1 files changed, 72 insertions, 0 deletions
diff --git a/src/openvic2/GameAdvancementHook.cpp b/src/openvic2/GameAdvancementHook.cpp
new file mode 100644
index 0000000..d90b7b1
--- /dev/null
+++ b/src/openvic2/GameAdvancementHook.cpp
@@ -0,0 +1,72 @@
+#include "GameAdvancementHook.hpp"
+
+using namespace OpenVic2;
+
+const std::vector<std::chrono::milliseconds> GameAdvancementHook::GAME_SPEEDS = {
+	std::chrono::milliseconds{ 4000 },
+	std::chrono::milliseconds{ 3000 },
+	std::chrono::milliseconds{ 2000 },
+	std::chrono::milliseconds{ 1000 },
+	std::chrono::milliseconds{ 100 },
+	std::chrono::milliseconds{ 1 } };
+
+GameAdvancementHook::GameAdvancementHook(AdvancementFunction tickFunction, RefreshFunction updateFunction, bool startPaused, speed_t startingSpeed)
+	: triggerFunction{ tickFunction }, refreshFunction{ updateFunction }, isPaused{ startPaused } {
+	lastPolledTime = std::chrono::high_resolution_clock::now();
+	setSimulationSpeed(startingSpeed);
+}
+
+void GameAdvancementHook::setSimulationSpeed(speed_t speed) {
+	if (speed < 0)
+		currentSpeed = 0;
+	else if (speed >= GAME_SPEEDS.size())
+		currentSpeed = GAME_SPEEDS.size() - 1;
+	else
+		currentSpeed = speed;
+}
+
+GameAdvancementHook::speed_t GameAdvancementHook::getSimulationSpeed() const {
+	return currentSpeed;
+}
+
+void GameAdvancementHook::increaseSimulationSpeed() {
+	setSimulationSpeed(currentSpeed + 1);
+}
+
+void GameAdvancementHook::decreaseSimulationSpeed() {
+	setSimulationSpeed(currentSpeed - 1);
+}
+
+bool GameAdvancementHook::canIncreaseSimulationSpeed() const {
+	return currentSpeed + 1 < GAME_SPEEDS.size();
+}
+
+bool GameAdvancementHook::canDecreaseSimulationSpeed() const {
+	return currentSpeed > 0;
+}
+
+GameAdvancementHook& GameAdvancementHook::operator++() {
+	increaseSimulationSpeed();
+	return *this;
+};
+
+GameAdvancementHook& GameAdvancementHook::operator--() {
+	decreaseSimulationSpeed();
+	return *this;
+};
+
+void GameAdvancementHook::conditionallyAdvanceGame() {
+	if (!isPaused) {
+		std::chrono::time_point<std::chrono::high_resolution_clock> currentTime = std::chrono::high_resolution_clock::now();
+		if (std::chrono::duration_cast<std::chrono::milliseconds>(currentTime - lastPolledTime) >= GAME_SPEEDS[currentSpeed]) {
+			lastPolledTime = currentTime;
+			if (triggerFunction) triggerFunction();
+		}
+	}
+	if (refreshFunction) refreshFunction();
+}
+
+void GameAdvancementHook::reset() {
+	isPaused = true;
+	currentSpeed = 0;
+}