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 Newtonsoft.Json;

using Newtonsoft.Json.Linq;

using Newtonsoft.Json.Converters;

using Newtonsoft.Json.Serialization;    

​

    internal class WhatToMineCalculatorsResponse

    {

        // Should be Dictionary???

        [JsonProperty("coins")]

        public IList<WhatToMineCalculatorResponse> Coins { get; set; }

    }

​

    internal class WhatToMineCalculatorResponse

    {

        readonly string _name;

​

        public WhatToMineCalculatorResponse(string name)

        {

            this._name = name;

        }

​

        // I want the key set in this field

        public string Name { get { return _name; } }

​

        [JsonProperty("id")]

        public int Id { get; set; }

​

        [JsonProperty("tag")]

        public string Symbol { get; set; }

​

        [JsonProperty("status")]

        public string Status { get; set; }

​

        [JsonProperty("algorithm")]

        public string Algo { get; set; }

​

        [JsonProperty("listed")]

        public bool IsListed { get; set; }

    }

​

    internal class WhatToMineCalculatorResponseListConverter : KeyedListToJsonObjectConverterBase<WhatToMineCalculatorResponse>

    {

        protected override string KeyPropertyUnderlyingName // => nameof(WhatToMineCalculatorResponse.Name);

        {

            get { return "Name"; }

        }

    }

​

    public abstract class KeyedListToJsonObjectConverterBase<T> : JsonConverter

    {

        public override bool CanConvert(Type objectType)

        {

            if (objectType.IsArray)

                return false;

            return typeof(IList<T>).IsAssignableFrom(objectType);

        }

​

        protected abstract string KeyPropertyUnderlyingName { get; }

​

        public override object ReadJson(JsonReader reader, Type objectType, object existingValue, JsonSerializer serializer)

        {

            // Get the key property name from the underlying name

            var itemContract = serializer.ContractResolver.ResolveContract(typeof(T)) as JsonObjectContract;

            if (itemContract == null)

                throw new JsonSerializationException(string.Format("type {0} is not serialized as a JSON object"));

            var keyProperty = itemContract.Properties.Where(p => p.UnderlyingName == KeyPropertyUnderlyingName).SingleOrDefault();

            if (keyProperty == null)

                throw new JsonSerializationException(string.Format("Key property {0} not found", KeyPropertyUnderlyingName));

​

            // Validate initial token.

            if (reader.SkipComments().TokenType == JsonToken.Null)

                return null;

            if (reader.TokenType != JsonToken.StartObject)

                throw new JsonSerializationException(string.Format("Unexpected token {0} at {1}", reader.TokenType, reader.Path));

​

            // Allocate the List<T>.  (It might be some subclass of List<T>, so use the default creator.

            var list = existingValue as ICollection<T> ?? (ICollection<T>)serializer.ContractResolver.ResolveContract(objectType).DefaultCreator();

​

            // Process each key/value pair.

            while (reader.Read())

            {

                switch (reader.TokenType)

                {

                    case JsonToken.Comment:

                        break;

                    case JsonToken.EndObject:

                        return list;

                    case JsonToken.PropertyName:

                        {

                            // Get the name.

                            var name = (string)reader.Value;

                            reader.ReadAndAssert();

                            // Load the object

                            var jItem = JObject.Load(reader);

                            // Add the name property

                            jItem.Add(keyProperty.PropertyName, name);

                            // Deserialize the item and add it to the list.

                            list.Add(jItem.ToObject<T>(serializer));

                        }

                        break;

                    default:

                        {

                            throw new JsonSerializationException(string.Format("Unexpected token {0} at {1}", reader.TokenType, reader.Path));

                        }

                }

            }

            // Should not come here.

            throw new JsonSerializationException("Unclosed object at path: " + reader.Path);

        }

​

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

        {

            // Get the key property name from the underlying name

            var itemContract = serializer.ContractResolver.ResolveContract(typeof(T)) as JsonObjectContract;

            if (itemContract == null)

                throw new JsonSerializationException(string.Format("type {0} is not serialized as a JSON object"));

            var keyProperty = itemContract.Properties.Where(p => p.UnderlyingName == KeyPropertyUnderlyingName).SingleOrDefault();

            if (keyProperty == null)

                throw new JsonSerializationException(string.Format("Key property {0} not found", KeyPropertyUnderlyingName));

​

            var converters = serializer.Converters.ToArray();

            var list = (IEnumerable<T>)value;

            writer.WriteStartObject();

            foreach (var item in list)

            {

                var jItem = JObject.FromObject(item, serializer);

                var name = (string)jItem[keyProperty.PropertyName];

                jItem.Remove(keyProperty.PropertyName);

                writer.WritePropertyName(name);

                jItem.WriteTo(writer, converters);

            }

            writer.WriteEndObject();

        }

    }

​

    public static partial class JsonExtensions

    {

        public static JsonReader SkipComments(this JsonReader reader)

        {

            while (reader.TokenType == JsonToken.Comment && reader.Read())

                ;

            return reader;

        }

​

        public static void ReadAndAssert(this JsonReader reader)

        {

            if (reader == null)

                throw new ArgumentNullException();

            if (!reader.Read())

            {

                new JsonReaderException(string.Format("Unexpected end at path {0}", reader.Path));

            }

        }

    }

​

    class TestClass

    {

        public static void Test()

        {

            var responseString = GetJSON();

​

            var settings = new JsonSerializerSettings

            {

                Converters = { new WhatToMineCalculatorResponseListConverter() },

            };

            var root = JsonConvert.DeserializeObject<WhatToMineCalculatorsResponse>(responseString, settings);

​

            var json3 = JsonConvert.SerializeObject(root, Formatting.Indented, settings);

​

            Console.WriteLine("\nDeserialized and re-serialized {0} using WhatToMineCalculatorResponseListConverter when writing:", root);

            Console.WriteLine(json3);

            Assert.IsTrue(JObject.Parse(responseString)["coins"].Children().OfType<JProperty>().Select(p => p.Name)

                .SequenceEqual(JObject.Parse(json3)["coins"].Children().OfType<JProperty>().Select(p => p.Name)));

​

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

​

            Console.WriteLine("\nDeserialized and re-serialized {0} without using WhatToMineCalculatorResponseListConverter when writing:", root);

            Console.WriteLine(json2);

        }

​

        static string GetJSON()

        {

            var json = @"{

    coins: {

        365Coin: {

            id: 74,

            tag: ""365"",

            algorithm: ""Keccak"",

            lagging: true,

            listed: false,

            status: ""No available stats"",

            testing: false

        },

        Aiden: {

            id: 65,

            tag: ""ADN"",

            algorithm: ""Scrypt-OG"",

            lagging: true,

            listed: false,

            status: ""No available stats"",

            testing: false

        },

        Adzcoin: {

            id: 157,

            tag: ""ADZ"",

            algorithm: ""X11"",

            lagging: false,

            listed: false,

            status: ""Active"",

            testing: false

        }

    }

}";

            return json;

        }

    }

​

    public class Program

    {

        public static void Main()

        {

            Console.WriteLine("Environment version: " + Environment.Version);

            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 class AssertionFailedException : System.Exception

    {

        public AssertionFailedException() : base() { }

​

        public AssertionFailedException(string s) : base(s) { }

    }

​

    public static class Assert

    {

        public static void IsTrue(bool value)

        {

            IsTrue(value, "failed");

        }

​

        public static void IsTrue(bool value, string message)

        {

            if (value == false)

                throw new AssertionFailedException(message ?? "failed");

        }

    }

​