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 import re
   6 import sys
   7 from cPickle import load, dump
   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 import zipfile
  13
  14 from catalogue.models import Book, Tag
  15
  16
  17 class Command(BaseCommand):
  18     option_list = BaseCommand.option_list + (
  19         make_option('-t', '--tags', dest='tags', metavar='SLUG,...',
  20             help='Use only books tagged with this tags'),
  21         make_option('-i', '--include', dest='include', metavar='SLUG,...',
  22             help='Include specific books by slug'),
  23         make_option('-e', '--exclude', dest='exclude', metavar='SLUG,...',
  24             help='Exclude specific books by slug')
  25     )
  26     help = 'Prepare data for Lesmianator.'
  27     ftypes = ['xml', 'txt', 'html', 'epub', 'pdf']
  28     args = '[%s] output_path.zip' % '|'.join(ftypes)
  29
  30     def handle(self, ftype, path, **options):
  31         self.style = color_style()
  32         verbose = int(options.get('verbosity'))
  33         tags = options.get('tags')
  34         include = options.get('include')
  35         exclude = options.get('exclude')
  36
  37         if ftype in self.ftypes:
  38             field = "%s_file" % ftype
  39         else:
  40             print self.style.ERROR('Unknown file type.')
  41             return
  42
  43         books = []
  44
  45         if include:
  46             books += list(Book.objects.filter(slug__in=include.split(',')).only('slug', field))
  47
  48         if tags:
  49             books += list(Book.tagged.with_all(Tag.objects.filter(slug__in=tags.split(','))).only('slug', field))
  50         elif not include:
  51             books = list(Book.objects.all().only('slug', field))
  52
  53         if exclude:
  54             books = [book for book in books if book.slug not in exclude.split(',')]
  55
  56         archive = zipfile.ZipFile(path, 'w', zipfile.ZIP_DEFLATED)
  57
  58         processed = skipped = 0
  59         for book in books:
  60             if verbose >= 2:
  61                 print 'Parsing', book.slug
  62             content = getattr(book, field)
  63             if not content:
  64                 if verbose >= 1:
  65                     print self.style.NOTICE('%s has no %s file' % (book.slug, ftype))
  66                 skipped += 1
  67                 continue
  68             archive.write(content.path, str('%s.%s' % (book.slug, ftype)))
  69             processed += 1
  70         archive.close()
  71
  72         if not processed:
  73             if skipped:
  74                 print self.style.ERROR("No books with %s files found" % ftype)
  75             else:
  76                 print self.style.ERROR("No books found")
  77             return
  78
  79         if verbose >= 1:
  80             print "%d processed, %d skipped" % (processed, skipped)
  81             print "Results written to %s" % path