre_db.session.query(db.Metadata_Dirtied).filter(
db.Metadata_Dirtied.book == backup.book).delete()
self.calibre_db.session.commit()
if book:
self.open_metadata(book, custom_columns)
else:
self.log.error("Book {} not found in database".format(backup.book))
i += 1
self.progress = (1.0 / count) * i
self._handleSuccess()
self.calibre_db.session.close()
except Exception as ex:
b = "NaN" if not hasattr(book, 'id') else book.id
self.log.debug('Error creating metadata backup for book {}: '.format(b) + str(ex))
self._handleError('Error creating metadata backup: ' + str(ex))
self.calibre_db.session.rollback()
self.calibre_db.session.close()
def open_metadata(self, book, custom_columns):
# package = self.create_new_metadata_backup(book, custom_columns)
package = create_new_metadata_backup(book, custom_columns, self.export_language, self.translated_title)
if config.config_use_google_drive:
if not gdriveutils.is_gdrive_ready():
raise Exception('Google Drive is configured but not ready')
gdriveutils.uploadFileToEbooksFolder(os.path.join(book.path, 'metadata.opf').replace("\\", "/"),
etree.tostring(package,
xml_declaration=True,
encoding='utf-8',
pretty_print=True).decode('utf-8'),
True)
else:
# ToDo: Handle book folder not found or not readable
book_metadata_filepath = os.path.join(config.get_book_path(), book.path, 'metadata.opf')
# prepare finalize everything and output
doc = etree.ElementTree(package)
try:
with open(book_metadata_filepath, 'wb') as f:
doc.write(f, xml_declaration=True, encoding='utf-8', pretty_print=True)
except Exception as ex:
raise Exception('Writing Metadata failed with error: {} '.format(ex))
@property
def name(self):
return "Metadata backup"
# needed for logging
def __str__(self):
if self.set_dirty:
return "Queue all books for metadata backup"
else:
return "Perform metadata backup"
@property
def is_cancellable(self):
return True