rename-files.js

const fs = require('fs').promises;

const convertToGropro = (index, id) => {
  return `GH${index.padStart(2,'0')}000${id}`
}

const renameFiles = async (files, filePath, id) => {
  files.sort();
  for (let index = 0; index < files.length; index++) {
    const file = files[index];
    const newName = `${convertToGropro(`${index+1}`, id)}.MP4`;
    console.log(`Renaming ${file} to ${newName}`)
    await fs.rename(`${filePath}/${file}`, `${filePath}/${newName}`)
  }
}

const main = async () => {
  const frontSessions= [...await fs.readdir('./Front')].filter(file => !file.startsWith('.'));
  const backSessions = [...await fs.readdir('./Back')].filter(file => !file.startsWith('.'));

  for (let index = 0; index < frontSessions.length; index++) {
    const sessionFolder = frontSessions[index];
    const folderPath = `./Front/${sessionFolder}`;
    console.log(folderPath)
    const filesInSession = (await fs.readdir(folderPath)).filter(file => !file.startsWith('.'));
    await renameFiles(filesInSession, folderPath, Math.max(index, 1));
  }

  for (let index = 0; index < backSessions.length; index++) {
    const sessionFolder = backSessions[index];
    const folderPath = `./Back/${sessionFolder}`;
    console.log(folderPath)
    const filesInSession = (await fs.readdir(folderPath)).filter(file => !file.startsWith('.'));
    await renameFiles(filesInSession, folderPath, Math.max(index, 1));
  }


}

main();