photo rename

index.js

var path = 'C:\\Users\\Mike\\code\\rename\\*.jpg';

var glob = require("glob")
var fs = require('fs');
var exif = require('exif');
var _ = require('lodash');
var Promise = require('bluebird');
var pathModule = require('path');
var pad = require("node-string-pad");

function createExif(file) {
  return new Promise(function (resolve, reject) {

    var exifImage = new exif.ExifImage({
      image: file
    }, function (error, exifData) {
      if (error) {
        reject(error);
      }

      var intermediate = {
        fullFileName: file,
        exifDateTimeOriginal: exifData.exif.DateTimeOriginal
      };
      resolve(intermediate);
    });
  });
}

glob(path, function (err, files) {

  Promise.map(files, function (file) {
    return createExif(file);
  }).then(function (items) {
    console.log(items);
    var sorted = _.sortBy(items, function(item){
      return item.exifDateTimeOriginal;
    });

    var count = 1;
    _.each(sorted, function(item){
      var prefix = pad(count.toString(), 3, 'LEFT', '0');
      item.newFileName = pathModule.dirname(item.fullFileName) + '/' + prefix + '_' + pathModule.basename(item.fullFileName);
      count++;
    });

    _.each(sorted, function(item){
      fs.renameSync(item.fullFileName, item.newFileName);
    });

    console.log('done. n stuff.');

  });

});