How to retrieve the current page from Zend_Navigation within a Controller Plugin

I am working on an Authentication Plugin using a Controller Plugin. I define my navigation config within the application.ini file, and then use that and the Database user records to dynamically load the ACL and apply it to Zend_Navigation. This bit works, as it successfully loads the menu and only displays the pages the user is allowed to see.

However, this doesn't stop the user from going to the page directly. What I want to do is identify when the user is going to a page they don't have access to within the Controlle开发者_StackOverflow中文版r Plugin so I can redirect their request to the Authentication page.

I was thinking there must be a function to retrieve the current page from Zend_Navigation, but I can't find it... so maybe it doesn't exist.

Anyway, this is my full Controller Plugin. Anyone see a solution?

<?php
class Pog_Model_AuthPlugin extends Zend_Controller_Plugin_Abstract
{
    public function preDispatch(Zend_Controller_Request_Abstract $oRequest)
    {
        /**
         * Load user
         */
        $oAuth = Zend_Auth::getInstance();
        $oDbUsers = new Pog_Model_DbTable_Users();

        if (!$oAuth->hasIdentity())
        {
            $oUser       = $oDbUsers->createRow();
            $oUser->name = "guest";
            $oUser->setReadOnly(true);
        }
        else
        {
            $oUser = $oAuth->getIdentity();
            $oUser->setTable($oDbUsers);
        }

        /**
         * Load ACL
         */    
        $oAcl = new Zend_Acl();
        $oAcl->addRole($oUser->name);


        /**
         * Add current user privileges
         */
        $oPrivileges = $oUser->getPrivileges();
        foreach ($oPrivileges as $oPrivilege)
        {
            if (!$oAcl->has($oPrivilege->resource))
                $oAcl->addResource($oPrivilege->resource);

            $oAcl->allow($oUser->name, $oPrivilege->resource, $oPrivilege->privilege);
        }


        /**
         * Load Navigation view helper
         */
        $oViewRenderer = Zend_Controller_Action_HelperBroker::getStaticHelper('ViewRenderer');
        $oNavigation   = $oViewRenderer->view->navigation();


        /**
         * Add remaining Navigation resources
         */
        foreach ($oNavigation->getPages() as $oPage)
        {
            if (!is_null($oPage->getResource()) && !$oAcl->has($oPage->getResource()))
                $oAcl->addResource($oPage->getResource());
        }


        /**
         * Set ACL and Role
         */
        $oNavigation->setAcl($oAcl)->setRole($oUser->name);


        /**
         * Check if use is allowed to be here
         */
        ...MAGIC GOES HERE...
    }
}

I think that you should be able to get current navigation page as follows:

     /**
     * Load Navigation view helper
     */
    $oViewRenderer = Zend_Controller_Action_HelperBroker::getStaticHelper('ViewRenderer');
    $oNavigation   = $oViewRenderer->view->navigation();

    /*@var $active array */        
    $active = $oNavigation->findActive($oNavigation->getContainer());

    /*@var $activePage Zend_Navigation_Page_Mvc */   
    $activePage =  $active['page'];

    // example of getting page info        
    var_dump($activePage->getLabel(), $activePage->getController(), $activePage->getAction());

Hope this helps.

This is the solution I used, since I can't get Marcin's solution working in my setup for some reason.

I did some more thinking and thought of a nice simple solution to the problem. Rather than use the Navigation module to find the Active page, I find it myself. Since I am already iterating through the pages, it's a piece of cake to compare the Controller and Action - if these both match I have my Active page!

The new getPages() foreach loop looks like this:

$oCurrentPage = null;
foreach ($oNavigation->getPages() as $oPage)
{
    /**
     * Check for Current Page
     */
    if ($oPage->getController() == $oRequest->getControllerName()
      && $oPage->getAction() == $oRequest->getActionName())
        $oCurrentPage = $oPage;


    /**
     * Add Resource, if missing
     */
    if (!is_null($oPage->getResource()) && !$oAcl->has($oPage->getResource()))
        $oAcl->addResource($oPage->getResource());
}