Preparing for Django 1.10
[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 random
7
8 from django.conf import settings
9 from django.http.response import HttpResponseForbidden
10 from django.template.loader import render_to_string
11 from django.shortcuts import get_object_or_404, render, redirect
12 from django.http import HttpResponse, HttpResponseRedirect, Http404, HttpResponsePermanentRedirect
13 from django.core.urlresolvers import reverse
14 from django.db.models import Q, QuerySet
15 from django.contrib.auth.decorators import login_required, user_passes_test
16 from django.utils.http import urlquote_plus
17 from django.utils import translation
18 from django.utils.translation import ugettext as _, ugettext_lazy
19
20 from ajaxable.utils import AjaxableFormView
21 from pdcounter import views as pdcounter_views
22 from paypal.rest import user_is_subscribed
23 from picture.models import Picture, PictureArea
24 from ssify import ssi_included, ssi_expect, SsiVariable as Var
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, e:
175         # Ask the user to disambiguate
176         raise ResponseInstead(differentiate_tags(request, e.tags, e.ambiguous_slugs))
177     except Tag.UrlDeprecationWarning, 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 def book_detail(request, slug):
273     try:
274         book = Book.objects.get(slug=slug)
275     except Book.DoesNotExist:
276         return pdcounter_views.book_stub_detail(request, slug)
277
278     return render(
279         request,
280         'catalogue/book_detail.html',
281         {
282             'book': book,
283             'book_children': book.children.all().order_by('parent_number', 'sort_key'),
284             'active_menu_item': 'books',
285         })
286
287
288 # używane w publicznym interfejsie
289 def player(request, slug):
290     book = get_object_or_404(Book, slug=slug)
291     if not book.has_media('mp3'):
292         raise Http404
293
294     audiobooks, projects = book.get_audiobooks()
295
296     return render(
297         request,
298         'catalogue/player.html',
299         {
300             'book': book,
301             'audiobook': '',
302             'audiobooks': audiobooks,
303             'projects': projects,
304         })
305
306
307 def book_text(request, slug):
308     book = get_object_or_404(Book, slug=slug)
309
310     if book.preview and not user_is_subscribed(request.user):
311         return HttpResponseRedirect(book.get_absolute_url())
312
313     if not book.has_html_file():
314         raise Http404
315     return render(request, 'catalogue/book_text.html', {'book': book})
316
317
318 # =========
319 # = Admin =
320 # =========
321 @login_required
322 @staff_required
323 def import_book(request):
324     """docstring for import_book"""
325     book_import_form = forms.BookImportForm(request.POST, request.FILES)
326     if book_import_form.is_valid():
327         try:
328             book_import_form.save()
329         except:
330             import sys
331             import pprint
332             import traceback
333             info = sys.exc_info()
334             exception = pprint.pformat(info[1])
335             tb = '\n'.join(traceback.format_tb(info[2]))
336             return HttpResponse(
337                     _("An error occurred: %(exception)s\n\n%(tb)s") % {'exception': exception, 'tb': tb},
338                     mimetype='text/plain')
339         return HttpResponse(_("Book imported successfully"))
340     else:
341         return HttpResponse(_("Error importing file: %r") % book_import_form.errors)
342
343
344 # info views for API
345
346 def book_info(request, book_id, lang='pl'):
347     book = get_object_or_404(Book, id=book_id)
348     # set language by hand
349     translation.activate(lang)
350     return render(request, 'catalogue/book_info.html', {'book': book})
351
352
353 def tag_info(request, tag_id):
354     tag = get_object_or_404(Tag, id=tag_id)
355     return HttpResponse(tag.description)
356
357
358 def embargo_link(request, format_, slug):
359     book = get_object_or_404(Book, slug=slug)
360     if format_ not in Book.formats:
361         raise Http404
362     media_file = book.get_media(format_)
363     if not book.preview:
364         return HttpResponseRedirect(media_file.url)
365     if not user_is_subscribed(request.user):
366         return HttpResponseRedirect(book.get_absolute_url())
367     return HttpResponse(media_file, content_type=constants.EBOOK_CONTENT_TYPES[format_])
368
369
370 def download_zip(request, format, slug=None):
371     if format in Book.ebook_formats:
372         url = Book.zip_format(format)
373     elif format in ('mp3', 'ogg') and slug is not None:
374         book = get_object_or_404(Book, slug=slug)
375         url = book.zip_audiobooks(format)
376     else:
377         raise Http404('No format specified for zip package')
378     return HttpResponseRedirect(urlquote_plus(settings.MEDIA_URL + url, safe='/?='))
379
380
381 class CustomPDFFormView(AjaxableFormView):
382     form_class = forms.CustomPDFForm
383     title = ugettext_lazy('Download custom PDF')
384     submit = ugettext_lazy('Download')
385     template = 'catalogue/custom_pdf_form.html'
386     honeypot = True
387
388     def __call__(self, *args, **kwargs):
389         if settings.NO_CUSTOM_PDF:
390             raise Http404('Custom PDF is disabled')
391         return super(CustomPDFFormView, self).__call__(*args, **kwargs)
392
393     def form_args(self, request, obj):
394         """Override to parse view args and give additional args to the form."""
395         return (obj,), {}
396
397     def validate_object(self, obj, request):
398         book = obj
399         if book.preview and not user_is_subscribed(request.user):
400             return HttpResponseRedirect(book.get_absolute_url())
401         return super(CustomPDFFormView, self).validate_object(obj, request)
402
403     def get_object(self, request, slug, *args, **kwargs):
404         book = get_object_or_404(Book, slug=slug)
405         return book
406
407     def context_description(self, request, obj):
408         return obj.pretty_title()
409
410
411 ####
412 # Includes
413 ####
414
415
416 @ssi_included
417 def book_mini(request, pk, with_link=True):
418     # book = get_object_or_404(Book, pk=pk)
419     try:
420         book = Book.objects.only('cover_thumb', 'title', 'language', 'slug').get(pk=pk)
421     except Book.DoesNotExist:
422         raise Http404
423     return render(request, 'catalogue/book_mini_box.html', {
424         'book': book,
425         'no_link': not with_link,
426     })
427
428
429 @ssi_included(get_ssi_vars=lambda pk: (lambda ipk: (
430         ('ssify.get_csrf_token',),
431         ('social_tags.likes_book', (ipk,)),
432         ('social_tags.book_shelf_tags', (ipk,)),
433     ))(ssi_expect(pk, int)))
434 def book_short(request, pk):
435     book = get_object_or_404(Book, pk=pk)
436
437     return render(request, 'catalogue/book_short.html', {
438         'book': book,
439     })
440
441
442 @ssi_included(
443     get_ssi_vars=lambda pk: book_short.get_ssi_vars(pk) +
444     (lambda ipk: (
445         ('social_tags.choose_cite', [ipk]),
446         ('catalogue_tags.choose_fragment', [ipk], {
447             'unless': Var('social_tags.choose_cite', [ipk])}),
448     ))(ssi_expect(pk, int)))
449 def book_wide(request, pk):
450     book = get_object_or_404(Book, pk=pk)
451
452     return render(request, 'catalogue/book_wide.html', {
453         'book': book,
454     })
455
456
457 @ssi_included
458 def fragment_short(request, pk):
459     fragment = get_object_or_404(Fragment, pk=pk)
460     return render(request, 'catalogue/fragment_short.html', {'fragment': fragment})
461
462
463 @ssi_included
464 def fragment_promo(request, pk):
465     fragment = get_object_or_404(Fragment, pk=pk)
466     return render(request, 'catalogue/fragment_promo.html', {'fragment': fragment})
467
468
469 @ssi_included
470 def tag_box(request, pk):
471     tag = get_object_or_404(Tag, pk=pk)
472     assert tag.category != 'set'
473
474     return render(request, 'catalogue/tag_box.html', {
475         'tag': tag,
476     })
477
478
479 @ssi_included
480 def collection_box(request, pk):
481     collection = get_object_or_404(Collection, pk=pk)
482
483     return render(request, 'catalogue/collection_box.html', {
484         'collection': collection,
485     })
486
487
488 def tag_catalogue(request, category):
489     if category == 'theme':
490         tags = Tag.objects.usage_for_model(
491             Fragment, counts=True).filter(category='theme')
492     else:
493         tags = list(get_top_level_related_tags((), categories=(category,)))
494
495     described_tags = [tag for tag in tags if tag.description]
496
497     if len(described_tags) > 4:
498         best = random.sample(described_tags, 4)
499     else:
500         best = described_tags
501
502     return render(request, 'catalogue/tag_catalogue.html', {
503         'tags': tags,
504         'best': best,
505         'title': constants.CATEGORIES_NAME_PLURAL[category],
506         'whole_category': constants.WHOLE_CATEGORY[category],
507         'active_menu_item': 'theme' if category == 'theme' else None,
508     })
509
510
511 def collections(request):
512     objects = Collection.objects.all()
513
514     if len(objects) > 3:
515         best = random.sample(objects, 3)
516     else:
517         best = objects
518
519     return render(request, 'catalogue/collections.html', {
520         'objects': objects,
521         'best': best,
522     })
523
524
525 def ridero_cover(request, slug):
526     from librarian.cover import make_cover
527     wldoc = Book.objects.get(slug=slug).wldocument()
528     cover = make_cover(wldoc.book_info, width=980, bleed=20, format='PNG')
529     response = HttpResponse(content_type="image/png")
530     cover.save(response)
531     return response
532
533
534 def get_isbn(request, book_format, slug):
535     book = Book.objects.get(slug=slug)
536     return HttpResponse(book.extra_info.get('isbn_%s' % book_format))