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 Newtonsoft.Json.Schema; //https://www.newtonsoft.com/jsonschema/help/html/Introduction.htm

​

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

​

//https://stackoverflow.com/questions/66136063/newtonsoft-json-schema-deserialize-validationerror

//https://stackoverflow.com/questions/62953330/newtonsoft-json-schema-validatior-is-not-validating-json-input-with-a-json-schem

​

    public class ValidationErrorsContractResolver : SelectedPrivateSettersContractResolver

    {

        static readonly string [] validationErrorFields = new [] { "_message", "_extendedMessage" };

        public ValidationErrorsContractResolver() : base(typeof(ValidationError)) { }

        protected override List<MemberInfo> GetSerializableMembers(Type objectType)

        {

            var list = base.GetSerializableMembers(objectType);

            if (typeof(ValidationError).IsAssignableFrom(objectType))

            {

                foreach (var fieldName in validationErrorFields)

                    if (objectType.GetField(fieldName, BindingFlags.Instance | BindingFlags.NonPublic) is var f && f != null)

                        list.Add(f);

            }

            return list;

        }

        protected override JsonProperty CreateProperty(MemberInfo member, MemberSerialization memberSerialization)

        {

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

            if (prop.DeclaringType == typeof(ValidationError))

            {

                if (validationErrorFields.Contains(prop.UnderlyingName))

                {

                    prop.Ignored = false;

                    prop.Readable = prop.Writable = true;

                }

            }

            return prop;

        }

        protected override JsonObjectContract CreateObjectContract(Type objectType)

        {

            var contract = base.CreateObjectContract(objectType);

            if (typeof(ValidationError).IsAssignableFrom(objectType))

            {

                // Ensure _message and _extendedMessage are calculated.

                contract.OnSerializingCallbacks.Add((o, c) => { var m = ((ValidationError)o).Message; });

            }

            return contract;

        }

    }

​

    public class SelectedPrivateSettersContractResolver : DefaultContractResolver

    {

        // Adapted from SisoJsonDefaultContractResolver

        // From this answer https://stackoverflow.com/a/4110232

        // By https://stackoverflow.com/users/169388/daniel

        // To https://stackoverflow.com/questions/4066947/private-setters-in-json-net

        HashSet<Type> privateSetterTypes { get; } = new ();

        public SelectedPrivateSettersContractResolver(params Type [] types) : this((IEnumerable<Type>)types) { }

​

        public SelectedPrivateSettersContractResolver(IEnumerable<Type> types) => 

            privateSetterTypes.UnionWith(types ?? throw new ArgumentNullException());

​

        protected override JsonProperty CreateProperty(MemberInfo member, MemberSerialization memberSerialization)

        {

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

​

            if (!prop.Ignored && prop.Readable && !prop.Writable)

                if (privateSetterTypes.Contains(prop.DeclaringType))            

                    if (member is PropertyInfo property)

                        prop.Writable = property.GetSetMethod(true) != null;

​

            return prop;

        }       

    }

​

    class TestClass

    {

        public static void Test()

        {

            TestSimple();

            TestSchema();

        }

        public static void TestSchema()

        {

            var schemaJson = GetJsonSchema();

​

            var schema = JSchema.Parse(schemaJson);

​

            var model = JObject.Parse(GetJson());

            var valid = model.IsValid(schema, out IList<ValidationError> errors);

            var settings = new JsonSerializerSettings

            {

                ContractResolver = new ValidationErrorsContractResolver(),

            };

            var resultStr = JsonConvert.SerializeObject(errors, Formatting.Indented, settings);

            var ReSerializedResult = JsonConvert.DeserializeObject<List<ValidationError>>(resultStr, settings);

​

            var resultStr2 = JsonConvert.SerializeObject(ReSerializedResult, Formatting.Indented, settings);

            Console.WriteLine(resultStr);

            Console.WriteLine(resultStr2);

            Assert.IsTrue(errors.Select(e => e.SchemaId).SequenceEqual(ReSerializedResult.Select(e => e.SchemaId)));

            Assert.IsTrue(errors.Select(e => e.Message).SequenceEqual(ReSerializedResult.Select(e => e.Message)));

            Assert.AreEqual(resultStr, resultStr2);

        }   

        static void TestSimple()

        {

            var inModel = new Model("my value");

            var settings = new JsonSerializerSettings

            {

                ContractResolver = new SelectedPrivateSettersContractResolver(typeof(Model)),

            };

            var json = JsonConvert.SerializeObject(inModel, settings);

            // Assert Value is not deserialized when there is no custom resolver

            var newModel1 = JsonConvert.DeserializeObject<Model>(json);

            Assert.AreNotEqual(inModel.Value, newModel1.Value);

            // Assert Value is deserialized when there is a custom resolver

            var newModel2 = JsonConvert.DeserializeObject<Model>(json, settings);

            Assert.AreEqual(inModel.Value, newModel2.Value);

        }

        static string GetJsonSchema()

        {

            return @"{

    ""$schema"": ""http://json-schema.org/draft-07/schema#"",

    ""type"": ""object"",

    ""properties"": {

        ""article_metadata"": {

            ""description"": ""article metadata for descrepancy checks"",

            ""type"": ""object"",

            ""properties"": {

                ""authors"": {

                    ""description"": ""authors details"",

                    ""type"": ""object"",

                    ""properties"": {

                        ""list"": {

                            ""type"": ""array"",

                            ""items"": {

                                ""type"": ""object"",

                                ""properties"": {

                                    ""sequence_id"": {

                                        ""type"": ""string""

                                    },

                                    ""guid"": {

                                        ""description"": ""32 digit unique id to identify author"",

                                        ""type"": ""string""

                                    },

                                    ""name"": {

                                        ""type"": ""object"",

                                        ""properties"": {

                                            ""prefix"": {

                                                ""type"": ""string""

                                            },

                                            ""given_name"": {

                                                ""type"": ""array"",

                                                ""minItems"": 1,

                                                ""items"": {

                                                    ""type"": ""string""

                                                }

                                            },

                                            ""family_name"": {

                                                ""type"": ""string""

                                            }

                                        },

                                        ""required"": [

                                            ""family_name"",

                                            ""given_name""

                                        ]

                                    }

                                },

                                ""required"": [

                                    ""sequence_id"",

                                    ""name""

                                ]

                            }

                        }

                    }

                }

            }

        }

    }

}";

        }

        static string GetJson()

        {

            var json = @" {

    ""article_metadata"": {

        ""authors"": {

            ""list"": [{

                    ""sequence_id"": ""Au1"",

                    ""guid"": ""00208406-c337-4f58-9245-9455d8852a00"",

                    ""affiliation_id"": ""Aff1"",

                    ""name"": {

                        ""prefix"": ""Ms."",

                        ""family_name"": ""Hole""

                    }

                }, {

                    ""sequence_id"": ""Au2"",

                    ""guid"": ""32b8a598-2fb5-42f1-ad0e-94ce2fc00a8f"",

                    ""affiliation_id"": ""Aff2"",

                    ""name"": {

                        ""prefix"": ""Mr."",

                        ""given_name"": ""Anurag""

                    }

                }

            ]

        }

    }

}";

            return json;

        }

    }

​

    public class Model

    {

        public Model() { }

        public Model(string value) => this.Value = value;

        public string Value { get; private set; }

    }

​

    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("Json.NET Schema version: " + typeof(Newtonsoft.Json.Schema.JSchema).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;

        }

    }

​