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2897692cf1
* fix created timestamp precision * perf * Update Snowflake.js * gawdl3y was butthurt * Update Snowflake.js
72 lines
2.3 KiB
JavaScript
72 lines
2.3 KiB
JavaScript
const Long = require('long');
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// Discord epoch (2015-01-01T00:00:00.000Z)
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const EPOCH = 1420070400000;
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let INCREMENT = 0;
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/**
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* A container for useful snowflake-related methods
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*/
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class SnowflakeUtil {
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/**
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* A Twitter snowflake, except the epoch is 2015-01-01T00:00:00.000Z
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* ```
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* If we have a snowflake '266241948824764416' we can represent it as binary:
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*
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* 64 22 17 12 0
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* 000000111011000111100001101001000101000000 00001 00000 000000000000
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* number of ms since discord epoch worker pid increment
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* ```
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* @typedef {string} Snowflake
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*/
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/**
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* Generates a Discord snowflake
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* <info>This hardcodes the worker ID as 1 and the process ID as 0.</info>
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* @returns {Snowflake} The generated snowflake
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*/
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static generate() {
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if (INCREMENT >= 4095) INCREMENT = 0;
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const BINARY = `${pad((Date.now() - EPOCH).toString(2), 42)}0000100000${pad((INCREMENT++).toString(2), 12)}`;
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return Long.fromString(BINARY, 2).toString();
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}
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/**
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* A deconstructed snowflake
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* @typedef {Object} DeconstructedSnowflake
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* @property {number} timestamp Timestamp the snowflake was created
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* @property {Date} date Date the snowflake was created
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* @property {number} workerID Worker ID in the snowflake
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* @property {number} processID Process ID in the snowflake
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* @property {number} increment Increment in the snowflake
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* @property {string} binary Binary representation of the snowflake
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*/
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/**
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* Deconstructs a Discord snowflake
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* @param {Snowflake} snowflake Snowflake to deconstruct
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* @returns {DeconstructedSnowflake} Deconstructed snowflake
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*/
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static deconstruct(snowflake) {
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const BINARY = pad(Long.fromString(snowflake).toString(2), 64);
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const res = {
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timestamp: parseInt(BINARY.substring(0, 42), 2) + EPOCH,
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workerID: parseInt(BINARY.substring(42, 47), 2),
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processID: parseInt(BINARY.substring(47, 52), 2),
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increment: parseInt(BINARY.substring(52, 64), 2),
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binary: BINARY,
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};
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Object.defineProperty(res, 'date', {
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get: function get() { return new Date(this.timestamp); },
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enumerable: true,
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});
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return res;
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}
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}
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function pad(v, n, c = '0') {
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return String(v).length >= n ? String(v) : (String(c).repeat(n) + v).slice(-n);
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}
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module.exports = SnowflakeUtil;
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