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// Copyright 2018-2020 the Deno authors. All rights reserved. MIT license.
import {  decode as convertBase64ToArrayBuffer,  encode as convertArrayBufferToBase64,} from "./base64.ts";
/* * Some variants allow or require omitting the padding '=' signs: * https://en.wikipedia.org/wiki/Base64#URL_applications */export function addPaddingToBase64url(base64url: string): string {  if (base64url.length % 4 === 2) return base64url + "==";  if (base64url.length % 4 === 3) return base64url + "=";  if (base64url.length % 4 === 1) {    throw new TypeError("Illegal base64url string!");  }  return base64url;}
function convertBase64urlToBase64(base64url: string): string {  return addPaddingToBase64url(base64url)    .replace(/\-/g, "+")    .replace(/_/g, "/");}
function convertBase64ToBase64url(base64: string): string {  return base64.replace(/=/g, "").replace(/\+/g, "-").replace(/\//g, "_");}
/** * Converts given data with base64url encoding. * Removes paddings '='. * @param data input to encode */export function encode(data: string | ArrayBuffer): string {  return convertBase64ToBase64url(convertArrayBufferToBase64(data));}
/** * Converts given base64url encoded data back to original * @param data input to decode */export function decode(data: string): ArrayBuffer {  return convertBase64ToArrayBuffer(convertBase64urlToBase64(data));}