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use crate::google::protobuf::Timestamp;
#[derive(serde::Serialize, serde::Deserialize)]
#[serde(untagged)]
/// Date utility
#[derive(Clone, Debug)]
pub enum DateItem {
/// string
String(String),
/// ts
Timestamp { seconds: i64, nanos: i32 },
}
impl TryFrom<DateItem> for Timestamp {
type Error = time::Error;
fn try_from(value: DateItem) -> Result<Self, Self::Error> {
match value {
DateItem::String(ref string) => <Timestamp as std::str::FromStr>::from_str(string),
DateItem::Timestamp { seconds, nanos } => Ok(Self { seconds, nanos }),
}
}
}
impl From<time::OffsetDateTime> for Timestamp {
fn from(dt: time::OffsetDateTime) -> Self {
Timestamp {
seconds: dt.unix_timestamp(),
nanos: dt.nanosecond() as i32,
}
}
}
impl From<Timestamp> for String {
fn from(value: Timestamp) -> Self {
let odt = time::OffsetDateTime::try_from(value).expect("invalid date");
odt.format(&time::format_description::well_known::Rfc3339)
.expect("format is not rfc3339")
}
}
impl std::str::FromStr for Timestamp {
type Err = time::Error;
fn from_str(s: &str) -> Result<Self, Self::Err> {
let timestamp =
time::OffsetDateTime::parse(s, &time::format_description::well_known::Rfc3339)?;
Ok(Timestamp::from(timestamp))
}
}
impl TryFrom<String> for Timestamp {
type Error = time::Error;
fn try_from(value: String) -> Result<Self, Self::Error> {
<Timestamp as std::str::FromStr>::from_str(&value)
}
}
impl TryFrom<Timestamp> for time::OffsetDateTime {
type Error = time::Error;
fn try_from(value: Timestamp) -> Result<Self, Self::Error> {
let dt = time::OffsetDateTime::from_unix_timestamp(value.seconds)?;
Ok(dt.replace_nanosecond(value.nanos as u32)?)
}
}
#[cfg(test)]
mod tests {
use super::*;
use time::{Duration, OffsetDateTime};
#[test]
fn test_offsetdatetime_to_timestamp() {
let now = OffsetDateTime::now_utc();
let timestamp: Timestamp = now.into();
assert_eq!(timestamp.seconds, now.unix_timestamp());
assert_eq!(timestamp.nanos, now.nanosecond() as i32);
}
#[test]
fn test_timestamp_to_offsetdatetime() {
let now = OffsetDateTime::now_utc();
let timestamp: Timestamp = now.into();
let dt: OffsetDateTime = timestamp.try_into().unwrap();
assert_eq!(dt, now);
}
#[test]
fn test_timestamp_to_offsetdatetime_with_nanos() {
let now = OffsetDateTime::now_utc();
let nanos = 123456789;
let dt = now + Duration::nanoseconds(nanos);
let timestamp: Timestamp = dt.into();
let dt_from_timestamp: OffsetDateTime = timestamp.try_into().unwrap();
assert_eq!(dt_from_timestamp, dt);
}
#[test]
fn test_timestamp_to_offsetdatetime_with_negative_nanos() {
let now = OffsetDateTime::now_utc();
let nanos = -123456789;
let dt = now + Duration::nanoseconds(nanos);
let timestamp: Timestamp = dt.into();
let dt_from_timestamp: OffsetDateTime = timestamp.try_into().unwrap();
assert_eq!(dt_from_timestamp, dt);
}
#[test]
fn test_timestamp_to_offsetdatetime_invalid_seconds() {
let timestamp = Timestamp {
seconds: i64::MIN,
nanos: 0,
};
let result: Result<OffsetDateTime, time::Error> = timestamp.try_into();
assert!(result.is_err());
}
}
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