from datetime import datetime


class Logger:
    _instance = None

    def __new__(cls, *args, **kwargs):
        if cls._instance is None:
            cls._instance = super(Logger, cls).__new__(cls, *args, **kwargs)
        return cls._instance

    def __init__(self):
        if not hasattr(self, "initialized"):
            self.initialized = True
            self.__file = open("log.txt", "a")
            print("Singleton-Instanz wurde erstellt.")

    @staticmethod
    def getInstance():
        if Logger._instance is None:
            Logger._instance = Logger()
        return Logger._instance

    def log(self, logstring):
        self.__file.write(f"{str(datetime.today())}: {logstring}\n")