<?php
require("config.php");

/**
 * Router Class - Framework
 * @author Erwin Okken <erwtje@gmail.com>
 * @version 1.0
 */
class Router
{
	/**
	 * @var string path
	 */
	var $path;

	/**
	 * @var string page
	 */
	var $page;

	/**
	 * @var string action
	 */
	var $action;

	/**
	 * @var array optional parameters
	 */
	var $parameters = array();

	/**
	 * Constructor gets the current page, action and optional parameters.
	 * Redirects to dispatch function.
	 */
	public function __construct()
	{
		$requestURI = explode('/', $_SERVER['REQUEST_URI']);
		$scriptName = explode('/',$_SERVER['SCRIPT_NAME']);
		for($i=0;$i < sizeof($scriptName);$i++)
		{
			if(strtolower($requestURI[$i]) == strtolower($scriptName[$i]))
			{
				$this->path .= $requestURI[$i] . "/";
				unset($requestURI[$i]);
			}
		}

		// dit kan later weg:
		define("PATH",$this->path);

		$url = array_values($requestURI);
		for($i=0;$i < sizeof($url);$i++){
			if($i==0){
				$this->page = $url[$i];
			}
			elseif($i==1){
				$this->action = $url[$i];
			}
			else{
				$this->parameters[] = $url[$i];
			}
		}

		$this->page = (empty($this->page)) ? "home" : $this->page;
		$this->action = (empty($this->action)) ? "news" : $this->action;
		switch($this->page){
			case "home":
			case "guestbook":
				try
				{
					$this->dispatch();
				}
				catch(Exception $e)
				{
					echo $e->getMessage();
				}
				break;

			default:
				$this->page = "home";
				$this->action = "404";
				$this->dispatch();
				break;
		}
	}

	/**
	 * Dispatch method checks the called controller and method and redirects it.
	 * @throw Exception When controller doesn't exist
	 */
	public function dispatch()
	{
		if(file_exists("controllers/" . $this->page . ".class.php"))
		{
			require_once("controllers/" . $this->page . ".class.php");
		}
		else
		{
			throw new Exception("Cannot find the controller file: " . $this->page);
		}

		//$controllername = ucfirst($this->page) . "_Controller";
		//$controller = new $controllername();

		if(class_exists(ucfirst($this->page) . "_Controller"))
		{
			// Onderstaande methode werkt, maar STATIC.
			// call_user_func_array(array(ucfirst($this->page) . '_Controller', $this->action),array());
			$controllername = $this->page . "_Controller";
			$action = $this->action;

			$curcontroller = new $controllername;
			if(method_exists($controllername, $this->action))
			{
				$curcontroller->$action();
			}
			else
			{
				throw new Exception("Methode niet gevonden: " . $action);
			}
		}
		else
		{
			throw new Exception("Cannot find controller class: " . $this->page);
		}
	}
}

$Router = new Router();
?>