export const HEARTBEAT_TOKEN = "HEARTBEAT_OK";
export const SILENT_REPLY_TOKEN = "NO_REPLY";

function escapeRegExp(value: string): string {
  return value.replace(/[.*+?^${}()|[\]\\]/g, "\\$&");
}

export function isSilentReplyText(
  text: string | undefined,
  token: string = SILENT_REPLY_TOKEN,
): boolean {
  if (!text) return false;
  const re = new RegExp(`^\\s*${escapeRegExp(token)}(?=$|\\W)`);
  return re.test(text);
}