// Copyright 2024, Command Line Inc.
// SPDX-License-Identifier: Apache-2.0s

import base64 from "base64-js";

function isBlank(str: string): boolean {
    return str == null || str == "";
}

function base64ToString(b64: string): string {
    if (b64 == null) {
        return null;
    }
    if (b64 == "") {
        return "";
    }
    const stringBytes = base64.toByteArray(b64);
    return new TextDecoder().decode(stringBytes);
}

function stringToBase64(input: string): string {
    const stringBytes = new TextEncoder().encode(input);
    return base64.fromByteArray(stringBytes);
}

function base64ToArray(b64: string): Uint8Array {
    const rawStr = atob(b64);
    const rtnArr = new Uint8Array(new ArrayBuffer(rawStr.length));
    for (let i = 0; i < rawStr.length; i++) {
        rtnArr[i] = rawStr.charCodeAt(i);
    }
    return rtnArr;
}

export { base64ToArray, base64ToString, isBlank, stringToBase64 };