mirror of
https://github.com/janeczku/calibre-web
synced 2024-11-25 19:17:22 +00:00
367 lines
15 KiB
Python
367 lines
15 KiB
Python
|
# -*- 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
|
||
|
|
import os
|
||
|
|
|
||
|
|
from cps import config, db, fs, gdriveutils, logger, ub
|
||
|
|
from cps.services.worker import CalibreTask
|
||
|
|
from datetime import datetime, timedelta
|
||
|
|
from sqlalchemy import func
|
||
|
|
|
||
|
|
try:
|
||
|
|
from urllib.request import urlopen
|
||
|
|
except ImportError as e:
|
||
|
|
from urllib2 import urlopen
|
||
|
|
|
||
|
|
try:
|
||
|
|
from wand.image import Image
|
||
|
|
use_IM = True
|
||
|
|
except (ImportError, RuntimeError) as e:
|
||
|
|
use_IM = False
|
||
|
|
|
||
|
|
THUMBNAIL_RESOLUTION_1X = 1
|
||
|
|
THUMBNAIL_RESOLUTION_2X = 2
|
||
|
|
|
||
|
|
|
||
|
|
class TaskGenerateCoverThumbnails(CalibreTask):
|
||
|
|
def __init__(self, limit=100, task_message=u'Generating cover thumbnails'):
|
||
|
|
super(TaskGenerateCoverThumbnails, self).__init__(task_message)
|
||
|
|
self.limit = limit
|
||
|
|
self.log = logger.create()
|
||
|
|
self.app_db_session = ub.get_new_session_instance()
|
||
|
|
self.calibre_db = db.CalibreDB(expire_on_commit=False)
|
||
|
|
self.cache = fs.FileSystem()
|
||
|
|
self.resolutions = [
|
||
|
|
THUMBNAIL_RESOLUTION_1X,
|
||
|
|
THUMBNAIL_RESOLUTION_2X
|
||
|
|
]
|
||
|
|
|
||
|
|
def run(self, worker_thread):
|
||
|
|
if self.calibre_db.session and use_IM:
|
||
|
|
expired_thumbnails = self.get_expired_thumbnails()
|
||
|
|
thumbnail_book_ids = self.get_thumbnail_book_ids()
|
||
|
|
books_without_thumbnails = self.get_books_without_thumbnails(thumbnail_book_ids)
|
||
|
|
|
||
|
|
count = len(books_without_thumbnails)
|
||
|
|
if count == 0:
|
||
|
|
# Do not display this task on the frontend if there are no covers to update
|
||
|
|
self.self_cleanup = True
|
||
|
|
|
||
|
|
for i, book in enumerate(books_without_thumbnails):
|
||
|
|
for resolution in self.resolutions:
|
||
|
|
expired_thumbnail = self.get_expired_thumbnail_for_book_and_resolution(
|
||
|
|
book,
|
||
|
|
resolution,
|
||
|
|
expired_thumbnails
|
||
|
|
)
|
||
|
|
if expired_thumbnail:
|
||
|
|
self.update_book_thumbnail(book, expired_thumbnail)
|
||
|
|
else:
|
||
|
|
self.create_book_thumbnail(book, resolution)
|
||
|
|
|
||
|
|
self.message = u'Generating cover thumbnail {0} of {1}'.format(i + 1, count)
|
||
|
|
self.progress = (1.0 / count) * i
|
||
|
|
|
||
|
|
self._handleSuccess()
|
||
|
|
self.app_db_session.remove()
|
||
|
|
|
||
|
|
def get_expired_thumbnails(self):
|
||
|
|
return self.app_db_session\
|
||
|
|
.query(ub.Thumbnail)\
|
||
|
|
.filter(ub.Thumbnail.expiration < datetime.utcnow())\
|
||
|
|
.all()
|
||
|
|
|
||
|
|
def get_thumbnail_book_ids(self):
|
||
|
|
return self.app_db_session\
|
||
|
|
.query(ub.Thumbnail.book_id)\
|
||
|
|
.group_by(ub.Thumbnail.book_id)\
|
||
|
|
.having(func.min(ub.Thumbnail.expiration) > datetime.utcnow())\
|
||
|
|
.distinct()
|
||
|
|
|
||
|
|
def get_books_without_thumbnails(self, thumbnail_book_ids):
|
||
|
|
return self.calibre_db.session\
|
||
|
|
.query(db.Books)\
|
||
|
|
.filter(db.Books.has_cover == 1)\
|
||
|
|
.filter(db.Books.id.notin_(thumbnail_book_ids))\
|
||
|
|
.limit(self.limit)\
|
||
|
|
.all()
|
||
|
|
|
||
|
|
def get_expired_thumbnail_for_book_and_resolution(self, book, resolution, expired_thumbnails):
|
||
|
|
for thumbnail in expired_thumbnails:
|
||
|
|
if thumbnail.book_id == book.id and thumbnail.resolution == resolution:
|
||
|
|
return thumbnail
|
||
|
|
|
||
|
|
return None
|
||
|
|
|
||
|
|
def update_book_thumbnail(self, book, thumbnail):
|
||
|
|
thumbnail.generated_at = datetime.utcnow()
|
||
|
|
thumbnail.expiration = datetime.utcnow() + timedelta(days=30)
|
||
|
|
|
||
|
|
try:
|
||
|
|
self.app_db_session.commit()
|
||
|
|
self.generate_book_thumbnail(book, thumbnail)
|
||
|
|
except Exception as ex:
|
||
|
|
self.log.info(u'Error updating book thumbnail: ' + str(ex))
|
||
|
|
self._handleError(u'Error updating book thumbnail: ' + str(ex))
|
||
|
|
self.app_db_session.rollback()
|
||
|
|
|
||
|
|
def create_book_thumbnail(self, book, resolution):
|
||
|
|
thumbnail = ub.Thumbnail()
|
||
|
|
thumbnail.book_id = book.id
|
||
|
|
thumbnail.format = 'jpeg'
|
||
|
|
thumbnail.resolution = resolution
|
||
|
|
|
||
|
|
self.app_db_session.add(thumbnail)
|
||
|
|
try:
|
||
|
|
self.app_db_session.commit()
|
||
|
|
self.generate_book_thumbnail(book, thumbnail)
|
||
|
|
except Exception as ex:
|
||
|
|
self.log.info(u'Error creating book thumbnail: ' + str(ex))
|
||
|
|
self._handleError(u'Error creating book thumbnail: ' + str(ex))
|
||
|
|
self.app_db_session.rollback()
|
||
|
|
|
||
|
|
def generate_book_thumbnail(self, book, thumbnail):
|
||
|
|
if book and thumbnail:
|
||
|
|
if config.config_use_google_drive:
|
||
|
|
if not gdriveutils.is_gdrive_ready():
|
||
|
|
raise Exception('Google Drive is configured but not ready')
|
||
|
|
|
||
|
|
web_content_link = gdriveutils.get_cover_via_gdrive(book.path)
|
||
|
|
if not web_content_link:
|
||
|
|
raise Exception('Google Drive cover url not found')
|
||
|
|
|
||
|
|
stream = None
|
||
|
|
try:
|
||
|
|
stream = urlopen(web_content_link)
|
||
|
|
with Image(file=stream) as img:
|
||
|
|
height = self.get_thumbnail_height(thumbnail)
|
||
|
|
if img.height > height:
|
||
|
|
width = self.get_thumbnail_width(height, img)
|
||
|
|
img.resize(width=width, height=height, filter='lanczos')
|
||
|
|
img.format = thumbnail.format
|
||
|
|
filename = self.cache.get_cache_file_path(thumbnail.filename, fs.CACHE_TYPE_THUMBNAILS)
|
||
|
|
img.save(filename=filename)
|
||
|
|
except Exception as ex:
|
||
|
|
# Bubble exception to calling function
|
||
|
|
self.log.info(u'Error generating thumbnail file: ' + str(ex))
|
||
|
|
raise ex
|
||
|
|
finally:
|
||
|
|
stream.close()
|
||
|
|
else:
|
||
|
|
book_cover_filepath = os.path.join(config.config_calibre_dir, book.path, 'cover.jpg')
|
||
|
|
if not os.path.isfile(book_cover_filepath):
|
||
|
|
raise Exception('Book cover file not found')
|
||
|
|
|
||
|
|
with Image(filename=book_cover_filepath) as img:
|
||
|
|
height = self.get_thumbnail_height(thumbnail)
|
||
|
|
if img.height > height:
|
||
|
|
width = self.get_thumbnail_width(height, img)
|
||
|
|
img.resize(width=width, height=height, filter='lanczos')
|
||
|
|
img.format = thumbnail.format
|
||
|
|
filename = self.cache.get_cache_file_path(thumbnail.filename, fs.CACHE_TYPE_THUMBNAILS)
|
||
|
|
img.save(filename=filename)
|
||
|
|
|
||
|
|
def get_thumbnail_height(self, thumbnail):
|
||
|
|
return int(225 * thumbnail.resolution)
|
||
|
|
|
||
|
|
def get_thumbnail_width(self, height, img):
|
||
|
|
percent = (height / float(img.height))
|
||
|
|
return int((float(img.width) * float(percent)))
|
||
|
|
|
||
|
|
@property
|
||
|
|
def name(self):
|
||
|
|
return "ThumbnailsGenerate"
|
||
|
|
|
||
|
|
|
||
|
|
class TaskSyncCoverThumbnailCache(CalibreTask):
|
||
|
|
def __init__(self, task_message=u'Syncing cover thumbnail cache'):
|
||
|
|
super(TaskSyncCoverThumbnailCache, self).__init__(task_message)
|
||
|
|
self.log = logger.create()
|
||
|
|
self.app_db_session = ub.get_new_session_instance()
|
||
|
|
self.calibre_db = db.CalibreDB(expire_on_commit=False)
|
||
|
|
self.cache = fs.FileSystem()
|
||
|
|
|
||
|
|
def run(self, worker_thread):
|
||
|
|
cached_thumbnail_files = self.cache.list_cache_files(fs.CACHE_TYPE_THUMBNAILS)
|
||
|
|
|
||
|
|
# Expire thumbnails in the database if the cached file is missing
|
||
|
|
# This case will happen if a user deletes the cache dir or cached files
|
||
|
|
if self.app_db_session:
|
||
|
|
self.expire_missing_thumbnails(cached_thumbnail_files)
|
||
|
|
self.progress = 0.25
|
||
|
|
|
||
|
|
# Delete thumbnails in the database if the book has been removed
|
||
|
|
# This case will happen if a book is removed in Calibre and the metadata.db file is updated in the filesystem
|
||
|
|
if self.app_db_session and self.calibre_db:
|
||
|
|
book_ids = self.get_book_ids()
|
||
|
|
self.delete_thumbnails_for_missing_books(book_ids)
|
||
|
|
self.progress = 0.50
|
||
|
|
|
||
|
|
# Expire thumbnails in the database if their corresponding book has been updated since they were generated
|
||
|
|
# This case will happen if the book was updated externally
|
||
|
|
if self.app_db_session and self.cache:
|
||
|
|
books = self.get_books_updated_in_the_last_day()
|
||
|
|
book_ids = list(map(lambda b: b.id, books))
|
||
|
|
thumbnails = self.get_thumbnails_for_updated_books(book_ids)
|
||
|
|
self.expire_thumbnails_for_updated_book(books, thumbnails)
|
||
|
|
self.progress = 0.75
|
||
|
|
|
||
|
|
# Delete extraneous cached thumbnail files
|
||
|
|
# This case will happen if a book was deleted and the thumbnail OR the metadata.db file was changed externally
|
||
|
|
if self.app_db_session:
|
||
|
|
db_thumbnail_files = self.get_thumbnail_filenames()
|
||
|
|
self.delete_extraneous_thumbnail_files(cached_thumbnail_files, db_thumbnail_files)
|
||
|
|
|
||
|
|
self._handleSuccess()
|
||
|
|
self.app_db_session.remove()
|
||
|
|
|
||
|
|
def expire_missing_thumbnails(self, filenames):
|
||
|
|
try:
|
||
|
|
self.app_db_session\
|
||
|
|
.query(ub.Thumbnail)\
|
||
|
|
.filter(ub.Thumbnail.filename.notin_(filenames))\
|
||
|
|
.update({"expiration": datetime.utcnow()}, synchronize_session=False)
|
||
|
|
self.app_db_session.commit()
|
||
|
|
except Exception as ex:
|
||
|
|
self.log.info(u'Error expiring thumbnails for missing cache files: ' + str(ex))
|
||
|
|
self._handleError(u'Error expiring thumbnails for missing cache files: ' + str(ex))
|
||
|
|
self.app_db_session.rollback()
|
||
|
|
|
||
|
|
def get_book_ids(self):
|
||
|
|
results = self.calibre_db.session\
|
||
|
|
.query(db.Books.id)\
|
||
|
|
.filter(db.Books.has_cover == 1)\
|
||
|
|
.distinct()
|
||
|
|
|
||
|
|
return [value for value, in results]
|
||
|
|
|
||
|
|
def delete_thumbnails_for_missing_books(self, book_ids):
|
||
|
|
try:
|
||
|
|
self.app_db_session\
|
||
|
|
.query(ub.Thumbnail)\
|
||
|
|
.filter(ub.Thumbnail.book_id.notin_(book_ids))\
|
||
|
|
.delete(synchronize_session=False)
|
||
|
|
self.app_db_session.commit()
|
||
|
|
except Exception as ex:
|
||
|
|
self.log.info(str(ex))
|
||
|
|
self._handleError(u'Error deleting thumbnails for missing books: ' + str(ex))
|
||
|
|
self.app_db_session.rollback()
|
||
|
|
|
||
|
|
def get_thumbnail_filenames(self):
|
||
|
|
results = self.app_db_session\
|
||
|
|
.query(ub.Thumbnail.filename)\
|
||
|
|
.all()
|
||
|
|
|
||
|
|
return [thumbnail for thumbnail, in results]
|
||
|
|
|
||
|
|
def delete_extraneous_thumbnail_files(self, cached_thumbnail_files, db_thumbnail_files):
|
||
|
|
extraneous_files = list(set(cached_thumbnail_files).difference(db_thumbnail_files))
|
||
|
|
for file in extraneous_files:
|
||
|
|
self.cache.delete_cache_file(file, fs.CACHE_TYPE_THUMBNAILS)
|
||
|
|
|
||
|
|
def get_books_updated_in_the_last_day(self):
|
||
|
|
return self.calibre_db.session\
|
||
|
|
.query(db.Books)\
|
||
|
|
.filter(db.Books.has_cover == 1)\
|
||
|
|
.filter(db.Books.last_modified > datetime.utcnow() - timedelta(days=1, hours=1))\
|
||
|
|
.all()
|
||
|
|
|
||
|
|
def get_thumbnails_for_updated_books(self, book_ids):
|
||
|
|
return self.app_db_session\
|
||
|
|
.query(ub.Thumbnail)\
|
||
|
|
.filter(ub.Thumbnail.book_id.in_(book_ids))\
|
||
|
|
.all()
|
||
|
|
|
||
|
|
def expire_thumbnails_for_updated_book(self, books, thumbnails):
|
||
|
|
thumbnail_ids = list()
|
||
|
|
for book in books:
|
||
|
|
for thumbnail in thumbnails:
|
||
|
|
if thumbnail.book_id == book.id and thumbnail.generated_at < book.last_modified:
|
||
|
|
thumbnail_ids.append(thumbnail.id)
|
||
|
|
|
||
|
|
try:
|
||
|
|
self.app_db_session\
|
||
|
|
.query(ub.Thumbnail)\
|
||
|
|
.filter(ub.Thumbnail.id.in_(thumbnail_ids)) \
|
||
|
|
.update({"expiration": datetime.utcnow()}, synchronize_session=False)
|
||
|
|
self.app_db_session.commit()
|
||
|
|
except Exception as ex:
|
||
|
|
self.log.info(u'Error expiring thumbnails for updated books: ' + str(ex))
|
||
|
|
self._handleError(u'Error expiring thumbnails for updated books: ' + str(ex))
|
||
|
|
self.app_db_session.rollback()
|
||
|
|
|
||
|
|
@property
|
||
|
|
def name(self):
|
||
|
|
return "ThumbnailsSync"
|
||
|
|
|
||
|
|
|
||
|
|
class TaskClearCoverThumbnailCache(CalibreTask):
|
||
|
|
def __init__(self, book_id=None, task_message=u'Clearing cover thumbnail cache'):
|
||
|
|
super(TaskClearCoverThumbnailCache, self).__init__(task_message)
|
||
|
|
self.log = logger.create()
|
||
|
|
self.book_id = book_id
|
||
|
|
self.app_db_session = ub.get_new_session_instance()
|
||
|
|
self.cache = fs.FileSystem()
|
||
|
|
|
||
|
|
def run(self, worker_thread):
|
||
|
|
if self.app_db_session:
|
||
|
|
if self.book_id:
|
||
|
|
thumbnails = self.get_thumbnails_for_book(self.book_id)
|
||
|
|
for thumbnail in thumbnails:
|
||
|
|
self.expire_and_delete_thumbnail(thumbnail)
|
||
|
|
else:
|
||
|
|
self.expire_and_delete_all_thumbnails()
|
||
|
|
|
||
|
|
self._handleSuccess()
|
||
|
|
self.app_db_session.remove()
|
||
|
|
|
||
|
|
def get_thumbnails_for_book(self, book_id):
|
||
|
|
return self.app_db_session\
|
||
|
|
.query(ub.Thumbnail)\
|
||
|
|
.filter(ub.Thumbnail.book_id == book_id)\
|
||
|
|
.all()
|
||
|
|
|
||
|
|
def expire_and_delete_thumbnail(self, thumbnail):
|
||
|
|
thumbnail.expiration = datetime.utcnow()
|
||
|
|
|
||
|
|
try:
|
||
|
|
self.app_db_session.commit()
|
||
|
|
self.cache.delete_cache_file(thumbnail.filename, fs.CACHE_TYPE_THUMBNAILS)
|
||
|
|
except Exception as ex:
|
||
|
|
self.log.info(u'Error expiring book thumbnail: ' + str(ex))
|
||
|
|
self._handleError(u'Error expiring book thumbnail: ' + str(ex))
|
||
|
|
self.app_db_session.rollback()
|
||
|
|
|
||
|
|
def expire_and_delete_all_thumbnails(self):
|
||
|
|
self.app_db_session\
|
||
|
|
.query(ub.Thumbnail)\
|
||
|
|
.update({'expiration': datetime.utcnow()})
|
||
|
|
|
||
|
|
try:
|
||
|
|
self.app_db_session.commit()
|
||
|
|
self.cache.delete_cache_dir(fs.CACHE_TYPE_THUMBNAILS)
|
||
|
|
except Exception as ex:
|
||
|
|
self.log.info(u'Error expiring book thumbnails: ' + str(ex))
|
||
|
|
self._handleError(u'Error expiring book thumbnails: ' + str(ex))
|
||
|
|
self.app_db_session.rollback()
|
||
|
|
|
||
|
|
@property
|
||
|
|
def name(self):
|
||
|
|
return "ThumbnailsClear"
|