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 import simplejson
  21 from django.utils.functional import Promise
  22 from django.utils.encoding import force_unicode
  23 from django.utils.http import urlquote_plus
  24 from django.views.decorators import cache
  25 from django.utils import translation
  26 from django.utils.translation import ugettext as _
  27 from django.views.generic.list_detail import object_list
  28
  29 from catalogue import models
  30 from catalogue import forms
  31 from catalogue.utils import split_tags, AttachmentHttpResponse, async_build_pdf
  32 from pdcounter import models as pdcounter_models
  33 from pdcounter import views as pdcounter_views
  34 from suggest.forms import PublishingSuggestForm
  35
  36 from os import path
  37
  38 staff_required = user_passes_test(lambda user: user.is_staff)
  39
  40
  41 class LazyEncoder(simplejson.JSONEncoder):
  42     def default(self, obj):
  43         if isinstance(obj, Promise):
  44             return force_unicode(obj)
  45         return obj
  46
  47 # shortcut for JSON reponses
  48 class JSONResponse(HttpResponse):
  49     def __init__(self, data={}, callback=None, **kwargs):
  50         # get rid of mimetype
  51         kwargs.pop('mimetype', None)
  52         data = simplejson.dumps(data)
  53         if callback:
  54             data = callback + "(" + data + ");"
  55         super(JSONResponse, self).__init__(data, mimetype="application/json", **kwargs)
  56
  57
  58 def main_page(request):
  59     if request.user.is_authenticated():
  60         shelves = models.Tag.objects.filter(category='set', user=request.user)
  61         new_set_form = forms.NewSetForm()
  62
  63     tags = models.Tag.objects.exclude(category__in=('set', 'book'))
  64     for tag in tags:
  65         tag.count = tag.get_count()
  66     categories = split_tags(tags)
  67     fragment_tags = categories.get('theme', [])
  68
  69     form = forms.SearchForm()
  70     return render_to_response('catalogue/main_page.html', locals(),
  71         context_instance=RequestContext(request))
  72
  73
  74 def book_list(request, filter=None, template_name='catalogue/book_list.html'):
  75     """ generates a listing of all books, optionally filtered with a test function """
  76
  77     form = forms.SearchForm()
  78
  79     books_by_author, orphans, books_by_parent = models.Book.book_list(filter)
  80     books_nav = SortedDict()
  81     for tag in books_by_author:
  82         if books_by_author[tag]:
  83             books_nav.setdefault(tag.sort_key[0], []).append(tag)
  84
  85     return render_to_response(template_name, locals(),
  86         context_instance=RequestContext(request))
  87
  88
  89 def audiobook_list(request):
  90     return book_list(request, Q(media__type='mp3') | Q(media__type='ogg'),
  91                      template_name='catalogue/audiobook_list.html')
  92
  93
  94 def daisy_list(request):
  95     return book_list(request, Q(media__type='daisy'),
  96                      template_name='catalogue/daisy_list.html')
  97
  98
  99 def differentiate_tags(request, tags, ambiguous_slugs):
 100     beginning = '/'.join(tag.url_chunk for tag in tags)
 101     unparsed = '/'.join(ambiguous_slugs[1:])
 102     options = []
 103     for tag in models.Tag.objects.exclude(category='book').filter(slug=ambiguous_slugs[0]):
 104         options.append({
 105             'url_args': '/'.join((beginning, tag.url_chunk, unparsed)).strip('/'),
 106             'tags': [tag]
 107         })
 108     return render_to_response('catalogue/differentiate_tags.html',
 109                 {'tags': tags, 'options': options, 'unparsed': ambiguous_slugs[1:]},
 110                 context_instance=RequestContext(request))
 111
 112
 113 def tagged_object_list(request, tags=''):
 114     try:
 115         tags = models.Tag.get_tag_list(tags)
 116     except models.Tag.DoesNotExist:
 117         chunks = tags.split('/')
 118         if len(chunks) == 2 and chunks[0] == 'autor':
 119             return pdcounter_views.author_detail(request, chunks[1])
 120         else:
 121             raise Http404
 122     except models.Tag.MultipleObjectsReturned, e:
 123         return differentiate_tags(request, e.tags, e.ambiguous_slugs)
 124     except models.Tag.UrlDeprecationWarning, e:
 125         return HttpResponsePermanentRedirect(reverse('tagged_object_list', args=['/'.join(tag.url_chunk for tag in e.tags)]))
 126
 127     try:
 128         if len(tags) > settings.MAX_TAG_LIST:
 129             raise Http404
 130     except AttributeError:
 131         pass
 132
 133     if len([tag for tag in tags if tag.category == 'book']):
 134         raise Http404
 135
 136     theme_is_set = [tag for tag in tags if tag.category == 'theme']
 137     shelf_is_set = [tag for tag in tags if tag.category == 'set']
 138     only_shelf = shelf_is_set and len(tags) == 1
 139     only_my_shelf = only_shelf and request.user.is_authenticated() and request.user == tags[0].user
 140
 141     objects = only_author = None
 142     categories = {}
 143
 144     if theme_is_set:
 145         shelf_tags = [tag for tag in tags if tag.category == 'set']
 146         fragment_tags = [tag for tag in tags if tag.category != 'set']
 147         fragments = models.Fragment.tagged.with_all(fragment_tags)
 148
 149         if shelf_tags:
 150             books = models.Book.tagged.with_all(shelf_tags).order_by()
 151             l_tags = models.Tag.objects.filter(category='book', slug__in=[book.book_tag_slug() for book in books])
 152             fragments = models.Fragment.tagged.with_any(l_tags, fragments)
 153
 154         # newtagging goes crazy if we just try:
 155         #related_tags = models.Tag.objects.usage_for_queryset(fragments, counts=True,
 156         #                    extra={'where': ["catalogue_tag.category != 'book'"]})
 157         fragment_keys = [fragment.pk for fragment in fragments]
 158         if fragment_keys:
 159             related_tags = models.Fragment.tags.usage(counts=True,
 160                                 filters={'pk__in': fragment_keys},
 161                                 extra={'where': ["catalogue_tag.category != 'book'"]})
 162             related_tags = (tag for tag in related_tags if tag not in fragment_tags)
 163             categories = split_tags(related_tags)
 164
 165             objects = fragments
 166     else:
 167         if shelf_is_set:
 168             objects = models.Book.tagged.with_all(tags)
 169         else:
 170             objects = models.Book.tagged_top_level(tags)
 171
 172         # get related tags from `tag_counter` and `theme_counter`
 173         related_counts = {}
 174         tags_pks = [tag.pk for tag in tags]
 175         for book in objects:
 176             for tag_pk, value in itertools.chain(book.tag_counter.iteritems(), book.theme_counter.iteritems()):
 177                 if tag_pk in tags_pks:
 178                     continue
 179                 related_counts[tag_pk] = related_counts.get(tag_pk, 0) + value
 180         related_tags = models.Tag.objects.filter(pk__in=related_counts.keys())
 181         related_tags = [tag for tag in related_tags if tag not in tags]
 182         for tag in related_tags:
 183             tag.count = related_counts[tag.pk]
 184
 185         categories = split_tags(related_tags)
 186         del related_tags
 187
 188     if not objects:
 189         only_author = len(tags) == 1 and tags[0].category == 'author'
 190         objects = models.Book.objects.none()
 191
 192     return object_list(
 193         request,
 194         objects,
 195         template_name='catalogue/tagged_object_list.html',
 196         extra_context={
 197             'categories': categories,
 198             'only_shelf': only_shelf,
 199             'only_author': only_author,
 200             'only_my_shelf': only_my_shelf,
 201             'formats_form': forms.DownloadFormatsForm(),
 202             'tags': tags,
 203         }
 204     )
 205
 206
 207 def book_fragments(request, book, theme_slug):
 208     kwargs = models.Book.split_urlid(book)
 209     if kwargs is None:
 210         raise Http404
 211     book = get_object_or_404(models.Book, **kwargs)
 212
 213     book_tag = book.book_tag()
 214     theme = get_object_or_404(models.Tag, slug=theme_slug, category='theme')
 215     fragments = models.Fragment.tagged.with_all([book_tag, theme])
 216
 217     form = forms.SearchForm()
 218     return render_to_response('catalogue/book_fragments.html', locals(),
 219         context_instance=RequestContext(request))
 220
 221
 222 def book_detail(request, book):
 223     kwargs = models.Book.split_urlid(book)
 224     if kwargs is None:
 225         raise Http404
 226     try:
 227         book = models.Book.objects.get(**kwargs)
 228     except models.Book.DoesNotExist:
 229         return pdcounter_views.book_stub_detail(request, kwargs['slug'])
 230
 231     book_tag = book.book_tag()
 232     tags = list(book.tags.filter(~Q(category='set')))
 233     categories = split_tags(tags)
 234     book_children = book.children.all().order_by('parent_number', 'sort_key')
 235
 236     _book = book
 237     parents = []
 238     while _book.parent:
 239         parents.append(_book.parent)
 240         _book = _book.parent
 241     parents = reversed(parents)
 242
 243     theme_counter = book.theme_counter
 244     book_themes = models.Tag.objects.filter(pk__in=theme_counter.keys())
 245     for tag in book_themes:
 246         tag.count = theme_counter[tag.pk]
 247
 248     extra_info = book.get_extra_info_value()
 249     hide_about = extra_info.get('about', '').startswith('http://wiki.wolnepodreczniki.pl')
 250
 251     projects = set()
 252     for m in book.media.filter(type='mp3'):
 253         # ogg files are always from the same project
 254         meta = m.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     projects = sorted(projects)
 262
 263     form = forms.SearchForm()
 264     custom_pdf_form = forms.CustomPDFForm()
 265     return render_to_response('catalogue/book_detail.html', locals(),
 266         context_instance=RequestContext(request))
 267
 268
 269 def book_text(request, book):
 270     kwargs = models.Book.split_fileid(book)
 271     if kwargs is None:
 272         raise Http404
 273     book = get_object_or_404(models.Book, **kwargs)
 274
 275     if not book.has_html_file():
 276         raise Http404
 277     book_themes = {}
 278     for fragment in book.fragments.all():
 279         for theme in fragment.tags.filter(category='theme'):
 280             book_themes.setdefault(theme, []).append(fragment)
 281
 282     book_themes = book_themes.items()
 283     book_themes.sort(key=lambda s: s[0].sort_key)
 284     return render_to_response('catalogue/book_text.html', locals(),
 285         context_instance=RequestContext(request))
 286
 287
 288 # ==========
 289 # = Search =
 290 # ==========
 291
 292 def _no_diacritics_regexp(query):
 293     """ returns a regexp for searching for a query without diacritics
 294
 295     should be locale-aware """
 296     names = {
 297         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',
 298         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'
 299         }
 300     def repl(m):
 301         l = m.group()
 302         return u"(%s)" % '|'.join(names[l])
 303     return re.sub(u'[%s]' % (u''.join(names.keys())), repl, query)
 304
 305 def unicode_re_escape(query):
 306     """ Unicode-friendly version of re.escape """
 307     return re.sub('(?u)(\W)', r'\\\1', query)
 308
 309 def _word_starts_with(name, prefix):
 310     """returns a Q object getting models having `name` contain a word
 311     starting with `prefix`
 312
 313     We define word characters as alphanumeric and underscore, like in JS.
 314
 315     Works for MySQL, PostgreSQL, Oracle.
 316     For SQLite, _sqlite* version is substituted for this.
 317     """
 318     kwargs = {}
 319
 320     prefix = _no_diacritics_regexp(unicode_re_escape(prefix))
 321     # can't use [[:<:]] (word start),
 322     # but we want both `xy` and `(xy` to catch `(xyz)`
 323     kwargs['%s__iregex' % name] = u"(^|[^[:alnum:]_])%s" % prefix
 324
 325     return Q(**kwargs)
 326
 327
 328 def _word_starts_with_regexp(prefix):
 329     prefix = _no_diacritics_regexp(unicode_re_escape(prefix))
 330     return ur"(^|(?<=[^\wąćęłńóśźżĄĆĘŁŃÓŚŹŻ]))%s" % prefix
 331
 332
 333 def _sqlite_word_starts_with(name, prefix):
 334     """ version of _word_starts_with for SQLite
 335
 336     SQLite in Django uses Python re module
 337     """
 338     kwargs = {}
 339     kwargs['%s__iregex' % name] = _word_starts_with_regexp(prefix)
 340     return Q(**kwargs)
 341
 342
 343 if hasattr(settings, 'DATABASES'):
 344     if settings.DATABASES['default']['ENGINE'] == 'django.db.backends.sqlite3':
 345         _word_starts_with = _sqlite_word_starts_with
 346 elif settings.DATABASE_ENGINE == 'sqlite3':
 347     _word_starts_with = _sqlite_word_starts_with
 348
 349
 350 class App():
 351     def __init__(self, name, view):
 352         self.name = name
 353         self._view = view
 354         self.lower = name.lower()
 355         self.category = 'application'
 356     def view(self):
 357         return reverse(*self._view)
 358
 359 _apps = (
 360     App(u'Leśmianator', (u'lesmianator', )),
 361     )
 362
 363
 364 def _tags_starting_with(prefix, user=None):
 365     prefix = prefix.lower()
 366     # PD counter
 367     book_stubs = pdcounter_models.BookStub.objects.filter(_word_starts_with('title', prefix))
 368     authors = pdcounter_models.Author.objects.filter(_word_starts_with('name', prefix))
 369
 370     books = models.Book.objects.filter(_word_starts_with('title', prefix))
 371     tags = models.Tag.objects.filter(_word_starts_with('name', prefix))
 372     if user and user.is_authenticated():
 373         tags = tags.filter(~Q(category='book') & (~Q(category='set') | Q(user=user)))
 374     else:
 375         tags = tags.filter(~Q(category='book') & ~Q(category='set'))
 376
 377     prefix_regexp = re.compile(_word_starts_with_regexp(prefix))
 378     return list(books) + list(tags) + [app for app in _apps if prefix_regexp.search(app.lower)] + list(book_stubs) + list(authors)
 379
 380
 381 def _get_result_link(match, tag_list):
 382     if isinstance(match, models.Tag):
 383         return reverse('catalogue.views.tagged_object_list',
 384             kwargs={'tags': '/'.join(tag.url_chunk for tag in tag_list + [match])}
 385         )
 386     elif isinstance(match, App):
 387         return match.view()
 388     else:
 389         return match.get_absolute_url()
 390
 391
 392 def _get_result_type(match):
 393     if isinstance(match, models.Book) or isinstance(match, pdcounter_models.BookStub):
 394         type = 'book'
 395     else:
 396         type = match.category
 397     return type
 398
 399
 400 def books_starting_with(prefix):
 401     prefix = prefix.lower()
 402     return models.Book.objects.filter(_word_starts_with('title', prefix))
 403
 404
 405 def find_best_matches(query, user=None):
 406     """ Finds a models.Book, Tag, models.BookStub or Author best matching a query.
 407
 408     Returns a with:
 409       - zero elements when nothing is found,
 410       - one element when a best result is found,
 411       - more then one element on multiple exact matches
 412
 413     Raises a ValueError on too short a query.
 414     """
 415
 416     query = query.lower()
 417     if len(query) < 2:
 418         raise ValueError("query must have at least two characters")
 419
 420     result = tuple(_tags_starting_with(query, user))
 421     # remove pdcounter stuff
 422     book_titles = set(match.pretty_title().lower() for match in result
 423                       if isinstance(match, models.Book))
 424     authors = set(match.name.lower() for match in result
 425                   if isinstance(match, models.Tag) and match.category=='author')
 426     result = tuple(res for res in result if not (
 427                  (isinstance(res, pdcounter_models.BookStub) and res.pretty_title().lower() in book_titles)
 428                  or (isinstance(res, pdcounter_models.Author) and res.name.lower() in authors)
 429              ))
 430
 431     exact_matches = tuple(res for res in result if res.name.lower() == query)
 432     if exact_matches:
 433         return exact_matches
 434     else:
 435         return tuple(result)[:1]
 436
 437
 438 def search(request):
 439     tags = request.GET.get('tags', '')
 440     prefix = request.GET.get('q', '')
 441
 442     try:
 443         tag_list = models.Tag.get_tag_list(tags)
 444     except:
 445         tag_list = []
 446
 447     try:
 448         result = find_best_matches(prefix, request.user)
 449     except ValueError:
 450         return render_to_response('catalogue/search_too_short.html', {'tags':tag_list, 'prefix':prefix},
 451             context_instance=RequestContext(request))
 452
 453     if len(result) == 1:
 454         return HttpResponseRedirect(_get_result_link(result[0], tag_list))
 455     elif len(result) > 1:
 456         return render_to_response('catalogue/search_multiple_hits.html',
 457             {'tags':tag_list, 'prefix':prefix, 'results':((x, _get_result_link(x, tag_list), _get_result_type(x)) for x in result)},
 458             context_instance=RequestContext(request))
 459     else:
 460         form = PublishingSuggestForm(initial={"books": prefix + ", "})
 461         return render_to_response('catalogue/search_no_hits.html',
 462             {'tags':tag_list, 'prefix':prefix, "pubsuggest_form": form},
 463             context_instance=RequestContext(request))
 464
 465
 466 def tags_starting_with(request):
 467     prefix = request.GET.get('q', '')
 468     # Prefix must have at least 2 characters
 469     if len(prefix) < 2:
 470         return HttpResponse('')
 471     tags_list = []
 472     result = ""
 473     for tag in _tags_starting_with(prefix, request.user):
 474         if not tag.name in tags_list:
 475             result += "\n" + tag.name
 476             tags_list.append(tag.name)
 477     return HttpResponse(result)
 478
 479 def json_tags_starting_with(request, callback=None):
 480     # Callback for JSONP
 481     prefix = request.GET.get('q', '')
 482     callback = request.GET.get('callback', '')
 483     # Prefix must have at least 2 characters
 484     if len(prefix) < 2:
 485         return HttpResponse('')
 486     tags_list = []
 487     for tag in _tags_starting_with(prefix, request.user):
 488         if not tag.name in tags_list:
 489             tags_list.append(tag.name)
 490     if request.GET.get('mozhint', ''):
 491         result = [prefix, tags_list]
 492     else:
 493         result = {"matches": tags_list}
 494     return JSONResponse(result, callback)
 495
 496 # ====================
 497 # = Shelf management =
 498 # ====================
 499 @login_required
 500 @cache.never_cache
 501 def user_shelves(request):
 502     shelves = models.Tag.objects.filter(category='set', user=request.user)
 503     new_set_form = forms.NewSetForm()
 504     return render_to_response('catalogue/user_shelves.html', locals(),
 505             context_instance=RequestContext(request))
 506
 507 @cache.never_cache
 508 def book_sets(request, book):
 509     if not request.user.is_authenticated():
 510         return HttpResponse(_('<p>To maintain your shelves you need to be logged in.</p>'))
 511
 512     kwargs = models.Book.split_urlid(book)
 513     if kwargs is None:
 514         raise Http404
 515     book = get_object_or_404(models.Book, **kwargs)
 516
 517     user_sets = models.Tag.objects.filter(category='set', user=request.user)
 518     book_sets = book.tags.filter(category='set', user=request.user)
 519
 520     if request.method == 'POST':
 521         form = forms.ObjectSetsForm(book, request.user, request.POST)
 522         if form.is_valid():
 523             old_shelves = list(book.tags.filter(category='set'))
 524             new_shelves = [models.Tag.objects.get(pk=id) for id in form.cleaned_data['set_ids']]
 525
 526             for shelf in [shelf for shelf in old_shelves if shelf not in new_shelves]:
 527                 shelf.book_count = None
 528                 shelf.save()
 529
 530             for shelf in [shelf for shelf in new_shelves if shelf not in old_shelves]:
 531                 shelf.book_count = None
 532                 shelf.save()
 533
 534             book.tags = new_shelves + list(book.tags.filter(~Q(category='set') | ~Q(user=request.user)))
 535             if request.is_ajax():
 536                 return JSONResponse('{"msg":"'+_("<p>Shelves were sucessfully saved.</p>")+'", "after":"close"}')
 537             else:
 538                 return HttpResponseRedirect('/')
 539     else:
 540         form = forms.ObjectSetsForm(book, request.user)
 541         new_set_form = forms.NewSetForm()
 542
 543     return render_to_response('catalogue/book_sets.html', locals(),
 544         context_instance=RequestContext(request))
 545
 546
 547 @login_required
 548 @require_POST
 549 @cache.never_cache
 550 def remove_from_shelf(request, shelf, book):
 551     kwargs = models.Book.split_urlid(book)
 552     if kwargs is None:
 553         raise Http404
 554     book = get_object_or_404(models.Book, **kwargs)
 555
 556     shelf = get_object_or_404(models.Tag, slug=shelf, category='set', user=request.user)
 557
 558     if shelf in book.tags:
 559         models.Tag.objects.remove_tag(book, shelf)
 560
 561         shelf.book_count = None
 562         shelf.save()
 563
 564         return HttpResponse(_('Book was successfully removed from the shelf'))
 565     else:
 566         return HttpResponse(_('This book is not on the shelf'))
 567
 568
 569 def collect_books(books):
 570     """
 571     Returns all real books in collection.
 572     """
 573     result = []
 574     for book in books:
 575         if len(book.children.all()) == 0:
 576             result.append(book)
 577         else:
 578             result += collect_books(book.children.all())
 579     return result
 580
 581
 582 @cache.never_cache
 583 def download_shelf(request, slug):
 584     """"
 585     Create a ZIP archive on disk and transmit it in chunks of 8KB,
 586     without loading the whole file into memory. A similar approach can
 587     be used for large dynamic PDF files.
 588     """
 589     from slughifi import slughifi
 590     import tempfile
 591     import zipfile
 592
 593     shelf = get_object_or_404(models.Tag, slug=slug, category='set')
 594
 595     formats = []
 596     form = forms.DownloadFormatsForm(request.GET)
 597     if form.is_valid():
 598         formats = form.cleaned_data['formats']
 599     if len(formats) == 0:
 600         formats = ['pdf', 'epub', 'mobi', 'odt', 'txt']
 601
 602     # Create a ZIP archive
 603     temp = tempfile.TemporaryFile()
 604     archive = zipfile.ZipFile(temp, 'w')
 605
 606     already = set()
 607     for book in collect_books(models.Book.tagged.with_all(shelf)):
 608         fileid = book.fileid()
 609         if 'pdf' in formats and book.pdf_file:
 610             filename = book.pdf_file.path
 611             archive.write(filename, str('%s.pdf' % fileid))
 612         if 'mobi' in formats and book.mobi_file:
 613             filename = book.mobi_file.path
 614             archive.write(filename, str('%s.mobi' % fileid))
 615         if book.root_ancestor not in already and 'epub' in formats and book.root_ancestor.epub_file:
 616             filename = book.root_ancestor.epub_file.path
 617             archive.write(filename, str('%s.epub' % book.root_ancestor.fileid()))
 618             already.add(book.root_ancestor)
 619         if 'odt' in formats and book.has_media("odt"):
 620             for file in book.get_media("odt"):
 621                 filename = file.file.path
 622                 archive.write(filename, str('%s.odt' % slughifi(file.name)))
 623         if 'txt' in formats and book.txt_file:
 624             filename = book.txt_file.path
 625             archive.write(filename, str('%s.txt' % fileid))
 626     archive.close()
 627
 628     response = HttpResponse(content_type='application/zip', mimetype='application/x-zip-compressed')
 629     response['Content-Disposition'] = 'attachment; filename=%s.zip' % slughifi(shelf.name)
 630     response['Content-Length'] = temp.tell()
 631
 632     temp.seek(0)
 633     response.write(temp.read())
 634     return response
 635
 636
 637 @cache.never_cache
 638 def shelf_book_formats(request, shelf):
 639     """"
 640     Returns a list of formats of books in shelf.
 641     """
 642     shelf = get_object_or_404(models.Tag, slug=shelf, category='set')
 643
 644     formats = {'pdf': False, 'epub': False, 'mobi': False, 'odt': False, 'txt': False}
 645
 646     for book in collect_books(models.Book.tagged.with_all(shelf)):
 647         if book.pdf_file:
 648             formats['pdf'] = True
 649         if book.root_ancestor.epub_file:
 650             formats['epub'] = True
 651         if book.mobi_file:
 652             formats['mobi'] = True
 653         if book.txt_file:
 654             formats['txt'] = True
 655         for format in ('odt',):
 656             if book.has_media(format):
 657                 formats[format] = True
 658
 659     return HttpResponse(LazyEncoder().encode(formats))
 660
 661
 662 @login_required
 663 @require_POST
 664 @cache.never_cache
 665 def new_set(request):
 666     new_set_form = forms.NewSetForm(request.POST)
 667     if new_set_form.is_valid():
 668         new_set = new_set_form.save(request.user)
 669
 670         if request.is_ajax():
 671             return JSONResponse('{"id":"%d", "name":"%s", "msg":"<p>Shelf <strong>%s</strong> was successfully created</p>"}' % (new_set.id, new_set.name, new_set))
 672         else:
 673             return HttpResponseRedirect('/')
 674
 675     return HttpResponseRedirect('/')
 676
 677
 678 @login_required
 679 @require_POST
 680 @cache.never_cache
 681 def delete_shelf(request, slug):
 682     user_set = get_object_or_404(models.Tag, slug=slug, category='set', user=request.user)
 683     user_set.delete()
 684
 685     if request.is_ajax():
 686         return HttpResponse(_('<p>Shelf <strong>%s</strong> was successfully removed</p>') % user_set.name)
 687     else:
 688         return HttpResponseRedirect('/')
 689
 690
 691 # ==================
 692 # = Authentication =
 693 # ==================
 694 @require_POST
 695 @cache.never_cache
 696 def login(request):
 697     form = AuthenticationForm(data=request.POST, prefix='login')
 698     if form.is_valid():
 699         auth.login(request, form.get_user())
 700         response_data = {'success': True, 'errors': {}}
 701     else:
 702         response_data = {'success': False, 'errors': form.errors}
 703     return HttpResponse(LazyEncoder(ensure_ascii=False).encode(response_data))
 704
 705
 706 @require_POST
 707 @cache.never_cache
 708 def register(request):
 709     registration_form = UserCreationForm(request.POST, prefix='registration')
 710     if registration_form.is_valid():
 711         user = registration_form.save()
 712         user = auth.authenticate(
 713             username=registration_form.cleaned_data['username'],
 714             password=registration_form.cleaned_data['password1']
 715         )
 716         auth.login(request, user)
 717         response_data = {'success': True, 'errors': {}}
 718     else:
 719         response_data = {'success': False, 'errors': registration_form.errors}
 720     return HttpResponse(LazyEncoder(ensure_ascii=False).encode(response_data))
 721
 722
 723 @cache.never_cache
 724 def logout_then_redirect(request):
 725     auth.logout(request)
 726     return HttpResponseRedirect(urlquote_plus(request.GET.get('next', '/'), safe='/?='))
 727
 728
 729
 730 # =========
 731 # = Admin =
 732 # =========
 733 @login_required
 734 @staff_required
 735 def import_book(request):
 736     """docstring for import_book"""
 737     book_import_form = forms.BookImportForm(request.POST, request.FILES)
 738     if book_import_form.is_valid():
 739         try:
 740             book_import_form.save()
 741         except:
 742             import sys
 743             import pprint
 744             import traceback
 745             info = sys.exc_info()
 746             exception = pprint.pformat(info[1])
 747             tb = '\n'.join(traceback.format_tb(info[2]))
 748             return HttpResponse(_("An error occurred: %(exception)s\n\n%(tb)s") % {'exception':exception, 'tb':tb}, mimetype='text/plain')
 749         return HttpResponse(_("Book imported successfully"))
 750     else:
 751         return HttpResponse(_("Error importing file: %r") % book_import_form.errors)
 752
 753
 754
 755 def clock(request):
 756     """ Provides server time for jquery.countdown,
 757     in a format suitable for Date.parse()
 758     """
 759     return HttpResponse(datetime.now().strftime('%Y/%m/%d %H:%M:%S'))
 760
 761
 762 # info views for API
 763
 764 def book_info(request, id, lang='pl'):
 765     book = get_object_or_404(models.Book, id=id)
 766     # set language by hand
 767     translation.activate(lang)
 768     return render_to_response('catalogue/book_info.html', locals(),
 769         context_instance=RequestContext(request))
 770
 771
 772 def tag_info(request, id):
 773     tag = get_object_or_404(models.Tag, id=id)
 774     return HttpResponse(tag.description)
 775
 776
 777 def download_zip(request, format, book=None):
 778     kwargs = models.Book.split_fileid(book)
 779
 780     url = None
 781     if format in ('pdf', 'epub', 'mobi'):
 782         url = models.Book.zip_format(format)
 783     elif format == 'audiobook' and kwargs is not None:
 784         book = get_object_or_404(models.Book, **kwargs)
 785         url = book.zip_audiobooks()
 786     else:
 787         raise Http404('No format specified for zip package')
 788     return HttpResponseRedirect(urlquote_plus(settings.MEDIA_URL + url, safe='/?='))
 789
 790
 791 def download_custom_pdf(request, book_fileid):
 792     kwargs = models.Book.split_fileid(book_fileid)
 793     if kwargs is None:
 794         raise Http404
 795     book = get_object_or_404(models.Book, **kwargs)
 796
 797     if request.method == 'GET':
 798         form = forms.CustomPDFForm(request.GET)
 799         if form.is_valid():
 800             cust = form.customizations
 801             pdf_file = models.get_customized_pdf_path(book, cust)
 802
 803             if not path.exists(pdf_file):
 804                 result = async_build_pdf.delay(book.id, cust, pdf_file)
 805                 result.wait()
 806             return AttachmentHttpResponse(file_name=("%s.pdf" % book_fileid), file_path=pdf_file, mimetype="application/pdf")
 807         else:
 808             raise Http404(_('Incorrect customization options for PDF'))
 809     else:
 810         raise Http404(_('Bad method'))