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
  16 from catalogue import models
  17 from catalogue import forms
  18 from catalogue.utils import split_tags
  19 from newtagging import views as newtagging_views
  20
  21
  22 class LazyEncoder(simplejson.JSONEncoder):
  23     def default(self, obj):
  24         if isinstance(obj, Promise):
  25             return force_unicode(obj)
  26         return obj
  27
  28
  29 def search(request):
  30     query = request.GET.get('q', '')
  31     tags = request.GET.get('tags', '')
  32     if tags == '':
  33         tags = []
  34
  35     try:
  36         tag_list = models.Tag.get_tag_list(tags)
  37         tag = models.Tag.objects.get(name=query)
  38     except models.Tag.DoesNotExist:
  39         try:
  40             book = models.Book.objects.get(title=query)
  41             return HttpResponseRedirect(book.get_absolute_url())
  42         except models.Book.DoesNotExist:
  43             return HttpResponseRedirect(reverse('catalogue.views.main_page'))
  44     else:
  45         tag_list.append(tag)
  46         return HttpResponseRedirect(reverse('catalogue.views.tagged_object_list',
  47             kwargs={'tags': '/'.join(tag.slug for tag in tag_list)}
  48         ))
  49
  50
  51 def tags_starting_with(request):
  52     try:
  53         prefix = request.GET['q']
  54         if len(prefix) < 2:
  55             raise KeyError
  56
  57         books = models.Book.objects.filter(title__icontains=prefix)
  58         tags = models.Tag.objects.filter(name__icontains=prefix)
  59         if request.user.is_authenticated():
  60             tags = tags.filter(~Q(category='set') | Q(user=request.user))
  61         else:
  62             tags = tags.filter(~Q(category='set'))
  63
  64         completions = [book.title for book in books] + [tag.name for tag in tags]
  65
  66         return HttpResponse('\n'.join(completions))
  67
  68     except KeyError:
  69         return HttpResponse('')
  70
  71
  72 def main_page(request):
  73     if request.user.is_authenticated():
  74         shelves = models.Tag.objects.filter(category='set', user=request.user)
  75         new_set_form = forms.NewSetForm()
  76     extra_where = 'NOT catalogue_tag.category = "set"'
  77     tags = models.Tag.objects.usage_for_model(models.Book, counts=True, extra={'where': [extra_where]})
  78     fragment_tags = models.Tag.objects.usage_for_model(models.Fragment, counts=True,
  79         extra={'where': ['catalogue_tag.category = "theme"'] + [extra_where]})
  80     categories = split_tags(tags)
  81
  82     form = forms.SearchForm()
  83     return render_to_response('catalogue/main_page.html', locals(),
  84         context_instance=RequestContext(request))
  85
  86
  87 def book_list(request):
  88     books = models.Book.objects.all()
  89     form = forms.SearchForm()
  90
  91     books_by_first_letter = SortedDict()
  92     for book in books:
  93         books_by_first_letter.setdefault(book.title[0], []).append(book)
  94
  95     return render_to_response('catalogue/book_list.html', locals(),
  96         context_instance=RequestContext(request))
  97
  98
  99 def tagged_object_list(request, tags=''):
 100     # Prevent DoS attacks on our database
 101     if len(tags.split('/')) > 6:
 102         raise Http404
 103
 104     try:
 105         tags = models.Tag.get_tag_list(tags)
 106     except models.Tag.DoesNotExist:
 107         raise Http404
 108
 109     model = models.Book
 110     shelf_is_set = (len(tags) == 1 and tags[0].category == 'set')
 111     theme_is_set = any(tag.category == 'theme' for tag in tags)
 112     if theme_is_set:
 113         model = models.Fragment
 114
 115     extra_where = 'NOT catalogue_tag.category = "set"'
 116     related_tags = models.Tag.objects.related_for_model(tags, model, counts=True, extra={'where': [extra_where]})
 117     categories = split_tags(related_tags)
 118
 119     return newtagging_views.tagged_object_list(
 120         request,
 121         tag_model=models.Tag,
 122         queryset_or_model=model,
 123         tags=tags,
 124         template_name='catalogue/tagged_object_list.html',
 125         extra_context = {'categories': categories, 'shelf_is_set': shelf_is_set },
 126     )
 127
 128
 129 def book_detail(request, slug):
 130     book = get_object_or_404(models.Book, slug=slug)
 131     tags = list(book.tags.filter(~Q(category='set')))
 132     categories = split_tags(tags)
 133
 134     form = forms.SearchForm()
 135     return render_to_response('catalogue/book_detail.html', locals(),
 136         context_instance=RequestContext(request))
 137
 138
 139 def logout_then_redirect(request):
 140     auth.logout(request)
 141     return HttpResponseRedirect(request.GET.get('next', '/'))
 142
 143
 144 @require_POST
 145 def register(request):
 146     registration_form = UserCreationForm(request.POST, prefix='registration')
 147     if registration_form.is_valid():
 148         user = registration_form.save()
 149         user = auth.authenticate(
 150             username=registration_form.cleaned_data['username'],
 151             password=registration_form.cleaned_data['password1']
 152         )
 153         auth.login(request, user)
 154         response_data = {'success': True, 'errors': {}}
 155     else:
 156         response_data = {'success': False, 'errors': registration_form.errors}
 157     return HttpResponse(LazyEncoder(ensure_ascii=False).encode(response_data))
 158
 159
 160 @require_POST
 161 def login(request):
 162     form = AuthenticationForm(data=request.POST, prefix='login')
 163     if form.is_valid():
 164         auth.login(request, form.get_user())
 165         response_data = {'success': True, 'errors': {}}
 166     else:
 167         response_data = {'success': False, 'errors': form.errors}
 168     return HttpResponse(LazyEncoder(ensure_ascii=False).encode(response_data))
 169
 170
 171 def book_sets(request, slug):
 172     book = get_object_or_404(models.Book, slug=slug)
 173     user_sets = models.Tag.objects.filter(category='set', user=request.user)
 174     book_sets = book.tags.filter(category='set', user=request.user)
 175
 176     if not request.user.is_authenticated():
 177         return HttpResponse('<p>Aby zarządzać swoimi półkami, musisz się zalogować.</p>')
 178
 179     if request.method == 'POST':
 180         form = forms.ObjectSetsForm(book, request.user, request.POST)
 181         if form.is_valid():
 182             book.tags = ([models.Tag.objects.get(pk=id) for id in form.cleaned_data['set_ids']] +
 183                 list(book.tags.filter(~Q(category='set') | ~Q(user=request.user))))
 184             if request.is_ajax():
 185                 return HttpResponse('<p>Półki zostały zapisane.</p>')
 186             else:
 187                 return HttpResponseRedirect('/')
 188     else:
 189         form = forms.ObjectSetsForm(book, request.user)
 190         new_set_form = forms.NewSetForm()
 191
 192     return render_to_response('catalogue/book_sets.html', locals(),
 193         context_instance=RequestContext(request))
 194
 195
 196 def fragment_sets(request, id):
 197     fragment = get_object_or_404(models.Fragment, pk=id)
 198     user_sets = models.Tag.objects.filter(category='set', user=request.user)
 199     fragment_sets = fragment.tags.filter(category='set', user=request.user)
 200
 201     if not request.user.is_authenticated():
 202         return HttpResponse('<p>Aby zarządzać swoimi półkami, musisz się zalogować.</p>')
 203
 204     if request.method == 'POST':
 205         form = forms.ObjectSetsForm(fragment, request.user, request.POST)
 206         if form.is_valid():
 207             fragment.tags = ([models.Tag.objects.get(pk=id) for id in form.cleaned_data['set_ids']] +
 208                 list(fragment.tags.filter(~Q(category='set') | ~Q(user=request.user))))
 209             if request.is_ajax():
 210                 return HttpResponse('<p>Półki zostały zapisane.</p>')
 211             else:
 212                 return HttpResponseRedirect('/')
 213     else:
 214         form = forms.ObjectSetsForm(fragment, request.user)
 215         new_set_form = forms.NewSetForm()
 216
 217     return render_to_response('catalogue/fragment_sets.html', locals(),
 218         context_instance=RequestContext(request))
 219
 220
 221 @login_required
 222 @require_POST
 223 def new_set(request):
 224     new_set_form = forms.NewSetForm(request.POST)
 225     if new_set_form.is_valid():
 226         new_set = new_set_form.save(request.user)
 227
 228         if request.is_ajax():
 229             return HttpResponse(u'<p>Półka <strong>%s</strong> została utworzona</p>' % new_set)
 230         else:
 231             return HttpResponseRedirect('/')
 232
 233     return render_to_response('catalogue/book_sets.html', locals(),
 234             context_instance=RequestContext(request))
 235
 236
 237 @login_required
 238 @require_POST
 239 def delete_shelf(request, slug):
 240     user_set = get_object_or_404(models.Tag, slug=slug, category='set', user=request.user)
 241     user_set.delete()
 242
 243     if request.is_ajax():
 244         return HttpResponse(u'<p>Półka <strong>%s</strong> została usunięta</p>' % user_set.name)
 245     else:
 246         return HttpResponseRedirect('/')
 247
 248
 249 @login_required
 250 def user_shelves(request):
 251     shelves = models.Tag.objects.filter(category='set', user=request.user)
 252     new_set_form = forms.NewSetForm()
 253     return render_to_response('catalogue/user_shelves.html', locals(),
 254             context_instance=RequestContext(request))
 255