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<?php
namespace Laminas\Mvc\Controller\Plugin;
use Laminas\Mvc\Exception\DomainException;
use Laminas\Mvc\Exception;
use Laminas\Mvc\InjectApplicationEventInterface;
use Laminas\Mvc\MvcEvent;
use Laminas\View\Model\ModelInterface as Model;
class Layout extends AbstractPlugin
{
/**
* @var MvcEvent
*/
protected $event;
/**
* Set the layout template
*
* @param string $template
* @return Layout
*/
public function setTemplate($template)
{
$viewModel = $this->getViewModel();
$viewModel->setTemplate((string) $template);
return $this;
}
/**
* Invoke as a functor
*
* If no arguments are given, grabs the "root" or "layout" view model.
* Otherwise, attempts to set the template for that view model.
*
* @param null|string $template
* @return Model|Layout
*/
public function __invoke($template = null)
{
if (null === $template) {
return $this->getViewModel();
}
return $this->setTemplate($template);
}
/**
* Get the event
*
* @return MvcEvent
* @throws Exception\DomainException if unable to find event
*/
protected function getEvent()
{
if ($this->event) {
return $this->event;
}
$controller = $this->getController();
if (! $controller instanceof InjectApplicationEventInterface) {
throw new DomainException(
'Layout plugin requires a controller that implements InjectApplicationEventInterface'
);
}
$event = $controller->getEvent();
if (! $event instanceof MvcEvent) {
$params = $event->getParams();
$event = new MvcEvent();
$event->setParams($params);
}
$this->event = $event;
return $this->event;
}
/**
* Retrieve the root view model from the event
*
* @return Model
* @throws Exception\DomainException
*/
protected function getViewModel()
{
$event = $this->getEvent();
$viewModel = $event->getViewModel();
if (! $viewModel instanceof Model) {
throw new DomainException('Layout plugin requires that event view model is populated');
}
return $viewModel;
}
}