LifetimeComponent.hpp

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/*
 * =====================================================================================
 *
 *       Filename:  LifetimeComponent.hpp
 *
 *    Description:
 *
 *        Created:  19/01/2018 04:13:13
 *
 *         Author:  Quentin Bazin, <quent42340@gmail.com>
 *
 * =====================================================================================
 */
#ifndef GK_LIFETIMECOMPONENT_HPP_
#define GK_LIFETIMECOMPONENT_HPP_

#include <functional>

#include "gk/core/Timer.hpp"
#include "gk/scene/SceneObject.hpp"

namespace gk {

class LifetimeComponent {
    using DeathChecker = std::function<bool(const SceneObject &)>;

    public:
        LifetimeComponent() = default;
        LifetimeComponent(u32 lifetime) : m_lifetime(lifetime) { m_timer.start(); }
        LifetimeComponent(DeathChecker deathChecker) : m_deathChecker(deathChecker) {}

        void kill() { m_dead = true; }

        bool almostDead() { return m_lifetime != 0 && m_timer.time() > m_lifetime / 4 * 3; }

        bool dead(const SceneObject &object) const {
            return m_dead
                || (m_lifetime != 0 && m_timer.time() > m_lifetime)
                || (m_deathChecker && m_deathChecker(object));
        }

        u32 aliveTime() { return m_timer.time(); }

        bool areClientsNotified() const { return m_areClientsNotified; }

        void setDeathChecker(DeathChecker deathChecker) { m_deathChecker = deathChecker; }
        void setClientsNotified(bool areClientsNotified) { m_areClientsNotified = areClientsNotified; }

    private:
        Timer m_timer;

        bool m_dead = false;
        bool m_areClientsNotified = false;

        u32 m_lifetime = 0;

        DeathChecker m_deathChecker;
};

} // namespace gk

#endif // GK_LIFETIMECOMPONENT_HPP_