use crate::decode::Decode;
use crate::encode::{Encode, IsNull};
use crate::error::BoxDynError;
use crate::types::Type;
use crate::{PgArgumentBuffer, PgHasArrayType, PgTypeInfo, PgValueFormat, PgValueRef, Postgres};
use chrono::{Duration, NaiveDate};
use std::mem;
impl Type<Postgres> for NaiveDate {
fn type_info() -> PgTypeInfo {
PgTypeInfo::DATE
}
}
impl PgHasArrayType for NaiveDate {
fn array_type_info() -> PgTypeInfo {
PgTypeInfo::DATE_ARRAY
}
}
impl Encode<'_, Postgres> for NaiveDate {
fn encode_by_ref(&self, buf: &mut PgArgumentBuffer) -> IsNull {
let days = (*self - postgres_epoch_date()).num_days() as i32;
Encode::<Postgres>::encode(&days, buf)
}
fn size_hint(&self) -> usize {
mem::size_of::<i32>()
}
}
impl<'r> Decode<'r, Postgres> for NaiveDate {
fn decode(value: PgValueRef<'r>) -> Result<Self, BoxDynError> {
Ok(match value.format() {
PgValueFormat::Binary => {
let days: i32 = Decode::<Postgres>::decode(value)?;
postgres_epoch_date() + Duration::days(days.into())
}
PgValueFormat::Text => NaiveDate::parse_from_str(value.as_str()?, "%Y-%m-%d")?,
})
}
}
#[inline]
fn postgres_epoch_date() -> NaiveDate {
NaiveDate::from_ymd_opt(2000, 1, 1).expect("expected 2000-01-01 to be a valid NaiveDate")
}