Updates emag attackby usages to emag_act where it's not too much of a headache.

code/modules/power/rust/core_gen.dm

@@ -150,15 +150,15 @@ max volume of phoron storeable by the field = the total volume of a number of ti
 		else
 			user << "\red Access denied."
 		return
-
-	if(istype(W, /obj/item/weapon/card/emag) && !emagged)
+	..()
+	return
+	
+/obj/machinery/power/rust_core/emag_act(var/remaining_charges, var/mob/user)
+	if(!emagged)
 		locked = 0
 		emagged = 1
 		user.visible_message("[user.name] emags the [src.name].","\red You short out the lock.")
-		return
-
-	..()
-	return
+		return 1
 
 /obj/machinery/power/rust_core/attack_ai(mob/user)
 	attack_hand(user)

code/modules/power/rust/fuel_compressor_construction.dm

@@ -14,6 +14,21 @@
 	//20% easier to read than apc code
 	pixel_x = (dir & 3)? 0 : (dir == 4 ? 32 : -32)
 	pixel_y = (dir & 3)? (dir ==1 ? 32 : -32) : 0
+	
+/obj/machinery/rust_fuel_compressor/emag_act(var/remaining_charges, var/mob/user)
+	if (!emagged)
+		if(opened)
+			user << "You must close the cover to swipe an ID card."
+		else
+			flick("apc-spark", src)
+			if (do_after(user,6))
+				if(prob(50))
+					emagged = 1
+					locked = 0
+					user << "You emag the port interface."
+				else
+					user << "You fail to [ locked ? "unlock" : "lock"] the compressor interface."
+				return 1
 
 /obj/machinery/rust_fuel_compressor/attackby(obj/item/W, mob/user)
 
@@ -55,21 +70,6 @@
 			else
 				user << "\red Access denied."
 		return
-
-	else if (istype(W, /obj/item/weapon/card/emag) && !emagged)		// trying to unlock with an emag card
-		if(opened)
-			user << "You must close the cover to swipe an ID card."
-		else
-			flick("apc-spark", src)
-			if (do_after(user,6))
-				if(prob(50))
-					emagged = 1
-					locked = 0
-					user << "You emag the port interface."
-				else
-					user << "You fail to [ locked ? "unlock" : "lock"] the compressor interface."
-		return
-
 	else if (istype(W, /obj/item/stack/cable_coil) && opened && !(has_electronics & 2))
 		var/obj/item/stack/cable_coil/C = W
 		if(C.amount < 10)

code/modules/power/rust/fuel_injector.dm

@@ -106,12 +106,6 @@
 			user << "\red Access denied."
 		return
 
-	if(istype(W, /obj/item/weapon/card/emag) && !emagged)
-		locked = 0
-		emagged = 1
-		user.visible_message("[user.name] emags the [src.name].","\red You short out the lock.")
-		return
-
 	if(istype(W, /obj/item/weapon/fuel_assembly) && !cur_assembly)
 		if(emergency_insert_ready)
 			cur_assembly = W
@@ -122,6 +116,13 @@
 
 	..()
 	return
+	
+/obj/machinery/power/rust_fuel_injector/emag_act(var/remaining_charges, var/mob/user)
+	if(!emagged)
+		locked = 0
+		emagged = 1
+		user.visible_message("[user.name] emags the [src.name].","\red You short out the lock.")
+		return 1
 
 /obj/machinery/power/rust_fuel_injector/attack_ai(mob/user)
 	attack_hand(user)