[Security] added SecurityContextInterface::getUser()

This changes helps the common use case of fetching the current user and better complies with the Law of Demeter (http://en.wikipedia.org/wiki/Law_of_Demeter).

Before (still works):

    $token = $context->getToken();
    $user = $token ? $token->getUser() : null;

After:

    $user = $context->getUser();

1 files changed, 9 insertions, 0 deletions

diff --git a/Core/SecurityContextInterface.php b/Core/SecurityContextInterface.php
index d0c7214..600f7b4 100644
--- a/Core/SecurityContextInterface.php
+++ b/Core/SecurityContextInterface.php
@@ -39,6 +39,15 @@ interface SecurityContextInterface
     function setToken(TokenInterface $token = null);
 
     /**
+     * Returns the current user, if one exists.
+     *
+     * @return mixed Returns either an object which implements __toString(),
+     *               or a primitive string if there is a token, otherwise
+     *               returns null.
+     */
+    function getUser();
+
+    /**
      * Checks if the attributes are granted against the current authentication token and optionally supplied object.
      *
      * @param array $attributes