Timer.hpp

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#ifndef ECSTASY_SYSTEM_TIMER_HPP_
#define ECSTASY_SYSTEM_TIMER_HPP_
 
#include <chrono>
#include <cstdint>
#include <ctime>
 
namespace ecstasy
{
    class Registry;
 
    class Timer {
      public:
        using TimePoint = std::chrono::time_point<std::chrono::system_clock>;
        using Interval = std::chrono::milliseconds;
 
      private:
        struct TimeInterval {
            Interval interval;
        };
 
        struct Rate {
            std::uint32_t rate;
            std::uint32_t triggerCountdown;
        };
 
      public:
        enum class Type {
            TimeInterval, 
            Rate,         
        };
 
        Timer();
 
        Timer(Interval interval);
 
        Timer(std::uint32_t rate);
 
        Timer(const Timer &) = default;
 
        Timer(Timer &&) = default;
 
        ~Timer() = default;
 
        Timer &operator=(const Timer &) = default;
 
        Timer &operator=(Timer &&) = default;
 
        [[nodiscard]] constexpr Type getType() const noexcept
        {
            return _type;
        }
 
        [[nodiscard]] constexpr TimePoint getLastTrigger() const noexcept
        {
            return _lastTrigger;
        }
 
        void setRate(std::uint32_t rate) noexcept;
 
        [[nodiscard]] std::uint32_t getRate() const;
 
        void setInterval(Interval interval) noexcept;
 
        [[nodiscard]] Interval getInterval() const;
 
        [[nodiscard]] bool trigger() noexcept;
 
      private:
        Type _type;
        TimePoint _lastTrigger;
        union {
            TimeInterval _timer;
            Rate _rate;
        };
    };
} // namespace ecstasy
 
#endif /* !ECSTASY_SYSTEM_TIMER_HPP_ */