integrate a semi-working manager for save files (#3)

save_files.gd

@@ -0,0 +1,38 @@
+extends Node
+
+const names := [
+	"user://save_file_1.save",
+	"user://save_file_2.save",
+	"user://save_file_3.save",
+]
+
+var selected_file := names[0]
+
+func _ready() -> void:
+	for save_file_name in names:
+		ensure_existence(save_file_name)
+
+func ensure_existence(save_file_name: String) -> void:
+	if save_file_name in names and not FileAccess.file_exists(save_file_name):
+		print("Save file ", save_file_name, " not found, creating it")
+		empty(save_file_name)
+
+func empty(save_file_name: String) -> void:
+	print("Writing an empty object on ", save_file_name)
+	var save_file := FileAccess.open(save_file_name, FileAccess.WRITE)
+	save_file.store_line(JSON.stringify({}))
+	save_file.store_line("FOR YOUR SAFETY, ALWAYS CHECK IF THE DATA OF THE FILES YOU DOWNLOAD LOOKS OKAY")
+
+func read(save_file_name: String) -> Variant:
+	ensure_existence(save_file_name)
+	selected_file = save_file_name
+	
+	var save_file := FileAccess.open(save_file_name, FileAccess.READ)
+	var json := JSON.new()
+	var json_string := save_file.get_line()
+	
+	if json.parse(json_string) != OK:
+		print("(SAVES) JSON Parse Error: ", json.get_error_message(), " in ", json_string, " at line ", json.get_error_line())
+		return {}
+	
+	return json.data