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     custom_pdf_form = forms.CustomPDFForm()
 232     return render_to_response('catalogue/book_detail.html', locals(),
 233         context_instance=RequestContext(request))
 234
 235
 236 def player(request, book):
 237     kwargs = models.Book.split_urlid(book)
 238     if kwargs is None:
 239         raise Http404
 240     book = get_object_or_404(models.Book, **kwargs)
 241     if not book.has_media('mp3'):
 242         raise Http404
 243
 244     ogg_files = {}
 245     for m in book.media.filter(type='ogg').order_by():
 246         ogg_files[m.name] = m
 247
 248     audiobooks = []
 249     have_oggs = True
 250     projects = set()
 251     for mp3 in book.media.filter(type='mp3'):
 252         # ogg files are always from the same project
 253         meta = mp3.get_extra_info_value()
 254         project = meta.get('project')
 255         if not project:
 256             # temporary fallback
 257             project = u'CzytamySłuchając'
 258
 259         projects.add((project, meta.get('funded_by', '')))
 260
 261         media = {'mp3': mp3}
 262
 263         ogg = ogg_files.get(mp3.name)
 264         if ogg:
 265             media['ogg'] = ogg
 266         else:
 267             have_oggs = False
 268         audiobooks.append(media)
 269     print audiobooks
 270
 271     projects = sorted(projects)
 272
 273     return render_to_response('catalogue/player.html', locals(),
 274         context_instance=RequestContext(request))
 275
 276
 277 def book_text(request, book):
 278     kwargs = models.Book.split_fileid(book)
 279     if kwargs is None:
 280         raise Http404
 281     book = get_object_or_404(models.Book, **kwargs)
 282
 283     if not book.has_html_file():
 284         raise Http404
 285     book_themes = {}
 286     for fragment in book.fragments.all():
 287         for theme in fragment.tags.filter(category='theme'):
 288             book_themes.setdefault(theme, []).append(fragment)
 289
 290     book_themes = book_themes.items()
 291     book_themes.sort(key=lambda s: s[0].sort_key)
 292     return render_to_response('catalogue/book_text.html', locals(),
 293         context_instance=RequestContext(request))
 294
 295
 296 # ==========
 297 # = Search =
 298 # ==========
 299
 300 def _no_diacritics_regexp(query):
 301     """ returns a regexp for searching for a query without diacritics
 302
 303     should be locale-aware """
 304     names = {
 305         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',
 306         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'
 307         }
 308     def repl(m):
 309         l = m.group()
 310         return u"(%s)" % '|'.join(names[l])
 311     return re.sub(u'[%s]' % (u''.join(names.keys())), repl, query)
 312
 313 def unicode_re_escape(query):
 314     """ Unicode-friendly version of re.escape """
 315     return re.sub('(?u)(\W)', r'\\\1', query)
 316
 317 def _word_starts_with(name, prefix):
 318     """returns a Q object getting models having `name` contain a word
 319     starting with `prefix`
 320
 321     We define word characters as alphanumeric and underscore, like in JS.
 322
 323     Works for MySQL, PostgreSQL, Oracle.
 324     For SQLite, _sqlite* version is substituted for this.
 325     """
 326     kwargs = {}
 327
 328     prefix = _no_diacritics_regexp(unicode_re_escape(prefix))
 329     # can't use [[:<:]] (word start),
 330     # but we want both `xy` and `(xy` to catch `(xyz)`
 331     kwargs['%s__iregex' % name] = u"(^|[^[:alnum:]_])%s" % prefix
 332
 333     return Q(**kwargs)
 334
 335
 336 def _word_starts_with_regexp(prefix):
 337     prefix = _no_diacritics_regexp(unicode_re_escape(prefix))
 338     return ur"(^|(?<=[^\wąćęłńóśźżĄĆĘŁŃÓŚŹŻ]))%s" % prefix
 339
 340
 341 def _sqlite_word_starts_with(name, prefix):
 342     """ version of _word_starts_with for SQLite
 343
 344     SQLite in Django uses Python re module
 345     """
 346     kwargs = {}
 347     kwargs['%s__iregex' % name] = _word_starts_with_regexp(prefix)
 348     return Q(**kwargs)
 349
 350
 351 if hasattr(settings, 'DATABASES'):
 352     if settings.DATABASES['default']['ENGINE'] == 'django.db.backends.sqlite3':
 353         _word_starts_with = _sqlite_word_starts_with
 354 elif settings.DATABASE_ENGINE == 'sqlite3':
 355     _word_starts_with = _sqlite_word_starts_with
 356
 357
 358 class App():
 359     def __init__(self, name, view):
 360         self.name = name
 361         self._view = view
 362         self.lower = name.lower()
 363         self.category = 'application'
 364     def view(self):
 365         return reverse(*self._view)
 366
 367 _apps = (
 368     App(u'Leśmianator', (u'lesmianator', )),
 369     )
 370
 371
 372 def _tags_starting_with(prefix, user=None):
 373     prefix = prefix.lower()
 374     # PD counter
 375     book_stubs = pdcounter_models.BookStub.objects.filter(_word_starts_with('title', prefix))
 376     authors = pdcounter_models.Author.objects.filter(_word_starts_with('name', prefix))
 377
 378     books = models.Book.objects.filter(_word_starts_with('title', prefix))
 379     tags = models.Tag.objects.filter(_word_starts_with('name', prefix))
 380     if user and user.is_authenticated():
 381         tags = tags.filter(~Q(category='book') & (~Q(category='set') | Q(user=user)))
 382     else:
 383         tags = tags.filter(~Q(category='book') & ~Q(category='set'))
 384
 385     prefix_regexp = re.compile(_word_starts_with_regexp(prefix))
 386     return list(books) + list(tags) + [app for app in _apps if prefix_regexp.search(app.lower)] + list(book_stubs) + list(authors)
 387
 388
 389 def _get_result_link(match, tag_list):
 390     if isinstance(match, models.Tag):
 391         return reverse('catalogue.views.tagged_object_list',
 392             kwargs={'tags': '/'.join(tag.url_chunk for tag in tag_list + [match])}
 393         )
 394     elif isinstance(match, App):
 395         return match.view()
 396     else:
 397         return match.get_absolute_url()
 398
 399
 400 def _get_result_type(match):
 401     if isinstance(match, models.Book) or isinstance(match, pdcounter_models.BookStub):
 402         type = 'book'
 403     else:
 404         type = match.category
 405     return type
 406
 407
 408 def books_starting_with(prefix):
 409     prefix = prefix.lower()
 410     return models.Book.objects.filter(_word_starts_with('title', prefix))
 411
 412
 413 def find_best_matches(query, user=None):
 414     """ Finds a models.Book, Tag, models.BookStub or Author best matching a query.
 415
 416     Returns a with:
 417       - zero elements when nothing is found,
 418       - one element when a best result is found,
 419       - more then one element on multiple exact matches
 420
 421     Raises a ValueError on too short a query.
 422     """
 423
 424     query = query.lower()
 425     if len(query) < 2:
 426         raise ValueError("query must have at least two characters")
 427
 428     result = tuple(_tags_starting_with(query, user))
 429     # remove pdcounter stuff
 430     book_titles = set(match.pretty_title().lower() for match in result
 431                       if isinstance(match, models.Book))
 432     authors = set(match.name.lower() for match in result
 433                   if isinstance(match, models.Tag) and match.category=='author')
 434     result = tuple(res for res in result if not (
 435                  (isinstance(res, pdcounter_models.BookStub) and res.pretty_title().lower() in book_titles)
 436                  or (isinstance(res, pdcounter_models.Author) and res.name.lower() in authors)
 437              ))
 438
 439     exact_matches = tuple(res for res in result if res.name.lower() == query)
 440     if exact_matches:
 441         return exact_matches
 442     else:
 443         return tuple(result)[:1]
 444
 445
 446 def search(request):
 447     tags = request.GET.get('tags', '')
 448     prefix = request.GET.get('q', '')
 449
 450     try:
 451         tag_list = models.Tag.get_tag_list(tags)
 452     except:
 453         tag_list = []
 454
 455     try:
 456         result = find_best_matches(prefix, request.user)
 457     except ValueError:
 458         return render_to_response('catalogue/search_too_short.html', {'tags':tag_list, 'prefix':prefix},
 459             context_instance=RequestContext(request))
 460
 461     if len(result) == 1:
 462         return HttpResponseRedirect(_get_result_link(result[0], tag_list))
 463     elif len(result) > 1:
 464         return render_to_response('catalogue/search_multiple_hits.html',
 465             {'tags':tag_list, 'prefix':prefix, 'results':((x, _get_result_link(x, tag_list), _get_result_type(x)) for x in result)},
 466             context_instance=RequestContext(request))
 467     else:
 468         form = PublishingSuggestForm(initial={"books": prefix + ", "})
 469         return render_to_response('catalogue/search_no_hits.html',
 470             {'tags':tag_list, 'prefix':prefix, "pubsuggest_form": form},
 471             context_instance=RequestContext(request))
 472
 473
 474 def tags_starting_with(request):
 475     prefix = request.GET.get('q', '')
 476     # Prefix must have at least 2 characters
 477     if len(prefix) < 2:
 478         return HttpResponse('')
 479     tags_list = []
 480     result = ""
 481     for tag in _tags_starting_with(prefix, request.user):
 482         if not tag.name in tags_list:
 483             result += "\n" + tag.name
 484             tags_list.append(tag.name)
 485     return HttpResponse(result)
 486
 487 def json_tags_starting_with(request, callback=None):
 488     # Callback for JSONP
 489     prefix = request.GET.get('q', '')
 490     callback = request.GET.get('callback', '')
 491     # Prefix must have at least 2 characters
 492     if len(prefix) < 2:
 493         return HttpResponse('')
 494     tags_list = []
 495     for tag in _tags_starting_with(prefix, request.user):
 496         if not tag.name in tags_list:
 497             tags_list.append(tag.name)
 498     if request.GET.get('mozhint', ''):
 499         result = [prefix, tags_list]
 500     else:
 501         result = {"matches": tags_list}
 502     return JSONResponse(result, callback)
 503
 504 # ====================
 505 # = Shelf management =
 506 # ====================
 507 @login_required
 508 @cache.never_cache
 509 def user_shelves(request):
 510     shelves = models.Tag.objects.filter(category='set', user=request.user)
 511     new_set_form = forms.NewSetForm()
 512     return render_to_response('catalogue/user_shelves.html', locals(),
 513             context_instance=RequestContext(request))
 514
 515 @cache.never_cache
 516 def book_sets(request, book):
 517     if not request.user.is_authenticated():
 518         return HttpResponse(_('<p>To maintain your shelves you need to be logged in.</p>'))
 519
 520     kwargs = models.Book.split_urlid(book)
 521     if kwargs is None:
 522         raise Http404
 523     book = get_object_or_404(models.Book, **kwargs)
 524
 525     user_sets = models.Tag.objects.filter(category='set', user=request.user)
 526     book_sets = book.tags.filter(category='set', user=request.user)
 527
 528     if request.method == 'POST':
 529         form = forms.ObjectSetsForm(book, request.user, request.POST)
 530         if form.is_valid():
 531             old_shelves = list(book.tags.filter(category='set'))
 532             new_shelves = [models.Tag.objects.get(pk=id) for id in form.cleaned_data['set_ids']]
 533
 534             for shelf in [shelf for shelf in old_shelves if shelf not in new_shelves]:
 535                 touch_tag(shelf)
 536
 537             for shelf in [shelf for shelf in new_shelves if shelf not in old_shelves]:
 538                 touch_tag(shelf)
 539
 540             book.tags = new_shelves + list(book.tags.filter(~Q(category='set') | ~Q(user=request.user)))
 541             if request.is_ajax():
 542                 return JSONResponse('{"msg":"'+_("<p>Shelves were sucessfully saved.</p>")+'", "after":"close"}')
 543             else:
 544                 return HttpResponseRedirect('/')
 545     else:
 546         form = forms.ObjectSetsForm(book, request.user)
 547         new_set_form = forms.NewSetForm()
 548
 549     return render_to_response('catalogue/book_sets.html', locals(),
 550         context_instance=RequestContext(request))
 551
 552
 553 @login_required
 554 @require_POST
 555 @cache.never_cache
 556 def remove_from_shelf(request, shelf, book):
 557     kwargs = models.Book.split_urlid(book)
 558     if kwargs is None:
 559         raise Http404
 560     book = get_object_or_404(models.Book, **kwargs)
 561
 562     shelf = get_object_or_404(models.Tag, slug=shelf, category='set', user=request.user)
 563
 564     if shelf in book.tags:
 565         models.Tag.objects.remove_tag(book, shelf)
 566         touch_tag(shelf)
 567
 568         return HttpResponse(_('Book was successfully removed from the shelf'))
 569     else:
 570         return HttpResponse(_('This book is not on the shelf'))
 571
 572
 573 def collect_books(books):
 574     """
 575     Returns all real books in collection.
 576     """
 577     result = []
 578     for book in books:
 579         if len(book.children.all()) == 0:
 580             result.append(book)
 581         else:
 582             result += collect_books(book.children.all())
 583     return result
 584
 585
 586 @cache.never_cache
 587 def download_shelf(request, slug):
 588     """"
 589     Create a ZIP archive on disk and transmit it in chunks of 8KB,
 590     without loading the whole file into memory. A similar approach can
 591     be used for large dynamic PDF files.
 592     """
 593     from slughifi import slughifi
 594     import tempfile
 595     import zipfile
 596
 597     shelf = get_object_or_404(models.Tag, slug=slug, category='set')
 598
 599     formats = []
 600     form = forms.DownloadFormatsForm(request.GET)
 601     if form.is_valid():
 602         formats = form.cleaned_data['formats']
 603     if len(formats) == 0:
 604         formats = models.Book.ebook_formats
 605
 606     # Create a ZIP archive
 607     temp = tempfile.TemporaryFile()
 608     archive = zipfile.ZipFile(temp, 'w')
 609
 610     for book in collect_books(models.Book.tagged.with_all(shelf)):
 611         fileid = book.fileid()
 612         for ebook_format in models.Book.ebook_formats:
 613             if ebook_format in formats and book.has_media(ebook_format):
 614                 filename = book.get_media(ebook_format).path
 615                 archive.write(filename, str('%s.%s' % (fileid, ebook_format)))
 616     archive.close()
 617
 618     response = HttpResponse(content_type='application/zip', mimetype='application/x-zip-compressed')
 619     response['Content-Disposition'] = 'attachment; filename=%s.zip' % slughifi(shelf.name)
 620     response['Content-Length'] = temp.tell()
 621
 622     temp.seek(0)
 623     response.write(temp.read())
 624     return response
 625
 626
 627 @cache.never_cache
 628 def shelf_book_formats(request, shelf):
 629     """"
 630     Returns a list of formats of books in shelf.
 631     """
 632     shelf = get_object_or_404(models.Tag, slug=shelf, category='set')
 633
 634     formats = {}
 635     for ebook_format in models.Book.ebook_formats:
 636         formats[ebook_format] = False
 637
 638     for book in collect_books(models.Book.tagged.with_all(shelf)):
 639         for ebook_format in models.Book.ebook_formats:
 640             if book.has_media(ebook_format):
 641                 formats[ebook_format] = True
 642
 643     return HttpResponse(LazyEncoder().encode(formats))
 644
 645
 646 @login_required
 647 @require_POST
 648 @cache.never_cache
 649 def new_set(request):
 650     new_set_form = forms.NewSetForm(request.POST)
 651     if new_set_form.is_valid():
 652         new_set = new_set_form.save(request.user)
 653
 654         if request.is_ajax():
 655             return JSONResponse('{"id":"%d", "name":"%s", "msg":"<p>Shelf <strong>%s</strong> was successfully created</p>"}' % (new_set.id, new_set.name, new_set))
 656         else:
 657             return HttpResponseRedirect('/')
 658
 659     return HttpResponseRedirect('/')
 660
 661
 662 @login_required
 663 @require_POST
 664 @cache.never_cache
 665 def delete_shelf(request, slug):
 666     user_set = get_object_or_404(models.Tag, slug=slug, category='set', user=request.user)
 667     user_set.delete()
 668
 669     if request.is_ajax():
 670         return HttpResponse(_('<p>Shelf <strong>%s</strong> was successfully removed</p>') % user_set.name)
 671     else:
 672         return HttpResponseRedirect('/')
 673
 674
 675 # =========
 676 # = Admin =
 677 # =========
 678 @login_required
 679 @staff_required
 680 def import_book(request):
 681     """docstring for import_book"""
 682     book_import_form = forms.BookImportForm(request.POST, request.FILES)
 683     if book_import_form.is_valid():
 684         try:
 685             book_import_form.save()
 686         except:
 687             import sys
 688             import pprint
 689             import traceback
 690             info = sys.exc_info()
 691             exception = pprint.pformat(info[1])
 692             tb = '\n'.join(traceback.format_tb(info[2]))
 693             return HttpResponse(_("An error occurred: %(exception)s\n\n%(tb)s") % {'exception':exception, 'tb':tb}, mimetype='text/plain')
 694         return HttpResponse(_("Book imported successfully"))
 695     else:
 696         return HttpResponse(_("Error importing file: %r") % book_import_form.errors)
 697
 698
 699 # info views for API
 700
 701 def book_info(request, id, lang='pl'):
 702     book = get_object_or_404(models.Book, id=id)
 703     # set language by hand
 704     translation.activate(lang)
 705     return render_to_response('catalogue/book_info.html', locals(),
 706         context_instance=RequestContext(request))
 707
 708
 709 def tag_info(request, id):
 710     tag = get_object_or_404(models.Tag, id=id)
 711     return HttpResponse(tag.description)
 712
 713
 714 def download_zip(request, format, book=None):
 715     kwargs = models.Book.split_fileid(book)
 716
 717     url = None
 718     if format in models.Book.ebook_formats:
 719         url = models.Book.zip_format(format)
 720     elif format in ('mp3', 'ogg') and kwargs is not None:
 721         book = get_object_or_404(models.Book, **kwargs)
 722         url = book.zip_audiobooks(format)
 723     else:
 724         raise Http404('No format specified for zip package')
 725     return HttpResponseRedirect(urlquote_plus(settings.MEDIA_URL + url, safe='/?='))
 726
 727
 728 def download_custom_pdf(request, book_fileid):
 729     kwargs = models.Book.split_fileid(book_fileid)
 730     if kwargs is None:
 731         raise Http404
 732     book = get_object_or_404(models.Book, **kwargs)
 733
 734     if request.method == 'GET':
 735         form = forms.CustomPDFForm(request.GET)
 736         if form.is_valid():
 737             cust = form.customizations
 738             pdf_file = models.get_customized_pdf_path(book, cust)
 739
 740             if not path.exists(pdf_file):
 741                 result = async_build_pdf.delay(book.id, cust, pdf_file)
 742                 result.wait()
 743             return AttachmentHttpResponse(file_name=("%s.pdf" % book_fileid), file_path=pdf_file, mimetype="application/pdf")
 744         else:
 745             raise Http404(_('Incorrect customization options for PDF'))
 746     else:
 747         raise Http404(_('Bad method'))