// A position can travel in the URL as ?fen=... so a game or puzzle is shareable
// without any account or server.
export function fenFromUrl(): string | null {
  const params = new URLSearchParams(location.search);
  const fen = params.get("fen");
  return fen ? decodeURIComponent(fen) : null;
}

export function routeFromUrl(): string {
  const hash = location.hash.replace(/^#\/?/, "");
  return hash || "home";
}

export function goto(route: string) {
  location.hash = `/${route}`;
}