diff options
Diffstat (limited to 'src/timezone.rs')
| -rw-r--r-- | src/timezone.rs | 19 |
1 files changed, 16 insertions, 3 deletions
diff --git a/src/timezone.rs b/src/timezone.rs index 8401631..5284892 100644 --- a/src/timezone.rs +++ b/src/timezone.rs @@ -3,9 +3,14 @@ use core::convert::Infallible; /// A type that can be used to represent a TimeZone pub trait TimeZone { + /// The error to return in case of a failure to convert the local time to UTC type Err; - fn utc_offset(&self, date_time: NaiveDateTime) -> Result<UtcOffset, Self::Err>; + /// Given the time in the UTC timezone, determine the UtcOffset + fn utc_offset(&self, date_time: NaiveDateTime) -> UtcOffset; + + /// Given the local date and time, figure out the offset from UTC + fn offset_from_local_time(&self, date_time: NaiveDateTime) -> Result<UtcOffset, Self::Err>; } #[derive(Copy, Clone, Eq, PartialEq, Hash, Debug)] @@ -15,7 +20,11 @@ pub struct Utc; impl TimeZone for Utc { type Err = Infallible; - fn utc_offset(&self, _: NaiveDateTime) -> Result<UtcOffset, Self::Err> { + fn utc_offset(&self, _: NaiveDateTime) -> UtcOffset { + UtcOffset::UTC + } + + fn offset_from_local_time(&self, _: NaiveDateTime) -> Result<UtcOffset, Self::Err> { Ok(UtcOffset::UTC) } } @@ -74,7 +83,11 @@ impl UtcOffset { impl TimeZone for UtcOffset { type Err = Infallible; - fn utc_offset(&self, _: NaiveDateTime) -> Result<UtcOffset, Self::Err> { + fn utc_offset(&self, _: NaiveDateTime) -> UtcOffset { + *self + } + + fn offset_from_local_time(&self, _: NaiveDateTime) -> Result<UtcOffset, Self::Err> { Ok(*self) } } |