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
  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         # Permission needed.
  94         data = json.loads(request.POST.get('data'))
  95         form = BookImportForm(data)
  96         if form.is_valid():
  97             form.save()
  98             return Response({}, status=status.HTTP_201_CREATED)
  99         else:
 100             raise Http404
 101
 102
 103 @vary_on_auth  # Because of 'liked'.
 104 class BookDetail(RetrieveAPIView):
 105     queryset = Book.objects.all()
 106     lookup_field = 'slug'
 107     serializer_class = serializers.BookDetailSerializer
 108
 109
 110 class EbookList(BookList):
 111     serializer_class = serializers.EbookSerializer
 112
 113
 114 @vary_on_auth  # Because of 'liked'.
 115 class Preview(ListAPIView):
 116     queryset = Book.objects.filter(preview=True)
 117     serializer_class = serializers.BookPreviewSerializer
 118
 119
 120 @vary_on_auth  # Because of 'liked'.
 121 class FilterBookList(ListAPIView):
 122     serializer_class = serializers.FilterBookListSerializer
 123
 124     def parse_bool(self, s):
 125         if s in ('true', 'false'):
 126             return s == 'true'
 127         else:
 128             return None
 129
 130     def get_queryset(self):
 131         key_sep = '$'
 132         search_string = self.request.query_params.get('search')
 133         is_lektura = self.parse_bool(self.request.query_params.get('lektura'))
 134         is_audiobook = self.parse_bool(self.request.query_params.get('audiobook'))
 135         preview = self.parse_bool(self.request.query_params.get('preview'))
 136
 137         new_api = self.request.query_params.get('new_api')
 138         after = self.request.query_params.get('after')
 139         count = int(self.request.query_params.get('count', 50))
 140         books = order_books(Book.objects.distinct(), new_api)
 141         if is_lektura is not None:
 142             books = books.filter(has_audience=is_lektura)
 143         if is_audiobook is not None:
 144             if is_audiobook:
 145                 books = books.filter(media__type='mp3')
 146             else:
 147                 books = books.exclude(media__type='mp3')
 148         if preview is not None:
 149             books = books.filter(preview=preview)
 150         for category in book_tag_categories:
 151             category_plural = category + 's'
 152             if category_plural in self.request.query_params:
 153                 slugs = self.request.query_params[category_plural].split(',')
 154                 tags = Tag.objects.filter(category=category, slug__in=slugs)
 155                 books = Book.tagged.with_any(tags, books)
 156         if (search_string is not None) and len(search_string) < 3:
 157             search_string = None
 158         if search_string:
 159             search_string = re_escape(search_string)
 160             books_author = books.filter(cached_author__iregex=r'\m' + search_string)
 161             books_title = books.filter(title__iregex=r'\m' + search_string)
 162             books_title = books_title.exclude(id__in=list(books_author.values_list('id', flat=True)))
 163             if after and (key_sep in after):
 164                 which, key = after.split(key_sep, 1)
 165                 if which == 'title':
 166                     book_lists = [(books_after(books_title, key, new_api), 'title')]
 167                 else:  # which == 'author'
 168                     book_lists = [(books_after(books_author, key, new_api), 'author'), (books_title, 'title')]
 169             else:
 170                 book_lists = [(books_author, 'author'), (books_title, 'title')]
 171         else:
 172             if after and key_sep in after:
 173                 which, key = after.split(key_sep, 1)
 174                 books = books_after(books, key, new_api)
 175             book_lists = [(books, 'book')]
 176
 177         filtered_books = []
 178         for book_list, label in book_lists:
 179             for category in book_tag_categories:
 180                 book_list = prefetch_relations(book_list, category)
 181             remaining_count = count - len(filtered_books)
 182             for book in book_list[:remaining_count]:
 183                 book.key = '%s%s%s' % (
 184                     label, key_sep, book.slug if not new_api else book.full_sort_key())
 185                 filtered_books.append(book)
 186             if len(filtered_books) == count:
 187                 break
 188
 189         return filtered_books
 190
 191
 192 class EpubView(RetrieveAPIView):
 193     queryset = Book.objects.all()
 194     lookup_field = 'slug'
 195     permission_classes = [IsSubscribed]
 196
 197     def get(self, *args, **kwargs):
 198         return HttpResponse(self.get_object().get_media('epub'))
 199
 200
 201 class TagCategoryView(ListAPIView):
 202     serializer_class = serializers.TagSerializer
 203
 204     def get_queryset(self):
 205         category = self.kwargs['category']
 206         tags = Tag.objects.filter(category=category).exclude(items=None).order_by('slug')
 207         if self.request.query_params.get('book_only') == 'true':
 208             tags = tags.filter(for_books=True)
 209         if self.request.GET.get('picture_only') == 'true':
 210             tags = filter(for_pictures=True)
 211
 212         after = self.request.query_params.get('after')
 213         count = self.request.query_params.get('count')
 214         if after:
 215             tags = tags.filter(slug__gt=after)
 216         if count:
 217             tags = tags[:count]
 218
 219         return tags
 220
 221
 222 class TagView(RetrieveAPIView):
 223     serializer_class = serializers.TagDetailSerializer
 224
 225     def get_object(self):
 226         return get_object_or_404(
 227             Tag,
 228             category=self.kwargs['category'],
 229             slug=self.kwargs['slug']
 230         )
 231
 232
 233 @vary_on_auth  # Because of 'liked'.
 234 class FragmentList(ListAPIView):
 235     serializer_class = serializers.FragmentSerializer
 236
 237     def get_queryset(self):
 238         try:
 239             tags, ancestors = read_tags(
 240                 self.kwargs['tags'],
 241                 self.request,
 242                 allowed={'author', 'epoch', 'kind', 'genre', 'book', 'theme'}
 243             )
 244         except ValueError:
 245             raise Http404
 246         return Fragment.tagged.with_all(tags).select_related('book')
 247
 248
 249 @vary_on_auth  # Because of 'liked'.
 250 class FragmentView(RetrieveAPIView):
 251     serializer_class = serializers.FragmentDetailSerializer
 252
 253     def get_object(self):
 254         return get_object_or_404(
 255             Fragment,
 256             book__slug=self.kwargs['book'],
 257             anchor=self.kwargs['anchor']
 258         )