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.models import Membership
  21 from annoy.models import DynamicTextInsert
  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
  31 staff_required = user_passes_test(lambda user: user.is_staff)
  32
  33
  34 def catalogue(request):
  35     return render(request, 'catalogue/catalogue.html', {
  36         'books': Book.objects.filter(findable=True, parent=None),
  37         'pictures': Picture.objects.all(),
  38         'collections': Collection.objects.all(),
  39         'active_menu_item': 'all_works',
  40     })
  41
  42
  43 def book_list(request, filters=None, template_name='catalogue/book_list.html',
  44               nav_template_name='catalogue/snippets/book_list_nav.html',
  45               list_template_name='catalogue/snippets/book_list.html'):
  46     """ generates a listing of all books, optionally filtered """
  47     books_by_author, orphans, books_by_parent = Book.book_list(filters)
  48     books_nav = OrderedDict()
  49     for tag in books_by_author:
  50         if books_by_author[tag]:
  51             books_nav.setdefault(tag.sort_key[0], []).append(tag)
  52     return render(request, template_name, {
  53         'rendered_nav': render_to_string(nav_template_name, {'books_nav': books_nav}),
  54         'rendered_book_list': render_to_string(list_template_name, {
  55             'books_by_author': books_by_author,
  56             'orphans': orphans,
  57             'books_by_parent': books_by_parent,
  58         })
  59     })
  60
  61
  62 def daisy_list(request):
  63     return book_list(request, Q(media__type='daisy'), template_name='catalogue/daisy_list.html')
  64
  65
  66 def collection(request, slug):
  67     coll = get_object_or_404(Collection, slug=slug)
  68     return render(request, 'catalogue/collection.html', {'collection': coll})
  69
  70
  71 def differentiate_tags(request, tags, ambiguous_slugs):
  72     beginning = '/'.join(tag.url_chunk for tag in tags)
  73     unparsed = '/'.join(ambiguous_slugs[1:])
  74     options = []
  75     for tag in Tag.objects.filter(slug=ambiguous_slugs[0]):
  76         options.append({
  77             'url_args': '/'.join((beginning, tag.url_chunk, unparsed)).strip('/'),
  78             'tags': [tag]
  79         })
  80     return render(
  81         request,
  82         'catalogue/differentiate_tags.html',
  83         {'tags': tags, 'options': options, 'unparsed': ambiguous_slugs[1:]}
  84     )
  85
  86
  87 def object_list(request, objects, fragments=None, related_tags=None, tags=None,
  88                 list_type='books', extra=None):
  89     if not tags:
  90         tags = []
  91     tag_ids = [tag.pk for tag in tags]
  92
  93     related_tag_lists = []
  94     if related_tags:
  95         related_tag_lists.append(related_tags)
  96     else:
  97         related_tag_lists.append(
  98             Tag.objects.usage_for_queryset(
  99                 objects, counts=True
 100             ).exclude(category='set').exclude(pk__in=tag_ids))
 101     if not (extra and extra.get('theme_is_set')):
 102         if fragments is None:
 103             if list_type == 'gallery':
 104                 fragments = PictureArea.objects.filter(picture__in=objects)
 105             else:
 106                 fragments = Fragment.objects.filter(book__in=objects)
 107         related_tag_lists.append(
 108             Tag.objects.usage_for_queryset(
 109                 fragments, counts=True
 110             ).filter(category='theme').exclude(pk__in=tag_ids)
 111             .only('name', 'sort_key', 'category', 'slug'))
 112         if isinstance(objects, QuerySet):
 113             objects = prefetch_relations(objects, 'author')
 114
 115     categories = split_tags(*related_tag_lists)
 116
 117     objects = list(objects)
 118
 119     if not objects and len(tags) == 1 and list_type == 'books':
 120         if PictureArea.tagged.with_any(tags).exists() or Picture.tagged.with_any(tags).exists():
 121             return redirect('tagged_object_list_gallery', '/'.join(tag.url_chunk for tag in tags))
 122
 123     if len(objects) > 3:
 124         best = random.sample(objects, 3)
 125     else:
 126         best = objects
 127
 128     result = {
 129         'object_list': objects,
 130         'categories': categories,
 131         'list_type': list_type,
 132         'tags': tags,
 133
 134         'formats_form': forms.DownloadFormatsForm(),
 135         'best': best,
 136         'active_menu_item': list_type,
 137     }
 138     if extra:
 139         result.update(extra)
 140     return render(
 141         request,
 142         'catalogue/tagged_object_list.html', result,
 143     )
 144
 145
 146 def literature(request):
 147     books = Book.objects.filter(parent=None, findable=True)
 148     return object_list(request, books, related_tags=get_top_level_related_tags([]))
 149
 150
 151 def gallery(request):
 152     return object_list(request, Picture.objects.all(), list_type='gallery')
 153
 154
 155 def audiobooks(request):
 156     audiobooks = Book.objects.filter(findable=True, media__type__in=('mp3', 'ogg')).distinct()
 157     return object_list(request, audiobooks, list_type='audiobooks', extra={
 158         'daisy': Book.objects.filter(findable=True, media__type='daisy').distinct(),
 159     })
 160
 161
 162 class ResponseInstead(Exception):
 163     def __init__(self, response):
 164         super(ResponseInstead, self).__init__()
 165         self.response = response
 166
 167
 168 def analyse_tags(request, tag_str):
 169     try:
 170         tags = Tag.get_tag_list(tag_str)
 171     except Tag.DoesNotExist:
 172         # Perhaps the user is asking about an author in Public Domain
 173         # counter (they are not represented in tags)
 174         chunks = tag_str.split('/')
 175         if len(chunks) == 2 and chunks[0] == 'autor':
 176             raise ResponseInstead(pdcounter_views.author_detail(request, chunks[1]))
 177         raise Http404
 178     except Tag.MultipleObjectsReturned as e:
 179         # Ask the user to disambiguate
 180         raise ResponseInstead(differentiate_tags(request, e.tags, e.ambiguous_slugs))
 181     except Tag.UrlDeprecationWarning as e:
 182         raise ResponseInstead(HttpResponsePermanentRedirect(
 183             reverse('tagged_object_list', args=['/'.join(tag.url_chunk for tag in e.tags)])))
 184
 185     try:
 186         if len(tags) > settings.MAX_TAG_LIST:
 187             raise Http404
 188     except AttributeError:
 189         pass
 190
 191     return tags
 192
 193
 194 def theme_list(request, tags, list_type):
 195     shelf_tags = [tag for tag in tags if tag.category == 'set']
 196     fragment_tags = [tag for tag in tags if tag.category != 'set']
 197     if list_type == 'gallery':
 198         fragments = PictureArea.tagged.with_all(fragment_tags)
 199     else:
 200         fragments = Fragment.tagged.with_all(fragment_tags)
 201
 202     if shelf_tags:
 203         # TODO: Pictures on shelves not supported yet.
 204         books = Book.tagged.with_all(shelf_tags).order_by()
 205         fragments = fragments.filter(Q(book__in=books) | Q(book__ancestor__in=books))
 206     elif list_type == 'books':
 207         fragments = fragments.filter(book__findable=True)
 208
 209     if not fragments and len(tags) == 1 and list_type == 'books':
 210         if PictureArea.tagged.with_any(tags).exists() or Picture.tagged.with_any(tags).exists():
 211             return redirect('tagged_object_list_gallery', '/'.join(tag.url_chunk for tag in tags))
 212
 213     return object_list(request, fragments, tags=tags, list_type=list_type, extra={
 214         'theme_is_set': True,
 215         'active_menu_item': 'theme',
 216     })
 217
 218
 219 def tagged_object_list(request, tags, list_type):
 220     try:
 221         tags = analyse_tags(request, tags)
 222     except ResponseInstead as e:
 223         return e.response
 224
 225     if list_type == 'gallery' and any(tag.category == 'set' for tag in tags):
 226         raise Http404
 227
 228     if any(tag.category in ('theme', 'thing') for tag in tags):
 229         return theme_list(request, tags, list_type=list_type)
 230
 231     if list_type == 'books':
 232         books = Book.tagged.with_all(tags)
 233
 234         if any(tag.category == 'set' for tag in tags):
 235             params = {'objects': books}
 236         else:
 237             books = books.filter(findable=True)
 238             params = {
 239                 'objects': Book.tagged_top_level(tags).filter(findable=True),
 240                 'fragments': Fragment.objects.filter(book__in=books),
 241                 'related_tags': get_top_level_related_tags(tags),
 242             }
 243     elif list_type == 'gallery':
 244         params = {'objects': Picture.tagged.with_all(tags)}
 245     elif list_type == 'audiobooks':
 246         audiobooks = Book.objects.filter(findable=True, media__type__in=('mp3', 'ogg')).distinct()
 247         params = {
 248             'objects': Book.tagged.with_all(tags, audiobooks),
 249             'extra': {
 250                 'daisy': Book.tagged.with_all(
 251                     tags, audiobooks.filter(media__type='daisy').distinct()
 252                 ),
 253             }
 254         }
 255     else:
 256         raise Http404
 257
 258     return object_list(request, tags=tags, list_type=list_type, **params)
 259
 260
 261 def book_fragments(request, slug, theme_slug):
 262     book = get_object_or_404(Book, slug=slug)
 263     theme = get_object_or_404(Tag, slug=theme_slug, category='theme')
 264     fragments = Fragment.tagged.with_all([theme]).filter(
 265         Q(book=book) | Q(book__ancestor=book))
 266
 267     return render(
 268         request,
 269         'catalogue/book_fragments.html',
 270         {
 271             'book': book,
 272             'theme': theme,
 273             'fragments': fragments,
 274             'active_menu_item': 'books',
 275         })
 276
 277
 278 @never_cache
 279 def book_detail(request, slug):
 280     try:
 281         book = Book.objects.get(slug=slug)
 282     except Book.DoesNotExist:
 283         return pdcounter_views.book_stub_detail(request, slug)
 284
 285     return render(
 286         request,
 287         'catalogue/book_detail.html',
 288         {
 289             'book': book,
 290             'book_children': book.children.all().order_by('parent_number', 'sort_key'),
 291             'active_menu_item': 'books',
 292         })
 293
 294
 295 # używane w publicznym interfejsie
 296 def player(request, slug):
 297     book = get_object_or_404(Book, slug=slug)
 298     if not book.has_media('mp3'):
 299         raise Http404
 300
 301     audiobooks, projects = book.get_audiobooks()
 302
 303     return render(
 304         request,
 305         'catalogue/player.html',
 306         {
 307             'book': book,
 308             'audiobook': '',
 309             'audiobooks': audiobooks,
 310             'projects': projects,
 311         })
 312
 313
 314 def book_text(request, slug):
 315     book = get_object_or_404(Book, slug=slug)
 316
 317     if book.preview and not Membership.is_active_for(request.user):
 318         return HttpResponseRedirect(book.get_absolute_url())
 319
 320     if not book.has_html_file():
 321         raise Http404
 322     with book.html_file.open('r') as f:
 323         book_text = f.read()
 324
 325     return render(request, 'catalogue/book_text.html', {
 326         'book': book,
 327         'book_text': book_text,
 328         'inserts': DynamicTextInsert.get_all(request)
 329     })
 330
 331
 332 # =========
 333 # = Admin =
 334 # =========
 335 @login_required
 336 @staff_required
 337 def import_book(request):
 338     """docstring for import_book"""
 339     book_import_form = forms.BookImportForm(request.POST, request.FILES)
 340     if book_import_form.is_valid():
 341         try:
 342             book_import_form.save()
 343         except:
 344             import sys
 345             import pprint
 346             import traceback
 347             info = sys.exc_info()
 348             exception = pprint.pformat(info[1])
 349             tb = '\n'.join(traceback.format_tb(info[2]))
 350             return HttpResponse(
 351                 _("An error occurred: %(exception)s\n\n%(tb)s") % {
 352                     'exception': exception, 'tb': tb
 353                 },
 354                 mimetype='text/plain'
 355             )
 356         return HttpResponse(_("Book imported successfully"))
 357     return HttpResponse(_("Error importing file: %r") % book_import_form.errors)
 358
 359
 360 # info views for API
 361
 362 def book_info(request, book_id, lang='pl'):
 363     book = get_object_or_404(Book, id=book_id)
 364     # set language by hand
 365     translation.activate(lang)
 366     return render(request, 'catalogue/book_info.html', {'book': book})
 367
 368
 369 def tag_info(request, tag_id):
 370     tag = get_object_or_404(Tag, id=tag_id)
 371     return HttpResponse(tag.description)
 372
 373
 374 @never_cache
 375 def embargo_link(request, key, format_, slug):
 376     book = get_object_or_404(Book, slug=slug)
 377     if format_ not in Book.formats:
 378         raise Http404
 379     if key != book.preview_key:
 380         raise Http404
 381     media_file = book.get_media(format_)
 382     if not book.preview:
 383         return HttpResponseRedirect(media_file.url)
 384     return HttpResponse(media_file, content_type=constants.EBOOK_CONTENT_TYPES[format_])
 385
 386
 387 def download_zip(request, format, slug=None):
 388     if format in Book.ebook_formats:
 389         url = Book.zip_format(format)
 390     elif format in ('mp3', 'ogg') and slug is not None:
 391         book = get_object_or_404(Book, slug=slug)
 392         url = book.zip_audiobooks(format)
 393     else:
 394         raise Http404('No format specified for zip package')
 395     return HttpResponseRedirect(urlquote_plus(settings.MEDIA_URL + url, safe='/?='))
 396
 397
 398 class CustomPDFFormView(AjaxableFormView):
 399     form_class = forms.CustomPDFForm
 400     title = ugettext_lazy('Download custom PDF')
 401     submit = ugettext_lazy('Download')
 402     template = 'catalogue/custom_pdf_form.html'
 403     honeypot = True
 404
 405     def __call__(self, *args, **kwargs):
 406         if settings.NO_CUSTOM_PDF:
 407             raise Http404('Custom PDF is disabled')
 408         return super(CustomPDFFormView, self).__call__(*args, **kwargs)
 409
 410     def form_args(self, request, obj):
 411         """Override to parse view args and give additional args to the form."""
 412         return (obj,), {}
 413
 414     def validate_object(self, obj, request):
 415         book = obj
 416         if book.preview and not Membership.is_active_for(request.user):
 417             return HttpResponseRedirect(book.get_absolute_url())
 418         return super(CustomPDFFormView, self).validate_object(obj, request)
 419
 420     def get_object(self, request, slug, *args, **kwargs):
 421         book = get_object_or_404(Book, slug=slug)
 422         return book
 423
 424     def context_description(self, request, obj):
 425         return obj.pretty_title()
 426
 427
 428 def tag_catalogue(request, category):
 429     if category == 'theme':
 430         tags = Tag.objects.usage_for_model(
 431             Fragment, counts=True).filter(category='theme')
 432     else:
 433         tags = list(get_top_level_related_tags((), categories=(category,)))
 434
 435     described_tags = [tag for tag in tags if tag.description]
 436
 437     if len(described_tags) > 4:
 438         best = random.sample(described_tags, 4)
 439     else:
 440         best = described_tags
 441
 442     return render(request, 'catalogue/tag_catalogue.html', {
 443         'tags': tags,
 444         'best': best,
 445         'title': constants.CATEGORIES_NAME_PLURAL[category],
 446         'whole_category': constants.WHOLE_CATEGORY[category],
 447         'active_menu_item': 'theme' if category == 'theme' else None,
 448     })
 449
 450
 451 def collections(request):
 452     objects = Collection.objects.all()
 453
 454     if len(objects) > 3:
 455         best = random.sample(list(objects), 3)
 456     else:
 457         best = objects
 458
 459     return render(request, 'catalogue/collections.html', {
 460         'objects': objects,
 461         'best': best,
 462     })
 463
 464
 465 def ridero_cover(request, slug):
 466     from librarian.cover import make_cover
 467     wldoc = Book.objects.get(slug=slug).wldocument()
 468     cover = make_cover(wldoc.book_info, width=980, bleed=20, format='PNG')
 469     response = HttpResponse(content_type="image/png")
 470     cover.save(response)
 471     return response
 472
 473
 474 def get_isbn(request, book_format, slug):
 475     book = Book.objects.get(slug=slug)
 476     return HttpResponse(book.get_extra_info_json().get('isbn_%s' % book_format))