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 newtagging.views import tagged_object_list
  17 from catalogue import models
  18 from catalogue import forms
  19 from catalogue.utils import split_tags
  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_book_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     categories = split_tags(tags)
  79
  80     form = forms.SearchForm()
  81     return render_to_response('catalogue/main_page.html', locals(),
  82         context_instance=RequestContext(request))
  83
  84
  85 def book_list(request):
  86     books = models.Book.objects.all()
  87     form = forms.SearchForm()
  88
  89     books_by_first_letter = SortedDict()
  90     for book in books:
  91         books_by_first_letter.setdefault(book.title[0], []).append(book)
  92
  93     return render_to_response('catalogue/book_list.html', locals(),
  94         context_instance=RequestContext(request))
  95
  96
  97 def tagged_book_list(request, tags=''):
  98     try:
  99         tags = models.Tag.get_tag_list(tags)
 100     except models.Tag.DoesNotExist:
 101         raise Http404
 102
 103     if request.user.is_authenticated():
 104         extra_where = '(NOT catalogue_tag.category = "set" OR catalogue_tag.user_id = %d)' % request.user.id
 105     else:
 106         extra_where = 'NOT catalogue_tag.category = "set"'
 107     related_tags = models.Tag.objects.related_for_model(tags, models.Book, counts=True, extra={'where': [extra_where]})
 108     categories = split_tags(related_tags)
 109
 110     return tagged_object_list(
 111         request,
 112         tag_model=models.Tag,
 113         queryset_or_model=models.Book,
 114         tags=tags,
 115         template_name='catalogue/tagged_book_list.html',
 116         extra_context = {'categories': categories },
 117     )
 118
 119
 120 def book_detail(request, slug):
 121     book = get_object_or_404(models.Book, slug=slug)
 122     tags = list(book.tags.filter(~Q(category='set')))
 123     categories = split_tags(tags)
 124
 125     return render_to_response('catalogue/book_detail.html', locals(),
 126         context_instance=RequestContext(request))
 127
 128
 129 def logout_then_redirect(request):
 130     auth.logout(request)
 131     return HttpResponseRedirect(request.GET.get('next', '/'))
 132
 133
 134 @require_POST
 135 def register(request):
 136     registration_form = UserCreationForm(request.POST, prefix='registration')
 137     if registration_form.is_valid():
 138         user = registration_form.save()
 139         user = auth.authenticate(
 140             username=registration_form.cleaned_data['username'],
 141             password=registration_form.cleaned_data['password1']
 142         )
 143         auth.login(request, user)
 144         response_data = {'success': True, 'errors': {}}
 145     else:
 146         response_data = {'success': False, 'errors': registration_form.errors}
 147     return HttpResponse(LazyEncoder(ensure_ascii=False).encode(response_data))
 148
 149
 150 @require_POST
 151 def login(request):
 152     form = AuthenticationForm(data=request.POST, prefix='login')
 153     if form.is_valid():
 154         auth.login(request, form.get_user())
 155         response_data = {'success': True, 'errors': {}}
 156     else:
 157         response_data = {'success': False, 'errors': form.errors}
 158     return HttpResponse(LazyEncoder(ensure_ascii=False).encode(response_data))
 159
 160
 161 @login_required
 162 def book_sets(request, slug):
 163     book = get_object_or_404(models.Book, slug=slug)
 164     user_sets = models.Tag.objects.filter(category='set', user=request.user)
 165     book_sets = book.tags.filter(category='set', user=request.user)
 166
 167     if request.method == 'POST':
 168         form = forms.BookSetsForm(book, request.user, request.POST)
 169         if form.is_valid():
 170             book.tags = ([models.Tag.objects.get(pk=id) for id in form.cleaned_data['set_ids']] +
 171                 list(book.tags.filter(~Q(category='set') | ~Q(user=request.user))))
 172             if request.is_ajax():
 173                 return HttpResponse('<p>Zestawy zostały zapisane</p>')
 174             else:
 175                 return HttpResponseRedirect('/')
 176     else:
 177         form = forms.BookSetsForm(book, request.user)
 178         new_set_form = forms.NewSetForm()
 179
 180     return render_to_response('catalogue/book_sets.html', locals(),
 181         context_instance=RequestContext(request))
 182
 183
 184 @login_required
 185 @require_POST
 186 def new_set(request):
 187     new_set_form = forms.NewSetForm(request.POST)
 188     if new_set_form.is_valid():
 189         new_set = new_set_form.save(request.user)
 190         return HttpResponse('<p>Zestaw <strong>%s</strong> został utworzony</p>' % new_set)
 191
 192     return render_to_response('catalogue/book_sets.html', locals(),
 193             context_instance=RequestContext(request))
 194