recursive function

recursive function

import RNFS from 'react-native-fs'

const getFolders = (dir) => {
  return RNFS.readDir(dir).then(
    result => result
      .filter(item => item.isDirectory())
      .map(item => item.path)
  )
}

async function getFoldersRecursive (dir, directories) {
  const subfolders = await getFolders(dir)
  return Promise.all(subfolders.map(folder => {
    directories.push(folder)
    return getFoldersRecursive(folder, directories)
  }))
}