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use std::ops::{Deref, DerefMut};
use std::str::FromStr;
use bson::Bson;
use bson::spec::BinarySubtype;
use chrono::Utc;
use serde::{Deserializer, Serializer};
use serde::de::Error;
use crate::types::BINARY_SUBTYPE_TIME_UTC;
#[derive(Clone, Copy, Eq, Hash, Ord, PartialEq, PartialOrd)]
pub struct TimeUtc {
pub inner: chrono::NaiveTime,
}
impl From<chrono::NaiveTime> for TimeUtc {
fn from(arg: chrono::NaiveTime) -> Self {
Self {
inner: arg
}
}
}
impl From<&chrono::NaiveTime> for TimeUtc {
fn from(arg: &chrono::NaiveTime) -> Self {
Self {
inner: arg.clone()
}
}
}
impl serde::Serialize for TimeUtc {
fn serialize<S>(&self, serializer: S) -> Result<S::Ok, S::Error> where S: Serializer {
let utc = self.inner.to_string();
return bson::Binary {
subtype: BinarySubtype::UserDefined(BINARY_SUBTYPE_TIME_UTC),
bytes: utc.into_bytes(),
}.serialize(serializer);
}
}
impl<'de> serde::Deserialize<'de> for TimeUtc {
fn deserialize<D>(deserializer: D) -> Result<Self, D::Error> where D: Deserializer<'de> {
match Bson::deserialize(deserializer)? {
Bson::String(s) => {
return Ok(Self {
inner: chrono::NaiveTime::from_str(&s).or_else(|e| Err(D::Error::custom(e.to_string())))?,
});
}
Bson::Binary(data) => {
let s = String::from_utf8(data.bytes).unwrap_or_default();
return Ok(Self {
inner: chrono::NaiveTime::from_str(&s).or_else(|e| Err(D::Error::custom(e.to_string())))?,
});
}
_ => {
Err(D::Error::custom("deserialize un supported bson type!"))
}
}
}
}
impl std::fmt::Display for TimeUtc {
fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
self.inner.fmt(f)
}
}
impl std::fmt::Debug for TimeUtc {
fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
self.inner.fmt(f)
}
}
impl Deref for TimeUtc {
type Target = chrono::NaiveTime;
fn deref(&self) -> &Self::Target {
&self.inner
}
}
impl DerefMut for TimeUtc {
fn deref_mut(&mut self) -> &mut Self::Target {
&mut self.inner
}
}
impl TimeUtc {
pub fn now() -> TimeUtc {
let utc = Utc::now();
let dt = bson::DateTime::from_millis(utc.timestamp_millis());
Self {
inner: dt.to_chrono().with_timezone(&Utc).time()
}
}
pub fn from_str(arg: &str) -> Result<Self, crate::error::Error> {
let inner = chrono::NaiveTime::from_str(arg)?;
Ok(Self {
inner: inner
})
}
}
#[cfg(test)]
mod test {
use crate::types::TimeUtc;
#[test]
fn test_ser_de() {
let b = TimeUtc::now();
let bsons = bson::to_bson(&b).unwrap();
let b_de: TimeUtc = bson::from_bson(bsons).unwrap();
assert_eq!(b, b_de);
}
}