Creating the timer system

sources/Runner/Runner.cpp

@@ -11,6 +11,7 @@
 #include <Model/Model.hpp>
 #include <Drawables/2D/Rectangle.hpp>
 #include <TraceLog.hpp>
+#include "System/Timer/TimerSystem.hpp"
 #include "Component/BombHolder/BombHolderComponent.hpp"
 #include "System/BombHolder/BombHolderSystem.hpp"
 #include "System/Renderer/Renderer3DSystem.hpp"
@@ -42,7 +43,8 @@ namespace BBM
 
 	void addSystems(WAL::Wal &wal)
 	{
-		wal.addSystem<KeyboardSystem>()
+		wal.addSystem<TimerSystem>()
+			.addSystem<KeyboardSystem>()
 		    .addSystem<GamepadSystem>()
 			.addSystem<ControllableSystem>()
 			.addSystem<BombHolderSystem>(wal)

sources/System/Timer/TimerSystem.cpp

@@ -0,0 +1,27 @@
+//
+// Created by Zoe Roux on 5/31/21.
+//
+
+#include "TimerSystem.hpp"
+#include "Component/Timer/TimerComponent.hpp"
+
+using namespace std::chrono_literals;
+
+namespace BBM
+{
+	TimerSystem::TimerSystem()
+		: WAL::System({
+			typeid(TimerComponent)
+		})
+	{}
+
+	void TimerSystem::onUpdate(WAL::Entity &entity, std::chrono::nanoseconds dtime)
+	{
+		auto &timer = entity.getComponent<TimerComponent>();
+		timer.ringIn -= dtime;
+		if (timer.ringIn <= 0ns) {
+			timer.setDisable(true);
+			timer.callback(entity);
+		}
+	}
+}

sources/System/Timer/TimerSystem.hpp

@@ -0,0 +1,26 @@
+//
+// Created by Zoe Roux on 5/31/21.
+//
+
+#pragma once
+
+#include <System/System.hpp>
+
+namespace BBM
+{
+	class TimerSystem : public WAL::System
+	{
+	public:
+		//! @inherit
+		void onUpdate(WAL::Entity &entity, std::chrono::nanoseconds dtime) override;
+
+		//! @brief A default constructor
+		TimerSystem();
+		//! @brief A timer system is copy constructable.
+		TimerSystem(const TimerSystem &) = default;
+		//! @brief A default destructor
+		~TimerSystem() override = default;
+		//! @breief A timer system is assignable.
+		TimerSystem &operator=(const TimerSystem &) = default;
+	};
+}