download-logos.js

const fs = require('fs')
const request = require('request')

const download = (uri, filename, callback) => {
  request.head(uri, (err, res, body) => {
    if (err) throw err
    request(uri).pipe(fs.createWriteStream(filename)).on('close', callback)
  })
}

fs.readFile('data/data.json', 'utf8', (err, data) => {
  if (err) throw err

  const resources = JSON.parse(data).resources

  Object.values(resources).forEach(({ name, image }) => {
    if (image) {
      const extension = image.split('.').pop()
      const normalizedName = name.replace(/\W+/g, '-').toLowerCase()
      const filename = `assets/logos/${normalizedName}.${extension}`

      download(image, filename, () => { console.log('done') })
    }
  })
})