apps/catalogue/management/commands/savemedia.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.path
   6
   7 from django.core.management.base import BaseCommand
   8
   9 from catalogue.models import Book, BookMedia
  10 from catalogue.utils import ExistingFile
  11
  12
  13 class Command(BaseCommand):
  14     help = "Saves uploaded media with a given book and a given name. If media has a source SHA1 info - matching media is replaced."
  15     args = 'path slug name'
  16
  17     def handle(self, *args, **options):
  18         from django.db import transaction
  19
  20         path, slug, name = args
  21
  22         # Start transaction management.
  23         transaction.commit_unless_managed()
  24         transaction.enter_transaction_management()
  25         transaction.managed(True)
  26
  27         book = Book.objects.get(slug=slug)
  28
  29         root, ext = os.path.splitext(path)
  30         ext = ext.lower()
  31         if ext:
  32             ext = ext[1:]
  33             if ext == 'zip':
  34                 ext = 'daisy'
  35
  36         source_sha1 = BookMedia.read_source_sha1(path, ext)
  37         print "Source file SHA1:", source_sha1
  38         try:
  39             assert source_sha1
  40             bm = book.media.get(type=ext, source_sha1=source_sha1)
  41             print "Replacing media: %s (%s)" % (bm.name.encode('utf-8'), ext)
  42         except (AssertionError, BookMedia.DoesNotExist):
  43             bm = BookMedia(book=book, type=ext)
  44             print "Creating new media"
  45         bm.name = name
  46         bm.file.save(None, ExistingFile(path))
  47         bm.save()
  48         transaction.commit()
  49         transaction.leave_transaction_management()