Added JSON

Esiur/Data/ResourceJsonConverter.cs

@@ -0,0 +1,91 @@
+using Esiur.Resource;
+/*
+ 
+Copyright (c) 2017-2021 Ahmed Kh. Zamil
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.
+
+*/
+
+using System;
+using System.Collections.Generic;
+using System.Text;
+using System.Text.Json;
+using System.Text.Json.Serialization;
+
+namespace Esiur.Data
+{
+    class ResourceJsonConverter : JsonConverter<IResource>
+    {
+        public override IResource Read(
+            ref Utf8JsonReader reader,
+            Type typeToConvert,
+            JsonSerializerOptions options)
+        {
+            return (IResource)JsonSerializer.Deserialize(ref reader,typeof(IResource), options);
+        }
+
+
+        public override void Write(
+            Utf8JsonWriter writer,
+            IResource resource,
+            JsonSerializerOptions options)
+        {
+
+            writer.WriteStartObject();
+
+            foreach (var pt in resource.Instance.Template.Properties)
+            {
+                var rt = pt.Info.GetValue(resource, null);
+                writer.WritePropertyName(options.PropertyNamingPolicy?.ConvertName(pt.Name) ?? pt.Name);
+                JsonSerializer.Serialize(writer, rt, options);
+            }
+
+            writer.WriteEndObject();
+
+        }
+    }
+
+
+    public class DoubleJsonConverter : JsonConverter<double>
+    {
+        public override double Read(ref Utf8JsonReader reader, Type typeToConvert, JsonSerializerOptions options)
+        {
+            if (reader.TokenType == JsonTokenType.String && reader.GetString() == "NaN")
+            {
+                return double.NaN;
+            }
+
+            return reader.GetDouble(); // JsonException thrown if reader.TokenType != JsonTokenType.Number
+        }
+
+        public override void Write(Utf8JsonWriter writer, double value, JsonSerializerOptions options)
+        {
+            if (double.IsNaN(value))
+            {
+                writer.WriteStringValue("NaN");
+            }
+            else
+            {
+                writer.WriteNumberValue(value);
+            }
+        }
+    }
+
+}