CO TO KURVA JE!!!!
<?php
class User {

    var $userdata;

    function User() {
        session_start();
        header("Cache-control: private");
    }

    function logout() {
        unset($this->userdata);
        session_destroy();
        return true;
    }

    function checkLogin($login = '', $password = '', $successURL = '', $failURL = '') {
        require_once 'database.php';

        $db = new Database;

        if ($_SESSION['user_login'] && $_SESSION['user_password']) {
            $user = $db->query("SELECT * FROM rs_users WHERE login = ".$_SESSION['user_login']." AND password = ".$_SESSION['user_password']."");
            $this->userdata = $db->fetchArray($user);

            if ($db->numRows($user) == 1) {
                if ($successURL) {
                    header('location: '.$successURL);
                }

                return true;
            }
            else {
                $this->logout();

                if ($failURL) {
                    header('location: '.$failURL);
                }

                return false;
            }
        }
        else {
            $user = $db->query("SELECT * FROM rs_users WHERE login = '$login' AND password = '$password'");
            $this->userdata = $db->fetchArray($user);

            if ($db->numRows($user) == 1) {
                $_SESSION['user_login'] = $login;
                $_SESSION['user_id'] = $this->userdata['id'];
                $_SESSION['user_password'] = $this->userdata['password'];

                if ($successURL) {
                    header('location: '.$successURL);
                }

                return true;
            }
            else {
                unset($this->userdata);

                if ($failURL) {
                    header('location: '.$failURL);
                }

                return false;
            }
        }
    }

    function userHasPermission($userId, $permissionName) {
        require_once 'database.php';
        require_once 'validation.php';

        $db = new Database;
        $validation = new Validation;

        if (!$validation->validateNumber($userId)) {
            return false;
        }

        $hasPermission = false;

        $permissionId = $db->fetchArray($db->query("SELECT id FROM rs_permissions WHERE name = '$permission'"));
        $userGroups = $db->query("SELECT group_id FROM rs_user_group_relations WHERE user_id = $userId");
        if ($userGroups) {
            while ($group = $db->fetchArray($userGroups)) {
                $groupPermissions = $db->fetchArray($db->query("SELECT permission_id FROM rs_group_permission_relations WHERE group_id = ".$group['group_id'].""));
                if ($permissionId['id'] == $groupPermissions['permission_id']) {
                    $hasPermission = true;
                    break;
                }
            }
        }

        return ($hasPermission)?true:false;
    }

    function userGetPermissions($userId) {
        require_once 'database.php';
        require_once 'validation.php';

        $db = new Database;
        $validation = new Validation;

        if (!$validation->validateNumber($userId)) {
            return false;
        }

        $userGroups = $db->query("SELECT group_id FROM rs_user_group_relations WHERE user_id = $userId");
        if ($userGroups) {
            while ($group = $db->fetchArray($userGroups)) {
                $groupPermissions = $db->query("SELECT permission_id FROM rs_group_permission_relations WHERE group_id = ".$group['group_id']."");
                if ($groupPermissions) {
                    while ($permission = $db->fetchArray($groupPermissions)) {
                        $permissionInfo = $db->fetchArray($db->query("SELECT name FROM rs_permissions WHERE id = ".$permission['permission_id'].""));
                        $this->userdata['permissions'][] .= $permissionInfo['name'];
                    }
                }
            }
        return $this->userdata['permissions'];
        }
        else return false;
    }

    function userIsInGroup($userId, $groupName) {
        require_once 'database.php';
        require_once 'validation.php';

        $db = new Database;
        $validation = new Validation;

        if (!$validation->validateNumber($userId)) {
            return false;
        }

        $groupId = $db->fetchArray($db->query("SELECT id FROM rs_groups WHERE name = '$groupName'"));
        if ($groupId) {
            $groupRelation = $db->query("SELECT id FROM rs_user_group_relations WHERE group_id = ".$groupId['id']." AND user_id = $userId");

            if ($db->numRows($groupRelation) > 0) {
                return true;
            }
        }
        else return false;
    }

    function userGetGroups($userId) {
        require_once 'database.php';
        require_once 'validation.php';

        $db = new Database;
        $validation = new Validation;

        if (!$validation->validateNumber($userId)) {
            return false;
        }

        $userGroups = $db->query("SELECT group_id FROM rs_user_group_relations WHERE user_id = $userId");
        if ($userGroups) {
            while ($group = $db->fetchArray($userGroups)) {
                $groupInfo = $db->fetchArray($db->query("SELECT name FROM rs_groups WHERE id = ".$group['group_id'].""));
                $this->userdata['groups'][] .= $groupInfo['name'];
            }

            return $this->userdata['groups'];
        }
        else return false;
    }
}
?>