export function isLoggedIn() {
    return !!localStorage.getItem('qdb_token');
}

export function getRole() {
    return localStorage.getItem('qdb_role') || '';
}

export function getUser() {
    return localStorage.getItem('qdb_user') || '';
}

export function canEdit() {
    const r = getRole();
    return r === 'admin' || r === 'supervisor';
}

export function authGuard(navigate, handler) {
    return (params) => {
        if (!isLoggedIn()) { navigate('#/login'); return; }
        return handler(params);
    };
}

export function roleGuard(navigate, roles, handler) {
    return (params) => {
        if (!isLoggedIn()) { navigate('#/login'); return; }
        if (!roles.includes(getRole())) { navigate('#/'); return; }
        return handler(params);
    };
}