Folders props, and adds the laser prism, receptor, and sealed doors. (#5337)

* Re-bases props, and adds the laser prism.

* Ver 1 of Puzzle Lock and Doors

* Doors

* Fix door hiccup I made, modify Prism

code/game/objects/structures/props/projectile_lock.dm

@@ -0,0 +1,53 @@
+//A locking mechanism that pulses when hit by a projectile. The base one responds to high-power lasers.
+
+/obj/structure/prop/lock
+	name = "weird lock"
+	desc = "An esoteric object that responds to.. something."
+	icon = 'icons/obj/props/prism.dmi'
+	icon_state = "lock"
+
+	var/enabled = 0
+	var/lockID = null
+
+	var/list/linked_objects = list()
+
+/obj/structure/prop/lock/Destroy()
+	if(linked_objects.len)
+		for(var/obj/O in linked_objects)
+			if(istype(O, /obj/machinery/door/blast/puzzle))
+				var/obj/machinery/door/blast/puzzle/P = O
+				P.locks -= src
+				linked_objects -= P
+	..()
+
+/obj/structure/prop/lock/proc/toggle_lock()
+	enabled = !enabled
+
+	if(enabled)
+		icon_state = "[initial(icon_state)]-active"
+	else
+		icon_state = "[initial(icon_state)]"
+
+/obj/structure/prop/lock/projectile
+	name = "beam lock"
+	desc = "An esoteric object that responds to high intensity light."
+
+	var/projectile_key = /obj/item/projectile/beam
+	var/timed = 0
+	var/timing = 0
+	var/time_limit = 1500 // In ticks. Ten is one second.
+
+	interaction_message = "<span class='notice'>The object remains inert to your touch.</span>"
+
+/obj/structure/prop/lock/projectile/bullet_act(var/obj/item/projectile/Proj)
+	if(!istype(Proj, projectile_key) || timing)
+		return
+
+	if(istype(Proj, /obj/item/projectile/beam/heavylaser/cannon) || istype(Proj, /obj/item/projectile/beam/emitter) || (Proj.damage >= 80 && Proj.damtype == BURN))
+		toggle_lock()
+		visible_message("<span class='notice'>\The [src] [enabled ? "disengages" : "engages"] its locking mechanism.</span>")
+
+		if(timed)
+			timing = 1
+			spawn(time_limit)
+				toggle_lock()