src/catalogue/api/views.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 json
   6 from django.http import Http404, HttpResponse
   7 from rest_framework.generics import ListAPIView, RetrieveAPIView, get_object_or_404
   8 from rest_framework.permissions import DjangoModelPermissionsOrAnonReadOnly
   9 from rest_framework.response import Response
  10 from rest_framework import status
  11 from paypal.permissions import IsSubscribed
  12 from api.handlers import read_tags
  13 from api.utils import vary_on_auth
  14 from .helpers import books_after, order_books
  15 from . import serializers
  16 from catalogue.forms import BookImportForm
  17 from catalogue.models import Book, Collection, Tag, Fragment, BookMedia
  18 from catalogue.models.tag import prefetch_relations
  19 from wolnelektury.utils import re_escape
  20
  21
  22 book_tag_categories = ['author', 'epoch', 'kind', 'genre']
  23
  24
  25 class CollectionList(ListAPIView):
  26     queryset = Collection.objects.all()
  27     serializer_class = serializers.CollectionListSerializer
  28
  29
  30 @vary_on_auth  # Because of 'liked'.
  31 class CollectionDetail(RetrieveAPIView):
  32     queryset = Collection.objects.all()
  33     lookup_field = 'slug'
  34     serializer_class = serializers.CollectionSerializer
  35
  36
  37 @vary_on_auth  # Because of 'liked'.
  38 class BookList(ListAPIView):
  39     permission_classes = [DjangoModelPermissionsOrAnonReadOnly]
  40     queryset = Book.objects.none()  # Required for DjangoModelPermissions
  41     serializer_class = serializers.BookListSerializer
  42
  43     def get_queryset(self):
  44         try:
  45             tags, ancestors = read_tags(
  46                 self.kwargs.get('tags', ''), self.request,
  47                 allowed=('author', 'epoch', 'kind', 'genre')
  48             )
  49         except ValueError:
  50             raise Http404
  51
  52         new_api = self.request.query_params.get('new_api')
  53         after = self.request.query_params.get('after', self.kwargs.get('after'))
  54         count = self.request.query_params.get('count', self.kwargs.get('count'))
  55
  56         if tags:
  57             if self.kwargs.get('top_level'):
  58                 books = Book.tagged_top_level(tags)
  59                 if not books:
  60                     raise Http404
  61                 return books
  62             else:
  63                 books = Book.tagged.with_all(tags)
  64         else:
  65             books = Book.objects.all()
  66         books = order_books(books, new_api)
  67
  68         if self.kwargs.get('top_level'):
  69             books = books.filter(parent=None)
  70         if self.kwargs.get('audiobooks'):
  71             books = books.filter(media__type='mp3').distinct()
  72         if self.kwargs.get('daisy'):
  73             books = books.filter(media__type='daisy').distinct()
  74         if self.kwargs.get('recommended'):
  75             books = books.filter(recommended=True)
  76         if self.kwargs.get('newest'):
  77             books = books.order_by('-created_at')
  78
  79         if after:
  80             books = books_after(books, after, new_api)
  81
  82         prefetch_relations(books, 'author')
  83         prefetch_relations(books, 'genre')
  84         prefetch_relations(books, 'kind')
  85         prefetch_relations(books, 'epoch')
  86
  87         if count:
  88             books = books[:count]
  89
  90         return books
  91
  92     def post(self, request, **kwargs):
  93         if kwargs.get('audiobooks'):
  94             return self.post_audiobook(request, **kwargs)
  95         else:
  96             return self.post_book(request, **kwargs)
  97
  98     def post_book(self, request, **kwargs):
  99         data = json.loads(request.POST.get('data'))
 100         form = BookImportForm(data)
 101         if form.is_valid():
 102             form.save()
 103             return Response({}, status=status.HTTP_201_CREATED)
 104         else:
 105             raise Http404
 106
 107     def post_audiobook(self, request, **kwargs):
 108         index = int(request.POST['part_index'])
 109         parts_count = int(request.POST['parts_count'])
 110         media_type = request.POST['type'].lower()
 111         source_sha1 = request.POST.get('source_sha1')
 112         name = request.POST.get('name', '')
 113         part_name = request.POST.get('part_name', '')
 114
 115         _rest, slug = request.POST['book'].rstrip('/').rsplit('/', 1)
 116         book = Book.objects.get(slug=slug)
 117
 118         try:
 119             assert source_sha1
 120             bm = book.media.get(type=media_type, source_sha1=source_sha1)
 121         except (AssertionError, BookMedia.DoesNotExist):
 122             bm = BookMedia(book=book, type=media_type)
 123         bm.name = name
 124         bm.part_name = part_name
 125         bm.index = index
 126         bm.file.save(None, request.data['file'], save=False)
 127         bm.save(parts_count=parts_count)
 128
 129         return Response({}, status=status.HTTP_201_CREATED)
 130
 131
 132 @vary_on_auth  # Because of 'liked'.
 133 class BookDetail(RetrieveAPIView):
 134     queryset = Book.objects.all()
 135     lookup_field = 'slug'
 136     serializer_class = serializers.BookDetailSerializer
 137
 138
 139 class EbookList(BookList):
 140     serializer_class = serializers.EbookSerializer
 141
 142
 143 @vary_on_auth  # Because of 'liked'.
 144 class Preview(ListAPIView):
 145     queryset = Book.objects.filter(preview=True)
 146     serializer_class = serializers.BookPreviewSerializer
 147
 148
 149 @vary_on_auth  # Because of 'liked'.
 150 class FilterBookList(ListAPIView):
 151     serializer_class = serializers.FilterBookListSerializer
 152
 153     def parse_bool(self, s):
 154         if s in ('true', 'false'):
 155             return s == 'true'
 156         else:
 157             return None
 158
 159     def get_queryset(self):
 160         key_sep = '$'
 161         search_string = self.request.query_params.get('search')
 162         is_lektura = self.parse_bool(self.request.query_params.get('lektura'))
 163         is_audiobook = self.parse_bool(self.request.query_params.get('audiobook'))
 164         preview = self.parse_bool(self.request.query_params.get('preview'))
 165
 166         new_api = self.request.query_params.get('new_api')
 167         after = self.request.query_params.get('after')
 168         count = int(self.request.query_params.get('count', 50))
 169         books = order_books(Book.objects.distinct(), new_api)
 170         if is_lektura is not None:
 171             books = books.filter(has_audience=is_lektura)
 172         if is_audiobook is not None:
 173             if is_audiobook:
 174                 books = books.filter(media__type='mp3')
 175             else:
 176                 books = books.exclude(media__type='mp3')
 177         if preview is not None:
 178             books = books.filter(preview=preview)
 179         for category in book_tag_categories:
 180             category_plural = category + 's'
 181             if category_plural in self.request.query_params:
 182                 slugs = self.request.query_params[category_plural].split(',')
 183                 tags = Tag.objects.filter(category=category, slug__in=slugs)
 184                 books = Book.tagged.with_any(tags, books)
 185         if (search_string is not None) and len(search_string) < 3:
 186             search_string = None
 187         if search_string:
 188             search_string = re_escape(search_string)
 189             books_author = books.filter(cached_author__iregex=r'\m' + search_string)
 190             books_title = books.filter(title__iregex=r'\m' + search_string)
 191             books_title = books_title.exclude(id__in=list(books_author.values_list('id', flat=True)))
 192             if after and (key_sep in after):
 193                 which, key = after.split(key_sep, 1)
 194                 if which == 'title':
 195                     book_lists = [(books_after(books_title, key, new_api), 'title')]
 196                 else:  # which == 'author'
 197                     book_lists = [(books_after(books_author, key, new_api), 'author'), (books_title, 'title')]
 198             else:
 199                 book_lists = [(books_author, 'author'), (books_title, 'title')]
 200         else:
 201             if after and key_sep in after:
 202                 which, key = after.split(key_sep, 1)
 203                 books = books_after(books, key, new_api)
 204             book_lists = [(books, 'book')]
 205
 206         filtered_books = []
 207         for book_list, label in book_lists:
 208             for category in book_tag_categories:
 209                 book_list = prefetch_relations(book_list, category)
 210             remaining_count = count - len(filtered_books)
 211             for book in book_list[:remaining_count]:
 212                 book.key = '%s%s%s' % (
 213                     label, key_sep, book.slug if not new_api else book.full_sort_key())
 214                 filtered_books.append(book)
 215             if len(filtered_books) == count:
 216                 break
 217
 218         return filtered_books
 219
 220
 221 class EpubView(RetrieveAPIView):
 222     queryset = Book.objects.all()
 223     lookup_field = 'slug'
 224     permission_classes = [IsSubscribed]
 225
 226     def get(self, *args, **kwargs):
 227         return HttpResponse(self.get_object().get_media('epub'))
 228
 229
 230 class TagCategoryView(ListAPIView):
 231     serializer_class = serializers.TagSerializer
 232
 233     def get_queryset(self):
 234         category = self.kwargs['category']
 235         tags = Tag.objects.filter(category=category).exclude(items=None).order_by('slug')
 236         if self.request.query_params.get('book_only') == 'true':
 237             tags = tags.filter(for_books=True)
 238         if self.request.GET.get('picture_only') == 'true':
 239             tags = filter(for_pictures=True)
 240
 241         after = self.request.query_params.get('after')
 242         count = self.request.query_params.get('count')
 243         if after:
 244             tags = tags.filter(slug__gt=after)
 245         if count:
 246             tags = tags[:count]
 247
 248         return tags
 249
 250
 251 class TagView(RetrieveAPIView):
 252     serializer_class = serializers.TagDetailSerializer
 253
 254     def get_object(self):
 255         return get_object_or_404(
 256             Tag,
 257             category=self.kwargs['category'],
 258             slug=self.kwargs['slug']
 259         )
 260
 261
 262 @vary_on_auth  # Because of 'liked'.
 263 class FragmentList(ListAPIView):
 264     serializer_class = serializers.FragmentSerializer
 265
 266     def get_queryset(self):
 267         try:
 268             tags, ancestors = read_tags(
 269                 self.kwargs['tags'],
 270                 self.request,
 271                 allowed={'author', 'epoch', 'kind', 'genre', 'book', 'theme'}
 272             )
 273         except ValueError:
 274             raise Http404
 275         return Fragment.tagged.with_all(tags).select_related('book')
 276
 277
 278 @vary_on_auth  # Because of 'liked'.
 279 class FragmentView(RetrieveAPIView):
 280     serializer_class = serializers.FragmentDetailSerializer
 281
 282     def get_object(self):
 283         return get_object_or_404(
 284             Fragment,
 285             book__slug=self.kwargs['book'],
 286             anchor=self.kwargs['anchor']
 287         )