Add healthSystem

The component doesn't disable the entity anymore, the system does it by checking the component of the entity

Co-Authored-By: Benjamin HENRY <44569175+EternalRat@users.noreply.github.com>

sources/Component/Health/HealthComponent.cpp

@@ -32,8 +32,7 @@ namespace BBM
 	{
 		if (damage >= this->_healthPoint) {
 			this->_healthPoint = 0;
-			this->die();
-		} else
+ 		} else
 			this->_healthPoint -= damage;
 	}
 

sources/Component/Health/HealthComponent.hpp

@@ -45,5 +45,7 @@ namespace BBM
 
 			//! @brief A component can't be assigned
 			HealthComponent &operator=(const HealthComponent &) = delete;
+
+			friend class HealthSystem;
 	};
 }

sources/System/Health/HealthSystem.cpp

@@ -0,0 +1,25 @@
+//
+// Created by Tom Augier on 2021-05-20.
+// Edited by Benjamin Henry on 2021-05-20.
+//
+
+#include "HealthSystem.hpp"
+#include "sources/Component/Health/HealthComponent.hpp"
+#include "sources/Component/Controllable/ControllableComponent.hpp"
+#include "lib/wal/sources/Entity/Entity.hpp"
+
+namespace BBM
+{
+	const std::type_info &HealthSystem::getComponent() const
+	{
+		return typeid(HealthComponent);
+	}
+
+	void HealthSystem::onFixedUpdate(WAL::Entity &entity)
+	{
+		auto &health = entity.getComponent<HealthComponent>();
+
+		if (health._healthPoint == 0);
+			health.die();
+	}
+}

sources/System/Health/HealthSystem.hpp

@@ -0,0 +1,30 @@
+//
+// Created by Tom Augier on 2021-05-20.
+// Edited by Benjamin Henry on 2021-05-20.
+//
+
+#pragma once
+
+#include "lib/wal/sources/System/System.hpp"
+
+namespace BBM
+{
+	//! @brief A system to handle Health entities.
+	class HealthSystem : public WAL::System
+	{
+	public:
+		//! @inherit
+		const std::type_info &getComponent() const override;
+		//! @inherit
+		void onFixedUpdate(WAL::Entity &entity) override;
+
+		//! @brief A default constructor
+		HealthSystem() = default;
+		//! @brief A Health system is copy constructable
+		HealthSystem(const HealthSystem &) = default;
+		//! @brief A default destructor
+		~HealthSystem() override = default;
+		//! @brief A Health system is assignable.
+		HealthSystem &operator=(const HealthSystem &) = default;
+	};
+}