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|
<?php
namespace SMW;
use Onoi\EventDispatcher\EventDispatcher;
use Onoi\EventDispatcher\EventDispatcherFactory;
/**
* @license GNU GPL v2+
* @since 2.2
*
* @author mwjames
*/
class EventHandler {
/**
* @var EventHandler
*/
private static $instance = null;
/**
* @var EventDispatcher
*/
private $eventDispatcher = null;
/**
* @since 2.2
*
* @param EventDispatcher $eventDispatcher
*/
public function __construct( EventDispatcher $eventDispatcher ) {
$this->eventDispatcher = $eventDispatcher;
}
/**
* @since 2.2
*
* @return self
*/
public static function getInstance() {
if ( self::$instance === null ) {
self::$instance = new self( self::newEventDispatcher() );
}
return self::$instance;
}
/**
* @since 2.2
*/
public static function clear() {
self::$instance = null;
}
/**
* @since 2.2
*
* @return EventDispatcher
*/
public function getEventDispatcher() {
return $this->eventDispatcher;
}
/**
* @since 2.2
*
* @return DispatchContext
*/
public function newDispatchContext() {
return EventDispatcherFactory::getInstance()->newDispatchContext();
}
/**
* @since 2.3
*
* @param string $event
* @param Closure $callback
*/
public function addCallbackListener( $event, \Closure $callback ) {
$listener = EventDispatcherFactory::getInstance()->newGenericCallbackEventListener();
$listener->registerCallback( $callback );
$this->getEventDispatcher()->addListener(
$event,
$listener
);
}
private static function newEventDispatcher() {
$eventListenerRegistry = new EventListenerRegistry(
EventDispatcherFactory::getInstance()->newGenericEventListenerCollection()
);
$eventDispatcher = EventDispatcherFactory::getInstance()->newGenericEventDispatcher();
$eventDispatcher->addListenerCollection( $eventListenerRegistry );
return $eventDispatcher;
}
}
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