Umbraco MultiNodeTreePicker PropertyEditorValueConverter

MultiNodeTreePickerPropertyEditorValueConverter.cs

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Web;
using Umbraco.Core;
using Umbraco.Core.PropertyEditors;
using Umbraco.Core.Models;
using umbraco.editorControls;
using Umbraco.Web;
using umbraco;

namespace Our.Umbraco.PropertyEditorConverters
{
    // original from : https://bitbucket.org/jeavon/umbraco-core-property-editor-converters/src/b1eb094077362bbbb5d86ff209c024d595b44457/Our.Umbraco.PropertyEditors/MultiNodeTreePickerPropertyEditorValueConverter.cs?at=default
    public class MultiNodeTreePickerPropertyEditorValueConverter : IPropertyEditorValueConverter
    {
        public bool IsConverterFor(Guid propertyEditorId, string docTypeAlias, string propertyTypeAlias)
        {
            return Guid.Parse("7e062c13-7c41-4ad9-b389-41d88aeef87c").Equals(propertyEditorId);
        }
        public Attempt<object> ConvertPropertyValue(object value)
        {
            if (UmbracoContext.Current != null)
            {
                var nodeIds = XmlHelper.CouldItBeXml(value.ToString()) ? 
                    uQuery.GetXmlIds(value.ToString()) : 
                    value.ToString().Split(new string[] { "," }, StringSplitOptions.RemoveEmptyEntries).Select(int.Parse).ToArray();

                if (nodeIds == null || nodeIds.Length == 0)
                {
                    return new Attempt<object>(false, null);
                }

                var umbHelper = new UmbracoHelper(UmbracoContext.Current);

                var multiNodeTreePickerContent = umbHelper.TypedContent(nodeIds).Where(x => x != null) ??
                                                 umbHelper.TypedMedia(nodeIds).Where(x => x != null);

                return new Attempt<object>(multiNodeTreePickerContent != null, multiNodeTreePickerContent);
            }
            else
            {
                return Attempt<object>.False;
            }
        }
    }
}