backup metadata first step
This commit is contained in:
Ozzieisaacs
parent
110d283a50
commit
ca0ee5d391
22
cps/db.py
22
cps/db.py
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@ -322,6 +322,15 @@ class Data(Base):
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return u"<Data('{0},{1}{2}{3}')>".format(self.book, self.format, self.uncompressed_size, self.name)
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class Metadata_Dirtied(Base):
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__tablename__ = 'metadata_dirtied'
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id = Column(Integer, primary_key=True, autoincrement=True)
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book = Column(Integer, ForeignKey('books.id'), nullable=False, unique=True)
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def __init__(self, book):
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self.book = book
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class Books(Base):
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__tablename__ = 'books'
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@ -390,6 +399,9 @@ class CustomColumns(Base):
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display_dict = json.loads(self.display)
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return display_dict
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def to_json(self):
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pass
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class AlchemyEncoder(json.JSONEncoder):
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@ -642,6 +654,16 @@ class CalibreDB:
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def get_book_format(self, book_id, file_format):
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return self.session.query(Data).filter(Data.book == book_id).filter(Data.format == file_format).first()
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def set_metadata_dirty(self, book_id):
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if not self.session.query(Metadata_Dirtied).filter(Metadata_Dirtied.book==book_id).one_or_none():
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self.session.add(Metadata_Dirtied(book_id))
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def delete_dirty_metadata(self, book_id):
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try:
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self.session.query(Metadata_Dirtied).filter(Metadata_Dirtied.book==book_id).delete()
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self.session.commit()
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except (OperationalError) as e:
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self.session.rollback()
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log.error("Database error: {}".format(e))
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# Language and content filters for displaying in the UI
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def common_filters(self, allow_show_archived=False, return_all_languages=False):
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@ -203,6 +203,7 @@ def edit_book(book_id):
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if modify_date:
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book.last_modified = datetime.utcnow()
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kobo_sync_status.remove_synced_book(edited_books_id, all=True)
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calibre_db.set_metadata_dirty(book.id)
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calibre_db.session.merge(book)
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calibre_db.session.commit()
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@ -277,6 +278,8 @@ def upload():
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move_coverfile(meta, db_book)
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if modify_date:
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calibre_db.set_metadata_dirty(book_id)
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# save data to database, reread data
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calibre_db.session.commit()
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@ -555,6 +558,7 @@ def table_xchange_author_title():
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renamed_author=renamed)
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if modify_date:
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book.last_modified = datetime.utcnow()
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calibre_db.set_metadata_dirty(book.id)
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try:
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calibre_db.session.commit()
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except (OperationalError, IntegrityError, StaleDataError) as e:
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@ -578,6 +578,7 @@ def deleteDatabaseEntry(ID):
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# Gets cover file from gdrive
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# ToDo: Check is this right everyone get read permissions on cover files?
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def get_cover_via_gdrive(cover_path):
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df = getFileFromEbooksFolder(cover_path, 'cover.jpg')
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if df:
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@ -600,6 +601,29 @@ def get_cover_via_gdrive(cover_path):
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else:
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return None
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# Gets cover file from gdrive
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def get_metadata_backup_via_gdrive(metadata_path):
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df = getFileFromEbooksFolder(metadata_path, 'metadata.opf')
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if df:
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if not session.query(PermissionAdded).filter(PermissionAdded.gdrive_id == df['id']).first():
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df.GetPermissions()
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df.InsertPermission({
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'type': 'anyone',
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'value': 'anyone',
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'role': 'writer', # ToDo needs write access
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'withLink': True})
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permissionAdded = PermissionAdded()
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permissionAdded.gdrive_id = df['id']
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session.add(permissionAdded)
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try:
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session.commit()
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except OperationalError as ex:
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log.error_or_exception('Database error: {}'.format(ex))
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session.rollback()
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return df.metadata.get('webContentLink')
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else:
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return None
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# Creates chunks for downloading big files
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def partial(total_byte_len, part_size_limit):
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s = []
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@ -19,7 +19,6 @@
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import os
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import io
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import sys
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import mimetypes
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import re
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import shutil
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@ -685,7 +684,8 @@ def update_dir_structure(book_id,
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def delete_book(book, calibrepath, book_format):
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if not book_format:
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clear_cover_thumbnail_cache(book.id) ## here it breaks
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clear_cover_thumbnail_cache(book.id) ## here it breaks
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calibre_db.delete_dirty_metadata(book.id)
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if config.config_use_google_drive:
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return delete_book_gdrive(book, book_format)
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else:
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@ -23,7 +23,7 @@ from .services.background_scheduler import BackgroundScheduler, use_APScheduler
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from .tasks.database import TaskReconnectDatabase
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from .tasks.thumbnail import TaskGenerateCoverThumbnails, TaskGenerateSeriesThumbnails, TaskClearCoverThumbnailCache
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from .services.worker import WorkerThread
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from .tasks.metadata_backup import TaskBackupMetadata
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def get_scheduled_tasks(reconnect=True):
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tasks = list()
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@ -32,6 +32,10 @@ def get_scheduled_tasks(reconnect=True):
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if reconnect:
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tasks.append([lambda: TaskReconnectDatabase(), 'reconnect', False])
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# ToDo make configurable. Generate metadata.opf file for each changed book
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if True:
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tasks.append([lambda: TaskBackupMetadata(), 'backup metadata', False])
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# Generate all missing book cover thumbnails
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if config.schedule_generate_book_covers:
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tasks.append([lambda: TaskClearCoverThumbnailCache(0), 'delete superfluous book covers', True])
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@ -91,6 +95,7 @@ def should_task_be_running(start, duration):
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end_time = start_time + datetime.timedelta(hours=duration // 60, minutes=duration % 60)
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return start_time < now < end_time
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def calclulate_end_time(start, duration):
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start_time = datetime.datetime.now().replace(hour=start, minute=0)
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return start_time + datetime.timedelta(hours=duration // 60, minutes=duration % 60)
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174
cps/tasks/metadata_backup.py
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174
cps/tasks/metadata_backup.py
Normal file
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@ -0,0 +1,174 @@
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# -*- coding: utf-8 -*-
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# This file is part of the Calibre-Web (https://github.com/janeczku/calibre-web)
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# Copyright (C) 2020 monkey
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#
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# This program is free software: you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation, either version 3 of the License, or
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# (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program. If not, see <http://www.gnu.org/licenses/>.
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import datetime
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import os
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import json
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from urllib.request import urlopen
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from lxml import etree
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from html import escape
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from cps import config, db, fs, gdriveutils, logger, ub
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from cps.services.worker import CalibreTask, STAT_CANCELLED, STAT_ENDED
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from flask_babel import lazy_gettext as N_
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OPF_NAMESPACE = "http://www.idpf.org/2007/opf"
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PURL_NAMESPACE = "http://purl.org/dc/elements/1.1/"
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OPF = "{%s}" % OPF_NAMESPACE
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PURL = "{%s}" % PURL_NAMESPACE
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etree.register_namespace("opf", OPF_NAMESPACE)
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etree.register_namespace("dc", PURL_NAMESPACE)
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OPF_NS = {None: OPF_NAMESPACE} # the default namespace (no prefix)
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NSMAP = {'dc': PURL_NAMESPACE, 'opf': OPF_NAMESPACE}
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class TaskBackupMetadata(CalibreTask):
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def __init__(self, task_message=N_('Backing up Metadata')):
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super(TaskBackupMetadata, self).__init__(task_message)
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self.log = logger.create()
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self.db_session = db.CalibreDB(expire_on_commit=False, init=True).session
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def run(self, worker_thread):
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try:
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metadata_backup = self.db_session.query(db.Metadata_Dirtied).all()
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custom_columns = self.db_session.query(db.CustomColumns).all()
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for backup in metadata_backup:
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book = self.db_session.query(db.Books).filter(db.Books.id == backup.book).one_or_none()
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# self.db_session.query(db.Metadata_Dirtied).filter(db.Metadata_Dirtied == backup.id).delete()
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# self.db_session.commit()
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if book:
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metadata_file = self.open_metadata(book, custom_columns)
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self._handleSuccess()
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self.db_session.remove()
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else:
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self.log.error("Book {} not found in database".format(backup.book))
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self._handleError("Book {} not found in database".format(backup.book))
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self.db_session.remove()
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except Exception as ex:
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self.log.debug('Error creating metadata backup: ' + str(ex))
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self._handleError('Error creating metadata backup: ' + str(ex))
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self.db_session.rollback()
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self.db_session.remove()
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def open_metadata(self, book, custom_columns):
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if config.config_use_google_drive:
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if not gdriveutils.is_gdrive_ready():
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raise Exception('Google Drive is configured but not ready')
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web_content_link = gdriveutils.get_metadata_backup_via_gdrive(book.path)
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if not web_content_link:
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raise Exception('Google Drive cover url not found')
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stream = None
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try:
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stream = urlopen(web_content_link)
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except Exception as ex:
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# Bubble exception to calling function
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self.log.debug('Error reading metadata.opf: ' + str(ex)) # ToDo Chek whats going on
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raise ex
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finally:
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if stream is not None:
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stream.close()
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else:
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book_metadata_filepath = os.path.join(config.config_calibre_dir, book.path, 'metadata.opf')
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if not os.path.isfile(book_metadata_filepath):
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self.create_new_metadata_backup(book, custom_columns, book_metadata_filepath)
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# ToDo What to do
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return open(book_metadata_filepath, "w")
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else:
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etree.parse(book_metadata_filepath)
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# backup not found has to be created
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#raise Exception('Book cover file not found')
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def create_new_metadata_backup(self, book, custom_columns, book_metadata_filepath):
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# generate root package element
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package = etree.Element(OPF + "package", nsmap=OPF_NS)
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package.set("unique-identifier", "uuid_id")
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package.set("version", "2.0")
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# generate metadata element and all subelements of it
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metadata = etree.SubElement(package, "metadata", nsmap=NSMAP)
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identifier = etree.SubElement(metadata, PURL + "identifier", id="calibre_id", nsmap=NSMAP)
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identifier.set(OPF + "scheme", "calibre")
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identifier.text = str(book.id)
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identifier2 = etree.SubElement(metadata, PURL + "identifier", id="uuid_id", nsmap=NSMAP)
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identifier2.set(OPF + "scheme", "uuid")
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identifier2.text = book.uuid
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title = etree.SubElement(metadata, PURL + "title", nsmap=NSMAP)
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title.text = book.title
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for author in book.authors:
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creator = etree.SubElement(metadata, PURL + "creator", nsmap=NSMAP)
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creator.text = str(author)
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creator.set(OPF + "file-as", book.author_sort) # ToDo Check
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creator.set(OPF + "role", "aut")
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contributor = etree.SubElement(metadata, PURL + "contributor", nsmap=NSMAP)
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contributor.text = "calibre (5.7.2) [https://calibre-ebook.com]"
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contributor.set(OPF + "file-as", "calibre") # ToDo Check
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contributor.set(OPF + "role", "bpk")
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date = etree.SubElement(metadata, PURL + "date", nsmap=NSMAP)
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date.text = datetime.datetime.strftime(book.pubdate, "%Y-%m-%dT%H:%M:%S+00:00")
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language = etree.SubElement(metadata, PURL + "language", nsmap=NSMAP)
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if book.languages:
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language.text = str(book.languages)
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else:
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language.text = "" # ToDo: insert locale (2 letter code)
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if book.tags:
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subject = etree.SubElement(metadata, PURL + "subject", nsmap=NSMAP)
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subject.text = str(book.tags)
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etree.SubElement(metadata, "meta", name="calibre:author_link_map",
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content="{" + escape(",".join(['"' + str(a) + '":""' for a in book.authors])) + "}",
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nsmap=NSMAP)
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etree.SubElement(metadata, "meta", name="calibre:series",
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content=str(book.series),
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nsmap=NSMAP)
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etree.SubElement(metadata, "meta", name="calibre:series_index",
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content=str(book.series_index),
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nsmap=NSMAP)
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etree.SubElement(metadata, "meta", name="calibre:timestamp",
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content=datetime.datetime.strftime(book.timestamp, "%Y-%m-%dT%H:%M:%S+00:00"),
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nsmap=NSMAP)
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etree.SubElement(metadata, "meta", name="calibre:title_sort",
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content=book.sort,
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nsmap=NSMAP)
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for cc in custom_columns:
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etree.SubElement(metadata, "meta", name="calibre:user_metadata:#{}".format(cc.label),
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content=escape(cc.get_display_dict()),
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nsmap=NSMAP)
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pass
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# generate guide element and all sub elements of it
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guide = etree.SubElement(package, "guide")
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etree.SubElement(guide, "reference", type="cover", title="Titelbild", href="cover.jpg")
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# prepare finalize everything and output
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doc = etree.ElementTree(package)
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with open(book_metadata_filepath, 'wb') as f:
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doc.write(f, xml_declaration=True, encoding='utf-8', pretty_print=True)
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@property
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def name(self):
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return "Backing up Metadata"
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@property
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def is_cancellable(self):
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return True
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