/* @ngInject */
export function lowercase() {
  return {
    require: 'ngModel',
    link: function(scope, element, attrs, modelCtrl) {
      var lowercase = function(inputValue) {
        if (inputValue === undefined) inputValue = '';
        var lowercased = inputValue.toLowerCase();
        if (lowercased !== inputValue) {
          modelCtrl.$setViewValue(lowercased);
          modelCtrl.$render();
        }
        return lowercased;
      };
      modelCtrl.$parsers.push(lowercase);
      lowercase(scope[attrs.ngModel]);
    }
  };
}