Porting components updates and fixing phantom thief component.

code/modules/antagonists/disease/disease_mob.dm

@@ -31,7 +31,6 @@ the new instance inside the host to be updated to the template's stats.
 	var/browser_open = FALSE
 
 	var/mob/living/following_host
-	var/datum/component/redirect/move_listener
 	var/list/disease_instances
 	var/list/hosts //this list is associative, affected_mob -> disease_instance
 	var/datum/disease/advance/sentient_disease/disease_template
@@ -261,16 +260,10 @@ the new instance inside the host to be updated to the template's stats.
 		refresh_adaptation_menu()
 
 /mob/camera/disease/proc/set_following(mob/living/L)
+	if(following_host)
+		UnregisterSignal(following_host, COMSIG_MOVABLE_MOVED)
+	RegisterSignal(L, COMSIG_MOVABLE_MOVED, .proc/follow_mob)
 	following_host = L
-	if(!move_listener)
-		move_listener = L.AddComponent(/datum/component/redirect, list(COMSIG_MOVABLE_MOVED = CALLBACK(src, .proc/follow_mob)))
-	else
-		if(L)
-			L.TakeComponent(move_listener)
-			if(QDELING(move_listener))
-				move_listener = null
-		else
-			QDEL_NULL(move_listener)
 	follow_mob()
 
 /mob/camera/disease/proc/follow_next(reverse = FALSE)

code/modules/assembly/infrared.dm

@@ -10,7 +10,7 @@
 	var/maxlength = 8
 	var/list/obj/effect/beam/i_beam/beams
 	var/olddir = 0
-	var/datum/component/redirect/listener
+	var/turf/listeningTo
 	var/hearing_range = 3
 
 /obj/item/assembly/infra/Initialize()
@@ -33,7 +33,7 @@
 
 /obj/item/assembly/infra/Destroy()
 	STOP_PROCESSING(SSobj, src)
-	QDEL_NULL(listener)
+	listeningTo = null
 	QDEL_LIST(beams)
 	. = ..()
 
@@ -163,8 +163,12 @@
 	next_activate =  world.time + 30
 
 /obj/item/assembly/infra/proc/switchListener(turf/newloc)
-	QDEL_NULL(listener)
-	listener = newloc.AddComponent(/datum/component/redirect, list(COMSIG_ATOM_EXITED = CALLBACK(src, .proc/check_exit)))
+	if(listeningTo == newloc)
+		return
+	if(listeningTo)
+		UnregisterSignal(listeningTo, COMSIG_ATOM_EXITED)
+	RegisterSignal(newloc, COMSIG_ATOM_EXITED, .proc/check_exit)
+	listeningTo = newloc
 
 /obj/item/assembly/infra/proc/check_exit(datum/source, atom/movable/offender)
 	if(QDELETED(src))

code/modules/clothing/gloves/_gloves.dm

@@ -14,7 +14,7 @@
 
 /obj/item/clothing/gloves/ComponentInitialize()
 	. = ..()
-	AddComponent(/datum/component/redirect, list(COMSIG_COMPONENT_CLEAN_ACT = CALLBACK(src, .proc/clean_blood)))
+	RegisterSignal(src, COMSIG_COMPONENT_CLEAN_ACT, .proc/clean_blood)
 
 /obj/item/clothing/gloves/proc/clean_blood(datum/source, strength)
 	if(strength < CLEAN_STRENGTH_BLOOD)

code/modules/clothing/shoes/_shoes.dm

@@ -21,7 +21,7 @@
 
 /obj/item/clothing/shoes/ComponentInitialize()
 	. = ..()
-	AddComponent(/datum/component/redirect, list(COMSIG_COMPONENT_CLEAN_ACT = CALLBACK(src, .proc/clean_blood)))
+	RegisterSignal(src, COMSIG_COMPONENT_CLEAN_ACT, .proc/clean_blood)
 
 /obj/item/clothing/shoes/suicide_act(mob/living/carbon/user)
 	if(rand(2)>1)

code/modules/clothing/spacesuits/hardsuit.dm

@@ -605,7 +605,6 @@
 	armor = list("melee" = 30, "bullet" = 5, "laser" = 5, "energy" = 0, "bomb" = 50, "bio" = 100, "rad" = 100, "fire" = 100, "acid" = 75)
 	item_color = "ancient"
 	resistance_flags = FIRE_PROOF
-	var/datum/component/mobhook
 
 /obj/item/clothing/suit/space/hardsuit/ancient
 	name = "prototype RIG hardsuit"
@@ -617,7 +616,7 @@
 	helmettype = /obj/item/clothing/head/helmet/space/hardsuit/ancient
 	resistance_flags = FIRE_PROOF
 	var/footstep = 1
-	var/datum/component/mobhook
+	var/mob/listeningTo
 
 /obj/item/clothing/suit/space/hardsuit/ancient/mason
 	name = "M.A.S.O.N RIG"
@@ -674,20 +673,24 @@
 
 /obj/item/clothing/suit/space/hardsuit/ancient/equipped(mob/user, slot)
 	. = ..()
-	if (slot == SLOT_WEAR_SUIT)
-		if (mobhook && mobhook.parent != user)
-			QDEL_NULL(mobhook)
-		if (!mobhook)
-			mobhook = user.AddComponent(/datum/component/redirect, list(COMSIG_MOVABLE_MOVED = CALLBACK(src, .proc/on_mob_move)))
-	else
-		QDEL_NULL(mobhook)
+	if(slot != SLOT_WEAR_SUIT)
+		if(listeningTo)
+			UnregisterSignal(listeningTo, COMSIG_MOVABLE_MOVED)
+		return
+	if(listeningTo == user)
+		return
+	if(listeningTo)
+		UnregisterSignal(listeningTo, COMSIG_MOVABLE_MOVED)
+	RegisterSignal(user, COMSIG_MOVABLE_MOVED, .proc/on_mob_move)
+	listeningTo = user
 
 /obj/item/clothing/suit/space/hardsuit/ancient/dropped()
 	. = ..()
-	QDEL_NULL(mobhook)
+	if(listeningTo)
+		UnregisterSignal(listeningTo, COMSIG_MOVABLE_MOVED)
 
 /obj/item/clothing/suit/space/hardsuit/ancient/Destroy()
-	QDEL_NULL(mobhook) // mobhook is not our component
+	listeningTo = null
 	return ..()
 
 /////////////SHIELDED//////////////////////////////////

code/modules/fields/fields.dm

@@ -283,7 +283,7 @@
 	var/field_type = /datum/proximity_monitor/advanced/debug
 	var/operating = FALSE
 	var/datum/proximity_monitor/advanced/current = null
-	var/datum/component/mobhook
+	var/mob/listeningTo
 
 /obj/item/multitool/field_debug/Initialize()
 	. = ..()
@@ -292,7 +292,7 @@
 /obj/item/multitool/field_debug/Destroy()
 	STOP_PROCESSING(SSobj, src)
 	QDEL_NULL(current)
-	QDEL_NULL(mobhook)
+	listeningTo = null
 	return ..()
 
 /obj/item/multitool/field_debug/proc/setup_debug_field()
@@ -303,16 +303,20 @@
 /obj/item/multitool/field_debug/attack_self(mob/user)
 	operating = !operating
 	to_chat(user, "You turn [src] [operating? "on":"off"].")
-	QDEL_NULL(mobhook)
+	UnregisterSignal(listeningTo, COMSIG_MOVABLE_MOVED)
+	listeningTo = null
 	if(!istype(current) && operating)
-		mobhook = user.AddComponent(/datum/component/redirect, list(COMSIG_MOVABLE_MOVED = CALLBACK(src, .proc/on_mob_move)))
+		RegisterSignal(user, COMSIG_MOVABLE_MOVED, .proc/on_mob_move)
+		listeningTo = user
 		setup_debug_field()
 	else if(!operating)
 		QDEL_NULL(current)
 
 /obj/item/multitool/field_debug/dropped()
 	. = ..()
-	QDEL_NULL(mobhook)
+	if(listeningTo)
+		UnregisterSignal(listeningTo, COMSIG_MOVABLE_MOVED)
+		listeningTo = null
 
 /obj/item/multitool/field_debug/proc/on_mob_move()
 	check_turf(get_turf(src))

code/modules/mob/living/carbon/human/human.dm

@@ -32,7 +32,7 @@
 	if(CONFIG_GET(flag/disable_stambuffer))
 		togglesprint()
 
-	AddComponent(/datum/component/redirect, list(COMSIG_COMPONENT_CLEAN_ACT = CALLBACK(src, .proc/clean_blood)))
+	RegisterSignal(src, COMSIG_COMPONENT_CLEAN_ACT, .proc/clean_blood)
 
 
 /mob/living/carbon/human/ComponentInitialize()

code/modules/projectiles/guns/misc/beam_rifle.dm

@@ -45,7 +45,7 @@
 	var/aiming_lastangle = 0
 	var/mob/current_user = null
 	var/list/obj/effect/projectile/tracer/current_tracers
-	
+
 	var/structure_piercing = 1
 	var/structure_bleed_coeff = 0.7
 	var/wall_pierce_amount = 0
@@ -76,7 +76,7 @@
 	var/static/image/drained_overlay = image(icon = 'icons/obj/guns/energy.dmi', icon_state = "esniper_empty")
 
 	var/datum/action/item_action/zoom_lock_action/zoom_lock_action
-	var/datum/component/mobhook
+	var/mob/listeningTo
 
 /obj/item/gun/energy/beam_rifle/debug
 	delay = 0
@@ -172,7 +172,7 @@
 	STOP_PROCESSING(SSfastprocess, src)
 	set_user(null)
 	QDEL_LIST(current_tracers)
-	QDEL_NULL(mobhook)
+	listeningTo = null
 	return ..()
 
 /obj/item/gun/energy/beam_rifle/emp_act(severity)
@@ -259,14 +259,17 @@
 	if(user == current_user)
 		return
 	stop_aiming(current_user)
-	QDEL_NULL(mobhook)
+	if(listeningTo)
+		UnregisterSignal(listeningTo, COMSIG_MOVABLE_MOVED)
+		listeningTo = null
 	if(istype(current_user))
 		LAZYREMOVE(current_user.mousemove_intercept_objects, src)
 		current_user = null
 	if(istype(user))
 		current_user = user
 		LAZYOR(current_user.mousemove_intercept_objects, src)
-		mobhook = user.AddComponent(/datum/component/redirect, list(COMSIG_MOVABLE_MOVED = CALLBACK(src, .proc/on_mob_move)))
+		RegisterSignal(user, COMSIG_MOVABLE_MOVED, .proc/on_mob_move)
+		listeningTo = user
 
 /obj/item/gun/energy/beam_rifle/onMouseDrag(src_object, over_object, src_location, over_location, params, mob)
 	if(aiming)

code/modules/research/xenobiology/crossbreeding/_status_effects.dm

@@ -64,10 +64,9 @@
 	var/interrupted = FALSE
 	var/mob/target
 	var/icon/bluespace
-	var/datum/weakref/redirect_component
 
 /datum/status_effect/slimerecall/on_apply()
-	redirect_component = WEAKREF(owner.AddComponent(/datum/component/redirect, list(COMSIG_LIVING_RESIST = CALLBACK(src, .proc/resistField))))
+	RegisterSignal(owner, COMSIG_LIVING_RESIST, .proc/resistField)
 	to_chat(owner, "<span class='danger'>You feel a sudden tug from an unknown force, and feel a pull to bluespace!</span>")
 	to_chat(owner, "<span class='notice'>Resist if you wish avoid the force!</span>")
 	bluespace = icon('icons/effects/effects.dmi',"chronofield")
@@ -77,9 +76,9 @@
 /datum/status_effect/slimerecall/proc/resistField()
 	interrupted = TRUE
 	owner.remove_status_effect(src)
+
 /datum/status_effect/slimerecall/on_remove()
-	qdel(redirect_component.resolve())
-	redirect_component = null
+	UnregisterSignal(owner, COMSIG_LIVING_RESIST)
 	owner.cut_overlay(bluespace)
 	if(interrupted || !ismob(target))
 		to_chat(owner, "<span class='warning'>The bluespace tug fades away, and you feel that the force has passed you by.</span>")
@@ -98,10 +97,9 @@
 	duration = -1 //Will remove self when block breaks.
 	alert_type = /obj/screen/alert/status_effect/freon/stasis
 	var/obj/structure/ice_stasis/cube
-	var/datum/weakref/redirect_component
 
 /datum/status_effect/frozenstasis/on_apply()
-	redirect_component = WEAKREF(owner.AddComponent(/datum/component/redirect, list(COMSIG_LIVING_RESIST = CALLBACK(src, .proc/breakCube))))
+	RegisterSignal(owner, COMSIG_LIVING_RESIST, .proc/breakCube)
 	cube = new /obj/structure/ice_stasis(get_turf(owner))
 	owner.forceMove(cube)
 	owner.status_flags |= GODMODE
@@ -118,8 +116,7 @@
 	if(cube)
 		qdel(cube)
 	owner.status_flags &= ~GODMODE
-	qdel(redirect_component.resolve())
-	redirect_component = null
+	UnregisterSignal(owner, COMSIG_LIVING_RESIST)
 
 /datum/status_effect/slime_clone
 	id = "slime_cloned"

code/modules/research/xenobiology/xenobio_camera.dm

@@ -29,8 +29,6 @@
 	var/datum/action/innate/slime_scan/scan_action
 	var/datum/action/innate/feed_potion/potion_action
 
-	var/datum/component/redirect/listener
-
 	var/list/stored_slimes
 	var/obj/item/slimepotion/slime/current_potion
 	var/max_slimes = 5
@@ -50,7 +48,7 @@
 	scan_action = new
 	potion_action = new
 	stored_slimes = list()
-	listener = AddComponent(/datum/component/redirect, list(COMSIG_ATOM_CONTENTS_DEL = CALLBACK(src, .proc/on_contents_del)))
+	RegisterSignal(src, COMSIG_ATOM_CONTENTS_DEL, .proc/on_contents_del)
 
 /obj/machinery/computer/camera_advanced/xenobio/Destroy()
 	stored_slimes = null

code/modules/unit_tests/_unit_tests.dm

@@ -2,6 +2,7 @@
 //Keep this sorted alphabetically
 
 #ifdef UNIT_TESTS
+#include "component_tests.dm"
 #include "reagent_id_typos.dm"
 #include "reagent_recipe_collisions.dm"
 #include "spawn_humans.dm"

code/modules/unit_tests/component_tests.dm

@@ -0,0 +1,12 @@
+/datum/unit_test/component_duping/Run()
+	var/list/bad_dms = list()
+	var/list/bad_dts = list()
+	for(var/t in typesof(/datum/component))
+		var/datum/component/comp = t
+		if(!isnum(initial(comp.dupe_mode)))
+			bad_dms += t
+		var/dupe_type = initial(comp.dupe_type)
+		if(dupe_type && !ispath(dupe_type))
+			bad_dts += t
+	if(length(bad_dms) || length(bad_dts))
+		Fail("Components with invalid dupe modes: ([bad_dms.Join(",")]) ||| Components with invalid dupe types: ([bad_dts.Join(",")])")