Adds PENLITE holobarriers (#39344)

Adds a simple way to quarantine individuals but doesn't make it roundstart, as it has potential to make 2 antags have a very difficult time: Bad virologists and (mainly) sentient diseases. Uses a sliver of silver because of this.

It uses the exact same proc as the MEDHUD, so it CAN be countered by buffing stealth. Virologists can also activate the free-access so long as they do it while not infected with anything bad.

That said, it has a build delay and is relatively easy to destroy. Think of it as a more obvious visual for people without huds to know "hey, I should probably avoid everyone else until I get better" and not necessarily an actual barrier device.

sprites edited by me if you like them, by someone else if you don't!

code/game/objects/items/holosign_creator.dm

@@ -84,6 +84,14 @@
 	creation_time = 0
 	max_signs = 3
 
+/obj/item/holosign_creator/medical
+	name = "\improper PENLITE barrier projector"
+	desc = "A holographic projector that creates PENLITE holobarriers. Useful during quarantines since they halt those with malicious diseases."
+	icon_state = "signmaker_med"
+	holosign_type = /obj/structure/holosign/barrier/medical
+	creation_time = 30
+	max_signs = 3
+
 /obj/item/holosign_creator/cyborg
 	name = "Energy Barrier Projector"
 	desc = "A holographic projector that creates fragile energy fields."

code/game/objects/structures/holosign.dm

@@ -97,6 +97,44 @@
 	if(istype(P, /obj/item/projectile/beam/disabler))
 		take_damage(5, BRUTE, "melee", 1)	//Disablers aren't harmful.
 
+/obj/structure/holosign/barrier/medical
+	name = "\improper PENLITE holobarrier"
+	desc = "A holobarrier that uses biometrics to detect human viruses. Denies passing to personnel with easily-detected, malicious viruses. Good for quarantines."
+	icon_state = "holo_medical"
+	alpha = 125 //lazy :)
+	layer = ABOVE_MOB_LAYER
+	var/force_allaccess = FALSE
+	var/buzzcd = 0
+
+/obj/structure/holosign/barrier/medical/examine(mob/user)
+	..()
+	to_chat(user,"<span class='notice'>The biometric scanners are <b>[force_allaccess ? "off" : "on"]</b>.</span>")
+
+/obj/structure/holosign/barrier/medical/CanPass(atom/movable/mover, turf/target)
+	icon_state = "holo_medical"
+	if(force_allaccess)
+		return TRUE
+	if(ishuman(mover))
+		var/mob/living/carbon/human/sickboi = mover
+		var/threat = sickboi.check_virus()
+		switch(threat)
+			if(DISEASE_SEVERITY_MINOR, DISEASE_SEVERITY_MEDIUM, DISEASE_SEVERITY_HARMFUL, DISEASE_SEVERITY_DANGEROUS, DISEASE_SEVERITY_BIOHAZARD)
+				if(buzzcd < world.time)
+					playsound(get_turf(src),'sound/machines/buzz-sigh.ogg',65,1,4)
+					buzzcd = (world.time + 60)
+				icon_state = "holo_medical-deny"
+				return FALSE
+			else
+				return TRUE //nice or benign diseases!
+	return TRUE
+
+/obj/structure/holosign/barrier/medical/attack_hand(mob/living/user)
+	if(CanPass(user) && user.a_intent == INTENT_HELP)
+		force_allaccess = !force_allaccess
+		to_chat(user, "<span class='warning'>You [force_allaccess ? "deactivate" : "activate"] the biometric scanners.</span>") //warning spans because you can make the station sick!
+	else
+		return ..()
+
 /obj/structure/holosign/barrier/cyborg/hacked
 	name = "Charged Energy Field"
 	desc = "A powerful energy field that blocks movement. Energy arcs off it."
@@ -130,4 +168,4 @@
 	var/mob/living/M = AM
 	M.electrocute_act(15,"Energy Barrier", safety=1)
 	shockcd = TRUE
-	addtimer(CALLBACK(src, .proc/cooldown), 5)
+	addtimer(CALLBACK(src, .proc/cooldown), 5)

code/modules/research/designs/medical_designs.dm

@@ -210,7 +210,7 @@
 	materials = list(MAT_METAL = 2000, MAT_SILVER = 1500, MAT_PLASMA = 500, MAT_TITANIUM = 1500)
 	category = list("Medical Designs")
 	departmental_flags = DEPARTMENTAL_FLAG_MEDICAL
-	
+
 /datum/design/healthanalyzer_advanced
 	name = "advanced health analyzer"
 	desc = "A hand-held body scanner able to distinguish vital signs of the subject with high accuracy."
@@ -220,7 +220,7 @@
 	materials = list(MAT_METAL = 5000, MAT_GLASS = 2500, MAT_SILVER = 2000, MAT_GOLD = 1500)
 	category = list("Medical Designs")
 	departmental_flags = DEPARTMENTAL_FLAG_MEDICAL
-	
+
 /////////////////////////////////////////
 //////////Cybernetic Implants////////////
 /////////////////////////////////////////
@@ -595,3 +595,13 @@
 	build_path = /obj/item/disk/surgery/necrotic_revival
 	category = list("Medical Designs")
 	departmental_flags = DEPARTMENTAL_FLAG_MEDICAL | DEPARTMENTAL_FLAG_SCIENCE
+
+/datum/design/holobarrier_med
+	name = "PENLITE holobarrier projector"
+	desc = "PENLITE holobarriers, a device that halts individuals with malicious diseases."
+	build_type = PROTOLATHE
+	build_path = /obj/item/holosign_creator/medical
+	materials = list(MAT_METAL = 500, MAT_GLASS = 500, MAT_SILVER = 100) //a hint of silver since it can troll 2 antags (bad viros and sentient disease)
+	id = "holobarrier_med"
+	category = list("Medical Designs")
+	departmental_flags = DEPARTMENTAL_FLAG_MEDICAL