tilemap_saver.gd

class_name TilemapSaver

## Converts Node2D and it's TileMapLayer children to a PackedScene
static func pack_tilemaps(parent_node: Node2D) -> PackedScene:
	for child in parent_node.get_children():
		if child is TileMapLayer:
			child.owner = parent_node
	var packed := PackedScene.new()
	var result = packed.pack(parent_node)
	if result == OK:
		return packed
	# failed
	return null


static func save_tilemaps(parent_node: Node2D, file_path: String) -> Error:
	var scene: PackedScene = pack_tilemaps(parent_node)
	DirAccess.make_dir_absolute(file_path.get_base_dir())
	return ResourceSaver.save(scene, path)

# Usage:
# save_tilemaps(parent_node, "user://{save_index}/maps/{map_id}.tscn")
# Reloading:
# var scene = load("user://{save_index}/maps/{map_id}.tscn")
# var node = scene.instantiate()
# map.add_node(node)