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, book, theme_slug):
 190     kwargs = models.Book.split_urlid(book)
 191     if kwargs is None:
 192         raise Http404
 193     book = get_object_or_404(models.Book, **kwargs)
 194
 195     book_tag = book.book_tag()
 196     theme = get_object_or_404(models.Tag, slug=theme_slug, category='theme')
 197     fragments = models.Fragment.tagged.with_all([book_tag, theme])
 198
 199     return render_to_response('catalogue/book_fragments.html', locals(),
 200         context_instance=RequestContext(request))
 201
 202
 203 def book_detail(request, book):
 204     kwargs = models.Book.split_urlid(book)
 205     if kwargs is None:
 206         raise Http404
 207     try:
 208         book = models.Book.objects.get(**kwargs)
 209     except models.Book.DoesNotExist:
 210         return pdcounter_views.book_stub_detail(request, kwargs['slug'])
 211
 212     book_tag = book.book_tag()
 213     tags = list(book.tags.filter(~Q(category='set')))
 214     categories = split_tags(tags)
 215     book_children = book.children.all().order_by('parent_number', 'sort_key')
 216
 217     _book = book
 218     parents = []
 219     while _book.parent:
 220         parents.append(_book.parent)
 221         _book = _book.parent
 222     parents = reversed(parents)
 223
 224     theme_counter = book.theme_counter
 225     book_themes = models.Tag.objects.filter(pk__in=theme_counter.keys())
 226     for tag in book_themes:
 227         tag.count = theme_counter[tag.pk]
 228
 229     extra_info = book.get_extra_info_value()
 230     hide_about = extra_info.get('about', '').startswith('http://wiki.wolnepodreczniki.pl')
 231
 232     custom_pdf_form = forms.CustomPDFForm()
 233     return render_to_response('catalogue/book_detail.html', locals(),
 234         context_instance=RequestContext(request))
 235
 236
 237 def player(request, book):
 238     kwargs = models.Book.split_urlid(book)
 239     if kwargs is None:
 240         raise Http404
 241     book = get_object_or_404(models.Book, **kwargs)
 242     if not book.has_media('mp3'):
 243         raise Http404
 244
 245     ogg_files = {}
 246     for m in book.media.filter(type='ogg').order_by():
 247         ogg_files[m.name] = m
 248
 249     audiobooks = []
 250     have_oggs = True
 251     projects = set()
 252     for mp3 in book.media.filter(type='mp3'):
 253         # ogg files are always from the same project
 254         meta = mp3.get_extra_info_value()
 255         project = meta.get('project')
 256         if not project:
 257             # temporary fallback
 258             project = u'CzytamySłuchając'
 259
 260         projects.add((project, meta.get('funded_by', '')))
 261
 262         media = {'mp3': mp3}
 263
 264         ogg = ogg_files.get(mp3.name)
 265         if ogg:
 266             media['ogg'] = ogg
 267         else:
 268             have_oggs = False
 269         audiobooks.append(media)
 270     print audiobooks
 271
 272     projects = sorted(projects)
 273
 274     return render_to_response('catalogue/player.html', locals(),
 275         context_instance=RequestContext(request))
 276
 277
 278 def book_text(request, book):
 279     kwargs = models.Book.split_fileid(book)
 280     if kwargs is None:
 281         raise Http404
 282     book = get_object_or_404(models.Book, **kwargs)
 283
 284     if not book.has_html_file():
 285         raise Http404
 286     book_themes = {}
 287     for fragment in book.fragments.all():
 288         for theme in fragment.tags.filter(category='theme'):
 289             book_themes.setdefault(theme, []).append(fragment)
 290
 291     book_themes = book_themes.items()
 292     book_themes.sort(key=lambda s: s[0].sort_key)
 293     return render_to_response('catalogue/book_text.html', locals(),
 294         context_instance=RequestContext(request))
 295
 296
 297 # ==========
 298 # = Search =
 299 # ==========
 300
 301 def _no_diacritics_regexp(query):
 302     """ returns a regexp for searching for a query without diacritics
 303
 304     should be locale-aware """
 305     names = {
 306         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',
 307         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'
 308         }
 309     def repl(m):
 310         l = m.group()
 311         return u"(%s)" % '|'.join(names[l])
 312     return re.sub(u'[%s]' % (u''.join(names.keys())), repl, query)
 313
 314 def unicode_re_escape(query):
 315     """ Unicode-friendly version of re.escape """
 316     return re.sub('(?u)(\W)', r'\\\1', query)
 317
 318 def _word_starts_with(name, prefix):
 319     """returns a Q object getting models having `name` contain a word
 320     starting with `prefix`
 321
 322     We define word characters as alphanumeric and underscore, like in JS.
 323
 324     Works for MySQL, PostgreSQL, Oracle.
 325     For SQLite, _sqlite* version is substituted for this.
 326     """
 327     kwargs = {}
 328
 329     prefix = _no_diacritics_regexp(unicode_re_escape(prefix))
 330     # can't use [[:<:]] (word start),
 331     # but we want both `xy` and `(xy` to catch `(xyz)`
 332     kwargs['%s__iregex' % name] = u"(^|[^[:alnum:]_])%s" % prefix
 333
 334     return Q(**kwargs)
 335
 336
 337 def _word_starts_with_regexp(prefix):
 338     prefix = _no_diacritics_regexp(unicode_re_escape(prefix))
 339     return ur"(^|(?<=[^\wąćęłńóśźżĄĆĘŁŃÓŚŹŻ]))%s" % prefix
 340
 341
 342 def _sqlite_word_starts_with(name, prefix):
 343     """ version of _word_starts_with for SQLite
 344
 345     SQLite in Django uses Python re module
 346     """
 347     kwargs = {}
 348     kwargs['%s__iregex' % name] = _word_starts_with_regexp(prefix)
 349     return Q(**kwargs)
 350
 351
 352 if hasattr(settings, 'DATABASES'):
 353     if settings.DATABASES['default']['ENGINE'] == 'django.db.backends.sqlite3':
 354         _word_starts_with = _sqlite_word_starts_with
 355 elif settings.DATABASE_ENGINE == 'sqlite3':
 356     _word_starts_with = _sqlite_word_starts_with
 357
 358
 359 class App():
 360     def __init__(self, name, view):
 361         self.name = name
 362         self._view = view
 363         self.lower = name.lower()
 364         self.category = 'application'
 365     def view(self):
 366         return reverse(*self._view)
 367
 368 _apps = (
 369     App(u'Leśmianator', (u'lesmianator', )),
 370     )
 371
 372
 373 def _tags_starting_with(prefix, user=None):
 374     prefix = prefix.lower()
 375     # PD counter
 376     book_stubs = pdcounter_models.BookStub.objects.filter(_word_starts_with('title', prefix))
 377     authors = pdcounter_models.Author.objects.filter(_word_starts_with('name', prefix))
 378
 379     books = models.Book.objects.filter(_word_starts_with('title', prefix))
 380     tags = models.Tag.objects.filter(_word_starts_with('name', prefix))
 381     if user and user.is_authenticated():
 382         tags = tags.filter(~Q(category='book') & (~Q(category='set') | Q(user=user)))
 383     else:
 384         tags = tags.filter(~Q(category='book') & ~Q(category='set'))
 385
 386     prefix_regexp = re.compile(_word_starts_with_regexp(prefix))
 387     return list(books) + list(tags) + [app for app in _apps if prefix_regexp.search(app.lower)] + list(book_stubs) + list(authors)
 388
 389
 390 def _get_result_link(match, tag_list):
 391     if isinstance(match, models.Tag):
 392         return reverse('catalogue.views.tagged_object_list',
 393             kwargs={'tags': '/'.join(tag.url_chunk for tag in tag_list + [match])}
 394         )
 395     elif isinstance(match, App):
 396         return match.view()
 397     else:
 398         return match.get_absolute_url()
 399
 400
 401 def _get_result_type(match):
 402     if isinstance(match, models.Book) or isinstance(match, pdcounter_models.BookStub):
 403         type = 'book'
 404     else:
 405         type = match.category
 406     return type
 407
 408
 409 def books_starting_with(prefix):
 410     prefix = prefix.lower()
 411     return models.Book.objects.filter(_word_starts_with('title', prefix))
 412
 413
 414 def find_best_matches(query, user=None):
 415     """ Finds a models.Book, Tag, models.BookStub or Author best matching a query.
 416
 417     Returns a with:
 418       - zero elements when nothing is found,
 419       - one element when a best result is found,
 420       - more then one element on multiple exact matches
 421
 422     Raises a ValueError on too short a query.
 423     """
 424
 425     query = query.lower()
 426     if len(query) < 2:
 427         raise ValueError("query must have at least two characters")
 428
 429     result = tuple(_tags_starting_with(query, user))
 430     # remove pdcounter stuff
 431     book_titles = set(match.pretty_title().lower() for match in result
 432                       if isinstance(match, models.Book))
 433     authors = set(match.name.lower() for match in result
 434                   if isinstance(match, models.Tag) and match.category=='author')
 435     result = tuple(res for res in result if not (
 436                  (isinstance(res, pdcounter_models.BookStub) and res.pretty_title().lower() in book_titles)
 437                  or (isinstance(res, pdcounter_models.Author) and res.name.lower() in authors)
 438              ))
 439
 440     exact_matches = tuple(res for res in result if res.name.lower() == query)
 441     if exact_matches:
 442         return exact_matches
 443     else:
 444         return tuple(result)[:1]
 445
 446
 447 def search(request):
 448     tags = request.GET.get('tags', '')
 449     prefix = request.GET.get('q', '')
 450
 451     try:
 452         tag_list = models.Tag.get_tag_list(tags)
 453     except:
 454         tag_list = []
 455
 456     try:
 457         result = find_best_matches(prefix, request.user)
 458     except ValueError:
 459         return render_to_response('catalogue/search_too_short.html', {'tags':tag_list, 'prefix':prefix},
 460             context_instance=RequestContext(request))
 461
 462     if len(result) == 1:
 463         return HttpResponseRedirect(_get_result_link(result[0], tag_list))
 464     elif len(result) > 1:
 465         return render_to_response('catalogue/search_multiple_hits.html',
 466             {'tags':tag_list, 'prefix':prefix, 'results':((x, _get_result_link(x, tag_list), _get_result_type(x)) for x in result)},
 467             context_instance=RequestContext(request))
 468     else:
 469         form = PublishingSuggestForm(initial={"books": prefix + ", "})
 470         return render_to_response('catalogue/search_no_hits.html',
 471             {'tags':tag_list, 'prefix':prefix, "pubsuggest_form": form},
 472             context_instance=RequestContext(request))
 473
 474
 475 def tags_starting_with(request):
 476     prefix = request.GET.get('q', '')
 477     # Prefix must have at least 2 characters
 478     if len(prefix) < 2:
 479         return HttpResponse('')
 480     tags_list = []
 481     result = ""
 482     for tag in _tags_starting_with(prefix, request.user):
 483         if not tag.name in tags_list:
 484             result += "\n" + tag.name
 485             tags_list.append(tag.name)
 486     return HttpResponse(result)
 487
 488 def json_tags_starting_with(request, callback=None):
 489     # Callback for JSONP
 490     prefix = request.GET.get('q', '')
 491     callback = request.GET.get('callback', '')
 492     # Prefix must have at least 2 characters
 493     if len(prefix) < 2:
 494         return HttpResponse('')
 495     tags_list = []
 496     for tag in _tags_starting_with(prefix, request.user):
 497         if not tag.name in tags_list:
 498             tags_list.append(tag.name)
 499     if request.GET.get('mozhint', ''):
 500         result = [prefix, tags_list]
 501     else:
 502         result = {"matches": tags_list}
 503     return JSONResponse(result, callback)
 504
 505 # ====================
 506 # = Shelf management =
 507 # ====================
 508 @login_required
 509 @cache.never_cache
 510 def user_shelves(request):
 511     shelves = models.Tag.objects.filter(category='set', user=request.user)
 512     new_set_form = forms.NewSetForm()
 513     return render_to_response('catalogue/user_shelves.html', locals(),
 514             context_instance=RequestContext(request))
 515
 516 @cache.never_cache
 517 def book_sets(request, book):
 518     if not request.user.is_authenticated():
 519         return HttpResponse(_('<p>To maintain your shelves you need to be logged in.</p>'))
 520
 521     kwargs = models.Book.split_urlid(book)
 522     if kwargs is None:
 523         raise Http404
 524     book = get_object_or_404(models.Book, **kwargs)
 525
 526     user_sets = models.Tag.objects.filter(category='set', user=request.user)
 527     book_sets = book.tags.filter(category='set', user=request.user)
 528
 529     if request.method == 'POST':
 530         form = forms.ObjectSetsForm(book, request.user, request.POST)
 531         if form.is_valid():
 532             old_shelves = list(book.tags.filter(category='set'))
 533             new_shelves = [models.Tag.objects.get(pk=id) for id in form.cleaned_data['set_ids']]
 534
 535             for shelf in [shelf for shelf in old_shelves if shelf not in new_shelves]:
 536                 touch_tag(shelf)
 537
 538             for shelf in [shelf for shelf in new_shelves if shelf not in old_shelves]:
 539                 touch_tag(shelf)
 540
 541             book.tags = new_shelves + list(book.tags.filter(~Q(category='set') | ~Q(user=request.user)))
 542             if request.is_ajax():
 543                 return JSONResponse('{"msg":"'+_("<p>Shelves were sucessfully saved.</p>")+'", "after":"close"}')
 544             else:
 545                 return HttpResponseRedirect('/')
 546     else:
 547         form = forms.ObjectSetsForm(book, request.user)
 548         new_set_form = forms.NewSetForm()
 549
 550     return render_to_response('catalogue/book_sets.html', locals(),
 551         context_instance=RequestContext(request))
 552
 553
 554 @login_required
 555 @require_POST
 556 @cache.never_cache
 557 def remove_from_shelf(request, shelf, book):
 558     kwargs = models.Book.split_urlid(book)
 559     if kwargs is None:
 560         raise Http404
 561     book = get_object_or_404(models.Book, **kwargs)
 562
 563     shelf = get_object_or_404(models.Tag, slug=shelf, category='set', user=request.user)
 564
 565     if shelf in book.tags:
 566         models.Tag.objects.remove_tag(book, shelf)
 567         touch_tag(shelf)
 568
 569         return HttpResponse(_('Book was successfully removed from the shelf'))
 570     else:
 571         return HttpResponse(_('This book is not on the shelf'))
 572
 573
 574 def collect_books(books):
 575     """
 576     Returns all real books in collection.
 577     """
 578     result = []
 579     for book in books:
 580         if len(book.children.all()) == 0:
 581             result.append(book)
 582         else:
 583             result += collect_books(book.children.all())
 584     return result
 585
 586
 587 @cache.never_cache
 588 def download_shelf(request, slug):
 589     """"
 590     Create a ZIP archive on disk and transmit it in chunks of 8KB,
 591     without loading the whole file into memory. A similar approach can
 592     be used for large dynamic PDF files.
 593     """
 594     from slughifi import slughifi
 595     import tempfile
 596     import zipfile
 597
 598     shelf = get_object_or_404(models.Tag, slug=slug, category='set')
 599
 600     formats = []
 601     form = forms.DownloadFormatsForm(request.GET)
 602     if form.is_valid():
 603         formats = form.cleaned_data['formats']
 604     if len(formats) == 0:
 605         formats = models.Book.ebook_formats
 606
 607     # Create a ZIP archive
 608     temp = tempfile.TemporaryFile()
 609     archive = zipfile.ZipFile(temp, 'w')
 610
 611     for book in collect_books(models.Book.tagged.with_all(shelf)):
 612         fileid = book.fileid()
 613         for ebook_format in models.Book.ebook_formats:
 614             if ebook_format in formats and book.has_media(ebook_format):
 615                 filename = book.get_media(ebook_format).path
 616                 archive.write(filename, str('%s.%s' % (fileid, ebook_format)))
 617     archive.close()
 618
 619     response = HttpResponse(content_type='application/zip', mimetype='application/x-zip-compressed')
 620     response['Content-Disposition'] = 'attachment; filename=%s.zip' % slughifi(shelf.name)
 621     response['Content-Length'] = temp.tell()
 622
 623     temp.seek(0)
 624     response.write(temp.read())
 625     return response
 626
 627
 628 @cache.never_cache
 629 def shelf_book_formats(request, shelf):
 630     """"
 631     Returns a list of formats of books in shelf.
 632     """
 633     shelf = get_object_or_404(models.Tag, slug=shelf, category='set')
 634
 635     formats = {}
 636     for ebook_format in models.Book.ebook_formats:
 637         formats[ebook_format] = False
 638
 639     for book in collect_books(models.Book.tagged.with_all(shelf)):
 640         for ebook_format in models.Book.ebook_formats:
 641             if book.has_media(ebook_format):
 642                 formats[ebook_format] = True
 643
 644     return HttpResponse(LazyEncoder().encode(formats))
 645
 646
 647 @login_required
 648 @require_POST
 649 @cache.never_cache
 650 def new_set(request):
 651     new_set_form = forms.NewSetForm(request.POST)
 652     if new_set_form.is_valid():
 653         new_set = new_set_form.save(request.user)
 654
 655         if request.is_ajax():
 656             return JSONResponse('{"id":"%d", "name":"%s", "msg":"<p>Shelf <strong>%s</strong> was successfully created</p>"}' % (new_set.id, new_set.name, new_set))
 657         else:
 658             return HttpResponseRedirect('/')
 659
 660     return HttpResponseRedirect('/')
 661
 662
 663 @login_required
 664 @require_POST
 665 @cache.never_cache
 666 def delete_shelf(request, slug):
 667     user_set = get_object_or_404(models.Tag, slug=slug, category='set', user=request.user)
 668     user_set.delete()
 669
 670     if request.is_ajax():
 671         return HttpResponse(_('<p>Shelf <strong>%s</strong> was successfully removed</p>') % user_set.name)
 672     else:
 673         return HttpResponseRedirect('/')
 674
 675
 676 # =========
 677 # = Admin =
 678 # =========
 679 @login_required
 680 @staff_required
 681 def import_book(request):
 682     """docstring for import_book"""
 683     book_import_form = forms.BookImportForm(request.POST, request.FILES)
 684     if book_import_form.is_valid():
 685         try:
 686             book_import_form.save()
 687         except:
 688             import sys
 689             import pprint
 690             import traceback
 691             info = sys.exc_info()
 692             exception = pprint.pformat(info[1])
 693             tb = '\n'.join(traceback.format_tb(info[2]))
 694             return HttpResponse(_("An error occurred: %(exception)s\n\n%(tb)s") % {'exception':exception, 'tb':tb}, mimetype='text/plain')
 695         return HttpResponse(_("Book imported successfully"))
 696     else:
 697         return HttpResponse(_("Error importing file: %r") % book_import_form.errors)
 698
 699
 700 # info views for API
 701
 702 def book_info(request, id, lang='pl'):
 703     book = get_object_or_404(models.Book, id=id)
 704     # set language by hand
 705     translation.activate(lang)
 706     return render_to_response('catalogue/book_info.html', locals(),
 707         context_instance=RequestContext(request))
 708
 709
 710 def tag_info(request, id):
 711     tag = get_object_or_404(models.Tag, id=id)
 712     return HttpResponse(tag.description)
 713
 714
 715 def download_zip(request, format, book=None):
 716     kwargs = models.Book.split_fileid(book)
 717
 718     url = None
 719     if format in models.Book.ebook_formats:
 720         url = models.Book.zip_format(format)
 721     elif format in ('mp3', 'ogg') and kwargs is not None:
 722         book = get_object_or_404(models.Book, **kwargs)
 723         url = book.zip_audiobooks(format)
 724     else:
 725         raise Http404('No format specified for zip package')
 726     return HttpResponseRedirect(urlquote_plus(settings.MEDIA_URL + url, safe='/?='))
 727
 728
 729 def download_custom_pdf(request, book_fileid, method='GET'):
 730     kwargs = models.Book.split_fileid(book_fileid)
 731     if kwargs is None:
 732         raise Http404
 733     book = get_object_or_404(models.Book, **kwargs)
 734
 735     if request.method == method:
 736         form = forms.CustomPDFForm(method == 'GET' and request.GET or request.POST)
 737         if form.is_valid():
 738             cust = form.customizations
 739             pdf_file = models.get_customized_pdf_path(book, cust)
 740
 741             if not path.exists(pdf_file):
 742                 result = async_build_pdf.delay(book.id, cust, pdf_file)
 743                 result.wait()
 744             return AttachmentHttpResponse(file_name=("%s.pdf" % book_fileid), file_path=pdf_file, mimetype="application/pdf")
 745         else:
 746             raise Http404(_('Incorrect customization options for PDF'))
 747     else:
 748         raise Http404(_('Bad method'))
 749
 750
 751 class CustomPDFFormView(AjaxableFormView):
 752     form_class = forms.CustomPDFForm
 753     title = _('Download custom PDF')
 754     submit = _('Download')
 755
 756     def __call__(self, request):
 757         if request.method == 'POST':
 758             return download_custom_pdf(request, request.GET['book_id'], method='POST')
 759         else:
 760             return super(CustomPDFFormView, self).__call__(request)