Alarm system overhaul

code/controllers/subsystem/alarms.dm

@@ -0,0 +1,30 @@
+// We manually initialize the alarm handlers instead of looping over all existing types
+// to make it possible to write: camera.triggerAlarm() rather than alarm_manager.managers[datum/alarm_handler/camera].triggerAlarm() or a variant thereof.
+/var/global/datum/alarm_handler/atmosphere/atmosphere_alarm	= new()
+/var/global/datum/alarm_handler/camera/camera_alarm			= new()
+/var/global/datum/alarm_handler/fire/fire_alarm				= new()
+/var/global/datum/alarm_handler/motion/motion_alarm			= new()
+/var/global/datum/alarm_handler/power/power_alarm			= new()
+
+/datum/subsystem/alarm
+	name = "Alarm"
+	var/list/datum/alarm/all_handlers
+
+/datum/subsystem/alarm/New()
+	all_handlers = list(atmosphere_alarm, camera_alarm, fire_alarm, motion_alarm, power_alarm)
+
+/datum/subsystem/alarm/fire()
+	for(var/datum/alarm_handler/AH in all_handlers)
+		AH.process()
+
+/datum/subsystem/alarm/proc/active_alarms()
+	var/list/all_alarms = new
+	for(var/datum/alarm_handler/AH in all_handlers)
+		var/list/alarms = AH.alarms
+		all_alarms += alarms
+
+	return all_alarms
+
+/datum/subsystem/alarm/proc/number_of_active_alarms()
+	var/list/alarms = active_alarms()
+	return alarms.len