--- /dev/null
+# -*- coding: utf-8 -*-
+# This file is part of Wolnelektury, licensed under GNU Affero GPLv3 or later.
+# Copyright © Fundacja Nowoczesna Polska. See NOTICE for more information.
+#
+import json
+
+from django.contrib.sites.models import Site
+from django.core.urlresolvers import reverse
+from django.utils.functional import lazy
+from piston.handler import AnonymousBaseHandler, BaseHandler
+from piston.utils import rc
+from sorl.thumbnail import default
+
+from catalogue.forms import BookImportForm
+from catalogue.models import Book, Tag, BookMedia, Fragment, Collection
+from picture.models import Picture
+from picture.forms import PictureImportForm
+
+from stats.utils import piwik_track
+
+from . import emitters # Register our emitters
+
+API_BASE = WL_BASE = MEDIA_BASE = lazy(
+ lambda: u'http://' + Site.objects.get_current().domain, unicode)()
+
+
+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.
+ """
+ if pk is not None:
+ try:
+ return Book.objects.get(pk=pk)
+ except Book.DoesNotExist:
+ return rc.NOT_FOUND
+
+ try:
+ tags, _ancestors = read_tags(tags, allowed=book_tag_categories)
+ except ValueError:
+ return rc.NOT_FOUND
+
+ if tags:
+ if top_level:
+ books = Book.tagged_top_level(tags)
+ return books if books else rc.NOT_FOUND
+ else:
+ books = Book.tagged.with_all(tags)
+ else:
+ books = Book.objects.all()
+
+ if top_level:
+ books = books.filter(parent=None)
+ if audiobooks:
+ books = books.filter(media__type='mp3').distinct()
+ if daisy:
+ books = books.filter(media__type='daisy').distinct()
+
+ if books.exists():
+ return books
+ else:
+ return rc.NOT_FOUND
+
+ def create(self, request, *args, **kwargs):
+ return rc.FORBIDDEN
+
+
+class BooksHandler(BookDetailHandler):
+ allowed_methods = ('GET', 'POST')
+ model = Book
+ fields = book_tag_categories + ['href', 'title', 'url', 'cover', 'cover_thumb']
+ anonymous = AnonymousBooksHandler
+
+ def create(self, request, *args, **kwargs):
+ if not request.user.has_perm('catalogue.add_book'):
+ return rc.FORBIDDEN
+
+ data = json.loads(request.POST.get('data'))
+ form = BookImportForm(data)
+ if form.is_valid():
+ form.save()
+ return rc.CREATED
+ else:
+ return rc.NOT_FOUND
+
+
+class EBooksHandler(AnonymousBooksHandler):
+ fields = ('author', 'href', 'title', 'cover') + tuple(Book.ebook_formats)
+
+
+# add categorized tags fields for Book
+def _tags_getter(category):
+ @classmethod
+ def get_tags(cls, book):
+ return book.tags.filter(category=category)
+ return get_tags
+def _tag_getter(category):
+ @classmethod
+ def get_tag(cls, book):
+ return ', '.join(tag.name for tag in book.tags.filter(category=category))
+ return get_tag
+for plural, singular in category_singular.items():
+ setattr(BookDetails, plural, _tags_getter(singular))
+ setattr(BookDetails, singular, _tag_getter(singular))
+
+# add fields for files in Book
+def _file_getter(format):
+ field = "%s_file" % format
+ @classmethod
+ def get_file(cls, book):
+ f = getattr(book, field)
+ if f:
+ return MEDIA_BASE + f.url
+ else:
+ return ''
+ return get_file
+for format in Book.formats:
+ setattr(BookDetails, format, _file_getter(format))
+
+
+class CollectionDetails(object):
+ """Custom Collection fields."""
+
+ @classmethod
+ def href(cls, collection):
+ """ Returns URI in the API for the collection. """
+
+ return API_BASE + reverse("api_collection", args=[collection.slug])
+
+ @classmethod
+ def url(cls, collection):
+ """ Returns URL on the site. """
+
+ return WL_BASE + collection.get_absolute_url()
+
+ @classmethod
+ def books(cls, collection):
+ return Book.objects.filter(collection.get_query())
+
+
+
+class CollectionDetailHandler(BaseHandler, CollectionDetails):
+ allowed_methods = ('GET',)
+ fields = ['url', 'title', 'description', 'books']
+
+ @piwik_track
+ def read(self, request, slug):
+ """ Returns details of a collection, identified by slug. """
+ try:
+ return Collection.objects.get(slug=slug)
+ except Collection.DoesNotExist:
+ return rc.NOT_FOUND
+
+
+class CollectionsHandler(BaseHandler, CollectionDetails):
+ allowed_methods = ('GET',)
+ model = Collection
+ fields = ['url', 'href', 'title']
+
+ @piwik_track
+ def read(self, request):
+ """ Returns all collections. """
+ return Collection.objects.all()
+
+
+class TagDetails(object):
+ """Custom Tag fields."""
+
+ @classmethod
+ def href(cls, tag):
+ """ Returns URI in the API for the tag. """
+
+ return API_BASE + reverse("api_tag", args=[category_plural[tag.category], tag.slug])
+
+ @classmethod
+ def url(cls, tag):
+ """ Returns URL on the site. """
+
+ return WL_BASE + tag.get_absolute_url()
+
+
+class TagDetailHandler(BaseHandler, TagDetails):
+ """ Responsible for details of a single Tag object. """
+
+ fields = ['name', 'url', 'sort_key', 'description']
+
+ @piwik_track
+ def read(self, request, category, slug):
+ """ Returns details of a tag, identified by category and slug. """
+
+ try:
+ category_sng = category_singular[category]
+ except KeyError, e:
+ return rc.NOT_FOUND
+
+ try:
+ return Tag.objects.get(category=category_sng, slug=slug)
+ except Tag.DoesNotExist:
+ return rc.NOT_FOUND
+
+
+class TagsHandler(BaseHandler, TagDetails):
+ """ Main handler for Tag objects.
+
+ Responsible for lists of Tag objects
+ and fields used for representing Tags.
+
+ """
+ allowed_methods = ('GET',)
+ model = Tag
+ fields = ['name', 'href', 'url']
+
+ @piwik_track
+ def read(self, request, category=None, pk=None):
+ """ Lists all tags in the category (eg. all themes). """
+ if pk is not None:
+ try:
+ return Tag.objects.exclude(category='set').get(pk=pk)
+ except Book.DoesNotExist:
+ return rc.NOT_FOUND
+
+ try:
+ category_sng = category_singular[category]
+ except KeyError, e:
+ return rc.NOT_FOUND
+
+ tags = Tag.objects.filter(category=category_sng).exclude(items=None)
+ if tags.exists():
+ return tags
+ else:
+ return rc.NOT_FOUND
+
+
+class FragmentDetails(object):
+ """Custom Fragment fields."""
+
+ @classmethod
+ def href(cls, fragment):
+ """ Returns URI in the API for the fragment. """
+
+ return API_BASE + reverse("api_fragment",
+ args=[fragment.book.slug, fragment.anchor])
+
+ @classmethod
+ def url(cls, fragment):
+ """ Returns URL on the site for the fragment. """
+
+ return WL_BASE + fragment.get_absolute_url()
+
+ @classmethod
+ def themes(cls, fragment):
+ """ Returns a list of theme tags for the fragment. """
+
+ return fragment.tags.filter(category='theme')
+
+
+class FragmentDetailHandler(BaseHandler, FragmentDetails):
+ fields = ['book', 'anchor', 'text', 'url', 'themes']
+
+ @piwik_track
+ def read(self, request, book, anchor):
+ """ Returns details of a fragment, identified by book slug and anchor. """
+ try:
+ return Fragment.objects.get(book__slug=book, anchor=anchor)
+ except Fragment.DoesNotExist:
+ return rc.NOT_FOUND
+
+
+class FragmentsHandler(BaseHandler, FragmentDetails):
+ """ Main handler for Fragments.
+
+ Responsible for lists of Fragment objects
+ and fields used for representing Fragments.
+
+ """
+ model = Fragment
+ fields = ['book', 'url', 'anchor', 'href']
+ allowed_methods = ('GET',)
+
+ categories = set(['author', 'epoch', 'kind', 'genre', 'book', 'theme'])
+
+ @piwik_track
+ def read(self, request, tags):
+ """ Lists all fragments with given book, tags, themes.
+
+ :param tags: should be a path of categories and slugs, i.e.:
+ books/book-slug/authors/an-author/themes/a-theme/
+
+ """
+ try:
+ tags, ancestors = read_tags(tags, allowed=self.categories)
+ except ValueError:
+ return rc.NOT_FOUND
+ fragments = Fragment.tagged.with_all(tags).select_related('book')
+ if fragments.exists():
+ return fragments
+ else:
+ return rc.NOT_FOUND
+
+
+class PictureHandler(BaseHandler):
+ model = Picture
+ fields = ('slug', 'title')
+ allowed_methods = ('POST',)
+
+ def create(self, request):
+ if not request.user.has_perm('picture.add_picture'):
+ return rc.FORBIDDEN
+
+ data = json.loads(request.POST.get('data'))
+ form = PictureImportForm(data)
+ if form.is_valid():
+ form.save()
+ return rc.CREATED
+ else:
+ return rc.NOT_FOUND
fnp / wolnelektury.git / blobdiff