initial commit - cross reference with 5th port - obviously has compile errors

code/modules/cargo/export_scanner.dm

@@ -0,0 +1,37 @@
+/obj/item/device/export_scanner
+	name = "export scanner"
+	desc = "A device used to check objects against Nanotrasen exports database."
+	icon_state = "export_scanner"
+	item_state = "radio"
+	flags = NOBLUDGEON
+	w_class = 2
+	siemens_coefficient = 1
+	var/obj/machinery/computer/cargo/cargo_console = null
+
+/obj/item/device/export_scanner/examine(user)
+	..()
+	if(!cargo_console)
+		user << "<span class='notice'>The [src] is currently not linked to a cargo console.</span>"
+
+/obj/item/device/export_scanner/afterattack(obj/O, mob/user, proximity)
+	if(!istype(O) || !proximity)
+		return
+
+	if(istype(O, /obj/machinery/computer/cargo))
+		var/obj/machinery/computer/cargo/C = O
+		if(!C.requestonly)
+			cargo_console = C
+			user << "<span class='notice'>Scanner linked to [C].</span>"
+	else if(!istype(cargo_console))
+		user << "<span class='warning'>You must link [src] to a cargo console first!</span>"
+	else
+		// Before you fix it:
+		// yes, checking manifests is a part of intended functionality.
+		var/price = export_item_and_contents(O, cargo_console.contraband, cargo_console.emagged, dry_run=TRUE)
+
+		if(price)
+			user << "<span class='notice'>Scanned [O], value: <b>[price]</b> \
+				credits[O.contents.len ? " (contents included)" : ""].</span>"
+		else
+			user << "<span class='warning'>Scanned [O], no export value. \
+				</span>"