karyal-ps-digits/main.js

const enDigits = '0123456789'.split('');
const psDigits = '۰۱۲۳۴۵۶۷۸۹'.split('');

function en2ps(value) {
    let result = '';

    for (let digit of new String(value)) {
        if (enDigits.indexOf(digit) >= 0) {
            result += psDigits[enDigits.indexOf(digit)];
            continue;
        }

        result += digit;
    }

    return result;
}

function ps2en(value) {
    let result = '';

    for (let digit of new String(value)) {
        if (psDigits.indexOf(digit) >= 0) {
            result += enDigits[psDigits.indexOf(digit)];
            continue;
        }

        result += digit;
    }

    return result;
}

// console.log( en2ps('48573') );
// console.log( en2ps('A5 B12') );
// console.log( ps2en('۴۸۵۸۹') );

// exports = {en2ps, ps2en};
module.exports = {en2ps, ps2en};