Multitool can be used to find the area's APC (#16544)

Co-authored-by: TiviPlus <[email protected]>

code/__DEFINES/cooldowns.dm

@@ -57,6 +57,7 @@
 #define COOLDOWN_WHISTLE_BLOW "cooldown_whistle_blow"
 #define COOLDOWN_WHISTLE_WARCRY "cooldown_whistle_warcry"
 #define COOLDOWN_ARMORED_SMOKE "cooldown_armored_smoke"
+#define COOLDOWN_LOCATE_APC "cooldown_locate_apc"
 
 //Mecha cooldowns
 #define COOLDOWN_MECHA "mecha"

code/game/objects/items/multitool.dm

@@ -18,3 +18,43 @@
 	tool_behaviour = TOOL_MULTITOOL
 
 	var/obj/machinery/telecomms/buffer // simple machine buffer for device linkage
+
+/obj/item/tool/multitool/attack_self(mob/user)
+	. = ..()
+
+	if(TIMER_COOLDOWN_CHECK(src, COOLDOWN_LOCATE_APC) || !ishuman(user) || user.skills.getRating(SKILL_ENGINEER) < SKILL_ENGINEER_METAL || !user.client)
+		return
+
+	var/area/current_area = get_area(src)
+	var/atom/area_apc = current_area ? current_area.get_apc() : null
+	if(!area_apc)
+		to_chat(user, span_warning("ERROR: Could not locate local APC."))
+		user.balloon_alert(user, "could not locate!")
+		return
+
+	var/dist = get_dist(src, area_apc)
+	var/direction = angle_to_dir(Get_Angle(get_turf(src), get_turf(area_apc)))
+	to_chat(user, span_notice("The local APC is located at [span_bold("[dist] units [dir2text(direction)]")]."))
+	user.balloon_alert(user, "[dist] units [dir2text(direction)]")
+
+	//Create the appearance so we have something to apply the filter to.
+	var/mutable_appearance/apc_appearance = new(area_apc)
+	apc_appearance.filters += list("type" = "outline", "size" = 1, "color" = COLOR_GREEN)
+	//Make it an image we can give to the client
+	var/image/final_image = image(apc_appearance)
+
+	final_image.layer = WALL_OBJ_LAYER
+	final_image.plane = GAME_PLANE
+	final_image.loc = get_turf(area_apc)
+	final_image.dir = apc_appearance.dir
+	final_image.alpha = 225
+	user.client.images += final_image
+
+	TIMER_COOLDOWN_START(src, COOLDOWN_LOCATE_APC, 1.5 SECONDS)
+	addtimer(CALLBACK(src, PROC_REF(remove_apc_highlight), user.client, final_image), 1.4 SECONDS)
+
+/// Removes the highlight from the APC.
+/obj/item/tool/multitool/proc/remove_apc_highlight(client/user_client, image/highlight_image)
+	if(!user_client)
+		return
+	user_client.images -= highlight_image