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_GET, 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 class LazyEncoder(simplejson.JSONEncoder):
  17     def default(self, obj):
  18         if isinstance(obj, Promise):
  19             return force_unicode(obj)
  20         return obj
  21
  22
  23 from catalogue import models
  24 from catalogue import forms
  25 from catalogue.utils import split_tags
  26
  27
  28 def catalogue_redirect(request, tags=''):
  29     if len(request.GET['q']) > 0:
  30         try:
  31             tag = models.Tag.objects.get(name=request.GET['q'])
  32             if len(tags):
  33                 tags += '/'
  34             tags = tags + tag.slug
  35         except models.Tag.DoesNotExist:
  36             book = get_object_or_404(models.Book, title=request.GET['q'])
  37             return HttpResponseRedirect(book.get_absolute_url())
  38     if len(tags) > 0:
  39         return HttpResponseRedirect(reverse('catalogue.views.tagged_book_list', kwargs=dict(tags=tags)))
  40     else:
  41         return HttpResponseRedirect(reverse('catalogue.views.main_page'))
  42
  43
  44 def tags_starting_with(request):
  45     try:
  46         prefix = request.GET['q']
  47         if len(prefix) < 2:
  48             raise KeyError
  49
  50         books = models.Book.objects.filter(title__icontains=prefix)
  51         tags = models.Tag.objects.filter(name__icontains=prefix)
  52         if request.user.is_authenticated():
  53             tags = tags.filter(~Q(category='set') | Q(user=request.user))
  54         else:
  55             tags = tags.filter(~Q(category='set'))
  56
  57         completions = [book.title for book in books] + [tag.name for tag in tags]
  58
  59         return HttpResponse('\n'.join(completions))
  60
  61     except KeyError:
  62         return HttpResponse('')
  63
  64
  65 def main_page(request):
  66     if 'q' in request.GET:
  67         return catalogue_redirect(request)
  68
  69     if request.user.is_authenticated():
  70         extra_where = '(NOT catalogue_tag.category = "set" OR catalogue_tag.user_id = %d)' % request.user.id
  71     else:
  72         extra_where = 'NOT catalogue_tag.category = "set"'
  73     tags = models.Tag.objects.usage_for_model(models.Book, counts=True, extra={'where': [extra_where]})
  74     categories = split_tags(tags)
  75
  76     form = forms.SearchForm()
  77     return render_to_response('catalogue/main_page.html', locals(),
  78         context_instance=RequestContext(request))
  79
  80
  81 def book_list(request):
  82     if 'q' in request.GET:
  83         return catalogue_redirect(request)
  84
  85     books = models.Book.objects.all()
  86     form = forms.SearchForm()
  87
  88     books_by_first_letter = SortedDict()
  89     for book in books:
  90         books_by_first_letter.setdefault(book.title[0], []).append(book)
  91
  92     return render_to_response('catalogue/book_list.html', locals(),
  93         context_instance=RequestContext(request))
  94
  95
  96 def tagged_book_list(request, tags=''):
  97     if 'q' in request.GET:
  98         return catalogue_redirect(request, tags)
  99
 100     choices_split = tags.split('/')
 101     tags = []
 102     for tag in choices_split:
 103         tag = get_object_or_404(models.Tag, slug=tag)
 104         if tag.category == 'set' and (not request.user.is_authenticated() or request.user != tag.user):
 105             raise Http404
 106         tags.append(tag)
 107
 108     books = models.Book.objects.with_all(tags)
 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, models.Book, counts=True, extra={'where': [extra_where]})
 115     categories = split_tags(related_tags)
 116
 117     form = forms.SearchForm()
 118
 119     return render_to_response('catalogue/tagged_book_list.html', dict(
 120         tags=tags,
 121         form=form,
 122         books=books,
 123         categories=categories,
 124     ), context_instance=RequestContext(request))
 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     search_form = forms.SearchForm()
 132
 133     return render_to_response('catalogue/book_detail.html', locals(),
 134         context_instance=RequestContext(request))
 135
 136
 137 def logout_then_redirect(request):
 138     auth.logout(request)
 139     return HttpResponseRedirect(request.GET.get('next', '/'))
 140
 141
 142 @require_POST
 143 def register(request):
 144     registration_form = UserCreationForm(request.POST, prefix='registration')
 145     if registration_form.is_valid():
 146         user = registration_form.save()
 147         user = auth.authenticate(
 148             username=registration_form.cleaned_data['username'],
 149             password=registration_form.cleaned_data['password1']
 150         )
 151         auth.login(request, user)
 152         response_data = {'success': True, 'errors': {}}
 153     else:
 154         response_data = {'success': False, 'errors': registration_form.errors}
 155     return HttpResponse(LazyEncoder(ensure_ascii=False).encode(response_data))
 156
 157
 158 @require_POST
 159 def login(request):
 160     form = AuthenticationForm(data=request.POST, prefix='login')
 161     if form.is_valid():
 162         auth.login(request, form.get_user())
 163         response_data = {'success': True, 'errors': {}}
 164     else:
 165         response_data = {'success': False, 'errors': form.errors}
 166     return HttpResponse(LazyEncoder(ensure_ascii=False).encode(response_data))
 167
 168
 169 @login_required
 170 def book_sets(request, slug):
 171     book = get_object_or_404(models.Book, slug=slug)
 172     user_sets = models.Tag.objects.filter(category='set', user=request.user)
 173     book_sets = book.tags.filter(category='set', user=request.user)
 174
 175     if request.method == 'POST':
 176         form = forms.BookSetsForm(book, request.user, request.POST)
 177         if form.is_valid():
 178             book.tags = ([models.Tag.objects.get(pk=id) for id in form.cleaned_data['set_ids']] +
 179                 list(book.tags.filter(~Q(category='set') | ~Q(user=request.user))))
 180             if request.is_ajax():
 181                 return HttpResponse('<p>Zestawy zostały zapisane</p>')
 182             else:
 183                 return HttpResponseRedirect('/')
 184     else:
 185         form = forms.BookSetsForm(book, request.user)
 186         new_set_form = forms.NewSetForm()
 187
 188     return render_to_response('catalogue/book_sets.html', locals(),
 189         context_instance=RequestContext(request))
 190
 191
 192 @login_required
 193 @require_POST
 194 def new_set(request):
 195     new_set_form = forms.NewSetForm(request.POST)
 196     if new_set_form.is_valid():
 197         new_set = new_set_form.save(request.user)
 198         return HttpResponse('<p>Zestaw <strong>%s</strong> został utworzony</p>' % new_set)
 199
 200     return render_to_response('catalogue/book_sets.html', locals(),
 201             context_instance=RequestContext(request))
 202