EXIF metadata with a Promise

I had occasion to use exiftool recently, but instead of a callback, I'd rather use promises.

This is what I came up with:

const exif = require('exiftool');
const util = require('util');

const exif_metadata = function (data) {
    return new Promise((resolve, reject) => {
        exif.metadata(data, (err, metadata) => {
            if (err) {
                reject(new Error(err));
            } else {
                resolve(metadata);
            }
        });
    });
};

Worked great!

const fs_readFile = util.promisify(fs.readFile);
 
Promise.resolve()
  .then(() => {
    return fs_readFile(path);
  })
  .then(data => {
    return exif_metadata(data);
  })
  .then(metadata => {
    console.log('metadata: %O', metadata);
  })
  .catch(error => {
    res.send(error.toString());
  });