60 lines
1.9 KiB
Python
60 lines
1.9 KiB
Python
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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 mmonkey
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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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from __future__ import division, print_function, unicode_literals
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import os
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from . import logger, ub
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from .constants import CACHE_DIR as _CACHE_DIR
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from .services.worker import WorkerThread
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from .tasks.thumbnail import TaskThumbnail
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from datetime import datetime
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THUMBNAIL_RESOLUTION_1X = 1.0
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THUMBNAIL_RESOLUTION_2X = 2.0
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log = logger.create()
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def get_thumbnail_cache_dir():
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if not os.path.isdir(_CACHE_DIR):
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os.makedirs(_CACHE_DIR)
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if not os.path.isdir(os.path.join(_CACHE_DIR, 'thumbnails')):
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os.makedirs(os.path.join(_CACHE_DIR, 'thumbnails'))
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return os.path.join(_CACHE_DIR, 'thumbnails')
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def get_thumbnail_cache_path(thumbnail):
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if thumbnail:
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return os.path.join(get_thumbnail_cache_dir(), thumbnail.filename)
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return None
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def cover_thumbnail_exists_for_book(book):
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if book and book.has_cover:
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thumbnail = ub.session.query(ub.Thumbnail).filter(ub.Thumbnail.book_id == book.id).first()
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if thumbnail and thumbnail.expiration > datetime.utcnow():
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thumbnail_path = get_thumbnail_cache_path(thumbnail)
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return thumbnail_path and os.path.isfile(thumbnail_path)
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return False
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