|
| 1 | +use bytes::BytesMut; |
| 2 | +use jiff_01::{ |
| 3 | + civil::{Date, DateTime, Time}, |
| 4 | + Span, SpanRound, Timestamp, Unit, |
| 5 | +}; |
| 6 | +use postgres_protocol::types; |
| 7 | +use std::error::Error; |
| 8 | + |
| 9 | +use crate::{FromSql, IsNull, ToSql, Type}; |
| 10 | + |
| 11 | +const fn base() -> DateTime { |
| 12 | + DateTime::constant(2000, 1, 1, 0, 0, 0, 0) |
| 13 | +} |
| 14 | + |
| 15 | +/// The number of seconds from the Unix epoch to 2000-01-01 00:00:00 UTC. |
| 16 | +const PG_EPOCH: i64 = 946684800; |
| 17 | + |
| 18 | +fn base_ts() -> Timestamp { |
| 19 | + Timestamp::new(PG_EPOCH, 0).unwrap() |
| 20 | +} |
| 21 | + |
| 22 | +fn round_us<'a>() -> SpanRound<'a> { |
| 23 | + SpanRound::new().largest(Unit::Microsecond) |
| 24 | +} |
| 25 | + |
| 26 | +fn decode_err<E>(_e: E) -> Box<dyn Error + Sync + Send> |
| 27 | +where |
| 28 | + E: Error, |
| 29 | +{ |
| 30 | + "value too large to decode".into() |
| 31 | +} |
| 32 | + |
| 33 | +fn transmit_err<E>(_e: E) -> Box<dyn Error + Sync + Send> |
| 34 | +where |
| 35 | + E: Error, |
| 36 | +{ |
| 37 | + "value too large to transmit".into() |
| 38 | +} |
| 39 | + |
| 40 | +impl<'a> FromSql<'a> for DateTime { |
| 41 | + fn from_sql(_: &Type, raw: &[u8]) -> Result<DateTime, Box<dyn Error + Sync + Send>> { |
| 42 | + let v = types::timestamp_from_sql(raw)?; |
| 43 | + Span::new() |
| 44 | + .try_microseconds(v) |
| 45 | + .and_then(|s| base().checked_add(s)) |
| 46 | + .map_err(decode_err) |
| 47 | + } |
| 48 | + |
| 49 | + accepts!(TIMESTAMP); |
| 50 | +} |
| 51 | + |
| 52 | +impl ToSql for DateTime { |
| 53 | + fn to_sql(&self, _: &Type, w: &mut BytesMut) -> Result<IsNull, Box<dyn Error + Sync + Send>> { |
| 54 | + let v = self |
| 55 | + .since(base()) |
| 56 | + .and_then(|s| s.round(round_us())) |
| 57 | + .map_err(transmit_err)? |
| 58 | + .get_microseconds(); |
| 59 | + types::timestamp_to_sql(v, w); |
| 60 | + Ok(IsNull::No) |
| 61 | + } |
| 62 | + |
| 63 | + accepts!(TIMESTAMP); |
| 64 | + to_sql_checked!(); |
| 65 | +} |
| 66 | + |
| 67 | +impl<'a> FromSql<'a> for Timestamp { |
| 68 | + fn from_sql(_: &Type, raw: &[u8]) -> Result<Timestamp, Box<dyn Error + Sync + Send>> { |
| 69 | + let v = types::timestamp_from_sql(raw)?; |
| 70 | + Span::new() |
| 71 | + .try_microseconds(v) |
| 72 | + .and_then(|s| base_ts().checked_add(s)) |
| 73 | + .map_err(decode_err) |
| 74 | + } |
| 75 | + |
| 76 | + accepts!(TIMESTAMPTZ); |
| 77 | +} |
| 78 | + |
| 79 | +impl ToSql for Timestamp { |
| 80 | + fn to_sql(&self, _: &Type, w: &mut BytesMut) -> Result<IsNull, Box<dyn Error + Sync + Send>> { |
| 81 | + let v = self |
| 82 | + .since(base_ts()) |
| 83 | + .and_then(|s| s.round(round_us())) |
| 84 | + .map_err(transmit_err)? |
| 85 | + .get_microseconds(); |
| 86 | + types::timestamp_to_sql(v, w); |
| 87 | + Ok(IsNull::No) |
| 88 | + } |
| 89 | + |
| 90 | + accepts!(TIMESTAMPTZ); |
| 91 | + to_sql_checked!(); |
| 92 | +} |
| 93 | + |
| 94 | +impl<'a> FromSql<'a> for Date { |
| 95 | + fn from_sql(_: &Type, raw: &[u8]) -> Result<Date, Box<dyn Error + Sync + Send>> { |
| 96 | + let v = types::date_from_sql(raw)?; |
| 97 | + Span::new() |
| 98 | + .try_days(v) |
| 99 | + .and_then(|s| base().date().checked_add(s)) |
| 100 | + .map_err(decode_err) |
| 101 | + } |
| 102 | + accepts!(DATE); |
| 103 | +} |
| 104 | + |
| 105 | +impl ToSql for Date { |
| 106 | + fn to_sql(&self, _: &Type, w: &mut BytesMut) -> Result<IsNull, Box<dyn Error + Sync + Send>> { |
| 107 | + let v = self.since(base().date()).map_err(transmit_err)?.get_days(); |
| 108 | + types::date_to_sql(v, w); |
| 109 | + Ok(IsNull::No) |
| 110 | + } |
| 111 | + |
| 112 | + accepts!(DATE); |
| 113 | + to_sql_checked!(); |
| 114 | +} |
| 115 | + |
| 116 | +impl<'a> FromSql<'a> for Time { |
| 117 | + fn from_sql(_: &Type, raw: &[u8]) -> Result<Time, Box<dyn Error + Sync + Send>> { |
| 118 | + let v = types::time_from_sql(raw)?; |
| 119 | + Span::new() |
| 120 | + .try_microseconds(v) |
| 121 | + .and_then(|s| Time::midnight().checked_add(s)) |
| 122 | + .map_err(decode_err) |
| 123 | + } |
| 124 | + |
| 125 | + accepts!(TIME); |
| 126 | +} |
| 127 | + |
| 128 | +impl ToSql for Time { |
| 129 | + fn to_sql(&self, _: &Type, w: &mut BytesMut) -> Result<IsNull, Box<dyn Error + Sync + Send>> { |
| 130 | + let v = self |
| 131 | + .since(Time::midnight()) |
| 132 | + .and_then(|s| s.round(round_us())) |
| 133 | + .map_err(transmit_err)? |
| 134 | + .get_microseconds(); |
| 135 | + types::time_to_sql(v, w); |
| 136 | + Ok(IsNull::No) |
| 137 | + } |
| 138 | + |
| 139 | + accepts!(TIME); |
| 140 | + to_sql_checked!(); |
| 141 | +} |
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