gstreamer-rs/gstreamer/src/date_time_serde.rs

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// Copyright (C) 2018 François Laignel <fengalin@free.fr>
//
// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
// option. This file may not be copied, modified, or distributed
// except according to those terms.
use serde::de::{Deserialize, Deserializer};
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use serde::ser;
use serde::ser::{Serialize, Serializer};
use DateTime;
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#[derive(Serialize, Deserialize)]
enum DateTimeVariants {
Y(i32),
YM(i32, i32),
YMD(i32, i32, i32),
YMDhmTz(i32, i32, i32, i32, i32, f32),
YMDhmsTz(i32, i32, i32, i32, i32, f64, f32),
}
impl<'a> Serialize for DateTime {
fn serialize<S: Serializer>(&self, serializer: S) -> Result<S::Ok, S::Error> {
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let variant = if self.has_second() {
DateTimeVariants::YMDhmsTz(
self.get_year(),
self.get_month(),
self.get_day(),
self.get_hour(),
self.get_minute(),
(self.get_second() as f64) + (self.get_microsecond() as f64) / 1_000_000f64,
self.get_time_zone_offset(),
)
} else if self.has_time() {
DateTimeVariants::YMDhmTz(
self.get_year(),
self.get_month(),
self.get_day(),
self.get_hour(),
self.get_minute(),
self.get_time_zone_offset(),
)
} else if self.has_day() {
DateTimeVariants::YMD(self.get_year(), self.get_month(), self.get_day())
} else if self.has_month() {
DateTimeVariants::YM(self.get_year(), self.get_month())
} else if self.has_year() {
DateTimeVariants::Y(self.get_year())
} else {
return Err(ser::Error::custom(format!(
"no parts could be found in `DateTime` {}",
self,
)));
};
variant.serialize(serializer)
}
}
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impl From<DateTimeVariants> for DateTime {
fn from(dt_variant: DateTimeVariants) -> Self {
match dt_variant {
DateTimeVariants::Y(y) => DateTime::new_y(y),
DateTimeVariants::YM(y, m) => DateTime::new_ym(y, m),
DateTimeVariants::YMD(y, m, d) => DateTime::new_ymd(y, m, d),
DateTimeVariants::YMDhmTz(y, m, d, h, mn, tz) => {
DateTime::new(tz, y, m, d, h, mn, -1f64)
}
DateTimeVariants::YMDhmsTz(y, m, d, h, mn, s, tz) => {
DateTime::new(tz, y, m, d, h, mn, s)
}
}
}
}
impl<'de> Deserialize<'de> for DateTime {
fn deserialize<D: Deserializer<'de>>(deserializer: D) -> Result<Self, D::Error> {
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DateTimeVariants::deserialize(deserializer).map(|dt_variant| dt_variant.into())
}
}
#[cfg(test)]
mod tests {
extern crate ron;
extern crate serde_json;
use DateTime;
#[test]
fn test_serialize() {
::init().unwrap();
let mut pretty_config = ron::ser::PrettyConfig::default();
pretty_config.new_line = "".to_string();
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let datetime = DateTime::new(2f32, 2018, 5, 28, 16, 6, 42.123_456f64);
let res = ron::ser::to_string_pretty(&datetime, pretty_config.clone());
assert_eq!(
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Ok("YMDhmsTz(2018, 5, 28, 16, 6, 42.123456, 2)".to_owned()),
res,
);
let res = serde_json::to_string(&datetime).unwrap();
assert_eq!(
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"{\"YMDhmsTz\":[2018,5,28,16,6,42.123456,2.0]}".to_owned(),
res
);
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let datetime = DateTime::new(2f32, 2018, 5, 28, 16, 6, -1f64);
let res = ron::ser::to_string_pretty(&datetime, pretty_config.clone());
assert_eq!(Ok("YMDhmTz(2018, 5, 28, 16, 6, 2)".to_owned()), res,);
let datetime = DateTime::new_ymd(2018, 5, 28);
let res = ron::ser::to_string_pretty(&datetime, pretty_config.clone());
assert_eq!(Ok("YMD(2018, 5, 28)".to_owned()), res);
let datetime = DateTime::new_ym(2018, 5);
let res = ron::ser::to_string_pretty(&datetime, pretty_config.clone());
assert_eq!(Ok("YM(2018, 5)".to_owned()), res);
let datetime = DateTime::new_y(2018);
let res = ron::ser::to_string_pretty(&datetime, pretty_config.clone());
assert_eq!(Ok("Y(2018)".to_owned()), res);
}
#[test]
fn test_deserialize() {
::init().unwrap();
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let datetime_ron = "YMDhmsTz(2018, 5, 28, 16, 6, 42.123456, 2)";
let datetime_de: DateTime = ron::de::from_str(datetime_ron).unwrap();
assert_eq!(datetime_de.get_time_zone_offset(), 2f32);
assert_eq!(datetime_de.get_year(), 2018);
assert_eq!(datetime_de.get_month(), 5);
assert_eq!(datetime_de.get_day(), 28);
assert_eq!(datetime_de.get_hour(), 16);
assert_eq!(datetime_de.get_minute(), 6);
assert_eq!(datetime_de.get_second(), 42);
assert_eq!(datetime_de.get_microsecond(), 123_456);
let datetime_json = "{\"YMDhmsTz\":[2018,5,28,16,6,42.123456,2.0]}";
let datetime_de: DateTime = serde_json::from_str(datetime_json).unwrap();
assert_eq!(datetime_de.get_time_zone_offset(), 2f32);
assert_eq!(datetime_de.get_year(), 2018);
assert_eq!(datetime_de.get_month(), 5);
assert_eq!(datetime_de.get_day(), 28);
assert_eq!(datetime_de.get_hour(), 16);
assert_eq!(datetime_de.get_minute(), 6);
assert_eq!(datetime_de.get_second(), 42);
assert_eq!(datetime_de.get_microsecond(), 123_456);
let datetime_ron = "YMDhmTz(2018, 5, 28, 16, 6, 2)";
let datetime_de: DateTime = ron::de::from_str(datetime_ron).unwrap();
assert!(datetime_de.has_time());
assert!(!datetime_de.has_second());
assert_eq!(datetime_de.get_time_zone_offset(), 2f32);
assert_eq!(datetime_de.get_year(), 2018);
assert_eq!(datetime_de.get_month(), 5);
assert_eq!(datetime_de.get_day(), 28);
assert_eq!(datetime_de.get_hour(), 16);
assert_eq!(datetime_de.get_minute(), 6);
let datetime_ron = "YMD(2018, 5, 28)";
let datetime_de: DateTime = ron::de::from_str(datetime_ron).unwrap();
assert!(datetime_de.has_day());
assert!(!datetime_de.has_time());
assert_eq!(datetime_de.get_year(), 2018);
assert_eq!(datetime_de.get_month(), 5);
assert_eq!(datetime_de.get_day(), 28);
let datetime_ron = "YM(2018, 5)";
let datetime_de: DateTime = ron::de::from_str(datetime_ron).unwrap();
assert!(datetime_de.has_month());
assert!(!datetime_de.has_day());
assert_eq!(datetime_de.get_year(), 2018);
assert_eq!(datetime_de.get_month(), 5);
let datetime_ron = "Y(2018)";
let datetime_de: DateTime = ron::de::from_str(datetime_ron).unwrap();
assert!(datetime_de.has_year());
assert!(!datetime_de.has_month());
assert_eq!(datetime_de.get_year(), 2018);
}
#[test]
fn test_serde_roundtrip() {
::init().unwrap();
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let datetime = DateTime::new(2f32, 2018, 5, 28, 16, 6, 42.123_456f64);
let datetime_ser = ron::ser::to_string(&datetime).unwrap();
let datetime_de: DateTime = ron::de::from_str(datetime_ser.as_str()).unwrap();
assert_eq!(
datetime_de.get_time_zone_offset(),
datetime.get_time_zone_offset()
);
assert_eq!(datetime_de.get_year(), datetime.get_year());
assert_eq!(datetime_de.get_month(), datetime.get_month());
assert_eq!(datetime_de.get_day(), datetime.get_day());
assert_eq!(datetime_de.get_hour(), datetime.get_hour());
assert_eq!(datetime_de.get_minute(), datetime.get_minute());
assert_eq!(datetime_de.get_second(), datetime.get_second());
assert_eq!(datetime_de.get_microsecond(), datetime.get_microsecond());
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let datetime = DateTime::new(2f32, 2018, 5, 28, 16, 6, -1f64);
let datetime_ser = ron::ser::to_string(&datetime).unwrap();
let datetime_de: DateTime = ron::de::from_str(datetime_ser.as_str()).unwrap();
assert!(datetime_de.has_time());
assert!(!datetime_de.has_second());
assert_eq!(
datetime_de.get_time_zone_offset(),
datetime.get_time_zone_offset()
);
assert_eq!(datetime_de.get_year(), datetime.get_year());
assert_eq!(datetime_de.get_month(), datetime.get_month());
assert_eq!(datetime_de.get_day(), datetime.get_day());
assert_eq!(datetime_de.get_hour(), datetime.get_hour());
assert_eq!(datetime_de.get_minute(), datetime.get_minute());
let datetime = DateTime::new_ymd(2018, 5, 28);
let datetime_ser = ron::ser::to_string(&datetime).unwrap();
let datetime_de: DateTime = ron::de::from_str(datetime_ser.as_str()).unwrap();
assert!(datetime_de.has_day());
assert!(!datetime_de.has_time());
assert_eq!(datetime_de.get_year(), datetime.get_year());
assert_eq!(datetime_de.get_month(), datetime.get_month());
assert_eq!(datetime_de.get_day(), datetime.get_day());
let datetime = DateTime::new_ym(2018, 5);
let datetime_ser = ron::ser::to_string(&datetime).unwrap();
let datetime_de: DateTime = ron::de::from_str(datetime_ser.as_str()).unwrap();
assert!(datetime_de.has_month());
assert!(!datetime_de.has_day());
assert_eq!(datetime_de.get_year(), datetime.get_year());
assert_eq!(datetime_de.get_month(), datetime.get_month());
let datetime = DateTime::new_y(2018);
let datetime_ser = ron::ser::to_string(&datetime).unwrap();
let datetime_de: DateTime = ron::de::from_str(datetime_ser.as_str()).unwrap();
assert!(datetime_de.has_year());
assert!(!datetime_de.has_month());
assert_eq!(datetime_de.get_year(), datetime.get_year());
}
}