1 files changed, 69 insertions, 0 deletions
diff --git a/src/openvic-simulation/misc/SimulationClock.cpp b/src/openvic-simulation/misc/SimulationClock.cpp
new file mode 100644
index 0000000..324811c
--- /dev/null
+++ b/src/openvic-simulation/misc/SimulationClock.cpp
@@ -0,0 +1,69 @@
+#include "SimulationClock.hpp"
+
+#include <algorithm>
+
+using namespace OpenVic;
+
+SimulationClock::SimulationClock(
+	tick_function_t new_tick_function, update_function_t new_update_function,
+	state_changed_function_t new_state_changed_function
+) : tick_function { new_tick_function ? std::move(new_tick_function) : []() {} },
+	update_function { new_update_function ? std::move(new_update_function) : []() {} },
+	state_changed_function { new_state_changed_function ? std::move(new_state_changed_function) : []() {} } {
+	reset();
+}
+
+void SimulationClock::set_paused(bool new_paused) {
+	if (paused != new_paused) {
+		toggle_paused();
+	}
+}
+
+void SimulationClock::toggle_paused() {
+	paused = !paused;
+	state_changed_function();
+}
+
+void SimulationClock::set_simulation_speed(speed_t speed) {
+	speed = std::clamp(speed, MIN_SPEED, MAX_SPEED);
+	if (current_speed != speed) {
+		current_speed = speed;
+		state_changed_function();
+	}
+}
+
+void SimulationClock::increase_simulation_speed() {
+	set_simulation_speed(current_speed + 1);
+}
+
+void SimulationClock::decrease_simulation_speed() {
+	set_simulation_speed(current_speed - 1);
+}
+
+bool SimulationClock::can_increase_simulation_speed() const {
+	return current_speed < MAX_SPEED;
+}
+
+bool SimulationClock::can_decrease_simulation_speed() const {
+	return current_speed > MIN_SPEED;
+}
+
+void SimulationClock::conditionally_advance_game() {
+	if (!paused) {
+		const time_point_t current_time = std::chrono::high_resolution_clock::now();
+		const std::chrono::milliseconds time_since_last_tick =
+			std::chrono::duration_cast<std::chrono::milliseconds>(current_time - last_tick_time);
+		if (time_since_last_tick >= GAME_SPEEDS[current_speed]) {
+			last_tick_time = current_time;
+			tick_function();
+		}
+	}
+	update_function();
+}
+
+void SimulationClock::reset() {
+	paused = true;
+	current_speed = 0;
+	last_tick_time = std::chrono::high_resolution_clock::now();
+	state_changed_function();
+}