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