Change suconfig to use a data model interface

endpoints/api/suconfig_models_interface.py

@@ -0,0 +1,37 @@
+from abc import ABCMeta, abstractmethod
+from six import add_metaclass
+
+@add_metaclass(ABCMeta)
+class SuperuserConfigDataInterface(object):
+  """
+  Interface that represents all data store interactions required by the superuser config API.
+  """
+  @abstractmethod
+  def is_valid(self):
+    """
+    Returns true if the configured database is valid.
+    """
+
+  @abstractmethod
+  def has_users(self):
+    """
+    Returns true if there are any users defined.
+    """
+
+  @abstractmethod
+  def create_superuser(self, username, password, email):
+    """
+    Creates a new superuser with the given username, password and email. Returns the user's UUID.
+    """
+
+  @abstractmethod
+  def has_federated_login(self, username, service_name):
+    """
+    Returns true if the matching user has a federated login under the matching service.
+    """
+
+  @abstractmethod
+  def attach_federated_login(self, username, service_name, federated_username):
+    """
+    Attaches a federatated login to the matching user, under the given service.
+    """