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 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/58477749/json-deserialize-mapping-array-to-their-own-property

​

    public class Product

    {

        [JsonProperty("id")]

        public long Id { get; set; }

​

        [JsonProperty("sku")]

        public string SKU { get; set; }

​

        [JsonProperty("name")]

        public string Name { get; set; }

​

        [JsonProperty("ship_length")]

        public decimal ShipLength { get; set; }

​

        [JsonProperty("ship_width")]

        public decimal ShipWidth { get; set; }

​

        [JsonProperty("ship_height")]

        public decimal ShipHeight { get; set; }

    }

​

    public class CustomAttributeObjectConverter<T> : JsonConverter<T> where T : new()

    {

        public override T ReadJson(JsonReader reader, Type objectType, T existingValue, bool hasExistingValue, JsonSerializer serializer)

        {

            var obj = JToken.Load(reader).ToJTokenType<JObject>();

            if (obj == null)

                return (T)(object)null;

            var attributes = obj["custom_attributes"].RemoveFromLowestPossibleParent().ToJTokenType<JObject>();

            if (attributes != null)

            {

                foreach (var item in attributes.PropertyValues().OfType<JObject>())

                {

                    var name = (string)item["attribute_code"];

                    if (name != null)

                        obj.Add(name, item["value"]);

                }

            }

            if (!hasExistingValue)

                existingValue = (T)serializer.ContractResolver.ResolveContract(objectType).DefaultCreator();

            using (var tokenReader = obj.CreateReader())

                serializer.Populate(tokenReader, existingValue);

            return existingValue;

        }

​

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

        {

            throw new NotImplementedException();

        }

​

        public override bool CanWrite { get { return false; } }

    }

​

    public static partial class JsonExtensions

    {

        public static TJToken ToJTokenType<TJToken>(this JToken item) where TJToken : JToken

        {

            var result = item as TJToken;

            if (item != null)

                return result;

            if (item == null || item.Type == JTokenType.Null)

                return null;

            throw new JsonException(string.Format("Cannot cast {0} to {1}", item.Type, typeof(TJToken)));

        }

        public static JToken RemoveFromLowestPossibleParent(this JToken node)

        {

            if (node == null)

                return null;

            // If the parent is a JProperty, remove that instead of the token itself.

            var contained = node.Parent is JProperty ? node.Parent : node;

            contained.Remove();

            // Also detach the node from its immediate containing property -- Remove() does not do this even though it seems like it should

            if (contained is JProperty)

                ((JProperty)node.Parent).Value = null;

            return node;

        }

    }

​

    class TestClass

    {

        public static void Test()

        {

            var json = GetJson();

            var settings = new JsonSerializerSettings

            {

                Converters = { new CustomAttributeObjectConverter<Product>() },

            };

            var product = JsonConvert.DeserializeObject<Product>(json, settings);

            var json2 = JsonConvert.SerializeObject(product, Formatting.Indented, settings);

            Console.WriteLine(json2);

            Assert.IsTrue(product.ShipLength == (decimal)JToken.Parse(json).SelectToken("..custom_attributes..[?(@.attribute_code == 'ship_length')].value"));

            Assert.IsTrue(product.ShipHeight == (decimal)JToken.Parse(json).SelectToken("..custom_attributes..[?(@.attribute_code == 'ship_height')].value"));

            Assert.IsTrue(product.ShipWidth == (decimal)JToken.Parse(json).SelectToken("..custom_attributes..[?(@.attribute_code == 'ship_width')].value"));

        }   

        static string GetJson()

        {

            var json = @"{

   ""id"":121,

   ""sku"":""008MBLU"",

   ""name"":""Pillow Covers - King Mauve (2-pack)"",

   ""custom_attributes"":{

      ""11"":{

         ""attribute_code"":""ship_length"",

         ""value"":""11.0000""

      },

      ""16"":{

         ""attribute_code"":""ship_width"",

         ""value"":""7.0000""

      },

      ""19"":{

         ""attribute_code"":""ship_height"",

         ""value"":""1.0000""

      }

   }

}

";

            return json;

        }

    }

​

​

    public class Program

    {

        public static void Main()

        {

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

            Console.WriteLine("Json.NET version: " + 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.CodeBase.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;

        }

    }

​