/**
 * Helper functions having to do with [Base64](https://en.wikipedia.org/wiki/Base64).
 *
 * @module
 */

// `Buffer` only exists in Node.js, so this must exist in `complete-node`.

/** Helper function to decode a base64-encoded string to a UTF-8 string. */
export function decodeBase64(base64String: string): string {
  // We intentionally do not use 2025 APIs because they are too new.
  // eslint-disable-next-line unicorn/prefer-uint8array-base64
  const buffer = Buffer.from(base64String, "base64");
  return buffer.toString("utf8");
}

/** Helper function to encode a string into a base64-encoded string. */
export function encodeBase64(string: string): string {
  const buffer = Buffer.from(string);
  // We intentionally do not use 2025 APIs because they are too new.
  // eslint-disable-next-line unicorn/prefer-uint8array-base64
  return buffer.toString("base64");
}