apps/catalogue/management/commands/pack.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 from optparse import make_option
   6
   7 from django.core.management.base import BaseCommand
   8 from django.core.management.color import color_style
   9 import zipfile
  10
  11 from catalogue.models import Book, Tag
  12
  13
  14 class Command(BaseCommand):
  15     option_list = BaseCommand.option_list + (
  16         make_option('-t', '--tags', dest='tags', metavar='SLUG,...',
  17             help='Use only books tagged with this tags'),
  18         make_option('-i', '--include', dest='include', metavar='SLUG,...',
  19             help='Include specific books by slug'),
  20         make_option('-e', '--exclude', dest='exclude', metavar='SLUG,...',
  21             help='Exclude specific books by slug')
  22     )
  23     help = 'Prepare ZIP package with files of given type.'
  24     args = '[%s] output_path.zip' % '|'.join(Book.formats)
  25
  26     def handle(self, ftype, path, **options):
  27         self.style = color_style()
  28         verbose = int(options.get('verbosity'))
  29         tags = options.get('tags')
  30         include = options.get('include')
  31         exclude = options.get('exclude')
  32
  33         if ftype in Book.formats:
  34             field = "%s_file" % ftype
  35         else:
  36             print self.style.ERROR('Unknown file type.')
  37             return
  38
  39         books = []
  40
  41         if include:
  42             books += list(Book.objects.filter(slug__in=include.split(',')).only('slug', field))
  43
  44         if tags:
  45             books += list(Book.tagged.with_all(Tag.objects.filter(slug__in=tags.split(','))).only('slug', field))
  46         elif not include:
  47             books = list(Book.objects.all().only('slug', field))
  48
  49         if exclude:
  50             books = [book for book in books if book.slug not in exclude.split(',')]
  51
  52         archive = zipfile.ZipFile(path, 'w', zipfile.ZIP_DEFLATED)
  53
  54         processed = skipped = 0
  55         for book in books:
  56             if verbose >= 2:
  57                 print 'Parsing', book.slug
  58             content = getattr(book, field)
  59             if not content:
  60                 if verbose >= 1:
  61                     print self.style.NOTICE('%s has no %s file' % (book.slug, ftype))
  62                 skipped += 1
  63                 continue
  64             archive.write(content.path, str('%s.%s' % (book.slug, ftype)))
  65             processed += 1
  66         archive.close()
  67
  68         if not processed:
  69             if skipped:
  70                 print self.style.ERROR("No books with %s files found" % ftype)
  71             else:
  72                 print self.style.ERROR("No books found")
  73             return
  74
  75         if verbose >= 1:
  76             print "%d processed, %d skipped" % (processed, skipped)
  77             print "Results written to %s" % path