refactor: Unified Blood Adjust

code/__DEFINES/dcs/signals.dm

@@ -618,6 +618,12 @@
 #define COMSIG_LIVING_CAN_TRACK "mob_cantrack"
 	#define COMPONENT_CANT_TRACK (1<<0)
 
+/// Source: /mob/living/adjustBloodLoss(amount)
+#define COMSIG_LIVING_BLOOD_ADJUST "living_blood_adjust"
+	#define COMPONENT_PREVENT_BLOODLOSS	(1<<0)
+/// Source: /mob/living/adjustBloodLoss(amount)
+#define COMSIG_LIVING_BLOOD_ADJUSTED "living_blood_adjusted"
+
 /// From /mob/add_language() (language_name)
 #define COMSIG_MOB_LANGUAGE_ADD		"mob_language_add"
 /// From /mob/remove_language() (language_name)

code/datums/components/aura_healing.dm

@@ -175,7 +175,7 @@
 			animal_candidate.adjustHealth(-simple_heal * seconds_per_tick, updating_health = FALSE)
 
 		if(!HAS_TRAIT(candidate, TRAIT_NO_BLOOD_RESTORE) && candidate.blood_volume < BLOOD_VOLUME_NORMAL)
-			candidate.blood_volume += blood_heal * seconds_per_tick
+			candidate.adjustBloodLoss(-(blood_heal * seconds_per_tick))
 
 		var/external_organ_heal_done = FALSE
 		if(ishuman(candidate))

code/datums/diseases/viruses/advance/symptoms/blood.dm

@@ -35,6 +35,6 @@ Bonus
 			if(prob(10))
 				to_chat(affected, span_notice("You can hear own heartbeat"))
 			if(!HAS_TRAIT(affected, TRAIT_NO_BLOOD) && !HAS_TRAIT(affected, TRAIT_NO_BLOOD_RESTORE) && affected.blood_volume < BLOOD_VOLUME_NORMAL)
-				affected.blood_volume += 0.4
+				affected.adjustBloodLoss(-0.4)
 				affected.adjust_nutrition(-2)
 

code/datums/rituals.dm

@@ -460,7 +460,7 @@
 	LAZYADD(invokers, invoker)
 
 	for(var/mob/living/carbon/human/summoner as anything in invokers)
-		summoner.blood_volume -= (summoner.blood_volume * 0.20)
+		summoner.adjustBloodLoss(summoner.blood_volume * 0.20)
 		summoner.apply_damage(25, def_zone = pick(BODY_ZONE_L_ARM, BODY_ZONE_R_ARM))
 
 	human.forceMove(ritual_object)

code/game/gamemodes/clockwork/clockwork_structures.dm

@@ -206,7 +206,7 @@
 					M.adjustHealth(-8)
 
 			if(ishuman(L) && !HAS_TRAIT(L, TRAIT_NO_BLOOD_RESTORE) && L.blood_volume < BLOOD_VOLUME_NORMAL)
-				L.blood_volume += 1
+				L.adjustBloodLoss(-1)
 
 
 /obj/structure/clockwork/functional/beacon/Destroy()

code/game/gamemodes/cult/blood_magic.dm

@@ -723,7 +723,7 @@
 					if(H.blood_volume < BLOOD_VOLUME_SAFE)
 						var/restore_blood = BLOOD_VOLUME_SAFE - H.blood_volume
 						if(uses * 2 < restore_blood)
-							H.blood_volume += uses * 2
+							H.adjustBloodLoss(-(uses * 2))
 							to_chat(user, "<span class='danger'>You use the last of your charges to restore what blood you could, and the spell dissipates!</span>")
 							uses = 0
 							return ..()

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

@@ -148,7 +148,7 @@
 			if(update)
 				H.updatehealth()
 			if(H.blood_volume < BLOOD_VOLUME_NORMAL)
-				H.blood_volume += 0.5
+				H.adjustBloodLoss(-0.5)
 
 	if(!is_vamp && H.nutrition < NUTRITION_LEVEL_STARVING + 50)
 		H.adjustBruteLoss(2)

code/modules/reagents/chemistry/reagents/medicine.dm

@@ -295,7 +295,8 @@
 		var/mob/living/carbon/human/H = M
 		//do not restore blood on things with no blood by nature.
 		if(!HAS_TRAIT(H, TRAIT_NO_BLOOD) && !HAS_TRAIT(H, TRAIT_NO_BLOOD_RESTORE) && H.blood_volume < BLOOD_VOLUME_NORMAL)
-			H.blood_volume += 1
+			H.adjustBloodLoss(-1)
+
 	return ..() | update_flags
 
 /datum/reagent/medicine/synthflesh
@@ -1428,7 +1429,7 @@
 					for(var/obj/item/organ/internal/I as anything in M.internal_organs) // 56 healing to all internal organs.
 						I.heal_internal_damage(8)
 					if(!HAS_TRAIT(H, TRAIT_NO_BLOOD_RESTORE) && H.blood_volume < BLOOD_VOLUME_NORMAL * 0.9)// If below 90% blood, regenerate 210 units total
-						H.blood_volume += 30
+						H.adjustBloodLoss(-30)
 					for(var/datum/disease/critical/heart_failure/HF in H.diseases)
 						HF.cure() //Won't fix a stopped heart, but it will sure fix a critical one. Shock is not fixed as healing will fix it
 				if(M.health < 40)

code/modules/reagents/chemistry/reagents/misc.dm

@@ -165,7 +165,8 @@
 	if(ishuman(M))
 		var/mob/living/carbon/human/H = M
 		if(!HAS_TRAIT(H, TRAIT_NO_BLOOD) && !HAS_TRAIT(H, TRAIT_NO_BLOOD_RESTORE) && H.blood_volume < BLOOD_VOLUME_NORMAL)
-			H.blood_volume += 0.8
+			H.adjustBloodLoss(-0.8)
+
 	return ..()
 
 /datum/reagent/iron/reaction_mob(mob/living/M, method=REAGENT_TOUCH, volume)

code/modules/surgery/organs/blood.dm

@@ -24,7 +24,7 @@
 
 	if(bodytemperature >= TCRYO && !HAS_TRAIT(src, TRAIT_NO_CLONE)) //cryosleep or husked people do not pump the blood.
 		if(!HAS_TRAIT(src, TRAIT_NO_BLOOD_RESTORE) && blood_volume < BLOOD_VOLUME_NORMAL)
-			blood_volume += 0.1 // regenerate blood VERY slowly
+			adjustBloodLoss(-0.1) // regenerate blood VERY slowly
 
 
 		//Effects of bloodloss
@@ -134,6 +134,23 @@
 		return .
 	blood_reagent.reaction_turf(loc, amt * EXOTIC_BLEED_MULTIPLIER, dna.species.blood_color)
 
+/mob/living/proc/adjustBloodLoss(amount = 0)
+	if(HAS_TRAIT(src, TRAIT_NO_BLOOD))
+		return FALSE
+
+	if(SEND_SIGNAL(src, COMSIG_LIVING_BLOOD_ADJUST, amount, bleed_mode_affect) & COMPONENT_PREVENT_BLOODLOSS)
+		return FALSE
+
+	blood_volume = max(round(blood_volume - amount, DAMAGE_PRECISION), 0)
+	SEND_SIGNAL(src, COMSIG_LIVING_BLOOD_ADJUSTED, amount, bleed_mode_affect)
+
+	return TRUE
+
+/mob/living/carbon/human/adjustBloodLoss(amount = 0, bleed_mode_affect = FALSE)
+	if(bleed_mode_affect)
+		amount *= physiology.bleed_mod
+
+	return ..(amount)
 
 /mob/living/proc/restore_blood()
 	blood_volume = initial(blood_volume)
@@ -160,7 +177,7 @@
 	if(!blood_id)
 		return 0
 
-	blood_volume -= amount
+	adjustBloodLoss(amount)
 
 	var/list/blood_data = get_blood_data(blood_id)