Computer tweaks (#1285)

Pulling in some computer changes from bay.

code/modules/modular_computers/file_system/program.dm

@@ -2,10 +2,12 @@
 /datum/computer_file/program
 	filetype = "PRG"
 	filename = "UnknownProgram"				// File name. FILE NAME MUST BE UNIQUE IF YOU WANT THE PROGRAM TO BE DOWNLOADABLE FROM NTNET!
-	var/required_access = null				// List of required accesses to *run* the program.
+	var/required_access = null				// List of required accesses to run/download the program.
+	var/requires_access_to_run = 1			// Whether the program checks for required_access when run.
+	var/requires_access_to_download = 1		// Whether the program checks for required_access when downloading.
 	var/datum/nano_module/NM = null			// If the program uses NanoModule, put it here and it will be automagically opened. Otherwise implement ui_interact.
 	var/nanomodule_path = null				// Path to nanomodule, make sure to set this if implementing new program.
-	var/running = 0							// Set to 1 when the program is run and back to 0 when it's stopped.
+	var/program_state = PROGRAM_STATE_KILLED// PROGRAM_STATE_KILLED or PROGRAM_STATE_BACKGROUND or PROGRAM_STATE_ACTIVE - specifies whether this program is running.
 	var/obj/item/modular_computer/computer	// Device that runs this program.
 	var/filedesc = "Unknown Program"		// User-friendly name of this program.
 	var/extended_desc = "N/A"				// Short description of this program's function.
@@ -20,12 +22,18 @@
 	var/computer_emagged = 0				// Set to 1 if computer that's running us was emagged. Computer updates this every Process() tick
 	var/ui_header = null					// Example: "something.gif" - a header image that will be rendered in computer's UI when this program is running at background. Images are taken from /nano/images/status_icons. Be careful not to use too large images!
 
-
 /datum/computer_file/program/New(var/obj/item/modular_computer/comp = null)
 	..()
 	if(comp && istype(comp))
 		computer = comp
 
+/datum/computer_file/program/Destroy()
+	computer = null
+	. = ..()
+
+/datum/computer_file/program/nano_host()
+	return computer.nano_host()
+
 /datum/computer_file/program/clone()
 	var/datum/computer_file/program/temp = ..()
 	temp.required_access = required_access
@@ -55,6 +63,11 @@
 		return 0
 	return 1
 
+/datum/computer_file/program/proc/get_signal(var/specific_action = 0)
+	if(computer)
+		return computer.get_ntnet_status(specific_action)
+	return 0
+
 // Called by Process() on device that runs us, once every tick.
 /datum/computer_file/program/proc/process_tick()
 	return 1
@@ -69,6 +82,9 @@
 	if(!access_to_check) // No required_access, allow it.
 		return 1
 
+	if(!istype(user))
+		return 0
+
 	var/obj/item/weapon/card/id/I = user.GetIdCard()
 	if(!I)
 		if(loud)
@@ -90,19 +106,18 @@
 // This is performed on program startup. May be overriden to add extra logic. Remember to include ..() call. Return 1 on success, 0 on failure.
 // When implementing new program based device, use this to run the program.
 /datum/computer_file/program/proc/run_program(var/mob/living/user)
-	if(can_run(user, 1))
+	if(can_run(user, 1) || !requires_access_to_run)
 		if(nanomodule_path)
-			NM = new nanomodule_path(computer)	// Computer is passed here as it's (probably!) physical object. Some UI's perform get_turf() and passing program datum wouldn't go well with this.
-			NM.program = src					// Set the program reference to separate variable, instead.
+			NM = new nanomodule_path(src, new /datum/topic_manager/program(src), src)
 		if(requires_ntnet && network_destination)
 			generate_network_log("Connection opened to [network_destination].")
-		running = 1
+		program_state = PROGRAM_STATE_ACTIVE
 		return 1
 	return 0
 
 // Use this proc to kill the program. Designed to be implemented by each program if it requires on-quit logic, such as the NTNRC client.
 /datum/computer_file/program/proc/kill_program(var/forced = 0)
-	running = 0
+	program_state = PROGRAM_STATE_KILLED
 	if(network_destination)
 		generate_network_log("Connection to [network_destination] closed.")
 	if(NM)
@@ -113,7 +128,7 @@
 // This is called every tick when the program is enabled. Ensure you do parent call if you override it. If parent returns 1 continue with UI initialisation.
 // It returns 0 if it can't run or if NanoModule was used instead. I suggest using NanoModules where applicable.
 /datum/computer_file/program/ui_interact(mob/user, ui_key = "main", var/datum/nanoui/ui = null, var/force_open = 1)
-	if(!running) // Our program was closed. Close the ui if it exists.
+	if(program_state != PROGRAM_STATE_ACTIVE) // Our program was closed. Close the ui if it exists.
 		if(ui)
 			ui.close()
 		return computer.ui_interact(user)
@@ -133,3 +148,10 @@
 		return 1
 	if(computer)
 		return computer.Topic(href, href_list)
+
+// Relays the call to nano module, if we have one
+/datum/computer_file/program/proc/check_eye(var/mob/user)
+	if(NM)
+		return NM.check_eye(user)
+	else
+		return -1