time/serde/timestamp/
nanoseconds.rs

1//! Treat an [`OffsetDateTime`] as a [Unix timestamp] with nanoseconds for
2//! the purposes of serde.
3//!
4//! Use this module in combination with serde's [`#[with]`][with] attribute.
5//!
6//! When deserializing, the offset is assumed to be UTC.
7//!
8//! [Unix timestamp]: https://en.wikipedia.org/wiki/Unix_time
9//! [with]: https://serde.rs/field-attrs.html#with
10
11use serde::{de, Deserialize, Deserializer, Serialize, Serializer};
12
13use crate::OffsetDateTime;
14
15/// Serialize an `OffsetDateTime` as its Unix timestamp with nanoseconds
16pub fn serialize<S: Serializer>(
17    datetime: &OffsetDateTime,
18    serializer: S,
19) -> Result<S::Ok, S::Error> {
20    datetime.unix_timestamp_nanos().serialize(serializer)
21}
22
23/// Deserialize an `OffsetDateTime` from its Unix timestamp with nanoseconds
24pub fn deserialize<'a, D: Deserializer<'a>>(deserializer: D) -> Result<OffsetDateTime, D::Error> {
25    OffsetDateTime::from_unix_timestamp_nanos(<_>::deserialize(deserializer)?)
26        .map_err(|err| de::Error::invalid_value(de::Unexpected::Signed(err.value), &err))
27}
28
29/// Treat an `Option<OffsetDateTime>` as a [Unix timestamp] with nanoseconds
30/// for the purposes of serde.
31///
32/// Use this module in combination with serde's [`#[with]`][with] attribute.
33///
34/// When deserializing, the offset is assumed to be UTC.
35///
36/// [Unix timestamp]: https://en.wikipedia.org/wiki/Unix_time
37/// [with]: https://serde.rs/field-attrs.html#with
38pub mod option {
39    #[allow(clippy::wildcard_imports)]
40    use super::*;
41
42    /// Serialize an `Option<OffsetDateTime>` as its Unix timestamp with nanoseconds
43    pub fn serialize<S: Serializer>(
44        option: &Option<OffsetDateTime>,
45        serializer: S,
46    ) -> Result<S::Ok, S::Error> {
47        option
48            .map(OffsetDateTime::unix_timestamp_nanos)
49            .serialize(serializer)
50    }
51
52    /// Deserialize an `Option<OffsetDateTime>` from its Unix timestamp with nanoseconds
53    pub fn deserialize<'a, D: Deserializer<'a>>(
54        deserializer: D,
55    ) -> Result<Option<OffsetDateTime>, D::Error> {
56        Option::deserialize(deserializer)?
57            .map(OffsetDateTime::from_unix_timestamp_nanos)
58            .transpose()
59            .map_err(|err| de::Error::invalid_value(de::Unexpected::Signed(err.value), &err))
60    }
61}
time/serde/timestamp/nanoseconds.rs

time/serde/timestamp/
nanoseconds.rs
