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use crate::decode::Decode;
use crate::encode::{Encode, IsNull};
use crate::error::BoxDynError;
use crate::postgres::types::time::PG_EPOCH;
use crate::postgres::{
PgArgumentBuffer, PgHasArrayType, PgTypeInfo, PgValueFormat, PgValueRef, Postgres,
};
use crate::types::Type;
use std::borrow::Cow;
use std::mem;
use time::macros::format_description;
use time::macros::offset;
use time::{Duration, OffsetDateTime, PrimitiveDateTime};
impl Type<Postgres> for PrimitiveDateTime {
fn type_info() -> PgTypeInfo {
PgTypeInfo::TIMESTAMP
}
}
impl Type<Postgres> for OffsetDateTime {
fn type_info() -> PgTypeInfo {
PgTypeInfo::TIMESTAMPTZ
}
}
impl PgHasArrayType for PrimitiveDateTime {
fn array_type_info() -> PgTypeInfo {
PgTypeInfo::TIMESTAMP_ARRAY
}
}
impl PgHasArrayType for OffsetDateTime {
fn array_type_info() -> PgTypeInfo {
PgTypeInfo::TIMESTAMPTZ_ARRAY
}
}
impl Encode<'_, Postgres> for PrimitiveDateTime {
fn encode_by_ref(&self, buf: &mut PgArgumentBuffer) -> IsNull {
let us = (*self - PG_EPOCH.midnight()).whole_microseconds() as i64;
Encode::<Postgres>::encode(&us, buf)
}
fn size_hint(&self) -> usize {
mem::size_of::<i64>()
}
}
impl<'r> Decode<'r, Postgres> for PrimitiveDateTime {
fn decode(value: PgValueRef<'r>) -> Result<Self, BoxDynError> {
Ok(match value.format() {
PgValueFormat::Binary => {
let us = Decode::<Postgres>::decode(value)?;
PG_EPOCH.midnight() + Duration::microseconds(us)
}
PgValueFormat::Text => {
let s = value.as_str()?;
let s = if s.contains('.') {
Cow::Borrowed(s)
} else {
Cow::Owned(format!("{}.0", s))
};
if s.contains('+') {
PrimitiveDateTime::parse(&*s, &format_description!("[year]-[month]-[day] [hour]:[minute]:[second].[subsecond][offset_hour]"))?
} else {
PrimitiveDateTime::parse(
&*s,
&format_description!(
"[year]-[month]-[day] [hour]:[minute]:[second].[subsecond]"
),
)?
}
}
})
}
}
impl Encode<'_, Postgres> for OffsetDateTime {
fn encode_by_ref(&self, buf: &mut PgArgumentBuffer) -> IsNull {
let utc = self.to_offset(offset!(UTC));
let primitive = PrimitiveDateTime::new(utc.date(), utc.time());
Encode::<Postgres>::encode(&primitive, buf)
}
fn size_hint(&self) -> usize {
mem::size_of::<i64>()
}
}
impl<'r> Decode<'r, Postgres> for OffsetDateTime {
fn decode(value: PgValueRef<'r>) -> Result<Self, BoxDynError> {
Ok(<PrimitiveDateTime as Decode<Postgres>>::decode(value)?.assume_utc())
}
}