Observer.h

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#ifndef OBSERVER_H
#define OBSERVER_H
 
#include <memory>
#include <list>
 

 
namespace logic {
 
    enum Events { NO_EVENT, GAME_OVER, LEVEL_COMPLETED, DIRECTION_CHANGED, ISMOVING_CHANGED, DEATH, RESPAWN, FRUIT_EATEN, GHOST_EATEN, COIN_EATEN, SCORE_UPDATE, GHOST_FRIGHTENED, GHOST_NORMAL, FRIGHTENED_FLASHING };
 
    class Observer {
    public:
        virtual ~Observer() = default;

        virtual void update(Events event) = 0;
    };
 
 
    class Subject {
    public:
        virtual ~Subject() = default;

        void attach(const std::shared_ptr<Observer> &observer);

        void notify(Events event);
 
    protected:
        std::list<std::weak_ptr<Observer>> observers;
    };
}
 
 
 
#endif //OBSERVER_H