@storm-stack/unique-identifier/dist/snowflake.mjs

This package provides a simple way to generate various types of unique identifiers.

export const DEFAULT_SHARD_ID = 1;
export const DEFAULT_EPOCH = Date.UTC(1970, 0, 1).valueOf();
let sequence = 1;
function ToBinaryString(snowflake2) {
  const cached64BitZeros = "0000000000000000000000000000000000000000000000000000000000000000";
  const binValue = BigInt(snowflake2).toString(2);
  return binValue.length < 64 ? cached64BitZeros.slice(0, Math.max(0, 64 - binValue.length)) + binValue : binValue;
}
function extractBits(snowflake2, start, length) {
  return Number.parseInt(
    length ? ToBinaryString(snowflake2).slice(start, start + length) : ToBinaryString(snowflake2).slice(Math.max(0, start)),
    2
  );
}
export function snowflake({
  shardId,
  epoch,
  timestamp
}) {
  let result = BigInt(
    timestamp ? timestamp instanceof Date ? timestamp.valueOf() : new Date(timestamp).valueOf() : Date.now()
  ) - BigInt(epoch ?? DEFAULT_EPOCH) << BigInt(22);
  result |= BigInt((shardId ?? DEFAULT_SHARD_ID) % 1024) << BigInt(12);
  result |= BigInt(sequence++ % 4096);
  return result.toString();
}
export function deconstructSnowflake(snowflake2) {
  const binary = ToBinaryString(snowflake2);
  return {
    snowflake: snowflake2,
    timestamp: extractBits(snowflake2, 1, 41),
    shard_id: extractBits(snowflake2, 42, 10),
    sequence: extractBits(snowflake2, 52),
    binary
  };
}
export function isValidSnowflake(snowflake2) {
  if (!/^\d{19}$/.test(snowflake2)) {
    return false;
  }
  try {
    deconstructSnowflake(snowflake2);
    return true;
  } catch {
    return false;
  }
}