Walking Aid Component (#96294)

## About The Pull Request
So I saw someone was adding a limping quirk in
https://github.com/tgstation/tgstation/pull/96200 and I had tried to do
the same back in https://github.com/tgstation/tgstation/pull/71470 a few
years ago. The codebase has evolved enough to support this behavior that
was not present initially during my first attempt. One of the big
features of my old PR was to add cane-like behavior to a bunch of other
pole objects.

This PR introduces a new modular `/datum/component/walking_aid`
component, moving canes/crutches away from hardcoded object behavior.
This component is now attached to the following items:
- Brooms
- Mops
- Staves
- Scythes
- Spears
- Canes
- Crutches

There are also some notable changes I made to how things work, detailed
below:
- Walking aid objects must be held on the same side as the affected leg
(if your right leg is missing, you need to be holding crutches on your
right arm)
- Objects lose their ability as a walking aid while being wielded with
two hands (ex. spears)
- Limping/Limbless are now both affected by a walking aid, where before
only crutches helped assist limbless mobs
- "Walking Aid" examine tag when the walking aid object is examined

All walking aids (except crutches) reduce limbless slowdown by 40%, and
completely ignore any limping penalties. Crutches reduce the limbless
slowdown by 60% and are much faster.

## Why It's Good For The Game
1. Mah Immersion
2. More modular code
3. Examine tags are peak
4. Assistants can now justify carrying spears as medical equipment
5. Cane/Poles should help with limblessness, but not as helpful as
crutches

While I wanted pole items to offer mobility support, they needed to
remain less effective than dedicated medical crutches. During testing, I
found that a 40% reduction is the point where the benefit becomes
noticeable.

## Changelog
🆑
add: Pole objects like mops, brooms, staves, scythes, and spears can now
be held in a hand to act as walking aids, mitigating limping from
fractures and reducing missing-leg slowdowns.
balance: Walking aids must be held in the hand on the same side as the
injured or missing leg to provide support, and lose their effectiveness
if actively wielded with two hands.
balance: Objects with the walking aid reduce limbless slowdown by 40%,
while dedicated medical crutches reduce it by 60%.
refactor: Refactor cane and crutch code logic into a modular walking aid
component
/🆑

code/__DEFINES/dcs/signals/signals_mob/signals_mob_carbon.dm

@@ -167,7 +167,7 @@
 	/// Return to skip oxyloss and similar effects from blood level
 	#define HANDLE_BLOOD_NO_OXYLOSS (1<<2)
 
-/// from /datum/status_effect/limp/proc/check_step(mob/whocares, OldLoc, Dir, forced) iodk where it should go
+/// from /datum/status_effect/limp/proc/check_step(mob/whocares, OldLoc, Dir, forced): (var/obj/item/bodypart/limping_leg)
 #define COMSIG_CARBON_LIMPING "mob_limp_check"
 	#define COMPONENT_CANCEL_LIMP (1<<0)
 

code/datums/components/walking_aid.dm

@@ -0,0 +1,161 @@
+/**
+ * Walking Aid Component
+ *
+ * Add this to an item to allow it to act as a cane (or crutch) while held.
+ * Items with this component will help mobs avoid limping from broken
+ * leg bones, and lessen the slowdown caused by missing legs.
+ *
+ * Used by canes, crutches, and pole-like items such as spears and staffs.
+ */
+/datum/component/walking_aid
+	dupe_mode = COMPONENT_DUPE_UNIQUE
+	/// Causes a mob to waddle (wiggle) while walking when holding this object
+	var/waddling = FALSE
+	/// If set, the parent item must have this trait for the support to function
+	var/required_trait
+	/// Weakref to the mob currently being supported
+	var/datum/weakref/current_user_ref
+	/// The amount of slowdown to reduce for a limbless leg
+	var/limbless_slowdown_modifier = 0.6 // reduces slowdown by 40%
+
+/datum/component/walking_aid/Initialize(limbless_slowdown_modifier = 0.6, required_trait = null, waddling = FALSE)
+	if(!isitem(parent))
+		return COMPONENT_INCOMPATIBLE
+
+	src.waddling = waddling
+	src.required_trait = required_trait
+	src.limbless_slowdown_modifier = limbless_slowdown_modifier
+
+/datum/component/walking_aid/Destroy(force)
+	remove_support()
+	return ..()
+
+/datum/component/walking_aid/RegisterWithParent()
+	RegisterSignal(parent, COMSIG_ITEM_EQUIPPED, PROC_REF(on_equip))
+	RegisterSignal(parent, COMSIG_ITEM_DROPPED, PROC_REF(on_drop))
+	RegisterSignal(parent, COMSIG_ATOM_EXAMINE_TAGS, PROC_REF(get_examine_tags))
+	RegisterSignal(parent, SIGNAL_ADDTRAIT(TRAIT_WIELDED), PROC_REF(update_legs))
+	RegisterSignal(parent, SIGNAL_REMOVETRAIT(TRAIT_WIELDED), PROC_REF(update_legs))
+	RegisterSignal(parent, SIGNAL_ADDTRAIT(required_trait), PROC_REF(update_legs))
+	RegisterSignal(parent, SIGNAL_REMOVETRAIT(required_trait), PROC_REF(update_legs))
+
+/datum/component/walking_aid/UnregisterFromParent()
+	UnregisterSignal(parent, list(
+		COMSIG_ITEM_EQUIPPED,
+		COMSIG_ITEM_DROPPED,
+		COMSIG_ATOM_EXAMINE_TAGS,
+		SIGNAL_ADDTRAIT(TRAIT_WIELDED),
+		SIGNAL_REMOVETRAIT(TRAIT_WIELDED),
+		SIGNAL_ADDTRAIT(required_trait),
+		SIGNAL_REMOVETRAIT(required_trait),
+	))
+	remove_support()
+
+/datum/component/walking_aid/proc/on_equip(datum/source, mob/equipper, slot)
+	SIGNAL_HANDLER
+
+	remove_support()
+	if(!(slot & ITEM_SLOT_HANDS))
+		return
+	if(!isliving(equipper))
+		return
+
+	apply_support(equipper)
+
+/datum/component/walking_aid/proc/on_drop(datum/source, mob/user)
+	SIGNAL_HANDLER
+	remove_support()
+
+/datum/component/walking_aid/proc/get_examine_tags(atom/source, mob/user, list/examine_list)
+	SIGNAL_HANDLER
+
+	examine_list["walking-aid"] = "It can help lessen the slowdown caused from a missing or injured leg, when held on the same side as the injury."
+
+// Updates our leg status when wielded/unwielded a two handed walking aid like a spear
+/datum/component/walking_aid/proc/update_legs(atom/source)
+	SIGNAL_HANDLER
+
+	var/mob/living/user = current_user_ref?.resolve()
+	user?.update_usable_leg_status()
+
+/datum/component/walking_aid/proc/apply_support(mob/living/user)
+	if(current_user_ref)
+		remove_support()
+
+	current_user_ref = WEAKREF(user)
+	RegisterSignal(user, COMSIG_CARBON_LIMPING, PROC_REF(handle_limping))
+	RegisterSignal(user, COMSIG_LIVING_LIMBLESS_SLOWDOWN, PROC_REF(handle_slowdown))
+	user.update_usable_leg_status()
+
+	if(waddling)
+		user.AddElementTrait(TRAIT_WADDLING, REF(src), /datum/element/waddling)
+
+/datum/component/walking_aid/proc/remove_support()
+	var/mob/living/user = current_user_ref?.resolve()
+	current_user_ref = null
+	if(isnull(user))
+		return
+	UnregisterSignal(user, list(COMSIG_CARBON_LIMPING, COMSIG_LIVING_LIMBLESS_SLOWDOWN))
+	user.update_usable_leg_status()
+
+	if(waddling)
+		REMOVE_TRAIT(user, TRAIT_WADDLING, REF(src))
+
+/datum/component/walking_aid/proc/is_active()
+	// if both hands are holding it, then it is not being used for support
+	if(HAS_TRAIT(parent, TRAIT_WIELDED))
+		return FALSE
+
+	if(isnull(required_trait))
+		return TRUE
+
+	return HAS_TRAIT(parent, required_trait)
+
+/datum/component/walking_aid/proc/handle_limping(mob/living/user, obj/item/bodypart/limping_leg)
+	SIGNAL_HANDLER
+
+	if(!is_active())
+		return NONE
+	if(isnull(limping_leg))
+		return NONE
+
+	var/supported_zone = get_supported_leg_zone(user)
+	if(isnull(supported_zone))
+		return NONE
+	if(limping_leg.body_zone != supported_zone)
+		return NONE
+
+	return COMPONENT_CANCEL_LIMP
+
+/datum/component/walking_aid/proc/handle_slowdown(mob/living/user, limbless_slowdown, list/slowdown_mods)
+	SIGNAL_HANDLER
+
+	if(!is_active())
+		return
+	if(!iscarbon(user))
+		return
+	var/mob/living/carbon/carbon_user = user
+	var/leg_amount = carbon_user.usable_legs
+	if(leg_amount >= carbon_user.default_num_legs)
+		return
+	if(!leg_amount) // someday support dual-wielding crutches but for now they are destined to waddle
+		return
+
+	var/supported_zone = get_supported_leg_zone(user)
+	if(isnull(supported_zone))
+		return
+	if(carbon_user.get_bodypart(supported_zone)) // make sure their leg is actually missing
+		return
+
+	slowdown_mods += limbless_slowdown_modifier
+
+/datum/component/walking_aid/proc/get_supported_leg_zone(mob/living/user)
+	var/held_hand_zone = user.get_hand_zone_of_item(parent)
+
+	switch(held_hand_zone)
+		if(BODY_ZONE_R_ARM)
+			return BODY_ZONE_R_LEG
+		if(BODY_ZONE_L_ARM)
+			return BODY_ZONE_L_LEG
+		else
+			return null

code/datums/status_effects/wound_effects.dm

@@ -79,18 +79,21 @@
 	// less limping while we have determination still
 	var/determined_mod = owner.has_status_effect(/datum/status_effect/determined) ? 0.5 : 1
 
+	var/obj/item/bodypart/leg_about_to_limp
 	var/limp_chance
 	var/limp_slowdown
 	if(next_leg == left)
+		leg_about_to_limp = left
 		limp_chance = limp_chance_left
 		limp_slowdown = slowdown_left
 		next_leg = right
 	else
+		leg_about_to_limp = right
 		limp_chance = limp_chance_right
 		limp_slowdown = slowdown_right
 		next_leg = left
 
-	if(SEND_SIGNAL(owner, COMSIG_CARBON_LIMPING) & COMPONENT_CANCEL_LIMP)
+	if(SEND_SIGNAL(owner, COMSIG_CARBON_LIMPING, leg_about_to_limp) & COMPONENT_CANCEL_LIMP)
 		return
 
 	if(prob(limp_chance * determined_mod))

code/game/objects/items/mop.dm

@@ -36,6 +36,7 @@
 /obj/item/mop/Initialize(mapload)
 	. = ..()
 	AddComponent(/datum/component/cleaner, mopspeed, pre_clean_callback=CALLBACK(src, PROC_REF(should_clean)), on_cleaned_callback=CALLBACK(src, PROC_REF(apply_reagents)))
+	AddComponent(/datum/component/walking_aid)
 	create_reagents(max_reagent_volume)
 	GLOB.janitor_devices += src
 

code/game/objects/items/pitchfork.dm

@@ -32,6 +32,7 @@
 	. = ..()
 	AddComponent(/datum/component/jousting)
 	AddComponent(/datum/component/two_handed, force_unwielded=7, force_wielded=15, icon_wielded="[base_icon_state]1")
+	AddComponent(/datum/component/walking_aid)
 
 /obj/item/pitchfork/update_icon_state()
 	icon_state = "[base_icon_state]0"

code/game/objects/items/religion.dm

@@ -337,6 +337,10 @@
 	var/staffcooldown = 0
 	var/staffwait = 30
 
+/obj/item/godstaff/Initialize(mapload)
+	. = ..()
+	AddComponent(/datum/component/walking_aid)
+
 /obj/item/godstaff/interact_with_atom(atom/interacting_with, mob/living/user, list/modifiers)
 	if(SHOULD_SKIP_INTERACTION(interacting_with, src, user))
 		return NONE

code/game/objects/items/tools/janitorial/broom.dm

@@ -29,6 +29,7 @@
 		wield_callback = CALLBACK(src, PROC_REF(on_wield)), \
 		unwield_callback = CALLBACK(src, PROC_REF(on_unwield)), \
 	)
+	AddComponent(/datum/component/walking_aid)
 
 /obj/item/pushbroom/update_icon_state()
 	icon_state = "[base_icon_state]0"

code/game/objects/items/tools/medical/cane.dm

@@ -13,32 +13,18 @@
 	custom_materials = list(/datum/material/iron= SMALL_MATERIAL_AMOUNT * 0.5)
 	attack_verb_continuous = list("bludgeons", "whacks", "disciplines", "thrashes")
 	attack_verb_simple = list("bludgeon", "whack", "discipline", "thrash")
+	/// The amount of slowdown to reduce for a limbless leg
+	var/limbless_slowdown_modifier = 0.6 // reduces slowdown by 40%
+	/// Does this cause waddling when held
+	var/causes_waddling = FALSE
 
-/obj/item/cane/examine(mob/user, thats)
+/obj/item/cane/Initialize(mapload)
 	. = ..()
-	. += span_notice("This item can be used to support your weight, preventing limping from any broken bones on your legs you may have.")
+	AddComponent(/datum/component/walking_aid, limbless_slowdown_modifier, get_walking_aid_required_trait(), causes_waddling)
 
-/obj/item/cane/equipped(mob/living/user, slot, initial)
-	..()
-	if(!(slot & ITEM_SLOT_HANDS))
-		return
-	movement_support_add(user)
-
-/obj/item/cane/dropped(mob/living/user, silent = FALSE)
-	. = ..()
-	movement_support_del(user)
-
-/obj/item/cane/proc/movement_support_add(mob/living/user)
-	RegisterSignal(user, COMSIG_CARBON_LIMPING, PROC_REF(handle_limping))
-	return TRUE
-
-/obj/item/cane/proc/movement_support_del(mob/living/user)
-	UnregisterSignal(user, list(COMSIG_CARBON_LIMPING))
-	return TRUE
-
-/obj/item/cane/proc/handle_limping(mob/living/user)
-	SIGNAL_HANDLER
-	return COMPONENT_CANCEL_LIMP
+/// Determines if a trait is required to be used as a walking aid (ex. foldable canes)
+/obj/item/cane/proc/get_walking_aid_required_trait()
+	return null
 
 /obj/item/cane/crutch
 	name = "medical crutch"
@@ -55,42 +41,13 @@
 	custom_materials = list(/datum/material/iron = SMALL_MATERIAL_AMOUNT * 0.5)
 	attack_verb_continuous = list("bludgeons", "whacks", "thrashes")
 	attack_verb_simple = list("bludgeon", "whack", "thrash")
+	limbless_slowdown_modifier = 0.4 // reduces slowdown by 60%
+	causes_waddling = TRUE
 
 /obj/item/cane/crutch/Initialize(mapload)
 	. = ..()
 	AddElement(/datum/element/cuffable_item)
 
-/obj/item/cane/crutch/examine(mob/user, thats)
-	. = ..()
-	// tacked on after the cane string
-	. += span_notice("As a crutch, it can also help lessen the slowdown incurred by missing a leg.")
-
-/obj/item/cane/crutch/movement_support_add(mob/living/user)
-	. = ..()
-	if(!.)
-		return
-	RegisterSignal(user, COMSIG_LIVING_LIMBLESS_SLOWDOWN, PROC_REF(handle_slowdown))
-	user.update_usable_leg_status()
-	user.AddElementTrait(TRAIT_WADDLING, REF(src), /datum/element/waddling)
-
-/obj/item/cane/crutch/movement_support_del(mob/living/user)
-	. = ..()
-	if(!.)
-		return
-	UnregisterSignal(user, list(COMSIG_LIVING_LIMBLESS_SLOWDOWN, COMSIG_CARBON_LIMPING))
-	user.update_usable_leg_status()
-	REMOVE_TRAIT(user, TRAIT_WADDLING, REF(src))
-
-/obj/item/cane/crutch/proc/handle_slowdown(mob/living/user, limbless_slowdown, list/slowdown_mods)
-	SIGNAL_HANDLER
-	var/leg_amount = user.usable_legs
-	// Don't do anything if the number is equal (or higher) to the usual.
-	if(leg_amount >= user.default_num_legs)
-		return
-	// If we have at least one leg and it's less than the default, reduce slowdown by 60%.
-	if(leg_amount && (leg_amount < user.default_num_legs))
-		slowdown_mods += 0.4
-
 /obj/item/cane/crutch/wood
 	name = "wooden crutch"
 	desc = "A handmade crutch. Also makes a decent bludgeon if you need it."
@@ -124,15 +81,16 @@
 	)
 	RegisterSignal(src, COMSIG_TRANSFORMING_ON_TRANSFORM, PROC_REF(on_transform))
 
-/obj/item/cane/white/handle_limping(mob/living/user)
-	return HAS_TRAIT(src, TRAIT_TRANSFORM_ACTIVE) ? COMPONENT_CANCEL_LIMP : NONE
+// White canes only provide support while extended
+/obj/item/cane/white/get_walking_aid_required_trait()
+	return TRAIT_TRANSFORM_ACTIVE
 
 /*
  * Signal proc for [COMSIG_TRANSFORMING_ON_TRANSFORM].
  *
  * Gives feedback to the user and makes it show up inhand.
  */
-/obj/item/cane/white/proc/on_transform(obj/item/source, mob/user, active)
+/obj/item/cane/white/proc/on_transform(obj/item/source, mob/living/user, active)
 	SIGNAL_HANDLER
 
 	if(user)

code/game/objects/items/weaponry/melee/misc.dm

@@ -386,6 +386,7 @@
 		force_unwielded = 10, \
 		force_wielded = 14, \
 	)
+	AddComponent(/datum/component/walking_aid)
 
 /obj/item/bambostaff/update_icon_state()
 	icon_state = inhand_icon_state = "[base_icon_state][HAS_TRAIT(src, TRAIT_WIELDED)]"
@@ -414,6 +415,10 @@
 	attack_verb_simple = list("bludgeon", "whack", "discipline")
 	resistance_flags = FLAMMABLE
 
+/obj/item/staff/Initialize(mapload)
+	. = ..()
+	AddComponent(/datum/component/walking_aid)
+
 /obj/item/staff/broom
 	name = "broom"
 	desc = "Used for sweeping, and flying into the night while cackling. Black cat not included."

code/game/objects/items/weaponry/melee/soulscythe.dm

@@ -39,6 +39,7 @@
 	RegisterSignal(soul, COMSIG_MOB_ATTACK_RANGED_SECONDARY, PROC_REF(on_secondary_attack))
 	RegisterSignal(src, COMSIG_ATOM_INTEGRITY_CHANGED, PROC_REF(on_integrity_change))
 	AddComponent(/datum/component/bane, affected_biotypes = MOB_PLANT, damage_multiplier = 1.5)
+	AddComponent(/datum/component/walking_aid)
 
 /obj/item/soulscythe/examine(mob/user)
 	. = ..()

code/game/objects/items/weaponry/melee/spear.dm

@@ -70,6 +70,7 @@
 		wield_callback = CALLBACK(src, PROC_REF(on_wield)), \
 		unwield_callback = CALLBACK(src, PROC_REF(on_unwield)), \
 	)
+	AddComponent(/datum/component/walking_aid)
 	add_headpike_component()
 	update_appearance()
 

code/modules/hydroponics/hydroitemdefines.dm

@@ -174,6 +174,7 @@
 	. = ..()
 	AddComponent(/datum/component/butchering, speed = 9 SECONDS, effectiveness = 105)
 	AddComponent(/datum/component/bane, affected_biotypes = MOB_PLANT, damage_multiplier = 1.5)
+	AddComponent(/datum/component/walking_aid)
 
 /obj/item/scythe/suicide_act(mob/living/user)
 	user.visible_message(span_suicide("[user] is beheading [user.p_them()]self with [src]! It looks like [user.p_theyre()] trying to commit suicide!"))

code/modules/jobs/job_types/chaplain/chaplain_nullrod.dm

@@ -340,6 +340,10 @@ GLOBAL_LIST_INIT(nullrod_variants, init_nullrod_variants())
 	/// The icon which appears over the mob holding the item
 	var/shield_icon = "shield-red"
 
+/obj/item/nullrod/staff/Initialize(mapload)
+	. = ..()
+	AddComponent(/datum/component/walking_aid)
+
 /obj/item/nullrod/staff/worn_overlays(mutable_appearance/standing, isinhands)
 	. = ..()
 	if(isinhands)
@@ -629,6 +633,7 @@ GLOBAL_LIST_INIT(nullrod_variants, init_nullrod_variants())
 		force_unwielded = 14, \
 		force_wielded = 18, \
 	)
+	AddComponent(/datum/component/walking_aid)
 
 /obj/item/nullrod/bostaff/update_icon_state()
 	icon_state = inhand_icon_state = "[base_icon_state][HAS_TRAIT(src, TRAIT_WIELDED)]"
@@ -703,6 +708,10 @@ GLOBAL_LIST_INIT(nullrod_variants, init_nullrod_variants())
 	sharpness = SHARP_EDGED
 	menu_description = "A sharp pitchfork. Can be worn on the back."
 
+/obj/item/nullrod/pitchfork/Initialize(mapload)
+	. = ..()
+	AddComponent(/datum/component/walking_aid)
+
 // Egyptian Staff - Used as a tool for making mummy wraps.
 
 /obj/item/nullrod/egyptian
@@ -720,6 +729,11 @@ GLOBAL_LIST_INIT(nullrod_variants, init_nullrod_variants())
 	attack_verb_simple = list("bash", "smack", "whack")
 	menu_description = "A staff. Can be used as a tool to craft exclusive egyptian items. Easily stored. Can be worn on the back."
 
+
+/obj/item/nullrod/egyptian/Initialize(mapload)
+	. = ..()
+	AddComponent(/datum/component/walking_aid)
+
 // Hypertool - It does brain damage rather than normal damage.
 
 /obj/item/nullrod/hypertool
@@ -760,6 +774,10 @@ GLOBAL_LIST_INIT(nullrod_variants, init_nullrod_variants())
 	hitsound = 'sound/items/weapons/bladeslice.ogg'
 	menu_description = "A pointy spear which penetrates armor a little. Can be worn only on the belt."
 
+/obj/item/nullrod/spear/Initialize(mapload)
+	. = ..()
+	AddComponent(/datum/component/walking_aid)
+
 // Unholy version of above, since the gamemode is dead in the water
 
 /obj/item/brass_spear
@@ -783,6 +801,10 @@ GLOBAL_LIST_INIT(nullrod_variants, init_nullrod_variants())
 	attack_verb_simple = list("stab", "poke", "slash", "clock")
 	hitsound = 'sound/items/weapons/bladeslice.ogg'
 
+/obj/item/brass_spear/Initialize(mapload)
+	. = ..()
+	AddComponent(/datum/component/walking_aid)
+
 // Nullblade - For when you really want to feel like rolling dice during combat
 
 /obj/item/nullrod/nullblade

code/modules/jobs/job_types/chaplain/chaplain_vorpal_scythe.dm

@@ -81,6 +81,7 @@ If the scythe isn't empowered when you sheath it, you take a heap of damage and
 	AddElement(/datum/element/nullrod_core, chaplain_spawnable = FALSE, rune_remove_line = "TO DUST WITH YE!! AWAY!!") // The implant is the actual item the chappie can select
 	AddComponent(/datum/component/bane, affected_biotypes = MOB_PLANT, damage_multiplier = 1.5) //also good at killing plants
 	AddComponent(/datum/component/butchering, speed = 3 SECONDS, effectiveness = 125)
+	AddComponent(/datum/component/walking_aid)
 
 /obj/item/vorpalscythe/attack(mob/living/target, mob/living/user, list/modifiers, list/attack_modifiers)
 	if(ismonkey(target) && !target.mind) //Don't empower from hitting monkeys. Hit a corgi or something, I don't know.

code/modules/projectiles/guns/magic/staff.dm

@@ -11,6 +11,10 @@
 	/// If FALSE, only wizards or survivalists can use the staff to its full potential - If TRUE, anyone can
 	var/allow_intruder_use = FALSE
 
+/obj/item/gun/magic/staff/Initialize(mapload)
+	. = ..()
+	AddComponent(/datum/component/walking_aid)
+
 /obj/item/gun/magic/staff/proc/is_wizard_or_friend(mob/user)
 	if(!HAS_MIND_TRAIT(user, TRAIT_MAGICALLY_GIFTED) && !allow_intruder_use)
 		return FALSE

tgstation.dme

@@ -1396,6 +1396,7 @@
 #include "code\datums\components\usb_port.dm"
 #include "code\datums\components\vacuum.dm"
 #include "code\datums\components\vision_hurting.dm"
+#include "code\datums\components\walking_aid.dm"
 #include "code\datums\components\wearertargeting.dm"
 #include "code\datums\components\weatherannouncer.dm"
 #include "code\datums\components\wet_floor.dm"