Idiomatic way to check if a chrono::DateTime<Utc> is within date and time range?-CodePudding

I am curious if there is an idiomatic way to check if a chrono::DateTime<Utc> is within a time range. In my use case I just need to check if the DateTime falls within the next half hour, from current time.

This is what I put together so far. Its using timestamp() attribute to get a raw (unix) timestamp I can work with.

use chrono::prelude::*;
use chrono::Duration;

#[inline(always)]
pub fn in_next_half_hour(input_dt: DateTime<Utc>) -> bool {
    in_future_range(input_dt, 30 * 60)
}

/// Check if a `DateTime` occurs within the following X seconds from now.
pub fn in_future_range(input_dt: DateTime<Utc>, range_seconds: i64) -> bool {
    let utc_now_ts = Utc::now().timestamp();
    let input_ts = input_dt.timestamp();

    let within_range = input_ts > utc_now_ts && input_ts <= utc_now_ts   range_seconds;

    within_range
}

My test cases are something like this:

fn main() {
    let utc_now = Utc::now();

    let input_dt = utc_now - Duration::minutes(15);
    assert_eq!(false, in_next_half_hour(input_dt));

    let input_dt = utc_now   Duration::minutes(15);
    assert_eq!(true, in_next_half_hour(input_dt));

    let input_dt = utc_now   Duration::minutes(25);
    assert_eq!(true, in_next_half_hour(input_dt));

    let input_dt = utc_now   Duration::minutes(35);
    assert_eq!(false, in_next_half_hour(input_dt));

    let input_dt = utc_now - Duration::days(2);
    assert_eq!(false, in_next_half_hour(input_dt));

    let input_dt = utc_now   Duration::days(3);
    assert_eq!(false, in_next_half_hour(input_dt));
}

I am curious if there is a more idiomatic approach to achieve the same result.

CodePudding user response：

If you convert everything to chrono::DateTime and chrono::Duration, things get a lot simpler:

use chrono::prelude::*;
use chrono::Duration;

#[inline(always)]
pub fn in_next_half_hour(input_dt: DateTime<Utc>) -> bool {
    in_future_range(input_dt, Duration::minutes(30))
}

/// Check if a `DateTime` occurs within the following X seconds from now.
pub fn in_future_range(input_dt: DateTime<Utc>, range_dur: Duration) -> bool {
    let utc_now_dt = Utc::now();
    let within_range = utc_now_dt < input_dt && input_dt <= utc_now_dt   range_dur;
    within_range
}

fn main() { /* ... */ }