Returning the result of the command.

src/mpvctl/command.rs

@@ -15,6 +15,10 @@ impl Command {
             asynchronous: false,
         }
     }
+
+    pub fn get_request_id(&self) -> &Option<u64> {
+        return &self.request_id;
+    }
 }
 
 impl Serialize for Command {

src/mpvctl/mpvctl.rs

@@ -18,6 +18,7 @@ type CommandDb = Arc<Mutex<HashMap<u64, oneshot::Sender<serde_json::Value>>>>;
 pub struct MpvCtl {
     socket: OwnedWriteHalf,
     next_request_id: u64,
+    in_flight_requests: CommandDb,
 }
 
 impl MpvCtl {
@@ -28,6 +29,7 @@ impl MpvCtl {
         let (socket_read, socket_write) = socket.into_split();
         let mut framed_read = MpvFramed::new(socket_read);
         let db: CommandDb = Arc::new(Mutex::new(HashMap::new()));
+        let read_db_handle = db.clone();
 
         tokio::spawn(async move {
             loop {
@@ -54,7 +56,7 @@ impl MpvCtl {
                         };
 
                         {
-                            let mut db_handle = db.lock().unwrap();
+                            let mut db_handle = read_db_handle.lock().unwrap();
                             if let Entry::Occupied(o) = (*db_handle).entry(reqid) {
                                 o.remove()
                                     .send(frame)
@@ -77,6 +79,7 @@ impl MpvCtl {
         Ok(MpvCtl {
             socket: socket_write,
             next_request_id: 0,
+            in_flight_requests: db,
         })
     }
 
@@ -86,14 +89,26 @@ impl MpvCtl {
         ret
     }
 
-    async fn send_command(&mut self, cmd: Command) -> Result<(), Box<dyn std::error::Error>> {
+    async fn send_command(
+        &mut self,
+        cmd: Command,
+    ) -> Result<oneshot::Receiver<serde_json::Value>, Box<dyn std::error::Error>> {
         let serialized = serde_json::to_string(&cmd)?;
         println!("Sending {}", serialized);
         let (response_tx, response_rx) = oneshot::channel::<serde_json::Value>();
-        // TODO: store one stream where the reading thread can get it? Then wait for response on this end and return it from this function.
+        match cmd.get_request_id() {
+            Some(reqid) => {
+                self.in_flight_requests
+                    .lock()
+                    .unwrap()
+                    .insert(*reqid, response_tx);
+            }
+            None => (),
+        };
 
         self.socket.write_all(serialized.as_bytes()).await?;
-        Ok(())
+
+        Ok(response_rx)
     }
 
     pub async fn get_client_name(&mut self) -> Result<(), Box<dyn std::error::Error>> {