generate n .xlsx files from a source template using a list of names

generateXlsx.js

var fs = require('fs');
var XLSX = require('xlsx');

console.log('app starting')

const SOURCE = './source/listOfFilesYouWantToGenerate.xlsx';
const QUESTIONS = './source/sourceFileThatNeedsToBeCopiesManyTimes.xlsx';
const TARGET = './vendors';
const sourceFile = XLSX.readFile(SOURCE);

const fileNames = Object.keys(sourceFile.Sheets.Approved)
.filter((key) => doesStringContainCharacter(key, 'D'))
.map(item => {
  let newFileName = sourceFile.Sheets.Approved[item].v;
  newFileName = newFileName.replace(/\./g, '-').toLowerCase()
  newFileName = newFileName.replace('((https://serverless-com/))','')
  return newFileName
})

// TODO check if target directory is empty before copying so you don't fuck up your work
// .map(item => copyFile(item))

function copyFile(name) {
  fs.createReadStream(QUESTIONS).pipe(fs.createWriteStream(TARGET + "/" + name + '.xlsx'));
}

function doesStringContainCharacter(key, char) {
    return key.indexOf(char) > -1
}