state: persist the queue and pick up where playback stopped

The queue, its shuffle order and whether playback was running are written to
~/.local/state/rsplayer/state.json whenever they change, and on shutdown, then
restored at daemon start. Tracks that disappeared from disk are dropped
instead of failing on play.

`rsp resume`/`rsp toggle` now start the restored track when nothing is loaded
into the engine yet, which is the state right after a restart with a queue
that was paused.

1 files changed, 3 insertions, 3 deletions

diff --git a/src/mpris.rs b/src/mpris.rs
index f156f7f..3fc706d 100644
--- a/src/mpris.rs
+++ b/src/mpris.rs
@@ -378,13 +378,13 @@ impl MprisPlayer {
     #[zbus(name = "Shuffle")]
     fn set_shuffle(&self, value: bool) {
         if let Ok(mut q) = self.queue.lock() {
-            let current = q.shuffle_mode().clone();
+            let current = *q.shuffle_mode();
             let mode = if !value {
                 ShuffleMode::None
             } else if current == ShuffleMode::None {
                 ShuffleMode::All
             } else {
-                current.clone()
+                current
             };
 
             if mode != current {
@@ -550,7 +550,7 @@ pub fn start_mpris_server(
                 let volume = poll_audio.get_volume() as f64 / 100.0;
                 let shuffle = poll_queue
                     .lock()
-                    .map(|q| q.shuffle_mode().clone())
+                    .map(|q| *q.shuffle_mode())
                     .unwrap_or(ShuffleMode::None);
                 let loop_status_value = poll_loop_status
                     .lock()