feat: entity finder added

Engine.Serialization/Converters/EntityFinder.cs

@@ -0,0 +1,70 @@
+using System.Collections;
+using System.Reflection;
+
+using Syntriax.Engine.Core;
+
+namespace Syntriax.Engine.Serialization;
+
+public class EntityFinder
+{
+    private readonly HashSet<IEntity> _entities = [];
+
+    public IReadOnlyCollection<IEntity> Entities => _entities;
+
+    public void FindEntitiesUnder(object @object)
+    {
+        TypeData typeData = Utils.GetTypeData(@object.GetType());
+
+        if (@object is IEntity entity)
+        {
+            if (_entities.Add(entity))
+            {
+                Console.WriteLine($"Found Entity: {entity.Id}");
+                FindEntitiesUnder(entity);
+            }
+            else
+            {
+                Console.WriteLine($"Duplicate Entity: {entity.Id}");
+                return;
+            }
+        }
+        else
+        {
+            return;
+        }
+
+        foreach (PropertyInfo propertyInfo in typeData.Properties)
+        {
+            if (propertyInfo.PropertyType?.IsPrimitive ?? true || propertyInfo.PropertyType == typeof(string))
+                continue;
+
+            if (propertyInfo.HasAttribute<IgnoreSerializationAttribute>())
+                continue;
+
+            object? value = propertyInfo.GetValue(@object);
+
+            if (value is IEnumerable enumerable && value.GetType() != typeof(string))
+                foreach (object? listObject in enumerable)
+                    FindEntitiesUnder(listObject);
+
+        }
+
+        foreach (FieldInfo fieldInfo in typeData.Fields)
+        {
+            if (fieldInfo.FieldType?.IsPrimitive ?? true || fieldInfo.FieldType == typeof(string))
+                continue;
+
+            if (fieldInfo.HasAttribute<System.Runtime.CompilerServices.CompilerGeneratedAttribute>())
+                continue;
+
+            // if (!fieldInfo.HasAttribute<SerializeAttribute>())
+            //     continue;
+
+            object? value = fieldInfo.GetValue(@object);
+
+            if (value is IEnumerable enumerable && value.GetType() != typeof(string))
+                foreach (object? listObject in enumerable)
+                    FindEntitiesUnder(listObject);
+        }
+    }
+}