src/catalogue/management/commands/pack.py

   1 # This file is part of Wolnelektury, licensed under GNU Affero GPLv3 or later.
   2 # Copyright © Fundacja Nowoczesna Polska. See NOTICE for more information.
   3 #
   4 import zipfile
   5 from django.core.management.base import BaseCommand
   6 from django.core.management.color import color_style
   7 from catalogue.models import Book, Tag
   8
   9
  10 class Command(BaseCommand):
  11     help = 'Prepare ZIP package with files of given type.'
  12
  13     def add_arguments(self, parser):
  14         parser.add_argument(
  15                 '-t', '--tags', dest='tags', metavar='SLUG,...',
  16                 help='Use only books tagged with this tags')
  17         parser.add_argument(
  18                 '-i', '--include', dest='include', metavar='SLUG,...',
  19                 help='Include specific books by slug')
  20         parser.add_argument(
  21                 '-e', '--exclude', dest='exclude', metavar='SLUG,...',
  22                 help='Exclude specific books by slug')
  23         parser.add_argument('ftype', metavar='|'.join(Book.formats))
  24         parser.add_argument('path', metavar='output_path.zip')
  25
  26     def handle(self, **options):
  27         self.style = color_style()
  28         ftype = options['ftype']
  29         path = options['path']
  30         verbose = int(options.get('verbosity'))
  31         tags = options.get('tags')
  32         include = options.get('include')
  33         exclude = options.get('exclude')
  34
  35         if ftype in Book.formats:
  36             field = "%s_file" % ftype
  37         else:
  38             print(self.style.ERROR('Unknown file type.'))
  39             return
  40
  41         books = []
  42
  43         if include:
  44             books += list(Book.objects.filter(slug__in=include.split(',')).only('slug', field))
  45
  46         if tags:
  47             books += list(Book.tagged.with_all(Tag.objects.filter(slug__in=tags.split(','))).only('slug', field))
  48         elif not include:
  49             books = list(Book.objects.all().only('slug', field))
  50
  51         if exclude:
  52             books = [book for book in books if book.slug not in exclude.split(',')]
  53
  54         archive = zipfile.ZipFile(path, 'w', zipfile.ZIP_DEFLATED)
  55
  56         processed = skipped = 0
  57         for book in books:
  58             if verbose >= 2:
  59                 print('Parsing', book.slug)
  60             content = getattr(book, field)
  61             if not content:
  62                 if verbose >= 1:
  63                     print(self.style.NOTICE('%s has no %s file' % (book.slug, ftype)))
  64                 skipped += 1
  65                 continue
  66             archive.write(content.path, str('%s.%s' % (book.slug, ftype)))
  67             processed += 1
  68         archive.close()
  69
  70         if not processed:
  71             if skipped:
  72                 print(self.style.ERROR("No books with %s files found" % ftype))
  73             else:
  74                 print(self.style.ERROR("No books found"))
  75             return
  76
  77         if verbose >= 1:
  78             print("%d processed, %d skipped" % (processed, skipped))
  79             print("Results written to %s" % path)