payu-websdk/wrapper/initiate.js

PayU WEB SDK for nodejs

const hasher = require('../utils/hasher');
const PayuErrors = require('../Error');
const htmlEncoder = require('../utils/htmlencoder');

/**
 * PayU payment initiate function
 * @param {Object} credes - PayU credentials
 * @param {Object} params - Payment parameters
 * @returns {string} - HTML form with auto-submit
 */
module.exports = function app(credes, params) {
    const hash = hasher.paymentHasher(credes, params);
    params.hash = hash;
    params.key = credes.key;
    
    function inputGen(name, val) {
        const encodedName = htmlEncoder.encodeHTMLAttribute(name);
        let encodedValue;
        
        if (typeof val === 'object') {
            encodedValue = htmlEncoder.encodeJSONForHTML(val);
        } else {
            encodedValue = htmlEncoder.encodeHTMLAttribute(String(val));
        }
        
        return `<input type="hidden" name="${encodedName}" value="${encodedValue}" />`;
    }
    
    const formAction = htmlEncoder.encodeHTMLAttribute(credes.paymentURL);
    const header = `<form name="payment_post" id="payment_post" action="${formAction}" method="post">`;
    const footer = `</form><script type="text/javascript">window.onload=function(){document.forms['payment_post'].submit();};</script>`;
    
    let inputs = header;
    for (let key in params) {
        inputs += inputGen(key, params[key]);
    }
    
    return inputs + footer;
};