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package wasi:clocks@0.2.1;
@unstable(feature = clocks-timezone)
interface timezone {
@unstable(feature = clocks-timezone)
use wall-clock.{datetime};
/// Return information needed to display the given `datetime`. This includes
/// the UTC offset, the time zone name, and a flag indicating whether
/// daylight saving time is active.
///
/// If the timezone cannot be determined for the given `datetime`, return a
/// `timezone-display` for `UTC` with a `utc-offset` of 0 and no daylight
/// saving time.
@unstable(feature = clocks-timezone)
display: func(when: datetime) -> timezone-display;
/// The same as `display`, but only return the UTC offset.
@unstable(feature = clocks-timezone)
utc-offset: func(when: datetime) -> s32;
/// Information useful for displaying the timezone of a specific `datetime`.
///
/// This information may vary within a single `timezone` to reflect daylight
/// saving time adjustments.
@unstable(feature = clocks-timezone)
record timezone-display {
/// The number of seconds difference between UTC time and the local
/// time of the timezone.
///
/// The returned value will always be less than 86400 which is the
/// number of seconds in a day (24*60*60).
///
/// In implementations that do not expose an actual time zone, this
/// should return 0.
utc-offset: s32,
/// The abbreviated name of the timezone to display to a user. The name
/// `UTC` indicates Coordinated Universal Time. Otherwise, this should
/// reference local standards for the name of the time zone.
///
/// In implementations that do not expose an actual time zone, this
/// should be the string `UTC`.
///
/// In time zones that do not have an applicable name, a formatted
/// representation of the UTC offset may be returned, such as `-04:00`.
name: string,
/// Whether daylight saving time is active.
///
/// In implementations that do not expose an actual time zone, this
/// should return false.
in-daylight-saving-time: bool,
}
}
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