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         extra_where = '(NOT catalogue_tag.category = "set" OR catalogue_tag.user_id = %d)' % request.user.id
  75     else:
  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"']})
  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     try:
 101         tags = models.Tag.get_tag_list(tags)
 102     except models.Tag.DoesNotExist:
 103         raise Http404
 104
 105     model = models.Book
 106     theme_is_set = any(tag.category == 'theme' for tag in tags)
 107     if theme_is_set:
 108         model = models.Fragment
 109
 110     if request.user.is_authenticated():
 111         extra_where = '(NOT catalogue_tag.category = "set" OR catalogue_tag.user_id = %d)' % request.user.id
 112     else:
 113         extra_where = 'NOT catalogue_tag.category = "set"'
 114     related_tags = models.Tag.objects.related_for_model(tags, model, counts=True, extra={'where': [extra_where]})
 115     categories = split_tags(related_tags)
 116
 117     return newtagging_views.tagged_object_list(
 118         request,
 119         tag_model=models.Tag,
 120         queryset_or_model=model,
 121         tags=tags,
 122         template_name='catalogue/tagged_object_list.html',
 123         extra_context = {'categories': categories },
 124     )
 125
 126
 127 def book_detail(request, slug):
 128     book = get_object_or_404(models.Book, slug=slug)
 129     tags = list(book.tags.filter(~Q(category='set')))
 130     categories = split_tags(tags)
 131
 132     return render_to_response('catalogue/book_detail.html', locals(),
 133         context_instance=RequestContext(request))
 134
 135
 136 def logout_then_redirect(request):
 137     auth.logout(request)
 138     return HttpResponseRedirect(request.GET.get('next', '/'))
 139
 140
 141 @require_POST
 142 def register(request):
 143     registration_form = UserCreationForm(request.POST, prefix='registration')
 144     if registration_form.is_valid():
 145         user = registration_form.save()
 146         user = auth.authenticate(
 147             username=registration_form.cleaned_data['username'],
 148             password=registration_form.cleaned_data['password1']
 149         )
 150         auth.login(request, user)
 151         response_data = {'success': True, 'errors': {}}
 152     else:
 153         response_data = {'success': False, 'errors': registration_form.errors}
 154     return HttpResponse(LazyEncoder(ensure_ascii=False).encode(response_data))
 155
 156
 157 @require_POST
 158 def login(request):
 159     form = AuthenticationForm(data=request.POST, prefix='login')
 160     if form.is_valid():
 161         auth.login(request, form.get_user())
 162         response_data = {'success': True, 'errors': {}}
 163     else:
 164         response_data = {'success': False, 'errors': form.errors}
 165     return HttpResponse(LazyEncoder(ensure_ascii=False).encode(response_data))
 166
 167
 168 @login_required
 169 def book_sets(request, slug):
 170     book = get_object_or_404(models.Book, slug=slug)
 171     user_sets = models.Tag.objects.filter(category='set', user=request.user)
 172     book_sets = book.tags.filter(category='set', user=request.user)
 173
 174     if request.method == 'POST':
 175         form = forms.BookSetsForm(book, request.user, request.POST)
 176         if form.is_valid():
 177             book.tags = ([models.Tag.objects.get(pk=id) for id in form.cleaned_data['set_ids']] +
 178                 list(book.tags.filter(~Q(category='set') | ~Q(user=request.user))))
 179             if request.is_ajax():
 180                 return HttpResponse('<p>Zestawy zostały zapisane</p>')
 181             else:
 182                 return HttpResponseRedirect('/')
 183     else:
 184         form = forms.BookSetsForm(book, request.user)
 185         new_set_form = forms.NewSetForm()
 186
 187     return render_to_response('catalogue/book_sets.html', locals(),
 188         context_instance=RequestContext(request))
 189
 190
 191 @login_required
 192 @require_POST
 193 def new_set(request):
 194     new_set_form = forms.NewSetForm(request.POST)
 195     if new_set_form.is_valid():
 196         new_set = new_set_form.save(request.user)
 197         return HttpResponse('<p>Zestaw <strong>%s</strong> został utworzony</p>' % new_set)
 198
 199     return render_to_response('catalogue/book_sets.html', locals(),
 200             context_instance=RequestContext(request))
 201