index.js

"use strict";
var cryptoRandom = require("math-random");

function idGenerate() {
  var length =
    arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : 12;
  var scope =
    arguments.length > 1 && arguments[1] !== undefined
      ? arguments[1]
      : "ABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789";
  if (typeof length !== "number") throw new Error("length must be a number");
  if (typeof scope !== "string") throw new Error("scope must be a string");
  var str = "";
  var l = scope.length;

  for (var i = 0; i < length; i++) {
    str += scope.charAt(Math.floor(Math.random() * l));
  }

  return str;
}

module.exports = function customId(customId) {
  if (typeof customId === "undefined") {
    throw new Error(
      "Custom Id expects an object as the argument. Make sure all values of that object are string."
    );
  }
  var multiply = customId.uniqueId || 97232;
  var crypticNotSecure = Math.floor(Math.random() * multiply);
  var crypticSecureFun = cryptoRandom() * multiply;
  var crypticSecure = Math.floor(crypticSecureFun);
  var length = customId.randomLength || 2;
  var firstId = idGenerate(
    length,
    crypticSecure.toString() || crypticNotSecure.toString()
  );
  if (customId.name) {
    var name = idGenerate(
      length,
      customId.name.replace(/[^a-zA-Z0-9]/g, "").toString() || ""
    );
  } else {
    var name = idGenerate(length, "ABCDEFGHIJKLMNOPQRSTUVXYZ");
  }
  if (customId.email) {
    var email = idGenerate(
      length,
      customId.email.replace(/[^a-zA-Z0-9]/g, "").toString() || ""
    );
  } else {
    var email = idGenerate(length, "ABCDEFGHIJKLMNOPQRSTUVXYZ");
  }

  var lastId = idGenerate(
    length,
    crypticSecure.toString() || crypticNotSecure.toString()
  );
  var result = firstId + name + lastId + email;

  if (customId.lowerCase) {
    return result.toLowerCase();
  } else {
    return result.toUpperCase();
  }
};