base64.js

import { Base64 } from 'js-base64';

let moduleAvailable = true;
try {
    if (Base64 === undefined) {
        moduleAvailable = false;
    }
} catch (e) {
    moduleAvailable = false;
}

function _btoa(d) {
    if (window?.btoa) {
        return window.btoa(d);
    } else if (moduleAvailable) {
        return Base64.btoa(d);
    } else {
        throw new Error("No Base64 API detected or usable");
    }
}

function _atob(d) {
    if (window?.atob) {
        return window.atob(d);
    } else if (moduleAvailable) {
        return Base64.atob(d);
    } else {
        throw new Error("No Base64 API detected or usable");
    }
}

export function uencode(u) {
    if (moduleAvailable) {
        return Base64.fromUint8Array(u);
    } else {
        return _btoa(String.fromCharCode(...u));
    }
}

export function udecode(b, t = Uint8Array) {
    if (moduleAvailable && t === Uint8Array) {
        return Base64.toUint8Array(b);
    } else {
        return t.from(_atob(b), c => c.charCodeAt(0));
    }
}

export const encode = _btoa;
export const decode = _atob;