e2d449c30783364adabce711c76e11c2a43ec08d
[wolnelektury.git] / src / catalogue / 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 from collections import OrderedDict
6 import re
7 import random
8
9 from django.conf import settings
10 from django.template import RequestContext
11 from django.template.loader import render_to_string
12 from django.shortcuts import render_to_response, get_object_or_404, render, redirect
13 from django.http import HttpResponse, HttpResponseRedirect, Http404, HttpResponsePermanentRedirect, JsonResponse
14 from django.core.urlresolvers import reverse
15 from django.db.models import Q
16 from django.contrib.auth.decorators import login_required, user_passes_test
17 from django.utils.http import urlquote_plus
18 from django.utils import translation
19 from django.utils.translation import ugettext as _, ugettext_lazy
20
21 from ajaxable.utils import AjaxableFormView
22 from pdcounter.models import BookStub, Author
23 from pdcounter import views as pdcounter_views
24 from picture.models import Picture, PictureArea
25 from ssify import ssi_included, ssi_expect, SsiVariable as Var
26 from suggest.forms import PublishingSuggestForm
27 from catalogue import constants
28 from catalogue import forms
29 from catalogue.helpers import get_top_level_related_tags
30 from catalogue.models import Book, Collection, Tag, Fragment
31 from catalogue.utils import split_tags
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).order_by('sort_key_author', 'sort_key'),
39         'pictures': Picture.objects.order_by('sort_key_author', 'sort_key'),
40         'collections': Collection.objects.all(),
41     })
42
43
44 def book_list(request, filter=None, get_filter=None, template_name='catalogue/book_list.html',
45               nav_template_name='catalogue/snippets/book_list_nav.html',
46               list_template_name='catalogue/snippets/book_list.html', context=None):
47     """ generates a listing of all books, optionally filtered with a test function """
48     if get_filter:
49         filter = get_filter()
50     books_by_author, orphans, books_by_parent = Book.book_list(filter)
51     books_nav = OrderedDict()
52     for tag in books_by_author:
53         if books_by_author[tag]:
54             books_nav.setdefault(tag.sort_key[0], []).append(tag)
55     # WTF: dlaczego nie include?
56     return render_to_response(template_name, {
57         'rendered_nav': render_to_string(nav_template_name, {'books_nav': books_nav}),
58         'rendered_book_list': render_to_string(list_template_name, {
59             'books_by_author': books_by_author,
60             'orphans': orphans,
61             'books_by_parent': books_by_parent,
62         })
63     }, context_instance=RequestContext(request))
64
65
66 def audiobook_list(request):
67     books = Book.objects.filter(media__type__in=('mp3', 'ogg')).distinct().order_by(
68         'sort_key_author', 'sort_key')
69     books = list(books)
70     if len(books) > 3:
71         best = random.sample(books, 3)
72     else:
73         best = books
74
75     daisy = Book.objects.filter(media__type='daisy').distinct().order_by('sort_key_author', 'sort_key')
76
77     return render(request, 'catalogue/audiobook_list.html', {
78         'books': books,
79         'best': best,
80         'daisy': daisy,
81         })
82
83
84 def daisy_list(request):
85     return book_list(request, Q(media__type='daisy'),
86                      template_name='catalogue/daisy_list.html',
87                      )
88
89
90 def collection(request, slug):
91     coll = get_object_or_404(Collection, slug=slug)
92     return render(request, 'catalogue/collection.html', {'collection': coll})
93
94
95 def differentiate_tags(request, tags, ambiguous_slugs):
96     beginning = '/'.join(tag.url_chunk for tag in tags)
97     unparsed = '/'.join(ambiguous_slugs[1:])
98     options = []
99     for tag in Tag.objects.filter(slug=ambiguous_slugs[0]):
100         options.append({
101             'url_args': '/'.join((beginning, tag.url_chunk, unparsed)).strip('/'),
102             'tags': [tag]
103         })
104     return render_to_response(
105         'catalogue/differentiate_tags.html', {'tags': tags, 'options': options, 'unparsed': ambiguous_slugs[1:]},
106         context_instance=RequestContext(request))
107
108
109 # TODO: Rewrite this hellish piece of code which tries to do everything
110 def tagged_object_list(request, tags='', list_type='default'):
111     raw_tags = tags
112     # preliminary tests and conditions
113     gallery = list_type == 'gallery'
114     audiobooks = list_type == 'audiobooks'
115     try:
116         tags = Tag.get_tag_list(tags)
117     except Tag.DoesNotExist:
118         # Perhaps the user is asking about an author in Public Domain
119         # counter (they are not represented in tags)
120         chunks = tags.split('/')
121         if len(chunks) == 2 and chunks[0] == 'autor':
122             return pdcounter_views.author_detail(request, chunks[1])
123         else:
124             raise Http404
125     except Tag.MultipleObjectsReturned, e:
126         # Ask the user to disambiguate
127         return differentiate_tags(request, e.tags, e.ambiguous_slugs)
128     except Tag.UrlDeprecationWarning, e:
129         return HttpResponsePermanentRedirect(
130             reverse('tagged_object_list', args=['/'.join(tag.url_chunk for tag in e.tags)]))
131
132     try:
133         if len(tags) > settings.MAX_TAG_LIST:
134             raise Http404
135     except AttributeError:
136         pass
137
138     # beginning of digestion
139     theme_is_set = any(tag.category == 'theme' for tag in tags)
140     shelf_is_set = any(tag.category == 'set' for tag in tags)
141     only_shelf = shelf_is_set and len(tags) == 1
142     only_my_shelf = only_shelf and request.user == tags[0].user
143     tags_pks = [tag.pk for tag in tags]
144
145     if gallery and shelf_is_set:
146         raise Http404
147
148     daisy = None
149     if theme_is_set:
150         # Only fragments (or pirctureareas) here.
151         shelf_tags = [tag for tag in tags if tag.category == 'set']
152         fragment_tags = [tag for tag in tags if tag.category != 'set']
153         if gallery:
154             fragments = PictureArea.tagged.with_all(fragment_tags)
155         else:
156             fragments = Fragment.tagged.with_all(fragment_tags)
157
158         if shelf_tags:
159             # TODO: Pictures on shelves not supported yet.
160             books = Book.tagged.with_all(shelf_tags).order_by()
161             fragments = fragments.filter(Q(book__in=books) | Q(book__ancestor__in=books))
162
163         categories = split_tags(
164             Tag.objects.usage_for_queryset(fragments, counts=True).exclude(pk__in=tags_pks),
165         )
166
167         objects = fragments
168     else:
169         if gallery:
170             # TODO: Pictures on shelves not supported yet.
171             if tags:
172                 objects = Picture.tagged.with_all(tags)
173             else:
174                 objects = Picture.objects.all()
175             areas = PictureArea.objects.filter(picture__in=objects)
176             categories = split_tags(
177                 Tag.objects.usage_for_queryset(
178                     objects, counts=True).exclude(pk__in=tags_pks),
179                 Tag.objects.usage_for_queryset(
180                     areas, counts=True).filter(
181                     category__in=('theme', 'thing')).exclude(
182                     pk__in=tags_pks),
183             )
184         else:
185             if audiobooks:
186                 all_books = Book.objects.filter(media__type__in=('mp3', 'ogg')).distinct()
187                 if tags:
188                     all_books = Book.tagged.with_all(tags, all_books)
189                 objects = all_books
190                 # there's never only the daisy audiobook
191                 daisy = objects.filter(media__type='daisy').distinct().order_by('sort_key_author', 'sort_key')
192                 related_book_tags = Tag.objects.usage_for_queryset(
193                     objects, counts=True).exclude(
194                     category='set').exclude(pk__in=tags_pks)
195             else:
196                 if tags:
197                     all_books = Book.tagged.with_all(tags)
198                 else:
199                     all_books = Book.objects.filter(parent=None)
200                 if shelf_is_set:
201                     objects = all_books
202                     related_book_tags = Tag.objects.usage_for_queryset(
203                         objects, counts=True).exclude(
204                         category='set').exclude(pk__in=tags_pks)
205                 else:
206                     if tags:
207                         objects = Book.tagged_top_level(tags)
208                     else:
209                         objects = all_books
210                     related_book_tags = get_top_level_related_tags(tags)
211
212             fragments = Fragment.objects.filter(book__in=all_books)
213
214             categories = split_tags(
215                 related_book_tags,
216                 Tag.objects.usage_for_queryset(
217                     fragments, counts=True).filter(
218                     category='theme').exclude(pk__in=tags_pks),
219             )
220         objects = objects.order_by('sort_key_author', 'sort_key')
221
222     objects = list(objects)
223     if len(objects) > 3:
224         best = random.sample(objects, 3)
225     else:
226         best = objects
227
228     if not gallery and not objects and len(tags) == 1:
229         tag = tags[0]
230         if tag.category in ('theme', 'thing') and (
231                 PictureArea.tagged.with_any([tag]).exists() or
232                 Picture.tagged.with_any([tag]).exists()):
233             return redirect('tagged_object_list_gallery', raw_tags)
234
235     return render_to_response(
236         'catalogue/tagged_object_list.html',
237         {
238             'object_list': objects,
239             'categories': categories,
240             'only_shelf': only_shelf,
241             'only_my_shelf': only_my_shelf,
242             'formats_form': forms.DownloadFormatsForm(),
243             'tags': tags,
244             'tag_ids': tags_pks,
245             'theme_is_set': theme_is_set,
246             'best': best,
247             'list_type': list_type,
248             'daisy': daisy,
249         },
250         context_instance=RequestContext(request))
251
252
253 def book_fragments(request, slug, theme_slug):
254     book = get_object_or_404(Book, slug=slug)
255     theme = get_object_or_404(Tag, slug=theme_slug, category='theme')
256     fragments = Fragment.tagged.with_all([theme]).filter(
257         Q(book=book) | Q(book__ancestor=book))
258
259     return render_to_response('catalogue/book_fragments.html', {
260         'book': book,
261         'theme': theme,
262         'fragments': fragments,
263     }, context_instance=RequestContext(request))
264
265
266 def book_detail(request, slug):
267     try:
268         book = Book.objects.get(slug=slug)
269     except Book.DoesNotExist:
270         return pdcounter_views.book_stub_detail(request, slug)
271
272     return render_to_response('catalogue/book_detail.html', {
273         'book': book,
274         'tags': book.tags.exclude(category__in=('set', 'theme')),
275         'book_children': book.children.all().order_by('parent_number', 'sort_key'),
276     }, context_instance=RequestContext(request))
277
278
279 def get_audiobooks(book):
280     ogg_files = {}
281     for m in book.media.filter(type='ogg').order_by().iterator():
282         ogg_files[m.name] = m
283
284     audiobooks = []
285     have_oggs = True
286     projects = set()
287     for mp3 in book.media.filter(type='mp3').iterator():
288         # ogg files are always from the same project
289         meta = mp3.extra_info
290         project = meta.get('project')
291         if not project:
292             # temporary fallback
293             project = u'CzytamySłuchając'
294
295         projects.add((project, meta.get('funded_by', '')))
296
297         media = {'mp3': mp3}
298
299         ogg = ogg_files.get(mp3.name)
300         if ogg:
301             media['ogg'] = ogg
302         else:
303             have_oggs = False
304         audiobooks.append(media)
305
306     projects = sorted(projects)
307     return audiobooks, projects, have_oggs
308
309
310 # używane tylko do audiobook_tree, które jest używane tylko w snippets/audiobook_list.html, które nie jest używane
311 def player(request, slug):
312     book = get_object_or_404(Book, slug=slug)
313     if not book.has_media('mp3'):
314         raise Http404
315
316     audiobooks, projects, have_oggs = get_audiobooks(book)
317
318     # extra_info = book.extra_info
319
320     return render_to_response('catalogue/player.html', {
321         'book': book,
322         'audiobook': '',
323         'audiobooks': audiobooks,
324         'projects': projects,
325     }, context_instance=RequestContext(request))
326
327
328 def book_text(request, slug):
329     book = get_object_or_404(Book, slug=slug)
330
331     if not book.has_html_file():
332         raise Http404
333     return render_to_response('catalogue/book_text.html', {'book': book,}, context_instance=RequestContext(request))
334
335
336 # ==========
337 # = Search =
338 # ==========
339
340 def _no_diacritics_regexp(query):
341     """ returns a regexp for searching for a query without diacritics
342
343     should be locale-aware """
344     names = {
345         u'a': u'aąĄ', u'c': u'cćĆ', u'e': u'eęĘ', u'l': u'lłŁ', u'n': u'nńŃ', u'o': u'oóÓ', u's': u'sśŚ',
346         u'z': u'zźżŹŻ',
347         u'ą': u'ąĄ', u'ć': u'ćĆ', u'ę': u'ęĘ', u'ł': u'łŁ', u'ń': u'ńŃ', u'ó': u'óÓ', u'ś': u'śŚ', u'ź': u'źŹ',
348         u'ż': u'żŻ'
349         }
350
351     def repl(m):
352         l = m.group()
353         return u"(%s)" % '|'.join(names[l])
354
355     return re.sub(u'[%s]' % (u''.join(names.keys())), repl, query)
356
357
358 def unicode_re_escape(query):
359     """ Unicode-friendly version of re.escape """
360     return re.sub(r'(?u)(\W)', r'\\\1', query)
361
362
363 def _word_starts_with(name, prefix):
364     """returns a Q object getting models having `name` contain a word
365     starting with `prefix`
366
367     We define word characters as alphanumeric and underscore, like in JS.
368
369     Works for MySQL, PostgreSQL, Oracle.
370     For SQLite, _sqlite* version is substituted for this.
371     """
372     kwargs = {}
373
374     prefix = _no_diacritics_regexp(unicode_re_escape(prefix))
375     # can't use [[:<:]] (word start),
376     # but we want both `xy` and `(xy` to catch `(xyz)`
377     kwargs['%s__iregex' % name] = u"(^|[^[:alnum:]_])%s" % prefix
378
379     return Q(**kwargs)
380
381
382 def _word_starts_with_regexp(prefix):
383     prefix = _no_diacritics_regexp(unicode_re_escape(prefix))
384     return ur"(^|(?<=[^\wąćęłńóśźżĄĆĘŁŃÓŚŹŻ]))%s" % prefix
385
386
387 def _sqlite_word_starts_with(name, prefix):
388     """ version of _word_starts_with for SQLite
389
390     SQLite in Django uses Python re module
391     """
392     kwargs = {'%s__iregex' % name: _word_starts_with_regexp(prefix)}
393     return Q(**kwargs)
394
395
396 if hasattr(settings, 'DATABASES'):
397     if settings.DATABASES['default']['ENGINE'] == 'django.db.backends.sqlite3':
398         _word_starts_with = _sqlite_word_starts_with
399 elif settings.DATABASE_ENGINE == 'sqlite3':
400     _word_starts_with = _sqlite_word_starts_with
401
402
403 class App:
404     def __init__(self, name, view):
405         self.name = name
406         self._view = view
407         self.lower = name.lower()
408         self.category = 'application'
409
410     def view(self):
411         return reverse(*self._view)
412
413 _apps = (
414     App(u'Leśmianator', (u'lesmianator', )),
415     )
416
417
418 def _tags_starting_with(prefix, user=None):
419     prefix = prefix.lower()
420     # PD counter
421     book_stubs = BookStub.objects.filter(_word_starts_with('title', prefix))
422     authors = Author.objects.filter(_word_starts_with('name', prefix))
423
424     books = Book.objects.filter(_word_starts_with('title', prefix))
425     tags = Tag.objects.filter(_word_starts_with('name', prefix))
426     if user and user.is_authenticated():
427         tags = tags.filter(~Q(category='set') | Q(user=user))
428     else:
429         tags = tags.exclude(category='set')
430
431     prefix_regexp = re.compile(_word_starts_with_regexp(prefix))
432     return list(books) + list(tags) + [app for app in _apps if prefix_regexp.search(app.lower)] + list(book_stubs) + \
433         list(authors)
434
435
436 def _get_result_link(match, tag_list):
437     if isinstance(match, Tag):
438         return reverse('catalogue.views.tagged_object_list',
439                        kwargs={'tags': '/'.join(tag.url_chunk for tag in tag_list + [match])})
440     elif isinstance(match, App):
441         return match.view()
442     else:
443         return match.get_absolute_url()
444
445
446 def _get_result_type(match):
447     if isinstance(match, Book) or isinstance(match, BookStub):
448         match_type = 'book'
449     else:
450         match_type = match.category
451     return match_type
452
453
454 def books_starting_with(prefix):
455     prefix = prefix.lower()
456     return Book.objects.filter(_word_starts_with('title', prefix))
457
458
459 def find_best_matches(query, user=None):
460     """ Finds a Book, Tag, BookStub or Author best matching a query.
461
462     Returns a with:
463       - zero elements when nothing is found,
464       - one element when a best result is found,
465       - more then one element on multiple exact matches
466
467     Raises a ValueError on too short a query.
468     """
469
470     query = query.lower()
471     if len(query) < 2:
472         raise ValueError("query must have at least two characters")
473
474     result = tuple(_tags_starting_with(query, user))
475     # remove pdcounter stuff
476     book_titles = set(match.pretty_title().lower() for match in result
477                       if isinstance(match, Book))
478     authors = set(match.name.lower() for match in result
479                   if isinstance(match, Tag) and match.category == 'author')
480     result = tuple(res for res in result if not (
481                  (isinstance(res, BookStub) and res.pretty_title().lower() in book_titles) or
482                  (isinstance(res, Author) and res.name.lower() in authors)
483              ))
484
485     exact_matches = tuple(res for res in result if res.name.lower() == query)
486     if exact_matches:
487         return exact_matches
488     else:
489         return tuple(result)[:1]
490
491
492 def search(request):
493     tags = request.GET.get('tags', '')
494     prefix = request.GET.get('q', '')
495
496     try:
497         tag_list = Tag.get_tag_list(tags)
498     except (Tag.DoesNotExist, Tag.MultipleObjectsReturned, Tag.UrlDeprecationWarning):
499         tag_list = []
500
501     try:
502         result = find_best_matches(prefix, request.user)
503     except ValueError:
504         return render_to_response(
505             'catalogue/search_too_short.html', {'tags': tag_list, 'prefix': prefix},
506             context_instance=RequestContext(request))
507
508     if len(result) == 1:
509         return HttpResponseRedirect(_get_result_link(result[0], tag_list))
510     elif len(result) > 1:
511         return render_to_response(
512             'catalogue/search_multiple_hits.html',
513             {
514                 'tags': tag_list, 'prefix': prefix,
515                 'results': ((x, _get_result_link(x, tag_list), _get_result_type(x)) for x in result)
516             },
517             context_instance=RequestContext(request))
518     else:
519         form = PublishingSuggestForm(initial={"books": prefix + ", "})
520         return render_to_response(
521             'catalogue/search_no_hits.html',
522             {'tags': tag_list, 'prefix': prefix, "pubsuggest_form": form},
523             context_instance=RequestContext(request))
524
525
526 def tags_starting_with(request):
527     prefix = request.GET.get('q', '')
528     # Prefix must have at least 2 characters
529     if len(prefix) < 2:
530         return HttpResponse('')
531     tags_list = []
532     result = ""
533     for tag in _tags_starting_with(prefix, request.user):
534         if tag.name not in tags_list:
535             result += "\n" + tag.name
536             tags_list.append(tag.name)
537     return HttpResponse(result)
538
539
540 def json_tags_starting_with(request, callback=None):
541     # Callback for JSONP
542     prefix = request.GET.get('q', '')
543     callback = request.GET.get('callback', '')
544     # Prefix must have at least 2 characters
545     if len(prefix) < 2:
546         return HttpResponse('')
547     tags_list = []
548     for tag in _tags_starting_with(prefix, request.user):
549         if tag.name not in tags_list:
550             tags_list.append(tag.name)
551     if request.GET.get('mozhint', ''):
552         result = [prefix, tags_list]
553     else:
554         result = {"matches": tags_list}
555     response = JsonResponse(result, safe=False)
556     if callback:
557         response.content = callback + "(" + response.content + ");"
558     return response
559
560
561 # =========
562 # = Admin =
563 # =========
564 @login_required
565 @staff_required
566 def import_book(request):
567     """docstring for import_book"""
568     book_import_form = forms.BookImportForm(request.POST, request.FILES)
569     if book_import_form.is_valid():
570         try:
571             book_import_form.save()
572         except:
573             import sys
574             import pprint
575             import traceback
576             info = sys.exc_info()
577             exception = pprint.pformat(info[1])
578             tb = '\n'.join(traceback.format_tb(info[2]))
579             return HttpResponse(
580                     _("An error occurred: %(exception)s\n\n%(tb)s") % {'exception': exception, 'tb': tb},
581                     mimetype='text/plain')
582         return HttpResponse(_("Book imported successfully"))
583     else:
584         return HttpResponse(_("Error importing file: %r") % book_import_form.errors)
585
586
587 # info views for API
588
589 def book_info(request, book_id, lang='pl'):
590     book = get_object_or_404(Book, id=book_id)
591     # set language by hand
592     translation.activate(lang)
593     return render_to_response('catalogue/book_info.html', {'book': book}, context_instance=RequestContext(request))
594
595
596 def tag_info(request, tag_id):
597     tag = get_object_or_404(Tag, id=tag_id)
598     return HttpResponse(tag.description)
599
600
601 def download_zip(request, format, slug=None):
602     if format in Book.ebook_formats:
603         url = Book.zip_format(format)
604     elif format in ('mp3', 'ogg') and slug is not None:
605         book = get_object_or_404(Book, slug=slug)
606         url = book.zip_audiobooks(format)
607     else:
608         raise Http404('No format specified for zip package')
609     return HttpResponseRedirect(urlquote_plus(settings.MEDIA_URL + url, safe='/?='))
610
611
612 class CustomPDFFormView(AjaxableFormView):
613     form_class = forms.CustomPDFForm
614     title = ugettext_lazy('Download custom PDF')
615     submit = ugettext_lazy('Download')
616     honeypot = True
617
618     def __call__(self, *args, **kwargs):
619         if settings.NO_CUSTOM_PDF:
620             raise Http404('Custom PDF is disabled')
621         return super(CustomPDFFormView, self).__call__(*args, **kwargs)
622
623     def form_args(self, request, obj):
624         """Override to parse view args and give additional args to the form."""
625         return (obj,), {}
626
627     def get_object(self, request, slug, *args, **kwargs):
628         return get_object_or_404(Book, slug=slug)
629
630     def context_description(self, request, obj):
631         return obj.pretty_title()
632
633
634 ####
635 # Includes
636 ####
637
638
639 @ssi_included
640 def book_mini(request, pk, with_link=True):
641     book = get_object_or_404(Book, pk=pk)
642     author_str = ", ".join(tag.name for tag in book.tags.filter(category='author'))
643     return render(request, 'catalogue/book_mini_box.html', {
644         'book': book,
645         'author_str': author_str,
646         'with_link': with_link,
647         'show_lang': book.language_code() != settings.LANGUAGE_CODE,
648     })
649
650
651 @ssi_included(get_ssi_vars=lambda pk: (lambda ipk: (
652         ('ssify.get_csrf_token',),
653         ('social_tags.likes_book', (ipk,)),
654         ('social_tags.book_shelf_tags', (ipk,)),
655     ))(ssi_expect(pk, int)))
656 def book_short(request, pk):
657     book = get_object_or_404(Book, pk=pk)
658     stage_note, stage_note_url = book.stage_note()
659     audiobooks, projects, have_oggs = get_audiobooks(book)
660
661     return render(request, 'catalogue/book_short.html', {
662         'book': book,
663         'has_audio': book.has_media('mp3'),
664         'main_link': book.get_absolute_url(),
665         'parents': book.parents(),
666         'tags': split_tags(book.tags.exclude(category__in=('set', 'theme'))),
667         'show_lang': book.language_code() != settings.LANGUAGE_CODE,
668         'stage_note': stage_note,
669         'stage_note_url': stage_note_url,
670         'audiobooks': audiobooks,
671         'have_oggs': have_oggs,
672     })
673
674
675 @ssi_included(
676     get_ssi_vars=lambda pk: book_short.get_ssi_vars(pk) +
677     (lambda ipk: (
678         ('social_tags.choose_cite', [ipk]),
679         ('catalogue_tags.choose_fragment', [ipk], {
680             'unless': Var('social_tags.choose_cite', [ipk])}),
681     ))(ssi_expect(pk, int)))
682 def book_wide(request, pk):
683     book = get_object_or_404(Book, pk=pk)
684     stage_note, stage_note_url = book.stage_note()
685     extra_info = book.extra_info
686     audiobooks, projects, have_oggs = get_audiobooks(book)
687
688     return render(request, 'catalogue/book_wide.html', {
689         'book': book,
690         'has_audio': book.has_media('mp3'),
691         'parents': book.parents(),
692         'tags': split_tags(book.tags.exclude(category__in=('set', 'theme'))),
693         'show_lang': book.language_code() != settings.LANGUAGE_CODE,
694         'stage_note': stage_note,
695         'stage_note_url': stage_note_url,
696
697         'main_link': reverse('book_text', args=[book.slug]) if book.html_file else None,
698         'extra_info': extra_info,
699         'hide_about': extra_info.get('about', '').startswith('http://wiki.wolnepodreczniki.pl'),
700         'audiobooks': audiobooks,
701         'have_oggs': have_oggs,
702     })
703
704
705 @ssi_included
706 def fragment_short(request, pk):
707     fragment = get_object_or_404(Fragment, pk=pk)
708     return render(request, 'catalogue/fragment_short.html', {'fragment': fragment})
709
710
711 @ssi_included
712 def fragment_promo(request, pk):
713     fragment = get_object_or_404(Fragment, pk=pk)
714     return render(request, 'catalogue/fragment_promo.html', {'fragment': fragment})
715
716
717 @ssi_included
718 def tag_box(request, pk):
719     tag = get_object_or_404(Tag, pk=pk)
720     assert tag.category != 'set'
721
722     return render(request, 'catalogue/tag_box.html', {
723         'tag': tag,
724     })
725
726
727 @ssi_included
728 def collection_box(request, pk):
729     obj = get_object_or_404(Collection, pk=pk)
730
731     return render(request, 'catalogue/collection_box.html', {
732         'obj': obj,
733     })
734
735
736 def tag_catalogue(request, category):
737     if category == 'theme':
738         tags = Tag.objects.usage_for_model(
739             Fragment, counts=True).filter(category='theme')
740     else:
741         tags = list(get_top_level_related_tags((), categories=(category,)))
742
743     described_tags = [tag for tag in tags if tag.description]
744
745     if len(described_tags) > 4:
746         best = random.sample(described_tags, 4)
747     else:
748         best = described_tags
749
750     return render(request, 'catalogue/tag_catalogue.html', {
751         'tags': tags,
752         'best': best,
753         'title': constants.CATEGORIES_NAME_PLURAL[category],
754         'whole_category': constants.WHOLE_CATEGORY[category],
755     })
756
757
758 def collections(request):
759     objects = Collection.objects.all()
760
761     if len(objects) > 3:
762         best = random.sample(objects, 3)
763     else:
764         best = objects
765
766     return render(request, 'catalogue/collections.html', {
767         'objects': objects,
768         'best': best,
769     })