apps/catalogue/management/commands/importbooks.py

   1 # -*- coding: utf-8 -*-
   2 # This file is part of Wolnelektury, licensed under GNU Affero GPLv3 or later.
   3 # Copyright © Fundacja Nowoczesna Polska. See NOTICE for more information.
   4 #
   5 import os
   6 import sys
   7 import time
   8 from optparse import make_option
   9
  10 from django.core.management.base import BaseCommand
  11 from django.core.management.color import color_style
  12 from django.core.files import File
  13
  14 from catalogue.models import Book
  15
  16
  17 class Command(BaseCommand):
  18     option_list = BaseCommand.option_list + (
  19         make_option('-q', '--quiet', action='store_false', dest='verbose', default=True,
  20             help='Verbosity level; 0=minimal output, 1=normal output, 2=all output'),
  21         make_option('-f', '--force', action='store_true', dest='force', default=False,
  22             help='Print status messages to stdout'),
  23         make_option('-E', '--no-build-epub', action='store_false', dest='build_epub', default=True,
  24             help='Don\'t build EPUB file'),
  25         make_option('-M', '--no-build-mobi', action='store_false', dest='build_mobi', default=True,
  26             help='Don\'t build MOBI file'),
  27         make_option('-T', '--no-build-txt', action='store_false', dest='build_txt', default=True,
  28             help='Don\'t build TXT file'),
  29         make_option('-P', '--no-build-pdf', action='store_false', dest='build_pdf', default=True,
  30             help='Don\'t build PDF file'),
  31         make_option('-w', '--wait-until', dest='wait_until', metavar='TIME',
  32             help='Wait until specified time (Y-M-D h:m:s)'),
  33     )
  34     help = 'Imports books from the specified directories.'
  35     args = 'directory [directory ...]'
  36
  37     def handle(self, *directories, **options):
  38         from django.db import transaction
  39
  40         self.style = color_style()
  41
  42         verbose = options.get('verbose')
  43         force = options.get('force')
  44         show_traceback = options.get('traceback', False)
  45
  46         wait_until = None
  47         if options.get('wait_until'):
  48             wait_until = time.mktime(time.strptime(options.get('wait_until'), '%Y-%m-%d %H:%M:%S'))
  49             if verbose > 0:
  50                 print "Will wait until %s; it's %f seconds from now" % (
  51                     time.strftime('%Y-%m-%d %H:%M:%S',
  52                     time.localtime(wait_until)), wait_until - time.time())
  53
  54         # Start transaction management.
  55         transaction.commit_unless_managed()
  56         transaction.enter_transaction_management()
  57         transaction.managed(True)
  58
  59         files_imported = 0
  60         files_skipped = 0
  61
  62         for dir_name in directories:
  63             if not os.path.isdir(dir_name):
  64                 print self.style.ERROR("%s: Not a directory. Skipping." % dir_name)
  65             else:
  66                 # files queue
  67                 files = sorted(os.listdir(dir_name))
  68                 postponed = {}
  69                 while files:
  70                     file_name = files.pop(0)
  71                     file_path = os.path.join(dir_name, file_name)
  72                     file_base, ext = os.path.splitext(file_path)
  73
  74                     # Skip files that are not XML files
  75                     if not ext == '.xml':
  76                         continue
  77
  78                     if verbose > 0:
  79                         print "Parsing '%s'" % file_path
  80                     else:
  81                         sys.stdout.write('.')
  82                         sys.stdout.flush()
  83
  84                     # Import book files
  85                     try:
  86                         book = Book.from_xml_file(file_path, overwrite=force,
  87                                                   build_epub=options.get('build_epub'),
  88                                                   build_txt=options.get('build_txt'),
  89                                                   build_pdf=options.get('build_pdf'),
  90                                                   build_mobi=options.get('build_mobi'))
  91                         files_imported += 1
  92
  93                         for ebook_format in Book.ebook_formats:
  94                             if os.path.isfile(file_base + '.' + ebook_format):
  95                                 getattr(book, '%s_file' % ebook_format).save(
  96                                     '%s.%s' % (book.slug, ebook_format),
  97                                     File(file(file_base + '.' + ebook_format)))
  98                                 if verbose:
  99                                     print "Importing %s.%s" % (file_base, ebook_format)
 100
 101                         book.save()
 102
 103                     except Book.AlreadyExists, msg:
 104                         print self.style.ERROR('%s: Book already imported. Skipping. To overwrite use --force.' %
 105                             file_path)
 106                         files_skipped += 1
 107
 108                     except Book.DoesNotExist, e:
 109                         if file_name not in postponed or postponed[file_name] < files_imported:
 110                             # push it back into the queue, maybe the missing child will show up
 111                             if verbose:
 112                                 print self.style.NOTICE('Waiting for missing children')
 113                             files.append(file_name)
 114                             postponed[file_name] = files_imported
 115                         else:
 116                             # we're in a loop, nothing's being imported - some child is really missing
 117                             raise e
 118
 119         # Print results
 120         print
 121         print "Results: %d files imported, %d skipped, %d total." % (
 122             files_imported, files_skipped, files_imported + files_skipped)
 123         print
 124
 125         if wait_until:
 126             print 'Waiting...'
 127             try:
 128                 time.sleep(wait_until - time.time())
 129             except IOError:
 130                 print "it's already too late"
 131
 132         transaction.commit()
 133         transaction.leave_transaction_management()
 134