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/*
Undercooked - a game about cooking
Copyright 2024 metamuffin
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU Affero General Public License as published by
the Free Software Foundation, version 3 of the License only.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU Affero General Public License for more details.
You should have received a copy of the GNU Affero General Public License
along with this program. If not, see <https://www.gnu.org/licenses/>.
*/
use anyhow::Result;
use futures_util::{SinkExt, StreamExt};
use log::{debug, info, warn};
use std::{env::args, process::exit, sync::Arc, time::Duration};
use tokio::{
net::TcpListener,
spawn,
sync::{broadcast, mpsc::channel, RwLock},
time::interval,
};
use tokio_tungstenite::tungstenite::Message;
use undercooked::{
protocol::{PacketC, PacketS, PlayerID},
state::State,
};
#[tokio::main]
async fn main() -> Result<()> {
env_logger::init_from_env("LOG");
if let Some(arg) = args().nth(1) {
match arg.as_str() {
"version" => println!("{}", env!("CARGO_PKG_VERSION")),
_ => panic!("unknown subcommand"),
}
exit(0);
}
let ws_listener = TcpListener::bind("0.0.0.0:27032").await?;
info!("listening for websockets on {}", ws_listener.local_addr()?);
let (tx, rx) = broadcast::channel::<PacketC>(1024);
let state = Arc::new(RwLock::new(State::new(tx)?));
{
let state = state.clone();
spawn(async move {
let dt = 1. / 25.;
let mut tick = interval(Duration::from_secs_f32(dt));
loop {
tick.tick().await;
state.write().await.tick(dt).await;
}
});
}
for id in (1..).map(PlayerID) {
let (sock, addr) = ws_listener.accept().await?;
let Ok(sock) = tokio_tungstenite::accept_async(sock).await else {
warn!("invalid ws handshake");
continue;
};
let (mut write, mut read) = sock.split();
let state = state.clone();
let mut rx = rx.resubscribe();
let (error_tx, mut error_rx) = channel::<PacketC>(8);
info!("{addr} connected via ws");
let mut init = state.write().await.game.prime_client();
init.insert(0, PacketC::Init { id });
spawn(async move {
for p in init {
if let Err(e) = write
.send(tokio_tungstenite::tungstenite::Message::Text(
serde_json::to_string(&p).unwrap(),
))
.await
{
warn!("ws error on init: {e}");
return;
}
}
loop {
let Some(packet) = tokio::select!(
p = rx.recv() => p.ok(),
p = error_rx.recv() => p,
) else {
break;
};
if let Err(e) = write
.send(tokio_tungstenite::tungstenite::Message::Text(
serde_json::to_string(&packet).unwrap(),
))
.await
{
warn!("ws error: {e}");
break;
}
}
});
spawn(async move {
info!("{id:?} joined");
while let Some(Ok(message)) = read.next().await {
match message {
Message::Text(line) => {
let Ok(packet): Result<PacketS, _> = serde_json::from_str(&line) else {
warn!("invalid json over ws");
break;
};
debug!("<- {id:?} {packet:?}");
if let Err(e) = state.write().await.packet_in(id, packet).await {
warn!("client error: {e}");
let _ = error_tx
.send(PacketC::Error {
message: format!("{e}"),
})
.await;
}
}
Message::Close(_) => break,
_ => (),
}
}
info!("{id:?} left");
state.write().await.packet_in(id, PacketS::Leave).await.ok();
});
}
Ok(())
}
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