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 club.models import Membership
  15 from .helpers import books_after, order_books
  16 from . import serializers
  17 from catalogue.forms import BookImportForm
  18 from catalogue.models import Book, Collection, Tag, Fragment, BookMedia
  19 from catalogue.models.tag import prefetch_relations
  20 from club.permissions import IsClubMember
  21 from wolnelektury.utils import re_escape
  22
  23
  24 book_tag_categories = ['author', 'epoch', 'kind', 'genre']
  25
  26
  27 class CollectionList(ListAPIView):
  28     queryset = Collection.objects.all()
  29     serializer_class = serializers.CollectionListSerializer
  30
  31
  32 @vary_on_auth  # Because of 'liked'.
  33 class CollectionDetail(RetrieveAPIView):
  34     queryset = Collection.objects.all()
  35     lookup_field = 'slug'
  36     serializer_class = serializers.CollectionSerializer
  37
  38
  39 @vary_on_auth  # Because of 'liked'.
  40 class BookList(ListAPIView):
  41     permission_classes = [DjangoModelPermissionsOrAnonReadOnly]
  42     queryset = Book.objects.none()  # Required for DjangoModelPermissions
  43     serializer_class = serializers.BookListSerializer
  44
  45     def get_queryset(self):
  46         try:
  47             tags, ancestors = read_tags(
  48                 self.kwargs.get('tags', ''), self.request,
  49                 allowed=('author', 'epoch', 'kind', 'genre')
  50             )
  51         except ValueError:
  52             raise Http404
  53
  54         new_api = self.request.query_params.get('new_api')
  55         after = self.request.query_params.get('after', self.kwargs.get('after'))
  56         count = self.request.query_params.get('count', self.kwargs.get('count'))
  57         if count:
  58             try:
  59                 count = int(count)
  60             except TypeError:
  61                 raise Http404  # Fixme
  62
  63         if tags:
  64             if self.kwargs.get('top_level'):
  65                 books = Book.tagged_top_level(tags)
  66                 if not books:
  67                     raise Http404
  68                 return books
  69             else:
  70                 books = Book.tagged.with_all(tags)
  71         else:
  72             books = Book.objects.all()
  73         books = order_books(books, new_api)
  74
  75         if not Membership.is_active_for(self.request.user):
  76             books = books.exclude(preview=True)
  77
  78         if self.kwargs.get('top_level'):
  79             books = books.filter(parent=None)
  80         if self.kwargs.get('audiobooks'):
  81             books = books.filter(media__type='mp3').distinct()
  82         if self.kwargs.get('daisy'):
  83             books = books.filter(media__type='daisy').distinct()
  84         if self.kwargs.get('recommended'):
  85             books = books.filter(recommended=True)
  86         if self.kwargs.get('newest'):
  87             books = books.order_by('-created_at')
  88
  89         if after:
  90             books = books_after(books, after, new_api)
  91
  92         prefetch_relations(books, 'author')
  93         prefetch_relations(books, 'genre')
  94         prefetch_relations(books, 'kind')
  95         prefetch_relations(books, 'epoch')
  96
  97         if count:
  98             books = books[:count]
  99
 100         return books
 101
 102     def post(self, request, **kwargs):
 103         if kwargs.get('audiobooks'):
 104             return self.post_audiobook(request, **kwargs)
 105         else:
 106             return self.post_book(request, **kwargs)
 107
 108     def post_book(self, request, **kwargs):
 109         data = json.loads(request.POST.get('data'))
 110         form = BookImportForm(data)
 111         if form.is_valid():
 112             form.save()
 113             return Response({}, status=status.HTTP_201_CREATED)
 114         else:
 115             raise Http404
 116
 117     def post_audiobook(self, request, **kwargs):
 118         index = int(request.POST['part_index'])
 119         parts_count = int(request.POST['parts_count'])
 120         media_type = request.POST['type'].lower()
 121         source_sha1 = request.POST.get('source_sha1')
 122         name = request.POST.get('name', '')
 123         part_name = request.POST.get('part_name', '')
 124
 125         _rest, slug = request.POST['book'].rstrip('/').rsplit('/', 1)
 126         book = Book.objects.get(slug=slug)
 127
 128         try:
 129             assert source_sha1
 130             bm = book.media.get(type=media_type, source_sha1=source_sha1)
 131         except (AssertionError, BookMedia.DoesNotExist):
 132             bm = BookMedia(book=book, type=media_type)
 133         bm.name = name
 134         bm.part_name = part_name
 135         bm.index = index
 136         bm.file.save(None, request.data['file'], save=False)
 137         bm.save(parts_count=parts_count)
 138
 139         return Response({}, status=status.HTTP_201_CREATED)
 140
 141
 142 @vary_on_auth  # Because of 'liked'.
 143 class BookDetail(RetrieveAPIView):
 144     queryset = Book.objects.all()
 145     lookup_field = 'slug'
 146     serializer_class = serializers.BookDetailSerializer
 147
 148
 149 @vary_on_auth  # Because of embargo links.
 150 class EbookList(BookList):
 151     serializer_class = serializers.EbookSerializer
 152
 153
 154 @method_decorator(never_cache, name='dispatch')
 155 class Preview(ListAPIView):
 156     #queryset = Book.objects.filter(preview=True)
 157     serializer_class = serializers.BookPreviewSerializer
 158
 159     def get_queryset(self):
 160         qs = Book.objects.filter(preview=True)
 161         # FIXME: temporary workaround for a problem with iOS app; see #3954.
 162         if 'Darwin' in self.request.META.get('HTTP_USER_AGENT', '') and 'debug' not in self.request.GET:
 163             qs = qs.none()
 164         return qs
 165
 166
 167 @vary_on_auth  # Because of 'liked'.
 168 class FilterBookList(ListAPIView):
 169     serializer_class = serializers.FilterBookListSerializer
 170
 171     def parse_bool(self, s):
 172         if s in ('true', 'false'):
 173             return s == 'true'
 174         else:
 175             return None
 176
 177     def get_queryset(self):
 178         key_sep = '$'
 179         search_string = self.request.query_params.get('search')
 180         is_lektura = self.parse_bool(self.request.query_params.get('lektura'))
 181         is_audiobook = self.parse_bool(self.request.query_params.get('audiobook'))
 182         preview = self.parse_bool(self.request.query_params.get('preview'))
 183         if not Membership.is_active_for(self.request.user):
 184             preview = False
 185
 186         new_api = self.request.query_params.get('new_api')
 187         after = self.request.query_params.get('after')
 188         count = int(self.request.query_params.get('count', 50))
 189         books = order_books(Book.objects.distinct(), new_api)
 190         if is_lektura is not None:
 191             books = books.filter(has_audience=is_lektura)
 192         if is_audiobook is not None:
 193             if is_audiobook:
 194                 books = books.filter(media__type='mp3')
 195             else:
 196                 books = books.exclude(media__type='mp3')
 197         if preview is not None:
 198             books = books.filter(preview=preview)
 199         for category in book_tag_categories:
 200             category_plural = category + 's'
 201             if category_plural in self.request.query_params:
 202                 slugs = self.request.query_params[category_plural].split(',')
 203                 tags = Tag.objects.filter(category=category, slug__in=slugs)
 204                 books = Book.tagged.with_any(tags, books)
 205         if (search_string is not None) and len(search_string) < 3:
 206             search_string = None
 207         if search_string:
 208             search_string = re_escape(search_string)
 209             books_author = books.filter(cached_author__iregex=r'\m' + search_string)
 210             books_title = books.filter(title__iregex=r'\m' + search_string)
 211             books_title = books_title.exclude(id__in=list(books_author.values_list('id', flat=True)))
 212             if after and (key_sep in after):
 213                 which, key = after.split(key_sep, 1)
 214                 if which == 'title':
 215                     book_lists = [(books_after(books_title, key, new_api), 'title')]
 216                 else:  # which == 'author'
 217                     book_lists = [(books_after(books_author, key, new_api), 'author'), (books_title, 'title')]
 218             else:
 219                 book_lists = [(books_author, 'author'), (books_title, 'title')]
 220         else:
 221             if after and key_sep in after:
 222                 which, key = after.split(key_sep, 1)
 223                 books = books_after(books, key, new_api)
 224             book_lists = [(books, 'book')]
 225
 226         filtered_books = []
 227         for book_list, label in book_lists:
 228             for category in book_tag_categories:
 229                 book_list = prefetch_relations(book_list, category)
 230             remaining_count = count - len(filtered_books)
 231             for book in book_list[:remaining_count]:
 232                 book.key = '%s%s%s' % (
 233                     label, key_sep, book.slug if not new_api else book.full_sort_key())
 234                 filtered_books.append(book)
 235             if len(filtered_books) == count:
 236                 break
 237
 238         return filtered_books
 239
 240
 241 class EpubView(RetrieveAPIView):
 242     queryset = Book.objects.all()
 243     lookup_field = 'slug'
 244     permission_classes = [IsClubMember]
 245
 246     @method_decorator(never_cache)
 247     def get(self, *args, **kwargs):
 248         return HttpResponse(self.get_object().get_media('epub'))
 249
 250
 251 class TagCategoryView(ListAPIView):
 252     serializer_class = serializers.TagSerializer
 253
 254     def get_queryset(self):
 255         category = self.kwargs['category']
 256         tags = Tag.objects.filter(category=category).exclude(items=None).order_by('slug')
 257         if self.request.query_params.get('book_only') == 'true':
 258             tags = tags.filter(for_books=True)
 259         if self.request.GET.get('picture_only') == 'true':
 260             tags = filter(for_pictures=True)
 261
 262         after = self.request.query_params.get('after')
 263         count = self.request.query_params.get('count')
 264         if after:
 265             tags = tags.filter(slug__gt=after)
 266         if count:
 267             tags = tags[:count]
 268
 269         return tags
 270
 271
 272 class TagView(RetrieveAPIView):
 273     serializer_class = serializers.TagDetailSerializer
 274
 275     def get_object(self):
 276         return get_object_or_404(
 277             Tag,
 278             category=self.kwargs['category'],
 279             slug=self.kwargs['slug']
 280         )
 281
 282
 283 @vary_on_auth  # Because of 'liked'.
 284 class FragmentList(ListAPIView):
 285     serializer_class = serializers.FragmentSerializer
 286
 287     def get_queryset(self):
 288         try:
 289             tags, ancestors = read_tags(
 290                 self.kwargs['tags'],
 291                 self.request,
 292                 allowed={'author', 'epoch', 'kind', 'genre', 'book', 'theme'}
 293             )
 294         except ValueError:
 295             raise Http404
 296         return Fragment.tagged.with_all(tags).select_related('book')
 297
 298
 299 @vary_on_auth  # Because of 'liked'.
 300 class FragmentView(RetrieveAPIView):
 301     serializer_class = serializers.FragmentDetailSerializer
 302
 303     def get_object(self):
 304         return get_object_or_404(
 305             Fragment,
 306             book__slug=self.kwargs['book'],
 307             anchor=self.kwargs['anchor']
 308         )