$scope.uploadAvatar = function(image) {
  if (angular.isArray(image)) {
    image = image[0];
  }
  if (image.type !== 'image/png' && image.type !== 'image/jpeg') {
    alert('Only PNG and JPEG are supported');
    return;
  }
  $scope.uploadInProgress = true;
  $scope.uploadProgress = 0;
  return $scope.upload = $upload.upload({
    url: '/api/users/avatar',
    method: 'POST',
    file: image
  }).progress(function(event) {
    return $scope.uploadProgress = Math.floor(event.loaded / event.total);
  }).success(function(data, status, headers, config) {
    $scope.uploadInProgress = false;
    return $scope.uploadedAvatar = JSON.parse(data);
  }).error(function(err) {
    $scope.uploadInProgress = false;
    alert("error");
    return console.log("error: " + (err.message || err));
  });
};