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, AjaxableFormView
  27
  28 from catalogue import models
  29 from catalogue import forms
  30 from catalogue.utils import (split_tags, AttachmentHttpResponse,
  31     async_build_pdf, MultiQuerySet)
  32 from catalogue.tasks import touch_tag
  33 from pdcounter import models as pdcounter_models
  34 from pdcounter import views as pdcounter_views
  35 from suggest.forms import PublishingSuggestForm
  36 from picture.models import Picture
  37
  38 from os import path
  39
  40 staff_required = user_passes_test(lambda user: user.is_staff)
  41
  42
  43 def catalogue(request):
  44     tags = models.Tag.objects.exclude(
  45         category__in=('set', 'book')).exclude(book_count=0)
  46     tags = list(tags)
  47     for tag in tags:
  48         tag.count = tag.book_count
  49     categories = split_tags(tags)
  50     fragment_tags = categories.get('theme', [])
  51
  52     return render_to_response('catalogue/catalogue.html', locals(),
  53         context_instance=RequestContext(request))
  54
  55
  56 def book_list(request, filter=None, template_name='catalogue/book_list.html'):
  57     """ generates a listing of all books, optionally filtered with a test function """
  58
  59     books_by_author, orphans, books_by_parent = models.Book.book_list(filter)
  60     books_nav = SortedDict()
  61     for tag in books_by_author:
  62         if books_by_author[tag]:
  63             books_nav.setdefault(tag.sort_key[0], []).append(tag)
  64
  65     return render_to_response(template_name, locals(),
  66         context_instance=RequestContext(request))
  67
  68
  69 def audiobook_list(request):
  70     return book_list(request, Q(media__type='mp3') | Q(media__type='ogg'),
  71                      template_name='catalogue/audiobook_list.html')
  72
  73
  74 def daisy_list(request):
  75     return book_list(request, Q(media__type='daisy'),
  76                      template_name='catalogue/daisy_list.html')
  77
  78
  79 def differentiate_tags(request, tags, ambiguous_slugs):
  80     beginning = '/'.join(tag.url_chunk for tag in tags)
  81     unparsed = '/'.join(ambiguous_slugs[1:])
  82     options = []
  83     for tag in models.Tag.objects.exclude(category='book').filter(slug=ambiguous_slugs[0]):
  84         options.append({
  85             'url_args': '/'.join((beginning, tag.url_chunk, unparsed)).strip('/'),
  86             'tags': [tag]
  87         })
  88     return render_to_response('catalogue/differentiate_tags.html',
  89                 {'tags': tags, 'options': options, 'unparsed': ambiguous_slugs[1:]},
  90                 context_instance=RequestContext(request))
  91
  92
  93 def tagged_object_list(request, tags=''):
  94     #    import pdb; pdb.set_trace()
  95     try:
  96         tags = models.Tag.get_tag_list(tags)
  97     except models.Tag.DoesNotExist:
  98         chunks = tags.split('/')
  99         if len(chunks) == 2 and chunks[0] == 'autor':
 100             return pdcounter_views.author_detail(request, chunks[1])
 101         else:
 102             raise Http404
 103     except models.Tag.MultipleObjectsReturned, e:
 104         return differentiate_tags(request, e.tags, e.ambiguous_slugs)
 105     except models.Tag.UrlDeprecationWarning, e:
 106         return HttpResponsePermanentRedirect(reverse('tagged_object_list', args=['/'.join(tag.url_chunk for tag in e.tags)]))
 107
 108     try:
 109         if len(tags) > settings.MAX_TAG_LIST:
 110             raise Http404
 111     except AttributeError:
 112         pass
 113
 114     if len([tag for tag in tags if tag.category == 'book']):
 115         raise Http404
 116
 117     theme_is_set = [tag for tag in tags if tag.category == 'theme']
 118     shelf_is_set = [tag for tag in tags if tag.category == 'set']
 119     only_shelf = shelf_is_set and len(tags) == 1
 120     only_my_shelf = only_shelf and request.user.is_authenticated() and request.user == tags[0].user
 121
 122     objects = only_author = None
 123     categories = {}
 124
 125     if theme_is_set:
 126         shelf_tags = [tag for tag in tags if tag.category == 'set']
 127         fragment_tags = [tag for tag in tags if tag.category != 'set']
 128         fragments = models.Fragment.tagged.with_all(fragment_tags)
 129
 130         if shelf_tags:
 131             books = models.Book.tagged.with_all(shelf_tags).order_by()
 132             l_tags = models.Tag.objects.filter(category='book', slug__in=[book.book_tag_slug() for book in books])
 133             fragments = models.Fragment.tagged.with_any(l_tags, fragments)
 134
 135         # newtagging goes crazy if we just try:
 136         #related_tags = models.Tag.objects.usage_for_queryset(fragments, counts=True,
 137         #                    extra={'where': ["catalogue_tag.category != 'book'"]})
 138         fragment_keys = [fragment.pk for fragment in fragments]
 139         if fragment_keys:
 140             related_tags = models.Fragment.tags.usage(counts=True,
 141                                 filters={'pk__in': fragment_keys},
 142                                 extra={'where': ["catalogue_tag.category != 'book'"]})
 143             related_tags = (tag for tag in related_tags if tag not in fragment_tags)
 144             categories = split_tags(related_tags)
 145
 146             objects = fragments
 147     else:
 148         if shelf_is_set:
 149             objects = models.Book.tagged.with_all(tags)
 150         else:
 151             objects = models.Book.tagged_top_level(tags)
 152
 153         # get related tags from `tag_counter` and `theme_counter`
 154         related_counts = {}
 155         tags_pks = [tag.pk for tag in tags]
 156         for book in objects:
 157             for tag_pk, value in itertools.chain(book.tag_counter.iteritems(), book.theme_counter.iteritems()):
 158                 if tag_pk in tags_pks:
 159                     continue
 160                 related_counts[tag_pk] = related_counts.get(tag_pk, 0) + value
 161         related_tags = models.Tag.objects.filter(pk__in=related_counts.keys())
 162         related_tags = [tag for tag in related_tags if tag not in tags]
 163         for tag in related_tags:
 164             tag.count = related_counts[tag.pk]
 165
 166         categories = split_tags(related_tags)
 167         del related_tags
 168
 169     if not objects:
 170         only_author = len(tags) == 1 and tags[0].category == 'author'
 171         objects = models.Book.objects.none()
 172
 173     # Add pictures
 174     objects = MultiQuerySet(Picture.tagged.with_all(tags), objects)
 175
 176     return render_to_response('catalogue/tagged_object_list.html',
 177         {
 178             'object_list': objects,
 179             'categories': categories,
 180             'only_shelf': only_shelf,
 181             'only_author': only_author,
 182             'only_my_shelf': only_my_shelf,
 183             'formats_form': forms.DownloadFormatsForm(),
 184             'tags': tags,
 185         },
 186         context_instance=RequestContext(request))
 187
 188
 189 def book_fragments(request, slug, theme_slug):
 190     book = get_object_or_404(models.Book, slug=slug)
 191
 192     book_tag = book.book_tag()
 193     theme = get_object_or_404(models.Tag, slug=theme_slug, category='theme')
 194     fragments = models.Fragment.tagged.with_all([book_tag, theme])
 195
 196     return render_to_response('catalogue/book_fragments.html', locals(),
 197         context_instance=RequestContext(request))
 198
 199
 200 def book_detail(request, slug):
 201     try:
 202         book = models.Book.objects.get(slug=slug)
 203     except models.Book.DoesNotExist:
 204         return pdcounter_views.book_stub_detail(request, kwargs['slug'])
 205
 206     book_tag = book.book_tag()
 207     tags = list(book.tags.filter(~Q(category='set')))
 208     categories = split_tags(tags)
 209     book_children = book.children.all().order_by('parent_number', 'sort_key')
 210
 211     _book = book
 212     parents = []
 213     while _book.parent:
 214         parents.append(_book.parent)
 215         _book = _book.parent
 216     parents = reversed(parents)
 217
 218     theme_counter = book.theme_counter
 219     book_themes = models.Tag.objects.filter(pk__in=theme_counter.keys())
 220     for tag in book_themes:
 221         tag.count = theme_counter[tag.pk]
 222
 223     extra_info = book.get_extra_info_value()
 224     hide_about = extra_info.get('about', '').startswith('http://wiki.wolnepodreczniki.pl')
 225
 226     custom_pdf_form = forms.CustomPDFForm()
 227     return render_to_response('catalogue/book_detail.html', locals(),
 228         context_instance=RequestContext(request))
 229
 230
 231 def player(request, slug):
 232     book = get_object_or_404(models.Book, slug=slug)
 233     if not book.has_media('mp3'):
 234         raise Http404
 235
 236     ogg_files = {}
 237     for m in book.media.filter(type='ogg').order_by():
 238         ogg_files[m.name] = m
 239
 240     audiobooks = []
 241     have_oggs = True
 242     projects = set()
 243     for mp3 in book.media.filter(type='mp3'):
 244         # ogg files are always from the same project
 245         meta = mp3.get_extra_info_value()
 246         project = meta.get('project')
 247         if not project:
 248             # temporary fallback
 249             project = u'CzytamySłuchając'
 250
 251         projects.add((project, meta.get('funded_by', '')))
 252
 253         media = {'mp3': mp3}
 254
 255         ogg = ogg_files.get(mp3.name)
 256         if ogg:
 257             media['ogg'] = ogg
 258         else:
 259             have_oggs = False
 260         audiobooks.append(media)
 261     print audiobooks
 262
 263     projects = sorted(projects)
 264
 265     return render_to_response('catalogue/player.html', locals(),
 266         context_instance=RequestContext(request))
 267
 268
 269 def book_text(request, slug):
 270     book = get_object_or_404(models.Book, slug=slug)
 271
 272     if not book.has_html_file():
 273         raise Http404
 274     book_themes = {}
 275     for fragment in book.fragments.all():
 276         for theme in fragment.tags.filter(category='theme'):
 277             book_themes.setdefault(theme, []).append(fragment)
 278
 279     book_themes = book_themes.items()
 280     book_themes.sort(key=lambda s: s[0].sort_key)
 281     return render_to_response('catalogue/book_text.html', locals(),
 282         context_instance=RequestContext(request))
 283
 284
 285 # ==========
 286 # = Search =
 287 # ==========
 288
 289 def _no_diacritics_regexp(query):
 290     """ returns a regexp for searching for a query without diacritics
 291
 292     should be locale-aware """
 293     names = {
 294         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',
 295         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'
 296         }
 297     def repl(m):
 298         l = m.group()
 299         return u"(%s)" % '|'.join(names[l])
 300     return re.sub(u'[%s]' % (u''.join(names.keys())), repl, query)
 301
 302 def unicode_re_escape(query):
 303     """ Unicode-friendly version of re.escape """
 304     return re.sub('(?u)(\W)', r'\\\1', query)
 305
 306 def _word_starts_with(name, prefix):
 307     """returns a Q object getting models having `name` contain a word
 308     starting with `prefix`
 309
 310     We define word characters as alphanumeric and underscore, like in JS.
 311
 312     Works for MySQL, PostgreSQL, Oracle.
 313     For SQLite, _sqlite* version is substituted for this.
 314     """
 315     kwargs = {}
 316
 317     prefix = _no_diacritics_regexp(unicode_re_escape(prefix))
 318     # can't use [[:<:]] (word start),
 319     # but we want both `xy` and `(xy` to catch `(xyz)`
 320     kwargs['%s__iregex' % name] = u"(^|[^[:alnum:]_])%s" % prefix
 321
 322     return Q(**kwargs)
 323
 324
 325 def _word_starts_with_regexp(prefix):
 326     prefix = _no_diacritics_regexp(unicode_re_escape(prefix))
 327     return ur"(^|(?<=[^\wąćęłńóśźżĄĆĘŁŃÓŚŹŻ]))%s" % prefix
 328
 329
 330 def _sqlite_word_starts_with(name, prefix):
 331     """ version of _word_starts_with for SQLite
 332
 333     SQLite in Django uses Python re module
 334     """
 335     kwargs = {}
 336     kwargs['%s__iregex' % name] = _word_starts_with_regexp(prefix)
 337     return Q(**kwargs)
 338
 339
 340 if hasattr(settings, 'DATABASES'):
 341     if settings.DATABASES['default']['ENGINE'] == 'django.db.backends.sqlite3':
 342         _word_starts_with = _sqlite_word_starts_with
 343 elif settings.DATABASE_ENGINE == 'sqlite3':
 344     _word_starts_with = _sqlite_word_starts_with
 345
 346
 347 class App():
 348     def __init__(self, name, view):
 349         self.name = name
 350         self._view = view
 351         self.lower = name.lower()
 352         self.category = 'application'
 353     def view(self):
 354         return reverse(*self._view)
 355
 356 _apps = (
 357     App(u'Leśmianator', (u'lesmianator', )),
 358     )
 359
 360
 361 def _tags_starting_with(prefix, user=None):
 362     prefix = prefix.lower()
 363     # PD counter
 364     book_stubs = pdcounter_models.BookStub.objects.filter(_word_starts_with('title', prefix))
 365     authors = pdcounter_models.Author.objects.filter(_word_starts_with('name', prefix))
 366
 367     books = models.Book.objects.filter(_word_starts_with('title', prefix))
 368     tags = models.Tag.objects.filter(_word_starts_with('name', prefix))
 369     if user and user.is_authenticated():
 370         tags = tags.filter(~Q(category='book') & (~Q(category='set') | Q(user=user)))
 371     else:
 372         tags = tags.filter(~Q(category='book') & ~Q(category='set'))
 373
 374     prefix_regexp = re.compile(_word_starts_with_regexp(prefix))
 375     return list(books) + list(tags) + [app for app in _apps if prefix_regexp.search(app.lower)] + list(book_stubs) + list(authors)
 376
 377
 378 def _get_result_link(match, tag_list):
 379     if isinstance(match, models.Tag):
 380         return reverse('catalogue.views.tagged_object_list',
 381             kwargs={'tags': '/'.join(tag.url_chunk for tag in tag_list + [match])}
 382         )
 383     elif isinstance(match, App):
 384         return match.view()
 385     else:
 386         return match.get_absolute_url()
 387
 388
 389 def _get_result_type(match):
 390     if isinstance(match, models.Book) or isinstance(match, pdcounter_models.BookStub):
 391         type = 'book'
 392     else:
 393         type = match.category
 394     return type
 395
 396
 397 def books_starting_with(prefix):
 398     prefix = prefix.lower()
 399     return models.Book.objects.filter(_word_starts_with('title', prefix))
 400
 401
 402 def find_best_matches(query, user=None):
 403     """ Finds a models.Book, Tag, models.BookStub or Author best matching a query.
 404
 405     Returns a with:
 406       - zero elements when nothing is found,
 407       - one element when a best result is found,
 408       - more then one element on multiple exact matches
 409
 410     Raises a ValueError on too short a query.
 411     """
 412
 413     query = query.lower()
 414     if len(query) < 2:
 415         raise ValueError("query must have at least two characters")
 416
 417     result = tuple(_tags_starting_with(query, user))
 418     # remove pdcounter stuff
 419     book_titles = set(match.pretty_title().lower() for match in result
 420                       if isinstance(match, models.Book))
 421     authors = set(match.name.lower() for match in result
 422                   if isinstance(match, models.Tag) and match.category=='author')
 423     result = tuple(res for res in result if not (
 424                  (isinstance(res, pdcounter_models.BookStub) and res.pretty_title().lower() in book_titles)
 425                  or (isinstance(res, pdcounter_models.Author) and res.name.lower() in authors)
 426              ))
 427
 428     exact_matches = tuple(res for res in result if res.name.lower() == query)
 429     if exact_matches:
 430         return exact_matches
 431     else:
 432         return tuple(result)[:1]
 433
 434
 435 def search(request):
 436     tags = request.GET.get('tags', '')
 437     prefix = request.GET.get('q', '')
 438
 439     try:
 440         tag_list = models.Tag.get_tag_list(tags)
 441     except:
 442         tag_list = []
 443
 444     try:
 445         result = find_best_matches(prefix, request.user)
 446     except ValueError:
 447         return render_to_response('catalogue/search_too_short.html', {'tags':tag_list, 'prefix':prefix},
 448             context_instance=RequestContext(request))
 449
 450     if len(result) == 1:
 451         return HttpResponseRedirect(_get_result_link(result[0], tag_list))
 452     elif len(result) > 1:
 453         return render_to_response('catalogue/search_multiple_hits.html',
 454             {'tags':tag_list, 'prefix':prefix, 'results':((x, _get_result_link(x, tag_list), _get_result_type(x)) for x in result)},
 455             context_instance=RequestContext(request))
 456     else:
 457         form = PublishingSuggestForm(initial={"books": prefix + ", "})
 458         return render_to_response('catalogue/search_no_hits.html',
 459             {'tags':tag_list, 'prefix':prefix, "pubsuggest_form": form},
 460             context_instance=RequestContext(request))
 461
 462
 463 def tags_starting_with(request):
 464     prefix = request.GET.get('q', '')
 465     # Prefix must have at least 2 characters
 466     if len(prefix) < 2:
 467         return HttpResponse('')
 468     tags_list = []
 469     result = ""
 470     for tag in _tags_starting_with(prefix, request.user):
 471         if not tag.name in tags_list:
 472             result += "\n" + tag.name
 473             tags_list.append(tag.name)
 474     return HttpResponse(result)
 475
 476 def json_tags_starting_with(request, callback=None):
 477     # Callback for JSONP
 478     prefix = request.GET.get('q', '')
 479     callback = request.GET.get('callback', '')
 480     # Prefix must have at least 2 characters
 481     if len(prefix) < 2:
 482         return HttpResponse('')
 483     tags_list = []
 484     for tag in _tags_starting_with(prefix, request.user):
 485         if not tag.name in tags_list:
 486             tags_list.append(tag.name)
 487     if request.GET.get('mozhint', ''):
 488         result = [prefix, tags_list]
 489     else:
 490         result = {"matches": tags_list}
 491     return JSONResponse(result, callback)
 492
 493 # ====================
 494 # = Shelf management =
 495 # ====================
 496 @login_required
 497 @cache.never_cache
 498 def user_shelves(request):
 499     shelves = models.Tag.objects.filter(category='set', user=request.user)
 500     new_set_form = forms.NewSetForm()
 501     return render_to_response('catalogue/user_shelves.html', locals(),
 502             context_instance=RequestContext(request))
 503
 504 @cache.never_cache
 505 def book_sets(request, slug):
 506     if not request.user.is_authenticated():
 507         return HttpResponse(_('<p>To maintain your shelves you need to be logged in.</p>'))
 508
 509     book = get_object_or_404(models.Book, slug=slug)
 510
 511     user_sets = models.Tag.objects.filter(category='set', user=request.user)
 512     book_sets = book.tags.filter(category='set', user=request.user)
 513
 514     if request.method == 'POST':
 515         form = forms.ObjectSetsForm(book, request.user, request.POST)
 516         if form.is_valid():
 517             old_shelves = list(book.tags.filter(category='set'))
 518             new_shelves = [models.Tag.objects.get(pk=id) for id in form.cleaned_data['set_ids']]
 519
 520             for shelf in [shelf for shelf in old_shelves if shelf not in new_shelves]:
 521                 touch_tag(shelf)
 522
 523             for shelf in [shelf for shelf in new_shelves if shelf not in old_shelves]:
 524                 touch_tag(shelf)
 525
 526             book.tags = new_shelves + list(book.tags.filter(~Q(category='set') | ~Q(user=request.user)))
 527             if request.is_ajax():
 528                 return JSONResponse('{"msg":"'+_("<p>Shelves were sucessfully saved.</p>")+'", "after":"close"}')
 529             else:
 530                 return HttpResponseRedirect('/')
 531     else:
 532         form = forms.ObjectSetsForm(book, request.user)
 533         new_set_form = forms.NewSetForm()
 534
 535     return render_to_response('catalogue/book_sets.html', locals(),
 536         context_instance=RequestContext(request))
 537
 538
 539 @login_required
 540 @require_POST
 541 @cache.never_cache
 542 def remove_from_shelf(request, shelf, slug):
 543     book = get_object_or_404(models.Book, slug=slug)
 544
 545     shelf = get_object_or_404(models.Tag, slug=shelf, category='set', user=request.user)
 546
 547     if shelf in book.tags:
 548         models.Tag.objects.remove_tag(book, shelf)
 549         touch_tag(shelf)
 550
 551         return HttpResponse(_('Book was successfully removed from the shelf'))
 552     else:
 553         return HttpResponse(_('This book is not on the shelf'))
 554
 555
 556 def collect_books(books):
 557     """
 558     Returns all real books in collection.
 559     """
 560     result = []
 561     for book in books:
 562         if len(book.children.all()) == 0:
 563             result.append(book)
 564         else:
 565             result += collect_books(book.children.all())
 566     return result
 567
 568
 569 @cache.never_cache
 570 def download_shelf(request, slug):
 571     """"
 572     Create a ZIP archive on disk and transmit it in chunks of 8KB,
 573     without loading the whole file into memory. A similar approach can
 574     be used for large dynamic PDF files.
 575     """
 576     from slughifi import slughifi
 577     import tempfile
 578     import zipfile
 579
 580     shelf = get_object_or_404(models.Tag, slug=slug, category='set')
 581
 582     formats = []
 583     form = forms.DownloadFormatsForm(request.GET)
 584     if form.is_valid():
 585         formats = form.cleaned_data['formats']
 586     if len(formats) == 0:
 587         formats = models.Book.ebook_formats
 588
 589     # Create a ZIP archive
 590     temp = tempfile.TemporaryFile()
 591     archive = zipfile.ZipFile(temp, 'w')
 592
 593     for book in collect_books(models.Book.tagged.with_all(shelf)):
 594         for ebook_format in models.Book.ebook_formats:
 595             if ebook_format in formats and book.has_media(ebook_format):
 596                 filename = book.get_media(ebook_format).path
 597                 archive.write(filename, str('%s.%s' % (book.slug, ebook_format)))
 598     archive.close()
 599
 600     response = HttpResponse(content_type='application/zip', mimetype='application/x-zip-compressed')
 601     response['Content-Disposition'] = 'attachment; filename=%s.zip' % slughifi(shelf.name)
 602     response['Content-Length'] = temp.tell()
 603
 604     temp.seek(0)
 605     response.write(temp.read())
 606     return response
 607
 608
 609 @cache.never_cache
 610 def shelf_book_formats(request, shelf):
 611     """"
 612     Returns a list of formats of books in shelf.
 613     """
 614     shelf = get_object_or_404(models.Tag, slug=shelf, category='set')
 615
 616     formats = {}
 617     for ebook_format in models.Book.ebook_formats:
 618         formats[ebook_format] = False
 619
 620     for book in collect_books(models.Book.tagged.with_all(shelf)):
 621         for ebook_format in models.Book.ebook_formats:
 622             if book.has_media(ebook_format):
 623                 formats[ebook_format] = True
 624
 625     return HttpResponse(LazyEncoder().encode(formats))
 626
 627
 628 @login_required
 629 @require_POST
 630 @cache.never_cache
 631 def new_set(request):
 632     new_set_form = forms.NewSetForm(request.POST)
 633     if new_set_form.is_valid():
 634         new_set = new_set_form.save(request.user)
 635
 636         if request.is_ajax():
 637             return JSONResponse('{"id":"%d", "name":"%s", "msg":"<p>Shelf <strong>%s</strong> was successfully created</p>"}' % (new_set.id, new_set.name, new_set))
 638         else:
 639             return HttpResponseRedirect('/')
 640
 641     return HttpResponseRedirect('/')
 642
 643
 644 @login_required
 645 @require_POST
 646 @cache.never_cache
 647 def delete_shelf(request, slug):
 648     user_set = get_object_or_404(models.Tag, slug=slug, category='set', user=request.user)
 649     user_set.delete()
 650
 651     if request.is_ajax():
 652         return HttpResponse(_('<p>Shelf <strong>%s</strong> was successfully removed</p>') % user_set.name)
 653     else:
 654         return HttpResponseRedirect('/')
 655
 656
 657 # =========
 658 # = Admin =
 659 # =========
 660 @login_required
 661 @staff_required
 662 def import_book(request):
 663     """docstring for import_book"""
 664     book_import_form = forms.BookImportForm(request.POST, request.FILES)
 665     if book_import_form.is_valid():
 666         try:
 667             book_import_form.save()
 668         except:
 669             import sys
 670             import pprint
 671             import traceback
 672             info = sys.exc_info()
 673             exception = pprint.pformat(info[1])
 674             tb = '\n'.join(traceback.format_tb(info[2]))
 675             return HttpResponse(_("An error occurred: %(exception)s\n\n%(tb)s") % {'exception':exception, 'tb':tb}, mimetype='text/plain')
 676         return HttpResponse(_("Book imported successfully"))
 677     else:
 678         return HttpResponse(_("Error importing file: %r") % book_import_form.errors)
 679
 680
 681 # info views for API
 682
 683 def book_info(request, id, lang='pl'):
 684     book = get_object_or_404(models.Book, id=id)
 685     # set language by hand
 686     translation.activate(lang)
 687     return render_to_response('catalogue/book_info.html', locals(),
 688         context_instance=RequestContext(request))
 689
 690
 691 def tag_info(request, id):
 692     tag = get_object_or_404(models.Tag, id=id)
 693     return HttpResponse(tag.description)
 694
 695
 696 def download_zip(request, format, slug=None):
 697     url = None
 698     if format in models.Book.ebook_formats:
 699         url = models.Book.zip_format(format)
 700     elif format in ('mp3', 'ogg') and slug is not None:
 701         book = get_object_or_404(models.Book, slug=slug)
 702         url = book.zip_audiobooks(format)
 703     else:
 704         raise Http404('No format specified for zip package')
 705     return HttpResponseRedirect(urlquote_plus(settings.MEDIA_URL + url, safe='/?='))
 706
 707
 708 def download_custom_pdf(request, slug, method='GET'):
 709     book = get_object_or_404(models.Book, slug=slug)
 710
 711     if request.method == method:
 712         form = forms.CustomPDFForm(method == 'GET' and request.GET or request.POST)
 713         if form.is_valid():
 714             cust = form.customizations
 715             pdf_file = models.get_customized_pdf_path(book, cust)
 716
 717             if not path.exists(pdf_file):
 718                 result = async_build_pdf.delay(book.id, cust, pdf_file)
 719                 result.wait()
 720             return AttachmentHttpResponse(file_name=("%s.pdf" % book.slug), file_path=pdf_file, mimetype="application/pdf")
 721         else:
 722             raise Http404(_('Incorrect customization options for PDF'))
 723     else:
 724         raise Http404(_('Bad method'))
 725
 726
 727 class CustomPDFFormView(AjaxableFormView):
 728     form_class = forms.CustomPDFForm
 729     title = _('Download custom PDF')
 730     submit = _('Download')
 731
 732     def __call__(self, request):
 733         if request.method == 'POST':
 734             return download_custom_pdf(request, request.GET['book_id'], method='POST')
 735         else:
 736             return super(CustomPDFFormView, self).__call__(request)