module.exports = function (dir, callback) {

  const fs = require('fs');
  const chokidar = require('chokidar');

  const watcher = chokidar.watch(dir);

  watcher.on('add', function(file) {

    var extencion = file.split('.')[1];

    if (extencion == 'txt') {

      fs.readFile(file, 'utf8', function (err, fileString) {

        callback(fileString);
      });
    }

  });

};