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code/modules/modular_computers/file_system/programs/alarm.dm

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+/datum/computer_file/program/alarm_monitor
+	filename = "alarmmonitor"
+	filedesc = "Alarm Monitor"
+	ui_header = "alarm_green.gif"
+	program_icon_state = "alert-green"
+	extended_desc = "This program provides visual interface for station's alarm system."
+	requires_ntnet = 1
+	network_destination = "alarm monitoring network"
+	size = 5
+	tgui_id = "ntos_station_alert"
+	ui_x = 315
+	ui_y = 500
+
+	var/has_alert = 0
+	var/alarms = list("Fire" = list(), "Atmosphere" = list(), "Power" = list())
+
+/datum/computer_file/program/alarm_monitor/process_tick()
+	..()
+
+	if(has_alert)
+		program_icon_state = "alert-red"
+		ui_header = "alarm_red.gif"
+		update_computer_icon()
+	else
+		if(!has_alert)
+			program_icon_state = "alert-green"
+			ui_header = "alarm_green.gif"
+			update_computer_icon()
+	return 1
+
+/datum/computer_file/program/alarm_monitor/ui_data(mob/user)
+	var/list/data = get_header_data()
+
+	data["alarms"] = list()
+	for(var/class in alarms)
+		data["alarms"][class] = list()
+		for(var/area in alarms[class])
+			data["alarms"][class] += area
+
+	return data
+
+/datum/computer_file/program/alarm_monitor/proc/triggerAlarm(class, area/A, O, obj/source)
+	if(is_station_level(source.z))
+		if(!(A.type in GLOB.the_station_areas))
+			return
+	else if(!is_mining_level(source.z) || istype(A, /area/ruin))
+		return
+
+	var/list/L = alarms[class]
+	for(var/I in L)
+		if (I == A.name)
+			var/list/alarm = L[I]
+			var/list/sources = alarm[3]
+			if (!(source in sources))
+				sources += source
+			return 1
+	var/obj/machinery/camera/C = null
+	var/list/CL = null
+	if(O && istype(O, /list))
+		CL = O
+		if (CL.len == 1)
+			C = CL[1]
+	else if(O && istype(O, /obj/machinery/camera))
+		C = O
+	L[A.name] = list(A, (C ? C : O), list(source))
+
+	update_alarm_display()
+
+	return 1
+
+
+/datum/computer_file/program/alarm_monitor/proc/cancelAlarm(class, area/A, obj/origin)
+	var/list/L = alarms[class]
+	var/cleared = 0
+	for (var/I in L)
+		if (I == A.name)
+			var/list/alarm = L[I]
+			var/list/srcs  = alarm[3]
+			if (origin in srcs)
+				srcs -= origin
+			if (srcs.len == 0)
+				cleared = 1
+				L -= I
+
+	update_alarm_display()
+	return !cleared
+
+/datum/computer_file/program/alarm_monitor/proc/update_alarm_display()
+	has_alert = FALSE
+	for(var/cat in alarms)
+		var/list/L = alarms[cat]
+		if(L.len)
+			has_alert = TRUE
+
+/datum/computer_file/program/alarm_monitor/run_program(mob/user)
+	. = ..(user)
+	GLOB.alarmdisplay += src
+
+/datum/computer_file/program/alarm_monitor/kill_program(forced = FALSE)
+	GLOB.alarmdisplay -= src
+	..()