apps/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 import re
   6 import itertools
   7 from datetime import datetime
   8
   9 from django.conf import settings
  10 from django.template import RequestContext
  11 from django.shortcuts import render_to_response, get_object_or_404
  12 from django.http import HttpResponse, HttpResponseRedirect, Http404, HttpResponsePermanentRedirect
  13 from django.core.urlresolvers import reverse
  14 from django.db.models import Count, Sum, Q
  15 from django.contrib.auth.decorators import login_required, user_passes_test
  16 from django.utils.datastructures import SortedDict
  17 from django.views.decorators.http import require_POST
  18 from django.contrib import auth
  19 from django.contrib.auth.forms import UserCreationForm, AuthenticationForm
  20 from django.utils.http import urlquote_plus
  21 from django.views.decorators import cache
  22 from django.utils import translation
  23 from django.utils.translation import ugettext as _
  24 from django.views.generic.list_detail import object_list
  25
  26 from ajaxable.utils import LazyEncoder, JSONResponse
  27 from catalogue import models
  28 from catalogue import forms
  29 from catalogue.utils import split_tags, AttachmentHttpResponse, async_build_pdf
  30 from catalogue.tasks import touch_tag
  31 from pdcounter import models as pdcounter_models
  32 from pdcounter import views as pdcounter_views
  33 from suggest.forms import PublishingSuggestForm
  34
  35 from os import path
  36
  37 staff_required = user_passes_test(lambda user: user.is_staff)
  38
  39
  40 def catalogue(request):
  41     tags = models.Tag.objects.exclude(
  42         category__in=('set', 'book')).exclude(book_count=0)
  43     tags = list(tags)
  44     for tag in tags:
  45         tag.count = tag.book_count
  46     categories = split_tags(tags)
  47     fragment_tags = categories.get('theme', [])
  48
  49     return render_to_response('catalogue/catalogue.html', locals(),
  50         context_instance=RequestContext(request))
  51
  52
  53 def book_list(request, filter=None, template_name='catalogue/book_list.html'):
  54     """ generates a listing of all books, optionally filtered with a test function """
  55
  56     books_by_author, orphans, books_by_parent = models.Book.book_list(filter)
  57     books_nav = SortedDict()
  58     for tag in books_by_author:
  59         if books_by_author[tag]:
  60             books_nav.setdefault(tag.sort_key[0], []).append(tag)
  61
  62     return render_to_response(template_name, locals(),
  63         context_instance=RequestContext(request))
  64
  65
  66 def audiobook_list(request):
  67     return book_list(request, Q(media__type='mp3') | Q(media__type='ogg'),
  68                      template_name='catalogue/audiobook_list.html')
  69
  70
  71 def daisy_list(request):
  72     return book_list(request, Q(media__type='daisy'),
  73                      template_name='catalogue/daisy_list.html')
  74
  75
  76 def differentiate_tags(request, tags, ambiguous_slugs):
  77     beginning = '/'.join(tag.url_chunk for tag in tags)
  78     unparsed = '/'.join(ambiguous_slugs[1:])
  79     options = []
  80     for tag in models.Tag.objects.exclude(category='book').filter(slug=ambiguous_slugs[0]):
  81         options.append({
  82             'url_args': '/'.join((beginning, tag.url_chunk, unparsed)).strip('/'),
  83             'tags': [tag]
  84         })
  85     return render_to_response('catalogue/differentiate_tags.html',
  86                 {'tags': tags, 'options': options, 'unparsed': ambiguous_slugs[1:]},
  87                 context_instance=RequestContext(request))
  88
  89
  90 def tagged_object_list(request, tags=''):
  91     try:
  92         tags = models.Tag.get_tag_list(tags)
  93     except models.Tag.DoesNotExist:
  94         chunks = tags.split('/')
  95         if len(chunks) == 2 and chunks[0] == 'autor':
  96             return pdcounter_views.author_detail(request, chunks[1])
  97         else:
  98             raise Http404
  99     except models.Tag.MultipleObjectsReturned, e:
 100         return differentiate_tags(request, e.tags, e.ambiguous_slugs)
 101     except models.Tag.UrlDeprecationWarning, e:
 102         return HttpResponsePermanentRedirect(reverse('tagged_object_list', args=['/'.join(tag.url_chunk for tag in e.tags)]))
 103
 104     try:
 105         if len(tags) > settings.MAX_TAG_LIST:
 106             raise Http404
 107     except AttributeError:
 108         pass
 109
 110     if len([tag for tag in tags if tag.category == 'book']):
 111         raise Http404
 112
 113     theme_is_set = [tag for tag in tags if tag.category == 'theme']
 114     shelf_is_set = [tag for tag in tags if tag.category == 'set']
 115     only_shelf = shelf_is_set and len(tags) == 1
 116     only_my_shelf = only_shelf and request.user.is_authenticated() and request.user == tags[0].user
 117
 118     objects = only_author = None
 119     categories = {}
 120
 121     if theme_is_set:
 122         shelf_tags = [tag for tag in tags if tag.category == 'set']
 123         fragment_tags = [tag for tag in tags if tag.category != 'set']
 124         fragments = models.Fragment.tagged.with_all(fragment_tags)
 125
 126         if shelf_tags:
 127             books = models.Book.tagged.with_all(shelf_tags).order_by()
 128             l_tags = models.Tag.objects.filter(category='book', slug__in=[book.book_tag_slug() for book in books])
 129             fragments = models.Fragment.tagged.with_any(l_tags, fragments)
 130
 131         # newtagging goes crazy if we just try:
 132         #related_tags = models.Tag.objects.usage_for_queryset(fragments, counts=True,
 133         #                    extra={'where': ["catalogue_tag.category != 'book'"]})
 134         fragment_keys = [fragment.pk for fragment in fragments]
 135         if fragment_keys:
 136             related_tags = models.Fragment.tags.usage(counts=True,
 137                                 filters={'pk__in': fragment_keys},
 138                                 extra={'where': ["catalogue_tag.category != 'book'"]})
 139             related_tags = (tag for tag in related_tags if tag not in fragment_tags)
 140             categories = split_tags(related_tags)
 141
 142             objects = fragments
 143     else:
 144         if shelf_is_set:
 145             objects = models.Book.tagged.with_all(tags)
 146         else:
 147             objects = models.Book.tagged_top_level(tags)
 148
 149         # get related tags from `tag_counter` and `theme_counter`
 150         related_counts = {}
 151         tags_pks = [tag.pk for tag in tags]
 152         for book in objects:
 153             for tag_pk, value in itertools.chain(book.tag_counter.iteritems(), book.theme_counter.iteritems()):
 154                 if tag_pk in tags_pks:
 155                     continue
 156                 related_counts[tag_pk] = related_counts.get(tag_pk, 0) + value
 157         related_tags = models.Tag.objects.filter(pk__in=related_counts.keys())
 158         related_tags = [tag for tag in related_tags if tag not in tags]
 159         for tag in related_tags:
 160             tag.count = related_counts[tag.pk]
 161
 162         categories = split_tags(related_tags)
 163         del related_tags
 164
 165     if not objects:
 166         only_author = len(tags) == 1 and tags[0].category == 'author'
 167         objects = models.Book.objects.none()
 168
 169     return object_list(
 170         request,
 171         objects,
 172         template_name='catalogue/tagged_object_list.html',
 173         extra_context={
 174             'categories': categories,
 175             'only_shelf': only_shelf,
 176             'only_author': only_author,
 177             'only_my_shelf': only_my_shelf,
 178             'formats_form': forms.DownloadFormatsForm(),
 179             'tags': tags,
 180         }
 181     )
 182
 183
 184 def book_fragments(request, book, theme_slug):
 185     kwargs = models.Book.split_urlid(book)
 186     if kwargs is None:
 187         raise Http404
 188     book = get_object_or_404(models.Book, **kwargs)
 189
 190     book_tag = book.book_tag()
 191     theme = get_object_or_404(models.Tag, slug=theme_slug, category='theme')
 192     fragments = models.Fragment.tagged.with_all([book_tag, theme])
 193
 194     return render_to_response('catalogue/book_fragments.html', locals(),
 195         context_instance=RequestContext(request))
 196
 197
 198 def book_detail(request, book):
 199     kwargs = models.Book.split_urlid(book)
 200     if kwargs is None:
 201         raise Http404
 202     try:
 203         book = models.Book.objects.get(**kwargs)
 204     except models.Book.DoesNotExist:
 205         return pdcounter_views.book_stub_detail(request, kwargs['slug'])
 206
 207     book_tag = book.book_tag()
 208     tags = list(book.tags.filter(~Q(category='set')))
 209     categories = split_tags(tags)
 210     book_children = book.children.all().order_by('parent_number', 'sort_key')
 211
 212     _book = book
 213     parents = []
 214     while _book.parent:
 215         parents.append(_book.parent)
 216         _book = _book.parent
 217     parents = reversed(parents)
 218
 219     theme_counter = book.theme_counter
 220     book_themes = models.Tag.objects.filter(pk__in=theme_counter.keys())
 221     for tag in book_themes:
 222         tag.count = theme_counter[tag.pk]
 223
 224     extra_info = book.get_extra_info_value()
 225     hide_about = extra_info.get('about', '').startswith('http://wiki.wolnepodreczniki.pl')
 226
 227     projects = set()
 228     for m in book.media.filter(type='mp3'):
 229         # ogg files are always from the same project
 230         meta = m.get_extra_info_value()
 231         project = meta.get('project')
 232         if not project:
 233             # temporary fallback
 234             project = u'CzytamySłuchając'
 235
 236         projects.add((project, meta.get('funded_by', '')))
 237     projects = sorted(projects)
 238
 239     custom_pdf_form = forms.CustomPDFForm()
 240     return render_to_response('catalogue/book_detail.html', locals(),
 241         context_instance=RequestContext(request))
 242
 243
 244 def book_text(request, book):
 245     kwargs = models.Book.split_fileid(book)
 246     if kwargs is None:
 247         raise Http404
 248     book = get_object_or_404(models.Book, **kwargs)
 249
 250     if not book.has_html_file():
 251         raise Http404
 252     book_themes = {}
 253     for fragment in book.fragments.all():
 254         for theme in fragment.tags.filter(category='theme'):
 255             book_themes.setdefault(theme, []).append(fragment)
 256
 257     book_themes = book_themes.items()
 258     book_themes.sort(key=lambda s: s[0].sort_key)
 259     return render_to_response('catalogue/book_text.html', locals(),
 260         context_instance=RequestContext(request))
 261
 262
 263 # ==========
 264 # = Search =
 265 # ==========
 266
 267 def _no_diacritics_regexp(query):
 268     """ returns a regexp for searching for a query without diacritics
 269
 270     should be locale-aware """
 271     names = {
 272         u'a':u'aąĄ', u'c':u'cćĆ', u'e':u'eęĘ', u'l': u'lłŁ', u'n':u'nńŃ', u'o':u'oóÓ', u's':u'sśŚ', u'z':u'zźżŹŻ',
 273         u'ą':u'ąĄ', u'ć':u'ćĆ', u'ę':u'ęĘ', u'ł': u'łŁ', u'ń':u'ńŃ', u'ó':u'óÓ', u'ś':u'śŚ', u'ź':u'źŹ', u'ż':u'żŻ'
 274         }
 275     def repl(m):
 276         l = m.group()
 277         return u"(%s)" % '|'.join(names[l])
 278     return re.sub(u'[%s]' % (u''.join(names.keys())), repl, query)
 279
 280 def unicode_re_escape(query):
 281     """ Unicode-friendly version of re.escape """
 282     return re.sub('(?u)(\W)', r'\\\1', query)
 283
 284 def _word_starts_with(name, prefix):
 285     """returns a Q object getting models having `name` contain a word
 286     starting with `prefix`
 287
 288     We define word characters as alphanumeric and underscore, like in JS.
 289
 290     Works for MySQL, PostgreSQL, Oracle.
 291     For SQLite, _sqlite* version is substituted for this.
 292     """
 293     kwargs = {}
 294
 295     prefix = _no_diacritics_regexp(unicode_re_escape(prefix))
 296     # can't use [[:<:]] (word start),
 297     # but we want both `xy` and `(xy` to catch `(xyz)`
 298     kwargs['%s__iregex' % name] = u"(^|[^[:alnum:]_])%s" % prefix
 299
 300     return Q(**kwargs)
 301
 302
 303 def _word_starts_with_regexp(prefix):
 304     prefix = _no_diacritics_regexp(unicode_re_escape(prefix))
 305     return ur"(^|(?<=[^\wąćęłńóśźżĄĆĘŁŃÓŚŹŻ]))%s" % prefix
 306
 307
 308 def _sqlite_word_starts_with(name, prefix):
 309     """ version of _word_starts_with for SQLite
 310
 311     SQLite in Django uses Python re module
 312     """
 313     kwargs = {}
 314     kwargs['%s__iregex' % name] = _word_starts_with_regexp(prefix)
 315     return Q(**kwargs)
 316
 317
 318 if hasattr(settings, 'DATABASES'):
 319     if settings.DATABASES['default']['ENGINE'] == 'django.db.backends.sqlite3':
 320         _word_starts_with = _sqlite_word_starts_with
 321 elif settings.DATABASE_ENGINE == 'sqlite3':
 322     _word_starts_with = _sqlite_word_starts_with
 323
 324
 325 class App():
 326     def __init__(self, name, view):
 327         self.name = name
 328         self._view = view
 329         self.lower = name.lower()
 330         self.category = 'application'
 331     def view(self):
 332         return reverse(*self._view)
 333
 334 _apps = (
 335     App(u'Leśmianator', (u'lesmianator', )),
 336     )
 337
 338
 339 def _tags_starting_with(prefix, user=None):
 340     prefix = prefix.lower()
 341     # PD counter
 342     book_stubs = pdcounter_models.BookStub.objects.filter(_word_starts_with('title', prefix))
 343     authors = pdcounter_models.Author.objects.filter(_word_starts_with('name', prefix))
 344
 345     books = models.Book.objects.filter(_word_starts_with('title', prefix))
 346     tags = models.Tag.objects.filter(_word_starts_with('name', prefix))
 347     if user and user.is_authenticated():
 348         tags = tags.filter(~Q(category='book') & (~Q(category='set') | Q(user=user)))
 349     else:
 350         tags = tags.filter(~Q(category='book') & ~Q(category='set'))
 351
 352     prefix_regexp = re.compile(_word_starts_with_regexp(prefix))
 353     return list(books) + list(tags) + [app for app in _apps if prefix_regexp.search(app.lower)] + list(book_stubs) + list(authors)
 354
 355
 356 def _get_result_link(match, tag_list):
 357     if isinstance(match, models.Tag):
 358         return reverse('catalogue.views.tagged_object_list',
 359             kwargs={'tags': '/'.join(tag.url_chunk for tag in tag_list + [match])}
 360         )
 361     elif isinstance(match, App):
 362         return match.view()
 363     else:
 364         return match.get_absolute_url()
 365
 366
 367 def _get_result_type(match):
 368     if isinstance(match, models.Book) or isinstance(match, pdcounter_models.BookStub):
 369         type = 'book'
 370     else:
 371         type = match.category
 372     return type
 373
 374
 375 def books_starting_with(prefix):
 376     prefix = prefix.lower()
 377     return models.Book.objects.filter(_word_starts_with('title', prefix))
 378
 379
 380 def find_best_matches(query, user=None):
 381     """ Finds a models.Book, Tag, models.BookStub or Author best matching a query.
 382
 383     Returns a with:
 384       - zero elements when nothing is found,
 385       - one element when a best result is found,
 386       - more then one element on multiple exact matches
 387
 388     Raises a ValueError on too short a query.
 389     """
 390
 391     query = query.lower()
 392     if len(query) < 2:
 393         raise ValueError("query must have at least two characters")
 394
 395     result = tuple(_tags_starting_with(query, user))
 396     # remove pdcounter stuff
 397     book_titles = set(match.pretty_title().lower() for match in result
 398                       if isinstance(match, models.Book))
 399     authors = set(match.name.lower() for match in result
 400                   if isinstance(match, models.Tag) and match.category=='author')
 401     result = tuple(res for res in result if not (
 402                  (isinstance(res, pdcounter_models.BookStub) and res.pretty_title().lower() in book_titles)
 403                  or (isinstance(res, pdcounter_models.Author) and res.name.lower() in authors)
 404              ))
 405
 406     exact_matches = tuple(res for res in result if res.name.lower() == query)
 407     if exact_matches:
 408         return exact_matches
 409     else:
 410         return tuple(result)[:1]
 411
 412
 413 def search(request):
 414     tags = request.GET.get('tags', '')
 415     prefix = request.GET.get('q', '')
 416
 417     try:
 418         tag_list = models.Tag.get_tag_list(tags)
 419     except:
 420         tag_list = []
 421
 422     try:
 423         result = find_best_matches(prefix, request.user)
 424     except ValueError:
 425         return render_to_response('catalogue/search_too_short.html', {'tags':tag_list, 'prefix':prefix},
 426             context_instance=RequestContext(request))
 427
 428     if len(result) == 1:
 429         return HttpResponseRedirect(_get_result_link(result[0], tag_list))
 430     elif len(result) > 1:
 431         return render_to_response('catalogue/search_multiple_hits.html',
 432             {'tags':tag_list, 'prefix':prefix, 'results':((x, _get_result_link(x, tag_list), _get_result_type(x)) for x in result)},
 433             context_instance=RequestContext(request))
 434     else:
 435         form = PublishingSuggestForm(initial={"books": prefix + ", "})
 436         return render_to_response('catalogue/search_no_hits.html',
 437             {'tags':tag_list, 'prefix':prefix, "pubsuggest_form": form},
 438             context_instance=RequestContext(request))
 439
 440
 441 def tags_starting_with(request):
 442     prefix = request.GET.get('q', '')
 443     # Prefix must have at least 2 characters
 444     if len(prefix) < 2:
 445         return HttpResponse('')
 446     tags_list = []
 447     result = ""
 448     for tag in _tags_starting_with(prefix, request.user):
 449         if not tag.name in tags_list:
 450             result += "\n" + tag.name
 451             tags_list.append(tag.name)
 452     return HttpResponse(result)
 453
 454 def json_tags_starting_with(request, callback=None):
 455     # Callback for JSONP
 456     prefix = request.GET.get('q', '')
 457     callback = request.GET.get('callback', '')
 458     # Prefix must have at least 2 characters
 459     if len(prefix) < 2:
 460         return HttpResponse('')
 461     tags_list = []
 462     for tag in _tags_starting_with(prefix, request.user):
 463         if not tag.name in tags_list:
 464             tags_list.append(tag.name)
 465     if request.GET.get('mozhint', ''):
 466         result = [prefix, tags_list]
 467     else:
 468         result = {"matches": tags_list}
 469     return JSONResponse(result, callback)
 470
 471 # ====================
 472 # = Shelf management =
 473 # ====================
 474 @login_required
 475 @cache.never_cache
 476 def user_shelves(request):
 477     shelves = models.Tag.objects.filter(category='set', user=request.user)
 478     new_set_form = forms.NewSetForm()
 479     return render_to_response('catalogue/user_shelves.html', locals(),
 480             context_instance=RequestContext(request))
 481
 482 @cache.never_cache
 483 def book_sets(request, book):
 484     if not request.user.is_authenticated():
 485         return HttpResponse(_('<p>To maintain your shelves you need to be logged in.</p>'))
 486
 487     kwargs = models.Book.split_urlid(book)
 488     if kwargs is None:
 489         raise Http404
 490     book = get_object_or_404(models.Book, **kwargs)
 491
 492     user_sets = models.Tag.objects.filter(category='set', user=request.user)
 493     book_sets = book.tags.filter(category='set', user=request.user)
 494
 495     if request.method == 'POST':
 496         form = forms.ObjectSetsForm(book, request.user, request.POST)
 497         if form.is_valid():
 498             old_shelves = list(book.tags.filter(category='set'))
 499             new_shelves = [models.Tag.objects.get(pk=id) for id in form.cleaned_data['set_ids']]
 500
 501             for shelf in [shelf for shelf in old_shelves if shelf not in new_shelves]:
 502                 touch_tag(shelf)
 503
 504             for shelf in [shelf for shelf in new_shelves if shelf not in old_shelves]:
 505                 touch_tag(shelf)
 506
 507             book.tags = new_shelves + list(book.tags.filter(~Q(category='set') | ~Q(user=request.user)))
 508             if request.is_ajax():
 509                 return JSONResponse('{"msg":"'+_("<p>Shelves were sucessfully saved.</p>")+'", "after":"close"}')
 510             else:
 511                 return HttpResponseRedirect('/')
 512     else:
 513         form = forms.ObjectSetsForm(book, request.user)
 514         new_set_form = forms.NewSetForm()
 515
 516     return render_to_response('catalogue/book_sets.html', locals(),
 517         context_instance=RequestContext(request))
 518
 519
 520 @login_required
 521 @require_POST
 522 @cache.never_cache
 523 def remove_from_shelf(request, shelf, book):
 524     kwargs = models.Book.split_urlid(book)
 525     if kwargs is None:
 526         raise Http404
 527     book = get_object_or_404(models.Book, **kwargs)
 528
 529     shelf = get_object_or_404(models.Tag, slug=shelf, category='set', user=request.user)
 530
 531     if shelf in book.tags:
 532         models.Tag.objects.remove_tag(book, shelf)
 533         touch_tag(shelf)
 534
 535         return HttpResponse(_('Book was successfully removed from the shelf'))
 536     else:
 537         return HttpResponse(_('This book is not on the shelf'))
 538
 539
 540 def collect_books(books):
 541     """
 542     Returns all real books in collection.
 543     """
 544     result = []
 545     for book in books:
 546         if len(book.children.all()) == 0:
 547             result.append(book)
 548         else:
 549             result += collect_books(book.children.all())
 550     return result
 551
 552
 553 @cache.never_cache
 554 def download_shelf(request, slug):
 555     """"
 556     Create a ZIP archive on disk and transmit it in chunks of 8KB,
 557     without loading the whole file into memory. A similar approach can
 558     be used for large dynamic PDF files.
 559     """
 560     from slughifi import slughifi
 561     import tempfile
 562     import zipfile
 563
 564     shelf = get_object_or_404(models.Tag, slug=slug, category='set')
 565
 566     formats = []
 567     form = forms.DownloadFormatsForm(request.GET)
 568     if form.is_valid():
 569         formats = form.cleaned_data['formats']
 570     if len(formats) == 0:
 571         formats = models.Book.ebook_formats
 572
 573     # Create a ZIP archive
 574     temp = tempfile.TemporaryFile()
 575     archive = zipfile.ZipFile(temp, 'w')
 576
 577     for book in collect_books(models.Book.tagged.with_all(shelf)):
 578         fileid = book.fileid()
 579         for ebook_format in models.Book.ebook_formats:
 580             if ebook_format in formats and book.has_media(ebook_format):
 581                 filename = book.get_media(ebook_format).path
 582                 archive.write(filename, str('%s.%s' % (fileid, ebook_format)))
 583     archive.close()
 584
 585     response = HttpResponse(content_type='application/zip', mimetype='application/x-zip-compressed')
 586     response['Content-Disposition'] = 'attachment; filename=%s.zip' % slughifi(shelf.name)
 587     response['Content-Length'] = temp.tell()
 588
 589     temp.seek(0)
 590     response.write(temp.read())
 591     return response
 592
 593
 594 @cache.never_cache
 595 def shelf_book_formats(request, shelf):
 596     """"
 597     Returns a list of formats of books in shelf.
 598     """
 599     shelf = get_object_or_404(models.Tag, slug=shelf, category='set')
 600
 601     formats = {}
 602     for ebook_format in models.Book.ebook_formats:
 603         formats[ebook_format] = False
 604
 605     for book in collect_books(models.Book.tagged.with_all(shelf)):
 606         for ebook_format in models.Book.ebook_formats:
 607             if book.has_media(ebook_format):
 608                 formats[ebook_format] = True
 609
 610     return HttpResponse(LazyEncoder().encode(formats))
 611
 612
 613 @login_required
 614 @require_POST
 615 @cache.never_cache
 616 def new_set(request):
 617     new_set_form = forms.NewSetForm(request.POST)
 618     if new_set_form.is_valid():
 619         new_set = new_set_form.save(request.user)
 620
 621         if request.is_ajax():
 622             return JSONResponse('{"id":"%d", "name":"%s", "msg":"<p>Shelf <strong>%s</strong> was successfully created</p>"}' % (new_set.id, new_set.name, new_set))
 623         else:
 624             return HttpResponseRedirect('/')
 625
 626     return HttpResponseRedirect('/')
 627
 628
 629 @login_required
 630 @require_POST
 631 @cache.never_cache
 632 def delete_shelf(request, slug):
 633     user_set = get_object_or_404(models.Tag, slug=slug, category='set', user=request.user)
 634     user_set.delete()
 635
 636     if request.is_ajax():
 637         return HttpResponse(_('<p>Shelf <strong>%s</strong> was successfully removed</p>') % user_set.name)
 638     else:
 639         return HttpResponseRedirect('/')
 640
 641
 642 # =========
 643 # = Admin =
 644 # =========
 645 @login_required
 646 @staff_required
 647 def import_book(request):
 648     """docstring for import_book"""
 649     book_import_form = forms.BookImportForm(request.POST, request.FILES)
 650     if book_import_form.is_valid():
 651         try:
 652             book_import_form.save()
 653         except:
 654             import sys
 655             import pprint
 656             import traceback
 657             info = sys.exc_info()
 658             exception = pprint.pformat(info[1])
 659             tb = '\n'.join(traceback.format_tb(info[2]))
 660             return HttpResponse(_("An error occurred: %(exception)s\n\n%(tb)s") % {'exception':exception, 'tb':tb}, mimetype='text/plain')
 661         return HttpResponse(_("Book imported successfully"))
 662     else:
 663         return HttpResponse(_("Error importing file: %r") % book_import_form.errors)
 664
 665
 666 # info views for API
 667
 668 def book_info(request, id, lang='pl'):
 669     book = get_object_or_404(models.Book, id=id)
 670     # set language by hand
 671     translation.activate(lang)
 672     return render_to_response('catalogue/book_info.html', locals(),
 673         context_instance=RequestContext(request))
 674
 675
 676 def tag_info(request, id):
 677     tag = get_object_or_404(models.Tag, id=id)
 678     return HttpResponse(tag.description)
 679
 680
 681 def download_zip(request, format, book=None):
 682     kwargs = models.Book.split_fileid(book)
 683
 684     url = None
 685     if format in models.Book.ebook_formats:
 686         url = models.Book.zip_format(format)
 687     elif format == 'audiobook' and kwargs is not None:
 688         book = get_object_or_404(models.Book, **kwargs)
 689         url = book.zip_audiobooks()
 690     else:
 691         raise Http404('No format specified for zip package')
 692     return HttpResponseRedirect(urlquote_plus(settings.MEDIA_URL + url, safe='/?='))
 693
 694
 695 def download_custom_pdf(request, book_fileid):
 696     kwargs = models.Book.split_fileid(book_fileid)
 697     if kwargs is None:
 698         raise Http404
 699     book = get_object_or_404(models.Book, **kwargs)
 700
 701     if request.method == 'GET':
 702         form = forms.CustomPDFForm(request.GET)
 703         if form.is_valid():
 704             cust = form.customizations
 705             pdf_file = models.get_customized_pdf_path(book, cust)
 706
 707             if not path.exists(pdf_file):
 708                 result = async_build_pdf.delay(book.id, cust, pdf_file)
 709                 result.wait()
 710             return AttachmentHttpResponse(file_name=("%s.pdf" % book_fileid), file_path=pdf_file, mimetype="application/pdf")
 711         else:
 712             raise Http404(_('Incorrect customization options for PDF'))
 713     else:
 714         raise Http404(_('Bad method'))