using System;

using System.Collections;

using System.Collections.Generic;

using System.Linq;

using System.Text;

using System.Runtime.Serialization.Formatters;

using System.IO;

using System.Data;

using System.ComponentModel.DataAnnotations;

using System.Globalization;

using System.Reflection;

using System.Collections.ObjectModel;

​

using Newtonsoft.Json;

using Newtonsoft.Json.Linq;

using Newtonsoft.Json.Converters;

using Newtonsoft.Json.Serialization;    

​

using NUnit.Framework; // Throws NUnit.Framework.AssertionException

​

//https://stackoverflow.com/questions/71529340/custom-jsonconvertor-that-also-serializes-its-value-minus-one-of-its-propertie

​

    public class IgnorePropertiesResolver : DefaultContractResolver

    {

        readonly HashSet<string> propertiesToIgnore;

        readonly HashSet<Type> converterTypesToIgnore;

​

        public IgnorePropertiesResolver(IEnumerable<string> propertiesToIgnore, IEnumerable<Type> converterTypesToIgnore) : base() =>

            (this.propertiesToIgnore, this.converterTypesToIgnore) = 

                ((propertiesToIgnore ?? throw new ArgumentNullException()).ToHashSet(StringComparer.OrdinalIgnoreCase), 

                (converterTypesToIgnore ?? throw new ArgumentNullException()).ToHashSet());

        protected override JsonProperty CreateProperty(MemberInfo member, MemberSerialization memberSerialization)

        {

            var property = base.CreateProperty(member, memberSerialization);

            if (propertiesToIgnore.Contains(member.Name))

                property.Ignored = true;

            if (property.Converter != null && converterTypesToIgnore.Contains(property.Converter.GetType()))

                property.Converter = null;

            return property;

        }

​

        protected override JsonContract CreateContract(Type objectType)

        {

            var contract = base.CreateContract(objectType);

            if (contract.Converter != null && converterTypesToIgnore.Contains(contract.Converter.GetType()))

                contract.Converter = null;

            return contract;

        }

    };

​

    [JsonConverter(typeof(FieldTypeConvertor))]

    public class UmbracoFormFieldDto  {

        public string Id { get; set; }

        public string Condition  { get; set; }

        public string FieldType { get; set; }

        public string Label { get; set; }

        public string Options { get; set; }

    }

​

    public sealed class FieldTypeConvertor : JsonConverter<UmbracoFormFieldDto>

    {

        static readonly IContractResolver innerResolver = new IgnorePropertiesResolver(new [] { "id" }, new [] { typeof(FieldTypeConvertor) })

        {

            NamingStrategy = new CamelCaseNamingStrategy(),

        };

        public override void WriteJson(JsonWriter writer, UmbracoFormFieldDto value, JsonSerializer serializer)

        {

            var props = value.GetType().GetProperties();

            var idProp = props.FirstOrDefault(p => p.Name.Equals("id", StringComparison.OrdinalIgnoreCase));

            var key = idProp.GetValue(value, null).ToString();

​

            writer.WriteStartObject();

            writer.WritePropertyName(key);

            JsonSerializer.CreateDefault(new JsonSerializerSettings { ContractResolver = innerResolver }).Serialize(writer, value);

            writer.WriteEndObject();

        }

​

        public override UmbracoFormFieldDto ReadJson(JsonReader reader, Type objectType, UmbracoFormFieldDto existingValue, bool hasExistingValue, JsonSerializer serializer) => throw new NotImplementedException();

    }

​

    class TestClass

    {

        public static void Test()

        {

            var test = new UmbracoFormFieldDto

            {

                Id = "idValueFromOriginalObj",

                Condition = "propValue",

                FieldType = "propValue",

                Label = "propValue",

                Options = "propValue",

            };

            var json = JsonConvert.SerializeObject(test, Formatting.Indented);

            Console.WriteLine(json);

        }   

    }

​

    public class Program

    {

        public static void Main()

        {

            Console.WriteLine("Environment version: {0} ({1})", System.Runtime.InteropServices.RuntimeInformation.FrameworkDescription , GetNetCoreVersion());

            Console.WriteLine("{0} version: {1}", typeof(JsonSerializer).Assembly.GetName().Name,  typeof(JsonSerializer).Assembly.FullName);

            Console.WriteLine();

​

            try

            {

                TestClass.Test();

            }

            catch (Exception ex)

            {

                Console.WriteLine("Failed with unhandled exception: ");

                Console.WriteLine(ex);

                throw;

            }

        }

        public static string GetNetCoreVersion()

        {

            //https://techblog.dorogin.com/how-to-detect-net-core-version-in-runtime-ecd65ad695be

            //

            var assembly = typeof(System.Runtime.GCSettings).GetTypeInfo().Assembly;

            var assemblyPath = assembly.Location.Split(new[] { '/', '\\' }, StringSplitOptions.RemoveEmptyEntries);

            int netCoreAppIndex = Array.IndexOf(assemblyPath, "Microsoft.NETCore.App");

            if (netCoreAppIndex > 0 && netCoreAppIndex < assemblyPath.Length - 2)

                return assemblyPath[netCoreAppIndex + 1];

            return null;

        }

    }

​