apps/catalogue/views.py

   1 # -*- coding: utf-8 -*-
   2 from django.template import RequestContext
   3 from django.shortcuts import render_to_response, get_object_or_404
   4 from django.http import HttpResponse, HttpResponseRedirect, Http404
   5 from django.core.urlresolvers import reverse
   6 from django.db.models import Q
   7 from django.contrib.auth.decorators import login_required
   8 from django.utils.datastructures import SortedDict
   9 from django.views.decorators.http import require_POST
  10 from django.contrib import auth
  11 from django.contrib.auth.forms import UserCreationForm, AuthenticationForm
  12 from django.utils import simplejson
  13 from django.utils.functional import Promise
  14 from django.utils.encoding import force_unicode
  15 from django.views.decorators import cache
  16
  17 from catalogue import models
  18 from catalogue import forms
  19 from catalogue.utils import split_tags
  20 from newtagging import views as newtagging_views
  21
  22
  23 class LazyEncoder(simplejson.JSONEncoder):
  24     def default(self, obj):
  25         if isinstance(obj, Promise):
  26             return force_unicode(obj)
  27         return obj
  28
  29
  30 @cache.cache_control(must_revalidate=True, max_age=3600)
  31 def main_page(request):
  32     if request.user.is_authenticated():
  33         shelves = models.Tag.objects.filter(category='set', user=request.user)
  34         new_set_form = forms.NewSetForm()
  35     extra_where = 'NOT catalogue_tag.category = "set"'
  36     tags = models.Tag.objects.usage_for_model(models.Book, counts=True, extra={'where': [extra_where]})
  37     fragment_tags = models.Tag.objects.usage_for_model(models.Fragment, counts=True,
  38         extra={'where': ['catalogue_tag.category = "theme"'] + [extra_where]})
  39     categories = split_tags(tags)
  40
  41     form = forms.SearchForm()
  42     return render_to_response('catalogue/main_page.html', locals(),
  43         context_instance=RequestContext(request))
  44
  45
  46 def book_list(request):
  47     books = models.Book.objects.all()
  48     form = forms.SearchForm()
  49
  50     books_by_first_letter = SortedDict()
  51     for book in books:
  52         books_by_first_letter.setdefault(book.title[0], []).append(book)
  53
  54     return render_to_response('catalogue/book_list.html', locals(),
  55         context_instance=RequestContext(request))
  56
  57
  58 @cache.cache_control(must_revalidate=True, max_age=3600)
  59 def tagged_object_list(request, tags=''):
  60     # Prevent DoS attacks on our database
  61     if len(tags.split('/')) > 6:
  62         raise Http404
  63
  64     try:
  65         tags = models.Tag.get_tag_list(tags)
  66     except models.Tag.DoesNotExist:
  67         raise Http404
  68
  69     model = models.Book
  70     shelf_is_set = (len(tags) == 1 and tags[0].category == 'set')
  71     theme_is_set = len([tag for tag in tags if tag.category == 'theme']) > 0
  72     if theme_is_set:
  73         model = models.Fragment
  74
  75     extra_where = 'NOT catalogue_tag.category = "set"'
  76     related_tags = models.Tag.objects.related_for_model(tags, model, counts=True, extra={'where': [extra_where]})
  77     categories = split_tags(related_tags)
  78
  79     if not theme_is_set:
  80         model=models.Book.objects.filter(parent=None)
  81
  82     return newtagging_views.tagged_object_list(
  83         request,
  84         tag_model=models.Tag,
  85         queryset_or_model=model,
  86         tags=tags,
  87         template_name='catalogue/tagged_object_list.html',
  88         extra_context = {'categories': categories, 'shelf_is_set': shelf_is_set },
  89     )
  90
  91
  92 def book_detail(request, slug):
  93     book = get_object_or_404(models.Book, slug=slug)
  94     tags = list(book.tags.filter(~Q(category='set')))
  95     categories = split_tags(tags)
  96     book_children = book.children.all().order_by('parent_number')
  97
  98     form = forms.SearchForm()
  99     return render_to_response('catalogue/book_detail.html', locals(),
 100         context_instance=RequestContext(request))
 101
 102
 103 def book_text(request, slug):
 104     book = get_object_or_404(models.Book, slug=slug)
 105     book_themes = {}
 106     for fragment in book.fragments.all():
 107         for theme in fragment.tags.filter(category='theme'):
 108             book_themes.setdefault(theme, []).append(fragment)
 109
 110     book_themes = book_themes.items()
 111     book_themes.sort(key=lambda s: s[0].sort_key)
 112     return render_to_response('catalogue/book_text.html', locals(),
 113         context_instance=RequestContext(request))
 114
 115
 116 # ==========
 117 # = Search =
 118 # ==========
 119 def search(request):
 120     query = request.GET.get('q', '')
 121     tags = request.GET.get('tags', '')
 122     if tags == '':
 123         tags = []
 124
 125     try:
 126         tag_list = models.Tag.get_tag_list(tags)
 127         tag = models.Tag.objects.get(name=query)
 128     except models.Tag.DoesNotExist:
 129         try:
 130             book = models.Book.objects.get(title=query)
 131             return HttpResponseRedirect(book.get_absolute_url())
 132         except models.Book.DoesNotExist:
 133             return HttpResponseRedirect(reverse('catalogue.views.main_page'))
 134     else:
 135         tag_list.append(tag)
 136         return HttpResponseRedirect(reverse('catalogue.views.tagged_object_list',
 137             kwargs={'tags': '/'.join(tag.slug for tag in tag_list)}
 138         ))
 139
 140
 141 def tags_starting_with(request):
 142     try:
 143         prefix = request.GET['q']
 144         if len(prefix) < 2:
 145             raise KeyError
 146
 147         books = models.Book.objects.filter(title__icontains=prefix)
 148         tags = models.Tag.objects.filter(name__icontains=prefix)
 149         if request.user.is_authenticated():
 150             tags = tags.filter(~Q(category='set') | Q(user=request.user))
 151         else:
 152             tags = tags.filter(~Q(category='set'))
 153
 154         completions = [book.title for book in books] + [tag.name for tag in tags]
 155
 156         return HttpResponse('\n'.join(completions))
 157
 158     except KeyError:
 159         return HttpResponse('')
 160
 161
 162 # ====================
 163 # = Shelf management =
 164 # ====================
 165 @login_required
 166 @cache.cache_control(must_revalidate=True, max_age=3600, private=True)
 167 def user_shelves(request):
 168     shelves = models.Tag.objects.filter(category='set', user=request.user)
 169     new_set_form = forms.NewSetForm()
 170     return render_to_response('catalogue/user_shelves.html', locals(),
 171             context_instance=RequestContext(request))
 172
 173
 174 @cache.cache_control(must_revalidate=True, max_age=3600, private=True)
 175 def book_sets(request, slug):
 176     book = get_object_or_404(models.Book, slug=slug)
 177     user_sets = models.Tag.objects.filter(category='set', user=request.user)
 178     book_sets = book.tags.filter(category='set', user=request.user)
 179
 180     if not request.user.is_authenticated():
 181         return HttpResponse('<p>Aby zarządzać swoimi półkami, musisz się zalogować.</p>')
 182
 183     if request.method == 'POST':
 184         form = forms.ObjectSetsForm(book, request.user, request.POST)
 185         if form.is_valid():
 186             book.tags = ([models.Tag.objects.get(pk=id) for id in form.cleaned_data['set_ids']] +
 187                 list(book.tags.filter(~Q(category='set') | ~Q(user=request.user))))
 188             if request.is_ajax():
 189                 return HttpResponse('<p>Półki zostały zapisane.</p>')
 190             else:
 191                 return HttpResponseRedirect('/')
 192     else:
 193         form = forms.ObjectSetsForm(book, request.user)
 194         new_set_form = forms.NewSetForm()
 195
 196     return render_to_response('catalogue/book_sets.html', locals(),
 197         context_instance=RequestContext(request))
 198
 199
 200 @login_required
 201 @require_POST
 202 @cache.never_cache
 203 def new_set(request):
 204     new_set_form = forms.NewSetForm(request.POST)
 205     if new_set_form.is_valid():
 206         new_set = new_set_form.save(request.user)
 207
 208         if request.is_ajax():
 209             return HttpResponse(u'<p>Półka <strong>%s</strong> została utworzona</p>' % new_set)
 210         else:
 211             return HttpResponseRedirect('/')
 212
 213     return render_to_response('catalogue/book_sets.html', locals(),
 214             context_instance=RequestContext(request))
 215
 216
 217 @login_required
 218 @require_POST
 219 @cache.never_cache
 220 def delete_shelf(request, slug):
 221     user_set = get_object_or_404(models.Tag, slug=slug, category='set', user=request.user)
 222     user_set.delete()
 223
 224     if request.is_ajax():
 225         return HttpResponse(u'<p>Półka <strong>%s</strong> została usunięta</p>' % user_set.name)
 226     else:
 227         return HttpResponseRedirect('/')
 228
 229
 230 # ==================
 231 # = Authentication =
 232 # ==================
 233 @require_POST
 234 @cache.never_cache
 235 def login(request):
 236     form = AuthenticationForm(data=request.POST, prefix='login')
 237     if form.is_valid():
 238         auth.login(request, form.get_user())
 239         response_data = {'success': True, 'errors': {}}
 240     else:
 241         response_data = {'success': False, 'errors': form.errors}
 242     return HttpResponse(LazyEncoder(ensure_ascii=False).encode(response_data))
 243
 244
 245 @require_POST
 246 @cache.never_cache
 247 def register(request):
 248     registration_form = UserCreationForm(request.POST, prefix='registration')
 249     if registration_form.is_valid():
 250         user = registration_form.save()
 251         user = auth.authenticate(
 252             username=registration_form.cleaned_data['username'],
 253             password=registration_form.cleaned_data['password1']
 254         )
 255         auth.login(request, user)
 256         response_data = {'success': True, 'errors': {}}
 257     else:
 258         response_data = {'success': False, 'errors': registration_form.errors}
 259     return HttpResponse(LazyEncoder(ensure_ascii=False).encode(response_data))
 260
 261
 262 @cache.never_cache
 263 def logout_then_redirect(request):
 264     auth.logout(request)
 265     return HttpResponseRedirect(request.GET.get('next', '/'))
 266