1 files changed, 97 insertions, 0 deletions
diff --git a/public/system/engine/event.php b/public/system/engine/event.php
new file mode 100644
index 0000000..d4f92ec
--- /dev/null
+++ b/public/system/engine/event.php
@@ -0,0 +1,97 @@
+<?php
+/**
+ * @package		OpenCart
+ * @author		Daniel Kerr
+ * @copyright	Copyright (c) 2005 - 2017, OpenCart, Ltd. (https://www.opencart.com/)
+ * @license		https://opensource.org/licenses/GPL-3.0
+ * @link		https://www.opencart.com
+*/
+
+/**
+* Event class
+*
+* Event System Userguide
+* 
+* https://github.com/opencart/opencart/wiki/Events-(script-notifications)-2.2.x.x
+*/
+class Event {
+	protected $registry;
+	protected $data = array();
+	
+	/**
+	 * Constructor
+	 *
+	 * @param	object	$route
+ 	*/
+	public function __construct($registry) {
+		$this->registry = $registry;
+	}
+	
+	/**
+	 * 
+	 *
+	 * @param	string	$trigger
+	 * @param	object	$action
+	 * @param	int		$priority
+ 	*/	
+	public function register($trigger, Action $action, $priority = 0) {
+		$this->data[] = array(
+			'trigger'  => $trigger,
+			'action'   => $action,
+			'priority' => $priority
+		);
+		
+		$sort_order = array();
+
+		foreach ($this->data as $key => $value) {
+			$sort_order[$key] = $value['priority'];
+		}
+
+		array_multisort($sort_order, SORT_ASC, $this->data);	
+	}
+	
+	/**
+	 * 
+	 *
+	 * @param	string	$event
+	 * @param	array	$args
+ 	*/		
+	public function trigger($event, array $args = array()) {
+		foreach ($this->data as $value) {
+			if (preg_match('/^' . str_replace(array('\*', '\?'), array('.*', '.'), preg_quote($value['trigger'], '/')) . '/', $event)) {
+				$result = $value['action']->execute($this->registry, $args);
+
+				if (!is_null($result) && !($result instanceof Exception)) {
+					return $result;
+				}
+			}
+		}
+	}
+	
+	/**
+	 * 
+	 *
+	 * @param	string	$trigger
+	 * @param	string	$route
+ 	*/	
+	public function unregister($trigger, $route) {
+		foreach ($this->data as $key => $value) {
+			if ($trigger == $value['trigger'] && $value['action']->getId() == $route) {
+				unset($this->data[$key]);
+			}
+		}			
+	}
+	
+	/**
+	 * 
+	 *
+	 * @param	string	$trigger
+ 	*/		
+	public function clear($trigger) {
+		foreach ($this->data as $key => $value) {
+			if ($trigger == $value['trigger']) {
+				unset($this->data[$key]);
+			}
+		}
+	}	
+}
+\ No newline at end of file