print less formatting errors in timesHEADmain

these used to go wrong in case there was no real-time info on departure
times. Instead traveltext now falls back on scheduled departure times if
no real-time info is available.

These still fail sometimes (at exit-only stops both appear to be unset
on the oebb hafas), but it's a lot better than what was before.

Also I've observed travelynx returning actual null values for missing
time stamps now, so the old hack of checking if timestamp = unix epoch
and considering that "unknown" might no longer be necessary, but I'm
keeping it around just in case.

1 files changed, 18 insertions, 8 deletions

diff --git a/src/traits.rs b/src/traits.rs
index b4b74e7..b5785be 100644
--- a/src/traits.rs
+++ b/src/traits.rs
@@ -9,19 +9,29 @@ pub trait IsStation {
   fn ds100(&self) -> Option<&str>;
 
   fn to_fancy_string(&self) -> String {
-    // travelynx literally sends this entire precise date in case of an
-    // unknown time instead of, like, a null
+    // travelynx used to send this entire precise date in case of an
+    // unknown time instead of null. I'm not sure it still does this
+    // (i have since seen it return null) but keeping this here just
+    // in case
     let epoch = "1970-01-01T00:00:00Z".parse::<DateTime<Local>>().unwrap();
+
+    let format_time = |time: &DateTime<Utc>| -> String {
+        if time.eq(&epoch) {
+          "??:??:?? ".to_owned()
+        } else { // chrono's API for timezones is expressive, but reads like c++ …
+          <DateTime<Local>>::from(*time).time().format("%T").to_string()
+        }
+    };
+
     format!(
       "{} {} – {} ({})",
       self
         .real_arrival()
-        .map(|t| if t.eq(&epoch) {
-          "unknown ".to_owned()
-        } else { // chrono's API for timezones is expressive, but reads like c++ …
-          <DateTime<Local>>::from(*t).time().format("%T").to_string()
-        })
-        .unwrap_or("<format error>".to_string())
+        .map(format_time)
+        .unwrap_or_else(||
+          self.scheduled_arrival()
+            .map(format_time).unwrap_or_else(|| "??:??:??".to_string())
+        )
         .blue(),
       {
         let delay = match (self.real_arrival(), self.scheduled_arrival()) {