From 1a725b9708847e1c0db55504db64f58e27740ba6 Mon Sep 17 00:00:00 2001
From: Alan <alfalfascout@users.noreply.github.com>
Date: Sun, 17 May 2026 14:42:16 -0400
Subject: [PATCH] Migrate paper planes to the new attack chain. (#31997)

* Migrate paper planes to the new attack chain.

* Call parent in activate_self().

* Add examine hint about folding paper planes.

* Add many fingerprints.
---
 code/modules/paperwork/paper.dm      |  1 +
 code/modules/paperwork/paperplane.dm | 46 +++++++++++++++++-----------
 2 files changed, 29 insertions(+), 18 deletions(-)

diff --git a/code/modules/paperwork/paper.dm b/code/modules/paperwork/paper.dm
index f80e99b32e0..cd2b514b5fd 100644
--- a/code/modules/paperwork/paper.dm
+++ b/code/modules/paperwork/paper.dm
@@ -71,6 +71,7 @@
 /obj/item/paper/examine(mob/user)
 	. = ..()
 	. += SPAN_NOTICE("<b>Alt-Click</b> [src] with a pen in hand to rename it.")
+	. += SPAN_NOTICE("<b>Alt-Click</b> [src] inhand to fold it into an airplane.")
 	if(user.is_literate())
 		if(in_range(user, src) || isobserver(user))
 			show_content(user)
diff --git a/code/modules/paperwork/paperplane.dm b/code/modules/paperwork/paperplane.dm
index de35d8c4a68..9d326d0f787 100644
--- a/code/modules/paperwork/paperplane.dm
+++ b/code/modules/paperwork/paperplane.dm
@@ -12,6 +12,7 @@
 
 	var/obj/item/paper/internal_paper
 	scatter_distance = 8
+	new_attack_chain = TRUE
 
 /obj/item/paperplane/Initialize(mapload, obj/item/paper/new_paper)
 	. = ..()
@@ -49,41 +50,48 @@
 			var/obj/item/stamp = S
 			. += "paperplane_[initial(stamp.icon_state)]"
 
-/obj/item/paperplane/attack_self__legacy__attackchain(mob/user) // Unfold the paper plane
+/obj/item/paperplane/activate_self(mob/user) // Unfold the paper plane
+	if(!user)
+		return ..()
 	to_chat(user, SPAN_NOTICE("You unfold [src]."))
-	if(internal_paper)
-		internal_paper.forceMove(get_turf(src))
-		user.put_in_hands(internal_paper)
-		internal_paper = null
-		qdel(src)
+	if(!internal_paper)
+		return ITEM_INTERACT_COMPLETE
+	internal_paper.forceMove(get_turf(src))
+	user.put_in_hands(internal_paper)
+	internal_paper.add_fingerprint(user)
+	internal_paper = null
+	qdel(src)
+	return ITEM_INTERACT_COMPLETE
 
-/obj/item/paperplane/attackby__legacy__attackchain(obj/item/P, mob/living/carbon/human/user, params)
-	..()
-
-	if(is_pen(P) || istype(P, /obj/item/toy/crayon))
+/obj/item/paperplane/item_interaction(mob/living/user, obj/item/used, list/modifiers)
+	if(is_pen(used) || istype(used, /obj/item/toy/crayon))
 		to_chat(user, SPAN_NOTICE("You should unfold [src] before changing it."))
-		return
+		return ITEM_INTERACT_COMPLETE
 
-	else if(istype(P, /obj/item/stamp)) 	//we don't randomize stamps on a paperplane
-		internal_paper.item_interaction(user, P) // spoofed attack to update internal paper.
+	if(istype(used, /obj/item/stamp)) 	//we don't randomize stamps on a paperplane
+		internal_paper.item_interaction(user, used) // spoofed attack to update internal paper.
 		update_icon()
+		add_fingerprint(user)
+		return ITEM_INTERACT_COMPLETE
 
-	else if(P.get_heat())
+	if(used.get_heat())
 		if(HAS_TRAIT(user, TRAIT_CLUMSY) && prob(10))
 			user.visible_message(SPAN_WARNING("[user] accidentally ignites [user.p_themselves()]!"), \
 				SPAN_USERDANGER("You miss [src] and accidentally light yourself on fire!"))
-			user.drop_item_to_ground(P)
+			user.drop_item_to_ground(used)
 			user.adjust_fire_stacks(1)
 			user.IgniteMob()
-			return
+			return ITEM_INTERACT_COMPLETE
 
 		if(!in_range(user, src)) //to prevent issues as a result of telepathically lighting a paper
-			return
+			return ITEM_INTERACT_COMPLETE
 		user.drop_item_to_ground(src)
-		user.visible_message(SPAN_DANGER("[user] lights [src] on fire with [P]!"), SPAN_DANGER("You lights [src] on fire!"))
+		user.visible_message(SPAN_DANGER("[user] lights [src] on fire with [used]!"), SPAN_DANGER("You lights [src] on fire!"))
 		fire_act()
+		return ITEM_INTERACT_COMPLETE
 
 	add_fingerprint(user)
+	return ..()
 
 /obj/item/paperplane/throw_impact(atom/hit_atom)
 	if(..())
@@ -114,5 +122,7 @@
 		user.unequip(src) // forceMove happens in paperplane/Initialize
 		I = new /obj/item/paperplane(user, src)
 		user.put_in_hands(I)
+		add_fingerprint(user)
+		I.add_fingerprint(user)
 	else
 		to_chat(user, SPAN_NOTICE("You lack the dexterity to fold [src]."))