src/isbn/views.py

   1 from django.contrib.auth.decorators import permission_required
   2 from django.shortcuts import render, get_object_or_404, redirect
   3 from librarian import DCNS, RDFNS
   4 from lxml import etree
   5 from documents.models import Book
   6 from .models import Isbn, IsbnPool
   7
   8
   9 def isbn_list(request):
  10     return render(request, 'isbn/list.html', {
  11         'pools': IsbnPool.objects.all(),
  12         'list': Isbn.objects.all(),
  13     })
  14
  15
  16 MIME = {
  17     'html': 'text/html',
  18     'pdf': 'application/pdf',
  19     'txt': 'text/plain',
  20     'epub': 'application/epub+zip',
  21     'mobi': 'application/x-mobipocket-ebook',
  22 }
  23
  24
  25 @permission_required('isbn.add_isbn')
  26 def generate(request, document_id):
  27     document = get_object_or_404(Book, id=document_id)
  28     book = document.catalogue_book
  29     chunk = document[0]
  30     head = chunk.head
  31     orig_xml = head.materialize()
  32     tree = etree.fromstring(orig_xml)
  33     rdfdesc = tree.find('.//' + RDFNS('Description'))
  34
  35     for form, value in Isbn.formats_from_document(document):
  36         if value: continue
  37         isbn = Isbn.get_for_book(book, form)
  38
  39         etree.SubElement(rdfdesc, DCNS('relation.hasFormat'), id="mobi").text = f"https://wolnelektury.pl/media/book/{form}mobi/{book.slug}.{form}"
  40         etree.SubElement(
  41             rdfdesc, 'meta', refines=f'#{form}', id=f'{form}-id', property='dcterms:identifier'
  42         ).text = 'ISBN-' + isbn.get_code(True)
  43         etree.SubElement(rdfdesc, 'meta', refines=f'#{form}-id', property='identifier-type').text = 'ISBN'
  44         etree.SubElement(rdfdesc, 'meta', refines=f'#{form}', property='dcterms:format').text = MIME[form]
  45
  46     xml = etree.tostring(tree, encoding='unicode')
  47     chunk.commit(
  48         text=xml,
  49         author=request.user,
  50         parent=head,
  51         description='Auto ISBN',
  52         publishable=head.publishable
  53     )
  54
  55     return redirect(document.get_absolute_url())