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