scraper.js

const puppeteer = require('puppeteer');
const PDFDocument = require('pdfkit');
const fs = require('fs');

(async () => {
  const browser = await puppeteer.launch()
  const page = await browser.newPage()
  await page.goto('http://localhost:8080')
  // await page.screenshot({path: 'screenshots/example.png'})

  let entries = await page.evaluate(
    () => Array.from(document.querySelectorAll('tbody tr td')).map((entry) => entry.innerText)
  )
  
  let clients  = new Array()
  let amounts  = new Array()
  let dueDates = new Array()
  let VATs     = new Array()
  
  let x = 1
  for (let i = 0; i < entries.length; i++) {
    let entry = entries[i]
    if (x === 5) x = 1
    if (x === 1) clients.push(entry)
    if (x === 2) amounts.push(entry)
    if (x === 3) dueDates.push(entry)
    if (x === 4) VATs.push(entry)
    x++
  }

  for(let i = 0; i < clients.length; i++) {
    let client  = clients[i]
    let amount  = amounts[i]
    let dueDate = dueDates[i]
    let VAT     = VATs[i]
    const doc   = new PDFDocument

    let totalFee = ((parseInt(VAT.replace(/[\W_]+/g,'')) * parseInt(amount)) / 100) + parseInt(amount)

    doc.pipe(fs.createWriteStream(`PDFs/${client}.pdf`))

    doc
      .fontSize(15)
      .text('Account Invoicing Limited.', 100, 100)

    doc
      .fontSize(9)
      .text('You have an invoice that is due soon, please respond immediately.', 100, 125)

    doc
      .fontSize(15)
      .text(`For the attention of: ${client}`, 100, 175)

    doc
      .fontSize(10)
      .text(`Amount Due: £${amount}`, 100, 220)

    doc
      .fontSize(10)
      .text(`VAT Rate: ${VAT}`, 100, 240)

    doc
      .fontSize(12)
      .text(`Total Due: £${totalFee}`, 100, 260)
    
    doc
      .fillColor('red')
      .fontSize(12)
      .text(`Date Due: ${dueDate}`, 100, 280)

    doc
      .fillColor('black')
      .fontSize(7)
      .text(`If you have any issues with this invoice please contact accountant@accountinvoicinglimited.com`, 100, 300)
      

    doc.end()
  }

  await browser.close()
})()