Move Xenoarcheology globals and initialization into a subsystem

* Move the global spawning_turfs lists from master_controller into SSxenoarch.  Rename all references.
* Move the call to SetupXenoarch from master_controller.setup() to SSxenoarch.Initialize()  Put SSxenoarch init order near the end to match current behavior.

code/__defines/subsystems.dm

@@ -29,3 +29,4 @@ var/global/list/runlevel_flags = list(RUNLEVEL_LOBBY, RUNLEVEL_SETUP, RUNLEVEL_G
 #define INIT_ORDER_SHUTTLES 3
 #define INIT_ORDER_LIGHTING 0
 #define INIT_ORDER_AIR -1
+#define INIT_ORDER_XENOARCH	-20

code/controllers/master_controller.dm

@@ -37,7 +37,7 @@ datum/controller/game_controller/proc/setup()
 
 	setup_objects()
 	// setupgenetics() Moved to SSatoms
-	SetupXenoarch()
+	// SetupXenoarch() - Moved to SSxenoarch
 
 	transfer_controller = new
 	admin_notice("<span class='danger'>Initializations complete.</span>", R_DEBUG)

code/controllers/subsystems/xenoarch.dm

@@ -1,14 +1,35 @@
-/datum/controller/game_controller
-	var/list/artifact_spawning_turfs = list()
-	var/list/digsite_spawning_turfs = list()
-
 #define XENOARCH_SPAWN_CHANCE 0.5
 #define DIGSITESIZE_LOWER 4
 #define DIGSITESIZE_UPPER 12
 #define ARTIFACTSPAWNNUM_LOWER 6
 #define ARTIFACTSPAWNNUM_UPPER 12
 
-/datum/controller/game_controller/proc/SetupXenoarch()
+//
+// Xenoarch subsystem handles initialization of Xenoarcheaology artifacts and digsites.
+//
+SUBSYSTEM_DEF(xenoarch)
+	name = "Xenoarch"
+	init_order = INIT_ORDER_XENOARCH
+	flags = SS_NO_FIRE
+	var/list/artifact_spawning_turfs = list()
+	var/list/digsite_spawning_turfs = list()
+
+/datum/controller/subsystem/xenoarch/Initialize(timeofday)
+	SetupXenoarch()
+	..()
+
+/datum/controller/subsystem/xenoarch/Recover()
+	if (istype(SSxenoarch.artifact_spawning_turfs))
+		artifact_spawning_turfs = SSxenoarch.artifact_spawning_turfs
+	if (istype(SSxenoarch.digsite_spawning_turfs))
+		digsite_spawning_turfs = SSxenoarch.digsite_spawning_turfs
+
+/datum/controller/subsystem/xenoarch/stat_entry(msg)
+	if (!Debug2)
+		return // Only show up in stat panel if debugging is enabled.
+	. = ..()
+
+/datum/controller/subsystem/xenoarch/proc/SetupXenoarch()
 	for(var/turf/simulated/mineral/M in world)
 		if(!M.density)
 			continue

code/modules/xenoarcheaology/sampling.dm

@@ -70,15 +70,15 @@
 		artifact_distance = rand()
 		artifact_id = container.artifact_find.artifact_id
 	else
-		if(master_controller) //Sanity check due to runtimes ~Z
+		if(SSxenoarch) //Sanity check due to runtimes ~Z
-			for(var/turf/simulated/mineral/T in master_controller.artifact_spawning_turfs)
+			for(var/turf/simulated/mineral/T in SSxenoarch.artifact_spawning_turfs)
 				if(T.artifact_find)
 					var/cur_dist = get_dist(container, T) * 2
 					if( (artifact_distance < 0 || cur_dist < artifact_distance))
 						artifact_distance = cur_dist + rand() * 2 - 1
 						artifact_id = T.artifact_find.artifact_id
 				else
-					master_controller.artifact_spawning_turfs.Remove(T)
+					SSxenoarch.artifact_spawning_turfs.Remove(T)
 
 /obj/item/device/core_sampler
 	name = "core sampler"

code/modules/xenoarcheaology/tools/tools.dm

@@ -57,8 +57,8 @@
 		var/nearestSimpleTargetDist = -1
 		var/turf/cur_turf = get_turf(src)
 
-		if(master_controller) //Sanity check due to runtimes ~Z
+		if(SSxenoarch) //Sanity check due to runtimes ~Z
-			for(var/A in master_controller.artifact_spawning_turfs)
+			for(var/A in SSxenoarch.artifact_spawning_turfs)
 				var/turf/simulated/mineral/T = A
 				if(T.density && T.artifact_find)
 					if(T.z == cur_turf.z)
@@ -67,9 +67,9 @@
 							nearestTargetDist = cur_dist + rand() * 2 - 1
 							nearestTargetId = T.artifact_find.artifact_id
 				else
-					master_controller.artifact_spawning_turfs.Remove(T)
+					SSxenoarch.artifact_spawning_turfs.Remove(T)
 
-			for(var/A in master_controller.digsite_spawning_turfs)
+			for(var/A in SSxenoarch.digsite_spawning_turfs)
 				var/turf/simulated/mineral/T = A
 				if(T.density && T.finds && T.finds.len)
 					if(T.z == cur_turf.z)
@@ -77,7 +77,7 @@
 						if(nearestSimpleTargetDist < 0 || cur_dist < nearestSimpleTargetDist)
 							nearestSimpleTargetDist = cur_dist + rand() * 2 - 1
 				else
-					master_controller.digsite_spawning_turfs.Remove(T)
+					SSxenoarch.digsite_spawning_turfs.Remove(T)
 
 		if(nearestTargetDist >= 0)
 			user << "Exotic energy detected on wavelength '[nearestTargetId]' in a radius of [nearestTargetDist]m[nearestSimpleTargetDist > 0 ? "; small anomaly detected in a radius of [nearestSimpleTargetDist]m" : ""]"

polaris.dme

@@ -180,6 +180,7 @@
 #include "code\controllers\subsystems\machines.dm"
 #include "code\controllers\subsystems\orbits.dm"
 #include "code\controllers\subsystems\shuttles.dm"
+#include "code\controllers\subsystems\xenoarch.dm"
 #include "code\datums\ai_law_sets.dm"
 #include "code\datums\ai_laws.dm"
 #include "code\datums\beam.dm"
@@ -2316,7 +2317,6 @@
 #include "code\modules\xenoarcheaology\boulder.dm"
 #include "code\modules\xenoarcheaology\effect.dm"
 #include "code\modules\xenoarcheaology\manuals.dm"
-#include "code\modules\xenoarcheaology\master_controller.dm"
 #include "code\modules\xenoarcheaology\misc.dm"
 #include "code\modules\xenoarcheaology\sampling.dm"
 #include "code\modules\xenoarcheaology\artifacts\artifact.dm"