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path: root/server/src/main.rs
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use anyhow::Result;
use futures_util::{SinkExt, StreamExt};
use log::{debug, info};
use std::{sync::Arc, time::Duration};
use tokio::{
    io::{AsyncBufReadExt, AsyncWriteExt, BufReader},
    net::TcpListener,
    spawn,
    sync::{broadcast, RwLock},
    time::sleep,
};
use tokio_tungstenite::tungstenite::Message;
use undercooked::{
    game::Game,
    protocol::{PacketC, PacketS},
};

#[tokio::main]
async fn main() -> Result<()> {
    env_logger::init_from_env("LOG");
    let raw_listener = TcpListener::bind("0.0.0.0:27031").await?;
    let ws_listener = TcpListener::bind("0.0.0.0:27032").await?;
    info!(
        "listening for line-based tcp on {}",
        raw_listener.local_addr()?
    );
    info!("listening for websockets on {}", ws_listener.local_addr()?);

    let game = Arc::new(RwLock::new(Game::new()));
    let (tx, rx) = broadcast::channel::<PacketC>(1024);

    {
        let game = game.clone();
        spawn(async move {
            {
                let mut g = game.write().await;
                while let Some(p) = g.packet_out() {
                    debug!("-> {p:?}");
                    let _ = tx.send(p);
                }
            }
            sleep(Duration::from_millis(10)).await;
        });
    }

    for id in 0.. {
        tokio::select! {
            r = raw_listener.accept() => {
                let (sock, addr) = r?;
                let (read, mut write) = sock.into_split();
                let game = game.clone();
                let mut rx = rx.resubscribe();
                info!("{addr} connected");
                spawn(async move {
                    while let Ok(packet) = rx.recv().await {
                        write
                            .write_all(serde_json::to_string(&packet).unwrap().as_bytes())
                            .await
                            .unwrap();
                        write.write_all(b"\n").await.unwrap();
                    }
                });
                spawn(async move {
                    let mut read = BufReader::new(read).lines();
                    while let Ok(Some(line)) = read.next_line().await {
                        let packet: PacketS = serde_json::from_str(&line).unwrap();
                        debug!("<- {id} {packet:?}");
                        game.write().await.packet_in(id, packet).unwrap();
                    }
                });
            }
            r = ws_listener.accept() => {
                // let (sock, addr) = ws_listener.accept().await?;
                let (sock, addr) = r?;
                let sock = tokio_tungstenite::accept_async(sock).await?;
                let (mut write, mut read) = sock.split();
                let game = game.clone();
                let mut rx = rx.resubscribe();
                info!("{addr} connected via ws");
                spawn(async move {
                    while let Ok(packet) = rx.recv().await {
                        write
                            .send(tokio_tungstenite::tungstenite::Message::Text(
                                serde_json::to_string(&packet).unwrap(),
                            ))
                            .await
                            .unwrap();
                    }
                });
                spawn(async move {
                    while let Some(Ok(Message::Text(message))) = read.next().await {
                        let packet: PacketS = serde_json::from_str(&message).unwrap();
                        debug!("<- {id} {packet:?}");
                        game.write().await.packet_in(id, packet).unwrap();
                    }
                });
            }
        }
    }

    Ok(())
}