Move auth-related from 'kfet' app to 'kfet.auth'.

kfet/auth/middleware.py

@@ -0,0 +1,29 @@
+# -*- coding: utf-8 -*-
+
+from django.contrib.auth.models import User
+
+from .backends import KFetBackend
+
+
+class KFetAuthenticationMiddleware(object):
+    """Authenticate another user for this request if KFetBackend succeeds.
+
+    By the way, if a user is authenticated, we refresh its from db to add
+    values from CofProfile and Account of this user.
+
+    """
+    def process_request(self, request):
+        if request.user.is_authenticated():
+            # avoid multiple db accesses in views and templates
+            user_pk = request.user.pk
+            request.user = (
+                User.objects
+                .select_related('profile__account_kfet')
+                .get(pk=user_pk)
+            )
+
+        kfet_backend = KFetBackend()
+        temp_request_user = kfet_backend.authenticate(request)
+        if temp_request_user:
+            request.real_user = request.user
+            request.user = temp_request_user