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