Merge pull request #5634 from Heroman3003/grenadefix

Restricts station use of manhack grenades and seismic charges

code/game/objects/items/weapons/explosives_vr.dm

@@ -0,0 +1,17 @@
+/obj/item/weapon/plastique/seismic/locked
+	desc = "Used to dig holes in specific areas without too much extra hole. Has extra mechanism that safely implodes the bomb if it is used in close proximity to the facility."
+
+/obj/item/weapon/plastique/seismic/locked/explode(var/location)
+	if(!target)
+		target = get_atom_on_turf(src)
+	if(!target)
+		target = src
+
+	var/turf/T = get_turf(target)
+	if(T.z in using_map.map_levels)
+		target.visible_message("<span class='danger'>\The [src] lets out a loud beep as safeties trigger, before imploding and falling apart.</span>")
+		target.overlays -= image_overlay
+		qdel(src)
+		return 0
+	else
+		return ..()

code/game/objects/items/weapons/grenades/spawnergrenade_vr.dm

@@ -0,0 +1,30 @@
+/obj/item/weapon/grenade/spawnergrenade/manhacks/station/locked
+	desc = "It is set to detonate in 5 seconds. It will deploy three weaponized survey drones. This one has a safety interlock that prevents release if used while in proximity to the facility."
+	req_access = list(access_armory) //for toggling safety
+	var/locked = 1
+
+/obj/item/weapon/grenade/spawnergrenade/manhacks/station/locked/detonate()
+	if(locked)
+		var/turf/T = get_turf(src)
+		if(T.z in using_map.map_levels)
+			icon_state = initial(icon_state)
+			active = 0
+			return 0
+	return ..()
+
+/obj/item/weapon/grenade/spawnergrenade/manhacks/station/locked/attackby(obj/item/I, mob/user)
+	var/obj/item/weapon/card/id/id = I.GetID()
+	if(istype(id))
+		if(check_access(id))
+			locked = !locked
+			to_chat(user, "<span class='warning'>You [locked ? "enable" : "disable"] the safety lock on \the [src].</span>")
+		else
+			to_chat(user, "<span class='warning'>Access denied.</span>")
+		user.visible_message("<span class='notice'>[user] swipes \the [I] against \the [src].</span>")
+	else
+		return ..()
+
+/obj/item/weapon/grenade/spawnergrenade/manhacks/station/locked/emag_act(var/remaining_charges,var/mob/user)
+	..()
+	locked = !locked
+	to_chat(user, "<span class='warning'>You [locked ? "enable" : "disable"] the safety lock on \the [src]!</span>")