add connect and disconnect messages

src/client.rs

@@ -90,9 +90,9 @@ struct Client {
 impl Client {
     fn handle_frame(&self, frame: Bytes) -> Result<()> {
         match rmp_serde::from_slice(&frame)? {
-            ToClient::ChatLine { id, line } => {
-                tracing::info!(?id, ?line);
-            }
+            ToClient::ChatLine { id, line } => tracing::info!(?id, ?line),
+            ToClient::ClientConnected { id } => tracing::info!(?id, "Connected"),
+            ToClient::ClientDisconnected { id } => tracing::info!(?id, "Disconnected"),
         }
         Ok(())
     }

src/messages.rs

@@ -1,8 +1,11 @@
+use crate::prelude::*;
 use serde::{Deserialize, Serialize};
 
 #[derive(Deserialize, Serialize)]
 pub(crate) enum ToClient {
-    ChatLine { id: u64, line: String },
+    ChatLine { id: Id, line: String },
+    ClientConnected { id: Id },
+    ClientDisconnected { id: Id },
 }
 
 #[derive(Deserialize, Serialize)]

src/prelude.rs

@@ -19,3 +19,5 @@ pub use tokio::{
 };
 // Don't use BytesCodec, it is _nonsense_
 pub use tokio_util::codec::{Framed, LengthDelimitedCodec};
+
+pub type Id = u64;

src/server.rs

@@ -1,7 +1,5 @@
 use crate::prelude::*;
 
-type Id = u64;
-
 pub(crate) struct Args {
     pub(crate) port: u16,
 }
@@ -59,7 +57,7 @@ impl App {
                 }
             }
 
-            // Try to read into the client's inbox
+            // Try to read data in
             match stream.as_mut().poll_next(cx) {
                 Poll::Pending => {}
                 Poll::Ready(None) => clients_to_remove.push(*id),
@@ -73,16 +71,17 @@ impl App {
 
         // Close out disconnected clients
         for id in clients_to_remove {
+            cx.waker().wake_by_ref();
             tracing::info!(?id, "Closing client");
             self.client_streams.remove(&id);
-            self.server.handle_client_disconnected(id);
+            self.server.handle_client_disconnected(id)?;
         }
 
         if let Poll::Ready(result) = self.listener.poll_accept(cx) {
             let (stream, _addr) = result.context("listener.poll_accept")?;
             cx.waker().wake_by_ref();
             let stream = Framed::new(stream, LengthDelimitedCodec::new());
-            let id = self.server.handle_new_client();
+            let id = self.server.handle_new_client()?;
             self.client_streams.insert(id, stream);
         }
 
@@ -97,8 +96,17 @@ struct Server {
 }
 
 impl Server {
-    fn handle_client_disconnected(&mut self, id: Id) {
+    fn broadcast(&mut self, msg: &ToClient) -> Result<()> {
+        for client in &mut self.clients.values_mut() {
+            client.handle_outgoing(msg)?;
+        }
+        Ok(())
+    }
+
+    fn handle_client_disconnected(&mut self, id: Id) -> Result<()> {
         self.clients.remove(&id);
+        self.broadcast(&ToClient::ClientDisconnected { id })?;
+        Ok(())
     }
 
     fn handle_client_frame(&mut self, id: Id, frame: Bytes) -> Result<()> {
@@ -112,13 +120,11 @@ impl Server {
             };
             msg
         };
-        for client in &mut self.clients.values_mut() {
-            client.handle_outgoing(&msg)?;
-        }
+        self.broadcast(&msg)?;
         Ok(())
     }
 
-    fn handle_new_client(&mut self) -> Id {
+    fn handle_new_client(&mut self) -> Result<Id> {
         let id = self.next_client_id;
         self.next_client_id += 1;
         let client = Client {
@@ -132,7 +138,8 @@ impl Server {
             "Accepted client"
         );
         self.clients.insert(id, client);
-        id
+        self.broadcast(&ToClient::ClientConnected { id })?;
+        Ok(id)
     }
 
     fn poll_send(&mut self, id: Id) -> Result<Option<Bytes>> {