/**
* kernel.controller listener method
*
* @param FilterControllerEvent $event
*/
public function onKernelController(FilterControllerEvent $event)
{
$this->request = $event->getRequest();
$this->matchedRoute = $this->request->get('_route');
if ($this->request->isXmlHttpRequest()) {
// this is an Ajax request we do not need to have breadcrumbs here
return;
}
if (!$this->validate()) {
return;
}
// find a matching breadcrumb node by route
$node = $this->breadcrumbTreeService->getNodeByRoute($this->matchedRoute);
if ($node) {
$routeObj = $this->router->getRouteCollection()->get($this->matchedRoute);
$compiledRoute = $routeObj->compile();
$commonParams = $this->request->get('_route_params');
$ancestorItems = array();
$ancestors = $this->breadcrumbTreeService->getPathOfNode($node, false);
foreach ($ancestors as $breadcrumbObj) {
$breadcrumbItem = array('name' => $breadcrumbObj->getLabel(), 'href' => null, 'params' => array());
// compile the route for each node
if ($routeObj = $this->router->getRouteCollection()->get($breadcrumbObj->getRoute())) {
$compiledRoute = $routeObj->compile();
// use key intersect to get the common request parameters in this current Request context and this node
$intersectedParams = \array_intersect_key($commonParams, \array_flip($compiledRoute->getVariables()));
$breadcrumbItem['params'] = $intersectedParams;
try {
$breadcrumbItem['href'] = $this->router->generate($breadcrumbObj->getRoute(), $intersectedParams);
} catch (\Exception $e) {
// do nothing here since we will only display the breadcrumb label if there is no generated link
}
}
$ancestorItems[] = $breadcrumbItem;
}
// render the template for the breadcrumbs
$breadcrumbs = $this->twig->render($this->templateName, array('currentNode' => $node, 'ancestorItems' => $ancestorItems));
} else {
$breadcrumbs = null;
}
$this->twig->addGlobal('breadcrumbs', $breadcrumbs);
}
