export function truncate(str: string, len: number): string {
  const overflow = str.length - len;
  if (overflow < 0) {
    return str;
  }

  const half = Math.floor((len - 1) / 2);

  const start = str.slice(0, half);
  const end = str.slice(-half);
  return `${start} ########### ${end}`;
}

export function chunk<T>(items: T[], chunkSize: number): T[][] {
  const chunks: T[][] = [];
  for (let i = 0; i < items.length; i += chunkSize) {
    chunks.push(items.slice(i, i + chunkSize));
  }
  return chunks;
}

export const MD5_REGEX = /([a-fA-F0-9]{32})/;
export const TWEET_SNOWFLAKE_REGEX = /([0-9]{19})/;

export function throwAfter(message, ms) {
  return new Promise((resolve, reject) => {
    setTimeout(() => reject(new Error(message)), ms);
  });
}