Refactors heart attacks, unbreaks incremental cloning

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

@@ -20,7 +20,6 @@
 
 	var/pulse = PULSE_NORM	//current pulse level
 
-	var/heart_attack = 0
 	var/wetlevel = 0 //how wet the mob is
 
 	var/oxygen_alert = 0
@@ -29,4 +28,4 @@
 	var/fire_alert = 0
 
 	var/failed_last_breath = 0 //This is used to determine if the mob failed a breath. If they did fail a brath, they will attempt to breathe each tick, otherwise just once per 4 ticks.
-	var/co2overloadtime = null
+	var/co2overloadtime = null

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

@@ -99,7 +99,7 @@
 	stat = DEAD
 	SetDizzy(0)
 	SetJitter(0)
-	heart_attack = 0
+	set_heartattack(FALSE)
 
 	//Handle species-specific deaths.
 	if(species) species.handle_death(src)

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

@@ -759,9 +759,9 @@
 		if(species)
 			species_siemens_coeff = species.siemens_coeff
 		siemens_coeff = gloves_siemens_coeff * species_siemens_coeff
-	if(heart_attack)
+	if(undergoing_cardiac_arrest())
 		if(shock_damage * siemens_coeff >= 1 && prob(25))
-			heart_attack = 0
+			set_heartattack(FALSE)
 			if(stat == CONSCIOUS)
 				to_chat(src, "<span class='notice'>You feel your heart beating again!</span>")
 	. = ..()

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

@@ -1032,7 +1032,7 @@
 	if(stat == DEAD)
 		return PULSE_NONE	//that's it, you're dead, nothing can influence your pulse
 
-	if(heart_attack)
+	if(undergoing_cardiac_arrest())
 		return PULSE_NONE
 
 	var/temp = PULSE_NORM
@@ -1175,14 +1175,37 @@
 	return stuttering
 
 
+
+/mob/living/carbon/human/proc/can_heartattack()
+	if(species.flags & NO_BLOOD)
+		return FALSE
+	return TRUE
+
+/mob/living/carbon/human/proc/undergoing_cardiac_arrest()
+	if(!can_heartattack())
+		return FALSE
+	var/obj/item/organ/internal/heart/heart = get_int_organ(/obj/item/organ/internal/heart)
+	if(istype(heart) && heart.beating)
+		return FALSE
+	return TRUE
+
+/mob/living/carbon/human/proc/set_heartattack(status)
+	if(!can_heartattack())
+		return FALSE
+
+	var/obj/item/organ/internal/heart/heart = get_int_organ(/obj/item/organ/internal/heart)
+	if(!istype(heart))
+		return FALSE
+
+	heart.beating = !status
+
 /mob/living/carbon/human/proc/handle_heartattack()
-	if(!heart_attack)
+	if(!can_heartattack() || !undergoing_cardiac_arrest() || reagents.has_reagent("corazone"))
 		return
-	else
-		AdjustLoseBreath(2, bound_lower = 0, bound_upper = 3)
-		adjustOxyLoss(5)
-		Paralyse(4)
-		adjustBruteLoss(2)
+	AdjustLoseBreath(2, bound_lower = 0, bound_upper = 3)
+	adjustOxyLoss(5)
+	Paralyse(4)
+	adjustBruteLoss(2)
 
 
 

code/modules/mob/living/living.dm

@@ -377,7 +377,6 @@
 	if(iscarbon(src))
 		var/mob/living/carbon/C = src
 		C.handcuffed = initial(C.handcuffed)
-		C.heart_attack = 0
 
 		for(var/datum/disease/D in C.viruses)
 			D.cure(0)
@@ -385,6 +384,7 @@
 		// restore all of the human's blood and reset their shock stage
 		if(ishuman(src))
 			human_mob = src
+			human_mob.set_heartattack(FALSE)
 			human_mob.restore_blood()
 			human_mob.shock_stage = 0
 			human_mob.decaylevel = 0