recharge-utils/src/helper.js

A utility package for recharge-related operations and logic

const puppeteer = require("puppeteer-extra");
const StealthPlugin = require('puppeteer-extra-plugin-stealth')
puppeteer.use(StealthPlugin);
// Function to convert HTML to PDF without saving file
// This function will send the PDF directly in the response
/**
 * Converts HTML to PDF using Puppeteer.
 * @param {Object} options - The options for the PDF conversion.
 * @param {string} options.html - The HTML content to convert to PDF.
 * @param {Object} options.res - The response object (e.g., Express response).
 * @param {string} [options.fileName='html_to_pdf'] - The name of the generated PDF file.
 * @param {string} [options.format='A4'] - The format of the PDF ('A4', 'Letter', 'Legal').
 * @param {Object} [options.margin={top: '0.5in', right: '0.5in', bottom: '0.5in', left: '0.5in'}] - The margins for the PDF.
 * @param {boolean} [options.printBackground=true] - Whether to print the background in the PDF.
 * @returns {Promise<void>} - A promise that resolves once the PDF is generated.
 */
const htmlToPdf = async ({html, res, fileName='html_to_pdf', format='A4', margin={top:"0.5in",right:"0.5in",bottom:"0.5in",left:"0.5in"}, printBackground=true}) => {
  const browser = await puppeteer.launch();
  const page = await browser.newPage();
  try {
    await page.setContent(html, { waitUntil: "networkidle0" }); // wait until all network request is done
    const pdf = await page.pdf({
      format: format,
      margin: margin,
      printBackground: printBackground,
    });
    console.log("PDF Generated Successfully!");
    await res.set({
      "Content-Type": "application/pdf",
      "Content-Disposition": `attachment; filename="${fileName}.pdf"`,
      "Content-Length": pdf.length,
    });
    res.send(pdf);
    // if you want to save the file, uncomment the line below
    // return pdfPath
  } catch (err) {
    console.log("Error to generate pdf :" + err);
    res.status(500).send("Something went wrong." + err);
  } finally {
    await browser.close();
  }
};
/**
 * async - [DESCRIPTION]
 * @param {[String]} {url - [DESCRIPTION]
 * @param {[String]} selector } - [DESCRIPTION]
 * @return {[html]} - [DESCRIPTION]
 */
const getPage = async(url) => {
  const browser = await puppeteer.launch({
     headless: true,
  });
  const page = await browser.newPage();
  await page.setUserAgent('Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 Chrome/118.0 Safari/537.36');
  await page.goto(url, { waitUntil: 'domcontentloaded' });
  return {page, browser};
  //   const results = await page.evaluate((selector) => {
  //   const selectData = document.querySelectorAll(selector);
  //     const data = []
  //   selectData.forEach((item) => {
  //    const img = item.querySelector('img').src;
  //   const title = item.querySelector('h5').innerText;
  //   const content = item.querySelector('p').innerText;
  //   if (title && img && content) data.push({ img, title, content });
  //   });
  //   return data;
  // },selector);
  // await browser.close();
  // return results;
}
module.exports = {
  //  html_to_pdf_file, 
  htmlToPdf,
  getPage,
};