Patch rework (#13062)

* Patch Rework Part 1

* applicator

* fixes

* fixes

* temperature settings

* single application patches

* additional

* new line fix

* fox  is a derp sometimes

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

@@ -9,12 +9,18 @@
 		qdel(item)
 	QDEL_LIST(internal_organs)
 	QDEL_LIST(stomach_contents)
+	QDEL_LIST(processing_patches)
 	var/mob/living/simple_animal/borer/B = has_brain_worms()
 	if(B)
 		B.leave_host()
 		qdel(B)
 	return ..()
 
+/mob/living/carbon/handle_atom_del(atom/A)
+	if(A in processing_patches)
+		processing_patches -= A
+	return ..()
+
 /mob/living/carbon/blob_act(obj/structure/blob/B)
 	if(stat == DEAD)
 		return
@@ -1073,8 +1079,9 @@ so that different stomachs can handle things in different ways VB*/
 		if(can_taste_container)
 			taste(toEat.reagents)
 		var/fraction = min(this_bite/toEat.reagents.total_volume, 1)
-		toEat.reagents.reaction(src, toEat.apply_type, fraction)
-		toEat.reagents.trans_to(src, this_bite*toEat.transfer_efficiency)
+		if(fraction)
+			toEat.reagents.reaction(src, toEat.apply_type, fraction)
+			toEat.reagents.trans_to(src, this_bite*toEat.transfer_efficiency)
 
 /mob/living/carbon/get_access()
 	. = ..()

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

@@ -2,6 +2,7 @@
 	gender = MALE
 	pressure_resistance = 15
 	var/list/stomach_contents = list()
+	var/list/processing_patches = list()
 	var/list/internal_organs	= list()
 	var/list/internal_organs_slot	= list()	//Same as above, but stores "slot ID" - "organ" pairs for easy access.
 	var/antibodies = 0

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

@@ -13,6 +13,7 @@
 		for(var/obj/item/organ/internal/O in internal_organs)
 			O.on_life()
 
+	handle_patches()
 	handle_changeling()
 	handle_wetness(times_fired)
 
@@ -438,3 +439,22 @@
 			overlay_fullscreen("brute", /obj/screen/fullscreen/brute, severity)
 		else
 			clear_fullscreen("brute")
+
+/mob/living/carbon/proc/handle_patches()
+	if(LAZYLEN(processing_patches))
+		var/multiple_patch_multiplier = processing_patches.len > 1 ? (processing_patches.len * 1.5) : 1
+		var/applied_amount = 0.35 * multiple_patch_multiplier
+
+		for(var/patch in processing_patches)
+			var/obj/item/reagent_containers/food/pill/patch/P = patch
+
+			if(P.reagents && P.reagents.total_volume)
+				var/fractional_applied_amount = applied_amount  / P.reagents.total_volume
+				P.reagents.reaction(src, REAGENT_TOUCH, fractional_applied_amount, P.needs_to_apply_reagents)
+				P.needs_to_apply_reagents = FALSE
+				P.reagents.trans_to(src, applied_amount * 0.5)
+				P.reagents.remove_any(applied_amount * 0.5)
+			else
+				if(!P.reagents || P.reagents.total_volume <= 0)
+					processing_patches -= P
+					qdel(P)

code/modules/mob/living/living.dm

@@ -406,6 +406,8 @@
 			QDEL_LIST(C.reagents.addiction_list)
 			C.reagents.addiction_threshold_accumulated.Cut()
 
+		QDEL_LIST(C.processing_patches)
+
 // rejuvenate: Called by `revive` to get the mob into a revivable state
 // the admin "rejuvenate" command calls `revive`, not this proc.
 /mob/living/proc/rejuvenate()