<?php
/**
 * eGroupWare - GroupDAV access
 *
 * Using the PEAR HTTP/WebDAV/Server class (which need to be installed!)
 *
 * @link http://www.egroupware.org
 * @license http://opensource.org/licenses/gpl-license.php GPL - GNU General Public License
 * @package api
 * @subpackage groupdav
 * @author Ralf Becker <RalfBecker-AT-outdoor-training.de>
 * @copyright (c) 2007/8 by Ralf Becker <RalfBecker-AT-outdoor-training.de>
 * @version $Id$
 */

/**
 * check if the given user has access
 *
 * Create a session or if the user has no account return authenticate header and 401 Unauthorized
 *
 * @param array &$account
 * @return int session-id
 */
function check_access(&$account)
{
	$account = array(
		'login'  => $_SERVER['PHP_AUTH_USER'],
		'passwd' => $_SERVER['PHP_AUTH_PW'],
		'passwd_type' => 'text',
	);
	// no session for clients known to NOT use it (no cookie support)
	$agent = strtolower($_SERVER['HTTP_USER_AGENT']);
	foreach(array(
		'davkit',	// Apple iCal
		'bionicmessage.net',
		'ZideOne',
		'Lightning',
	) as $test)
	{
		if (($no_session = strpos($agent,$test) !== false)) break;
	}
	//error_log("GroupDAV PHP_AUTH_USER={$_SERVER['PHP_AUTH_USER']}, HTTP_USER_AGENT={$_SERVER['HTTP_USER_AGENT']} --> no_session=".(int)$no_session);

	if (!($sessionid = $GLOBALS['egw']->session->create($account,'','',$no_session)))
	{
		header('WWW-Authenticate: Basic realm="'.groupdav::REALM.'"');
        header('HTTP/1.1 401 Unauthorized');
        header('X-WebDAV-Status: 401 Unauthorized', true);
        exit;
	}
	return $sessionid;
}

$GLOBALS['egw_info']['flags'] = array(
	'noheader'  => True,
	'currentapp' => 'groupdav',
	'autocreate_session_callback' => 'check_access',
);
// if you move this file somewhere else, you need to adapt the path to the header!
include(dirname(__FILE__).'/header.inc.php');

$groupdav = new groupdav();
$groupdav->ServeRequest();