sso, translation: Help set language cookie when user logins in

This patch only ensures that response object is send along with set_language()
call. In later changes, response object can be used by set_language() to set the
language cookie.

Tests:

- Relevant functional tests pass.

- Login, user's language is set when the language is set to non-browser sent
language.

- Logout, user's language is retained when set to non-browser sent language.

- Login, user's language is set when the language is set to browser sent
language.

- Logout, user's language is retained when set to browser sent language.

Signed-off-by: Sunil Mohan Adapa <sunil@medhas.org>
Reviewed-by: James Valleroy <jvalleroy@mailbox.org>

plinth/modules/sso/views.py

@@ -13,7 +13,7 @@ from django.contrib.auth import REDIRECT_FIELD_NAME
 from django.contrib.auth.views import LoginView, LogoutView
 from django.http import HttpResponseRedirect
 
-from plinth import actions, utils, web_framework
+from plinth import actions, translation, utils, web_framework
 
 from .forms import AuthenticationForm, CaptchaAuthenticationForm
 
@@ -51,6 +51,8 @@ class SSOLoginView(LoginView):
     def dispatch(self, request, *args, **kwargs):
         response = super(SSOLoginView, self).dispatch(request, *args, **kwargs)
         if request.user.is_authenticated:
+            translation.set_language(request, response,
+                                     request.user.userprofile.language)
             return set_ticket_cookie(request.user, response)
 
         return response

plinth/translation.py

@@ -4,8 +4,6 @@ Utility methods for managing translations.
 """
 
 from django.conf import settings
-from django.contrib.auth.signals import user_logged_in
-from django.dispatch import receiver
 from django.utils import translation
 
 
@@ -58,8 +56,3 @@ def set_language(request, response, language_code):
             domain=settings.LANGUAGE_COOKIE_DOMAIN,
         )
 
-
-@receiver(user_logged_in)
-def _on_user_logged_in(sender, request, user, **kwargs):
-    """When the user logs in, set the current language."""
-    set_language(request, None, user.userprofile.language)