from datetime import datetime

class AccessToken():
    """ Model for an AccessToken

        Attributes:
            timestamp: Is a Datetime from current Time.
            user:   Is an User.
            token:  String to verify access later.
    """

    timestamp = None
    user = None
    token = None

    def __init__(self, user, token, timestamp=datetime.now()):
        """ Initialize Class AccessToken

            No more to say.

            Args:
                User: Is an User to set.
                token: Is a String to verify later
                timestamp: Default current time, but can set to an other datetime-Object.
        """

        self.user = user
        self.timestamp = timestamp
        self.token = token

    def updateTimestamp(self):
        """ Update the Timestamp

            Update the Timestamp to the current Time.
        """
        self.timestamp = datetime.now()

    def __eq__(self, token):
        return True if self.token == token else False

    def __sub__(self, other):
        return other - self.timestamp

    def __str__(self):
        return "AccessToken({}, {}, {}".format(self.user, self.token, self.timestamp)

    def __repr__(self):
        return "AccessToken({}, {}, {}".format(self.user, self.token, self.timestamp)