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