@cstan/local-uid/dist/index.js

A CommonJS module that generates and tests for a unique identifier.

"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
exports.isValidLuid = exports.createLuid = void 0;
const { onlyDigits } = require("@cstan/only-digits");
const rand = () => {
    return (Math.floor(Math.random() * (65535 - 4096 + 1)) + 4096).toString(16);
};
const me = (s) => {
    let hash = "";
    let i = 0;
    const sn = s + "j8cls3$w";
    while (hash.length < 8) {
        hash += (sn.charCodeAt(i) & 15).toString(16);
        i += 1;
    }
    return hash;
};
// This creates a unique id that passes the isValidLuid() test
// is compatible with established projects legacy unique id.
function createLuid(seed = "") {
    const d = Number(onlyDigits(new Date().toISOString()))
        .toString(16)
        .slice(-12);
    let luid_array = [];
    luid_array.push(d);
    luid_array.push(me(seed));
    luid_array.push(rand());
    luid_array.push(rand());
    return luid_array.join("-");
}
exports.createLuid = createLuid;
function isValidLuid(id) {
    return /^[0-9a-fA-F]{12}-[0-9a-fA-F]{8}-[0-9a-fA-F]{4}-[0-9a-fA-F]{4}$/.test(id);
}
exports.isValidLuid = isValidLuid;