<?php
/**
* Zend Framework (http://framework.zend.com/)
*
* @link http://github.com/zendframework/zf2 for the canonical source repository
* @copyright Copyright (c) 2005-2014 Zend Technologies USA Inc. (http://www.zend.com)
* @license http://framework.zend.com/license/new-bsd New BSD License
*/
namespace Zend\Mvc\View\Http;
use Zend\EventManager\AbstractListenerAggregate;
use Zend\EventManager\EventManagerInterface as Events;
use Zend\Mvc\MvcEvent;
use Zend\View\Model\ClearableModelInterface;
use Zend\View\Model\ModelInterface as ViewModel;
class InjectViewModelListener extends AbstractListenerAggregate
{
/**
* FilterInterface/inflector used to normalize names for use as template identifiers
*
* @var mixed
*/
protected $inflector;
/**
* {@inheritDoc}
*/
public function attach(Events $events)
{
$this->listeners[] = $events->attach(MvcEvent::EVENT_DISPATCH, array($this, 'injectViewModel'), -100);
$this->listeners[] = $events->attach(MvcEvent::EVENT_DISPATCH_ERROR, array($this, 'injectViewModel'), -100);
$this->listeners[] = $events->attach(MvcEvent::EVENT_RENDER_ERROR, array($this, 'injectViewModel'), -100);
}
/**
* Insert the view model into the event
*
* Inspects the MVC result; if it's a view model, it then either (a) adds
* it as a child to the default, composed view model, or (b) replaces it
* if the result is marked as terminable.
*
* @param MvcEvent $e
* @return void
*/
public function injectViewModel(MvcEvent $e)
{
$result = $e->getResult();
if (!$result instanceof ViewModel) {
return;
}
$model = $e->getViewModel();
if ($result->terminate()) {
$e->setViewModel($result);
return;
}
if ($e->getError() && $model instanceof ClearableModelInterface) {
$model->clearChildren();
}
$model->addChild($result);
}
}