var _onProgress = function(bytesUploaded) {
  percentage = (bytesUploaded / $scope.file.size * 100).toFixed(2);
  $scope.file.progress = percentage
};

var _onError = function(error) {
  $scope.file.status = 'failed: ' + error;
};

var _onDone = function() {
  $scope.file.status = 'uploaded';
};

var uploader = new BasicTUS.Client($scope.file, options);
uploader.then(_onDone, _onError, _onProgress);