show login network errors through ui

src/client/mod.rs

@@ -21,6 +21,7 @@ pub use app::AppHandle;
 pub enum ClientEvent {
     Connect { send: NetSender, username: String },
     ServerMsg(ServerMsg),
+    Err(String),
 }
 
 pub struct Client {
@@ -34,6 +35,7 @@ pub struct Client {
     dir: DataDir,
     data: ClientData,
     handle: AppHandle,
+    error: Option<WidgetId<WidgetPtr>>,
 }
 
 impl Client {
@@ -52,6 +54,7 @@ impl Client {
             focus: None,
             username: "<unknown>".to_string(),
             clipboard: Clipboard::new().unwrap(),
+            error: None,
         };
         ui::init(&mut s);
         s
@@ -80,6 +83,11 @@ impl Client {
                     }
                 }
             },
+            ClientEvent::Err(msg) => {
+                if let Some(err) = &self.error {
+                    self.ui[err].inner = Some(ui::error(&mut self.ui, &msg));
+                }
+            }
         }
     }
 

src/client/ui.rs

@@ -27,7 +27,7 @@ pub fn init(client: &mut Client) {
     login_screen(client).set_root(&mut client.ui);
 }
 
-pub fn main_view(client: &mut Client, network: NetSender) -> WidgetId<AnyWidget> {
+pub fn main_view(client: &mut Client, network: NetSender) -> WidgetId {
     let msg_panel = msg_panel(client, network);
     let side_bar = rect(Color::BLACK.brighter(0.05)).width(80);
 
@@ -37,9 +37,22 @@ pub fn main_view(client: &mut Client, network: NetSender) -> WidgetId<AnyWidget>
         .any()
 }
 
-fn login_screen(client: &mut Client) -> WidgetId<AnyWidget> {
+pub fn error(ui: &mut Ui, msg: &str) -> WidgetId {
+    text(msg)
+        .size(20)
+        .color(Color::RED.brighter(0.3))
+        .pad(10)
+        .add(ui)
+        .any()
+}
+
+fn login_screen(client: &mut Client) -> WidgetId {
     let Client {
-        ui, handle, data, ..
+        ui,
+        handle,
+        data,
+        error,
+        ..
     } = client;
 
     let mut field = |name| text(name).editable().size(20).add(ui);
@@ -69,7 +82,7 @@ fn login_screen(client: &mut Client) -> WidgetId<AnyWidget> {
             connect(handle.clone(), ConnectInfo { ip, username });
         })
         .height(40);
-    (
+    let modal = (
         text("login").size(30),
         fbx(ip
             .id_on(Edited, |id, client: &mut Client, _| {
@@ -89,9 +102,12 @@ fn login_screen(client: &mut Client) -> WidgetId<AnyWidget> {
         .pad(15)
         .background(rect(Color::BLACK.brighter(0.2)).radius(15))
         .width(400)
-        .align(Align::Center)
-        .add(ui)
-        .any()
+        .align(Align::Center);
+
+    let err = WidgetPtr::default().add(ui);
+    client.error = Some(err.clone());
+
+    (modal, err.align(Align::Top)).stack().add(ui).any()
 }
 
 pub fn msg_widget(msg: Msg) -> impl WidgetLike<FnTag> {

src/net/client.rs

@@ -6,10 +6,14 @@ use crate::{
         transfer::{RecvHandler, recv_uni, send_uni},
     },
 };
-use quinn::{ClientConfig, Connection, Endpoint, crypto::rustls::QuicClientConfig};
+use quinn::{
+    ClientConfig, Connection, Endpoint, IdleTimeout, TransportConfig,
+    crypto::rustls::QuicClientConfig,
+};
 use std::{
     net::{Ipv6Addr, SocketAddr, SocketAddrV6, ToSocketAddrs},
     sync::Arc,
+    time::Duration,
 };
 use tokio::sync::mpsc::UnboundedSender;
 
@@ -22,11 +26,15 @@ pub struct ConnectInfo {
 }
 
 pub fn connect(handle: AppHandle, info: ConnectInfo) {
-    std::thread::spawn(|| {
-        connect_the(handle, info).unwrap();
+    std::thread::spawn(move || {
+        if let Err(msg) = connect_the(handle.clone(), info) {
+            handle.send(ClientEvent::Err(msg));
+        }
     });
 }
 
+type NetResult<T> = Result<T, String>;
+
 type MsgPayload = ClientMsg;
 pub struct NetSender {
     send: UnboundedSender<MsgPayload>,
@@ -34,7 +42,7 @@ pub struct NetSender {
 
 impl NetSender {
     pub fn send(&self, msg: ClientMsg) {
-        self.send.send(msg).unwrap();
+        let _ = self.send.send(msg);
     }
 }
 
@@ -64,35 +72,50 @@ impl NetSender {
 //         .map_err(|e| anyhow::anyhow!("failed to connect: {}", e))
 // }
 
-async fn connection_no_cert(addr: SocketAddr) -> anyhow::Result<Connection> {
-    let mut endpoint = Endpoint::client(CLIENT_SOCKET)?;
+async fn connection_no_cert(addr: SocketAddr) -> NetResult<Connection> {
+    let mut endpoint = Endpoint::client(CLIENT_SOCKET).map_err(|e| e.to_string())?;
 
-    endpoint.set_default_client_config(ClientConfig::new(Arc::new(QuicClientConfig::try_from(
+    let quic = QuicClientConfig::try_from(
         quinn::rustls::ClientConfig::builder()
             .dangerous()
             .with_custom_certificate_verifier(SkipServerVerification::new())
             .with_no_client_auth(),
-    )?)));
+    )
+    .map_err(|e| e.to_string())?;
+
+    let mut transport = TransportConfig::default();
+    transport.max_idle_timeout(Some(IdleTimeout::try_from(Duration::from_secs(5)).unwrap()));
+
+    let mut config = ClientConfig::new(Arc::new(quic));
+    config.transport_config(transport.into());
+
+    endpoint.set_default_client_config(config);
 
     // connect to server
     endpoint
         .connect(addr, SERVER_NAME)
-        .unwrap()
+        .map_err(|e| e.to_string())?
         .await
-        .map_err(|e| anyhow::anyhow!("failed to connect: {e}"))
+        .map_err(|e| e.to_string())
 }
 
 #[tokio::main]
-async fn connect_the(handle: AppHandle, info: ConnectInfo) -> anyhow::Result<()> {
+async fn connect_the(handle: AppHandle, info: ConnectInfo) -> NetResult<()> {
     let (send, mut ui_recv) = tokio::sync::mpsc::unbounded_channel::<MsgPayload>();
 
+    let addr = info
+        .ip
+        .to_socket_addrs()
+        .map_err(|e| e.to_string())?
+        .next()
+        .ok_or("no addresses found".to_string())?;
+    let conn = connection_no_cert(addr).await?;
+    let conn_ = conn.clone();
+
     handle.send(ClientEvent::Connect {
         username: info.username,
         send: NetSender { send },
     });
-    let addr = info.ip.to_socket_addrs().unwrap().next().unwrap();
-    let conn = connection_no_cert(addr).await?;
-    let conn_ = conn.clone();
 
     let recv = ServerRecv { handle };
     tokio::spawn(recv_uni(conn_, recv));