[feature/event-dispatcher] Change phpbb_event_dispatcher to inheritance, tests

PHPBB3-9550

phpBB/includes/event/dispatcher.php

@@ -0,0 +1,42 @@
+<?php
+/**
+*
+* @package phpBB3
+* @copyright (c) 2012 phpBB Group
+* @license http://opensource.org/licenses/gpl-2.0.php GNU General Public License v2
+*
+*/
+
+/**
+* @ignore
+*/
+if (!defined('IN_PHPBB'))
+{
+	exit;
+}
+
+use Symfony\Component\EventDispatcher\EventDispatcher;
+
+/**
+* Extension of the Symfony2 EventDispatcher
+*
+* It provides an additional `trigger_event` method, which
+* gives some syntactic sugar for dispatching events. Instead
+* of creating the event object, the method will do that for
+* you.
+*
+* Example:
+*
+*     $vars = array('page_title');
+*     extract($phpbb_dispatcher->trigger_event('core.index', compact($vars)));
+*
+*/
+class phpbb_event_dispatcher extends EventDispatcher
+{
+	public function trigger_event($eventName, $data = array())
+	{
+		$event = new phpbb_event_data($data);
+		$this->dispatch($eventName, $event);
+		return $event->get_data_filtered(array_keys($data));
+	}
+}