<?php
/**
 * Синглтон System_Router - разбирает запрошенный урл и устанавливает значения текущих и
 * запрошенных модулей и действий, а так же заполняет массив переданных в урле параметров
 */

class System_Router
{

	private static $aRoutes = array();
	private static $aParams = array();

	private static $oInstance = null;
	
	public static function getInstance()
	{
		if (is_null(self::$oInstance)) {
			self::$oInstance = new self();
		}
		return self::$oInstance;
	}


	public function __construct()
	{
		$aStrings = explode("/", preg_replace("/^\/(.*)\/?$/U", "\\1", $_SERVER['REQUEST_URI']));

		if($_SERVER['HTTP_HOST'] != 'www.'.self::clearPathWeb(self::getPathWeb()) and $_SERVER['HTTP_HOST']!= self::clearPathWeb(self::getPathWeb()))
		{
			/**self::setRequestModule('community');
			self::setCurrentSubdomain(preg_replace("/\.".self::clearPathWeb(self::getPathWeb()).".?$/", "", $_SERVER['HTTP_HOST']));

			$i = 0; $ii = 0;

			foreach ($aStrings as $key => $string)
			{
				$i++;
				if (mb_strlen(trim($string), 'UTF-8'))
				{
					if ($i == 1) {
						self::setRequestAction($string);
					} else {
						self::$aParams[$ii] = $string;
						$ii++;
					}
				}
			}**/
		}
		else
		{
			$i = 0;
			$ii = 0;
			$admin_flag = false;

			foreach ($aStrings as $key => $string)
			{
				$i++;
				if (mb_strlen(trim($string), 'UTF-8'))
				{
					if ($i == 1 and $string == 'admin') {
						$admin_flag = true;
					}

					if ($admin_flag)
					{
						if ($i == 2) {
							self::setRequestModule('admin.'.$string);
						} else if ($i == 3) {
							self::setRequestAction($string);
						} else if ($i > 3){
							self::$aParams[$ii] = $string;
							$ii++;
						}
					}
					else
					{
						if ($i == 1) {
							self::setRequestModule($string);
						} else if ($i == 2) {
							self::setRequestAction($string);
						} else {
							self::$aParams[$ii] = $string;
							$ii++;
						}
					}
				}
			}
		}

		if(System_Router::getRequestModule())
		{
			if (System_Router::checkModule(System_Router::getRequestModule())) {
				System_Router::setCurrentModule(System_Router::getRequestModule());
			} else {
				System_Router::setCurrentModule('errors');
				System_Router::setCurrentAction('404');
			}
		}
		else
		{
			if (!System_Router::checkModule(System_Router::getDefaultModule())){
				System_Router::setCurrentModule('errors');
				System_Router::setCurrentAction('404');
			} else {
				System_Router::setCurrentModule(System_Router::getDefaultModule());
			}
		}
	}

	protected function __clone(){}



	/***************************************************************************
	 * Установка и получение значений модулей, действий и параметров,
	 * запрошенных, текущих и установленных по-умолчанию.
	 **************************************************************************/
	public function setDefaultModule($val) {
		System_Settings::setDefaultModule($val);
	}
	public function getDefaultModule() {
		return System_Settings::getDefaultModule();
	}


	public function setRequestModule($val) {
		 self::$aRoutes['request_module'] = $val;
	}
	public function getRequestModule() {
		return isset(self::$aRoutes['request_module']) ? self::$aRoutes['request_module'] : false;
	}


	public function setCurrentModule($val) {
		self::$aRoutes['current_module'] = $val;
	}
	public function getCurrentModule() {
		return isset(self::$aRoutes['current_module']) ? self::$aRoutes['current_module'] : false;
	}


	public function setDefaultAction($val) {
		System_Settings::setDefaultAction($val);
	}
	public function getDefaultAction() {
		return System_Settings::getDefaultAction();
	}


	public function setRequestAction($val) {
		 self::$aRoutes['request_action'] = $val;
	}
	public function getRequestAction() {
		return isset(self::$aRoutes['request_action']) ? self::$aRoutes['request_action'] : false;
	}


	public function setCurrentAction($val) {
		self::$aRoutes['current_action'] = $val;
	}
	public function getCurrentAction() {
		return isset(self::$aRoutes['current_action']) ? self::$aRoutes['current_action'] : false;
	}


	public function setCurrentSubdomain($val) {
		self::$aRoutes['current_subdomain'] = $val;
	}
	public function getCurrentSubdomain() {
		return isset(self::$aRoutes['current_subdomain']) ? self::$aRoutes['current_subdomain'] : false;
	}


	public function setPathRoot($val) {
		System_Settings::setPathRoot($val);
	}
	public function getPathRoot() {
		return System_Settings::getPathRoot();
	}


	public function setPathWeb($val) {
		System_Settings::setPathWeb($val);
	}
	public function getPathWeb() {
		return System_Settings::getPathWeb();
	}


	public function clearPathWeb($val) {
		return preg_replace("/\/?$/", "", preg_replace("/^http:\/\//", "", trim($val)));
	}


	public function setPathCookie($val) {
		System_Settings::setPathCookie($val);
	}
	public function getPathCookie() {
		return System_Settings::getPathCookie();
	}


	public function getParams() {
		return self::$aParams;
	}


	public function getParam($i) {
		return isset(self::$aParams[$i]) ?self::$aParams[$i] : false;
	}


	public function getRoutes()
	{
		$aRoutes = array_merge(System_Settings::getRoutes(), self::$aRoutes);
		return $aRoutes;
	}


	public function checkModule($module) {
		return file_exists(System_Settings::getPathRoot().'/modules/'.$module.'/controller.php') ? true : false;
	}
	public function checkAction($action) {
		return file_exists(System_Settings::getPathRoot().'/modules/'.self::getCurrentModule().'/'.$action.'.action.php') ? true : false;
	}


	public function redirect($url)
	{
		header('Location: '.$url);
		echo'<script>window.location = "'.$url.'";</script>';
	}
}
?>