What is the best method in Zend Framework to provide restricted areas and redirect users to a login page? What I want to do is set a flag on my controllers for restricted pages:
class AdminController extends Zend_Controller_Action
{
protected $_isRestricted = true;
....
and have a plugin check to see if the controller is restricted and if the user has authenticated, otherwise redirect them to the login page. If I do this directly in the controller's preDispatch I can use $this->_redirect(), but looking at Action Helpers they won't have access to that. It's also a lot of duplicate code to copy/paste the authentication check code in every controller that needs it.
Do I need an Action Controller linked to preDispatch, or a Front Controller plugin? How would I do the redirect and still preserve things like the base URL?