Biosuit Updates

code/datums/disease.dm

@@ -104,16 +104,20 @@ GLOBAL_LIST_INIT(diseases, typesof(/datum/disease) - /datum/disease)
 		how_spread = force_spread
 
 	if(how_spread == SPECIAL || how_spread == NON_CONTAGIOUS || how_spread == BLOOD)//does not spread
-		return
+		return FALSE
 
 	if(stage < contagious_period) //the disease is not contagious at this stage
-		return
+		return FALSE
 
 	if(!source)//no holder specified
 		if(affected_mob)//no mob affected holder
 			source = affected_mob
 		else //no source and no mob affected. Rogue disease. Break
-			return
+			return FALSE
+
+	var/mob/source_mob = source
+	if(istype(source_mob) && !source_mob.can_pass_disease())
+		return FALSE
 
 	var/check_range = airborne_range//defaults to airborne - range 2
 
@@ -122,7 +126,7 @@ GLOBAL_LIST_INIT(diseases, typesof(/datum/disease) - /datum/disease)
 
 	if(isturf(source.loc))
 		for(var/mob/living/carbon/victim in oview(check_range, source))
-			if(isturf(victim.loc))
+			if(isturf(victim.loc) && victim.can_pass_disease())
 				if(AStar(source.loc, victim.loc, /turf/proc/AdjacentTurfs, /turf/proc/Distance, check_range))
 					victim.contract_disease(src, 0, 1, force_spread)
 

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

@@ -156,30 +156,66 @@
 
 	. = ..()
 
-/mob/living/carbon/attack_hand(mob/M as mob)
-	if(!istype(M, /mob/living/carbon)) return
+/mob/living/carbon/attack_hand(mob/target_mob as mob)
+	if(!istype(target_mob, /mob/living/carbon)) return
 
-	if(M.mob_flags & SURGERY_MODE_ON && M.a_intent & (INTENT_HELP|INTENT_DISARM))
-		var/datum/surgery/current_surgery = active_surgeries[M.zone_selected]
+	if(target_mob.mob_flags & SURGERY_MODE_ON && target_mob.a_intent & (INTENT_HELP|INTENT_DISARM))
+		var/datum/surgery/current_surgery = active_surgeries[target_mob.zone_selected]
 		if(current_surgery)
-			if(current_surgery.attempt_next_step(M, null))
+			if(current_surgery.attempt_next_step(target_mob, null))
 				return TRUE
 		else
-			var/obj/limb/affecting = get_limb(check_zone(M.zone_selected))
-			if(affecting && initiate_surgery_moment(null, src, affecting, M))
+			var/obj/limb/affecting = get_limb(check_zone(target_mob.zone_selected))
+			if(affecting && initiate_surgery_moment(null, src, affecting, target_mob))
 				return TRUE
 
-	for(var/datum/disease/D in viruses)
-		if(D.spread_by_touch())
-			M.contract_disease(D, 0, 1, CONTACT_HANDS)
+	if(can_pass_disease() && target_mob.can_pass_disease())
+		for(var/datum/disease/virus in viruses)
+			if(virus.spread_by_touch())
+				target_mob.contract_disease(virus, 0, 1, CONTACT_HANDS)
 
-	for(var/datum/disease/D in M.viruses)
-		if(D.spread_by_touch())
-			contract_disease(D, 0, 1, CONTACT_HANDS)
+		for(var/datum/disease/virus in target_mob.viruses)
+			if(virus.spread_by_touch())
+				contract_disease(virus, 0, 1, CONTACT_HANDS)
 
-	M.next_move += 7 //Adds some lag to the 'attack'. Adds up to 11 in combination with click_adjacent.
+	target_mob.next_move += 7 //Adds some lag to the 'attack'. Adds up to 11 in combination with click_adjacent.
 	return
 
+/// Whether or not a mob can pass diseases to another, or receive said diseases.
+/mob/proc/can_pass_disease()
+	return TRUE
+
+/mob/living/carbon/human/can_pass_disease()
+	/// Multiplier for checked pieces.
+	var/mult = 0
+	/// Total amount of bio protection
+	var/total_prot = 0
+	/// Super bio armor
+	var/bio_hardcore = 0
+
+	var/list/worn_clothes = list()
+	worn_clothes += head
+	worn_clothes += wear_suit
+	worn_clothes += hands
+	worn_clothes += glasses
+	worn_clothes += w_uniform
+	worn_clothes += shoes
+	worn_clothes += wear_mask
+
+	for(var/obj/item/clothing/worn_item in worn_clothes)
+		total_prot = (total_prot + worn_item.armor_bio)
+		mult++
+		if(worn_item.armor_bio == CLOTHING_ARMOR_HARDCORE)
+			bio_hardcore++
+
+	if(bio_hardcore >= 2)
+		return FALSE
+
+	var/perc = (total_prot / mult)
+	if(!prob(perc))
+		return TRUE
+	return FALSE
+
 /mob/living/carbon/electrocute_act(shock_damage, obj/source, siemens_coeff = 1.0, def_zone = null)
 	if(status_flags & GODMODE) //godmode
 		return FALSE