Merge pull request #31 from dxman/add-color-converter

feat: add Color converter

Author: Joanna May

Chickensoft.Serialization.Godot.Tests/badges/line_coverage.svg

@@ -0,0 +1,42 @@
+namespace Chickensoft.Serialization.Godot.Tests;
+
+using Chickensoft.GoDotTest;
+using System.Text.Json;
+using global::Godot;
+using Shouldly;
+
+public class ColorConverterTest : TestClass {
+  public ColorConverterTest(Node testScene) : base(testScene) { }
+
+  [Test]
+  public void CanConvert() {
+    var converter = new ColorConverter();
+    converter.CanConvert(typeof(Color)).ShouldBeTrue();
+  }
+
+  [Test]
+  public void Converts() {
+    GodotSerialization.Setup();
+
+    var options = new JsonSerializerOptions() {
+      WriteIndented = true,
+      TypeInfoResolver = new SerializableTypeResolver(),
+    };
+
+    var obj = new Color(0xff0000ff);
+    var json = JsonSerializer.Serialize(obj, options);
+
+    json.ShouldBe(
+      /*lang=json*/
+      """
+      {
+        "rgba": "FF0000FF"
+      }
+      """
+    );
+
+    var deserialized = JsonSerializer.Deserialize<Color>(json, options);
+
+    deserialized.ShouldBe(obj);
+  }
+}

Chickensoft.Serialization.Godot.Tests/test/src/ColorConverterTest.cs

@@ -0,0 +1,57 @@
+namespace Chickensoft.Serialization.Godot;
+
+using System;
+using System.Globalization;
+using System.Text.Json;
+using System.Text.Json.Serialization;
+using global::Godot;
+
+/// <summary>Color JSON converter.</summary>
+public class ColorConverter : JsonConverter<Color> {
+  /// <inheritdoc />
+  public override bool CanConvert(Type typeToConvert) =>
+    typeToConvert == typeof(Color);
+
+  /// <inheritdoc />
+  public override Color Read(
+    ref Utf8JsonReader reader,
+    Type typeToConvert,
+    JsonSerializerOptions options
+  ) {
+    var rgba = (uint)0x000000ff;
+
+    while (reader.Read()) {
+      if (reader.TokenType == JsonTokenType.EndObject) {
+        return new Color(rgba);
+      }
+
+      if (reader.TokenType != JsonTokenType.PropertyName) {
+        continue;
+      }
+
+      var propertyName = reader.GetString();
+      reader.Read();
+
+      switch (propertyName) {
+        case "rgba":
+          rgba = uint.Parse(reader.GetString() ?? string.Empty, NumberStyles.HexNumber);
+          break;
+        default:
+          break;
+      }
+    }
+
+    throw new JsonException("Unexpected end when reading Color.");
+  }
+
+  /// <inheritdoc />
+  public override void Write(
+    Utf8JsonWriter writer,
+    Color value,
+    JsonSerializerOptions options
+  ) {
+    writer.WriteStartObject();
+    writer.WriteString("rgba", value.ToRgba32().ToString("X"));
+    writer.WriteEndObject();
+  }
+}

Chickensoft.Serialization.Godot/src/ColorConverter.cs

@@ -18,5 +18,6 @@ public static void Setup() {
     Serializer.AddConverter(new Vector3IConverter());
     Serializer.AddConverter(new BasisConverter());
     Serializer.AddConverter(new Transform3DConverter());
+    Serializer.AddConverter(new ColorConverter());
   }
 }

Chickensoft.Serialization.Godot/src/GodotSerialization.cs

@@ -13,6 +13,7 @@ Please contribute! This only supports the following types:
 - ✅ `Vector3i`
 - ✅ `Basis`
 - ✅ `Transform3D`
+- ✅ `Color`
 
 Be sure to place the following line somewhere before you start serializing/deserializing: