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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, PgTypeInfo, PgValueFormat, PgValueRef, Postgres};
use crate::types::Type;
use std::borrow::Cow;
use std::mem;
use time::{offset, 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 Type<Postgres> for [PrimitiveDateTime] {
fn type_info() -> PgTypeInfo {
PgTypeInfo::TIMESTAMP_ARRAY
}
}
impl Type<Postgres> for [OffsetDateTime] {
fn type_info() -> PgTypeInfo {
PgTypeInfo::TIMESTAMPTZ_ARRAY
}
}
impl Type<Postgres> for Vec<PrimitiveDateTime> {
fn type_info() -> PgTypeInfo {
<[PrimitiveDateTime] as Type<Postgres>>::type_info()
}
}
impl Type<Postgres> for Vec<OffsetDateTime> {
fn type_info() -> PgTypeInfo {
<[OffsetDateTime] as Type<Postgres>>::type_info()
}
}
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 let Some(plus) = s.rfind('+') {
let mut big = String::from(&s[..plus]);
while big.len() < 31 {
big.push('0');
}
big.push_str(&s[plus..]);
Cow::Owned(big)
} else if s.len() < 31 {
if s.contains('.') {
Cow::Owned(format!("{:0<30}", s))
} else {
Cow::Owned(format!("{}.000000000", s))
}
} else {
Cow::Borrowed(s)
};
PrimitiveDateTime::parse(&*s, "%Y-%m-%d %H:%M:%S.%N")?
}
})
}
}
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())
}
}