src/catalogue/api/views.py

   1 # This file is part of Wolnelektury, licensed under GNU Affero GPLv3 or later.
   2 # Copyright © Fundacja Nowoczesna Polska. See NOTICE for more information.
   3 #
   4 import json
   5 from django.http import Http404, HttpResponse
   6 from django.utils.decorators import method_decorator
   7 from django.views.decorators.cache import never_cache
   8 from rest_framework.generics import ListAPIView, RetrieveAPIView, get_object_or_404
   9 from rest_framework.permissions import DjangoModelPermissionsOrAnonReadOnly
  10 from rest_framework.response import Response
  11 from rest_framework import status
  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 club.permissions import IsClubMember
  20 from wolnelektury.utils import re_escape
  21
  22
  23 book_tag_categories = ['author', 'epoch', 'kind', 'genre']
  24
  25
  26 class CollectionList(ListAPIView):
  27     queryset = Collection.objects.all()
  28     serializer_class = serializers.CollectionListSerializer
  29
  30
  31 @vary_on_auth  # Because of 'liked'.
  32 class CollectionDetail(RetrieveAPIView):
  33     queryset = Collection.objects.all()
  34     lookup_field = 'slug'
  35     serializer_class = serializers.CollectionSerializer
  36
  37
  38 @vary_on_auth  # Because of 'liked'.
  39 class BookList(ListAPIView):
  40     permission_classes = [DjangoModelPermissionsOrAnonReadOnly]
  41     queryset = Book.objects.none()  # Required for DjangoModelPermissions
  42     serializer_class = serializers.BookListSerializer
  43
  44     def get_queryset(self):
  45         try:
  46             tags, ancestors = read_tags(
  47                 self.kwargs.get('tags', ''), self.request,
  48                 allowed=('author', 'epoch', 'kind', 'genre')
  49             )
  50         except ValueError:
  51             raise Http404
  52
  53         new_api = self.request.query_params.get('new_api')
  54         after = self.request.query_params.get('after', self.kwargs.get('after'))
  55         count = self.request.query_params.get('count', self.kwargs.get('count'))
  56         if count:
  57             try:
  58                 count = int(count)
  59             except TypeError:
  60                 raise Http404  # Fixme
  61
  62         if tags:
  63             if self.kwargs.get('top_level'):
  64                 books = Book.tagged_top_level(tags)
  65                 if not books:
  66                     raise Http404
  67                 return books
  68             else:
  69                 books = Book.tagged.with_all(tags)
  70         else:
  71             books = Book.objects.all()
  72         books = order_books(books, new_api)
  73
  74         if self.kwargs.get('top_level'):
  75             books = books.filter(parent=None)
  76         if self.kwargs.get('audiobooks'):
  77             books = books.filter(media__type='mp3').distinct()
  78         if self.kwargs.get('daisy'):
  79             books = books.filter(media__type='daisy').distinct()
  80         if self.kwargs.get('recommended'):
  81             books = books.filter(recommended=True)
  82         if self.kwargs.get('newest'):
  83             books = books.order_by('-created_at')
  84
  85         if after:
  86             books = books_after(books, after, new_api)
  87
  88         prefetch_relations(books, 'author')
  89         prefetch_relations(books, 'genre')
  90         prefetch_relations(books, 'kind')
  91         prefetch_relations(books, 'epoch')
  92
  93         if count:
  94             books = books[:count]
  95
  96         return books
  97
  98     def post(self, request, **kwargs):
  99         if kwargs.get('audiobooks'):
 100             return self.post_audiobook(request, **kwargs)
 101         else:
 102             return self.post_book(request, **kwargs)
 103
 104     def post_book(self, request, **kwargs):
 105         data = json.loads(request.POST.get('data'))
 106         form = BookImportForm(data)
 107         if form.is_valid():
 108             form.save()
 109             return Response({}, status=status.HTTP_201_CREATED)
 110         else:
 111             raise Http404
 112
 113     def post_audiobook(self, request, **kwargs):
 114         index = int(request.POST['part_index'])
 115         parts_count = int(request.POST['parts_count'])
 116         media_type = request.POST['type'].lower()
 117         source_sha1 = request.POST.get('source_sha1')
 118         name = request.POST.get('name', '')
 119         part_name = request.POST.get('part_name', '')
 120
 121         _rest, slug = request.POST['book'].rstrip('/').rsplit('/', 1)
 122         book = Book.objects.get(slug=slug)
 123
 124         try:
 125             assert source_sha1
 126             bm = book.media.get(type=media_type, source_sha1=source_sha1)
 127         except (AssertionError, BookMedia.DoesNotExist):
 128             bm = BookMedia(book=book, type=media_type)
 129         bm.name = name
 130         bm.part_name = part_name
 131         bm.index = index
 132         bm.file.save(None, request.data['file'], save=False)
 133         bm.save(parts_count=parts_count)
 134
 135         return Response({}, status=status.HTTP_201_CREATED)
 136
 137
 138 @vary_on_auth  # Because of 'liked'.
 139 class BookDetail(RetrieveAPIView):
 140     queryset = Book.objects.all()
 141     lookup_field = 'slug'
 142     serializer_class = serializers.BookDetailSerializer
 143
 144
 145 class EbookList(BookList):
 146     serializer_class = serializers.EbookSerializer
 147
 148
 149 @vary_on_auth  # Because of 'liked'.
 150 class Preview(ListAPIView):
 151     queryset = Book.objects.filter(preview=True)
 152     serializer_class = serializers.BookPreviewSerializer
 153
 154
 155 @vary_on_auth  # Because of 'liked'.
 156 class FilterBookList(ListAPIView):
 157     serializer_class = serializers.FilterBookListSerializer
 158
 159     def parse_bool(self, s):
 160         if s in ('true', 'false'):
 161             return s == 'true'
 162         else:
 163             return None
 164
 165     def get_queryset(self):
 166         key_sep = '$'
 167         search_string = self.request.query_params.get('search')
 168         is_lektura = self.parse_bool(self.request.query_params.get('lektura'))
 169         is_audiobook = self.parse_bool(self.request.query_params.get('audiobook'))
 170         preview = self.parse_bool(self.request.query_params.get('preview'))
 171
 172         new_api = self.request.query_params.get('new_api')
 173         after = self.request.query_params.get('after')
 174         count = int(self.request.query_params.get('count', 50))
 175         books = order_books(Book.objects.distinct(), new_api)
 176         if is_lektura is not None:
 177             books = books.filter(has_audience=is_lektura)
 178         if is_audiobook is not None:
 179             if is_audiobook:
 180                 books = books.filter(media__type='mp3')
 181             else:
 182                 books = books.exclude(media__type='mp3')
 183         if preview is not None:
 184             books = books.filter(preview=preview)
 185         for category in book_tag_categories:
 186             category_plural = category + 's'
 187             if category_plural in self.request.query_params:
 188                 slugs = self.request.query_params[category_plural].split(',')
 189                 tags = Tag.objects.filter(category=category, slug__in=slugs)
 190                 books = Book.tagged.with_any(tags, books)
 191         if (search_string is not None) and len(search_string) < 3:
 192             search_string = None
 193         if search_string:
 194             search_string = re_escape(search_string)
 195             books_author = books.filter(cached_author__iregex=r'\m' + search_string)
 196             books_title = books.filter(title__iregex=r'\m' + search_string)
 197             books_title = books_title.exclude(id__in=list(books_author.values_list('id', flat=True)))
 198             if after and (key_sep in after):
 199                 which, key = after.split(key_sep, 1)
 200                 if which == 'title':
 201                     book_lists = [(books_after(books_title, key, new_api), 'title')]
 202                 else:  # which == 'author'
 203                     book_lists = [(books_after(books_author, key, new_api), 'author'), (books_title, 'title')]
 204             else:
 205                 book_lists = [(books_author, 'author'), (books_title, 'title')]
 206         else:
 207             if after and key_sep in after:
 208                 which, key = after.split(key_sep, 1)
 209                 books = books_after(books, key, new_api)
 210             book_lists = [(books, 'book')]
 211
 212         filtered_books = []
 213         for book_list, label in book_lists:
 214             for category in book_tag_categories:
 215                 book_list = prefetch_relations(book_list, category)
 216             remaining_count = count - len(filtered_books)
 217             for book in book_list[:remaining_count]:
 218                 book.key = '%s%s%s' % (
 219                     label, key_sep, book.slug if not new_api else book.full_sort_key())
 220                 filtered_books.append(book)
 221             if len(filtered_books) == count:
 222                 break
 223
 224         return filtered_books
 225
 226
 227 class EpubView(RetrieveAPIView):
 228     queryset = Book.objects.all()
 229     lookup_field = 'slug'
 230     permission_classes = [IsClubMember]
 231
 232     @method_decorator(never_cache)
 233     def get(self, *args, **kwargs):
 234         return HttpResponse(self.get_object().get_media('epub'))
 235
 236
 237 class TagCategoryView(ListAPIView):
 238     serializer_class = serializers.TagSerializer
 239
 240     def get_queryset(self):
 241         category = self.kwargs['category']
 242         tags = Tag.objects.filter(category=category).exclude(items=None).order_by('slug')
 243         if self.request.query_params.get('book_only') == 'true':
 244             tags = tags.filter(for_books=True)
 245         if self.request.GET.get('picture_only') == 'true':
 246             tags = filter(for_pictures=True)
 247
 248         after = self.request.query_params.get('after')
 249         count = self.request.query_params.get('count')
 250         if after:
 251             tags = tags.filter(slug__gt=after)
 252         if count:
 253             tags = tags[:count]
 254
 255         return tags
 256
 257
 258 class TagView(RetrieveAPIView):
 259     serializer_class = serializers.TagDetailSerializer
 260
 261     def get_object(self):
 262         return get_object_or_404(
 263             Tag,
 264             category=self.kwargs['category'],
 265             slug=self.kwargs['slug']
 266         )
 267
 268
 269 @vary_on_auth  # Because of 'liked'.
 270 class FragmentList(ListAPIView):
 271     serializer_class = serializers.FragmentSerializer
 272
 273     def get_queryset(self):
 274         try:
 275             tags, ancestors = read_tags(
 276                 self.kwargs['tags'],
 277                 self.request,
 278                 allowed={'author', 'epoch', 'kind', 'genre', 'book', 'theme'}
 279             )
 280         except ValueError:
 281             raise Http404
 282         return Fragment.tagged.with_all(tags).select_related('book')
 283
 284
 285 @vary_on_auth  # Because of 'liked'.
 286 class FragmentView(RetrieveAPIView):
 287     serializer_class = serializers.FragmentDetailSerializer
 288
 289     def get_object(self):
 290         return get_object_or_404(
 291             Fragment,
 292             book__slug=self.kwargs['book'],
 293             anchor=self.kwargs['anchor']
 294         )