1 files changed, 44 insertions, 0 deletions
diff --git a/src/openvic-simulation/GameAdvancementHook.hpp b/src/openvic-simulation/GameAdvancementHook.hpp
new file mode 100644
index 0000000..59e43a4
--- /dev/null
+++ b/src/openvic-simulation/GameAdvancementHook.hpp
@@ -0,0 +1,44 @@
+#pragma once
+
+#include <chrono>
+#include <functional>
+#include <vector>
+
+namespace OpenVic {
+	// Conditionally advances game with provided behaviour
+	// Class governs game speed and pause state
+	class GameAdvancementHook {
+	public:
+		using AdvancementFunction = std::function<void()>;
+		using RefreshFunction = std::function<void()>;
+		using speed_t = int8_t;
+
+		// Minimum number of miliseconds before the simulation advances
+		static const std::vector<std::chrono::milliseconds> GAME_SPEEDS;
+
+	private:
+		using time_point_t = std::chrono::time_point<std::chrono::high_resolution_clock>;
+
+		time_point_t lastPolledTime;
+		// A function pointer that advances the simulation, intended to be a capturing lambda or something similar. May need to be reworked later
+		AdvancementFunction triggerFunction;
+		RefreshFunction refreshFunction;
+		speed_t currentSpeed;
+
+	public:
+		bool isPaused;
+
+		GameAdvancementHook(AdvancementFunction tickFunction, RefreshFunction updateFunction, bool startPaused = true, speed_t startingSpeed = 0);
+
+		void setSimulationSpeed(speed_t speed);
+		speed_t getSimulationSpeed() const;
+		void increaseSimulationSpeed();
+		void decreaseSimulationSpeed();
+		bool canIncreaseSimulationSpeed() const;
+		bool canDecreaseSimulationSpeed() const;
+		GameAdvancementHook& operator++();
+		GameAdvancementHook& operator--();
+		void conditionallyAdvanceGame();
+		void reset();
+	};
+}
+\ No newline at end of file