reorganizes gateway into its own module (#6718)

it's stargate time

citadel.dme

@@ -2387,7 +2387,6 @@
 #include "code\modules\awaymissions\bluespaceartillery.dm"
 #include "code\modules\awaymissions\corpse.dm"
 #include "code\modules\awaymissions\exile.dm"
-#include "code\modules\awaymissions\gateway.dm"
 #include "code\modules\awaymissions\loot.dm"
 #include "code\modules\awaymissions\loot_vr.dm"
 #include "code\modules\awaymissions\pamphlet.dm"
@@ -2857,6 +2856,10 @@
 #include "code\modules\games\spaceball_cards.dm"
 #include "code\modules\games\tarot.dm"
 #include "code\modules\games\unus.dm"
+#include "code\modules\gateway\stargate\stargate-away.dm"
+#include "code\modules\gateway\stargate\stargate-destination.dm"
+#include "code\modules\gateway\stargate\stargate-station.dm"
+#include "code\modules\gateway\stargate\stargate.dm"
 #include "code\modules\genetics\side_effects.dm"
 #include "code\modules\ghostroles\instantiator.dm"
 #include "code\modules\ghostroles\menu.dm"

code/modules/gateway/README.md

@@ -0,0 +1,11 @@
+# Gateway Module
+
+WIP module for a series of disjunct mechanics for shunting people across spaces.
+
+- These are unrelated to telescience module, and therefore will not be balanced by it nor will it be constructible.
+- These are mostly for map design, admin spawn, and events.
+
+## Contains
+
+- Stargates: Classic SS13 gateways with rudimentary accuracy/precision and destination settings
+- Quantum Archways: See-through & Walk-through 'line' gateways

code/modules/gateway/stargate/stargate-away.dm

@@ -0,0 +1,107 @@
+/**
+ * Preset for away destinations for the stargate system
+ */
+
+/obj/machinery/gateway/centeraway
+	density = 1
+	icon_state = "offcenter"
+	use_power = USE_POWER_OFF
+	var/calibrated = 1
+	var/list/linked = list()	//a list of the connected gateway chunks
+	var/ready = 0
+	var/obj/machinery/gateway/centeraway/stationgate = null
+
+
+/obj/machinery/gateway/centeraway/Initialize(mapload)
+	update_icon()
+	stationgate = locate(/obj/machinery/gateway/centerstation)
+	. = ..()
+	density = 1
+
+
+/obj/machinery/gateway/centeraway/update_icon()
+	if(active)
+		icon_state = "oncenter"
+		return
+	icon_state = "offcenter"
+
+/obj/machinery/gateway/centeraway/proc/detect()
+	linked = list()	//clear the list
+	var/turf/T = loc
+
+	for(var/i in GLOB.alldirs)
+		T = get_step(loc, i)
+		var/obj/machinery/gateway/G = locate(/obj/machinery/gateway) in T
+		if(G)
+			linked.Add(G)
+			continue
+
+		//this is only done if we fail to find a part
+		ready = 0
+		toggleoff()
+		break
+
+	if(linked.len == 8)
+		ready = 1
+
+
+/obj/machinery/gateway/centeraway/proc/toggleon(mob/user as mob)
+	if(!ready)			return
+	if(linked.len != 8)	return
+	if(!stationgate || !calibrated)
+		to_chat(user, SPAN_NOTICE("Error: No destination found. Please calibrate gateway."))
+		return
+
+	for(var/obj/machinery/gateway/G in linked)
+		G.active = 1
+		G.update_icon()
+	active = 1
+	update_icon()
+
+
+/obj/machinery/gateway/centeraway/proc/toggleoff()
+	for(var/obj/machinery/gateway/G in linked)
+		G.active = 0
+		G.update_icon()
+	active = 0
+	update_icon()
+
+
+/obj/machinery/gateway/centeraway/attack_hand(mob/user, list/params)
+	if(!ready)
+		detect()
+		return
+	if(!active)
+		toggleon(user)
+		return
+	toggleoff()
+
+
+/obj/machinery/gateway/centeraway/Bumped(atom/movable/M as mob|obj)
+	if(!ready)	return
+	if(!active)	return
+	if(istype(M, /mob/living/carbon))
+		for(var/obj/item/implant/exile/E in M)//Checking that there is an exile implant in the contents
+			if(E.imp_in == M)//Checking that it's actually implanted vs just in their pocket
+				to_chat(M, "<font color='black'>The station gate has detected your exile implant and is blocking your entry.</font>")
+				return
+	M.forceMove(get_step(stationgate.loc, SOUTH))
+	M.setDir(SOUTH)
+	SEND_SOUND(M, sound('sound/effects/phasein.ogg'))
+	playsound(src, 'sound/effects/phasein.ogg', 100, 1)
+
+
+/obj/machinery/gateway/centeraway/attackby(obj/item/W as obj, mob/user as mob)
+	if(istype(W,/obj/item/multitool))
+		if(calibrated && stationgate)
+			to_chat(user, "<font color='black'>The gate is already calibrated, there is no work for you to do here.</font>")
+			return
+		else
+			stationgate = locate(/obj/machinery/gateway/centerstation)
+			if(!stationgate)
+				to_chat(user, "<span class='notice'>Error: Recalibration failed. No destination found... That can't be good.</span>")
+				return
+			else
+				to_chat(user, "<font color=#4F49AF><b>Recalibration successful!</b>:</font><font color='black'> This gate's systems have been fine tuned. Travel to this gate will now be on target.</font>")
+				calibrated = 1
+				return