# def _v1_to_v2(data):
#     data["cat"]["fullness"] = 100
#     data["cat"]["happiness"] = 100
#     data["cat"]["last_updated"] = time.time()
#     data["version"] = 2
#     return data


_MIGRATIONS = {}


def migrate(data):
    while data["version"] in _MIGRATIONS:
        data = _MIGRATIONS[data["version"]](data)
    return data