core: add loading view for authorisation views

passbook/oauth_provider/views/oauth2.py

@@ -1,17 +1,28 @@
 """passbook OAuth2 Views"""
-
 from logging import getLogger
+from urllib.parse import urlencode
 
 from django.http import Http404
-from django.shortcuts import get_object_or_404
+from django.shortcuts import get_object_or_404, reverse
+from django.utils.translation import ugettext as _
 from oauth2_provider.views.base import AuthorizationView
 
 from passbook.core.views.access import AccessMixin
+from passbook.core.views.utils import LoadingView
 from passbook.oauth_provider.models import OAuth2Provider
 
 LOGGER = getLogger(__name__)
 
 
+class PassbookAuthorizationLoadingView(LoadingView):
+    """Show loading view for permission checks"""
+
+    title = _('Checking permissions...')
+
+    def get_url(self):
+        querystring = urlencode(self.request.GET)
+        return reverse('passbook_oauth_provider:oauth2-ok-authorize')+'?'+querystring
+
 class PassbookAuthorizationView(AccessMixin, AuthorizationView):
     """Custom OAuth2 Authorization View which checks rules, etc"""
 
@@ -31,7 +42,10 @@ class PassbookAuthorizationView(AccessMixin, AuthorizationView):
         if not self.user_has_access(self._application, request.user):
             # TODO: Create a general error class for access denied
             raise Http404
-        return super().dispatch(request, *args, **kwargs)
+        actual_response = super().dispatch(request, *args, **kwargs)
+        if actual_response.status_code == 400:
+            LOGGER.debug(request.GET.get('redirect_uri'))
+        return actual_response
 
     def render_to_response(self, context, **kwargs):
         # Always set is_login to true for correct css class