functions.inc.php

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<?php
function getUser(){
        static $user =-1;
        if (is_int($user) and $user == -1 ){
                $user = Dataface_AuthenticationTool::getInstance()->getLoggedInUser();
        }
        return $user;

}

function getRole(){
        static $role = -1;
        if ( is_int($role) and $role == -1 ){
                $user = getUser();
                if ( !$user ) return null;
                $role = $user->val('role');
        }
        return $role;
}

function isAdmin(){
        return (getRole() == 'ADMIN');
}