const fs = require('fs');
const path = require('path');

function getFilesFromDir(dir, fileTypes) {
  const filesToReturn = [];
  function walkDir(currentPath) {
    const files = fs.readdirSync(currentPath);
    for (const i in files) {
      const curFile = path.join(currentPath, files[i]);
      if (fs.statSync(curFile).isFile() && fileTypes.indexOf(path.extname(curFile)) != -1) {
        filesToReturn.push(curFile);
      } else if (fs.statSync(curFile).isDirectory()) {
        walkDir(curFile);
      }
    }
  }
  walkDir(dir);
  return filesToReturn;
}

module.exports = getFilesFromDir;