[Findit] Cloud Endpoints API to receive reports on flakes.

appengine/findit/common/auth_util.py

 # Copyright 2015 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
+from google.appengine.api import oauth
+from google.appengine.api import users
 from google.appengine.api.app_identity import app_identity
 
 
 _EMAIL_SCOPE = 'https://www.googleapis.com/auth/userinfo.email'
 
 
 def GetAuthToken(scope=_EMAIL_SCOPE):  # pragma: no cover
   """Gets auth token for requests to hosts that need authorizations."""
   auth_token, _ = app_identity.get_access_token(scope)
   return auth_token
+
+
+def GetUserEmail(scope=_EMAIL_SCOPE):  # pragma: no cover
+  """Returns the email of the logged-in user or None if not logged-in."""
+  user = users.get_current_user()  # Cookie-based authentication.
+  if not user:
+    try:
+      user = oauth.get_current_user(scope)  # Oauth-based authentication.
+    except oauth.OAuthRequestError:
+      pass  # Not logged-in or invalid oauth token.
+  return user.email() if user else None
+
+
+def IsCurrentUserAdmin(scope=_EMAIL_SCOPE):  # pragma: no cover
+  """Returns True if the logged-in user is an admin."""
+  is_admin = users.is_current_user_admin()
+  try:
+    is_admin = is_admin or oauth.is_current_user_admin(scope)
+  except oauth.OAuthRequestError:
+    pass  # Not logged-in or invalid oauth token.
+  return is_admin