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 from picture.models import Picture
  16
  17
  18 class Command(BaseCommand):
  19     option_list = BaseCommand.option_list + (
  20         make_option('-q', '--quiet', action='store_false', dest='verbose', default=True,
  21             help='Verbosity level; 0=minimal output, 1=normal output, 2=all output'),
  22         make_option('-f', '--force', action='store_true', dest='force', default=False,
  23             help='Print status messages to stdout'),
  24         make_option('-E', '--no-build-epub', action='store_false', dest='build_epub', default=True,
  25             help='Don\'t build EPUB file'),
  26         make_option('-M', '--no-build-mobi', action='store_false', dest='build_mobi', default=True,
  27             help='Don\'t build MOBI file'),
  28         make_option('-T', '--no-build-txt', action='store_false', dest='build_txt', default=True,
  29             help='Don\'t build TXT file'),
  30         make_option('-P', '--no-build-pdf', action='store_false', dest='build_pdf', default=True,
  31             help='Don\'t build PDF file'),
  32         make_option('-w', '--wait-until', dest='wait_until', metavar='TIME',
  33             help='Wait until specified time (Y-M-D h:m:s)'),
  34         make_option('-p', '--picture', action='store_true', dest='import_picture', default=False,
  35             help='Import pictures'),
  36
  37     )
  38     help = 'Imports books from the specified directories.'
  39     args = 'directory [directory ...]'
  40
  41     def import_book(self, file_path, options):
  42         verbose = options.get('verbose')
  43         file_base, ext = os.path.splitext(file_path)
  44         book = Book.from_xml_file(file_path, overwrite=options.get('force'),
  45                                   build_epub=options.get('build_epub'),
  46                                   build_txt=options.get('build_txt'),
  47                                   build_pdf=options.get('build_pdf'),
  48                                   build_mobi=options.get('build_mobi'))
  49         for ebook_format in Book.ebook_formats:
  50             if os.path.isfile(file_base + '.' + ebook_format):
  51                 getattr(book, '%s_file' % ebook_format).save(
  52                     '%s.%s' % (book.slug, ebook_format),
  53                     File(file(file_base + '.' + ebook_format)))
  54                 if verbose:
  55                     print "Importing %s.%s" % (file_base, ebook_format)
  56
  57         book.save()
  58
  59     def import_picture(self, file_path, options):
  60         picture = Picture.from_xml_file(file_path, overwrite=options.get('force'))
  61         return picture
  62
  63     def handle(self, *directories, **options):
  64         from django.db import transaction
  65
  66         self.style = color_style()
  67
  68         verbose = options.get('verbose')
  69         force = options.get('force')
  70         show_traceback = options.get('traceback', False)
  71         import_picture = options.get('import_picture')
  72
  73         wait_until = None
  74         if options.get('wait_until'):
  75             wait_until = time.mktime(time.strptime(options.get('wait_until'), '%Y-%m-%d %H:%M:%S'))
  76             if verbose > 0:
  77                 print "Will wait until %s; it's %f seconds from now" % (
  78                     time.strftime('%Y-%m-%d %H:%M:%S',
  79                     time.localtime(wait_until)), wait_until - time.time())
  80
  81         # Start transaction management.
  82         transaction.commit_unless_managed()
  83         transaction.enter_transaction_management()
  84         transaction.managed(True)
  85
  86         files_imported = 0
  87         files_skipped = 0
  88
  89         for dir_name in directories:
  90             if not os.path.isdir(dir_name):
  91                 print self.style.ERROR("%s: Not a directory. Skipping." % dir_name)
  92             else:
  93                 # files queue
  94                 files = sorted(os.listdir(dir_name))
  95                 postponed = {}
  96                 while files:
  97                     file_name = files.pop(0)
  98                     file_path = os.path.join(dir_name, file_name)
  99                     file_base, ext = os.path.splitext(file_path)
 100
 101                     # Skip files that are not XML files
 102                     if not ext == '.xml':
 103                         continue
 104
 105                     if verbose > 0:
 106                         print "Parsing '%s'" % file_path
 107                     else:
 108                         sys.stdout.write('.')
 109                         sys.stdout.flush()
 110
 111                     # Import book files
 112                     try:
 113                         if import_picture:
 114                             self.import_picture(file_path, options)
 115                         else:
 116                             self.import_book(file_path, options)
 117                         files_imported += 1
 118
 119                     except (Book.AlreadyExists, Picture.AlreadyExists):
 120                         print self.style.ERROR('%s: Book or Picture already imported. Skipping. To overwrite use --force.' %
 121                             file_path)
 122                         files_skipped += 1
 123
 124                     except Book.DoesNotExist, e:
 125                         if file_name not in postponed or postponed[file_name] < files_imported:
 126                             # push it back into the queue, maybe the missing child will show up
 127                             if verbose:
 128                                 print self.style.NOTICE('Waiting for missing children')
 129                             files.append(file_name)
 130                             postponed[file_name] = files_imported
 131                         else:
 132                             # we're in a loop, nothing's being imported - some child is really missing
 133                             raise e
 134
 135         # Print results
 136         print
 137         print "Results: %d files imported, %d skipped, %d total." % (
 138             files_imported, files_skipped, files_imported + files_skipped)
 139         print
 140
 141         if wait_until:
 142             print 'Waiting...'
 143             try:
 144                 time.sleep(wait_until - time.time())
 145             except IOError:
 146                 print "it's already too late"
 147
 148         transaction.commit()
 149         transaction.leave_transaction_management()
 150