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 pdcounter import views as pdcounter_views
  23 from picture.models import Picture, PictureArea
  24 from catalogue import constants
  25 from catalogue import forms
  26 from catalogue.helpers import get_top_level_related_tags
  27 from catalogue.models import Book, Collection, Tag, Fragment
  28 from catalogue.utils import split_tags
  29 from catalogue.models.tag import prefetch_relations
  30 from wolnelektury.utils import is_crawler
  31
  32 staff_required = user_passes_test(lambda user: user.is_staff)
  33
  34
  35 def catalogue(request):
  36     return render(request, 'catalogue/catalogue.html', {
  37         'books': Book.objects.filter(parent=None),
  38         'pictures': Picture.objects.all(),
  39         'collections': Collection.objects.all(),
  40         'active_menu_item': 'all_works',
  41     })
  42
  43
  44 def book_list(request, filters=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'):
  47     """ generates a listing of all books, optionally filtered """
  48     books_by_author, orphans, books_by_parent = Book.book_list(filters)
  49     books_nav = OrderedDict()
  50     for tag in books_by_author:
  51         if books_by_author[tag]:
  52             books_nav.setdefault(tag.sort_key[0], []).append(tag)
  53     return render(request, template_name, {
  54         'rendered_nav': render_to_string(nav_template_name, {'books_nav': books_nav}),
  55         'rendered_book_list': render_to_string(list_template_name, {
  56             'books_by_author': books_by_author,
  57             'orphans': orphans,
  58             'books_by_parent': books_by_parent,
  59         })
  60     })
  61
  62
  63 def daisy_list(request):
  64     return book_list(request, Q(media__type='daisy'), template_name='catalogue/daisy_list.html')
  65
  66
  67 def collection(request, slug):
  68     coll = get_object_or_404(Collection, slug=slug)
  69     return render(request, 'catalogue/collection.html', {'collection': coll})
  70
  71
  72 def differentiate_tags(request, tags, ambiguous_slugs):
  73     beginning = '/'.join(tag.url_chunk for tag in tags)
  74     unparsed = '/'.join(ambiguous_slugs[1:])
  75     options = []
  76     for tag in Tag.objects.filter(slug=ambiguous_slugs[0]):
  77         options.append({
  78             'url_args': '/'.join((beginning, tag.url_chunk, unparsed)).strip('/'),
  79             'tags': [tag]
  80         })
  81     return render(
  82         request,
  83         'catalogue/differentiate_tags.html', {'tags': tags, 'options': options, 'unparsed': ambiguous_slugs[1:]})
  84
  85
  86 def object_list(request, objects, fragments=None, related_tags=None, tags=None, list_type='books', extra=None):
  87     if not tags:
  88         tags = []
  89     tag_ids = [tag.pk for tag in tags]
  90
  91     related_tag_lists = []
  92     if related_tags:
  93         related_tag_lists.append(related_tags)
  94     else:
  95         related_tag_lists.append(
  96             Tag.objects.usage_for_queryset(objects, counts=True).exclude(category='set').exclude(pk__in=tag_ids))
  97     if not (extra and extra.get('theme_is_set')):
  98         if fragments is None:
  99             if list_type == 'gallery':
 100                 fragments = PictureArea.objects.filter(picture__in=objects)
 101             else:
 102                 fragments = Fragment.objects.filter(book__in=objects)
 103         related_tag_lists.append(
 104             Tag.objects.usage_for_queryset(fragments, counts=True).filter(category='theme').exclude(pk__in=tag_ids)
 105             .only('name', 'sort_key', 'category', 'slug'))
 106         if isinstance(objects, QuerySet):
 107             objects = prefetch_relations(objects, 'author')
 108
 109     categories = split_tags(*related_tag_lists)
 110
 111     objects = list(objects)
 112
 113     if not objects and len(tags) == 1 and list_type == 'books':
 114         if PictureArea.tagged.with_any(tags).exists() or Picture.tagged.with_any(tags).exists():
 115             return redirect('tagged_object_list_gallery', '/'.join(tag.url_chunk for tag in tags))
 116
 117     if len(objects) > 3:
 118         best = random.sample(objects, 3)
 119     else:
 120         best = objects
 121
 122     result = {
 123         'object_list': objects,
 124         'categories': categories,
 125         'list_type': list_type,
 126         'tags': tags,
 127
 128         'formats_form': forms.DownloadFormatsForm(),
 129         'best': best,
 130         'active_menu_item': list_type,
 131     }
 132     if extra:
 133         result.update(extra)
 134     return render(
 135         request,
 136         'catalogue/tagged_object_list.html', result,
 137     )
 138
 139
 140 def literature(request):
 141     books = Book.objects.filter(parent=None)
 142     return object_list(request, books, related_tags=get_top_level_related_tags([]))
 143
 144
 145 def gallery(request):
 146     return object_list(request, Picture.objects.all(), list_type='gallery')
 147
 148
 149 def audiobooks(request):
 150     audiobooks = Book.objects.filter(media__type__in=('mp3', 'ogg')).distinct()
 151     return object_list(request, audiobooks, list_type='audiobooks', extra={
 152         'daisy': Book.objects.filter(media__type='daisy').distinct(),
 153     })
 154
 155
 156 class ResponseInstead(Exception):
 157     def __init__(self, response):
 158         super(ResponseInstead, self).__init__()
 159         self.response = response
 160
 161
 162 def analyse_tags(request, tag_str):
 163     try:
 164         tags = Tag.get_tag_list(tag_str)
 165     except Tag.DoesNotExist:
 166         # Perhaps the user is asking about an author in Public Domain
 167         # counter (they are not represented in tags)
 168         chunks = tag_str.split('/')
 169         if len(chunks) == 2 and chunks[0] == 'autor':
 170             raise ResponseInstead(pdcounter_views.author_detail(request, chunks[1]))
 171         else:
 172             raise Http404
 173     except Tag.MultipleObjectsReturned as e:
 174         # Ask the user to disambiguate
 175         raise ResponseInstead(differentiate_tags(request, e.tags, e.ambiguous_slugs))
 176     except Tag.UrlDeprecationWarning as e:
 177         raise ResponseInstead(HttpResponsePermanentRedirect(
 178             reverse('tagged_object_list', args=['/'.join(tag.url_chunk for tag in e.tags)])))
 179
 180     try:
 181         if len(tags) > settings.MAX_TAG_LIST:
 182             raise Http404
 183     except AttributeError:
 184         pass
 185
 186     return tags
 187
 188
 189 def theme_list(request, tags, list_type):
 190     shelf_tags = [tag for tag in tags if tag.category == 'set']
 191     fragment_tags = [tag for tag in tags if tag.category != 'set']
 192     if list_type == 'gallery':
 193         fragments = PictureArea.tagged.with_all(fragment_tags)
 194     else:
 195         fragments = Fragment.tagged.with_all(fragment_tags)
 196
 197     if shelf_tags:
 198         # TODO: Pictures on shelves not supported yet.
 199         books = Book.tagged.with_all(shelf_tags).order_by()
 200         fragments = fragments.filter(Q(book__in=books) | Q(book__ancestor__in=books))
 201
 202     if not fragments and len(tags) == 1 and list_type == 'books':
 203         if PictureArea.tagged.with_any(tags).exists() or Picture.tagged.with_any(tags).exists():
 204             return redirect('tagged_object_list_gallery', '/'.join(tag.url_chunk for tag in tags))
 205
 206     return object_list(request, fragments, tags=tags, list_type=list_type, extra={
 207         'theme_is_set': True,
 208         'active_menu_item': 'theme',
 209     })
 210
 211
 212 def tagged_object_list(request, tags, list_type):
 213     try:
 214         tags = analyse_tags(request, tags)
 215     except ResponseInstead as e:
 216         return e.response
 217
 218     if is_crawler(request) and len(tags) > 1:
 219         return HttpResponseForbidden('address removed from crawling. check robots.txt')
 220
 221     if list_type == 'gallery' and any(tag.category == 'set' for tag in tags):
 222         raise Http404
 223
 224     if any(tag.category in ('theme', 'thing') for tag in tags):
 225         return theme_list(request, tags, list_type=list_type)
 226
 227     if list_type == 'books':
 228         books = Book.tagged.with_all(tags)
 229
 230         if any(tag.category == 'set' for tag in tags):
 231             params = {'objects': books}
 232         else:
 233             params = {
 234                 'objects': Book.tagged_top_level(tags),
 235                 'fragments': Fragment.objects.filter(book__in=books),
 236                 'related_tags': get_top_level_related_tags(tags),
 237             }
 238     elif list_type == 'gallery':
 239         params = {'objects': Picture.tagged.with_all(tags)}
 240     elif list_type == 'audiobooks':
 241         audiobooks = Book.objects.filter(media__type__in=('mp3', 'ogg')).distinct()
 242         params = {
 243             'objects': Book.tagged.with_all(tags, audiobooks),
 244             'extra': {
 245                 'daisy': Book.tagged.with_all(tags, audiobooks.filter(media__type='daisy').distinct()),
 246             }
 247         }
 248     else:
 249         raise Http404
 250
 251     return object_list(request, tags=tags, list_type=list_type, **params)
 252
 253
 254 def book_fragments(request, slug, theme_slug):
 255     book = get_object_or_404(Book, slug=slug)
 256     theme = get_object_or_404(Tag, slug=theme_slug, category='theme')
 257     fragments = Fragment.tagged.with_all([theme]).filter(
 258         Q(book=book) | Q(book__ancestor=book))
 259
 260     return render(
 261         request,
 262         'catalogue/book_fragments.html',
 263         {
 264             'book': book,
 265             'theme': theme,
 266             'fragments': fragments,
 267             'active_menu_item': 'books',
 268         })
 269
 270
 271 @never_cache
 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 Membership.is_active_for(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 @never_cache
 359 def embargo_link(request, key, format_, slug):
 360     book = get_object_or_404(Book, slug=slug)
 361     if format_ not in Book.formats:
 362         raise Http404
 363     if key != book.preview_key:
 364         raise Http404
 365     media_file = book.get_media(format_)
 366     if not book.preview:
 367         return HttpResponseRedirect(media_file.url)
 368     return HttpResponse(media_file, content_type=constants.EBOOK_CONTENT_TYPES[format_])
 369
 370
 371 def download_zip(request, format, slug=None):
 372     if format in Book.ebook_formats:
 373         url = Book.zip_format(format)
 374     elif format in ('mp3', 'ogg') and slug is not None:
 375         book = get_object_or_404(Book, slug=slug)
 376         url = book.zip_audiobooks(format)
 377     else:
 378         raise Http404('No format specified for zip package')
 379     return HttpResponseRedirect(urlquote_plus(settings.MEDIA_URL + url, safe='/?='))
 380
 381
 382 class CustomPDFFormView(AjaxableFormView):
 383     form_class = forms.CustomPDFForm
 384     title = ugettext_lazy('Download custom PDF')
 385     submit = ugettext_lazy('Download')
 386     template = 'catalogue/custom_pdf_form.html'
 387     honeypot = True
 388
 389     def __call__(self, *args, **kwargs):
 390         if settings.NO_CUSTOM_PDF:
 391             raise Http404('Custom PDF is disabled')
 392         return super(CustomPDFFormView, self).__call__(*args, **kwargs)
 393
 394     def form_args(self, request, obj):
 395         """Override to parse view args and give additional args to the form."""
 396         return (obj,), {}
 397
 398     def validate_object(self, obj, request):
 399         book = obj
 400         if book.preview and not Membership_is_active_for(request.user):
 401             return HttpResponseRedirect(book.get_absolute_url())
 402         return super(CustomPDFFormView, self).validate_object(obj, request)
 403
 404     def get_object(self, request, slug, *args, **kwargs):
 405         book = get_object_or_404(Book, slug=slug)
 406         return book
 407
 408     def context_description(self, request, obj):
 409         return obj.pretty_title()
 410
 411
 412 def tag_catalogue(request, category):
 413     if category == 'theme':
 414         tags = Tag.objects.usage_for_model(
 415             Fragment, counts=True).filter(category='theme')
 416     else:
 417         tags = list(get_top_level_related_tags((), categories=(category,)))
 418
 419     described_tags = [tag for tag in tags if tag.description]
 420
 421     if len(described_tags) > 4:
 422         best = random.sample(described_tags, 4)
 423     else:
 424         best = described_tags
 425
 426     return render(request, 'catalogue/tag_catalogue.html', {
 427         'tags': tags,
 428         'best': best,
 429         'title': constants.CATEGORIES_NAME_PLURAL[category],
 430         'whole_category': constants.WHOLE_CATEGORY[category],
 431         'active_menu_item': 'theme' if category == 'theme' else None,
 432     })
 433
 434
 435 def collections(request):
 436     objects = Collection.objects.all()
 437
 438     if len(objects) > 3:
 439         best = random.sample(list(objects), 3)
 440     else:
 441         best = objects
 442
 443     return render(request, 'catalogue/collections.html', {
 444         'objects': objects,
 445         'best': best,
 446     })
 447
 448
 449 def ridero_cover(request, slug):
 450     from librarian.cover import make_cover
 451     wldoc = Book.objects.get(slug=slug).wldocument()
 452     cover = make_cover(wldoc.book_info, width=980, bleed=20, format='PNG')
 453     response = HttpResponse(content_type="image/png")
 454     cover.save(response)
 455     return response
 456
 457
 458 def get_isbn(request, book_format, slug):
 459     book = Book.objects.get(slug=slug)
 460     return HttpResponse(book.extra_info.get('isbn_%s' % book_format))