1bit-godot-course/metroidvania/SaverLoader.gd

extends Node

const save_path = "user://savegame.save"

var is_loading = false
var custom_data = { # Defaults
	"boss_defeated": false,
	"missiles": 0,
	"missiles_unlocked": false,
	"health": 4,
}

func save_game():
	var save_game = File.new()
	save_game.open(save_path, File.WRITE)
	var persistingNodes = get_tree().get_nodes_in_group("Persists")
	
	save_game.store_line(to_json(custom_data))
	
	for node in persistingNodes:
		var nodeData = node.save()
		save_game.store_line(to_json(nodeData))
	save_game.close()
	
func load_game():
	var save_game = File.new()

	if not save_game.file_exists(save_path):
		return
	
	var persistingNodes = get_tree().get_nodes_in_group("Persists")
	for node in persistingNodes:
		node.queue_free()
		
	save_game.open(save_path, File.READ)
	
	if not save_game.eof_reached():
		custom_data = parse_json(save_game.get_line())
	
	while not save_game.eof_reached():
		var current_line = save_game.get_line()
		if current_line == "":
			continue
		current_line = parse_json(current_line)
		if current_line != null:
			var newNode = load(current_line["filename"]).instance()
			get_node(current_line["parent"]).add_child(newNode, true)
			newNode.position = Vector2(current_line["position_x"], current_line["position_y"])
			for property in current_line.keys():
				if property != "filename" and property != "parent" and property != "position_x" and property != "position_y":
					newNode.set(property, current_line[property])

	save_game.close()