Added duration calculation. Should be in main loop though.

src/main.rs

@@ -5,9 +5,10 @@ extern crate xml;
 use chrono::DateTime;
 use chrono::TimeZone;
 use chrono::Utc;
+use chrono::Duration;
 use std::fs::File;
 use std::io::BufReader;
-use std::time::Duration;
+use std::time::Duration as stdDuration;
 
 use xml::reader::{EventReader, XmlEvent};
 
@@ -38,6 +39,21 @@ impl Track {
         }
         sum
     }
+
+    fn time(&self) -> chrono::Duration {
+        // let timespan = &self.points[0].time.signed_duration_since(self.points[1].time);
+        let mut sum = Duration::from_std(stdDuration::new(0,0)).unwrap();
+        let mut prev_time = &self.points[0].time;
+
+        for pt in &self.points {
+            let timespan = prev_time.signed_duration_since(pt.time);
+            sum = sum.checked_sub(&timespan).unwrap();
+            prev_time = &pt.time;
+
+        }
+        sum
+
+    }
 }
 
 fn dist(p1: &Point, p2: &Point) -> f64 {
@@ -142,6 +158,7 @@ fn main() {
     // trk.points = Vec::new();
     // trk.points = points;
     println!("{:?}", trk.len());
+    println!("{:?}", trk.time());