chore: experimentations

Engine.Serialization/Converters/EntityConverter.cs

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+using System.Collections;
+using System.Reflection;
+using Syntriax.Engine.Core;
+using Syntriax.Engine.Core.Factory;
+
+using YamlDotNet.Core;
+using YamlDotNet.Core.Events;
+using YamlDotNet.Serialization;
+
+namespace Syntriax.Engine.Serialization;
+
+public class EntityConverter(IReadOnlyDictionary<string, IEntity> entities) : IYamlTypeConverter
+{
+    private readonly IReadOnlyDictionary<string, IEntity> Entities = entities;
+    private readonly HashSet<IEntity> entitiesVisited = [];
+
+    public bool Accepts(Type type) => typeof(IEntity).IsAssignableFrom(type);
+
+    public object? ReadYaml(IParser parser, Type type, ObjectDeserializer rootDeserializer)
+    {
+        parser.Consume<MappingStart>();
+
+        TypeContainer typeContainer = (TypeContainer)rootDeserializer(typeof(TypeContainer))!;
+
+        object instance = TypeFactory.Get(typeContainer.Type);
+
+        while (!parser.TryConsume<MappingEnd>(out _))
+        {
+            string key = parser.Consume<Scalar>().Value;
+
+            if (type.GetField(key, BindingFlags.Instance | BindingFlags.NonPublic) is FieldInfo fieldInfo)
+            {
+                object? fieldValue = rootDeserializer(fieldInfo.FieldType);
+                fieldInfo.SetValue(instance, fieldValue);
+            }
+            else if (type.GetProperty(key) is PropertyInfo propertyInfo)
+            {
+                object? propertyValue = rootDeserializer(propertyInfo.PropertyType);
+                propertyInfo.SetValue(instance, propertyValue);
+            }
+            else
+                parser.SkipThisAndNestedEvents();
+        }
+
+        parser.TryConsume<MappingEnd>(out _);
+
+        return instance;
+    }
+
+    public void WriteYaml(IEmitter emitter, object? value, Type type, ObjectSerializer serializer)
+    {
+        if (type.HasAttribute<IgnoreSerializationAttribute>())
+        {
+            emitter.Emit(new Scalar(""));
+            return;
+        }
+
+        IEntity entity = (IEntity)value!;
+        if (!entitiesVisited.Add(entity))
+        {
+            emitter.Emit(new Scalar(entity.Id));
+            return;
+        }
+
+        emitter.Emit(new MappingStart());
+        serializer(new TypeContainer(value), typeof(TypeContainer));
+
+        TypeData typeData = Utils.GetTypeData(type);
+
+        foreach (PropertyInfo propertyInfo in typeData.Properties)
+        {
+            if (propertyInfo.HasAttribute<IgnoreSerializationAttribute>())
+                continue;
+
+            emitter.Emit(new Scalar(propertyInfo.Name));
+            object? propertyValue = propertyInfo.GetValue(value);
+
+            EmitValue(propertyValue, propertyInfo.PropertyType, emitter, serializer);
+        }
+
+        foreach (FieldInfo fieldInfo in typeData.Fields)
+        {
+            if (fieldInfo.HasAttribute<System.Runtime.CompilerServices.CompilerGeneratedAttribute>())
+                continue;
+
+            if (fieldInfo.HasAttribute<IgnoreSerializationAttribute>())
+                continue;
+
+            // if (!fieldInfo.HasAttribute<SerializeAttribute>())
+            //     continue;
+
+            emitter.Emit(new Scalar(fieldInfo.Name));
+            object? fieldValue = fieldInfo.GetValue(value);
+
+            EmitValue(fieldValue, fieldInfo.FieldType, emitter, serializer);
+        }
+
+        emitter.Emit(new MappingEnd());
+    }
+
+    private static void EmitValue(object? value, Type declaredType, IEmitter emitter, ObjectSerializer serializer)
+    {
+        if (value is null)
+        {
+            emitter.Emit(new Scalar(""));
+            return;
+        }
+
+        if (value is IEntity entity)
+        {
+            emitter.Emit(new Scalar(entity.Id));
+            return;
+        }
+
+        bool isSequence = Utils.IsEnumerable(declaredType);
+
+        if (!isSequence)
+        {
+            serializer(value);
+            return;
+        }
+
+        IEnumerable sequence = (IEnumerable)value;
+
+        emitter.Emit(new SequenceStart(null, null, false, SequenceStyle.Block));
+        foreach (object? item in sequence)
+            if (value is IEntity sequenceEntity)
+                emitter.Emit(new Scalar(sequenceEntity.Id));
+            else
+                serializer(item);
+        emitter.Emit(new SequenceEnd());
+    }
+}