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