python/tsfile/date_utils.py

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# to you under the Apache License, Version 2.0 (the
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#
#     http://www.apache.org/licenses/LICENSE-2.0
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from datetime import date


class DateTimeParseException(Exception):
    pass


def parse_int_to_date(date_int: int) -> date:
    try:
        year = date_int // 10000
        month = (date_int // 100) % 100
        day = date_int % 100
        return date(year, month, day)
    except ValueError as e:
        raise DateTimeParseException("Invalid date format.") from e


def parse_date_to_int(local_date: date) -> int:
    if local_date is None:
        raise DateTimeParseException("Date expression is none or empty.")
    if local_date.year < 1000 or local_date.year > 9999:
        raise DateTimeParseException("Year must be between 1000 and 9999.")
    return local_date.year * 10000 + local_date.month * 100 + local_date.day