[JS] MASS STRING REPLACER

const fs = require('fs'),
   resolve = require('path').resolve,
   promisify = require('util').promisify,
   readdir = promisify(fs.readdir),
   stat = promisify(fs.stat),
   path = require('path'),
   colors = require('@colors/colors/safe')

Scandir = async (dir) => {
   let subdirs = await readdir(dir)
   let files = await Promise.all(subdirs.map(async (subdir) => {
      let res = resolve(dir, subdir)
      return (await stat(res)).isDirectory() ? Scandir(res) : res
   }))
   return files.reduce((a, f) => a.concat(f), [])
}


Scandir('./').then(files => {
   if (files.length == 0) return console.log(colors.red('Files empty'))
   let old = new Date()
   files.map(v => {
      let str = fs.readFileSync(v, 'utf-8')
         .replace(new RegExp('[OLD_STRING]', 'g'), '[NEW_STRING')
         .replace(new RegExp('[OLD_STRING]', 'g'), 'NEW_STRING')
         // and more ...
      fs.writeFileSync(v, str, 'utf-8')
   })
   let result = `\n${files.map(v => `${colors.cyan('-')} ${colors.yellow(`${v.split('/')[v.split('/').length - 2]}/${v.split('/')[v.split('/').length - 1]}`)}`).join('\n')}\n\n`
   result += colors.green(`✅ ${files.length} files, completed within ${colors.green((new Date - old) * 1)} ms`)
   console.log(result)
})