<?php

require('includes/starthere.php');

if ( !isset($_GET['op']) )

	die();

$result = false;

switch($_GET['op'])

{

	case 'checkAvailability':

		if ( !preg_match('/^[a-z0-9]{3,32}$/', $_GET['uid']) )

		{

			$result = 'Username contains invalid characters, or does not meet length requirement (3-32 characters).';

			break;

		}

		$userinfo = ldap_get_user($_GET['uid']);

		if ( !$userinfo )

			$result = true;

		else

			$result = 'This username is already taken.';

	case 'listUsers':

		$result = ldap_list_users();

		break;

	case 'getGroup':

		$result = ldap_get_group($_GET['gid']);

		break;

	case 'removeUserFromGroup':

		$group = ldap_get_group($_GET['gid']);

		if ( in_array($_GET['uid'], $group['memberUid']) )

			$result = ldap_delete_group_member($_GET['gid'], $_GET['uid']);

		break;

	case 'addUserToGroup':

		$group = ldap_get_group($_GET['gid']);

		if ( $group && !in_array($_GET['uid'], $group['memberUid']) )

			$result = ldap_add_group_member($_GET['gid'], $_GET['uid']);

		break;

}

header('Content-type: text/javascript');

echo json_encode($result);