Umbraco: A bridge between RazorDataTypeModelBinding and PropertyEditorValueConverter.

RazorDataTypeModelBindingPropertyEditorValueConverter.cs

using System;
using System.Collections.Generic;
using System.Linq;
using System.Reflection;
using umbraco.MacroEngines;
using Umbraco.Core;
using Umbraco.Core.PropertyEditors;

namespace Our.Umbraco
{
	public class RazorDataTypeModelBindingPropertyEditorValueConverter : IPropertyEditorValueConverter
	{
		private static Dictionary<Tuple<Guid, int>, Type> _razorDataTypeModelTypes = null;
		private IRazorDataTypeModel SelectedModelBinder = null;

		public bool IsConverterFor(Guid propertyEditorId, string docTypeAlias, string propertyTypeAlias)
		{
			if (_razorDataTypeModelTypes == null)
			{
				// dirty, dirty hack!
				var internalProperty = typeof(DynamicNode).GetProperty("RazorDataTypeModelTypes", BindingFlags.Static | BindingFlags.NonPublic);
				if (internalProperty != null)
				{
					_razorDataTypeModelTypes = internalProperty.GetValue(null, null) as Dictionary<Tuple<Guid, int>, Type>;
				}
			}

			if (_razorDataTypeModelTypes != null && _razorDataTypeModelTypes.Any(x => x.Key.Item1.Equals(propertyEditorId)))
			{
				var type = _razorDataTypeModelTypes.FirstOrDefault(x => x.Key.Item1.Equals(propertyEditorId)).Value;
				this.SelectedModelBinder = Activator.CreateInstance(type) as IRazorDataTypeModel;

				return true;
			}

			return false;
		}

		public Attempt<object> ConvertPropertyValue(object value)
		{
			if (value is string)
			{
				var result = default(object);
				if (this.SelectedModelBinder.Init(0, value.ToString(), out result))
				{
					return new Attempt<object>(true, result);
				}
			}

			return new Attempt<object>(false, value);
		}
	}
}