// Copyright Amazon.com, Inc. or its affiliates. All Rights Reserved.
// SPDX-License-Identifier: Apache-2.0

import { getAtob } from '../../globalHelpers';
import { Base64Decoder } from '../types';

export const base64Decoder: Base64Decoder = {
	convert(input, options) {
		let inputStr = input;

		// urlSafe character replacement options conform to the base64 url spec
		// https://datatracker.ietf.org/doc/html/rfc4648#page-7
		if (options?.urlSafe) {
			inputStr = inputStr.replace(/-/g, '+').replace(/_/g, '/');
		}

		return getAtob()(inputStr);
	},
};