Coming from chrono: Working with multiple timezone is a breeze

[azzamsa]

Hi, 👋🏽

I ported my code to track my co-worker's time, and it was a breeze.
I can achieve the same output with less code that's more reliable.
I tested the hour output, and it matches exactly with Chrono.

modified cli/scripts/ntz
@@ -4,7 +4,7 @@
 edition = "2021"

 [dependencies]
-chrono = "0.4.38"
+jiff = "0.1.3"
 owo-colors = "4.0"
 anyhow = "1.0"
 ---
@@ -26,9 +26,8 @@ anyhow = "1.0"

-use anyhow::anyhow;
-use chrono::prelude::*;
 use owo_colors::OwoColorize;
+use jiff::{Unit, Zoned};

 fn main() -> anyhow::Result<()> {
     run()?;
@@ -36,51 +35,27 @@ fn main() -> anyhow::Result<()> {
     Ok(())
 }

-// FixedOffset::east -> Use this when the local time is ahead of UTC.
-// Examples: Japan (UTC+9), Norway (UTC+2)
-//
-// FixedOffset::west -> Use this when the local time is behind UTC.
-// Examples: New York (UTC-5), Los Angeles (UTC-8)
 fn run() -> anyhow::Result<()> {
-    let now = Utc::now();
+    let now= Zoned::now().round(Unit::Second)?;

     // Cape Town, South Africa (UTC+2)
-    show_time(now, &offset(Direction::East, 2)?, "Cape Town, South Africa");
+    show_time(now.intz("Africa/Johannesburg")?, "Cape Town, South Africa");
     let friends = vec!["Alice"];
     show_friends(&friends);

     // San Francisco, USA (UTC-7)
-    show_time(now, &offset(Direction::West, 7)?, "San Francisco, USA");
+    show_time(now.intz("America/Los_Angeles")?, "San Francisco, USA");
     let friends = vec!["Bob", "Aragorn"];
     show_friends(&friends);

     Ok(())
 }

-// offset direction
-enum Direction {
-    West,
-    East,
-}
-
-// Get offset
-fn offset(direction: Direction, hour: i32) -> anyhow::Result<FixedOffset> {
-    let hour_ = |n: i32| n * 3600;
-
-    let result = match direction {
-        Direction::West => FixedOffset::west_opt(hour_(hour)),
-        Direction::East => FixedOffset::east_opt(hour_(hour)),
-    };
-
-    Ok(result.ok_or(anyhow!("Wrong offset"))?)
-}
-
 // Show the related time
-fn show_time(now: DateTime<Utc>, offset: &FixedOffset, location: &str) {
-    let time = now.with_timezone(offset);
+fn show_time(time: Zoned, location: &str) {
     println!(
         "{}",
-        format!("{}: {}", location, time.format("%I:%M %p"))
+        format!("{}: {}", location, time.strftime("%I:%M %p"))
             .bold()
             .green()
     );

Thanks for jiff, a huge chuck of code get removed. 🥞

[BurntSushi]

w00t, that is awesome!

Also, really cool that you have a friend named Aragorn. :P