@digitalmaas/uuid-base62/dist/index.js

Base62 UUID encoder and decoder

// lib/index.ts
import baseX from "base-x";

// lib/helpers.ts
function trimLeft(target, length) {
  target = String(target);
  let trim = 0;
  while (target[trim] === "0" && target.length - trim > length) trim++;
  return target.slice(trim);
}
function ensureLength(target, length) {
  target = String(target);
  if (target.length < length) {
    return target.padStart(length, "0");
  }
  if (target.length > length) {
    return trimLeft(target, length);
  }
  return target;
}

// lib/index.ts
var base62Alphabet = "0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ";
var UUID_LENGTH = 36;
var UUID_NO_DASH = UUID_LENGTH - 4;
var ID_LENGTH = 22;
var base62 = baseX(base62Alphabet);
function encode(input, options) {
  if (!(typeof input === "string" && input.length === UUID_LENGTH || Buffer.isBuffer(input))) {
    throw new TypeError("encode input is not a valid uuid");
  }
  options = options || {};
  const encoding = options.encoding || "hex";
  const base = options.base || base62;
  if (typeof input === "string") {
    input = Buffer.from(input.replace(/-/g, ""), encoding);
  }
  const output = base.encode(input);
  const length = options.length === false ? false : options.length || ID_LENGTH;
  return length ? ensureLength(output, length) : output;
}
function decode(input, options) {
  if (!(typeof input === "string" && input.length > 0)) {
    throw new TypeError("decode input is not valid");
  }
  options = options || {};
  const encoding = options.encoding || "hex";
  const base = options.base || base62;
  const length = options.length || UUID_NO_DASH;
  let decoded = Buffer.from(base.decode(input)).toString(encoding);
  decoded = ensureLength(decoded, length);
  const chars = decoded.split("");
  chars.splice(8, 0, "-");
  chars.splice(13, 0, "-");
  chars.splice(18, 0, "-");
  chars.splice(23, 0, "-");
  return chars.join("");
}
export {
  base62,
  base62Alphabet,
  baseX,
  decode,
  encode
};