smokestack/main: format time

smokestack/src/main.rs

@@ -80,8 +80,15 @@ fn language_colour(language: &str) -> Colour {
 }
 
 fn format_message(post: Post) -> Option<String> {
+    let time_str;
+    let time = if let Some(time) = post.timestamp() {
+        time_str = format!("{}", time.format("%H:%M:%S"));
+        &time_str
+    } else {
+        &post.created_at
+    };
+
     let language = &post.language?;
-    let time = &post.created_at;
     let display_name = &post.account.display_name;
     let username = &post.account.username;
     let host = post.account.host()?;