unique-identity/lib/generator.js

Amazingly unique ids which are short and Perfect for Url Shorteners, Product SKUs, Socket Ids, Data Base Ids, SQL, MongoDB, PostGres, MySQL, MSSQL, Redis ids, and any other id users might see...

'use strict';
const seeds = require("./seeder");
const characters = require("./characters");
const bigInt = require("big-integer");

module.exports.get = (prefix = '', suffix = '') => {
    let fillers = characters.fillers();
    let rixit;
    let residual = seeds();
    let result = '';
    while (true) {
        rixit = bigInt(residual).remainder(64).toString()
        result = fillers.charAt(rixit) + result;
        residual = bigInt(residual).divide(64);
        if (residual == 0)
            break;
    }
    return ((prefix || '') + result + (suffix || ''));
}

module.exports.characters = (unique64Characters) => {
    return characters.setFillers(unique64Characters);
}