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//! Treat an [`OffsetDateTime`] as a [Unix timestamp] with milliseconds for
//! the purposes of serde.
//!
//! Use this module in combination with serde's [`#[with]`][with] attribute.
//!
//! When deserializing, the offset is assumed to be UTC.
//!
use serde::{de, Deserialize, Deserializer, Serialize, Serializer};
use crate::OffsetDateTime;
/// Serialize an `OffsetDateTime` as its Unix timestamp with milliseconds
pub fn serialize<S: Serializer>(
datetime: &OffsetDateTime,
serializer: S,
) -> Result<S::Ok, S::Error> {
let timestamp = datetime.unix_timestamp_nanos() / 1_000_000;
timestamp.serialize(serializer)
}
/// Deserialize an `OffsetDateTime` from its Unix timestamp with milliseconds
pub fn deserialize<'a, D: Deserializer<'a>>(deserializer: D) -> Result<OffsetDateTime, D::Error> {
let value: i128 = <_>::deserialize(deserializer)?;
OffsetDateTime::from_unix_timestamp_nanos(value * 1_000_000)
.map_err(|err| de::Error::invalid_value(de::Unexpected::Signed(err.value), &err))
}
/// Treat an `Option<OffsetDateTime>` as a [Unix timestamp] with milliseconds
/// for the purposes of serde.
///
/// Use this module in combination with serde's [`#[with]`][with] attribute.
///
/// When deserializing, the offset is assumed to be UTC.
///
pub mod option {
#[allow(clippy::wildcard_imports)]
use super::*;
/// Serialize an `Option<OffsetDateTime>` as its Unix timestamp with milliseconds
pub fn serialize<S: Serializer>(
option: &Option<OffsetDateTime>,
serializer: S,
) -> Result<S::Ok, S::Error> {
option
.map(|timestamp| timestamp.unix_timestamp_nanos() / 1_000_000)
.serialize(serializer)
}
/// Deserialize an `Option<OffsetDateTime>` from its Unix timestamp with milliseconds
pub fn deserialize<'a, D: Deserializer<'a>>(
deserializer: D,
) -> Result<Option<OffsetDateTime>, D::Error> {
Option::deserialize(deserializer)?
.map(|value: i128| OffsetDateTime::from_unix_timestamp_nanos(value * 1_000_000))
.transpose()
.map_err(|err| de::Error::invalid_value(de::Unexpected::Signed(err.value), &err))
}
}