Pipe Clamps, Shutoff Valves, and Leaking Tubes, oh my. (#6279)

* Pipe Clamps, Shutoff Valves, and Leaking Tubes, oh my.

* Fix processing fuckery.

* Deal with Forever-Seals, and Infini-clamps.

* Update clamp.dm

code/ATMOSPHERICS/components/shutoff.dm

@@ -0,0 +1,50 @@
+/obj/machinery/atmospherics/valve/shutoff
+	icon = 'icons/atmos/clamp.dmi'
+	icon_state = "map_vclamp0"
+
+	name = "automatic shutoff valve"
+	desc = "An automatic valve with control circuitry and pipe integrity sensor, capable of automatically isolating damaged segments of the pipe network."
+	var/close_on_leaks = TRUE	// If false it will be always open
+	level = 1
+	connect_types = CONNECT_TYPE_SCRUBBER | CONNECT_TYPE_SUPPLY | CONNECT_TYPE_REGULAR
+
+/obj/machinery/atmospherics/valve/shutoff/update_icon()
+	icon_state = "vclamp[open]"
+
+/obj/machinery/atmospherics/valve/shutoff/examine(var/mob/user)
+	..()
+	to_chat(user, "The automatic shutoff circuit is [close_on_leaks ? "enabled" : "disabled"].")
+
+/obj/machinery/atmospherics/valve/shutoff/Initialize()
+	. = ..()
+	open()
+	hide(1)
+
+/obj/machinery/atmospherics/valve/shutoff/attack_ai(mob/user as mob)
+	return src.attack_hand(user)
+
+/obj/machinery/atmospherics/valve/shutoff/attack_hand(var/mob/user)
+	src.add_fingerprint(usr)
+	update_icon(1)
+	close_on_leaks = !close_on_leaks
+	to_chat(user, "You [close_on_leaks ? "enable" : "disable"] the automatic shutoff circuit.")
+	return TRUE
+
+/obj/machinery/atmospherics/valve/shutoff/process()
+	..()
+
+	if (!network_node1 || !network_node2)
+		if(open)
+			close()
+		return
+
+	if (!close_on_leaks)
+		if (!open)
+			open()
+		return
+
+	if (network_node1.leaks.len || network_node2.leaks.len)
+		if (open)
+			close()
+	else if (!open)
+		open()