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[wolnelektury.git] / src / catalogue / 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 from collections import OrderedDict
5 import random
6
7 from django.conf import settings
8 from django.http.response import HttpResponseForbidden
9 from django.template.loader import render_to_string
10 from django.shortcuts import get_object_or_404, render, redirect
11 from django.http import HttpResponse, HttpResponseRedirect, Http404, HttpResponsePermanentRedirect
12 from django.urls import reverse
13 from django.db.models import Q, QuerySet
14 from django.contrib.auth.decorators import login_required, user_passes_test
15 from django.utils.http import urlquote_plus
16 from django.utils import translation
17 from django.utils.translation import ugettext as _, ugettext_lazy
18 from django.views.decorators.cache import never_cache
19
20 from ajaxable.utils import AjaxableFormView
21 from club.models import Membership
22 from annoy.models import DynamicTextInsert
23 from pdcounter import views as pdcounter_views
24 from picture.models import Picture, PictureArea
25 from catalogue import constants
26 from catalogue import forms
27 from catalogue.helpers import get_top_level_related_tags
28 from catalogue.models import Book, Collection, Tag, Fragment
29 from catalogue.utils import split_tags
30 from catalogue.models.tag import prefetch_relations
31 from wolnelektury.utils import is_crawler
32
33 staff_required = user_passes_test(lambda user: user.is_staff)
34
35
36 def catalogue(request):
37     return render(request, 'catalogue/catalogue.html', {
38         'books': Book.objects.filter(parent=None),
39         'pictures': Picture.objects.all(),
40         'collections': Collection.objects.all(),
41         'active_menu_item': 'all_works',
42     })
43
44
45 def book_list(request, filters=None, template_name='catalogue/book_list.html',
46               nav_template_name='catalogue/snippets/book_list_nav.html',
47               list_template_name='catalogue/snippets/book_list.html'):
48     """ generates a listing of all books, optionally filtered """
49     books_by_author, orphans, books_by_parent = Book.book_list(filters)
50     books_nav = OrderedDict()
51     for tag in books_by_author:
52         if books_by_author[tag]:
53             books_nav.setdefault(tag.sort_key[0], []).append(tag)
54     return render(request, template_name, {
55         'rendered_nav': render_to_string(nav_template_name, {'books_nav': books_nav}),
56         'rendered_book_list': render_to_string(list_template_name, {
57             'books_by_author': books_by_author,
58             'orphans': orphans,
59             'books_by_parent': books_by_parent,
60         })
61     })
62
63
64 def daisy_list(request):
65     return book_list(request, Q(media__type='daisy'), template_name='catalogue/daisy_list.html')
66
67
68 def collection(request, slug):
69     coll = get_object_or_404(Collection, slug=slug)
70     return render(request, 'catalogue/collection.html', {'collection': coll})
71
72
73 def differentiate_tags(request, tags, ambiguous_slugs):
74     beginning = '/'.join(tag.url_chunk for tag in tags)
75     unparsed = '/'.join(ambiguous_slugs[1:])
76     options = []
77     for tag in Tag.objects.filter(slug=ambiguous_slugs[0]):
78         options.append({
79             'url_args': '/'.join((beginning, tag.url_chunk, unparsed)).strip('/'),
80             'tags': [tag]
81         })
82     return render(
83         request,
84         'catalogue/differentiate_tags.html', {'tags': tags, 'options': options, 'unparsed': ambiguous_slugs[1:]})
85
86
87 def object_list(request, objects, fragments=None, related_tags=None, tags=None, list_type='books', extra=None):
88     if not tags:
89         tags = []
90     tag_ids = [tag.pk for tag in tags]
91
92     related_tag_lists = []
93     if related_tags:
94         related_tag_lists.append(related_tags)
95     else:
96         related_tag_lists.append(
97             Tag.objects.usage_for_queryset(objects, counts=True).exclude(category='set').exclude(pk__in=tag_ids))
98     if not (extra and extra.get('theme_is_set')):
99         if fragments is None:
100             if list_type == 'gallery':
101                 fragments = PictureArea.objects.filter(picture__in=objects)
102             else:
103                 fragments = Fragment.objects.filter(book__in=objects)
104         related_tag_lists.append(
105             Tag.objects.usage_for_queryset(fragments, counts=True).filter(category='theme').exclude(pk__in=tag_ids)
106             .only('name', 'sort_key', 'category', 'slug'))
107         if isinstance(objects, QuerySet):
108             objects = prefetch_relations(objects, 'author')
109
110     categories = split_tags(*related_tag_lists)
111
112     objects = list(objects)
113
114     if not objects and len(tags) == 1 and list_type == 'books':
115         if PictureArea.tagged.with_any(tags).exists() or Picture.tagged.with_any(tags).exists():
116             return redirect('tagged_object_list_gallery', '/'.join(tag.url_chunk for tag in tags))
117
118     if len(objects) > 3:
119         best = random.sample(objects, 3)
120     else:
121         best = objects
122
123     result = {
124         'object_list': objects,
125         'categories': categories,
126         'list_type': list_type,
127         'tags': tags,
128
129         'formats_form': forms.DownloadFormatsForm(),
130         'best': best,
131         'active_menu_item': list_type,
132     }
133     if extra:
134         result.update(extra)
135     return render(
136         request,
137         'catalogue/tagged_object_list.html', result,
138     )
139
140
141 def literature(request):
142     books = Book.objects.filter(parent=None)
143     return object_list(request, books, related_tags=get_top_level_related_tags([]))
144
145
146 def gallery(request):
147     return object_list(request, Picture.objects.all(), list_type='gallery')
148
149
150 def audiobooks(request):
151     audiobooks = Book.objects.filter(media__type__in=('mp3', 'ogg')).distinct()
152     return object_list(request, audiobooks, list_type='audiobooks', extra={
153         'daisy': Book.objects.filter(media__type='daisy').distinct(),
154     })
155
156
157 class ResponseInstead(Exception):
158     def __init__(self, response):
159         super(ResponseInstead, self).__init__()
160         self.response = response
161
162
163 def analyse_tags(request, tag_str):
164     try:
165         tags = Tag.get_tag_list(tag_str)
166     except Tag.DoesNotExist:
167         # Perhaps the user is asking about an author in Public Domain
168         # counter (they are not represented in tags)
169         chunks = tag_str.split('/')
170         if len(chunks) == 2 and chunks[0] == 'autor':
171             raise ResponseInstead(pdcounter_views.author_detail(request, chunks[1]))
172         else:
173             raise Http404
174     except Tag.MultipleObjectsReturned as e:
175         # Ask the user to disambiguate
176         raise ResponseInstead(differentiate_tags(request, e.tags, e.ambiguous_slugs))
177     except Tag.UrlDeprecationWarning as e:
178         raise ResponseInstead(HttpResponsePermanentRedirect(
179             reverse('tagged_object_list', args=['/'.join(tag.url_chunk for tag in e.tags)])))
180
181     try:
182         if len(tags) > settings.MAX_TAG_LIST:
183             raise Http404
184     except AttributeError:
185         pass
186
187     return tags
188
189
190 def theme_list(request, tags, list_type):
191     shelf_tags = [tag for tag in tags if tag.category == 'set']
192     fragment_tags = [tag for tag in tags if tag.category != 'set']
193     if list_type == 'gallery':
194         fragments = PictureArea.tagged.with_all(fragment_tags)
195     else:
196         fragments = Fragment.tagged.with_all(fragment_tags)
197
198     if shelf_tags:
199         # TODO: Pictures on shelves not supported yet.
200         books = Book.tagged.with_all(shelf_tags).order_by()
201         fragments = fragments.filter(Q(book__in=books) | Q(book__ancestor__in=books))
202
203     if not fragments and len(tags) == 1 and list_type == 'books':
204         if PictureArea.tagged.with_any(tags).exists() or Picture.tagged.with_any(tags).exists():
205             return redirect('tagged_object_list_gallery', '/'.join(tag.url_chunk for tag in tags))
206
207     return object_list(request, fragments, tags=tags, list_type=list_type, extra={
208         'theme_is_set': True,
209         'active_menu_item': 'theme',
210     })
211
212
213 def tagged_object_list(request, tags, list_type):
214     try:
215         tags = analyse_tags(request, tags)
216     except ResponseInstead as e:
217         return e.response
218
219     if is_crawler(request) and len(tags) > 1:
220         return HttpResponseForbidden('address removed from crawling. check robots.txt')
221
222     if list_type == 'gallery' and any(tag.category == 'set' for tag in tags):
223         raise Http404
224
225     if any(tag.category in ('theme', 'thing') for tag in tags):
226         return theme_list(request, tags, list_type=list_type)
227
228     if list_type == 'books':
229         books = Book.tagged.with_all(tags)
230
231         if any(tag.category == 'set' for tag in tags):
232             params = {'objects': books}
233         else:
234             params = {
235                 'objects': Book.tagged_top_level(tags),
236                 'fragments': Fragment.objects.filter(book__in=books),
237                 'related_tags': get_top_level_related_tags(tags),
238             }
239     elif list_type == 'gallery':
240         params = {'objects': Picture.tagged.with_all(tags)}
241     elif list_type == 'audiobooks':
242         audiobooks = Book.objects.filter(media__type__in=('mp3', 'ogg')).distinct()
243         params = {
244             'objects': Book.tagged.with_all(tags, audiobooks),
245             'extra': {
246                 'daisy': Book.tagged.with_all(tags, audiobooks.filter(media__type='daisy').distinct()),
247             }
248         }
249     else:
250         raise Http404
251
252     return object_list(request, tags=tags, list_type=list_type, **params)
253
254
255 def book_fragments(request, slug, theme_slug):
256     book = get_object_or_404(Book, slug=slug)
257     theme = get_object_or_404(Tag, slug=theme_slug, category='theme')
258     fragments = Fragment.tagged.with_all([theme]).filter(
259         Q(book=book) | Q(book__ancestor=book))
260
261     return render(
262         request,
263         'catalogue/book_fragments.html',
264         {
265             'book': book,
266             'theme': theme,
267             'fragments': fragments,
268             'active_menu_item': 'books',
269         })
270
271
272 @never_cache
273 def book_detail(request, slug):
274     try:
275         book = Book.objects.get(slug=slug)
276     except Book.DoesNotExist:
277         return pdcounter_views.book_stub_detail(request, slug)
278
279     return render(
280         request,
281         'catalogue/book_detail.html',
282         {
283             'book': book,
284             'book_children': book.children.all().order_by('parent_number', 'sort_key'),
285             'active_menu_item': 'books',
286         })
287
288
289 # używane w publicznym interfejsie
290 def player(request, slug):
291     book = get_object_or_404(Book, slug=slug)
292     if not book.has_media('mp3'):
293         raise Http404
294
295     audiobooks, projects = book.get_audiobooks()
296
297     return render(
298         request,
299         'catalogue/player.html',
300         {
301             'book': book,
302             'audiobook': '',
303             'audiobooks': audiobooks,
304             'projects': projects,
305         })
306
307
308 def book_text(request, slug):
309     book = get_object_or_404(Book, slug=slug)
310
311     if book.preview and not Membership.is_active_for(request.user):
312         return HttpResponseRedirect(book.get_absolute_url())
313
314     if not book.has_html_file():
315         raise Http404
316     with book.html_file.open('r') as f:
317         book_text = f.read()
318
319     return render(request, 'catalogue/book_text.html', {
320         'book': book,
321         'book_text': book_text,
322         'inserts': DynamicTextInsert.objects.all()
323     })
324
325
326 # =========
327 # = Admin =
328 # =========
329 @login_required
330 @staff_required
331 def import_book(request):
332     """docstring for import_book"""
333     book_import_form = forms.BookImportForm(request.POST, request.FILES)
334     if book_import_form.is_valid():
335         try:
336             book_import_form.save()
337         except:
338             import sys
339             import pprint
340             import traceback
341             info = sys.exc_info()
342             exception = pprint.pformat(info[1])
343             tb = '\n'.join(traceback.format_tb(info[2]))
344             return HttpResponse(
345                     _("An error occurred: %(exception)s\n\n%(tb)s") % {'exception': exception, 'tb': tb},
346                     mimetype='text/plain')
347         return HttpResponse(_("Book imported successfully"))
348     else:
349         return HttpResponse(_("Error importing file: %r") % book_import_form.errors)
350
351
352 # info views for API
353
354 def book_info(request, book_id, lang='pl'):
355     book = get_object_or_404(Book, id=book_id)
356     # set language by hand
357     translation.activate(lang)
358     return render(request, 'catalogue/book_info.html', {'book': book})
359
360
361 def tag_info(request, tag_id):
362     tag = get_object_or_404(Tag, id=tag_id)
363     return HttpResponse(tag.description)
364
365
366 @never_cache
367 def embargo_link(request, key, format_, slug):
368     book = get_object_or_404(Book, slug=slug)
369     if format_ not in Book.formats:
370         raise Http404
371     if key != book.preview_key:
372         raise Http404
373     media_file = book.get_media(format_)
374     if not book.preview:
375         return HttpResponseRedirect(media_file.url)
376     return HttpResponse(media_file, content_type=constants.EBOOK_CONTENT_TYPES[format_])
377
378
379 def download_zip(request, format, slug=None):
380     if format in Book.ebook_formats:
381         url = Book.zip_format(format)
382     elif format in ('mp3', 'ogg') and slug is not None:
383         book = get_object_or_404(Book, slug=slug)
384         url = book.zip_audiobooks(format)
385     else:
386         raise Http404('No format specified for zip package')
387     return HttpResponseRedirect(urlquote_plus(settings.MEDIA_URL + url, safe='/?='))
388
389
390 class CustomPDFFormView(AjaxableFormView):
391     form_class = forms.CustomPDFForm
392     title = ugettext_lazy('Download custom PDF')
393     submit = ugettext_lazy('Download')
394     template = 'catalogue/custom_pdf_form.html'
395     honeypot = True
396
397     def __call__(self, *args, **kwargs):
398         if settings.NO_CUSTOM_PDF:
399             raise Http404('Custom PDF is disabled')
400         return super(CustomPDFFormView, self).__call__(*args, **kwargs)
401
402     def form_args(self, request, obj):
403         """Override to parse view args and give additional args to the form."""
404         return (obj,), {}
405
406     def validate_object(self, obj, request):
407         book = obj
408         if book.preview and not Membership_is_active_for(request.user):
409             return HttpResponseRedirect(book.get_absolute_url())
410         return super(CustomPDFFormView, self).validate_object(obj, request)
411
412     def get_object(self, request, slug, *args, **kwargs):
413         book = get_object_or_404(Book, slug=slug)
414         return book
415
416     def context_description(self, request, obj):
417         return obj.pretty_title()
418
419
420 def tag_catalogue(request, category):
421     if category == 'theme':
422         tags = Tag.objects.usage_for_model(
423             Fragment, counts=True).filter(category='theme')
424     else:
425         tags = list(get_top_level_related_tags((), categories=(category,)))
426
427     described_tags = [tag for tag in tags if tag.description]
428
429     if len(described_tags) > 4:
430         best = random.sample(described_tags, 4)
431     else:
432         best = described_tags
433
434     return render(request, 'catalogue/tag_catalogue.html', {
435         'tags': tags,
436         'best': best,
437         'title': constants.CATEGORIES_NAME_PLURAL[category],
438         'whole_category': constants.WHOLE_CATEGORY[category],
439         'active_menu_item': 'theme' if category == 'theme' else None,
440     })
441
442
443 def collections(request):
444     objects = Collection.objects.all()
445
446     if len(objects) > 3:
447         best = random.sample(list(objects), 3)
448     else:
449         best = objects
450
451     return render(request, 'catalogue/collections.html', {
452         'objects': objects,
453         'best': best,
454     })
455
456
457 def ridero_cover(request, slug):
458     from librarian.cover import make_cover
459     wldoc = Book.objects.get(slug=slug).wldocument()
460     cover = make_cover(wldoc.book_info, width=980, bleed=20, format='PNG')
461     response = HttpResponse(content_type="image/png")
462     cover.save(response)
463     return response
464
465
466 def get_isbn(request, book_format, slug):
467     book = Book.objects.get(slug=slug)
468     return HttpResponse(book.get_extra_info_json().get('isbn_%s' % book_format))