Migrate bio chip cases and implanters to the new attack chain. (#32427)

code/game/objects/items/bio_chips/bio_chip_case.dm

@@ -8,7 +8,7 @@
 	origin_tech = "materials=1;biotech=2"
 	container_type = OPENCONTAINER | INJECTABLE | DRAWABLE
 	materials = list(MAT_GLASS = 500)
-
+	new_attack_chain = TRUE
 	var/obj/item/bio_chip/imp
 	var/obj/item/bio_chip/implant_type
 
@@ -41,27 +41,42 @@
 		var/image/implant_overlay = image('icons/obj/bio_chips.dmi', imp.implant_state)
 		. += implant_overlay
 
-/obj/item/bio_chip_case/attackby__legacy__attackchain(obj/item/W, mob/user)
-	..()
+/obj/item/bio_chip_case/item_interaction(mob/living/user, obj/item/used, list/modifiers)
+	if(!is_pen(used) && !istype(used, /obj/item/bio_chip_implanter))
+		return ..()
 
-	if(is_pen(W))
-		rename_interactive(user, W)
-	else if(istype(W, /obj/item/bio_chip_implanter))
-		var/obj/item/bio_chip_implanter/I = W
-		if(I.imp)
-			if(imp || I.imp.implanted)
-				return
-			I.imp.forceMove(src)
-			imp = I.imp
-			I.imp = null
+	if(is_pen(used))
+		rename_interactive(user, used)
+		return ITEM_INTERACT_COMPLETE
+
+	var/obj/item/bio_chip_implanter/implanter = used
+	if(implanter.imp)
+		if(imp)
+			to_chat(user, SPAN_WARNING("There's already an implant in [src]!"))
+			return ITEM_INTERACT_COMPLETE
+
+		if(implanter.imp.implanted)
+			to_chat(user, SPAN_WARNING("[imp] is currently inside someone, which is likely a bug if you're getting this message."))
+			return ITEM_INTERACT_COMPLETE
+
+		implanter.imp.forceMove(src)
+		imp = implanter.imp
+		implanter.imp = null
+		update_state()
+
+		to_chat(user, SPAN_NOTICE("You move [imp] from [implanter] to [src]."))
+	else
+		if(imp)
+			if(implanter.imp)
+				to_chat(user, SPAN_WARNING("[implanter] already has an implant inside!"))
+				return ITEM_INTERACT_COMPLETE
+			imp.forceMove(implanter)
+			implanter.imp = imp
+			imp = null
 			update_state()
-			I.update_icon(UPDATE_ICON_STATE)
-		else
-			if(imp)
-				if(I.imp)
-					return
-				imp.loc = I
-				I.imp = imp
-				imp = null
-				update_state()
-			I.update_icon(UPDATE_ICON_STATE)
+			to_chat(user, SPAN_NOTICE("You move [implanter.imp] from [src] to [implanter]."))
+
+	add_fingerprint(user)
+	implanter.add_fingerprint(user)
+	implanter.update_icon(UPDATE_ICON_STATE)
+	return ITEM_INTERACT_COMPLETE

code/game/objects/items/bio_chips/bio_chipper.dm

@@ -9,6 +9,7 @@
 	w_class = WEIGHT_CLASS_SMALL
 	origin_tech = "materials=2;biotech=3"
 	materials = list(MAT_METAL = 600, MAT_GLASS = 200)
+	new_attack_chain = TRUE
 	var/obj/item/bio_chip/imp
 	var/obj/item/bio_chip/implant_type
 
@@ -20,28 +21,41 @@
 		icon_state = "implanter0"
 		origin_tech = initial(origin_tech)
 
-/obj/item/bio_chip_implanter/attack__legacy__attackchain(mob/living/carbon/M, mob/user)
-	if(!iscarbon(M))
-		return
-	if(user && imp)
-		if(M != user)
-			M.visible_message(SPAN_WARNING("[user] is attempting to bio-chip [M]."))
+/obj/item/bio_chip_implanter/interact_with_atom(atom/target, mob/living/user, list/modifiers)
+	if(!iscarbon(target))
+		return NONE
 
-		var/turf/T = get_turf(M)
-		if(T && (M == user || do_after(user, 50 * toolspeed, target = M)))
-			if(user && M && (get_turf(M) == T) && src && imp)
-				if(imp.implant(M, user))
-					if(M == user)
-						to_chat(user, SPAN_NOTICE("You bio-chip yourself."))
-					else
-						M.visible_message("[user] has implanted [M].", SPAN_NOTICE("[user] bio-chips you."))
-					imp = null
-					update_icon(UPDATE_ICON_STATE)
+	if(!imp)
+		to_chat(user, SPAN_WARNING("There's no implant inside [src]!"))
+		return ITEM_INTERACT_COMPLETE
 
-/obj/item/bio_chip_implanter/attackby__legacy__attackchain(obj/item/W, mob/user, params)
-	..()
-	if(is_pen(W))
-		rename_interactive(user, W)
+	if(target != user)
+		target.visible_message(SPAN_WARNING("[user] is attempting to bio-chip [target]."))
+
+	var/turf/T = get_turf(target)
+	if(!(T && (target == user || do_after_once(user, 50 * toolspeed, target = target))))
+		return ITEM_INTERACT_COMPLETE
+
+	if(QDELETED(user) || !imp)
+		return ITEM_INTERACT_COMPLETE
+
+	if(!imp.implant(target, user))
+		to_chat(user, SPAN_WARNING("You fail to insert the bio-chip."))
+		return ITEM_INTERACT_COMPLETE
+
+	if(target == user)
+		to_chat(user, SPAN_NOTICE("You bio-chip yourself."))
+	else
+		target.visible_message("[user] has implanted [target].", SPAN_NOTICE("[user] bio-chips you."))
+	imp = null
+	update_icon(UPDATE_ICON_STATE)
+	add_fingerprint(user)
+	return ITEM_INTERACT_COMPLETE
+
+/obj/item/bio_chip_implanter/item_interaction(mob/living/user, obj/item/used, list/modifiers)
+	if(is_pen(used))
+		rename_interactive(user, used)
+		return ITEM_INTERACT_COMPLETE
 
 /obj/item/bio_chip_implanter/Initialize(mapload)
 	. = ..()