/datum/map_template/shelter
	var/shelter_id
	var/description
	var/blacklisted_turfs
	var/whitelisted_turfs
	var/banned_areas

/datum/map_template/shelter/New()
	. = ..()
	blacklisted_turfs = typecacheof(/turf/closed)
	whitelisted_turfs = list()
	banned_areas = typecacheof(/area/shuttle)

/datum/map_template/shelter/proc/check_deploy(turf/deploy_location)
	var/affected = get_affected_turfs(deploy_location, centered=TRUE)
	for(var/turf/T in affected)
		var/area/A = get_area(T)
		if(is_type_in_typecache(A, banned_areas))
			return SHELTER_DEPLOY_BAD_AREA

		var/banned = is_type_in_typecache(T, blacklisted_turfs)
		var/permitted = is_type_in_typecache(T, whitelisted_turfs)
		if(banned && !permitted)
			return SHELTER_DEPLOY_BAD_TURFS

		for(var/obj/O in T)
			if(O.density && O.anchored)
				return SHELTER_DEPLOY_ANCHORED_OBJECTS
	return SHELTER_DEPLOY_ALLOWED

/datum/map_template/shelter/alpha
	name = "Shelter Alpha"
	shelter_id = "shelter_alpha"
	description = "A cosy self-contained pressurized shelter, with \
		built-in navigation, entertainment, medical facilities and a \
		sleeping area! Order now, and we'll throw in a TINY FAN, \
		absolutely free!"
	mappath = "_maps/templates/shelter_1.dmm"

/datum/map_template/shelter/alpha/New()
	. = ..()
	whitelisted_turfs = typecacheof(/turf/closed/mineral)