9da3ebbf8c54ec39151bbb75746360610ec35c13
[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 import re
7
8 from django.conf import settings
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.forms import ScheduleForm
22 from club.models import Club, Membership
23 from annoy.models import DynamicTextInsert
24 from pdcounter import views as pdcounter_views
25 from picture.models import Picture, PictureArea
26 from catalogue import constants
27 from catalogue import forms
28 from catalogue.helpers import get_top_level_related_tags
29 from catalogue.models import Book, Collection, Tag, Fragment
30 from catalogue.utils import split_tags
31 from catalogue.models.tag import prefetch_relations
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(findable=True, parent=None),
39         'pictures': Picture.objects.all(),
40         'collections': Collection.objects.filter(listed=True),
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', {
71         'collection': coll,
72         'active_menu_item': 'collections',
73     })
74
75
76 def differentiate_tags(request, tags, ambiguous_slugs):
77     beginning = '/'.join(tag.url_chunk for tag in tags)
78     unparsed = '/'.join(ambiguous_slugs[1:])
79     options = []
80     for tag in Tag.objects.filter(slug=ambiguous_slugs[0]):
81         options.append({
82             'url_args': '/'.join((beginning, tag.url_chunk, unparsed)).strip('/'),
83             'tags': [tag]
84         })
85     return render(
86         request,
87         'catalogue/differentiate_tags.html',
88         {'tags': tags, 'options': options, 'unparsed': ambiguous_slugs[1:]}
89     )
90
91
92 def object_list(request, objects, fragments=None, related_tags=None, tags=None,
93                 list_type='books', extra=None):
94     if not tags:
95         tags = []
96     tag_ids = [tag.pk for tag in tags]
97
98     related_tag_lists = []
99     if related_tags:
100         related_tag_lists.append(related_tags)
101     else:
102         related_tag_lists.append(
103             Tag.objects.usage_for_queryset(
104                 objects, counts=True
105             ).exclude(category='set').exclude(pk__in=tag_ids))
106     if not (extra and extra.get('theme_is_set')):
107         if fragments is None:
108             if list_type == 'gallery':
109                 fragments = PictureArea.objects.filter(picture__in=objects)
110             else:
111                 fragments = Fragment.objects.filter(book__in=objects)
112         related_tag_lists.append(
113             Tag.objects.usage_for_queryset(
114                 fragments, counts=True
115             ).filter(category='theme').exclude(pk__in=tag_ids)
116             .only('name', 'sort_key', 'category', 'slug'))
117         if isinstance(objects, QuerySet):
118             objects = prefetch_relations(objects, 'author')
119
120     categories = split_tags(*related_tag_lists)
121
122     objects = list(objects)
123
124     if not objects and len(tags) == 1 and list_type == 'books':
125         if PictureArea.tagged.with_any(tags).exists() or Picture.tagged.with_any(tags).exists():
126             return redirect('tagged_object_list_gallery', '/'.join(tag.url_chunk for tag in tags))
127
128     if len(objects) > 3:
129         best = random.sample(objects, 3)
130     else:
131         best = objects
132
133     result = {
134         'object_list': objects,
135         'categories': categories,
136         'list_type': list_type,
137         'tags': tags,
138
139         'formats_form': forms.DownloadFormatsForm(),
140         'best': best,
141         'active_menu_item': list_type,
142     }
143     if extra:
144         result.update(extra)
145     return render(
146         request,
147         'catalogue/tagged_object_list.html', result,
148     )
149
150
151 def literature(request):
152     books = Book.objects.filter(parent=None, findable=True)
153     return object_list(request, books, related_tags=get_top_level_related_tags([]))
154
155
156 def gallery(request):
157     return object_list(request, Picture.objects.all(), list_type='gallery')
158
159
160 def audiobooks(request):
161     audiobooks = Book.objects.filter(findable=True, media__type__in=('mp3', 'ogg')).distinct()
162     return object_list(request, audiobooks, list_type='audiobooks', extra={
163         'daisy': Book.objects.filter(findable=True, media__type='daisy').distinct(),
164     })
165
166
167 class ResponseInstead(Exception):
168     def __init__(self, response):
169         super(ResponseInstead, self).__init__()
170         self.response = response
171
172
173 def analyse_tags(request, tag_str):
174     try:
175         tags = Tag.get_tag_list(tag_str)
176     except Tag.DoesNotExist:
177         # Perhaps the user is asking about an author in Public Domain
178         # counter (they are not represented in tags)
179         chunks = tag_str.split('/')
180         if len(chunks) == 2 and chunks[0] == 'autor':
181             raise ResponseInstead(pdcounter_views.author_detail(request, chunks[1]))
182         raise Http404
183     except Tag.MultipleObjectsReturned as e:
184         # Ask the user to disambiguate
185         raise ResponseInstead(differentiate_tags(request, e.tags, e.ambiguous_slugs))
186     except Tag.UrlDeprecationWarning as e:
187         raise ResponseInstead(HttpResponsePermanentRedirect(
188             reverse('tagged_object_list', args=['/'.join(tag.url_chunk for tag in e.tags)])))
189
190     try:
191         if len(tags) > settings.MAX_TAG_LIST:
192             raise Http404
193     except AttributeError:
194         pass
195
196     return tags
197
198
199 def theme_list(request, tags, list_type):
200     shelf_tags = [tag for tag in tags if tag.category == 'set']
201     fragment_tags = [tag for tag in tags if tag.category != 'set']
202     if list_type == 'gallery':
203         fragments = PictureArea.tagged.with_all(fragment_tags)
204     else:
205         fragments = Fragment.tagged.with_all(fragment_tags)
206
207     if shelf_tags:
208         # TODO: Pictures on shelves not supported yet.
209         books = Book.tagged.with_all(shelf_tags).order_by()
210         fragments = fragments.filter(Q(book__in=books) | Q(book__ancestor__in=books))
211     elif list_type == 'books':
212         fragments = fragments.filter(book__findable=True)
213
214     if not fragments and len(tags) == 1 and list_type == 'books':
215         if PictureArea.tagged.with_any(tags).exists() or Picture.tagged.with_any(tags).exists():
216             return redirect('tagged_object_list_gallery', '/'.join(tag.url_chunk for tag in tags))
217
218     return object_list(request, fragments, tags=tags, list_type=list_type, extra={
219         'theme_is_set': True,
220         'active_menu_item': 'theme',
221     })
222
223
224 def tagged_object_list(request, tags, list_type):
225     try:
226         tags = analyse_tags(request, tags)
227     except ResponseInstead as e:
228         return e.response
229
230     if list_type == 'gallery' and any(tag.category == 'set' for tag in tags):
231         raise Http404
232
233     if any(tag.category in ('theme', 'thing') for tag in tags):
234         return theme_list(request, tags, list_type=list_type)
235
236     if list_type == 'books':
237         books = Book.tagged.with_all(tags)
238
239         if any(tag.category == 'set' for tag in tags):
240             params = {'objects': books}
241         else:
242             books = books.filter(findable=True)
243             params = {
244                 'objects': Book.tagged_top_level(tags).filter(findable=True),
245                 'fragments': Fragment.objects.filter(book__in=books),
246                 'related_tags': get_top_level_related_tags(tags),
247             }
248     elif list_type == 'gallery':
249         params = {'objects': Picture.tagged.with_all(tags)}
250     elif list_type == 'audiobooks':
251         audiobooks = Book.objects.filter(findable=True, media__type__in=('mp3', 'ogg')).distinct()
252         params = {
253             'objects': Book.tagged.with_all(tags, audiobooks),
254             'extra': {
255                 'daisy': Book.tagged.with_all(
256                     tags, audiobooks.filter(media__type='daisy').distinct()
257                 ),
258             }
259         }
260     else:
261         raise Http404
262
263     return object_list(request, tags=tags, list_type=list_type, **params)
264
265
266 def book_fragments(request, slug, theme_slug):
267     book = get_object_or_404(Book, slug=slug)
268     theme = get_object_or_404(Tag, slug=theme_slug, category='theme')
269     fragments = Fragment.tagged.with_all([theme]).filter(
270         Q(book=book) | Q(book__ancestor=book))
271
272     return render(
273         request,
274         'catalogue/book_fragments.html',
275         {
276             'book': book,
277             'theme': theme,
278             'fragments': fragments,
279             'active_menu_item': 'books',
280         })
281
282
283 @never_cache
284 def book_detail(request, slug):
285     try:
286         book = Book.objects.get(slug=slug)
287     except Book.DoesNotExist:
288         return pdcounter_views.book_stub_detail(request, slug)
289
290     new_layout = request.EXPERIMENTS['layout']
291     # Not for preview books.
292     if new_layout.value and not book.is_accessible_to(request.user):
293         new_layout.override(None)
294     
295     return render(
296         request,
297         'catalogue/2021/book_detail.html' if new_layout.value else 'catalogue/book_detail.html',
298         {
299             'book': book,
300             'book_children': book.children.all().order_by('parent_number', 'sort_key'),
301             'active_menu_item': 'books',
302             'club_form': ScheduleForm() if book.preview else None,
303             'club': Club.objects.first() if book.preview else None,
304
305             'EXPERIMENTS_SWITCHABLE_layout': True,
306         })
307
308
309 # używane w publicznym interfejsie
310 def player(request, slug):
311     book = get_object_or_404(Book, slug=slug)
312     if not book.has_media('mp3'):
313         raise Http404
314
315     audiobooks, projects = book.get_audiobooks()
316
317     return render(
318         request,
319         'catalogue/player.html',
320         {
321             'book': book,
322             'audiobook': '',
323             'audiobooks': audiobooks,
324             'projects': projects,
325         })
326
327
328 def book_text(request, slug):
329     book = get_object_or_404(Book, slug=slug)
330
331     if book.preview and not Membership.is_active_for(request.user):
332         return HttpResponseRedirect(book.get_absolute_url())
333
334     if not book.has_html_file():
335         raise Http404
336     with book.html_file.open('r') as f:
337         book_text = f.read()
338
339     return render(request, 'catalogue/book_text.html', {
340         'book': book,
341         'book_text': book_text,
342         'inserts': DynamicTextInsert.get_all(request)
343     })
344
345
346 # =========
347 # = Admin =
348 # =========
349 @login_required
350 @staff_required
351 def import_book(request):
352     """docstring for import_book"""
353     book_import_form = forms.BookImportForm(request.POST, request.FILES)
354     if book_import_form.is_valid():
355         try:
356             book_import_form.save()
357         except:
358             import sys
359             import pprint
360             import traceback
361             info = sys.exc_info()
362             exception = pprint.pformat(info[1])
363             tb = '\n'.join(traceback.format_tb(info[2]))
364             return HttpResponse(
365                 _("An error occurred: %(exception)s\n\n%(tb)s") % {
366                     'exception': exception, 'tb': tb
367                 },
368                 content_type='text/plain'
369             )
370         return HttpResponse(_("Book imported successfully"))
371     return HttpResponse(_("Error importing file: %r") % book_import_form.errors)
372
373
374 # info views for API
375
376 def book_info(request, book_id, lang='pl'):
377     book = get_object_or_404(Book, id=book_id)
378     # set language by hand
379     translation.activate(lang)
380     return render(request, 'catalogue/book_info.html', {'book': book})
381
382
383 def tag_info(request, tag_id):
384     tag = get_object_or_404(Tag, id=tag_id)
385     return HttpResponse(tag.description)
386
387
388 @never_cache
389 def embargo_link(request, key, format_, slug):
390     book = get_object_or_404(Book, slug=slug)
391     if format_ not in Book.formats:
392         raise Http404
393     if key != book.preview_key:
394         raise Http404
395     media_file = book.get_media(format_)
396     if not book.preview:
397         return HttpResponseRedirect(media_file.url)
398     return HttpResponse(media_file, content_type=constants.EBOOK_CONTENT_TYPES[format_])
399
400
401 def download_zip(request, format, slug=None):
402     if format in Book.ebook_formats:
403         url = Book.zip_format(format)
404     elif format in ('mp3', 'ogg') and slug is not None:
405         book = get_object_or_404(Book, slug=slug)
406         url = book.zip_audiobooks(format)
407     else:
408         raise Http404('No format specified for zip package')
409     return HttpResponseRedirect(urlquote_plus(settings.MEDIA_URL + url, safe='/?='))
410
411
412 class CustomPDFFormView(AjaxableFormView):
413     form_class = forms.CustomPDFForm
414     title = ugettext_lazy('Download custom PDF')
415     submit = ugettext_lazy('Download')
416     template = 'catalogue/custom_pdf_form.html'
417     honeypot = True
418
419     def __call__(self, *args, **kwargs):
420         if settings.NO_CUSTOM_PDF:
421             raise Http404('Custom PDF is disabled')
422         return super(CustomPDFFormView, self).__call__(*args, **kwargs)
423
424     def form_args(self, request, obj):
425         """Override to parse view args and give additional args to the form."""
426         return (obj,), {}
427
428     def validate_object(self, obj, request):
429         book = obj
430         if book.preview and not Membership.is_active_for(request.user):
431             return HttpResponseRedirect(book.get_absolute_url())
432         return super(CustomPDFFormView, self).validate_object(obj, request)
433
434     def get_object(self, request, slug, *args, **kwargs):
435         book = get_object_or_404(Book, slug=slug)
436         return book
437
438     def context_description(self, request, obj):
439         return obj.pretty_title()
440
441
442 def tag_catalogue(request, category):
443     if category == 'theme':
444         tags = Tag.objects.usage_for_model(
445             Fragment, counts=True).filter(category='theme')
446     else:
447         tags = list(get_top_level_related_tags((), categories=(category,)))
448
449     described_tags = [tag for tag in tags if tag.description]
450
451     if len(described_tags) > 4:
452         best = random.sample(described_tags, 4)
453     else:
454         best = described_tags
455
456     return render(request, 'catalogue/tag_catalogue.html', {
457         'tags': tags,
458         'best': best,
459         'title': constants.CATEGORIES_NAME_PLURAL[category],
460         'whole_category': constants.WHOLE_CATEGORY[category],
461         'active_menu_item': 'theme' if category == 'theme' else None,
462     })
463
464
465 def collections(request):
466     objects = Collection.objects.filter(listed=True)
467
468     if len(objects) > 3:
469         best = random.sample(list(objects), 4)
470     else:
471         best = objects
472
473     return render(request, 'catalogue/collections.html', {
474         'objects': objects,
475         'best': best,
476         'active_menu_item': 'collections'
477     })
478
479
480 def ridero_cover(request, slug):
481     from librarian.cover import make_cover
482     wldoc = Book.objects.get(slug=slug).wldocument()
483     cover = make_cover(wldoc.book_info, width=980, bleed=20, format='PNG')
484     response = HttpResponse(content_type="image/png")
485     cover.save(response)
486     return response
487
488
489 def get_isbn(request, book_format, slug):
490     book = Book.objects.get(slug=slug)
491     return HttpResponse(book.get_extra_info_json().get('isbn_%s' % book_format))