add interactive chatting with stdin

src/client.rs

@@ -35,6 +35,10 @@ impl App {
         })
     }
 
+    pub(crate) fn handle_stdin(&mut self, line: String) -> Result<()> {
+        self.client.handle_stdin(line)
+    }
+
     pub(crate) fn poll_run(&mut self, cx: &mut Context<'_>) -> Poll<Result<()>> {
         match self.step(cx) {
             Ok(()) => Poll::Pending,
@@ -126,14 +130,22 @@ impl Client {
         self.enqueue(&ToServer::SetName { name })
     }
 
+    pub(crate) fn handle_stdin(&mut self, line: String) -> Result<()> {
+        let msg = ToServer::ChatLine {
+            line,
+            sequence: self.sequence,
+        };
+        self.sequence += 1;
+        self.enqueue(&msg)
+    }
+
     fn handle_timeout(&mut self) -> Result<()> {
         let msg = ToServer::ChatLine {
             line: "There was a time, in the era of great chaos, when the Earth and the Moon were at war with each other. A daredevil from the Moon piloted a bizarre aircraft. It was feared, and because of its shape, called EINHANDER.".to_string(),
             sequence: self.sequence,
         };
         self.sequence += 1;
-        self.enqueue(&msg)?;
-        Ok(())
+        self.enqueue(&msg)
     }
 
     fn poll_send(&mut self) -> Option<Bytes> {

src/main.rs

@@ -71,6 +71,12 @@ async fn main() -> Result<()> {
 
 async fn run_client(args: client::Args) -> Result<()> {
     let mut ctrl_c = signal(SignalKind::interrupt())?;
+    let (stdin_tx, mut stdin_rx) = tokio::sync::mpsc::channel(1);
+    std::thread::spawn(move || {
+        for line in std::io::stdin().lines() {
+            stdin_tx.blocking_send(line).unwrap();
+        }
+    });
     let mut app = client::App::new(args).await?;
     loop {
         let ctl = poll_fn(|cx| {
@@ -80,6 +86,24 @@ async fn run_client(args: client::Args) -> Result<()> {
                 return Poll::Ready(ControlFlow::Break(Ok(())));
             }
 
+            match stdin_rx.poll_recv(cx) {
+                Poll::Pending => {}
+                Poll::Ready(None) => {
+                    return Poll::Ready(ControlFlow::Break(Err(anyhow!(
+                        "Stdin thread somehow died"
+                    ))));
+                }
+                Poll::Ready(Some(line)) => {
+                    let line = line.unwrap();
+                    cx.waker().wake_by_ref();
+                    if let Err(err) = app.handle_stdin(line) {
+                        return Poll::Ready(ControlFlow::Break(
+                            Err(err).context("app.handle_stdin"),
+                        ));
+                    }
+                }
+            }
+
             match app.poll_run(cx) {
                 Poll::Pending => Poll::Pending,
                 Poll::Ready(Ok(())) => Poll::Ready(ControlFlow::Continue(())),

src/prelude.rs

@@ -1,5 +1,5 @@
 pub(crate) use crate::messages::{ToClient, ToClientEvent, ToServer};
-pub use anyhow::{Context as _, Result, bail};
+pub use anyhow::{Context as _, Result, anyhow, bail};
 pub use bytes::Bytes;
 pub use futures_core::stream::Stream;
 pub use futures_sink::Sink;