def get_airport(id, context):
    if os.environ["DATABASE"] == "janus":
        data = janus_service.get_airport_from_janus(id, context)
    else:
        raise database_not_found.DatabaseNotFoundException(
            os.environ["DATABASE"])

    return data
def get_airports(city, country, code, context):
    if os.environ["DATABASE"] == "janus":
        data = janus_service.get_airports_from_janus(capitalize(city),
                                                     capitalize(country),
                                                     upper(code), context)
    else:
        raise database_not_found.DatabaseNotFoundException(
            os.environ["DATABASE"])

    return data
def get_filter_list(filter):
    if filter not in filter_types:
        raise tag_not_found.TagNotFounException(filter)
    if filter == "type":
        return ["non-stop", "one-stop", "two-stop"]
    if os.environ["DATABASE"] == "janus":
        return janus_service.get_flight_info_from_janus(filter)
    else:
        raise database_not_found.DatabaseNotFoundException(
            os.environ["DATABASE"])
def get_onestop_flights(from_, to, filters, context):
    if filters["date_to"] - filters["date_from"] < timedelta(0):
        raise illegal_date.IllegalDateException(
            "from date can not be greater than to date")

    if os.environ["DATABASE"] == "janus":
        flights = janus_service.get_onestop_flights_from_janus(
            from_, to, context)
    else:
        raise database_not_found.DatabaseNotFoundException(
            os.environ["DATABASE"])

    return update_cost(flights, filters["date_from"], 0.75)