faeeb3c087cea5d4bb6754721721863e8a447acc
[wolnelektury.git] / 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 import os.path
6 from django.conf import settings
7 from django.http import Http404, HttpResponse
8 from django.utils.decorators import method_decorator
9 from django.views.decorators.cache import never_cache
10 from rest_framework.generics import ListAPIView, RetrieveAPIView, get_object_or_404
11 from rest_framework.permissions import DjangoModelPermissionsOrAnonReadOnly
12 from rest_framework.response import Response
13 from rest_framework import status
14 from api.handlers import read_tags
15 from api.utils import vary_on_auth
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.models import Membership
20 from club.permissions import IsClubMember
21 from wolnelektury.utils import re_escape
22 from .helpers import books_after, order_books
23 from . import serializers
24
25
26 book_tag_categories = ['author', 'epoch', 'kind', 'genre']
27
28
29 class CollectionList(ListAPIView):
30     queryset = Collection.objects.all()
31     serializer_class = serializers.CollectionListSerializer
32
33
34 @vary_on_auth  # Because of 'liked'.
35 class CollectionDetail(RetrieveAPIView):
36     queryset = Collection.objects.all()
37     lookup_field = 'slug'
38     serializer_class = serializers.CollectionSerializer
39
40
41 @vary_on_auth  # Because of 'liked'.
42 class BookList(ListAPIView):
43     permission_classes = [DjangoModelPermissionsOrAnonReadOnly]
44     queryset = Book.objects.none()  # Required for DjangoModelPermissions
45     serializer_class = serializers.BookListSerializer
46
47     def get(self, request, filename=None, **kwargs):
48         if filename and not kwargs.get('tags') and 'count' not in request.query_params:
49             try:
50                 with open(os.path.join(settings.MEDIA_ROOT, 'api', '%s.%s' % (filename, request.accepted_renderer.format)), 'rb') as f:
51                     content = f.read()
52                 return HttpResponse(content, content_type=request.accepted_media_type)
53             except:
54                 pass
55         return super().get(request, filename=filename, **kwargs)
56
57     def get_queryset(self):
58         try:
59             tags, ancestors = read_tags(
60                 self.kwargs.get('tags', ''), self.request,
61                 allowed=('author', 'epoch', 'kind', 'genre')
62             )
63         except ValueError:
64             raise Http404
65
66         new_api = self.request.query_params.get('new_api')
67         after = self.request.query_params.get('after', self.kwargs.get('after'))
68         count = self.request.query_params.get('count', self.kwargs.get('count'))
69         if count:
70             try:
71                 count = int(count)
72             except TypeError:
73                 raise Http404  # Fixme
74
75         if tags:
76             if self.kwargs.get('top_level'):
77                 books = Book.tagged_top_level(tags)
78                 if not books:
79                     raise Http404
80                 return books
81             else:
82                 books = Book.tagged.with_all(tags)
83         else:
84             books = Book.objects.all()
85         books = books.filter(findable=True)
86         books = order_books(books, new_api)
87
88         if not Membership.is_active_for(self.request.user):
89             books = books.exclude(preview=True)
90
91         if self.kwargs.get('top_level'):
92             books = books.filter(parent=None)
93         if self.kwargs.get('audiobooks'):
94             books = books.filter(media__type='mp3').distinct()
95         if self.kwargs.get('daisy'):
96             books = books.filter(media__type='daisy').distinct()
97         if self.kwargs.get('recommended'):
98             books = books.filter(recommended=True)
99         if self.kwargs.get('newest'):
100             books = books.order_by('-created_at')
101
102         if after:
103             books = books_after(books, after, new_api)
104
105         prefetch_relations(books, 'author')
106         prefetch_relations(books, 'genre')
107         prefetch_relations(books, 'kind')
108         prefetch_relations(books, 'epoch')
109
110         if count:
111             books = books[:count]
112
113         return books
114
115     def post(self, request, **kwargs):
116         if kwargs.get('audiobooks'):
117             return self.post_audiobook(request, **kwargs)
118         else:
119             return self.post_book(request, **kwargs)
120
121     def post_book(self, request, **kwargs):
122         data = json.loads(request.POST.get('data'))
123         form = BookImportForm(data)
124         if form.is_valid():
125             form.save()
126             return Response({}, status=status.HTTP_201_CREATED)
127         else:
128             raise Http404
129
130     def post_audiobook(self, request, **kwargs):
131         index = int(request.POST['part_index'])
132         parts_count = int(request.POST['parts_count'])
133         media_type = request.POST['type'].lower()
134         source_sha1 = request.POST.get('source_sha1')
135         name = request.POST.get('name', '')
136         part_name = request.POST.get('part_name', '')
137
138         project_data = request.POST.get('project', {})
139         project_description = project_data.get('description', '')
140         project_icon = project_data.get('icon', '')
141
142         _rest, slug = request.POST['book'].rstrip('/').rsplit('/', 1)
143         book = Book.objects.get(slug=slug)
144
145         try:
146             assert source_sha1
147             bm = book.media.get(type=media_type, source_sha1=source_sha1)
148         except (AssertionError, BookMedia.DoesNotExist):
149             bm = BookMedia(book=book, type=media_type)
150         bm.name = name
151         bm.part_name = part_name
152         bm.index = index
153         bm.project_description = project_description
154         bm.project_icon = project_icon
155         bm.file.save(None, request.data['file'], save=False)
156         bm.save(parts_count=parts_count)
157
158         return Response({}, status=status.HTTP_201_CREATED)
159
160
161 @vary_on_auth  # Because of 'liked'.
162 class BookDetail(RetrieveAPIView):
163     queryset = Book.objects.all()
164     lookup_field = 'slug'
165     serializer_class = serializers.BookDetailSerializer
166
167
168 @vary_on_auth  # Because of embargo links.
169 class EbookList(BookList):
170     serializer_class = serializers.EbookSerializer
171
172
173 @method_decorator(never_cache, name='dispatch')
174 class Preview(ListAPIView):
175     #queryset = Book.objects.filter(preview=True)
176     serializer_class = serializers.BookPreviewSerializer
177
178     def get_queryset(self):
179         qs = Book.objects.filter(preview=True)
180         # FIXME: temporary workaround for a problem with iOS app; see #3954.
181         if 'Darwin' in self.request.META.get('HTTP_USER_AGENT', '') and 'debug' not in self.request.GET:
182             qs = qs.none()
183         return qs
184
185
186 @vary_on_auth  # Because of 'liked'.
187 class FilterBookList(ListAPIView):
188     serializer_class = serializers.FilterBookListSerializer
189
190     def parse_bool(self, s):
191         if s in ('true', 'false'):
192             return s == 'true'
193         else:
194             return None
195
196     def get_queryset(self):
197         key_sep = '$'
198         search_string = self.request.query_params.get('search')
199         is_lektura = self.parse_bool(self.request.query_params.get('lektura'))
200         is_audiobook = self.parse_bool(self.request.query_params.get('audiobook'))
201         preview = self.parse_bool(self.request.query_params.get('preview'))
202         if not Membership.is_active_for(self.request.user):
203             preview = False
204
205         new_api = self.request.query_params.get('new_api')
206         after = self.request.query_params.get('after')
207         count = int(self.request.query_params.get('count', 50))
208         books = order_books(Book.objects.distinct(), new_api)
209         books = books.filter(findable=True)
210         if is_lektura is not None:
211             books = books.filter(has_audience=is_lektura)
212         if is_audiobook is not None:
213             if is_audiobook:
214                 books = books.filter(media__type='mp3')
215             else:
216                 books = books.exclude(media__type='mp3')
217         if preview is not None:
218             books = books.filter(preview=preview)
219         for category in book_tag_categories:
220             category_plural = category + 's'
221             if category_plural in self.request.query_params:
222                 slugs = self.request.query_params[category_plural].split(',')
223                 tags = Tag.objects.filter(category=category, slug__in=slugs)
224                 books = Book.tagged.with_any(tags, books)
225         if (search_string is not None) and len(search_string) < 3:
226             search_string = None
227         if search_string:
228             search_string = re_escape(search_string)
229             books_author = books.filter(cached_author__iregex=r'\m' + search_string)
230             books_title = books.filter(title__iregex=r'\m' + search_string)
231             books_title = books_title.exclude(id__in=list(books_author.values_list('id', flat=True)))
232             if after and (key_sep in after):
233                 which, key = after.split(key_sep, 1)
234                 if which == 'title':
235                     book_lists = [(books_after(books_title, key, new_api), 'title')]
236                 else:  # which == 'author'
237                     book_lists = [(books_after(books_author, key, new_api), 'author'), (books_title, 'title')]
238             else:
239                 book_lists = [(books_author, 'author'), (books_title, 'title')]
240         else:
241             if after and key_sep in after:
242                 which, key = after.split(key_sep, 1)
243                 books = books_after(books, key, new_api)
244             book_lists = [(books, 'book')]
245
246         filtered_books = []
247         for book_list, label in book_lists:
248             for category in book_tag_categories:
249                 book_list = prefetch_relations(book_list, category)
250             remaining_count = count - len(filtered_books)
251             for book in book_list[:remaining_count]:
252                 book.key = '%s%s%s' % (
253                     label, key_sep, book.slug if not new_api else book.full_sort_key())
254                 filtered_books.append(book)
255             if len(filtered_books) == count:
256                 break
257
258         return filtered_books
259
260
261 class EpubView(RetrieveAPIView):
262     queryset = Book.objects.all()
263     lookup_field = 'slug'
264     permission_classes = [IsClubMember]
265
266     @method_decorator(never_cache)
267     def get(self, *args, **kwargs):
268         return HttpResponse(self.get_object().get_media('epub'))
269
270
271 class TagCategoryView(ListAPIView):
272     serializer_class = serializers.TagSerializer
273
274     def get_queryset(self):
275         category = self.kwargs['category']
276         tags = Tag.objects.filter(category=category).exclude(items=None).order_by('slug')
277         if self.request.query_params.get('book_only') == 'true':
278             tags = tags.filter(for_books=True)
279         if self.request.GET.get('picture_only') == 'true':
280             tags = filter(for_pictures=True)
281
282         after = self.request.query_params.get('after')
283         count = self.request.query_params.get('count')
284         if after:
285             tags = tags.filter(slug__gt=after)
286         if count:
287             tags = tags[:count]
288
289         return tags
290
291
292 class TagView(RetrieveAPIView):
293     serializer_class = serializers.TagDetailSerializer
294
295     def get_object(self):
296         return get_object_or_404(
297             Tag,
298             category=self.kwargs['category'],
299             slug=self.kwargs['slug']
300         )
301
302
303 @vary_on_auth  # Because of 'liked'.
304 class FragmentList(ListAPIView):
305     serializer_class = serializers.FragmentSerializer
306
307     def get_queryset(self):
308         try:
309             tags, ancestors = read_tags(
310                 self.kwargs['tags'],
311                 self.request,
312                 allowed={'author', 'epoch', 'kind', 'genre', 'book', 'theme'}
313             )
314         except ValueError:
315             raise Http404
316         return Fragment.tagged.with_all(tags).filter(book__findable=True).select_related('book')
317
318
319 @vary_on_auth  # Because of 'liked'.
320 class FragmentView(RetrieveAPIView):
321     serializer_class = serializers.FragmentDetailSerializer
322
323     def get_object(self):
324         return get_object_or_404(
325             Fragment,
326             book__slug=self.kwargs['book'],
327             anchor=self.kwargs['anchor']
328         )