[ticket/13489] Disable the event dispatcher in the migrator

PHPBB3-13489

phpBB/phpbb/event/dispatcher.php

@@ -14,6 +14,7 @@
 namespace phpbb\event;
 
 use Symfony\Component\EventDispatcher\ContainerAwareEventDispatcher;
+use Symfony\Component\EventDispatcher\Event;
 
 /**
 * Extension of the Symfony2 EventDispatcher
@@ -31,6 +32,11 @@ use Symfony\Component\EventDispatcher\ContainerAwareEventDispatcher;
 */
 class dispatcher extends ContainerAwareEventDispatcher implements dispatcher_interface
 {
+	/**
+	 * @var bool
+	 */
+	protected $disabled = false;
+
 	/**
 	* {@inheritdoc}
 	*/
@@ -40,4 +46,33 @@ class dispatcher extends ContainerAwareEventDispatcher implements dispatcher_int
 		$this->dispatch($eventName, $event);
 		return $event->get_data_filtered(array_keys($data));
 	}
+
+	/**
+	 * {@inheritdoc}
+	 */
+	public function dispatch($eventName, Event $event = null)
+	{
+		if ($this->disabled)
+		{
+			return $event;
+		}
+
+		return parent::dispatch($eventName, $event);
+	}
+
+	/**
+	 * {@inheritdoc}
+	 */
+	public function disable()
+	{
+		$this->disabled = true;
+	}
+
+	/**
+	 * {@inheritdoc}
+	 */
+	public function enable()
+	{
+		$this->disabled = false;
+	}
 }