+category_singular = {
+ 'authors': 'author',
+ 'kinds': 'kind',
+ 'genres': 'genre',
+ 'epochs': 'epoch',
+ 'themes': 'theme',
+ 'books': 'book',
+}
+category_plural = {}
+for k, v in category_singular.items():
+ category_plural[v] = k
+
+book_tag_categories = ['author', 'epoch', 'kind', 'genre']
+
+
+
+def read_tags(tags, allowed):
+ """ Reads a path of filtering tags.
+
+ :param str tags: a path of category and slug pairs, like: authors/an-author/...
+ :returns: list of Tag objects
+ :raises: ValueError when tags can't be found
+ """
+ if not tags:
+ return [], []
+
+ tags = tags.strip('/').split('/')
+ real_tags = []
+ books = []
+ while tags:
+ category = tags.pop(0)
+ slug = tags.pop(0)
+
+ try:
+ category = category_singular[category]
+ except KeyError:
+ raise ValueError('Unknown category.')
+
+ if not category in allowed:
+ raise ValueError('Category not allowed.')
+
+ if category == 'book':
+ try:
+ books.append(Book.objects.get(slug=slug))
+ except Book.DoesNotExist:
+ raise ValueError('Unknown book.')
+
+ try:
+ real_tags.append(Tag.objects.get(category=category, slug=slug))
+ except Tag.DoesNotExist:
+ raise ValueError('Tag not found')
+ return real_tags, books
+
+
+# RESTful handlers
+
+
+class BookMediaHandler(BaseHandler):
+ """ Responsible for representing media in Books. """
+
+ model = BookMedia
+ fields = ['name', 'type', 'url', 'artist', 'director']
+
+ @classmethod
+ def url(cls, media):
+ """ Link to media on site. """
+
+ return MEDIA_BASE + media.file.url
+
+ @classmethod
+ def artist(cls, media):
+ return media.extra_info.get('artist_name', '')
+
+ @classmethod
+ def director(cls, media):
+ return media.extra_info.get('director_name', '')
+
+
+class BookDetails(object):
+ """Custom fields used for representing Books."""
+
+ @classmethod
+ def href(cls, book):
+ """ Returns an URI for a Book in the API. """
+ return API_BASE + reverse("api_book", args=[book.slug])
+
+ @classmethod
+ def url(cls, book):
+ """ Returns Book's URL on the site. """
+
+ return WL_BASE + book.get_absolute_url()
+
+ @classmethod
+ def children(cls, book):
+ """ Returns all children for a book. """
+
+ return book.children.all()
+
+ @classmethod
+ def media(cls, book):
+ """ Returns all media for a book. """
+ return book.media.all()
+
+ @classmethod
+ def cover(cls, book):
+ return MEDIA_BASE + book.cover.url if book.cover else ''
+
+ @classmethod
+ def cover_thumb(cls, book):
+ return MEDIA_BASE + default.backend.get_thumbnail(
+ book.cover, "139x193").url if book.cover else ''
+
+
+
+class BookDetailHandler(BaseHandler, BookDetails):
+ """ Main handler for Book objects.
+
+ Responsible for single Book details.
+ """
+ allowed_methods = ['GET']
+ fields = ['title', 'parent', 'children'] + Book.formats + [
+ 'media', 'url', 'cover', 'cover_thumb'] + [
+ category_plural[c] for c in book_tag_categories]
+
+ @piwik_track
+ def read(self, request, book):
+ """ Returns details of a book, identified by a slug and lang. """
+ try:
+ return Book.objects.get(slug=book)
+ except Book.DoesNotExist:
+ return rc.NOT_FOUND
+
+
+class AnonymousBooksHandler(AnonymousBaseHandler, BookDetails):
+ """ Main handler for Book objects.
+
+ Responsible for lists of Book objects.
+ """
+ allowed_methods = ('GET',)
+ model = Book
+ fields = book_tag_categories + ['href', 'title', 'url', 'cover', 'cover_thumb']
+
+ @classmethod
+ def genres(cls, book):
+ """ Returns all media for a book. """
+ return book.tags.filter(category='genre')
+
+ @piwik_track
+ def read(self, request, tags=None, top_level=False,
+ audiobooks=False, daisy=False, pk=None):
+ """ Lists all books with given tags.
+
+ :param tags: filtering tags; should be a path of categories
+ and slugs, i.e.: authors/an-author/epoch/an-epoch/
+ :param top_level: if True and a book is included in the results,
+ it's children are aren't. By default all books matching the tags
+ are returned.
fnp / wolnelektury.git / blobdiff