130 lines
4.7 KiB
Python
130 lines
4.7 KiB
Python
# This file is a part of Lector, a Qt based ebook reader
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# Copyright (C) 2017-2019 BasioMeusPuga
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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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# 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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# 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 os
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import base64
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import zipfile
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import logging
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from bs4 import BeautifulSoup
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logger = logging.getLogger(__name__)
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class FB2:
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def __init__(self, filename):
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self.filename = filename
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self.zip_file = None
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self.book = {}
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self.xml = None
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def read_fb2(self):
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try:
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if self.filename.endswith('.fb2.zip'):
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this_book = zipfile.ZipFile(
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self.filename, mode='r', allowZip64=True)
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for i in this_book.filelist:
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if os.path.splitext(i.filename)[1] == '.fb2':
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book_text = this_book.read(i.filename)
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break
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else:
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with open(self.filename, 'r') as book_file:
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book_text = book_file.read()
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self.xml = BeautifulSoup(book_text, 'lxml')
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self.generate_book_metadata()
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except: # Not specifying an exception type here may be justified
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return False
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return True
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def generate_book_metadata(self):
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self.book['isbn'] = None
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self.book['tags'] = None
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self.book['book_list'] = []
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# All metadata can be parsed in one pass
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all_tags = self.xml.find('description')
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self.book['title'] = all_tags.find('book-title').text
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if self.book['title'] == '' or self.book['title'] is None:
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self.book['title'] = os.path.splitext(
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os.path.basename(self.filename))[0]
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self.book['author'] = all_tags.find(
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'author').getText(separator=' ').replace('\n', ' ')
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if self.book['author'] == '' or self.book['author'] is None:
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self.book['author'] = 'Unknown'
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# TODO
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# Account for other date formats
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try:
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self.book['year'] = int(all_tags.find('date').text)
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except ValueError:
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self.book['year'] = 9999
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# Cover Image
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try:
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cover_image_xml = self.xml.find('coverpage')
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for i in cover_image_xml:
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cover_image_name = i.get('l:href')
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cover_image_data = self.xml.find_all('binary')
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for i in cover_image_data:
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if cover_image_name.endswith(i.get('id')):
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self.book['cover'] = base64.decodebytes(i.text.encode())
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except (AttributeError, TypeError):
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# Catch TypeError in case no images exist in the book
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logger.error('No cover found for: ' + self.filename)
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self.book['cover'] = None
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def parse_chapters(self, temp_dir):
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# There's no need to parse the TOC separately because
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# everything is linear
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for i in self.xml.find_all('section'):
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this_title = '<No title>'
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for j in i:
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if j.name == 'title':
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this_title = j.getText(separator=' ')
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self.book['book_list'].append(
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[this_title, str(i)])
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# Extract all images to the temp_dir
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for i in self.xml.find_all('binary'):
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image_name = i.get('id')
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image_path = os.path.join(temp_dir, image_name)
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image_string = f'<image l:href="#{image_name}"'
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replacement_string = f'<img src=\"{image_path}\"'
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for j in self.book['book_list']:
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j[1] = j[1].replace(
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image_string, replacement_string)
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try:
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image_data = base64.decodebytes(i.text.encode())
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with open(image_path, 'wb') as outimage:
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outimage.write(image_data)
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except AttributeError:
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pass
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# Insert the book cover at the beginning
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if self.book['cover']:
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cover_path = os.path.join(temp_dir, 'cover')
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with open(cover_path, 'wb') as outimage:
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outimage.write(self.book['cover'])
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self.book['book_list'].insert(
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0, ('Cover', f'<center><img src="{cover_path}" alt="Cover"></center>'))
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