GameClock.hpp

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#pragma once
 
#include <chrono>
#include <optional>
#include <string>
#include <unordered_map>
 
class GameClock {
    public:
    struct Stamp {
        std::chrono::microseconds elapsed;
        double ticks;
    };
 
    explicit GameClock(int freq);
 
    int freq() const { return _freq; }
 
    std::chrono::microseconds elapsed() const;
 
    double ticks() const;
 
    float setFreq(int newFreq);
 
    void recordJoin(const std::string& team);
 
    std::optional<Stamp> joinOf(const std::string& team) const;
 
    private:
    double _ticksSince(std::chrono::steady_clock::time_point from) const;
 
    int _freq;
    std::chrono::steady_clock::time_point _startTime;
    std::chrono::steady_clock::time_point _lastFreqChange;
    double _accumTicks = 0.0;
    std::unordered_map<std::string, Stamp> _joins;
};