Preserve approved pixel tower prototype as development baseline

autoload/game_clock.gd

@@ -0,0 +1,40 @@
+extends SimulationKernel
+
+signal phase_changed(phase: Phase)
+
+enum Phase {
+	MORNING,
+	DAY,
+	EVENING,
+	NIGHT,
+}
+
+var _phase := Phase.MORNING
+
+func _ready() -> void:
+	_phase = get_phase()
+	super._ready()
+
+func reset(start_day := 1, start_hour := 6, start_minute := 0) -> void:
+	super.reset(start_day, start_hour, start_minute)
+	_phase = get_phase()
+
+func advance_one_minute() -> void:
+	super.advance_one_minute()
+	var next_phase := get_phase()
+	if next_phase != _phase:
+		_phase = next_phase
+		phase_changed.emit(_phase)
+
+func get_phase() -> Phase:
+	var hour := get_hour()
+	if hour >= 6 and hour < 10:
+		return Phase.MORNING
+	if hour >= 10 and hour < 16:
+		return Phase.DAY
+	if hour >= 16 and hour < 20:
+		return Phase.EVENING
+	return Phase.NIGHT
+
+func formatted_time() -> String:
+	return "Day %d  %02d:%02d" % [day, get_hour(), get_minute()]