3 files changed, 156 insertions, 0 deletions
diff --git a/phpBB/includes/event/data.php b/phpBB/includes/event/data.php
new file mode 100644
index 0000000000..70718ff0ae
--- /dev/null
+++ b/phpBB/includes/event/data.php
@@ -0,0 +1,68 @@
+<?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\Event;
+
+class phpbb_event_data extends Event implements ArrayAccess
+{
+    private $data;
+
+    public function __construct(array $data = array())
+    {
+        $this->set_data($data);
+    }
+
+    public function set_data(array $data = array())
+    {
+        $this->data = $data;
+    }
+
+    public function get_data()
+    {
+        return $this->data;
+    }
+
+    /**
+     * Returns data filtered to only include specified keys.
+     *
+     * This effectively discards any keys added to data by hooks.
+     */
+    public function get_data_filtered($keys)
+    {
+        return array_intersect_key($this->data, array_flip($keys));
+    }
+
+    public function offsetExists($offset)
+    {
+        return isset($this->data[$offset]);
+    }
+
+    public function offsetGet($offset)
+    {
+        return isset($this->data[$offset]) ? $this->data[$offset] : null;
+    }
+
+    public function offsetSet($offset, $value)
+    {
+        $this->data[$offset] = $value;
+    }
+
+    public function offsetUnset($offset)
+    {
+        unset($this->data[$offset]);
+    }
+}
diff --git a/phpBB/includes/event/dispatcher.php b/phpBB/includes/event/dispatcher.php
new file mode 100644
index 0000000000..2bf46b9b06
--- /dev/null
+++ b/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));
+	}
+}
diff --git a/phpBB/includes/event/extension_subscriber_loader.php b/phpBB/includes/event/extension_subscriber_loader.php
new file mode 100644
index 0000000000..d933b943d7
--- /dev/null
+++ b/phpBB/includes/event/extension_subscriber_loader.php
@@ -0,0 +1,46 @@
+<?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\EventDispatcherInterface;
+
+class phpbb_event_extension_subscriber_loader
+{
+	private $dispatcher;
+	private $extension_manager;
+
+	public function __construct(EventDispatcherInterface $dispatcher, phpbb_extension_manager $extension_manager)
+	{
+		$this->dispatcher = $dispatcher;
+		$this->extension_manager = $extension_manager;
+	}
+
+	public function load()
+	{
+		$finder = $this->extension_manager->get_finder();
+		$subscriber_classes = $finder
+			->extension_directory('/event')
+			->suffix('listener')
+			->core_path('event/')
+			->get_classes();
+
+		foreach ($subscriber_classes as $class)
+		{
+			$subscriber = new $class();
+			$this->dispatcher->addSubscriber($subscriber);
+		}
+	}
+}