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