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('-S', '--no-search-index', action='store_false', dest='search_index', default=True,
  33             help='Don\'t build PDF file'),
  34         make_option('-w', '--wait-until', dest='wait_until', metavar='TIME',
  35             help='Wait until specified time (Y-M-D h:m:s)'),
  36         make_option('-p', '--picture', action='store_true', dest='import_picture', default=False,
  37             help='Import pictures'),
  38     )
  39     help = 'Imports books from the specified directories.'
  40     args = 'directory [directory ...]'
  41
  42     def import_book(self, file_path, options):
  43         verbose = options.get('verbose')
  44         file_base, ext = os.path.splitext(file_path)
  45         book = Book.from_xml_file(file_path, overwrite=options.get('force'),
  46                                                     build_epub=options.get('build_epub'),
  47                                                     build_txt=options.get('build_txt'),
  48                                                     build_pdf=options.get('build_pdf'),
  49                                                     build_mobi=options.get('build_mobi'),
  50                                                     search_index=options.get('search_index'))
  51         fileid = book.fileid()
  52         for ebook_format in Book.ebook_formats:
  53             if os.path.isfile(file_base + '.' + ebook_format):
  54                 getattr(book, '%s_file' % ebook_format).save(
  55                     '%s.%s' % (fileid, ebook_format),
  56                     File(file(file_base + '.' + ebook_format)))
  57                 if verbose:
  58                     print "Importing %s.%s" % (file_base, ebook_format)
  59
  60         book.save()
  61
  62     def import_picture(self, file_path, options):
  63         picture = Picture.from_xml_file(file_path, overwrite=options.get('force'))
  64         return picture
  65
  66     def handle(self, *directories, **options):
  67         from django.db import transaction
  68
  69         self.style = color_style()
  70
  71         verbose = options.get('verbose')
  72         force = options.get('force')
  73         show_traceback = options.get('traceback', False)
  74         import_picture = options.get('import_picture')
  75
  76         wait_until = None
  77         if options.get('wait_until'):
  78             wait_until = time.mktime(time.strptime(options.get('wait_until'), '%Y-%m-%d %H:%M:%S'))
  79             if verbose > 0:
  80                 print "Will wait until %s; it's %f seconds from now" % (
  81                     time.strftime('%Y-%m-%d %H:%M:%S',
  82                     time.localtime(wait_until)), wait_until - time.time())
  83
  84         # Start transaction management.
  85         transaction.commit_unless_managed()
  86         transaction.enter_transaction_management()
  87         transaction.managed(True)
  88
  89         files_imported = 0
  90         files_skipped = 0
  91
  92         for dir_name in directories:
  93             if not os.path.isdir(dir_name):
  94                 print self.style.ERROR("%s: Not a directory. Skipping." % dir_name)
  95             else:
  96                 # files queue
  97                 files = sorted(os.listdir(dir_name))
  98                 postponed = {}
  99                 while files:
 100                     file_name = files.pop(0)
 101                     file_path = os.path.join(dir_name, file_name)
 102                     file_base, ext = os.path.splitext(file_path)
 103
 104                     # Skip files that are not XML files
 105                     if not ext == '.xml':
 106                         continue
 107
 108                     if verbose > 0:
 109                         print "Parsing '%s'" % file_path
 110                     else:
 111                         sys.stdout.write('.')
 112                         sys.stdout.flush()
 113
 114                     # Import book files
 115                     try:
 116                         if import_picture:
 117                             self.import_picture(file_path, options)
 118                         else:
 119                             self.import_book(file_path, options)
 120                         files_imported += 1
 121
 122                     except (Book.AlreadyExists, Picture.AlreadyExists):
 123                         print self.style.ERROR('%s: Book or Picture already imported. Skipping. To overwrite use --force.' %
 124                             file_path)
 125                         files_skipped += 1
 126
 127                     except Book.DoesNotExist, e:
 128                         if file_name not in postponed or postponed[file_name] < files_imported:
 129                             # push it back into the queue, maybe the missing child will show up
 130                             if verbose:
 131                                 print self.style.NOTICE('Waiting for missing children')
 132                             files.append(file_name)
 133                             postponed[file_name] = files_imported
 134                         else:
 135                             # we're in a loop, nothing's being imported - some child is really missing
 136                             raise e
 137
 138         # Print results
 139         print
 140         print "Results: %d files imported, %d skipped, %d total." % (
 141             files_imported, files_skipped, files_imported + files_skipped)
 142         print
 143
 144         if wait_until:
 145             print 'Waiting...'
 146             try:
 147                 time.sleep(wait_until - time.time())
 148             except IOError:
 149                 print "it's already too late"
 150
 151         transaction.commit()
 152         transaction.leave_transaction_management()
 153