/***********************************************************************************************************************************************************************
 * File Name: renderTemplate.util.js
 * Type of Program: Utility
 * Description: Plain-text {{placeholder}} substitution — no eval/Function, so
 *              admin-supplied HTML can never execute arbitrary JS. Unknown or
 *              missing keys resolve to an empty string rather than throwing.
 * Author: Kenneth Obsequio (@lash0000)
 * Date Created: Jul. 3, 2026
 ***********************************************************************************************************************************************************************
 * HOW TO USE:
 *   const { renderTemplate } = require('../utils/renderTemplate.util');
 *   renderTemplate('Hi {{name}}', { name: 'Ken' }); // "Hi Ken"
 ***********************************************************************************************************************************************************************/

const renderTemplate = (str, data = {}) =>
  String(str ?? '').replace(/\{\{\s*(\w+)\s*\}\}/g, (_, key) => {
    const val = data[key];
    return (val === undefined || val === null) ? '' : String(val);
  });

module.exports = { renderTemplate };