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code/modules/procedural_mapping/mapGeneratorModules/helpers.dm

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+//Helper Modules
+
+
+// Helper to repressurize the area in case it was run in space
+/datum/mapGeneratorModule/bottomLayer/repressurize
+	spawnableAtoms = list()
+	spawnableTurfs = list()
+
+/datum/mapGeneratorModule/bottomLayer/repressurize/generate()
+	if(!mother)
+		return
+	var/list/map = mother.map
+	for(var/turf/T in map)
+		SSair.remove_from_active(T)
+	for(var/turf/open/T in map)
+		if(T.air)
+			if(T.initial_gas_mix)
+				T.air.parse_gas_string(T.initial_gas_mix)
+				T.temperature = T.air.temperature
+			else
+				T.air.copy_from_turf(T)
+		SSair.add_to_active(T)
+
+/datum/mapGeneratorModule/bottomLayer/massdelete
+	spawnableAtoms = list()
+	spawnableTurfs = list()
+	var/deleteturfs = TRUE	//separate var for the empty type.
+	var/list/ignore_typecache
+
+/datum/mapGeneratorModule/bottomLayer/massdelete/generate()
+	if(!mother)
+		return
+	for(var/V in mother.map)
+		var/turf/T = V
+		T.empty(deleteturfs? null : T.type, null, ignore_typecache, CHANGETURF_FORCEOP)
+
+/datum/mapGeneratorModule/bottomLayer/massdelete/no_delete_mobs/New()
+	..()
+	ignore_typecache = GLOB.typecache_mob
+
+/datum/mapGeneratorModule/bottomLayer/massdelete/leave_turfs
+	deleteturfs = FALSE
+
+/datum/mapGeneratorModule/bottomLayer/massdelete/regeneration_delete
+	deleteturfs = FALSE
+
+/datum/mapGeneratorModule/bottomLayer/massdelete/regeneration_delete/New()
+	..()
+	ignore_typecache = GLOB.typecache_mob
+
+//Only places atoms/turfs on area borders
+/datum/mapGeneratorModule/border
+	clusterCheckFlags = CLUSTER_CHECK_NONE
+
+/datum/mapGeneratorModule/border/generate()
+	if(!mother)
+		return
+	var/list/map = mother.map
+	for(var/turf/T in map)
+		if(is_border(T))
+			place(T)
+
+/datum/mapGeneratorModule/border/proc/is_border(turf/T)
+	for(var/direction in list(SOUTH,EAST,WEST,NORTH))
+		if (get_step(T,direction) in mother.map)
+			continue
+		return 1
+	return 0
+
+/datum/mapGenerator/repressurize
+	modules = list(/datum/mapGeneratorModule/bottomLayer/repressurize)
+	buildmode_name = "Block: Restore Roundstart Air Contents"
+
+/datum/mapGenerator/massdelete
+	modules = list(/datum/mapGeneratorModule/bottomLayer/massdelete)
+	buildmode_name = "Block: Full Mass Deletion"
+
+/datum/mapGenerator/massdelete/nomob
+	modules = list(/datum/mapGeneratorModule/bottomLayer/massdelete/no_delete_mobs)
+	buildmode_name = "Block: Mass Deletion - Leave Mobs"
+
+/datum/mapGenerator/massdelete/noturf
+	modules = list(/datum/mapGeneratorModule/bottomLayer/massdelete/leave_turfs)
+	buildmode_name = "Block: Mass Deletion - Leave Turfs"
+
+/datum/mapGenerator/massdelete/regen
+	modules = list(/datum/mapGeneratorModule/bottomLayer/massdelete/regeneration_delete)
+	buildmode_name = "Block: Mass Deletion - Leave Mobs and Turfs"