core: add loading view for authorisation views

passbook/core/views/utils.py

@@ -0,0 +1,22 @@
+"""passbook core utils view"""
+
+from django.utils.translation import ugettext as _
+from django.views.generic import TemplateView
+
+
+class LoadingView(TemplateView):
+    """View showing a loading template, and forwarding to real view using html forwarding."""
+
+    template_name = 'login/loading.html'
+    title = _('Loading')
+    target_url = None
+
+    def get_url(self):
+        """Return URL template will redirect to"""
+        return self.target_url
+
+    def get_context_data(self, **kwargs):
+        kwargs['is_login'] = True
+        kwargs['title'] = self.title
+        kwargs['target_url'] = self.get_url()
+        return super().get_context_data(**kwargs)