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 System.Runtime.Serialization;

​

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/39461518/c-sharp-json-net-deserialize-response-that-uses-an-unusual-data-structure/

​

    // Related: https://dotnetfiddle.net/9Sw9Sw

​

    // Related: https://dotnetfiddle.net/gBPm2g

​

    public class ObjectToArrayConverter<T> : JsonConverter

    {

        //https://stackoverflow.com/a/39462464/3744182

        public override bool CanConvert(Type objectType)

        {

            return typeof(T) == objectType;

        }

​

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

        {

            var objectType = value.GetType();

            var contract = serializer.ContractResolver.ResolveContract(objectType) as JsonObjectContract;

            if (contract == null)

                throw new JsonSerializationException(string.Format("invalid type {0}.", objectType.FullName));

            writer.WriteStartArray();

            foreach (var property in SerializableProperties(contract))

            {

                var propertyValue = property.ValueProvider.GetValue(value);

                if (property.Converter != null && property.Converter.CanWrite)

                    property.Converter.WriteJson(writer, propertyValue, serializer);

                else

                    serializer.Serialize(writer, propertyValue);

            }

            writer.WriteEndArray();

        }

​

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

        {

            var contract = serializer.ContractResolver.ResolveContract(objectType) as JsonObjectContract;

            if (contract == null)

                throw new JsonSerializationException(string.Format("invalid type {0}.", objectType.FullName));

​

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

                return null;

            if (reader.TokenType != JsonToken.StartArray)

                throw new JsonSerializationException(string.Format("token {0} was not JsonToken.StartArray", reader.TokenType));

​

            // Not implemented: JsonObjectContract.CreatorParameters, serialization callbacks, 

            existingValue = existingValue ?? contract.DefaultCreator();

​

            using (var enumerator = SerializableProperties(contract).GetEnumerator())

            {

                while (true)

                {

                    switch (reader.ReadToContentAndAssert().TokenType)

                    {

                        case JsonToken.EndArray:

                            return existingValue;

​

                        default:

                            if (!enumerator.MoveNext())

                            {

                                reader.Skip();

                                break;

                            }

                            var property = enumerator.Current;

                            object propertyValue;

                            // TODO:

                            // https://www.newtonsoft.com/json/help/html/Properties_T_Newtonsoft_Json_Serialization_JsonProperty.htm

                            // JsonProperty.ItemConverter, ItemIsReference, ItemReferenceLoopHandling, ItemTypeNameHandling, DefaultValue, DefaultValueHandling, ReferenceLoopHandling, Required, TypeNameHandling, ...

                            if (property.Converter != null && property.Converter.CanRead)

                                propertyValue = property.Converter.ReadJson(reader, property.PropertyType, property.ValueProvider.GetValue(existingValue), serializer);

                            else

                                propertyValue = serializer.Deserialize(reader, property.PropertyType);

                            property.ValueProvider.SetValue(existingValue, propertyValue);

                            break;

                    }

                }

            }

        }

​

        static IEnumerable<JsonProperty> SerializableProperties(JsonObjectContract contract)

        {

            return contract.Properties.Where(p => !p.Ignored && p.Readable && p.Writable);

        }

    }

​

    public static partial class JsonExtensions

    {

        public static JsonReader ReadToContentAndAssert(this JsonReader reader)

        {

            return reader.ReadAndAssert().MoveToContentAndAssert();

        }

​

        public static JsonReader MoveToContentAndAssert(this JsonReader reader)

        {

            if (reader == null)

                throw new ArgumentNullException();

            if (reader.TokenType == JsonToken.None)       // Skip past beginning of stream.

                reader.ReadAndAssert();

            while (reader.TokenType == JsonToken.Comment) // Skip past comments.

                reader.ReadAndAssert();

            return reader;

        }

​

        public static JsonReader ReadAndAssert(this JsonReader reader)

        {

            if (reader == null)

                throw new ArgumentNullException();

            if (!reader.Read())

                throw new JsonReaderException("Unexpected end of JSON stream.");

            return reader;

        }

    }

​

    [JsonConverter(typeof(ObjectToArrayConverter<Player>))]

    [DataContract]

    public class Player

    {

        [DataMember(Order = 1)]

        public int UniqueID { get; set; }

        [DataMember(Order = 2)]

        public string PlayerDescription { get; set; }

        // Other fields as required.

​

        public string ShortPlayerDescription { get { return ""; } }

​

        public string IgnoreMe2 { get; set; }

    }

​

    public class ScoreboardResults

    {

        public int timestamp { get; set; }

        public int total_players { get; set; }

        public int max_score { get; set; }

        public Dictionary<string, Player> players { get; set; }

    }

​

    class TestClass

    {

        static string GetJson()

        {

            var json = @"{

    ""timestamp"": 1473730993,

    ""total_players"": 945,

    ""max_score"": 8961474,

    ""players"": {

            ""Player1Username"": [

            121,

            ""somestring"",

            679900,

            5,

            4497,

            ""anotherString"",

            ""thirdString"",

            ""fourthString"",

            123,

            22,

            ""YetAnotherString""],

        ""Player2Username"": [

            886,

            ""stillAstring"",

            1677,

            1,

            9876,

            ""alwaysAstring"",

            ""thirdString"",

            ""fourthString"",

            876,

            77,

            ""string""]

        }

}";

            return json;

        }

​

        internal static void Test()

        {

            var inputJson = GetJson();

​

            Console.WriteLine("Input JSON: ");

            Console.WriteLine(JToken.Parse(inputJson));

            var root = JsonConvert.DeserializeObject<ScoreboardResults>(inputJson);

​

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

​

            Console.WriteLine("\nOutput JSON: ");

            Console.WriteLine(json2);

​

            var root2 = JsonConvert.DeserializeObject<ScoreboardResults>(json2);

​

            var json3 = JsonConvert.SerializeObject(root2, Formatting.Indented);

​

            Assert.IsTrue(json2 == json3);

​

            Assert.IsTrue(JToken.Parse(inputJson)

                          .SelectTokens("players.*")

                          .Cast<JArray>()

                          .Zip(JToken.Parse(json3)

                               .SelectTokens("players.*")

                               .Cast<JArray>(), 

                               (a1, a2) => a1.Count >= a2.Count && a1.Zip(a2, (i1, i2) => JToken.DeepEquals(i1, i2)).All(b => b))

                          .All(b => b));

            // Assert that trying to deserialize truncated files always throws.

            for (int i = 1; i < json3.Length - 1; i++)

            {

                Assert.Throws(Is.InstanceOf(typeof(JsonException)), () => JsonConvert.DeserializeObject<ScoreboardResults>(json3.Substring(i, json3.Length - i)));

            }

        }

    }

​

    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.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;

        }

    }

​