implement logout command

fixes #470

src/command.rs

@@ -134,6 +134,7 @@ pub enum Command {
     Insert(Option<String>),
     NewPlaylist(String),
     Sort(SortKey, SortDirection),
+    Logout,
 }
 
 impl fmt::Display for Command {
@@ -192,6 +193,7 @@ impl fmt::Display for Command {
             Command::Insert(_) => "insert".to_string(),
             Command::NewPlaylist(name) => format!("new playlist {}", name),
             Command::Sort(key, direction) => format!("sort {} {}", key, direction),
+            Command::Logout => "logout".to_string(),
         };
         write!(f, "{}", repr)
     }
@@ -415,6 +417,7 @@ pub fn parse(input: &str) -> Option<Command> {
                 None
             }
         }
+        "logout" => Some(Command::Logout),
         "noop" => Some(Command::Noop),
         _ => None,
     }

src/commands.rs

@@ -233,6 +233,16 @@ impl CommandManager {
                 });
                 Ok(None)
             }
+            Command::Logout => {
+                self.spotify.shutdown();
+
+                let mut credentials_path = crate::config::cache_path("librespot");
+                credentials_path.push("credentials.json");
+                std::fs::remove_file(credentials_path).unwrap();
+
+                s.quit();
+                Ok(None)
+            }
             Command::Jump(_)
             | Command::Move(_, _)
             | Command::Shift(_, _)

src/spotify.rs

@@ -71,6 +71,7 @@ enum WorkerCommand {
     Seek(u32),
     SetVolume(u16),
     RequestToken(oneshot::Sender<Token>),
+    Shutdown,
 }
 
 #[derive(Clone, Debug, PartialEq)]
@@ -191,6 +192,10 @@ impl futures::Future for Worker {
                         self.token_task = Spotify::get_token(&self.session, sender);
                         progress = true;
                     }
+                    WorkerCommand::Shutdown => {
+                        self.player.stop();
+                        self.session.shutdown();
+                    }
                 }
             }
 
@@ -943,6 +948,10 @@ impl Spotify {
         self.cfg.with_state_mut(|mut s| s.volume = volume);
         self.send_worker(WorkerCommand::SetVolume(Self::log_scale(volume)));
     }
+
+    pub fn shutdown(&self) {
+        self.send_worker(WorkerCommand::Shutdown);
+    }
 }
 
 #[derive(Debug, PartialEq)]