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