<?php
class Base_Admin extends Zend_Controller_Action {

    const ROLE_ADMIN = 'admin';
    const ROLE_USER = 'user';
    const ROLE_GUEST = 'guest';

    public function init() {
        $requestUri = $this->getRequest ()->getServer ( 'REQUEST_URI' );
        $auth = Zend_Auth::getInstance ();
        //exit($auth->getIdentity()->role);
        if (! $auth->hasIdentity ()) {
            return $this->_redirect ( '/user/login' );
        } else {
            $identity = $auth->getIdentity ();
            $role = ! empty ( $identity->role ) ? $identity->role : self::ROLE_GUEST;
            if ($role == self::ROLE_GUEST) {
                return $this->_redirect ( '/' );
            }
            if ($role == self::ROLE_USER) {
                return $this->_redirect ( '/user/index' );
            }
        }
    }
}