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199 lines
8.6 KiB
Python
199 lines
8.6 KiB
Python
from __future__ import division, print_function, unicode_literals
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import sys
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import os
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import re
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from glob import glob
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from shutil import copyfile
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from sqlalchemy.exc import SQLAlchemyError
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from cps.services.worker import CalibreTask, STAT_FINISH_SUCCESS
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from cps import calibre_db, db
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from cps import logger, config
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from cps.subproc_wrapper import process_open
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from flask_babel import gettext as _
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from cps.tasks.mail import TaskEmail
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from cps import gdriveutils
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log = logger.create()
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class TaskConvert(CalibreTask):
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def __init__(self, file_path, bookid, taskMessage, settings, kindle_mail):
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super(TaskConvert, self).__init__(taskMessage)
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self.file_path = file_path
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self.bookid = bookid
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self.settings = settings
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self.kindle_mail = kindle_mail
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self.results = dict()
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def run(self, worker_thread):
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self.worker_thread = worker_thread
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filename = self._convert_ebook_format()
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if filename:
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if config.config_use_google_drive:
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gdriveutils.updateGdriveCalibreFromLocal()
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if self.kindle_mail:
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# if we're sending to kindle after converting, create a one-off task and run it immediately
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# todo: figure out how to incorporate this into the progress
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try:
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task = TaskEmail(self.settings['subject'], self.results["path"],
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filename, self.settings, self.kindle_mail,
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self.settings['subject'], self.settings['body'], internal=True)
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task.start(worker_thread)
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# even though the convert task might be finished, if this task fails, fail the whole thing
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if task.stat != STAT_FINISH_SUCCESS:
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raise Exception(task.error)
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except Exception as e:
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return self._handleError(str(e))
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def _convert_ebook_format(self):
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error_message = None
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local_session = db.Session()
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file_path = self.file_path
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book_id = self.bookid
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format_old_ext = u'.' + self.settings['old_book_format'].lower()
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format_new_ext = u'.' + self.settings['new_book_format'].lower()
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# check to see if destination format already exists -
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# if it does - mark the conversion task as complete and return a success
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# this will allow send to kindle workflow to continue to work
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if os.path.isfile(file_path + format_new_ext):
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log.info("Book id %d already converted to %s", book_id, format_new_ext)
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cur_book = calibre_db.get_book(book_id)
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self.results['path'] = file_path
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self.results['title'] = cur_book.title
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self._handleSuccess()
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return file_path + format_new_ext
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else:
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log.info("Book id %d - target format of %s does not exist. Moving forward with convert.",
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book_id,
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format_new_ext)
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if config.config_kepubifypath and format_old_ext == '.epub' and format_new_ext == '.kepub':
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check, error_message = self._convert_kepubify(file_path,
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format_old_ext,
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format_new_ext)
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else:
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# check if calibre converter-executable is existing
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if not os.path.exists(config.config_converterpath):
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# ToDo Text is not translated
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self._handleError(_(u"Calibre ebook-convert %(tool)s not found", tool=config.config_converterpath))
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return
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check, error_message = self._convert_calibre(file_path, format_old_ext, format_new_ext)
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if check == 0:
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cur_book = calibre_db.get_book(book_id)
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if os.path.isfile(file_path + format_new_ext):
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# self.db_queue.join()
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new_format = db.Data(name=cur_book.data[0].name,
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book_format=self.settings['new_book_format'].upper(),
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book=book_id, uncompressed_size=os.path.getsize(file_path + format_new_ext))
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try:
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local_session.merge(new_format)
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local_session.commit()
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except SQLAlchemyError as e:
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local_session.rollback()
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log.error("Database error: %s", e)
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return
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self.results['path'] = cur_book.path
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self.results['title'] = cur_book.title
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if config.config_use_google_drive:
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os.remove(file_path + format_old_ext)
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self._handleSuccess()
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return file_path + format_new_ext
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else:
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error_message = _('%(format)s format not found on disk', format=format_new_ext.upper())
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log.info("ebook converter failed with error while converting book")
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if not error_message:
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error_message = _('Ebook converter failed with unknown error')
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self._handleError(error_message)
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return
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def _convert_kepubify(self, file_path, format_old_ext, format_new_ext):
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quotes = [1, 3]
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command = [config.config_kepubifypath, (file_path + format_old_ext), '-o', os.path.dirname(file_path)]
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try:
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p = process_open(command, quotes)
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except OSError as e:
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return 1, _(u"Kepubify-converter failed: %(error)s", error=e)
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self.progress = 0.01
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while True:
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nextline = p.stdout.readlines()
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nextline = [x.strip('\n') for x in nextline if x != '\n']
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if sys.version_info < (3, 0):
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nextline = [x.decode('utf-8') for x in nextline]
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for line in nextline:
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log.debug(line)
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if p.poll() is not None:
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break
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# ToD Handle
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# process returncode
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check = p.returncode
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# move file
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if check == 0:
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converted_file = glob(os.path.join(os.path.dirname(file_path), "*.kepub.epub"))
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if len(converted_file) == 1:
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copyfile(converted_file[0], (file_path + format_new_ext))
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os.unlink(converted_file[0])
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else:
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return 1, _(u"Converted file not found or more than one file in folder %(folder)s",
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folder=os.path.dirname(file_path))
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return check, None
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def _convert_calibre(self, file_path, format_old_ext, format_new_ext):
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try:
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# Linux py2.7 encode as list without quotes no empty element for parameters
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# linux py3.x no encode and as list without quotes no empty element for parameters
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# windows py2.7 encode as string with quotes empty element for parameters is okay
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# windows py 3.x no encode and as string with quotes empty element for parameters is okay
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# separate handling for windows and linux
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quotes = [1, 2]
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command = [config.config_converterpath, (file_path + format_old_ext),
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(file_path + format_new_ext)]
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quotes_index = 3
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if config.config_calibre:
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parameters = config.config_calibre.split(" ")
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for param in parameters:
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command.append(param)
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quotes.append(quotes_index)
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quotes_index += 1
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p = process_open(command, quotes)
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except OSError as e:
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return 1, _(u"Ebook-converter failed: %(error)s", error=e)
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while p.poll() is None:
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nextline = p.stdout.readline()
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if os.name == 'nt' and sys.version_info < (3, 0):
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nextline = nextline.decode('windows-1252')
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elif os.name == 'posix' and sys.version_info < (3, 0):
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nextline = nextline.decode('utf-8')
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log.debug(nextline.strip('\r\n'))
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# parse progress string from calibre-converter
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progress = re.search(r"(\d+)%\s.*", nextline)
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if progress:
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self.progress = int(progress.group(1)) / 100
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# process returncode
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check = p.returncode
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calibre_traceback = p.stderr.readlines()
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error_message = ""
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for ele in calibre_traceback:
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if sys.version_info < (3, 0):
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ele = ele.decode('utf-8')
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log.debug(ele.strip('\n'))
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if not ele.startswith('Traceback') and not ele.startswith(' File'):
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error_message = _("Calibre failed with error: %(error)s", error=ele.strip('\n'))
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return check, error_message
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@property
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def name(self):
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return "Convert"
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