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.template.loader import render_to_string
   9 from django.shortcuts import get_object_or_404, render, redirect
  10 from django.http import HttpResponse, HttpResponseRedirect, Http404, HttpResponsePermanentRedirect
  11 from django.urls import reverse
  12 from django.db.models import Q, QuerySet
  13 from django.contrib.auth.decorators import login_required, user_passes_test
  14 from django.utils.http import urlquote_plus
  15 from django.utils import translation
  16 from django.utils.translation import ugettext as _, ugettext_lazy
  17 from django.views.decorators.cache import never_cache
  18
  19 from ajaxable.utils import AjaxableFormView
  20 from club.forms import ScheduleForm
  21 from club.models import Club, 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
  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(findable=True, 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',
  84         {'tags': tags, 'options': options, 'unparsed': ambiguous_slugs[1:]}
  85     )
  86
  87
  88 def object_list(request, objects, fragments=None, related_tags=None, tags=None,
  89                 list_type='books', extra=None):
  90     if not tags:
  91         tags = []
  92     tag_ids = [tag.pk for tag in tags]
  93
  94     related_tag_lists = []
  95     if related_tags:
  96         related_tag_lists.append(related_tags)
  97     else:
  98         related_tag_lists.append(
  99             Tag.objects.usage_for_queryset(
 100                 objects, counts=True
 101             ).exclude(category='set').exclude(pk__in=tag_ids))
 102     if not (extra and extra.get('theme_is_set')):
 103         if fragments is None:
 104             if list_type == 'gallery':
 105                 fragments = PictureArea.objects.filter(picture__in=objects)
 106             else:
 107                 fragments = Fragment.objects.filter(book__in=objects)
 108         related_tag_lists.append(
 109             Tag.objects.usage_for_queryset(
 110                 fragments, counts=True
 111             ).filter(category='theme').exclude(pk__in=tag_ids)
 112             .only('name', 'sort_key', 'category', 'slug'))
 113         if isinstance(objects, QuerySet):
 114             objects = prefetch_relations(objects, 'author')
 115
 116     categories = split_tags(*related_tag_lists)
 117
 118     objects = list(objects)
 119
 120     if not objects and len(tags) == 1 and list_type == 'books':
 121         if PictureArea.tagged.with_any(tags).exists() or Picture.tagged.with_any(tags).exists():
 122             return redirect('tagged_object_list_gallery', '/'.join(tag.url_chunk for tag in tags))
 123
 124     if len(objects) > 3:
 125         best = random.sample(objects, 3)
 126     else:
 127         best = objects
 128
 129     result = {
 130         'object_list': objects,
 131         'categories': categories,
 132         'list_type': list_type,
 133         'tags': tags,
 134
 135         'formats_form': forms.DownloadFormatsForm(),
 136         'best': best,
 137         'active_menu_item': list_type,
 138     }
 139     if extra:
 140         result.update(extra)
 141     return render(
 142         request,
 143         'catalogue/tagged_object_list.html', result,
 144     )
 145
 146
 147 def literature(request):
 148     books = Book.objects.filter(parent=None, findable=True)
 149     return object_list(request, books, related_tags=get_top_level_related_tags([]))
 150
 151
 152 def gallery(request):
 153     return object_list(request, Picture.objects.all(), list_type='gallery')
 154
 155
 156 def audiobooks(request):
 157     audiobooks = Book.objects.filter(findable=True, media__type__in=('mp3', 'ogg')).distinct()
 158     return object_list(request, audiobooks, list_type='audiobooks', extra={
 159         'daisy': Book.objects.filter(findable=True, media__type='daisy').distinct(),
 160     })
 161
 162
 163 class ResponseInstead(Exception):
 164     def __init__(self, response):
 165         super(ResponseInstead, self).__init__()
 166         self.response = response
 167
 168
 169 def analyse_tags(request, tag_str):
 170     try:
 171         tags = Tag.get_tag_list(tag_str)
 172     except Tag.DoesNotExist:
 173         # Perhaps the user is asking about an author in Public Domain
 174         # counter (they are not represented in tags)
 175         chunks = tag_str.split('/')
 176         if len(chunks) == 2 and chunks[0] == 'autor':
 177             raise ResponseInstead(pdcounter_views.author_detail(request, chunks[1]))
 178         raise Http404
 179     except Tag.MultipleObjectsReturned as e:
 180         # Ask the user to disambiguate
 181         raise ResponseInstead(differentiate_tags(request, e.tags, e.ambiguous_slugs))
 182     except Tag.UrlDeprecationWarning as e:
 183         raise ResponseInstead(HttpResponsePermanentRedirect(
 184             reverse('tagged_object_list', args=['/'.join(tag.url_chunk for tag in e.tags)])))
 185
 186     try:
 187         if len(tags) > settings.MAX_TAG_LIST:
 188             raise Http404
 189     except AttributeError:
 190         pass
 191
 192     return tags
 193
 194
 195 def theme_list(request, tags, list_type):
 196     shelf_tags = [tag for tag in tags if tag.category == 'set']
 197     fragment_tags = [tag for tag in tags if tag.category != 'set']
 198     if list_type == 'gallery':
 199         fragments = PictureArea.tagged.with_all(fragment_tags)
 200     else:
 201         fragments = Fragment.tagged.with_all(fragment_tags)
 202
 203     if shelf_tags:
 204         # TODO: Pictures on shelves not supported yet.
 205         books = Book.tagged.with_all(shelf_tags).order_by()
 206         fragments = fragments.filter(Q(book__in=books) | Q(book__ancestor__in=books))
 207     elif list_type == 'books':
 208         fragments = fragments.filter(book__findable=True)
 209
 210     if not fragments and len(tags) == 1 and list_type == 'books':
 211         if PictureArea.tagged.with_any(tags).exists() or Picture.tagged.with_any(tags).exists():
 212             return redirect('tagged_object_list_gallery', '/'.join(tag.url_chunk for tag in tags))
 213
 214     return object_list(request, fragments, tags=tags, list_type=list_type, extra={
 215         'theme_is_set': True,
 216         'active_menu_item': 'theme',
 217     })
 218
 219
 220 def tagged_object_list(request, tags, list_type):
 221     try:
 222         tags = analyse_tags(request, tags)
 223     except ResponseInstead as e:
 224         return e.response
 225
 226     if list_type == 'gallery' and any(tag.category == 'set' for tag in tags):
 227         raise Http404
 228
 229     if any(tag.category in ('theme', 'thing') for tag in tags):
 230         return theme_list(request, tags, list_type=list_type)
 231
 232     if list_type == 'books':
 233         books = Book.tagged.with_all(tags)
 234
 235         if any(tag.category == 'set' for tag in tags):
 236             params = {'objects': books}
 237         else:
 238             books = books.filter(findable=True)
 239             params = {
 240                 'objects': Book.tagged_top_level(tags).filter(findable=True),
 241                 'fragments': Fragment.objects.filter(book__in=books),
 242                 'related_tags': get_top_level_related_tags(tags),
 243             }
 244     elif list_type == 'gallery':
 245         params = {'objects': Picture.tagged.with_all(tags)}
 246     elif list_type == 'audiobooks':
 247         audiobooks = Book.objects.filter(findable=True, media__type__in=('mp3', 'ogg')).distinct()
 248         params = {
 249             'objects': Book.tagged.with_all(tags, audiobooks),
 250             'extra': {
 251                 'daisy': Book.tagged.with_all(
 252                     tags, audiobooks.filter(media__type='daisy').distinct()
 253                 ),
 254             }
 255         }
 256     else:
 257         raise Http404
 258
 259     return object_list(request, tags=tags, list_type=list_type, **params)
 260
 261
 262 def book_fragments(request, slug, theme_slug):
 263     book = get_object_or_404(Book, slug=slug)
 264     theme = get_object_or_404(Tag, slug=theme_slug, category='theme')
 265     fragments = Fragment.tagged.with_all([theme]).filter(
 266         Q(book=book) | Q(book__ancestor=book))
 267
 268     return render(
 269         request,
 270         'catalogue/book_fragments.html',
 271         {
 272             'book': book,
 273             'theme': theme,
 274             'fragments': fragments,
 275             'active_menu_item': 'books',
 276         })
 277
 278
 279 @never_cache
 280 def book_detail(request, slug):
 281     try:
 282         book = Book.objects.get(slug=slug)
 283     except Book.DoesNotExist:
 284         return pdcounter_views.book_stub_detail(request, slug)
 285
 286     return render(
 287         request,
 288         'catalogue/book_detail.html',
 289         {
 290             'book': book,
 291             'book_children': book.children.all().order_by('parent_number', 'sort_key'),
 292             'active_menu_item': 'books',
 293             'club_form': ScheduleForm() if book.preview else None,
 294             'club': Club.objects.first() if book.preview else None,
 295         })
 296
 297
 298 # używane w publicznym interfejsie
 299 def player(request, slug):
 300     book = get_object_or_404(Book, slug=slug)
 301     if not book.has_media('mp3'):
 302         raise Http404
 303
 304     audiobooks, projects = book.get_audiobooks()
 305
 306     return render(
 307         request,
 308         'catalogue/player.html',
 309         {
 310             'book': book,
 311             'audiobook': '',
 312             'audiobooks': audiobooks,
 313             'projects': projects,
 314         })
 315
 316
 317 def book_text(request, slug):
 318     book = get_object_or_404(Book, slug=slug)
 319
 320     if book.preview and not Membership.is_active_for(request.user):
 321         return HttpResponseRedirect(book.get_absolute_url())
 322
 323     if not book.has_html_file():
 324         raise Http404
 325     with book.html_file.open('r') as f:
 326         book_text = f.read()
 327
 328     return render(request, 'catalogue/book_text.html', {
 329         'book': book,
 330         'book_text': book_text,
 331         'inserts': DynamicTextInsert.get_all(request)
 332     })
 333
 334
 335 # =========
 336 # = Admin =
 337 # =========
 338 @login_required
 339 @staff_required
 340 def import_book(request):
 341     """docstring for import_book"""
 342     book_import_form = forms.BookImportForm(request.POST, request.FILES)
 343     if book_import_form.is_valid():
 344         try:
 345             book_import_form.save()
 346         except:
 347             import sys
 348             import pprint
 349             import traceback
 350             info = sys.exc_info()
 351             exception = pprint.pformat(info[1])
 352             tb = '\n'.join(traceback.format_tb(info[2]))
 353             return HttpResponse(
 354                 _("An error occurred: %(exception)s\n\n%(tb)s") % {
 355                     'exception': exception, 'tb': tb
 356                 },
 357                 content_type='text/plain'
 358             )
 359         return HttpResponse(_("Book imported successfully"))
 360     return HttpResponse(_("Error importing file: %r") % book_import_form.errors)
 361
 362
 363 # info views for API
 364
 365 def book_info(request, book_id, lang='pl'):
 366     book = get_object_or_404(Book, id=book_id)
 367     # set language by hand
 368     translation.activate(lang)
 369     return render(request, 'catalogue/book_info.html', {'book': book})
 370
 371
 372 def tag_info(request, tag_id):
 373     tag = get_object_or_404(Tag, id=tag_id)
 374     return HttpResponse(tag.description)
 375
 376
 377 @never_cache
 378 def embargo_link(request, key, format_, slug):
 379     book = get_object_or_404(Book, slug=slug)
 380     if format_ not in Book.formats:
 381         raise Http404
 382     if key != book.preview_key:
 383         raise Http404
 384     media_file = book.get_media(format_)
 385     if not book.preview:
 386         return HttpResponseRedirect(media_file.url)
 387     return HttpResponse(media_file, content_type=constants.EBOOK_CONTENT_TYPES[format_])
 388
 389
 390 def download_zip(request, format, slug=None):
 391     if format in Book.ebook_formats:
 392         url = Book.zip_format(format)
 393     elif format in ('mp3', 'ogg') and slug is not None:
 394         book = get_object_or_404(Book, slug=slug)
 395         url = book.zip_audiobooks(format)
 396     else:
 397         raise Http404('No format specified for zip package')
 398     return HttpResponseRedirect(urlquote_plus(settings.MEDIA_URL + url, safe='/?='))
 399
 400
 401 class CustomPDFFormView(AjaxableFormView):
 402     form_class = forms.CustomPDFForm
 403     title = ugettext_lazy('Download custom PDF')
 404     submit = ugettext_lazy('Download')
 405     template = 'catalogue/custom_pdf_form.html'
 406     honeypot = True
 407
 408     def __call__(self, *args, **kwargs):
 409         if settings.NO_CUSTOM_PDF:
 410             raise Http404('Custom PDF is disabled')
 411         return super(CustomPDFFormView, self).__call__(*args, **kwargs)
 412
 413     def form_args(self, request, obj):
 414         """Override to parse view args and give additional args to the form."""
 415         return (obj,), {}
 416
 417     def validate_object(self, obj, request):
 418         book = obj
 419         if book.preview and not Membership.is_active_for(request.user):
 420             return HttpResponseRedirect(book.get_absolute_url())
 421         return super(CustomPDFFormView, self).validate_object(obj, request)
 422
 423     def get_object(self, request, slug, *args, **kwargs):
 424         book = get_object_or_404(Book, slug=slug)
 425         return book
 426
 427     def context_description(self, request, obj):
 428         return obj.pretty_title()
 429
 430
 431 def tag_catalogue(request, category):
 432     if category == 'theme':
 433         tags = Tag.objects.usage_for_model(
 434             Fragment, counts=True).filter(category='theme')
 435     else:
 436         tags = list(get_top_level_related_tags((), categories=(category,)))
 437
 438     described_tags = [tag for tag in tags if tag.description]
 439
 440     if len(described_tags) > 4:
 441         best = random.sample(described_tags, 4)
 442     else:
 443         best = described_tags
 444
 445     return render(request, 'catalogue/tag_catalogue.html', {
 446         'tags': tags,
 447         'best': best,
 448         'title': constants.CATEGORIES_NAME_PLURAL[category],
 449         'whole_category': constants.WHOLE_CATEGORY[category],
 450         'active_menu_item': 'theme' if category == 'theme' else None,
 451     })
 452
 453
 454 def collections(request):
 455     objects = Collection.objects.all()
 456
 457     if len(objects) > 3:
 458         best = random.sample(list(objects), 3)
 459     else:
 460         best = objects
 461
 462     return render(request, 'catalogue/collections.html', {
 463         'objects': objects,
 464         'best': best,
 465     })
 466
 467
 468 def ridero_cover(request, slug):
 469     from librarian.cover import make_cover
 470     wldoc = Book.objects.get(slug=slug).wldocument()
 471     cover = make_cover(wldoc.book_info, width=980, bleed=20, format='PNG')
 472     response = HttpResponse(content_type="image/png")
 473     cover.save(response)
 474     return response
 475
 476
 477 def get_isbn(request, book_format, slug):
 478     book = Book.objects.get(slug=slug)
 479     return HttpResponse(book.get_extra_info_json().get('isbn_%s' % book_format))