Reworking the view

lib/wal/sources/Scene/Scene.hpp

@@ -3,11 +3,11 @@
 //
 
 
-#pragma once
+#ifndef WAL_SCENE
+#define WAL_SCENE
 
 #include <vector>
 #include <functional>
-#include "View/View.hpp"
 #include "Entity/Entity.hpp"
 
 namespace WAL
@@ -18,20 +18,44 @@ namespace WAL
 	private:
 		//! @brief The list of registered entities
 		std::vector<Entity> _entities = {};
-		//! @brief A list of cached views.
-//		std::vector<View> _views = {};
+
+		//! @brief Notify this scene that a component has been added to the given entity.
+		//! @param entity The entity with the new component
+		//! @param type The type of the component added.
+		void _componentAdded(const Entity &entity, std::type_index type);
+		//! @brief Notify this scene that a component has been removed to the given entity.
+		//! @param entity The entity with the removed component
+		//! @param type The type of the component removed.
+		void _componentRemoved(const Entity &entity, std::type_index type);
 	public:
 		//! @brief Get the list of entities.
 		std::vector<Entity> &getEntities();
 
-		//! @brief Add a new entity to the scene, you can use this method with the same arguments as the entity's constructor.
-		//! @return The current scene is returned to allow you to chain call.
-		template <class ...Params>
-		Entity &addEntity(Params &&...params)
+		//! @brief Add a new entity to the scene.
+		//! @param name The name of the created entity.
+		//! @return The created entity is returned.
+		Entity &addEntity(const std::string &name);
+
+		template<typename ...Components>
+		std::vector<std::reference_wrapper<Entity>> &view()
 		{
-			return this->_entities.emplace_back(std::forward<Params>(params)...);
+			return this->view(typeid(Components)...);
 		}
 
+#pragma clang diagnostic push
+#pragma ide diagnostic ignored "NotImplementedFunctions"
+		template<typename ...Components>
+		std::vector<std::reference_wrapper<Entity>> &view(const Components &...index) requires(std::is_same_v<Components...>)
+		{
+			static std::vector<std::reference_wrapper<Entity>> view;
+
+			std::copy_if(this->_entities.begin(), this->_entities.end(), std::back_inserter(view), [&index...](Entity &entity) {
+				return (entity.hasComponent(index) && ...);
+			});
+			return view;
+		}
+#pragma clang diagnostic pop
+
 		//! @brief A default constructor
 		Scene() = default;
 		//! @brief A scene is copy constructable
@@ -41,5 +65,11 @@ namespace WAL
 		//! @brief A scene is assignable
 		Scene &operator=(const Scene &);
 		Scene(Scene &&) = default;
+
+		friend Entity;
 	};
-} // namespace WAL
+} // namespace WAL
+
+#else
+
+#endif