initial element

code/datums/components/earhealing.dm

@@ -1,30 +0,0 @@
-// An item worn in the ear slot with this component will heal your ears each
-// Life() tick, even if normally your ears would be too damaged to heal.
-
-/datum/component/earhealing
-	var/mob/living/carbon/wearer
-
-/datum/component/earhealing/Initialize()
-	if(!isitem(parent))
-		return COMPONENT_INCOMPATIBLE
-	RegisterSignal(parent, list(COMSIG_ITEM_EQUIPPED, COMSIG_ITEM_DROPPED), .proc/equippedChanged)
-
-/datum/component/earhealing/proc/equippedChanged(datum/source, mob/living/carbon/user, slot)
-	if (slot == SLOT_EARS && istype(user))
-		if (!wearer)
-			START_PROCESSING(SSobj, src)
-		wearer = user
-	else
-		if (wearer)
-			STOP_PROCESSING(SSobj, src)
-		wearer = null
-
-/datum/component/earhealing/process()
-	if (!wearer)
-		STOP_PROCESSING(SSobj, src)
-		return
-	if(!HAS_TRAIT(wearer, TRAIT_DEAF))
-		var/obj/item/organ/ears/ears = wearer.getorganslot(ORGAN_SLOT_EARS)
-		if (ears)
-			ears.deaf = max(ears.deaf - 1, (ears.damage < ears.maxHealth ? 0 : 1)) // Do not clear deafness if our ears are too damaged
-			ears.damage = max(ears.damage - 0.1, 0)

code/datums/components/mood.dm

@@ -280,7 +280,7 @@
 	var/datum/hud/hud = owner.hud_used
 	screen_obj = new
 	hud.infodisplay += screen_obj
-	RegisterSignal(hud, COMSIG_PARENT_QDELETED, .proc/unmodify_hud)
+	RegisterSignal(hud, COMSIG_PARENT_QDELETING, .proc/unmodify_hud)
 	RegisterSignal(screen_obj, COMSIG_CLICK, .proc/hud_click)
 
 /datum/component/mood/proc/unmodify_hud(datum/source)

code/datums/elements/_element.dm

@@ -0,0 +1,29 @@
+/datum/element
+	var/element_flags = NONE
+
+/datum/element/proc/Attach(datum/target)
+	if(type == /datum/element)
+		return ELEMENT_INCOMPATIBLE
+	if(element_flags & ELEMENT_DETACH)
+		RegisterSignal(target, COMSIG_PARENT_QDELETING, .proc/Detach)
+
+/datum/element/proc/Detach(datum/source, force)
+	UnregisterSignal(source, COMSIG_PARENT_QDELETING)
+
+/datum/element/Destroy(force)
+	if(!force)
+		return QDEL_HINT_LETMELIVE
+	SSdcs.elements_by_type -= type
+	return ..()
+
+//DATUM PROCS
+
+/datum/proc/AddElement(eletype, ...)
+	var/datum/element/ele = SSdcs.GetElement(eletype)
+	args[1] = src
+	if(ele.Attach(arglist(args)) == ELEMENT_INCOMPATIBLE)
+		CRASH("Incompatible [eletype] assigned to a [type]! args: [json_encode(args)]")
+
+/datum/proc/RemoveElement(eletype)
+	var/datum/element/ele = SSdcs.GetElement(eletype)
+	ele.Detach(src)

code/datums/elements/cleaning.dm

@@ -1,19 +1,18 @@
-/datum/component/cleaning
-	dupe_mode = COMPONENT_DUPE_UNIQUE_PASSARGS
+/datum/element/cleaning/Attach(datum/target)
+	. = ..()
+	if(!ismovableatom(target))
+		return ELEMENT_INCOMPATIBLE
+	RegisterSignal(target, COMSIG_MOVABLE_MOVED, .proc/Clean)
 
-/datum/component/cleaning/Initialize()
-	if(!ismovableatom(parent))
-		return COMPONENT_INCOMPATIBLE
-	RegisterSignal(parent, list(COMSIG_MOVABLE_MOVED), .proc/Clean)
+/datum/element/cleaning/Detach(datum/target)
+	. = ..()
+	UnregisterSignal(target, COMSIG_MOVABLE_MOVED)
 
-/datum/component/cleaning/proc/Clean()
-	var/atom/movable/AM = parent
-	var/turf/tile = AM.loc
-	if(!isturf(tile))
-		return
-
-	SEND_SIGNAL(tile, COMSIG_COMPONENT_CLEAN_ACT, CLEAN_STRENGTH_BLOOD)
-	for(var/A in tile)
+/datum/element/cleaning/proc/Clean(datum/source)
+	var/atom/movable/AM = source
+	var/turf/T = AM.loc
+	SEND_SIGNAL(T, COMSIG_COMPONENT_CLEAN_ACT, CLEAN_WEAK)
+	for(var/A in T)
 		if(is_cleanable(A))
 			qdel(A)
 		else if(istype(A, /obj/item))
@@ -36,4 +35,4 @@
 				SEND_SIGNAL(cleaned_human, COMSIG_COMPONENT_CLEAN_ACT, CLEAN_STRENGTH_BLOOD)
 				cleaned_human.wash_cream()
 				cleaned_human.regenerate_icons()
-				to_chat(cleaned_human, "<span class='danger'>[AM] cleans your face!</span>")
+				to_chat(cleaned_human, "<span class='danger'>[src] cleans your face!</span>")

code/datums/elements/earhealing.dm

@@ -0,0 +1,37 @@
+
+/datum/element/earhealing
+	element_flags = ELEMENT_DETACH
+	var/list/user_by_item = list()
+
+/datum/element/earhealing/New()
+	START_PROCESSING(SSdcs, src)
+
+/datum/element/earhealing/Attach(datum/target)
+	. = ..()
+	if(!isitem(target))
+		return ELEMENT_INCOMPATIBLE
+
+	RegisterSignal(target, list(COMSIG_ITEM_EQUIPPED, COMSIG_ITEM_DROPPED), .proc/equippedChanged)
+
+/datum/element/earhealing/Detach(datum/target)
+	. = ..()
+	UnregisterSignal(target, list(COMSIG_ITEM_EQUIPPED, COMSIG_ITEM_DROPPED))
+	user_by_item -= target
+
+/datum/element/earhealing/proc/equippedChanged(datum/source, mob/living/carbon/user, slot)
+	if(slot == SLOT_EARS && istype(user))
+		user_by_item[source] = user
+	else
+		user_by_item -= source
+
+/datum/element/earhealing/process()
+	for(var/i in user_by_item)
+		var/mob/living/carbon/user = user_by_item[i]
+		if(HAS_TRAIT(user, TRAIT_DEAF))
+			continue
+		var/obj/item/organ/ears/ears = user.getorganslot(ORGAN_SLOT_EARS)
+		if(!ears)
+			continue
+		ears.deaf = max(ears.deaf - 0.25, (ears.damage < ears.maxHealth ? 0 : 1)) // Do not clear deafness if our ears are too damaged
+		ears.damage = max(ears.damage - 0.025, 0)
+		CHECK_TICK