time/serde/timestamp/
milliseconds_i64.rs

1//! Treat an [`OffsetDateTime`] as a [Unix timestamp] with milliseconds 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 num_conv::prelude::*;
12use serde_core::{de, Deserialize, Deserializer, Serialize, Serializer};
13
14use crate::OffsetDateTime;
15
16/// Serialize an `OffsetDateTime` as its Unix timestamp with milliseconds
17#[inline]
18pub fn serialize<S: Serializer>(
19    datetime: &OffsetDateTime,
20    serializer: S,
21) -> Result<S::Ok, S::Error> {
22    let timestamp = (datetime.unix_timestamp_nanos() / 1_000_000).truncate::<i64>();
23    timestamp.serialize(serializer)
24}
25
26/// Deserialize an `OffsetDateTime` from its Unix timestamp with milliseconds
27#[inline]
28pub fn deserialize<'a, D: Deserializer<'a>>(deserializer: D) -> Result<OffsetDateTime, D::Error> {
29    let value: i64 = <_>::deserialize(deserializer)?;
30    OffsetDateTime::from_unix_timestamp_nanos(value.extend::<i128>() * 1_000_000)
31        .map_err(|err| de::Error::invalid_value(de::Unexpected::Signed(err.value), &err))
32}
33
34/// Treat an `Option<OffsetDateTime>` as a [Unix timestamp] with milliseconds
35/// for the purposes of serde.
36///
37/// Use this module in combination with serde's [`#[with]`][with] attribute.
38///
39/// When deserializing, the offset is assumed to be UTC.
40///
41/// [Unix timestamp]: https://en.wikipedia.org/wiki/Unix_time
42/// [with]: https://serde.rs/field-attrs.html#with
43pub mod option {
44    use super::*;
45
46    /// Serialize an `Option<OffsetDateTime>` as its Unix timestamp with milliseconds
47    #[inline]
48    pub fn serialize<S: Serializer>(
49        option: &Option<OffsetDateTime>,
50        serializer: S,
51    ) -> Result<S::Ok, S::Error> {
52        option
53            .map(|timestamp| (timestamp.unix_timestamp_nanos() / 1_000_000).truncate::<i64>())
54            .serialize(serializer)
55    }
56
57    /// Deserialize an `Option<OffsetDateTime>` from its Unix timestamp with milliseconds
58    #[inline]
59    pub fn deserialize<'a, D: Deserializer<'a>>(
60        deserializer: D,
61    ) -> Result<Option<OffsetDateTime>, D::Error> {
62        Option::deserialize(deserializer)?
63            .map(|value: i64| {
64                OffsetDateTime::from_unix_timestamp_nanos(value.extend::<i128>() * 1_000_000)
65            })
66            .transpose()
67            .map_err(|err| de::Error::invalid_value(de::Unexpected::Signed(err.value), &err))
68    }
69}
time/serde/timestamp/milliseconds_i64.rs

time/serde/timestamp/
milliseconds_i64.rs
