Check if audio is busy in separate function

src/main.rs

@@ -64,15 +64,10 @@ async fn main() {
         }),
 
         rx.filter_map(|()| async {
-          AUDIO_CHILD.with(|cell| {
-            if let Some(ref mut audio_child) = *cell.borrow_mut() {
-              if let Ok(None) = audio_child.try_wait() {
-                debug!("doorbell still ringing, ignoring press");
-                return None;
-              }
-            }
-            Some(())
-          })?;
+          if audio_busy() {
+            debug!("doorbell still ringing, ignoring press");
+            return None;
+          }
           debug!("Playing doorbell chime");
           match process::Command::new("mplayer")
                                  .arg("static/outdoor.mp3")
@@ -92,3 +87,14 @@ async fn main() {
   let routes = root.or(events);
   warp::serve(routes).run(([0, 0, 0, 0], 8060)).await;
 }
+
+fn audio_busy() -> bool {
+  AUDIO_CHILD.with(|cell| {
+    if let Some(ref mut audio_child) = *cell.borrow_mut() {
+      if let Ok(None) = audio_child.try_wait() {
+        return true;
+      }
+    }
+    false
+  })
+}