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[osqa.git] / forum / views / auth.py
1 # -*- coding: utf-8 -*-
2
3 import datetime
4 import logging
5 import urllib
6 from urlparse import urlparse
7
8 from django.shortcuts import render_to_response, get_object_or_404
9 from django.template import RequestContext
10 from django.core.urlresolvers import reverse
11 from django.http import HttpResponseRedirect, Http404
12 from django.utils.safestring import mark_safe
13 from django.utils.translation import ugettext as _
14 from django.utils.encoding import smart_unicode
15 from django.contrib.auth import login, logout
16
17 from django.contrib import messages
18
19 from writers import manage_pending_data
20
21 from forum.actions import EmailValidationAction
22 from forum.utils import html
23 from forum.views.decorators import login_required
24 from forum.modules import decorate
25 from forum.forms import SimpleRegistrationForm, TemporaryLoginRequestForm, ChangePasswordForm, SetPasswordForm
26 from forum.http_responses import HttpResponseUnauthorized
27 from forum.utils.mail import send_template_email
28 from forum.authentication.base import InvalidAuthentication
29 from forum.authentication import AUTH_PROVIDERS
30 from forum.models import User, AuthKeyUserAssociation, ValidationHash
31 from forum.actions import UserJoinsAction, UserLoginAction
32 from forum import settings
33
34 from vars import ON_SIGNIN_SESSION_ATTR, PENDING_SUBMISSION_SESSION_ATTR
35
36 def signin_page(request):
37     referer = request.META.get('HTTP_REFERER', '/')
38
39     # If the referer is equal to the sign up page, e. g. if the previous login attempt was not successful we do not
40     # change the sign in URL. The user should go to the same page.
41     if not referer.replace(settings.APP_URL, '') == reverse('auth_signin'):
42         request.session[ON_SIGNIN_SESSION_ATTR] = referer
43
44     all_providers = [provider.context for provider in AUTH_PROVIDERS.values() if provider.context]
45
46     sort = lambda c1, c2: c1.weight - c2.weight
47     can_show = lambda c: not request.user.is_authenticated() or c.show_to_logged_in_user
48
49     bigicon_providers = sorted([
50     context for context in all_providers if context.mode == 'BIGICON' and can_show(context)
51     ], sort)
52
53     smallicon_providers = sorted([
54     context for context in all_providers if context.mode == 'SMALLICON' and can_show(context)
55     ], sort)
56
57     top_stackitem_providers = sorted([
58     context for context in all_providers if context.mode == 'TOP_STACK_ITEM' and can_show(context)
59     ], sort)
60
61     stackitem_providers = sorted([
62     context for context in all_providers if context.mode == 'STACK_ITEM' and can_show(context)
63     ], sort)
64
65     try:
66         msg = request.session['auth_error']
67         del request.session['auth_error']
68     except:
69         msg = None
70
71     return render_to_response(
72             'auth/signin.html',
73             {
74             'msg': msg,
75             'all_providers': all_providers,
76             'bigicon_providers': bigicon_providers,
77             'top_stackitem_providers': top_stackitem_providers,
78             'stackitem_providers': stackitem_providers,
79             'smallicon_providers': smallicon_providers,
80             },
81             RequestContext(request))
82
83 def prepare_provider_signin(request, provider):
84     force_email_request = request.REQUEST.get('validate_email', 'yes') == 'yes'
85     request.session['force_email_request'] = force_email_request
86
87     if provider in AUTH_PROVIDERS:
88         provider_class = AUTH_PROVIDERS[provider].consumer
89
90         try:
91             request_url = provider_class.prepare_authentication_request(request,
92                                                                         reverse('auth_provider_done',
93                                                                                 kwargs={'provider': provider}))
94
95             return HttpResponseRedirect(request_url)
96         except NotImplementedError, e:
97             return process_provider_signin(request, provider)
98         except InvalidAuthentication, e:
99             request.session['auth_error'] = e.message
100
101         return HttpResponseRedirect(reverse('auth_signin'))
102     else:
103         raise Http404()
104
105
106 def process_provider_signin(request, provider):
107     if provider in AUTH_PROVIDERS:
108         provider_class = AUTH_PROVIDERS[provider].consumer
109
110         try:
111             assoc_key = provider_class.process_authentication_request(request)
112         except InvalidAuthentication, e:
113             request.session['auth_error'] = e.message
114             return HttpResponseRedirect(reverse('auth_signin'))
115
116         if request.user.is_authenticated():
117             if isinstance(assoc_key, (type, User)):
118                 if request.user != assoc_key:
119                     request.session['auth_error'] = _(
120                             "Sorry, these login credentials belong to anoother user. Plese terminate your current session and try again."
121                             )
122                 else:
123                     request.session['auth_error'] = _("You are already logged in with that user.")
124             else:
125                 try:
126                     assoc = AuthKeyUserAssociation.objects.get(key=assoc_key)
127                     if assoc.user == request.user:
128                         request.session['auth_error'] = _(
129                                 "These login credentials are already associated with your account.")
130                     else:
131                         request.session['auth_error'] = _(
132                                 "Sorry, these login credentials belong to anoother user. Plese terminate your current session and try again."
133                                 )
134                 except:
135                     uassoc = AuthKeyUserAssociation(user=request.user, key=assoc_key, provider=provider)
136                     uassoc.save()
137                     messages.info(request, _('The new credentials are now associated with your account'))
138                     return HttpResponseRedirect(reverse('user_authsettings', args=[request.user.id]))
139
140             return HttpResponseRedirect(reverse('auth_signin'))
141         else:
142             if isinstance(assoc_key, User):
143                 return login_and_forward(request, assoc_key)
144
145         try:
146             assoc = AuthKeyUserAssociation.objects.get(key=assoc_key)
147             user_ = assoc.user
148             return login_and_forward(request, user_)
149         except AuthKeyUserAssociation.DoesNotExist:
150             request.session['assoc_key'] = assoc_key
151             request.session['auth_provider'] = provider
152             return HttpResponseRedirect(reverse('auth_external_register'))
153
154     return HttpResponseRedirect(reverse('auth_signin'))
155
156 def external_register(request):
157     if request.method == 'POST' and 'bnewaccount' in request.POST:
158         form1 = SimpleRegistrationForm(request.POST)
159
160         if form1.is_valid():
161             user_ = User(username=form1.cleaned_data['username'], email=form1.cleaned_data['email'], real_name=form1.cleaned_data['real_name'])
162             user_.email_isvalid = request.session.get('auth_validated_email', '') == form1.cleaned_data['email']
163             user_.set_unusable_password()
164
165             if User.objects.all().count() == 0:
166                 user_.is_superuser = True
167                 user_.is_staff = True
168
169             user_.save()
170             UserJoinsAction(user=user_, ip=request.META['REMOTE_ADDR']).save()
171
172             try:
173                 assoc_key = request.session['assoc_key']
174                 auth_provider = request.session['auth_provider']
175             except:
176                 request.session['auth_error'] = _(
177                         "Oops, something went wrong in the middle of this process. Please try again. Note that you need to have cookies enabled for the authentication to work."
178                         )
179                 logging.error("Missing session data when trying to complete user registration: %s" % ", ".join(
180                         ["%s: %s" % (k, v) for k, v in request.META.items()]))
181                 return HttpResponseRedirect(reverse('auth_signin'))
182
183             uassoc = AuthKeyUserAssociation(user=user_, key=assoc_key, provider=auth_provider)
184             uassoc.save()
185
186             del request.session['assoc_key']
187             del request.session['auth_provider']
188
189             return login_and_forward(request, user_, message=_("A welcome email has been sent to your email address. "))
190     else:
191         auth_provider = request.session.get('auth_provider', None)
192         if not auth_provider:
193             request.session['auth_error'] = _(
194                     "Oops, something went wrong in the middle of this process. Please try again.")
195             logging.error("Missing session data when trying to complete user registration: %s" % ", ".join(
196                     ["%s: %s" % (k, v) for k, v in request.META.items()]))
197             return HttpResponseRedirect(reverse('auth_signin'))
198
199         provider_class = AUTH_PROVIDERS[auth_provider].consumer
200
201         if provider_class.__class__.__name__ == 'FacebookAuthConsumer':
202             user_data = provider_class.get_user_data(request.session['access_token'])
203         else:
204             user_data = provider_class.get_user_data(request.session['assoc_key'])
205
206
207         if not user_data:
208             user_data = request.session.get('auth_consumer_data', {})
209
210         username = user_data.get('username', '')
211         email = user_data.get('email', '')
212         real_name = user_data.get('real_name', '')
213
214         if email:
215             request.session['auth_validated_email'] = email
216
217         form1 = SimpleRegistrationForm(initial={
218         'next': '/',
219         'username': username,
220         'email': email,
221         'real_name': real_name,
222         })
223
224     provider_context = AUTH_PROVIDERS[request.session['auth_provider']].context
225
226     return render_to_response('auth/complete.html', {
227     'form1': form1,
228     'provider':provider_context and mark_safe(provider_context.human_name) or _('unknown'),
229     'login_type':provider_context.id,
230     'gravatar_faq_url':reverse('faq') + '#gravatar',
231     }, context_instance=RequestContext(request))
232
233 def request_temp_login(request):
234     if request.method == 'POST':
235         form = TemporaryLoginRequestForm(request.POST)
236
237         if form.is_valid():
238             users = form.user_cache
239
240             for u in users:
241                 if u.is_suspended():
242                     return forward_suspended_user(request, u, False)
243
244             for u in users:
245                 try:
246                     hash = get_object_or_404(ValidationHash, user=u, type='templogin')
247                     if hash.expiration < datetime.datetime.now():
248                         hash.delete()
249                         return request_temp_login(request)
250                 except:
251                     hash = ValidationHash.objects.create_new(u, 'templogin', [u.id])
252
253                 send_template_email([u], "auth/temp_login_email.html", {'temp_login_code': hash})
254
255                 messages.info(request, _("An email has been sent with your temporary login key"))
256
257             return HttpResponseRedirect(reverse('index'))
258     else:
259         form = TemporaryLoginRequestForm()
260
261     return render_to_response(
262             'auth/temp_login_request.html', {'form': form},
263             context_instance=RequestContext(request))
264
265 def temp_signin(request, user, code):
266     user = get_object_or_404(User, id=user)
267
268     if (ValidationHash.objects.validate(code, user, 'templogin', [user.id])):
269         
270         # If the user requests temp_signin he must have forgotten his password. So we mark it as unusable.
271         user.set_unusable_password()
272         user.save()
273         
274         return login_and_forward(request, user, reverse('user_authsettings', kwargs={'id': user.id}),
275                                  _(
276                                          "You are logged in with a temporary access key, please take the time to fix your issue with authentication."
277                                          ))
278     else:
279         raise Http404()
280
281 def send_validation_email(request):
282     if not request.user.is_authenticated():
283         return HttpResponseUnauthorized(request)
284     else:
285         # We check if there are some old validation hashes. If there are -- we delete them.
286         try:
287             hash = ValidationHash.objects.get(user=request.user, type='email')
288             hash.delete()
289         except:
290             pass
291
292         # We don't care if there are previous cashes in the database... In every case we have to create a new one
293         hash = ValidationHash.objects.create_new(request.user, 'email', [request.user.email])
294
295         additional_get_params = urllib.urlencode(dict([k, v.encode('utf-8')] for k, v in request.GET.items()))
296         send_template_email([request.user], "auth/mail_validation.html", {
297             'validation_code': hash,
298             'additional_get_params' : additional_get_params
299         })
300
301         messages.info(request, _("A message with an email validation link was just sent to your address."))
302         return HttpResponseRedirect(request.META.get('HTTP_REFERER', '/'))
303
304         
305
306 def validate_email(request, user, code):
307     user = get_object_or_404(User, id=user)
308
309     if (ValidationHash.objects.validate(code, user, 'email', [user.email])):
310         EmailValidationAction(user=user, ip=request.META['REMOTE_ADDR']).save()
311         return login_and_forward(request, user, reverse('index'), _("Thank you, your email is now validated."))
312     else:
313         return render_to_response('auth/mail_already_validated.html', { 'user' : user }, RequestContext(request))
314
315 def auth_settings(request, id):
316     user_ = get_object_or_404(User, id=id)
317
318     if not (request.user.is_superuser or request.user == user_):
319         return HttpResponseUnauthorized(request)
320
321     auth_keys = user_.auth_keys.all()
322
323     if request.user.is_superuser or (not user_.has_usable_password()):
324         FormClass = SetPasswordForm
325     else:
326         FormClass = ChangePasswordForm
327
328     if request.POST:
329         form = FormClass(request.POST, user=user_)
330         if form.is_valid():
331             is_new_pass = not user_.has_usable_password()
332             user_.set_password(form.cleaned_data['password1'])
333             user_.save()
334
335             if is_new_pass:
336                 messages.info(request, _("New password set"))
337                 if not request.user.is_superuser:
338                     form = ChangePasswordForm(user=user_)
339             else:
340                 messages.info(request, _("Your password was changed"))
341
342             return HttpResponseRedirect(reverse('user_authsettings', kwargs={'id': user_.id}))
343     else:
344         form = FormClass(user=user_)
345
346     auth_keys_list = []
347
348     for k in auth_keys:
349         provider = AUTH_PROVIDERS.get(k.provider, None)
350
351         if provider is not None:
352             name =  "%s: %s" % (provider.context.human_name, provider.context.readable_key(k))
353         else:
354             from forum.authentication.base import ConsumerTemplateContext
355             "unknown: %s" % ConsumerTemplateContext.readable_key(k)
356
357         auth_keys_list.append({
358         'name': name,
359         'id': k.id
360         })
361
362     return render_to_response('auth/auth_settings.html', {
363     'view_user': user_,
364     "can_view_private": (user_ == request.user) or request.user.is_superuser,
365     'form': form,
366     'has_password': user_.has_usable_password(),
367     'auth_keys': auth_keys_list,
368     'allow_local_auth': AUTH_PROVIDERS.get('local', None),
369     }, context_instance=RequestContext(request))
370
371 def remove_external_provider(request, id):
372     association = get_object_or_404(AuthKeyUserAssociation, id=id)
373     if not (request.user.is_superuser or request.user == association.user):
374         return HttpResponseUnauthorized(request)
375
376     messages.info(request, _("You removed the association with %s") % association.provider)
377     association.delete()
378     return HttpResponseRedirect(reverse('user_authsettings', kwargs={'id': association.user.id}))
379
380 def login_and_forward(request, user, forward=None, message=None):
381     if user.is_suspended():
382         return forward_suspended_user(request, user)
383
384     user.backend = "django.contrib.auth.backends.ModelBackend"
385     login(request, user)
386
387     # Store the login action
388     UserLoginAction(user=user, ip=request.META['REMOTE_ADDR']).save()
389
390     if message is None:
391         message = _("Welcome back %s, you are now logged in") % smart_unicode(user.username)
392
393     messages.info(request, message)
394
395     if not forward:
396         forward = request.session.get(ON_SIGNIN_SESSION_ATTR, reverse('index'))
397
398     pending_data = request.session.get(PENDING_SUBMISSION_SESSION_ATTR, None)
399
400     if pending_data and (user.email_isvalid or pending_data['type'] not in settings.REQUIRE_EMAIL_VALIDATION_TO):
401         submission_time = pending_data['time']
402         if submission_time < datetime.datetime.now() - datetime.timedelta(minutes=int(settings.HOLD_PENDING_POSTS_MINUTES)):
403             del request.session[PENDING_SUBMISSION_SESSION_ATTR]
404         elif submission_time < datetime.datetime.now() - datetime.timedelta(minutes=int(settings.WARN_PENDING_POSTS_MINUTES)):
405             messages.info(request, (_("You have a %s pending submission.") % pending_data['data_name']) + " %s, %s, %s" % (
406                 html.hyperlink(reverse('manage_pending_data', kwargs={'action': _('save')}), _("save it")),
407                 html.hyperlink(reverse('manage_pending_data', kwargs={'action': _('review')}), _("review")),
408                 html.hyperlink(reverse('manage_pending_data', kwargs={'action': _('cancel')}), _("cancel"))
409             ))
410         else:
411             return manage_pending_data(request, _('save'), forward)
412
413     additional_get_params = urllib.urlencode(dict([k, v.encode('utf-8')] for k, v in request.GET.items()))
414
415     parsed_forward = urlparse(forward)
416
417     # If there is already some parsed query in the URL then change the forward URL
418     if parsed_forward.query:
419         forward_url = forward + "&%s" % additional_get_params
420     else:
421         forward_url = forward + "?%s" % additional_get_params
422
423     return HttpResponseRedirect(forward_url)
424
425 def forward_suspended_user(request, user, show_private_msg=True):
426     message = _("Sorry, but this account is suspended")
427     if show_private_msg:
428         msg_type = 'privatemsg'
429     else:
430         msg_type = 'publicmsg'
431
432     suspension = user.suspension
433     if suspension:
434         message += (":<br />" + suspension.extra.get(msg_type, ''))
435
436     messages.info(request, message)
437     return HttpResponseRedirect(reverse('index'))
438
439 @decorate.withfn(login_required)
440 def signout(request):
441     logout(request)
442     return HttpResponseRedirect(reverse('index'))