refactor: pass globally mutable config reference

Before, copies of the configuration were passed over. This change also
causes configuration reloads to affect the entire application and is
easier to maintain but introduces some RwLock overhead.

src/queue.rs

@@ -7,6 +7,7 @@ use notify_rust::Notification;
 use rand::prelude::*;
 use strum_macros::Display;
 
+use crate::config::Config;
 use crate::playable::Playable;
 use crate::spotify::Spotify;
 
@@ -23,16 +24,18 @@ pub struct Queue {
     current_track: RwLock<Option<usize>>,
     repeat: RwLock<RepeatSetting>,
     spotify: Arc<Spotify>,
+    cfg: Arc<Config>,
 }
 
 impl Queue {
-    pub fn new(spotify: Arc<Spotify>) -> Queue {
+    pub fn new(spotify: Arc<Spotify>, cfg: Arc<Config>) -> Queue {
         let q = Queue {
             queue: Arc::new(RwLock::new(Vec::new())),
             spotify,
             current_track: RwLock::new(None),
             repeat: RwLock::new(RepeatSetting::None),
             random_order: RwLock::new(None),
+            cfg,
         };
         q.set_repeat(q.spotify.repeat);
         q.set_shuffle(q.spotify.shuffle);
@@ -248,7 +251,7 @@ impl Queue {
             let mut current = self.current_track.write().unwrap();
             current.replace(index);
             self.spotify.update_track();
-            if self.spotify.cfg.notify.unwrap_or(false) {
+            if self.cfg.values().notify.unwrap_or(false) {
                 #[cfg(feature = "notify")]
                 if let Err(e) = Notification::new().summary(&track.to_string()).show() {
                     error!("error showing notification: {:?}", e);