EventListener.hpp

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//
//  CeresEngine - A game development framework
//
//  Created by Rogiel Sulzbach.
//  Copyright (c) 2018-2022 Rogiel Sulzbach. All rights reserved.
//
 
#pragma once
 
#include "Forward.hpp"
 
#include "Event.hpp"
 
#include "CeresEngine/Macros.hpp"
 
#include "CeresEngine/Foundation/Event.hpp"
 
namespace CeresEngine {
 
    template<CEntityEvent Event> class EntityEventListener {
        static_assert(isEntityEvent<Event>, "Event must be a event type");
 
    private:
        EventConnection mConnection;
 
        virtual void when(Entity& entity, const Event& event) = 0;
 
    protected:
        virtual ~EntityEventListener() = default;
 
    public:
        void subscribe(EntityEventManager& eventManager);
 
        void unsubscribe();
    };
 
} // namespace CeresEngine
 
#include "EventManager.hpp"
 
namespace CeresEngine {
 
    template<CEntityEvent Event> void EntityEventListener<Event>::subscribe(EntityEventManager& eventManager) {
        mConnection = eventManager.subscribe<Event>([this](Entity entity, const Event& event) { when(entity, event); });
    }
 
    template<CEntityEvent Event> void EntityEventListener<Event>::unsubscribe() { mConnection.disconnect(); }
 
} // namespace CeresEngine