chore: improve readability of code relating to downloader thread

src/player.rs

@@ -221,7 +221,7 @@ impl Player {
 
                 // Notify the background downloader that there's an empty spot
                 // in the buffer.
-                itx.send(()).await?;
+                Downloader::notify(&itx).await?;
 
                 // Notify the audio server that the next song has actually been downloaded.
                 tx.send(Messages::NewSong).await?
@@ -249,11 +249,11 @@ impl Player {
         mut rx: Receiver<Messages>,
     ) -> eyre::Result<()> {
         // `itx` is used to notify the `Downloader` when it needs to download new tracks.
-        let (downloader, itx) = Downloader::new(player.clone());
-        let downloader = downloader.start().await;
+        let downloader = Downloader::new(player.clone());
+        let (itx, downloader) = downloader.start().await;
 
         // Start buffering tracks immediately.
-        itx.send(()).await?;
+        Downloader::notify(&itx).await?;
 
         // Set the initial sink volume to the one specified.
         player.sink.set_volume(properties.volume as f32 / 100.0);

src/player/downloader.rs

@@ -21,20 +21,32 @@ pub struct Downloader {
     /// The internal reciever, which is used by the downloader to know
     /// when to begin downloading more tracks.
     rx: Receiver<()>,
+
+    /// A copy of the internal sender, which can be useful for keeping
+    /// track of it.
+    tx: Sender<()>,
 }
 
 impl Downloader {
+    /// Uses a sender recieved from [Sender] to notify the
+    /// download thread that it should resume downloading.
+    pub async fn notify(sender: &Sender<()>) -> Result<(), mpsc::error::SendError<()>> {
+        sender.send(()).await
+    }
+
     /// Initializes the [Downloader].
     ///
     /// This also sends a [`Sender`] which can be used to notify
     /// when the downloader needs to begin downloading more tracks.
-    pub fn new(player: Arc<Player>) -> (Self, Sender<()>) {
+    pub fn new(player: Arc<Player>) -> Self {
         let (tx, rx) = mpsc::channel(8);
-        (Self { player, rx }, tx)
+        Self { player, rx, tx }
     }
 
     /// Actually starts & consumes the [Downloader].
-    pub async fn start(mut self) -> JoinHandle<()> {
+    pub async fn start(mut self) -> (Sender<()>, JoinHandle<()>) {
+        (
+            self.tx,
             task::spawn(async move {
                 // Loop through each update notification.
                 while self.rx.recv().await == Some(()) {
@@ -47,6 +59,7 @@ impl Downloader {
                         self.player.tracks.write().await.push_back(track);
                     }
                 }
-        })
+            }),
+        )
     }
 }

src/player/ui.rs

@@ -114,7 +114,15 @@ async fn input(sender: Sender<Messages>) -> eyre::Result<()> {
 /// has been displayed for, so that it's only displayed for a certain amount of frames.
 async fn interface(player: Arc<Player>, minimalist: bool) -> eyre::Result<()> {
     loop {
-        let action = components::action(&player, WIDTH);
+        let action = format!(
+            "{} {}",
+            components::action(&player, WIDTH - 2),
+            player
+                .tracks
+                .try_read()
+                .and_then(|x| Ok(x.len().to_string()))
+                .unwrap_or(String::from("?"))
+        );
 
         let timer = VOLUME_TIMER.load(Ordering::Relaxed);
         let volume = player.sink.volume();