Migrate GPS to the new attack chain. (#32241)

* Migrate GPS to the new attack chain.

* Add fingerprint.

code/modules/awaymissions/mission_code/ruins/gps_ruin.dm

@@ -11,7 +11,7 @@
 	gpstag = "Unknown Signal"
 
 /obj/item/gps/ruin/attack_hand(mob/user)
-	attack_self__legacy__attackchain(user)
+	ui_interact(user)
 
 /obj/item/gps/ruin/mining_base
 	gpstag = "Nanotrasen Mining Outpost"

code/modules/mining/equipment/survival_pod.dm

@@ -257,7 +257,7 @@ MAPPING_DIRECTIONAL_HELPERS(/obj/machinery/economy/vending/wallmed/survival_pod,
 	qdel(src)
 
 /obj/item/gps/computer/attack_hand(mob/user)
-	attack_self__legacy__attackchain(user)
+	ui_interact(user)
 
 //Bed
 /obj/structure/bed/pod

code/modules/mod/modules/modules_supply.dm

@@ -20,7 +20,7 @@
 	gps = new(src)
 
 /obj/item/mod/module/gps/on_use()
-	gps.attack_self__legacy__attackchain(mod.wearer)
+	gps.activate_self(mod.wearer)
 
 ///Hydraulic Clamp - Lets you pick up and drop crates.
 /obj/item/mod/module/clamp

code/modules/telesci/gps.dm

@@ -28,6 +28,7 @@ GLOBAL_LIST_EMPTY(GPS_list)
 	var/emped = FALSE
 	/// Turf reference. If set, it will appear in the UI. Used by [/obj/machinery/computer/telescience].
 	var/turf/locked_location
+	new_attack_chain = TRUE
 
 /obj/item/gps/Initialize(mapload)
 	. = ..()
@@ -131,8 +132,12 @@ GLOBAL_LIST_EMPTY(GPS_list)
 
 	return data
 
-/obj/item/gps/attack_self__legacy__attackchain(mob/user)
+/obj/item/gps/activate_self(mob/user)
+	if(..())
+		return ITEM_INTERACT_COMPLETE
+	add_fingerprint(user)
 	ui_interact(user)
+	return ITEM_INTERACT_COMPLETE
 
 /obj/item/gps/ui_state(mob/user)
 	return GLOB.inventory_state