import time


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


_MIGRATIONS = {1: _v1_to_v2}


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