feat: added entity converter

Engine.Serialization/Converters/EntityReferenceConverter.cs

@@ -0,0 +1,36 @@
+using YamlDotNet.Core;
+using YamlDotNet.Core.Events;
+using YamlDotNet.Serialization;
+
+namespace Syntriax.Engine.Serialization;
+
+public class EntityReferenceConverter : IEngineTypeYamlConverter
+{
+    public bool Accepts(Type type) => type == typeof(EntityReference);
+
+    public object? ReadYaml(IParser parser, Type type, ObjectDeserializer rootDeserializer)
+    {
+        parser.Consume<MappingStart>();
+
+        TypeContainer typeContainer = (TypeContainer)rootDeserializer(typeof(TypeContainer))!;
+
+        if (parser.Consume<Scalar>().Value.CompareTo(nameof(EntityReference.Id)) != 0)
+            throw new ArgumentException($"{nameof(EntityReference)} mapping must have an {nameof(EntityReference.Id)}");
+        string id = parser.Consume<Scalar>().Value;
+
+        parser.Consume<MappingEnd>();
+
+        return new EntityReference() { Id = id, TypeContainer = typeContainer };
+    }
+
+    public void WriteYaml(IEmitter emitter, object? value, Type type, ObjectSerializer serializer)
+    {
+        EntityReference? entityReference = (EntityReference)value!;
+
+        emitter.Emit(new MappingStart());
+        serializer(entityReference.TypeContainer, typeof(TypeContainer));
+        emitter.Emit(new Scalar(nameof(EntityReference.Id)));
+        emitter.Emit(new Scalar(entityReference.Id));
+        emitter.Emit(new MappingEnd());
+    }
+}