export function normalizeIncoming(msg: unknown): { type: string | null, data: unknown } {
  if (!msg) return { type: null, data: null };
  let parsed: unknown = null;
  try {
    if (typeof msg === 'string') {
      parsed = JSON.parse(msg);
    } else {
      parsed = msg;
    }
  } catch (e) {
    return { type: null, data: null };
  }
  if (!parsed) return { type: null, data: null };
  const type = (parsed as any).type || (parsed as any).action || null;
  const data = (parsed as any).data || (Object.keys(parsed as any).length ? Object.assign({}, parsed as any) : null);
  return { type, data };
}

export function shuffleArray<T>(array: T[]): T[] {
  let currentIndex = array.length, temporaryValue: T | undefined, randomIndex: number;
  while (0 !== currentIndex) {
    randomIndex = Math.floor(Math.random() * currentIndex);
    currentIndex -= 1;
  // use non-null assertions because we're swapping indices that exist
  temporaryValue = array[currentIndex] as T;
  array[currentIndex] = array[randomIndex] as T;
  array[randomIndex] = temporaryValue as T;
  }
  return array;
}