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 import RequestContext
  11 from django.template.loader import render_to_string
  12 from django.shortcuts import render_to_response, get_object_or_404, render, redirect
  13 from django.http import HttpResponse, HttpResponseRedirect, Http404, HttpResponsePermanentRedirect
  14 from django.core.urlresolvers import reverse
  15 from django.db.models import Q, QuerySet
  16 from django.contrib.auth.decorators import login_required, user_passes_test
  17 from django.utils.http import urlquote_plus
  18 from django.utils import translation
  19 from django.utils.translation import ugettext as _, ugettext_lazy
  20
  21 from ajaxable.utils import AjaxableFormView
  22 from pdcounter import views as pdcounter_views
  23 from paypal.rest import user_is_subscribed
  24 from picture.models import Picture, PictureArea
  25 from ssify import ssi_included, ssi_expect, SsiVariable as Var
  26 from catalogue import constants
  27 from catalogue import forms
  28 from catalogue.helpers import get_top_level_related_tags
  29 from catalogue.models import Book, Collection, Tag, Fragment
  30 from catalogue.utils import split_tags
  31 from catalogue.models.tag import prefetch_relations
  32 from wolnelektury.utils import is_crawler
  33
  34 staff_required = user_passes_test(lambda user: user.is_staff)
  35
  36
  37 def catalogue(request):
  38     return render(request, 'catalogue/catalogue.html', {
  39         'books': Book.objects.filter(parent=None),
  40         'pictures': Picture.objects.all(),
  41         'collections': Collection.objects.all(),
  42         'active_menu_item': 'all_works',
  43     })
  44
  45
  46 def book_list(request, filters=None, template_name='catalogue/book_list.html',
  47               nav_template_name='catalogue/snippets/book_list_nav.html',
  48               list_template_name='catalogue/snippets/book_list.html'):
  49     """ generates a listing of all books, optionally filtered """
  50     books_by_author, orphans, books_by_parent = Book.book_list(filters)
  51     books_nav = OrderedDict()
  52     for tag in books_by_author:
  53         if books_by_author[tag]:
  54             books_nav.setdefault(tag.sort_key[0], []).append(tag)
  55     return render_to_response(template_name, {
  56         'rendered_nav': render_to_string(nav_template_name, {'books_nav': books_nav}),
  57         'rendered_book_list': render_to_string(list_template_name, {
  58             'books_by_author': books_by_author,
  59             'orphans': orphans,
  60             'books_by_parent': books_by_parent,
  61         })
  62     }, context_instance=RequestContext(request))
  63
  64
  65 def daisy_list(request):
  66     return book_list(request, Q(media__type='daisy'), template_name='catalogue/daisy_list.html')
  67
  68
  69 def collection(request, slug):
  70     coll = get_object_or_404(Collection, slug=slug)
  71     return render(request, 'catalogue/collection.html', {'collection': coll})
  72
  73
  74 def differentiate_tags(request, tags, ambiguous_slugs):
  75     beginning = '/'.join(tag.url_chunk for tag in tags)
  76     unparsed = '/'.join(ambiguous_slugs[1:])
  77     options = []
  78     for tag in Tag.objects.filter(slug=ambiguous_slugs[0]):
  79         options.append({
  80             'url_args': '/'.join((beginning, tag.url_chunk, unparsed)).strip('/'),
  81             'tags': [tag]
  82         })
  83     return render_to_response(
  84         'catalogue/differentiate_tags.html', {'tags': tags, 'options': options, 'unparsed': ambiguous_slugs[1:]},
  85         context_instance=RequestContext(request))
  86
  87
  88 def object_list(request, objects, fragments=None, related_tags=None, tags=None, 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(objects, counts=True).exclude(category='set').exclude(pk__in=tag_ids))
  99     if not (extra and extra.get('theme_is_set')):
 100         if fragments is None:
 101             if list_type == 'gallery':
 102                 fragments = PictureArea.objects.filter(picture__in=objects)
 103             else:
 104                 fragments = Fragment.objects.filter(book__in=objects)
 105         related_tag_lists.append(
 106             Tag.objects.usage_for_queryset(fragments, counts=True).filter(category='theme').exclude(pk__in=tag_ids)
 107             .only('name', 'sort_key', 'category', 'slug'))
 108         if isinstance(objects, QuerySet):
 109             objects = prefetch_relations(objects, 'author')
 110
 111     categories = split_tags(*related_tag_lists)
 112
 113     objects = list(objects)
 114
 115     if not objects and len(tags) == 1 and list_type == 'books':
 116         if PictureArea.tagged.with_any(tags).exists() or Picture.tagged.with_any(tags).exists():
 117             return redirect('tagged_object_list_gallery', '/'.join(tag.url_chunk for tag in tags))
 118
 119     if len(objects) > 3:
 120         best = random.sample(objects, 3)
 121     else:
 122         best = objects
 123
 124     result = {
 125         'object_list': objects,
 126         'categories': categories,
 127         'list_type': list_type,
 128         'tags': tags,
 129
 130         'formats_form': forms.DownloadFormatsForm(),
 131         'best': best,
 132         'active_menu_item': list_type,
 133     }
 134     if extra:
 135         result.update(extra)
 136     return render_to_response(
 137         'catalogue/tagged_object_list.html', result,
 138         context_instance=RequestContext(request))
 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_to_response('catalogue/book_fragments.html', {
 262         'book': book,
 263         'theme': theme,
 264         'fragments': fragments,
 265         'active_menu_item': 'books',
 266     }, context_instance=RequestContext(request))
 267
 268
 269 def book_detail(request, slug):
 270     try:
 271         book = Book.objects.get(slug=slug)
 272     except Book.DoesNotExist:
 273         return pdcounter_views.book_stub_detail(request, slug)
 274
 275     return render_to_response('catalogue/book_detail.html', {
 276         'book': book,
 277         'book_children': book.children.all().order_by('parent_number', 'sort_key'),
 278         'active_menu_item': 'books',
 279     }, context_instance=RequestContext(request))
 280
 281
 282 # używane w publicznym interfejsie
 283 def player(request, slug):
 284     book = get_object_or_404(Book, slug=slug)
 285     if not book.has_media('mp3'):
 286         raise Http404
 287
 288     audiobooks, projects = book.get_audiobooks()
 289
 290     return render_to_response('catalogue/player.html', {
 291         'book': book,
 292         'audiobook': '',
 293         'audiobooks': audiobooks,
 294         'projects': projects,
 295     }, context_instance=RequestContext(request))
 296
 297
 298 def book_text(request, slug):
 299     book = get_object_or_404(Book, slug=slug)
 300
 301     if book.preview and not user_is_subscribed(request.user):
 302         return HttpResponseRedirect(book.get_absolute_url())
 303
 304     if not book.has_html_file():
 305         raise Http404
 306     return render_to_response('catalogue/book_text.html', {'book': book}, context_instance=RequestContext(request))
 307
 308
 309 # =========
 310 # = Admin =
 311 # =========
 312 @login_required
 313 @staff_required
 314 def import_book(request):
 315     """docstring for import_book"""
 316     book_import_form = forms.BookImportForm(request.POST, request.FILES)
 317     if book_import_form.is_valid():
 318         try:
 319             book_import_form.save()
 320         except:
 321             import sys
 322             import pprint
 323             import traceback
 324             info = sys.exc_info()
 325             exception = pprint.pformat(info[1])
 326             tb = '\n'.join(traceback.format_tb(info[2]))
 327             return HttpResponse(
 328                     _("An error occurred: %(exception)s\n\n%(tb)s") % {'exception': exception, 'tb': tb},
 329                     mimetype='text/plain')
 330         return HttpResponse(_("Book imported successfully"))
 331     else:
 332         return HttpResponse(_("Error importing file: %r") % book_import_form.errors)
 333
 334
 335 # info views for API
 336
 337 def book_info(request, book_id, lang='pl'):
 338     book = get_object_or_404(Book, id=book_id)
 339     # set language by hand
 340     translation.activate(lang)
 341     return render_to_response('catalogue/book_info.html', {'book': book}, context_instance=RequestContext(request))
 342
 343
 344 def tag_info(request, tag_id):
 345     tag = get_object_or_404(Tag, id=tag_id)
 346     return HttpResponse(tag.description)
 347
 348
 349 def embargo_link(request, format_, slug):
 350     book = get_object_or_404(Book, slug=slug)
 351     if format_ not in Book.formats:
 352         raise Http404
 353     media_file = book.get_media(format_)
 354     if not book.preview:
 355         return HttpResponseRedirect(media_file.url)
 356     if not user_is_subscribed(request.user):
 357         return HttpResponseRedirect(book.get_absolute_url())
 358     return HttpResponse(media_file, content_type=constants.EBOOK_CONTENT_TYPES[format_])
 359
 360
 361 def download_zip(request, format, slug=None):
 362     if format in Book.ebook_formats:
 363         url = Book.zip_format(format)
 364     elif format in ('mp3', 'ogg') and slug is not None:
 365         book = get_object_or_404(Book, slug=slug)
 366         url = book.zip_audiobooks(format)
 367     else:
 368         raise Http404('No format specified for zip package')
 369     return HttpResponseRedirect(urlquote_plus(settings.MEDIA_URL + url, safe='/?='))
 370
 371
 372 class CustomPDFFormView(AjaxableFormView):
 373     form_class = forms.CustomPDFForm
 374     title = ugettext_lazy('Download custom PDF')
 375     submit = ugettext_lazy('Download')
 376     template = 'catalogue/custom_pdf_form.html'
 377     honeypot = True
 378
 379     def __call__(self, *args, **kwargs):
 380         if settings.NO_CUSTOM_PDF:
 381             raise Http404('Custom PDF is disabled')
 382         return super(CustomPDFFormView, self).__call__(*args, **kwargs)
 383
 384     def form_args(self, request, obj):
 385         """Override to parse view args and give additional args to the form."""
 386         return (obj,), {}
 387
 388     def validate_object(self, obj, request):
 389         book = obj
 390         if book.preview and not user_is_subscribed(request.user):
 391             return HttpResponseRedirect(book.get_absolute_url())
 392         return super(CustomPDFFormView, self).validate_object(obj, request)
 393
 394     def get_object(self, request, slug, *args, **kwargs):
 395         book = get_object_or_404(Book, slug=slug)
 396         return book
 397
 398     def context_description(self, request, obj):
 399         return obj.pretty_title()
 400
 401
 402 ####
 403 # Includes
 404 ####
 405
 406
 407 @ssi_included
 408 def book_mini(request, pk, with_link=True):
 409     # book = get_object_or_404(Book, pk=pk)
 410     try:
 411         book = Book.objects.only('cover_thumb', 'title', 'language', 'slug').get(pk=pk)
 412     except Book.DoesNotExist:
 413         raise Http404
 414     return render(request, 'catalogue/book_mini_box.html', {
 415         'book': book,
 416         'no_link': not with_link,
 417     })
 418
 419
 420 @ssi_included(get_ssi_vars=lambda pk: (lambda ipk: (
 421         ('ssify.get_csrf_token',),
 422         ('social_tags.likes_book', (ipk,)),
 423         ('social_tags.book_shelf_tags', (ipk,)),
 424     ))(ssi_expect(pk, int)))
 425 def book_short(request, pk):
 426     book = get_object_or_404(Book, pk=pk)
 427
 428     return render(request, 'catalogue/book_short.html', {
 429         'book': book,
 430     })
 431
 432
 433 @ssi_included(
 434     get_ssi_vars=lambda pk: book_short.get_ssi_vars(pk) +
 435     (lambda ipk: (
 436         ('social_tags.choose_cite', [ipk]),
 437         ('catalogue_tags.choose_fragment', [ipk], {
 438             'unless': Var('social_tags.choose_cite', [ipk])}),
 439     ))(ssi_expect(pk, int)))
 440 def book_wide(request, pk):
 441     book = get_object_or_404(Book, pk=pk)
 442
 443     return render(request, 'catalogue/book_wide.html', {
 444         'book': book,
 445     })
 446
 447
 448 @ssi_included
 449 def fragment_short(request, pk):
 450     fragment = get_object_or_404(Fragment, pk=pk)
 451     return render(request, 'catalogue/fragment_short.html', {'fragment': fragment})
 452
 453
 454 @ssi_included
 455 def fragment_promo(request, pk):
 456     fragment = get_object_or_404(Fragment, pk=pk)
 457     return render(request, 'catalogue/fragment_promo.html', {'fragment': fragment})
 458
 459
 460 @ssi_included
 461 def tag_box(request, pk):
 462     tag = get_object_or_404(Tag, pk=pk)
 463     assert tag.category != 'set'
 464
 465     return render(request, 'catalogue/tag_box.html', {
 466         'tag': tag,
 467     })
 468
 469
 470 @ssi_included
 471 def collection_box(request, pk):
 472     collection = get_object_or_404(Collection, pk=pk)
 473
 474     return render(request, 'catalogue/collection_box.html', {
 475         'collection': collection,
 476     })
 477
 478
 479 def tag_catalogue(request, category):
 480     if category == 'theme':
 481         tags = Tag.objects.usage_for_model(
 482             Fragment, counts=True).filter(category='theme')
 483     else:
 484         tags = list(get_top_level_related_tags((), categories=(category,)))
 485
 486     described_tags = [tag for tag in tags if tag.description]
 487
 488     if len(described_tags) > 4:
 489         best = random.sample(described_tags, 4)
 490     else:
 491         best = described_tags
 492
 493     return render(request, 'catalogue/tag_catalogue.html', {
 494         'tags': tags,
 495         'best': best,
 496         'title': constants.CATEGORIES_NAME_PLURAL[category],
 497         'whole_category': constants.WHOLE_CATEGORY[category],
 498         'active_menu_item': 'theme' if category == 'theme' else None,
 499     })
 500
 501
 502 def collections(request):
 503     objects = Collection.objects.all()
 504
 505     if len(objects) > 3:
 506         best = random.sample(objects, 3)
 507     else:
 508         best = objects
 509
 510     return render(request, 'catalogue/collections.html', {
 511         'objects': objects,
 512         'best': best,
 513     })
 514
 515
 516 def ridero_cover(request, slug):
 517     from librarian.cover import make_cover
 518     wldoc = Book.objects.get(slug=slug).wldocument()
 519     cover = make_cover(wldoc.book_info, width=980, bleed=20, format='PNG')
 520     response = HttpResponse(content_type="image/png")
 521     cover.save(response)
 522     return response
 523
 524
 525 def get_isbn(request, book_format, slug):
 526     book = Book.objects.get(slug=slug)
 527     return HttpResponse(book.extra_info.get('isbn_%s' % book_format))