default since is today

src/main.rs

@@ -4,7 +4,7 @@ use std::fs::File;
 use std::time::{SystemTime, UNIX_EPOCH, Duration};
 use std::ops::{Add, Sub};
 use clap::Parser;
-use chrono::DateTime;
+use chrono::{TimeZone, Local, Timelike};
 
 #[derive(Debug, Parser)]
 struct Flags {
@@ -108,19 +108,17 @@ fn parse_time(since: &Option<String>) -> Result<SystemTime, String> {
    match since {
       Some(since) => {
          match chrono::NaiveDate::parse_from_str(since, "%Y-%m-%d") {
-            Ok(dt) => {
+            Ok(nd) => {
+               let ndt = nd.and_hms_opt(1, 1, 1).unwrap();
+               let dt = Local.from_local_datetime(&ndt).unwrap();
                Ok(UNIX_EPOCH.add(
-                  Duration::from_secs(
-                     dt.and_hms_opt(1, 1, 1)
-                        .unwrap()
-                        .timestamp() as u64
-                  )
+                  Duration::from_secs(dt.timestamp() as u64)
                ))
             },
             Err(msg) => Err(format!("failed to parse {}: {}", since, msg)),
          }
       },
-      None => Ok(SystemTime::now().sub(Duration::from_secs(60*60*24*7))),
+      None => Ok(SystemTime::now().sub(Duration::from_secs(Local::now().hour() as u64*60*60))),
    }
 }
 
@@ -222,7 +220,7 @@ impl X {
    }
 
    fn timestamp(&self) -> String {
-      let dt = DateTime::from_timestamp(self.t, 0).unwrap();
+      let dt = Local.timestamp_opt(self.t, 0).unwrap();
       dt.format("%Y-%m-%d").to_string()
    }
 }