kibana-123/src/ui/public/directives/validate_date_math.js

Kibana is an open source (Apache Licensed), browser based analytics and search dashboard for Elasticsearch. Kibana is a snap to setup and start using. Kibana strives to be easy to get started with, while also being flexible and powerful, just like Elastic

import _ from 'lodash';
import dateMath from '@elastic/datemath';
import uiModules from 'ui/modules';

uiModules.get('kibana').directive('validateDateMath', function () {
  return {
    restrict: 'A',
    require: 'ngModel',
    scope: {
      'ngModel': '='
    },
    link: function ($scope, elem, attr, ngModel) {
      ngModel.$parsers.unshift(validateDateMath);
      ngModel.$formatters.unshift(validateDateMath);

      function validateDateMath(input) {
        if (input == null || input === '') {
          ngModel.$setValidity('validDateMath', true);
          return null;
        }

        let moment = dateMath.parse(input);
        ngModel.$setValidity('validDateMath', moment != null && moment.isValid());
        return input;
      }
    }
  };
});