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Eliminate DateTimeTz and just stick to chrono DateTime with a FixedOffset #129

Merged
savanni merged 1 commits from emseries/streamlined-timestamps into main 2023-12-27 22:25:56 +00:00
Conversation 0 Commits 1 Files Changed 3 +180 -84
3 changed files with 180 additions and 84 deletions
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2
emseries/src/lib.rs
View File

@ -71,11 +71,9 @@ extern crate thiserror;
extern crate uuid;
mod criteria;
mod date_time_tz;
mod series;
mod types;
pub use criteria::*;
pub use date_time_tz::DateTimeTz;
pub use series::Series;
pub use types::{EmseriesReadError, EmseriesWriteError, Recordable, Timestamp, UniqueId};

152
emseries/src/types.rs
View File

@ -10,8 +10,8 @@ Luminescent Dreams Tools is distributed in the hope that it will be useful, but
You should have received a copy of the GNU General Public License along with Lumeto. If not, see <https://www.gnu.org/licenses/>.
*/
use chrono::NaiveDate;
use date_time_tz::DateTimeTz;
use chrono::{DateTime, FixedOffset, NaiveDate};
use chrono_tz::UTC;
use serde::de::DeserializeOwned;
use serde::ser::Serialize;
use std::{cmp::Ordering, fmt, io, str};
@ -44,25 +44,79 @@ pub enum EmseriesWriteError {
JSONWriteError(serde_json::error::Error),
}
#[derive(Debug, Clone, PartialEq, Eq, Serialize, Deserialize)]
#[serde(untagged)]
#[derive(Debug, Clone, PartialEq, Eq)]
/// A Timestamp, stored with reference to human reckoning. This could be either a Naive Date or a
/// date and a time with a timezone. The idea of the "human reckoning" is that, no matter what
/// timezone the record was created in, we want to group things based on the date that the human
/// was perceiving at the time it was recorded.
pub enum Timestamp {
DateTime(DateTimeTz),
DateTime(DateTime<FixedOffset>),
Date(NaiveDate),
}
#[derive(Debug, Clone, Serialize, Deserialize)]
#[serde(untagged)]
pub enum TimestampJS {
DateTime(String),
Date(String),
}
impl From<Timestamp> for TimestampJS {
fn from(s: Timestamp) -> TimestampJS {
match s {
Timestamp::DateTime(ts) => TimestampJS::DateTime(ts.to_rfc3339()),
Timestamp::Date(ts) => TimestampJS::Date(ts.to_string()),
}
}
}
impl From<TimestampJS> for Timestamp {
fn from(s: TimestampJS) -> Timestamp {
match s {
TimestampJS::DateTime(ts) => {
Timestamp::DateTime(DateTime::parse_from_rfc3339(&ts).unwrap())
}
TimestampJS::Date(ts) => Timestamp::Date(ts.parse::<NaiveDate>().unwrap()),
}
}
}
impl str::FromStr for Timestamp {
type Err = chrono::ParseError;
fn from_str(line: &str) -> Result<Self, Self::Err> {
DateTimeTz::from_str(line)
DateTime::parse_from_rfc3339(line)
.map(Timestamp::DateTime)
.or(NaiveDate::from_str(line).map(Timestamp::Date))
}
}
/*
impl PartialEq for Timestamp {
fn eq(&self, other: &Timestamp) -> bool {
match (self, other) {
(Timestamp::DateTime(dt1), Timestamp::DateTime(dt2)) => {
dt1.with_timezone(&UTC) == dt2.with_timezone(&UTC)
}
// It's not clear to me what would make sense when I'm comparing a date and a
// timestamp. I'm going with a naive date comparison on the idea that what I'm wanting
// here is human scale, again.
(Timestamp::DateTime(dt1), Timestamp::Date(dt2)) => dt1.date_naive() == *dt2,
(Timestamp::Date(dt1), Timestamp::DateTime(dt2)) => *dt1 == dt2.date_naive(),
(Timestamp::Date(dt1), Timestamp::Date(dt2)) => *dt1 == *dt2,
}
}
}
*/
impl PartialOrd for Timestamp {
fn partial_cmp(&self, other: &Timestamp) -> Option<Ordering> {
Some(self.cmp(other))
// Some(self.cmp(other))
match (self, other) {
(Timestamp::DateTime(dt1), Timestamp::DateTime(dt2)) => dt1.partial_cmp(dt2),
(Timestamp::DateTime(dt1), Timestamp::Date(dt2)) => dt1.date_naive().partial_cmp(dt2),
(Timestamp::Date(dt1), Timestamp::DateTime(dt2)) => dt1.partial_cmp(&dt2.date_naive()),
(Timestamp::Date(dt1), Timestamp::Date(dt2)) => dt1.partial_cmp(dt2),
}
}
}
@ -70,25 +124,13 @@ impl Ord for Timestamp {
fn cmp(&self, other: &Timestamp) -> Ordering {
match (self, other) {
(Timestamp::DateTime(dt1), Timestamp::DateTime(dt2)) => dt1.cmp(dt2),
(Timestamp::DateTime(dt1), Timestamp::Date(dt2)) => dt1.0.date_naive().cmp(dt2),
(Timestamp::Date(dt1), Timestamp::DateTime(dt2)) => dt1.cmp(&dt2.0.date_naive()),
(Timestamp::DateTime(dt1), Timestamp::Date(dt2)) => dt1.date_naive().cmp(dt2),
(Timestamp::Date(dt1), Timestamp::DateTime(dt2)) => dt1.cmp(&dt2.date_naive()),
(Timestamp::Date(dt1), Timestamp::Date(dt2)) => dt1.cmp(dt2),
}
}
}
impl From<DateTimeTz> for Timestamp {
fn from(d: DateTimeTz) -> Self {
Self::DateTime(d)
}
}
impl From<NaiveDate> for Timestamp {
fn from(d: NaiveDate) -> Self {
Self::Date(d)
}
}
/// Any element to be put into the database needs to be Recordable. This is the common API that
/// will aid in searching and later in indexing records.
pub trait Recordable {
@ -156,21 +198,20 @@ mod test {
use self::dimensioned::si::{Kilogram, KG};
use super::*;
use chrono::TimeZone;
use chrono_tz::{Etc::UTC, US::Central};
use date_time_tz::DateTimeTz;
use chrono_tz::Etc::UTC;
#[derive(Clone, Debug, PartialEq, Deserialize, Serialize)]
pub struct Weight(Kilogram<f64>);
#[derive(Clone, Debug, PartialEq, Deserialize, Serialize)]
pub struct WeightRecord {
pub date: Timestamp,
pub date: NaiveDate,
pub weight: Weight,
}
impl Recordable for WeightRecord {
fn timestamp(&self) -> Timestamp {
self.date.clone()
Timestamp::Date(self.date.clone())
}
fn tags(&self) -> Vec<String> {
@ -179,12 +220,14 @@ mod test {
}
#[test]
fn timestamp_parses_datetimetz_without_timezone() {
fn timestamp_parses_utc_time() {
assert_eq!(
"2003-11-10T06:00:00Z".parse::<Timestamp>().unwrap(),
Timestamp::DateTime(DateTimeTz(
UTC.with_ymd_and_hms(2003, 11, 10, 6, 0, 0).unwrap()
)),
Timestamp::DateTime(
UTC.with_ymd_and_hms(2003, 11, 10, 6, 0, 0)
.unwrap()
.with_timezone(&FixedOffset::east_opt(0).unwrap())
),
);
}
@ -196,9 +239,9 @@ mod test {
);
}
#[test]
#[ignore]
fn v_alpha_serialization() {
const WEIGHT_ENTRY: &str = "{\"data\":{\"weight\":77.79109,\"date\":\"2003-11-10T06:00:00.000000000000Z\"},\"id\":\"3330c5b0-783f-4919-b2c4-8169c38f65ff\"}";
const WEIGHT_ENTRY: &str = "{\"data\":{\"weight\":77.79109},\"date\":\"2003-11-10\",\"id\":\"3330c5b0-783f-4919-b2c4-8169c38f65ff\"}";
let rec: Record<WeightRecord> = WEIGHT_ENTRY
.parse()
@ -210,9 +253,7 @@ mod test {
assert_eq!(
rec.data,
Some(WeightRecord {
date: Timestamp::DateTime(DateTimeTz(
UTC.with_ymd_and_hms(2003, 11, 10, 6, 0, 0).unwrap()
)),
date: NaiveDate::from_ymd_opt(2003, 11, 10).unwrap(),
weight: Weight(77.79109 * KG),
})
);
@ -221,54 +262,53 @@ mod test {
#[test]
fn serialization_output() {
let rec = WeightRecord {
date: Timestamp::DateTime(DateTimeTz(
UTC.with_ymd_and_hms(2003, 11, 10, 6, 0, 0).unwrap(),
)),
date: NaiveDate::from_ymd_opt(2003, 11, 10).unwrap(),
weight: Weight(77.0 * KG),
};
assert_eq!(
serde_json::to_string(&rec).unwrap(),
"{\"date\":\"2003-11-10T06:00:00Z\",\"weight\":77.0}"
"{\"date\":\"2003-11-10\",\"weight\":77.0}"
);
let rec2 = WeightRecord {
date: Timestamp::DateTime(
Central
.with_ymd_and_hms(2003, 11, 10, 0, 0, 0)
.unwrap()
.into(),
),
date: NaiveDate::from_ymd_opt(2003, 11, 10).unwrap(),
weight: Weight(77.0 * KG),
};
assert_eq!(
serde_json::to_string(&rec2).unwrap(),
"{\"date\":\"2003-11-10T06:00:00Z US/Central\",\"weight\":77.0}"
"{\"date\":\"2003-11-10\",\"weight\":77.0}"
);
}
#[test]
fn two_datetimes_can_be_compared() {
let time1 = Timestamp::DateTime(DateTimeTz(
UTC.with_ymd_and_hms(2003, 11, 10, 6, 0, 0).unwrap(),
));
let time2 = Timestamp::DateTime(DateTimeTz(
UTC.with_ymd_and_hms(2003, 11, 11, 6, 0, 0).unwrap(),
));
let time1 = Timestamp::DateTime(
UTC.with_ymd_and_hms(2003, 11, 10, 6, 0, 0)
.unwrap()
.with_timezone(&FixedOffset::east_opt(0).unwrap()),
);
let time2 = Timestamp::DateTime(
UTC.with_ymd_and_hms(2003, 11, 11, 6, 0, 0)
.unwrap()
.with_timezone(&FixedOffset::east_opt(0).unwrap()),
);
assert!(time1 < time2);
}
#[test]
fn two_dates_can_be_compared() {
let time1 = Timestamp::Date(NaiveDate::from_ymd_opt(2003, 11, 10).unwrap());
let time2 = Timestamp::Date(NaiveDate::from_ymd_opt(2003, 11, 11).unwrap());
let time1: Timestamp = Timestamp::Date(NaiveDate::from_ymd_opt(2003, 11, 10).unwrap());
let time2: Timestamp = Timestamp::Date(NaiveDate::from_ymd_opt(2003, 11, 11).unwrap());
assert!(time1 < time2);
}
#[test]
fn datetime_and_date_can_be_compared() {
let time1 = Timestamp::DateTime(DateTimeTz(
UTC.with_ymd_and_hms(2003, 11, 10, 6, 0, 0).unwrap(),
));
let time1 = Timestamp::DateTime(
UTC.with_ymd_and_hms(2003, 11, 10, 6, 0, 0)
.unwrap()
.with_timezone(&FixedOffset::east_opt(0).unwrap()),
);
let time2 = Timestamp::Date(NaiveDate::from_ymd_opt(2003, 11, 11).unwrap());
assert!(time1 < time2)
}

110
emseries/tests/test_io.rs
View File

@ -20,7 +20,7 @@ extern crate emseries;
#[cfg(test)]
mod test {
use chrono::prelude::*;
use chrono::{format::Fixed, prelude::*};
use chrono_tz::Etc::UTC;
use dimensioned::si::{Kilogram, Meter, Second, M, S};
@ -34,7 +34,7 @@ mod test {
#[derive(Clone, Debug, PartialEq, Deserialize, Serialize)]
struct BikeTrip {
datetime: DateTimeTz,
datetime: DateTime<FixedOffset>,
distance: Distance,
duration: Duration,
comments: String,
@ -42,7 +42,7 @@ mod test {
impl Recordable for BikeTrip {
fn timestamp(&self) -> Timestamp {
self.datetime.clone().into()
Timestamp::DateTime(self.datetime.clone())
}
fn tags(&self) -> Vec<String> {
Vec::new()
@ -52,31 +52,46 @@ mod test {
fn mk_trips() -> [BikeTrip; 5] {
[
BikeTrip {
datetime: DateTimeTz(UTC.with_ymd_and_hms(2011, 10, 29, 0, 0, 0).unwrap()),
datetime: UTC
.with_ymd_and_hms(2011, 10, 29, 0, 0, 0)
.unwrap()
.with_timezone(&FixedOffset::east_opt(0).unwrap()),
distance: Distance(58741.055 * M),
duration: Duration(11040.0 * S),
comments: String::from("long time ago"),
},
BikeTrip {
datetime: DateTimeTz(UTC.with_ymd_and_hms(2011, 10, 31, 0, 0, 0).unwrap()),
datetime: UTC
.with_ymd_and_hms(2011, 10, 31, 0, 0, 0)
.unwrap()
.with_timezone(&FixedOffset::east_opt(0).unwrap()),
distance: Distance(17702.0 * M),
duration: Duration(2880.0 * S),
comments: String::from("day 2"),
},
BikeTrip {
datetime: DateTimeTz(UTC.with_ymd_and_hms(2011, 11, 02, 0, 0, 0).unwrap()),
datetime: UTC
.with_ymd_and_hms(2011, 11, 02, 0, 0, 0)
.unwrap()
.with_timezone(&FixedOffset::east_opt(0).unwrap()),
distance: Distance(41842.945 * M),
duration: Duration(7020.0 * S),
comments: String::from("Do Some Distance!"),
},
BikeTrip {
datetime: DateTimeTz(UTC.with_ymd_and_hms(2011, 11, 04, 0, 0, 0).unwrap()),
datetime: UTC
.with_ymd_and_hms(2011, 11, 04, 0, 0, 0)
.unwrap()
.with_timezone(&FixedOffset::east_opt(0).unwrap()),
distance: Distance(34600.895 * M),
duration: Duration(5580.0 * S),
comments: String::from("I did a lot of distance back then"),
},
BikeTrip {
datetime: DateTimeTz(UTC.with_ymd_and_hms(2011, 11, 05, 0, 0, 0).unwrap()),
datetime: UTC
.with_ymd_and_hms(2011, 11, 05, 0, 0, 0)
.unwrap()
.with_timezone(&FixedOffset::east_opt(0).unwrap()),
distance: Distance(6437.376 * M),
duration: Duration(960.0 * S),
comments: String::from("day 5"),
@ -122,7 +137,11 @@ mod test {
Some(tr) => {
assert_eq!(
tr.timestamp(),
DateTimeTz(UTC.with_ymd_and_hms(2011, 10, 29, 0, 0, 0).unwrap()).into()
Timestamp::DateTime(
UTC.with_ymd_and_hms(2011, 10, 29, 0, 0, 0)
.unwrap()
.with_timezone(&FixedOffset::east_opt(0).unwrap())
)
);
assert_eq!(tr.duration, Duration(11040.0 * S));
assert_eq!(tr.comments, String::from("long time ago"));
@ -144,9 +163,11 @@ mod test {
}
let v: Vec<(&UniqueId, &BikeTrip)> = ts
.search(exact_time(
DateTimeTz(UTC.with_ymd_and_hms(2011, 10, 31, 0, 0, 0).unwrap()).into(),
))
.search(exact_time(Timestamp::DateTime(
UTC.with_ymd_and_hms(2011, 10, 31, 0, 0, 0)
.unwrap()
.with_timezone(&FixedOffset::east_opt(0).unwrap()),
)))
.collect();
assert_eq!(v.len(), 1);
assert_eq!(*v[0].1, trips[1]);
@ -166,9 +187,17 @@ mod test {
let v: Vec<(&UniqueId, &BikeTrip)> = ts.search_sorted(
time_range(
DateTimeTz(UTC.with_ymd_and_hms(2011, 10, 31, 0, 0, 0).unwrap()).into(),
Timestamp::DateTime(
UTC.with_ymd_and_hms(2011, 10, 31, 0, 0, 0)
.unwrap()
.with_timezone(&FixedOffset::east_opt(0).unwrap()),
),
true,
DateTimeTz(UTC.with_ymd_and_hms(2011, 11, 04, 0, 0, 0).unwrap()).into(),
Timestamp::DateTime(
UTC.with_ymd_and_hms(2011, 11, 04, 0, 0, 0)
.unwrap()
.with_timezone(&FixedOffset::east_opt(0).unwrap()),
),
true,
),
|l, r| l.1.timestamp().cmp(&r.1.timestamp()),
@ -199,9 +228,17 @@ mod test {
Series::open(&path).expect("expect the time series to open correctly");
let v: Vec<(&UniqueId, &BikeTrip)> = ts.search_sorted(
time_range(
DateTimeTz(UTC.with_ymd_and_hms(2011, 10, 31, 0, 0, 0).unwrap()).into(),
Timestamp::DateTime(
UTC.with_ymd_and_hms(2011, 10, 31, 0, 0, 0)
.unwrap()
.with_timezone(&FixedOffset::east_opt(0).unwrap()),
),
true,
DateTimeTz(UTC.with_ymd_and_hms(2011, 11, 04, 0, 0, 0).unwrap()).into(),
Timestamp::DateTime(
UTC.with_ymd_and_hms(2011, 11, 04, 0, 0, 0)
.unwrap()
.with_timezone(&FixedOffset::east_opt(0).unwrap()),
),
true,
),
|l, r| l.1.timestamp().cmp(&r.1.timestamp()),
@ -233,9 +270,18 @@ mod test {
Series::open(&path).expect("expect the time series to open correctly");
let v: Vec<(&UniqueId, &BikeTrip)> = ts.search_sorted(
time_range(
DateTimeTz(UTC.with_ymd_and_hms(2011, 10, 31, 0, 0, 0).unwrap()).into(),
Timestamp::DateTime(
UTC.with_ymd_and_hms(2011, 10, 31, 0, 0, 0)
.unwrap()
.with_timezone(&FixedOffset::east_opt(0).unwrap()),
),
true,
DateTimeTz(UTC.with_ymd_and_hms(2011, 11, 04, 0, 0, 0).unwrap()).into(),
Timestamp::DateTime(
UTC.with_ymd_and_hms(2011, 11, 04, 0, 0, 0)
.unwrap()
.with_timezone(&FixedOffset::east_opt(0).unwrap()),
)
.into(),
true,
),
|l, r| l.1.timestamp().cmp(&r.1.timestamp()),
@ -252,9 +298,17 @@ mod test {
Series::open(&path).expect("expect the time series to open correctly");
let v: Vec<(&UniqueId, &BikeTrip)> = ts.search_sorted(
time_range(
DateTimeTz(UTC.with_ymd_and_hms(2011, 10, 31, 0, 0, 0).unwrap()).into(),
Timestamp::DateTime(
UTC.with_ymd_and_hms(2011, 10, 31, 0, 0, 0)
.unwrap()
.with_timezone(&FixedOffset::east_opt(0).unwrap()),
),
true,
DateTimeTz(UTC.with_ymd_and_hms(2011, 11, 05, 0, 0, 0).unwrap()).into(),
Timestamp::DateTime(
UTC.with_ymd_and_hms(2011, 11, 05, 0, 0, 0)
.unwrap()
.with_timezone(&FixedOffset::east_opt(0).unwrap()),
),
true,
),
|l, r| l.1.timestamp().cmp(&r.1.timestamp()),
@ -294,7 +348,7 @@ mod test {
Some(trip) => {
assert_eq!(
trip.datetime,
DateTimeTz(UTC.with_ymd_and_hms(2011, 11, 02, 0, 0, 0).unwrap())
UTC.with_ymd_and_hms(2011, 11, 02, 0, 0, 0).unwrap()
);
assert_eq!(trip.distance, Distance(50000.0 * M));
assert_eq!(trip.duration, Duration(7020.0 * S));
@ -334,14 +388,18 @@ mod test {
assert_eq!(trips.len(), 3);
let trips: Vec<(&UniqueId, &BikeTrip)> = ts
.search(exact_time(
DateTimeTz(UTC.with_ymd_and_hms(2011, 11, 02, 0, 0, 0).unwrap()).into(),
))
.search(exact_time(Timestamp::DateTime(
UTC.with_ymd_and_hms(2011, 11, 02, 0, 0, 0)
.unwrap()
.with_timezone(&FixedOffset::east_opt(0).unwrap()),
)))
.collect();
assert_eq!(trips.len(), 1);
assert_eq!(
trips[0].1.datetime,
DateTimeTz(UTC.with_ymd_and_hms(2011, 11, 02, 0, 0, 0).unwrap())
UTC.with_ymd_and_hms(2011, 11, 02, 0, 0, 0)
.unwrap()
.with_timezone(&FixedOffset::east_opt(0).unwrap())
);
assert_eq!(trips[0].1.distance, Distance(50000.0 * M));
assert_eq!(trips[0].1.duration, Duration(7020.0 * S));
@ -387,7 +445,7 @@ mod test {
impl Recordable for WeightRecord {
fn timestamp(&self) -> Timestamp {
self.date.into()
Timestamp::Date(self.date)
}
fn tags(&self) -> Vec<String> {