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