Zend_Navigation add class to active link

Question

How can I add a class to the active navigation link? If a link points to URI /index/index and the request URI is also /index/index, I would like the link to have class, for example:

<li class="active">
    <a href="/index/index">Index</a>
</li>

This is how I am initializing navigation in the bootstrap:

protected function _initNavigation()
{
$navigation = new Zend_Navigation($this->getOption('navigation'));
$this->view->navigation($navigation);
}

Answer 1

Ok,

I have solved this by writing a controller plugin:

<?php
class My_Controller_Plugin_PrepareNavigation extends Zend_Controller_Plugin_Abstract
{
    public function routeShutdown(Zend_Controller_Request_Abstract $request)
    {
        $viewRenderer = Zend_Controller_Action_HelperBroker::getExistingHelper('ViewRenderer');
        $viewRenderer->initView();
        $view = $viewRenderer->view;

        $container = new Zend_Navigation(Zend_Registry::get('configuration')->navigation);
        foreach ($container->getPages() as $page) {
            $uri = $page->getHref();
            if ($uri === $request->getRequestUri()) {
                $page->setClass('active');
            }
        }
        $view->navigation($container);
    }
}