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- from __future__ import annotations
- from typing import TYPE_CHECKING
- from isoduration.formatter.exceptions import DurationFormattingException
- if TYPE_CHECKING: # pragma: no cover
- from isoduration.types import DateDuration, Duration
- def check_global_sign(duration: Duration) -> int:
- is_date_zero = (
- duration.date.years == 0
- and duration.date.months == 0
- and duration.date.days == 0
- and duration.date.weeks == 0
- )
- is_time_zero = (
- duration.time.hours == 0
- and duration.time.minutes == 0
- and duration.time.seconds == 0
- )
- is_date_negative = (
- duration.date.years <= 0
- and duration.date.months <= 0
- and duration.date.days <= 0
- and duration.date.weeks <= 0
- )
- is_time_negative = (
- duration.time.hours <= 0
- and duration.time.minutes <= 0
- and duration.time.seconds <= 0
- )
- if not is_date_zero and not is_time_zero:
- if is_date_negative and is_time_negative:
- return -1
- elif not is_date_zero:
- if is_date_negative:
- return -1
- elif not is_time_zero:
- if is_time_negative:
- return -1
- return +1
- def validate_date_duration(date_duration: DateDuration) -> None:
- if date_duration.weeks:
- if date_duration.years or date_duration.months or date_duration.days:
- raise DurationFormattingException(
- "Weeks are incompatible with other date designators"
- )
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