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use chrono::{DateTime, Local, NaiveDate, NaiveDateTime};
use std::time::SystemTime;
/// Filter based on time ranges.
#[derive(Debug, PartialEq, Eq)]
pub enum TimeFilter {
Before(SystemTime),
After(SystemTime),
}
impl TimeFilter {
fn from_str(ref_time: &SystemTime, s: &str) -> Option<SystemTime> {
humantime::parse_duration(s)
.map(|duration| *ref_time - duration)
.ok()
.or_else(|| {
DateTime::parse_from_rfc3339(s)
.map(|dt| dt.into())
.ok()
.or_else(|| {
NaiveDate::parse_from_str(s, "%F")
.ok()?
.and_hms_opt(0, 0, 0)?
.and_local_timezone(Local)
.latest()
})
.or_else(|| {
NaiveDateTime::parse_from_str(s, "%F %T")
.ok()?
.and_local_timezone(Local)
.latest()
})
.or_else(|| {
let timestamp_secs = s.strip_prefix('@')?.parse().ok()?;
DateTime::from_timestamp(timestamp_secs, 0).map(Into::into)
})
.map(|dt| dt.into())
})
}
pub fn before(ref_time: &SystemTime, s: &str) -> Option<TimeFilter> {
TimeFilter::from_str(ref_time, s).map(TimeFilter::Before)
}
pub fn after(ref_time: &SystemTime, s: &str) -> Option<TimeFilter> {
TimeFilter::from_str(ref_time, s).map(TimeFilter::After)
}
pub fn applies_to(&self, t: &SystemTime) -> bool {
match self {
TimeFilter::Before(limit) => t < limit,
TimeFilter::After(limit) => t > limit,
}
}
}
#[cfg(test)]
mod tests {
use super::*;
use std::time::Duration;
#[test]
fn is_time_filter_applicable() {
let ref_time = NaiveDateTime::parse_from_str("2010-10-10 10:10:10", "%F %T")
.unwrap()
.and_local_timezone(Local)
.latest()
.unwrap()
.into();
assert!(TimeFilter::after(&ref_time, "1min")
.unwrap()
.applies_to(&ref_time));
assert!(!TimeFilter::before(&ref_time, "1min")
.unwrap()
.applies_to(&ref_time));
let t1m_ago = ref_time - Duration::from_secs(60);
assert!(!TimeFilter::after(&ref_time, "30sec")
.unwrap()
.applies_to(&t1m_ago));
assert!(TimeFilter::after(&ref_time, "2min")
.unwrap()
.applies_to(&t1m_ago));
assert!(TimeFilter::before(&ref_time, "30sec")
.unwrap()
.applies_to(&t1m_ago));
assert!(!TimeFilter::before(&ref_time, "2min")
.unwrap()
.applies_to(&t1m_ago));
let t10s_before = "2010-10-10 10:10:00";
assert!(!TimeFilter::before(&ref_time, t10s_before)
.unwrap()
.applies_to(&ref_time));
assert!(TimeFilter::before(&ref_time, t10s_before)
.unwrap()
.applies_to(&t1m_ago));
assert!(TimeFilter::after(&ref_time, t10s_before)
.unwrap()
.applies_to(&ref_time));
assert!(!TimeFilter::after(&ref_time, t10s_before)
.unwrap()
.applies_to(&t1m_ago));
let same_day = "2010-10-10";
assert!(!TimeFilter::before(&ref_time, same_day)
.unwrap()
.applies_to(&ref_time));
assert!(!TimeFilter::before(&ref_time, same_day)
.unwrap()
.applies_to(&t1m_ago));
assert!(TimeFilter::after(&ref_time, same_day)
.unwrap()
.applies_to(&ref_time));
assert!(TimeFilter::after(&ref_time, same_day)
.unwrap()
.applies_to(&t1m_ago));
let ref_time = DateTime::parse_from_rfc3339("2010-10-10T10:10:10+00:00")
.unwrap()
.into();
let t1m_ago = ref_time - Duration::from_secs(60);
let t10s_before = "2010-10-10T10:10:00+00:00";
assert!(!TimeFilter::before(&ref_time, t10s_before)
.unwrap()
.applies_to(&ref_time));
assert!(TimeFilter::before(&ref_time, t10s_before)
.unwrap()
.applies_to(&t1m_ago));
assert!(TimeFilter::after(&ref_time, t10s_before)
.unwrap()
.applies_to(&ref_time));
assert!(!TimeFilter::after(&ref_time, t10s_before)
.unwrap()
.applies_to(&t1m_ago));
let ref_timestamp = 1707723412u64; // Mon Feb 12 07:36:52 UTC 2024
let ref_time = DateTime::parse_from_rfc3339("2024-02-12T07:36:52+00:00")
.unwrap()
.into();
let t1m_ago = ref_time - Duration::from_secs(60);
let t1s_later = ref_time + Duration::from_secs(1);
// Timestamp only supported via '@' prefix
assert!(TimeFilter::before(&ref_time, &ref_timestamp.to_string()).is_none());
assert!(
TimeFilter::before(&ref_time, &format!("@{}", ref_timestamp))
.unwrap()
.applies_to(&t1m_ago)
);
assert!(
!TimeFilter::before(&ref_time, &format!("@{}", ref_timestamp))
.unwrap()
.applies_to(&t1s_later)
);
assert!(
!TimeFilter::after(&ref_time, &format!("@{}", ref_timestamp))
.unwrap()
.applies_to(&t1m_ago)
);
assert!(TimeFilter::after(&ref_time, &format!("@{}", ref_timestamp))
.unwrap()
.applies_to(&t1s_later));
}
}
|
