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.Text.Json;

using System.Text.Json.Serialization;

​

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

​

//https://stackoverflow.com/questions/72000907/each-parameter-in-the-deserialization-constructor-on-type-must-bind-to-an-object

​

    public class Repository

    {

        public Repository(string gitDirectory) => this.GitDirectory = new DirectoryInfo(gitDirectory);

        [JsonConstructor]

        public Repository(DirectoryInfo gitDirectory) => this.GitDirectory = gitDirectory ?? throw new ArgumentNullException(nameof(gitDirectory));

​

        [JsonConverter(typeof(DirectoryInfoConverter))]

        public DirectoryInfo GitDirectory { get; }

    }

​

    public class DirectoryInfoConverter : JsonConverter<DirectoryInfo>

    {

        public override DirectoryInfo Read(ref Utf8JsonReader reader, Type typeToConvert, JsonSerializerOptions options) =>

            new DirectoryInfo(reader.GetString());

        public override void Write(Utf8JsonWriter writer, DirectoryInfo value, JsonSerializerOptions options) =>

            writer.WriteStringValue(value.ToString());

    }

​

    public abstract class GitObject

    {

        public Repository Repository { get; set; }

        public abstract string Serialize();

        public abstract void Deserialize(string data);

​

        public class Blob : GitObject

        {

            public string Data { get; set; }

​

            public Blob(Repository repository) => this.Repository = repository ?? throw new ArgumentNullException(nameof(repository));

​

            public static Blob CreateFromDataFile(Repository repository, string dataFileName) =>

                new Blob(repository)

                {

                    Data = File.ReadAllText(dataFileName),

                };

            public static Blob CreateFromDataConents(Repository repository, string data) =>

                new Blob(repository)

                {

                    Data = data,

                };

            public override string Serialize() => JsonSerializer.Serialize(this);

​

            public override void Deserialize(string data)

            {

                // System.Text.Json does not have a Populate() method so we have to do it manually, or via a tool like AutoMapper

                Blob blobData = JsonSerializer.Deserialize<Blob>(data);

                this.Repository = blobData.Repository;

                this.Data = blobData.Data;

            }

        }

    }

​

    class TestClass

    {

        public static void Test()

        {

            var codeFileName = "Question72000907-code.txt";

            File.WriteAllText(codeFileName, GetCode());

            var repository = new Repository(Directory.GetCurrentDirectory());

​

            var file = new FileInfo(Path.Combine(repository.GitDirectory.FullName, codeFileName));

            var firstBlob = GitObject.Blob.CreateFromDataFile(repository, file.FullName);

            var json = firstBlob.Serialize();

​

            var secondBlob = new GitObject.Blob(repository);

            secondBlob.Deserialize(json);           

            var json2 = secondBlob.Serialize();

            Console.WriteLine(json2);

            Assert.AreEqual(json, json2);

            Assert.AreEqual(firstBlob.Data, secondBlob.Data);

            File.Delete(codeFileName);

        }

        static string GetCode() => @"namespace HelloWorld

{

    class Hello {         

        static void Main(string[] args)

        {

            System.Console.WriteLine(""Hello World!"");

        }

    }

}";

    }

​

    public class Program

    {

        public static void Main()

        {

            Console.WriteLine("Environment version: {0} ({1}), {2}", System.Runtime.InteropServices.RuntimeInformation.FrameworkDescription , Environment.Version, Environment.OSVersion);

            Console.WriteLine("System.Text.Json version: " + typeof(JsonSerializer).Assembly.FullName);

            Console.WriteLine();

​

            try

            {

                TestClass.Test();

            }

            catch (Exception ex)

            {

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

                Console.WriteLine(ex);

                throw;

            }

        }

    }

​