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.
12 from django.conf import settings
13 from django.template import RequestContext
14 from django.shortcuts import render_to_response, get_object_or_404
15 from django.http import HttpResponse, HttpResponseRedirect, Http404
16 from django.core.urlresolvers import reverse
17 from django.db.models import Q
18 from django.contrib.auth.decorators import login_required, user_passes_test
19 from django.utils.datastructures import SortedDict
20 from django.views.decorators.http import require_POST
21 from django.contrib import auth
22 from django.contrib.auth.forms import UserCreationForm, AuthenticationForm
23 from django.utils import simplejson
24 from django.utils.functional import Promise
25 from django.utils.encoding import force_unicode
26 from django.utils.http import urlquote_plus
27 from django.views.decorators import cache
28 from django.utils.translation import ugettext as _
30 from catalogue import models
31 from catalogue import forms
32 from catalogue.utils import split_tags
33 from newtagging import views as newtagging_views
36 staff_required = user_passes_test(lambda user: user.is_staff)
39 class LazyEncoder(simplejson.JSONEncoder):
40 def default(self, obj):
41 if isinstance(obj, Promise):
42 return force_unicode(obj)
46 def main_page(request):
47 if request.user.is_authenticated():
48 shelves = models.Tag.objects.filter(category='set', user=request.user)
49 new_set_form = forms.NewSetForm()
50 extra_where = "NOT catalogue_tag.category = 'set'"
51 tags = models.Tag.objects.usage_for_model(models.Book, counts=True, extra={'where': [extra_where]})
52 fragment_tags = models.Tag.objects.usage_for_model(models.Fragment, counts=True,
53 extra={'where': ["catalogue_tag.category = 'theme'"] + [extra_where]})
54 categories = split_tags(tags)
56 form = forms.SearchForm()
57 return render_to_response('catalogue/main_page.html', locals(),
58 context_instance=RequestContext(request))
61 def book_list(request):
62 books = models.Book.objects.all()
63 form = forms.SearchForm()
65 books_by_first_letter = SortedDict()
67 books_by_first_letter.setdefault(book.title[0], []).append(book)
69 return render_to_response('catalogue/book_list.html', locals(),
70 context_instance=RequestContext(request))
73 def tagged_object_list(request, tags=''):
74 # Prevent DoS attacks on our database
75 if len(tags.split('/')) > 6:
79 tags = models.Tag.get_tag_list(tags)
80 except models.Tag.DoesNotExist:
83 if len([tag for tag in tags if tag.category == 'book']):
86 theme_is_set = [tag for tag in tags if tag.category == 'theme']
87 shelf_is_set = len(tags) == 1 and tags[0].category == 'set'
88 my_shelf_is_set = shelf_is_set and request.user.is_authenticated() and request.user == shelf[0].user
90 objects = only_author = pd_counter = categories = None
93 shelf_tags = [tag for tag in tags if tag.category == 'set']
94 fragment_tags = [tag for tag in tags if tag.category != 'set']
95 fragments = models.Fragment.tagged.with_all(fragment_tags)
98 books = models.Book.tagged.with_all(shelf_tags)
99 l_tags = [models.Tag.objects.get(slug = 'l-' + book.slug) for book in books]
100 fragments = (fragment for fragment in models.Fragment.tagged.with_any(l_tags) if fragment in fragments)
102 fragment_keys = (fragment.pk for fragment in fragments)
104 related_tags = models.Fragment.tags.usage(counts=True,
105 filters={'pk__in': fragment_keys},
106 extra={'where': ["catalogue_tag.category != 'book'"]})
107 related_tags = (tag for tag in related_tags if tag not in fragment_tags)
108 categories = split_tags(related_tags)
112 books = models.Book.tagged.with_all(tags)
113 l_tags = [models.Tag.objects.get(slug = 'l-' + book.slug) for book in books]
114 book_keys = [book.pk for book in books]
116 related_tags = models.Book.tags.usage(counts=True,
117 filters={'pk__in': book_keys},
118 extra={'where': ["catalogue_tag.category NOT IN ('set', 'book', 'theme')"]})
119 categories = split_tags(related_tags)
121 fragment_keys = [fragment.pk for fragment in models.Fragment.tagged.with_any(l_tags)]
123 categories['theme'] = models.Fragment.tags.usage(counts=True,
124 filters={'pk__in': fragment_keys},
125 extra={'where': ["catalogue_tag.category = 'theme'"]})
127 books = books.exclude(parent__in = book_keys)
131 only_author = len(tags) == 1 and tags[0].category == 'author'
132 pd_counter = only_author and tags[0].goes_to_pd()
133 objects = models.Book.objects.none()
135 return newtagging_views.tagged_object_list(
137 tag_model=models.Tag,
138 queryset_or_model=objects,
140 template_name='catalogue/tagged_object_list.html',
142 'categories': categories,
143 'shelf_is_set': shelf_is_set,
144 'only_author': only_author,
145 'pd_counter': pd_counter,
146 'user_is_owner': my_shelf_is_set,
147 'formats_form': forms.DownloadFormatsForm(),
152 def book_fragments(request, book_slug, theme_slug):
153 book = get_object_or_404(models.Book, slug=book_slug)
154 book_tag = get_object_or_404(models.Tag, slug='l-' + book_slug)
155 theme = get_object_or_404(models.Tag, slug=theme_slug)
156 fragments = models.Fragment.tagged.with_all([book_tag, theme])
158 form = forms.SearchForm()
159 return render_to_response('catalogue/book_fragments.html', locals(),
160 context_instance=RequestContext(request))
163 def book_detail(request, slug):
165 book = models.Book.objects.get(slug=slug)
166 except models.Book.DoesNotExist:
167 return book_stub_detail(request, slug)
169 book_tag = get_object_or_404(models.Tag, slug = 'l-' + slug)
170 tags = list(book.tags.filter(~Q(category='set')))
171 categories = split_tags(tags)
172 book_children = book.children.all().order_by('parent_number')
173 extra_where = "catalogue_tag.category = 'theme'"
174 book_themes = models.Tag.objects.related_for_model(book_tag, models.Fragment, counts=True, extra={'where': [extra_where]})
175 extra_info = book.get_extra_info_value()
177 form = forms.SearchForm()
178 return render_to_response('catalogue/book_detail.html', locals(),
179 context_instance=RequestContext(request))
182 def book_stub_detail(request, slug):
183 book = get_object_or_404(models.BookStub, slug=slug)
185 form = forms.SearchForm()
187 return render_to_response('catalogue/book_stub_detail.html', locals(),
188 context_instance=RequestContext(request))
191 def book_text(request, slug):
192 book = get_object_or_404(models.Book, slug=slug)
194 for fragment in book.fragments.all():
195 for theme in fragment.tags.filter(category='theme'):
196 book_themes.setdefault(theme, []).append(fragment)
198 book_themes = book_themes.items()
199 book_themes.sort(key=lambda s: s[0].sort_key)
200 return render_to_response('catalogue/book_text.html', locals(),
201 context_instance=RequestContext(request))
208 def _no_diacritics_regexp(query):
209 """ returns a regexp for searching for a query without diacritics
211 should be locale-aware """
212 names = {'a':u'ą', 'c':u'ć', 'e':u'ę', 'l': u'ł', 'n':u'ń', 'o':u'ó', 's':u'ś', 'z':u'ź|ż'}
215 return "(%s|%s)" % (l, names[l])
216 return re.sub('[%s]'%(''.join(names.keys())), repl, query)
218 def _word_starts_with(name, prefix):
219 """returns a Q object getting models having `name` contain a word
220 starting with `prefix`
223 if settings.DATABASE_ENGINE in ('mysql', 'postgresql_psycopg2', 'postgresql'):
224 prefix = _no_diacritics_regexp(re.escape(prefix))
225 # we could use a [[:<:]] (word start),
226 # but we want both `xy` and `(xy` to catch `(xyz)`
227 kwargs['%s__iregex' % name] = u"(^|[^[:alpha:]])%s" % prefix
229 # don't know how to do a generic regex
230 # checking for simple icontain instead
231 kwargs['%s__icontains' % name] = prefix
235 def _tags_exact_matches(prefix, user):
236 book_stubs = models.BookStub.objects.filter(title__iexact = prefix)
237 books = models.Book.objects.filter(title__iexact = prefix)
238 book_stubs = filter(lambda x: x not in books, book_stubs)
239 tags = models.Tag.objects.filter(name__iexact = prefix)
240 if user.is_authenticated():
241 tags = tags.filter(~Q(category='book') & (~Q(category='set') | Q(user=user)))
243 tags = tags.filter(~Q(category='book') & ~Q(category='set'))
245 return list(books) + list(tags) + list(book_stubs)
248 def _tags_starting_with(prefix, user):
249 book_stubs = models.BookStub.objects.filter(_word_starts_with('title', prefix))
250 books = models.Book.objects.filter(_word_starts_with('title', prefix))
251 book_stubs = filter(lambda x: x not in books, book_stubs)
252 tags = models.Tag.objects.filter(_word_starts_with('name', prefix))
253 if user.is_authenticated():
254 tags = tags.filter(~Q(category='book') & (~Q(category='set') | Q(user=user)))
256 tags = tags.filter(~Q(category='book') & ~Q(category='set'))
258 return list(books) + list(tags) + list(book_stubs)
262 def _get_result_link(match, tag_list):
263 if isinstance(match, models.Book) or isinstance(match, models.BookStub):
264 return match.get_absolute_url()
266 return reverse('catalogue.views.tagged_object_list',
267 kwargs={'tags': '/'.join(tag.slug for tag in tag_list + [match])}
270 def _get_result_type(match):
271 if isinstance(match, models.Book) or isinstance(match, models.BookStub):
274 type = match.category
275 return dict(models.TAG_CATEGORIES)[type]
280 tags = request.GET.get('tags', '')
281 prefix = request.GET.get('q', '')
284 tag_list = models.Tag.get_tag_list(tags)
288 # Prefix must have at least 2 characters
290 return render_to_response('catalogue/search_too_short.html', {'tags':tag_list, 'prefix':prefix},
291 context_instance=RequestContext(request))
293 result = _tags_exact_matches(prefix, request.user)
296 # multiple exact matches
297 return render_to_response('catalogue/search_multiple_hits.html',
298 {'tags':tag_list, 'prefix':prefix, 'results':((x, _get_result_link(x, tag_list), _get_result_type(x)) for x in result)},
299 context_instance=RequestContext(request))
303 result = _tags_starting_with(prefix, request.user)
306 return HttpResponseRedirect(_get_result_link(result[0], tag_list))
308 return render_to_response('catalogue/search_no_hits.html', {'tags':tag_list, 'prefix':prefix},
309 context_instance=RequestContext(request))
312 def tags_starting_with(request):
313 prefix = request.GET.get('q', '')
314 # Prefix must have at least 2 characters
316 return HttpResponse('')
318 return HttpResponse('\n'.join(tag.name for tag in _tags_starting_with(prefix, request.user)))
321 # ====================
322 # = Shelf management =
323 # ====================
326 def user_shelves(request):
327 shelves = models.Tag.objects.filter(category='set', user=request.user)
328 new_set_form = forms.NewSetForm()
329 return render_to_response('catalogue/user_shelves.html', locals(),
330 context_instance=RequestContext(request))
333 def book_sets(request, slug):
334 book = get_object_or_404(models.Book, slug=slug)
335 user_sets = models.Tag.objects.filter(category='set', user=request.user)
336 book_sets = book.tags.filter(category='set', user=request.user)
338 if not request.user.is_authenticated():
339 return HttpResponse(_('<p>To maintain your shelves you need to be logged in.</p>'))
341 if request.method == 'POST':
342 form = forms.ObjectSetsForm(book, request.user, request.POST)
344 old_shelves = list(book.tags.filter(category='set'))
345 new_shelves = [models.Tag.objects.get(pk=id) for id in form.cleaned_data['set_ids']]
347 for shelf in [shelf for shelf in old_shelves if shelf not in new_shelves]:
348 shelf.book_count -= 1
351 for shelf in [shelf for shelf in new_shelves if shelf not in old_shelves]:
352 shelf.book_count += 1
355 book.tags = new_shelves + list(book.tags.filter(~Q(category='set') | ~Q(user=request.user)))
356 if request.is_ajax():
357 return HttpResponse(_('<p>Shelves were sucessfully saved.</p>'))
359 return HttpResponseRedirect('/')
361 form = forms.ObjectSetsForm(book, request.user)
362 new_set_form = forms.NewSetForm()
364 return render_to_response('catalogue/book_sets.html', locals(),
365 context_instance=RequestContext(request))
371 def remove_from_shelf(request, shelf, book):
372 book = get_object_or_404(models.Book, slug=book)
373 shelf = get_object_or_404(models.Tag, slug=shelf, category='set', user=request.user)
375 if shelf in book.tags:
376 models.Tag.objects.remove_tag(book, shelf)
378 shelf.book_count -= 1
381 return HttpResponse(_('Book was successfully removed from the shelf'))
383 return HttpResponse(_('This book is not on the shelf'))
386 def collect_books(books):
388 Returns all real books in collection.
392 if len(book.children.all()) == 0:
395 result += collect_books(book.children.all())
400 def download_shelf(request, slug):
402 Create a ZIP archive on disk and transmit it in chunks of 8KB,
403 without loading the whole file into memory. A similar approach can
404 be used for large dynamic PDF files.
406 shelf = get_object_or_404(models.Tag, slug=slug, category='set')
409 form = forms.DownloadFormatsForm(request.GET)
411 formats = form.cleaned_data['formats']
412 if len(formats) == 0:
413 formats = ['pdf', 'odt', 'txt', 'mp3', 'ogg']
415 # Create a ZIP archive
416 temp = tempfile.TemporaryFile()
417 archive = zipfile.ZipFile(temp, 'w')
419 for book in collect_books(models.Book.tagged.with_all(shelf)):
420 if 'pdf' in formats and book.pdf_file:
421 filename = book.pdf_file.path
422 archive.write(filename, str('%s.pdf' % book.slug))
423 if 'odt' in formats and book.odt_file:
424 filename = book.odt_file.path
425 archive.write(filename, str('%s.odt' % book.slug))
426 if 'txt' in formats and book.txt_file:
427 filename = book.txt_file.path
428 archive.write(filename, str('%s.txt' % book.slug))
429 if 'mp3' in formats and book.mp3_file:
430 filename = book.mp3_file.path
431 archive.write(filename, str('%s.mp3' % book.slug))
432 if 'ogg' in formats and book.ogg_file:
433 filename = book.ogg_file.path
434 archive.write(filename, str('%s.ogg' % book.slug))
437 response = HttpResponse(content_type='application/zip', mimetype='application/x-zip-compressed')
438 response['Content-Disposition'] = 'attachment; filename=%s.zip' % shelf.sort_key
439 response['Content-Length'] = temp.tell()
442 response.write(temp.read())
447 def shelf_book_formats(request, shelf):
449 Returns a list of formats of books in shelf.
451 shelf = get_object_or_404(models.Tag, slug=shelf, category='set')
453 formats = {'pdf': False, 'odt': False, 'txt': False, 'mp3': False, 'ogg': False}
455 for book in collect_books(models.Book.tagged.with_all(shelf)):
457 formats['pdf'] = True
459 formats['odt'] = True
461 formats['txt'] = True
463 formats['mp3'] = True
465 formats['ogg'] = True
467 return HttpResponse(LazyEncoder().encode(formats))
473 def new_set(request):
474 new_set_form = forms.NewSetForm(request.POST)
475 if new_set_form.is_valid():
476 new_set = new_set_form.save(request.user)
478 if request.is_ajax():
479 return HttpResponse(_('<p>Shelf <strong>%s</strong> was successfully created</p>') % new_set)
481 return HttpResponseRedirect('/')
483 return HttpResponseRedirect('/')
489 def delete_shelf(request, slug):
490 user_set = get_object_or_404(models.Tag, slug=slug, category='set', user=request.user)
493 if request.is_ajax():
494 return HttpResponse(_('<p>Shelf <strong>%s</strong> was successfully removed</p>') % user_set.name)
496 return HttpResponseRedirect('/')
505 form = AuthenticationForm(data=request.POST, prefix='login')
507 auth.login(request, form.get_user())
508 response_data = {'success': True, 'errors': {}}
510 response_data = {'success': False, 'errors': form.errors}
511 return HttpResponse(LazyEncoder(ensure_ascii=False).encode(response_data))
516 def register(request):
517 registration_form = UserCreationForm(request.POST, prefix='registration')
518 if registration_form.is_valid():
519 user = registration_form.save()
520 user = auth.authenticate(
521 username=registration_form.cleaned_data['username'],
522 password=registration_form.cleaned_data['password1']
524 auth.login(request, user)
525 response_data = {'success': True, 'errors': {}}
527 response_data = {'success': False, 'errors': registration_form.errors}
528 return HttpResponse(LazyEncoder(ensure_ascii=False).encode(response_data))
532 def logout_then_redirect(request):
534 return HttpResponseRedirect(urlquote_plus(request.GET.get('next', '/'), safe='/?='))
543 def import_book(request):
544 """docstring for import_book"""
545 book_import_form = forms.BookImportForm(request.POST, request.FILES)
546 if book_import_form.is_valid():
548 book_import_form.save()
550 info = sys.exc_info()
551 exception = pprint.pformat(info[1])
552 tb = '\n'.join(traceback.format_tb(info[2]))
553 _('Today is %(month)s, %(day)s.') % {'month': m, 'day': d}
554 return HttpResponse(_("An error occurred: %(exception)s\n\n%(tb)s") % {'exception':exception, 'tb':tb}, mimetype='text/plain')
555 return HttpResponse(_("Book imported successfully"))
557 return HttpResponse(_("Error importing file: %r") % book_import_form.errors)
562 """ Provides server time for jquery.countdown,
563 in a format suitable for Date.parse()
565 from datetime import datetime
566 return HttpResponse(datetime.now().strftime('%Y/%m/%d %H:%M:%S'))