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<?php

/* vim: set expandtab tabstop=4 shiftwidth=4 softtabstop=4 foldmethod=marker: */

/**

 * Auth Controller

 *

 * PHP versions 4 and 5

 *

 * LICENSE: This source file is subject to version 3.01 of the PHP license

 * that is available through the world-wide-web at the following URI:

 * http://www.php.net/license/3_01.txt.  If you did not receive a copy of

 * the PHP License and are unable to obtain it through the web, please

 * send a note to license@php.net so we can mail you a copy immediately.

 *

 * @category   Authentication

 * @package    Auth

 * @author     Yavor Shahpasov <yavo@netsmart.com.cy>

 * @author     Adam Ashley <aashley@php.net>

 * @copyright  2001-2006 The PHP Group

 * @license    http://www.php.net/license/3_01.txt  PHP License 3.01

 * @version    CVS: $Id: Controller.php,v 1.1.4.2 2007-11-19 14:54:06 jp_milcent Exp $

 * @link       http://pear.php.net/package/Auth

 * @since      File available since Release 1.3.0

 */

/**

 * Controlls access to a group of php access

 * and redirects to a predefined login page as

 * needed

 *

 * In all pages

 * <code>

 * include_once('Auth.php');

 * include_once('Auth/Controller.php');

 * $_auth = new Auth('File', 'passwd');

 * $authController = new Auth_Controller($_auth, 'login.php', 'index.php');

 * $authController->start();

 * </code>

 *

 * In login.php

 * <code>

 * include_once('Auth.php');

 * include_once('Auth/Controller.php');

 * $_auth = new Auth('File', 'passwd');

 * $authController = new Auth_Controller($_auth, 'login.php', 'index.php');

 * $authController->start();

 * if( $authController->isAuthorised() ){

 *   $authController->redirectBack();

 * }

 * </code>

 *

 * @category   Authentication

 * @author     Yavor Shahpasov <yavo@netsmart.com.cy>

 * @author     Adam Ashley <aashley@php.net>

 * @copyright  2001-2006 The PHP Group

 * @license    http://www.php.net/license/3_01.txt  PHP License 3.01

 * @version    Release: 1.5.4  File: $Revision: 1.1.4.2 $

 * @link       http://pear.php.net/package/Auth

 * @since      Class available since Release 1.3.0

 */

class Auth_Controller

{

    // {{{ properties

    /**

     * The Auth instance this controller is managing

     *

     * @var object Auth

     */

    var $auth = null;

    /**

     * The login URL

     * @var string

     * */

    var $login = null;

    /**

     * The default index page to use when the caller page is not set

     *

     * @var string

     */

    var $default = null;

    /**

     * If this is set to true after a succesfull login the

     * Auth_Controller::redirectBack() is invoked automatically

     *

     * @var boolean

     */

    var $autoRedirectBack = false;

    // }}}

    // {{{ Auth_Controller() [constructor]

    /**

     * Constructor

     *

     * @param Auth An auth instance

     * @param string The login page

     * @param string The default page to go to if return page is not set

     * @param array Some rules about which urls need to be sent to the login page

     * @return void

     * @todo Add a list of urls which need redirection

     */

    function Auth_Controller(&$auth_obj, $login='login.php', $default='index.php', $accessList=array())

    {

        $this->auth =& $auth_obj;

        $this->_loginPage = $login;

        $this->_defaultPage = $default;

        @session_start();

        if (!empty($_GET['return']) && $_GET['return'] && !strstr($_GET['return'], $this->_loginPage)) {

            $this->auth->setAuthData('returnUrl', $_GET['return']);

        }

        if(!empty($_GET['authstatus']) && $this->auth->status == '') {

            $this->auth->status = $_GET['authstatus'];

        }

    }

    // }}}

    // {{{ setAutoRedirectBack()

    /**

     * Enables auto redirection when login is done

     *

     * @param bool Sets the autoRedirectBack flag to this

     * @see Auth_Controller::autoRedirectBack

     * @return void

     */

    function setAutoRedirectBack($flag = true)

    {

        $this->autoRedirectBack = $flag;

    }

    // }}}

    // {{{ redirectBack()

    /**

     * Redirects Back to the calling page

     *

     * @return void

     */

    function redirectBack()

    {

        // If redirectback go there

        // else go to the default page

        $returnUrl = $this->auth->getAuthData('returnUrl');

        if(!$returnUrl) {

            $returnUrl = $this->_defaultPage;

        }

        // Add some entropy to the return to make it unique

        // avoind problems with cached pages and proxies

        if(strpos($returnUrl, '?') === false) {

            $returnUrl .= '?';

        }

        $returnUrl .= uniqid('');

        // Track the auth status

        if($this->auth->status != '') {

            $url .= '&authstatus='.$this->auth->status;

        }

        header('Location:'.$returnUrl);

        print("You could not be redirected to <a href=\"$returnUrl\">$returnUrl</a>");

    }

    // }}}

    // {{{ redirectLogin()

    /**

      * Redirects to the login Page if not authorised

      *

      * put return page on the query or in auth

      *

      * @return void

      */

    function redirectLogin()

    {

        // Go to the login Page

        // For Auth, put some check to avoid infinite redirects, this should at least exclude

        // the login page

        $url = $this->_loginPage;

        if(strpos($url, '?') === false) {

            $url .= '?';

        }

        if(!strstr($_SERVER['PHP_SELF'], $this->_loginPage)) {

            $url .= 'return='.urlencode($_SERVER['PHP_SELF']);

        }

        // Track the auth status

        if($this->auth->status != '') {

            $url .= '&authstatus='.$this->auth->status;

        }

        header('Location:'.$url);

        print("You could not be redirected to <a href=\"$url\">$url</a>");

    }

    // }}}

    // {{{ start()

    /**

      * Starts the Auth Procedure

      *

      * If the page requires login the user is redirected to the login page

      * otherwise the Auth::start is called to initialize Auth

      *

      * @return void

      * @todo Implement an access list which specifies which urls/pages need login and which do not

      */

    function start()

    {

        // Check the accessList here

        // ACL should be a list of urls with allow/deny

        // If allow set allowLogin to false

        // Some wild card matching should be implemented ?,*

        if(!strstr($_SERVER['PHP_SELF'], $this->_loginPage) && !$this->auth->checkAuth()) {

            $this->redirectLogin();

        } else {

            $this->auth->start();

            // Logged on and on login page

            if(strstr($_SERVER['PHP_SELF'], $this->_loginPage) && $this->auth->checkAuth()){

                $this->autoRedirectBack ?

                    $this->redirectBack() :

                    null ;

            }

        }

    }

    // }}}

    // {{{ isAuthorised()

    /**

      * Checks is the user is logged on

      * @see Auth::checkAuth()

      */

    function isAuthorised()

    {

        return($this->auth->checkAuth());

    }

    // }}}

    // {{{ checkAuth()

    /**

      * Proxy call to auth

      * @see Auth::checkAuth()

      */

    function checkAuth()

    {

        return($this->auth->checkAuth());

    }

    // }}}

    // {{{ logout()

    /**

      * Proxy call to auth

      * @see Auth::logout()

      */

    function logout()

    {

        return($this->auth->logout());

    }

    // }}}

    // {{{ getUsername()

    /**

      * Proxy call to auth

      * @see Auth::getUsername()

      */

    function getUsername()

    {

        return($this->auth->getUsername());

    }

    // }}}

    // {{{ getStatus()

    /**

      * Proxy call to auth

      * @see Auth::getStatus()

      */

    function getStatus()

    {

        return($this->auth->getStatus());

    }

    // }}}

}

?>