twitter snowflake id calc

snowflake.js

/**
 * Parses a Snowflake ID and returns its components.
 * @param {string|number} snowflakeId The Snowflake ID to parse.
 * @param {number} epoch The epoch to use for timestamp calculation.
 *                       Defaults to Twitter's epoch (1288834974657).
 * @returns {object} An object containing the parsed components.
 */
function parseSnowflake(snowflakeId, epoch = 1288834974657) {
 const id = BigInt(snowflakeId);
 const timestampBits = 41n;
 const machineIdBits = 10n;
 const sequenceBits = 12n;
 const maxTimestamp = (1n << timestampBits) - 1n;
 const maxMachineId = (1n << machineIdBits) - 1n;
 const maxSequence = (1n << sequenceBits) - 1n;
 const timestampShift = machineIdBits + sequenceBits;
 const machineIdShift = sequenceBits;
 const timestamp = Number((id >> timestampShift) + BigInt(epoch));
 const machineId = Number((id >> machineIdShift) & maxMachineId);
 const sequence = Number(id & maxSequence);
 const date = new Date(timestamp);
 return {
  id: String(id),
  timestamp: timestamp,
  date: date.toISOString(),
  machineId: machineId,
  sequence: sequence,
 };
}
/**
 * Prints the components of a parsed Snowflake ID to the console.
 * @param {object} snowflakeData The object returned by parseSnowflake.
 */
function printSnowflake(snowflakeData) {
 console.log("Snowflake ID:", snowflakeData.id);
 console.log("Timestamp:", snowflakeData.timestamp);
 console.log("Date (UTC):", snowflakeData.date);
 console.log("Machine ID:", snowflakeData.machineId);
 console.log("Sequence:", snowflakeData.sequence);
}
// Example Usage:
const snowflakeId = "1541815603606036480"; // Example from the Wikipedia article
const parsedSnowflake = parseSnowflake(snowflakeId);
printSnowflake(parsedSnowflake);
printSnowflake(parseSnowflake(process.argv[2]))
// // Example with Discord epoch
// const discordSnowflakeId = "297017379053946880";
// const discordEpoch = 1420070400000; // Discord Epoch: 2015-01-01T00:00:00.000Z
// const parsedDiscordSnowflake = parseSnowflake(discordSnowflakeId, discordEpoch);
// printSnowflake(parsedDiscordSnowflake);