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