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|
use crate::AppState;
use crate::session::{HandObject, PlayUpdate, Session};
use axum::extract::ws::{Message, Utf8Bytes, WebSocket};
use futures_util::{SinkExt, StreamExt};
use serde::{Deserialize, Serialize};
use std::sync::{Arc, Mutex, RwLock, Weak};
use tokio::sync::broadcast::Receiver;
use tokio::sync::broadcast::error::RecvError;
use tokio::sync::mpsc;
use tokio::sync::mpsc::Sender;
#[derive(Deserialize)]
enum IncomingPlayMessage {
Initialize { id: String },
Color(String),
}
// TODO: Maybe derive Clone, reference interior vals
#[derive(Serialize)]
enum OutgoingPlayMessage {
Initialize { colors: Vec<String> },
Hand(Vec<HandObject>),
// TODO: include error details
Error,
}
pub async fn handle_play(socket: WebSocket, app_state: Arc<AppState>) {
let (mut sender, mut receiver) = socket.split();
let (sender_tx, mut sender_rx) = mpsc::channel(2);
let mut send_task = tokio::spawn(async move {
while let Some(message) = sender_rx.recv().await {
let serialized = match serde_json::to_string(&message) {
Ok(serialized) => serialized,
Err(err) => {
eprintln!("Failed to serialize outgoing websocket message: {}", err);
break;
}
};
if let Err(err) = sender
.send(Message::Text(Utf8Bytes::from(serialized)))
.await
{
eprintln!("Failed to send serialized websocket message: {}", err);
break;
}
}
});
let mut recv_task = {
let sender_tx = sender_tx.clone();
tokio::spawn(async move {
let mut player_session = None;
let player_color = Arc::new(RwLock::new(String::new()));
while let Some(msg) = receiver.next().await {
let Ok(Message::Text(text)) = msg else {
continue;
};
match serde_json::from_str(text.as_str()) {
Ok(IncomingPlayMessage::Initialize { id }) => {
let session = {
let sessions = app_state.sessions.read().unwrap();
sessions
.get(&id)
.map(Arc::to_owned)
.ok_or("Session did not exist")
};
match session {
Ok(session) => {
let (colors, update_rx) = {
let session = session.lock().unwrap();
let colors: Vec<String> =
session.seats.keys().cloned().collect();
let update_rx = session.update_tx.subscribe();
(colors, update_rx)
};
player_session = Some(Arc::downgrade(&session));
{
let sender_tx = sender_tx.clone();
let player_session = Arc::downgrade(&session);
let player_color = player_color.clone();
tokio::spawn(async move {
handle_update(
update_rx,
sender_tx,
player_session,
player_color,
)
.await
});
}
let response = OutgoingPlayMessage::Initialize { colors };
if sender_tx.send(response).await.is_err() {
break;
}
}
Err(err) => {
eprintln!("Failed to access session: {}", err);
let response = OutgoingPlayMessage::Error;
if sender_tx.send(response).await.is_err() {
break;
}
}
}
}
Ok(IncomingPlayMessage::Color(color)) => {
let Some(session) =
player_session.clone().and_then(|session| session.upgrade())
else {
let response = OutgoingPlayMessage::Error;
if sender_tx.send(response).await.is_err() {
break;
}
break;
};
let hand = session
.lock()
.unwrap()
.seats
.get(&color)
.map(|seat| seat.hand.to_owned());
match hand {
Some(hand) => {
*player_color.write().unwrap() = color;
if sender_tx
.send(OutgoingPlayMessage::Hand(hand))
.await
.is_err()
{
break;
}
}
None => {
if sender_tx.send(OutgoingPlayMessage::Error).await.is_err() {
break;
}
}
};
}
Err(err) => {
eprintln!(
"Encountered an error while handling a message from a player: {}",
err
);
break;
}
}
}
})
};
tokio::select! {
_ = &mut send_task => recv_task.abort(),
_ = &mut recv_task => send_task.abort(),
}
}
async fn handle_update(
mut update_rx: Receiver<PlayUpdate>,
sender_tx: Sender<OutgoingPlayMessage>,
_player_session: Weak<Mutex<Session>>,
player_color: Arc<RwLock<String>>,
) {
loop {
match update_rx.recv().await {
Ok(PlayUpdate::HandUpdate(color, hand)) => {
if *player_color.read().unwrap() == color {
let _ = sender_tx.send(OutgoingPlayMessage::Hand(hand)).await;
}
}
Err(RecvError::Closed) => break,
Err(RecvError::Lagged(_)) => continue,
}
}
}
|
