Create a script for quickly calculating how long I've been working

src/main.rs

@@ -0,0 +1,35 @@
+use std::io::{stdin, Read};
+use chrono::{NaiveTime, Duration};
+
+fn read_times() -> Vec<String> {
+    println!("Write all times separated by newlines and finish with CTRL+D\n");
+    let mut times = String::new();
+    stdin().read_to_string(&mut times).expect("An error occurred reading a line");
+    times.split("\n")
+         .map(|s| { s.trim().to_string() })
+         .collect()
+}
+
+fn parse_time(time_str: &str) -> NaiveTime {
+    NaiveTime::parse_from_str(time_str, "%H:%M")
+        .expect(&format!("Failed to parse time from {time_str}"))
+}
+
+fn main() {
+    let times = read_times();
+    let mut durations = vec![];
+    for i in (0..times.len() - 1).step_by(2) {
+        let first = parse_time(times.get(i).unwrap());
+        let mut second = parse_time(times.get(i + 1).unwrap());
+        if second < first {
+            second = second + Duration::hours(12);
+        }
+        durations.push(second - first);
+    }
+
+    let total_minutes: i64  = durations.iter().map(|d| { d.num_minutes() }).sum();
+    let minutes = total_minutes % 60;
+    let hours = total_minutes / 60;
+
+    println!("You have been working for {hours} hour(s) and {minutes} minute(s)");
+}