From 8f7192f1a04324f51bb507ab42aa6d18edb55be3 Mon Sep 17 00:00:00 2001
From: Ricardo Antunes <me@riscadoa.com>
Date: Sat, 7 Oct 2023 15:55:04 +0100
Subject: [PATCH] feat(ecs): implement reflection for Entity

---
 core/include/cubos/core/ecs/entity/entity.hpp |  4 ++++
 core/src/cubos/core/ecs/entity/entity.cpp     | 18 ++++++++++++++++++
 2 files changed, 22 insertions(+)

diff --git a/core/include/cubos/core/ecs/entity/entity.hpp b/core/include/cubos/core/ecs/entity/entity.hpp
index 7726166cf..8f3de15d9 100644
--- a/core/include/cubos/core/ecs/entity/entity.hpp
+++ b/core/include/cubos/core/ecs/entity/entity.hpp
@@ -7,6 +7,8 @@
 #include <bitset>
 #include <cstdint>
 
+#include <cubos/core/reflection/reflect.hpp>
+
 namespace cubos::core::ecs
 {
     /// @brief Identifies an entity.
@@ -19,6 +21,8 @@ namespace cubos::core::ecs
     /// @ingroup core-ecs-entity
     struct Entity
     {
+        CUBOS_REFLECT;
+
         /// @brief Type used to store which components an entity has.
         using Mask = std::bitset<CUBOS_CORE_ECS_MAX_COMPONENTS + 1>;
 
diff --git a/core/src/cubos/core/ecs/entity/entity.cpp b/core/src/cubos/core/ecs/entity/entity.cpp
index c787c0bf0..bafeb63b8 100644
--- a/core/src/cubos/core/ecs/entity/entity.cpp
+++ b/core/src/cubos/core/ecs/entity/entity.cpp
@@ -3,9 +3,27 @@
 #include <cubos/core/data/old/serializer.hpp>
 #include <cubos/core/ecs/entity/entity.hpp>
 #include <cubos/core/ecs/entity/hash.hpp>
+#include <cubos/core/reflection/external/primitives.hpp>
+#include <cubos/core/reflection/traits/constructible.hpp>
+#include <cubos/core/reflection/traits/fields.hpp>
+#include <cubos/core/reflection/type.hpp>
 
 using cubos::core::ecs::Entity;
 using cubos::core::ecs::EntityHash;
+using cubos::core::reflection::ConstructibleTrait;
+using cubos::core::reflection::FieldsTrait;
+using cubos::core::reflection::Type;
+
+CUBOS_REFLECT_IMPL(Entity)
+{
+    return Type::create("cubos::core::ecs::Entity")
+        .with(ConstructibleTrait::typed<Entity>()
+                  .withCopyConstructor()
+                  .withMoveConstructor()
+                  .withDefaultConstructor()
+                  .build())
+        .with(FieldsTrait().withField("index", &Entity::index).withField("generation", &Entity::generation));
+}
 
 template <>
 void cubos::core::data::old::serialize<Entity>(Serializer& ser, const Entity& obj, const char* name)