def require_args(*args):
    parser = reqparse.RequestParser()
    for arg in args:
        parser.add_argument(arg, required=True)
    return parser.parse_args()


class Challenge(object):
    """ A sample challenge -- inherit this and overwrite accordingly """

    points = 0
    provides = []
    requires = []
    description = "This description should be overriden"
    dependencies_provided_by = {}

    def __init__(self, wrapper):
        self.db = wrapper

    def game(self):
        if request.method == 'GET':
            return self.describe()
        if request.method == 'POST':
            return self.solve()

    def describe(self):
        return self.description

    def save_points(self, user):
        """ should be called when the challenge was solved successfully"""

        key = "points/{}".format(user, type(self).__name__)
        self.db.set_user_key(user, key, self.points)

    def solve(self):
        """ Needs to be implemented per challenge """
        pass