contrib/waldo/models.py

   1 from django import forms
   2 from django.conf.urls.defaults import url, patterns, include
   3 from django.contrib import messages
   4 from django.contrib.auth import authenticate, login, views as auth_views
   5 from django.contrib.auth.forms import PasswordResetForm, SetPasswordForm, PasswordChangeForm
   6 from django.contrib.auth.models import User
   7 from django.contrib.auth.tokens import default_token_generator as password_token_generator
   8 from django.contrib.sites.models import Site
   9 from django.core.mail import send_mail
  10 from django.core.urlresolvers import reverse
  11 from django.db import models
  12 from django.http import Http404, HttpResponseRedirect
  13 from django.shortcuts import render_to_response, get_object_or_404
  14 from django.utils.http import int_to_base36, base36_to_int
  15 from django.utils.translation import ugettext_lazy, ugettext as _
  16 from django.views.decorators.cache import never_cache
  17 from django.views.decorators.csrf import csrf_protect
  18 from philo.models import MultiView, Page
  19 from philo.contrib.waldo.forms import LOGIN_FORM_KEY, LoginForm, RegistrationForm
  20 from philo.contrib.waldo.tokens import registration_token_generator, email_token_generator
  21 import urlparse
  22
  23
  24 ERROR_MESSAGE = ugettext_lazy("Please enter a correct username and password. Note that both fields are case-sensitive.")
  25
  26
  27 def get_field_data(obj, fields):
  28         if fields == None:
  29                 fields = [field.name for field in obj._meta.fields if field.editable]
  30
  31         return dict([(field.name, field.value_from_object(obj)) for field in obj._meta.fields if field.name in fields])
  32
  33
  34 class LoginMultiView(MultiView):
  35         """
  36         Handles login, registration, and forgotten passwords. In other words, this
  37         multiview provides exclusively view and methods related to usernames and
  38         passwords.
  39         """
  40         login_page = models.ForeignKey(Page, related_name='%(app_label)s_%(class)s_login_related')
  41         password_reset_page = models.ForeignKey(Page, related_name='%(app_label)s_%(class)s_password_reset_related')
  42         password_reset_confirmation_email = models.ForeignKey(Page, related_name='%(app_label)s_%(class)s_password_reset_confirmation_email_related')
  43         password_set_page = models.ForeignKey(Page, related_name='%(app_label)s_%(class)s_password_set_related')
  44         password_change_page = models.ForeignKey(Page, related_name='%(app_label)s_%(class)s_password_change_related', blank=True, null=True)
  45         register_page = models.ForeignKey(Page, related_name='%(app_label)s_%(class)s_register_related')
  46         register_confirmation_email = models.ForeignKey(Page, related_name='%(app_label)s_%(class)s_register_confirmation_email_related')
  47
  48         @property
  49         def urlpatterns(self):
  50                 urlpatterns = patterns('',
  51                         url(r'^login/$', self.login, name='login'),
  52                         url(r'^logout/$', self.logout, name='logout'),
  53
  54                         url(r'^password/reset/$', csrf_protect(self.password_reset), name='password_reset'),
  55                         url(r'^password/reset/(?P<uidb36>\w+)/(?P<token>[^/]+)/$', self.password_reset_confirm, name='password_reset_confirm'),
  56
  57                         url(r'^register/$', csrf_protect(self.register), name='register'),
  58                         url(r'^register/(?P<uidb36>\w+)/(?P<token>[^/]+)/$', self.register_confirm, name='register_confirm')
  59                 )
  60
  61                 if self.password_change_page:
  62                         urlpatterns += patterns('',
  63                                 url(r'^password/change/$', csrf_protect(self.login_required(self.password_change)), name='password_change'),
  64                         )
  65
  66                 return urlpatterns
  67
  68         def get_context(self, extra_dict=None):
  69                 context = {}
  70                 context.update(extra_dict or {})
  71                 return context
  72
  73         def display_login_page(self, request, message, node=None, extra_context=None):
  74                 request.session.set_test_cookie()
  75
  76                 referrer = request.META.get('HTTP_REFERER', None)
  77
  78                 if referrer is not None:
  79                         referrer = urlparse.urlparse(referrer)
  80                         host = referrer[1]
  81                         if host != request.get_host():
  82                                 referrer = None
  83                         else:
  84                                 redirect = ''.join(referrer[2:])
  85
  86                 if referrer is None:
  87                         redirect = node.get_absolute_url()
  88
  89                 path = request.get_full_path()
  90                 if redirect != path:
  91                         if redirect is None:
  92                                 redirect = '/'.join(path.split('/')[:-2])
  93                         request.session['redirect'] = redirect
  94
  95                 if request.POST:
  96                         form = LoginForm(request.POST)
  97                 else:
  98                         form = LoginForm()
  99                 context = self.get_context({
 100                         'message': message,
 101                         'form': form
 102                 })
 103                 context.update(extra_context or {})
 104                 return self.login_page.render_to_response(node, request, extra_context=context)
 105
 106         def login(self, request, node=None, extra_context=None):
 107                 """
 108                 Displays the login form for the given HttpRequest.
 109                 """
 110                 context = self.get_context(extra_context)
 111
 112                 from django.contrib.auth.models import User
 113
 114                 # If this isn't already the login page, display it.
 115                 if not request.POST.has_key(LOGIN_FORM_KEY):
 116                         if request.POST:
 117                                 message = _("Please log in again, because your session has expired.")
 118                         else:
 119                                 message = ""
 120                         return self.display_login_page(request, message, node, context)
 121
 122                 # Check that the user accepts cookies.
 123                 if not request.session.test_cookie_worked():
 124                         message = _("Looks like your browser isn't configured to accept cookies. Please enable cookies, reload this page, and try again.")
 125                         return self.display_login_page(request, message, node, context)
 126                 else:
 127                         request.session.delete_test_cookie()
 128
 129                 # Check the password.
 130                 username = request.POST.get('username', None)
 131                 password = request.POST.get('password', None)
 132                 user = authenticate(username=username, password=password)
 133                 if user is None:
 134                         message = ERROR_MESSAGE
 135                         if username is not None and u'@' in username:
 136                                 # Mistakenly entered e-mail address instead of username? Look it up.
 137                                 try:
 138                                         user = User.objects.get(email=username)
 139                                 except (User.DoesNotExist, User.MultipleObjectsReturned):
 140                                         message = _("Usernames cannot contain the '@' character.")
 141                                 else:
 142                                         if user.check_password(password):
 143                                                 message = _("Your e-mail address is not your username."
 144                                                                         " Try '%s' instead.") % user.username
 145                                         else:
 146                                                 message = _("Usernames cannot contain the '@' character.")
 147                         return self.display_login_page(request, message, node, context)
 148
 149                 # The user data is correct; log in the user in and continue.
 150                 else:
 151                         if user.is_active:
 152                                 login(request, user)
 153                                 try:
 154                                         redirect = request.session.pop('redirect')
 155                                 except KeyError:
 156                                         redirect = node.get_absolute_url()
 157                                 return HttpResponseRedirect(redirect)
 158                         else:
 159                                 return self.display_login_page(request, ERROR_MESSAGE, node, context)
 160         login = never_cache(login)
 161
 162         def logout(self, request):
 163                 return auth_views.logout(request, request.META['HTTP_REFERER'])
 164
 165         def login_required(self, view):
 166                 def inner(request, node=None, *args, **kwargs):
 167                         if not request.user.is_authenticated():
 168                                 login_url = reverse('login', urlconf=self).strip('/')
 169                                 return HttpResponseRedirect('%s%s/' % (node.get_absolute_url(), login_url))
 170                         return view(request, node=node, *args, **kwargs)
 171
 172                 return inner
 173
 174         def send_confirmation_email(self, subject, email, page, extra_context):
 175                 message = page.render_to_string(extra_context=extra_context)
 176                 from_email = 'noreply@%s' % Site.objects.get_current().domain
 177                 send_mail(subject, message, from_email, [email])
 178
 179         def password_reset(self, request, node=None, extra_context=None, token_generator=password_token_generator):
 180                 if request.method == 'POST':
 181                         form = PasswordResetForm(request.POST)
 182                         if form.is_valid():
 183                                 current_site = Site.objects.get_current()
 184                                 for user in form.users_cache:
 185                                         token = token_generator.make_token(user)
 186                                         link = 'http://%s/%s/%s/' % (current_site.domain, node.get_absolute_url().strip('/'), reverse('password_reset_confirm', urlconf=self, kwargs={'uidb36': int_to_base36(user.id), 'token': token}).strip('/'))
 187                                         context = {
 188                                                 'link': link,
 189                                                 'username': user.username
 190                                         }
 191                                         self.send_confirmation_email('Confirm password reset for account at %s' % current_site.domain, user.email, self.password_reset_confirmation_email, context)
 192                                         messages.add_message(request, messages.SUCCESS, "An email has been sent to the address you provided with details on resetting your password.", fail_silently=True)
 193                                 return HttpResponseRedirect('')
 194                 else:
 195                         form = PasswordResetForm()
 196
 197                 context = self.get_context({'form': form})
 198                 context.update(extra_context or {})
 199                 return self.password_reset_page.render_to_response(node, request, extra_context=context)
 200
 201         def password_reset_confirm(self, request, node=None, extra_context=None, uidb36=None, token=None, token_generator=password_token_generator):
 202                 """
 203                 Checks that a given hash in a password reset link is valid. If so,
 204                 displays the password set form.
 205                 """
 206                 assert uidb36 is not None and token is not None
 207                 try:
 208                         uid_int = base36_to_int(uidb36)
 209                 except:
 210                         raise Http404
 211
 212                 user = get_object_or_404(User, id=uid_int)
 213
 214                 if token_generator.check_token(user, token):
 215                         if request.method == 'POST':
 216                                 form = SetPasswordForm(user, request.POST)
 217
 218                                 if form.is_valid():
 219                                         form.save()
 220                                         messages.add_message(request, messages.SUCCESS, "Password reset successful.")
 221                                         return HttpResponseRedirect('/%s/%s/' % (node.get_absolute_url().strip('/'), reverse('login', urlconf=self).strip('/')))
 222                         else:
 223                                 form = SetPasswordForm(user)
 224
 225                         context = self.get_context({'form': form})
 226                         return self.password_set_page.render_to_response(node, request, extra_context=context)
 227
 228                 raise Http404
 229
 230         def password_change(self, request, node=None, extra_context=None):
 231                 if request.method == 'POST':
 232                         form = PasswordChangeForm(request.user, request.POST)
 233                         if form.is_valid():
 234                                 form.save()
 235                                 messages.add_message(request, messages.SUCCESS, 'Password changed successfully.', fail_silently=True)
 236                                 return HttpResponseRedirect('')
 237                 else:
 238                         form = PasswordChangeForm(request.user)
 239
 240                 context = self.get_context({'form': form})
 241                 context.update(extra_context or {})
 242                 return self.password_change_page.render_to_response(node, request, extra_context=context)
 243
 244         def register(self, request, node=None, extra_context=None, token_generator=registration_token_generator):
 245                 if request.user.is_authenticated():
 246                         return HttpResponseRedirect(node.get_absolute_url())
 247
 248                 if request.method == 'POST':
 249                         form = RegistrationForm(request.POST)
 250                         if form.is_valid():
 251                                 user = form.save()
 252                                 current_site = Site.objects.get_current()
 253                                 token = token_generator.make_token(user)
 254                                 link = 'http://%s/%s/%s/' % (current_site.domain, node.get_absolute_url().strip('/'), reverse('register_confirm', urlconf=self, kwargs={'uidb36': int_to_base36(user.id), 'token': token}).strip('/'))
 255                                 context = {
 256                                         'link': link
 257                                 }
 258                                 self.send_confirmation_email('Confirm account creation at %s' % current_site.name, user.email, self.register_confirmation_email, context)
 259                                 messages.add_message(request, messages.SUCCESS, 'An email has been sent to %s with details on activating your account.' % user.email, fail_silently=True)
 260                                 return HttpResponseRedirect('')
 261                 else:
 262                         form = RegistrationForm()
 263
 264                 context = self.get_context({'form': form})
 265                 context.update(extra_context or {})
 266                 return self.register_page.render_to_response(node, request, extra_context=context)
 267
 268         def register_confirm(self, request, node=None, extra_context=None, uidb36=None, token=None, token_generator=registration_token_generator):
 269                 """
 270                 Checks that a given hash in a registration link is valid and activates
 271                 the given account. If so, log them in and redirect to
 272                 self.post_register_confirm_redirect.
 273                 """
 274                 assert uidb36 is not None and token is not None
 275                 try:
 276                         uid_int = base36_to_int(uidb36)
 277                 except:
 278                         raise Http404
 279
 280                 user = get_object_or_404(User, id=uid_int)
 281                 if token_generator.check_token(user, token):
 282                         user.is_active = True
 283                         true_password = user.password
 284                         try:
 285                                 user.set_password('temp_password')
 286                                 user.save()
 287                                 authenticated_user = authenticate(username=user.username, password='temp_password')
 288                                 login(request, authenticated_user)
 289                         finally:
 290                                 # if anything goes wrong, ABSOLUTELY make sure that the true password is restored.
 291                                 user.password = true_password
 292                                 user.save()
 293                         return self.post_register_confirm_redirect(request, node)
 294
 295                 raise Http404
 296
 297         def post_register_confirm_redirect(self, request, node):
 298                 return HttpResponseRedirect(node.get_absolute_url())
 299
 300         class Meta:
 301                 abstract = True
 302
 303
 304 class AccountMultiView(LoginMultiView):
 305         """
 306         Subclasses may define an account_profile model, fields from the User model
 307         to include in the account, and fields from the account profile to use in
 308         the account.
 309         """
 310         manage_account_page = models.ForeignKey(Page, related_name='%(app_label)s_%(class)s_manage_account_related')
 311         email_change_confirmation_email = models.ForeignKey(Page, related_name='%(app_label)s_%(class)s_email_change_confirmation_email_related')
 312         user_fields = ['first_name', 'last_name', 'email']
 313         required_user_fields = user_fields
 314         account_profile = None
 315         account_profile_fields = None
 316
 317         @property
 318         def urlpatterns(self):
 319                 urlpatterns = super(AccountMultiView, self).urlpatterns
 320                 urlpatterns += patterns('',
 321                         url(r'^account/$', self.login_required(self.account_view), name='account'),
 322                         url(r'^account/email/(?P<uidb36>\w+)/(?P<email>[\w.]+[+][\w.]+)/(?P<token>[^/]+)/$', self.email_change_confirm, name='email_change_confirm')
 323                 )
 324                 return urlpatterns
 325
 326         def get_account_forms(self):
 327                 user_form = forms.models.modelform_factory(User, fields=self.user_fields)
 328
 329                 if self.account_profile is None:
 330                         profile_form = None
 331                 else:
 332                         profile_form = forms.models.modelform_factory(self.account_profile, fields=self.account_profile_fields or [field.name for field in self.account_profile._meta.fields if field.editable and field.name != 'user'])
 333
 334                 for field_name, field in user_form.base_fields.items():
 335                         if field_name in self.required_user_fields:
 336                                 field.required = True
 337                 return user_form, profile_form
 338
 339         def get_account_form_instances(self, user, data=None):
 340                 form_instances = []
 341                 user_form, profile_form = self.get_account_forms()
 342                 if data is None:
 343                         form_instances.append(user_form(instance=user))
 344                         if profile_form:
 345                                 form_instances.append(profile_form(instance=self.account_profile._default_manager.get_or_create(user=user)[0]))
 346                 else:
 347                         form_instances.append(user_form(data, instance=user))
 348                         if profile_form:
 349                                 form_instances.append(profile_form(data, instance=self.account_profile._default_manager.get_or_create(user=user)[0]))
 350
 351                 return form_instances
 352
 353         def account_view(self, request, node=None, extra_context=None, token_generator=email_token_generator):
 354                 if request.method == 'POST':
 355                         form_instances = self.get_account_form_instances(request.user, request.POST)
 356                         current_email = request.user.email
 357
 358                         for form in form_instances:
 359                                 if not form.is_valid():
 360                                         break
 361                         else:
 362                                 # When the user_form is validated, it changes the model instance, i.e. request.user, in place.
 363                                 email = request.user.email
 364                                 if current_email != email:
 365
 366                                         request.user.email = current_email
 367
 368                                         for form in form_instances:
 369                                                 form.cleaned_data.pop('email', None)
 370
 371                                         current_site = Site.objects.get_current()
 372                                         token = token_generator.make_token(request.user, email)
 373                                         link = 'http://%s/%s/%s/' % (current_site.domain, node.get_absolute_url().strip('/'), reverse('email_change_confirm', urlconf=self, kwargs={'uidb36': int_to_base36(request.user.id), 'email': email.replace('@', '+'), 'token': token}).strip('/'))
 374                                         context = {
 375                                                 'link': link
 376                                         }
 377                                         self.send_confirmation_email('Confirm account email change at %s' % current_site.domain, email, self.email_change_confirmation_email, context)
 378                                         messages.add_message(request, messages.SUCCESS, "An email has be sent to %s to confirm the email change." % email)
 379
 380                                 for form in form_instances:
 381                                         form.save()
 382                                 messages.add_message(request, messages.SUCCESS, "Account information saved.", fail_silently=True)
 383                                 return HttpResponseRedirect('')
 384                 else:
 385                         form_instances = self.get_account_form_instances(request.user)
 386
 387                 context = self.get_context({
 388                         'forms': form_instances
 389                 })
 390                 context.update(extra_context or {})
 391                 return self.manage_account_page.render_to_response(node, request, extra_context=context)
 392
 393         def has_valid_account(self, user):
 394                 user_form, profile_form = self.get_account_forms()
 395                 forms = []
 396                 forms.append(user_form(data=get_field_data(user, self.user_fields)))
 397
 398                 if profile_form is not None:
 399                         profile = self.account_profile._default_manager.get_or_create(user=user)[0]
 400                         forms.append(profile_form(data=get_field_data(profile, self.account_profile_fields)))
 401
 402                 for form in forms:
 403                         if not form.is_valid():
 404                                 return False
 405                 return True
 406
 407         def account_required(self, view):
 408                 def inner(request, *args, **kwargs):
 409                         if not self.has_valid_account(request.user):
 410                                 messages.add_message(request, messages.ERROR, "You need to add some account information before you can post listings.", fail_silently=True)
 411                                 return self.account_view(request, *args, **kwargs)
 412                         return view(request, *args, **kwargs)
 413
 414                 inner = self.login_required(inner)
 415                 return inner
 416
 417         def post_register_confirm_redirect(self, request, node):
 418                 messages.add_message(request, messages.INFO, 'Welcome! Please fill in some more information.', fail_silently=True)
 419                 return HttpResponseRedirect('/%s/%s/' % (node.get_absolute_url().strip('/'), reverse('account', urlconf=self).strip('/')))
 420
 421         def email_change_confirm(self, request, node=None, extra_context=None, uidb36=None, token=None, email=None, token_generator=email_token_generator):
 422                 """
 423                 Checks that a given hash in an email change link is valid. If so, changes the email and redirects to the account page.
 424                 """
 425                 assert uidb36 is not None and token is not None and email is not None
 426
 427                 try:
 428                         uid_int = base36_to_int(uidb36)
 429                 except:
 430                         raise Http404
 431
 432                 user = get_object_or_404(User, id=uid_int)
 433
 434                 email = email.replace('+', '@')
 435
 436                 if email == user.email:
 437                         # Then short-circuit.
 438                         raise Http404
 439
 440                 if token_generator.check_token(user, email, token):
 441                         user.email = email
 442                         user.save()
 443                         messages.add_message(request, messages.SUCCESS, 'Email changed successfully.')
 444                         return HttpResponseRedirect('/%s/%s/' % (node.get_absolute_url().strip('/'), reverse('account', urlconf=self).strip('/')))
 445
 446                 raise Http404
 447
 448         class Meta:
 449                 abstract = True