first commit

public/system/engine/router.php

@@ -0,0 +1,81 @@
+<?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
+*/
+
+/**
+* Router class
+*/
+final class Router {
+	private $registry;
+	private $pre_action = array();
+	private $error;
+	
+	/**
+	 * Constructor
+	 *
+	 * @param	object	$route
+ 	*/
+	public function __construct($registry) {
+		$this->registry = $registry;
+	}
+	
+	/**
+	 * 
+	 *
+	 * @param	object	$pre_action
+ 	*/	
+	public function addPreAction(Action $pre_action) {
+		$this->pre_action[] = $pre_action;
+	}
+
+	/**
+	 * 
+	 *
+	 * @param	object	$action
+	 * @param	object	$error
+ 	*/		
+	public function dispatch(Action $action, Action $error) {
+		$this->error = $error;
+
+		foreach ($this->pre_action as $pre_action) {
+			$result = $this->execute($pre_action);
+
+			if ($result instanceof Action) {
+				$action = $result;
+
+				break;
+			}
+		}
+
+		while ($action instanceof Action) {
+			$action = $this->execute($action);
+		}
+	}
+	
+	/**
+	 * 
+	 *
+	 * @param	object	$action
+	 * @return	object
+ 	*/
+	private function execute(Action $action) {
+		$result = $action->execute($this->registry);
+
+		if ($result instanceof Action) {
+			return $result;
+		} 
+		
+		if ($result instanceof Exception) {
+			$action = $this->error;
+			
+			$this->error = null;
+			
+			return $action;
+		}
+	}
+}