Modular Tablets: Converting PDAs to the NtOS System (SKYRAT VERSION) (#12920)

* hot-patch 1

* hot patch 2

* hot patch 3

* slight issue

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

@@ -0,0 +1,55 @@
+/datum/computer_file/program/status
+	filename = "statusdisplay"
+	filedesc = "Status Display"
+	program_icon = "signal"
+	program_icon_state = "generic"
+	requires_ntnet = TRUE
+	size = 4
+
+	extended_desc = "An app used to change the message on the station status displays."
+	tgui_id = "NtosStatus"
+
+	usage_flags = PROGRAM_ALL
+	available_on_ntnet = FALSE
+
+	var/upper_text
+	var/lower_text
+
+/datum/computer_file/program/status/proc/SendSignal()
+	var/datum/radio_frequency/frequency = SSradio.return_frequency(FREQ_STATUS_DISPLAYS)
+
+	if(!frequency)
+		return
+
+	var/datum/signal/status_signal = new(list("command" = "message"))
+
+	status_signal.data["msg1"] = reject_bad_text(upper_text || "", MAX_STATUS_LINE_LENGTH)
+	status_signal.data["msg2"] = reject_bad_text(lower_text || "", MAX_STATUS_LINE_LENGTH)
+
+	frequency.post_signal(computer, status_signal)
+
+/datum/computer_file/program/status/proc/SetText(position, text)
+	switch(position)
+		if("upper")
+			upper_text = text
+		if("lower")
+			lower_text = text
+
+/datum/computer_file/program/status/ui_act(action, list/params, datum/tgui/ui)
+	. = ..()
+	if(.)
+		return
+
+	switch(action)
+		if("stat_send")
+			SendSignal()
+		if("stat_update")
+			SetText(params["position"], params["text"]) // i hate the player i hate the player
+
+/datum/computer_file/program/status/ui_data(mob/user)
+	var/list/data = get_header_data()
+
+	data["upper"] = upper_text
+	data["lower"] = lower_text
+
+	return data