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/*
Hurry Curry! - 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::anyhow;
use clap::Parser;
use futures_util::{SinkExt, StreamExt};
use hurrycurry_protocol::{PacketC, PacketS};
use log::{debug, info, warn, LevelFilter};
use serde::{Deserialize, Serialize};
use std::{path::PathBuf, time::Instant};
use tokio::{
fs::File,
io::{AsyncBufReadExt, AsyncWriteExt, BufReader, BufWriter},
net::TcpListener,
};
use tokio_tungstenite::tungstenite::Message;
#[derive(Parser)]
enum Args {
Record { url: String, output: PathBuf },
Replay { input: PathBuf },
}
#[derive(Serialize, Deserialize)]
struct Event {
ts: f64,
packet: PacketC,
}
#[tokio::main]
async fn main() -> anyhow::Result<()> {
env_logger::builder()
.filter_level(LevelFilter::Info)
.parse_env("LOG")
.init();
let args = Args::parse();
match args {
Args::Record { url, output } => {
let mut file = BufWriter::new(File::create(&output).await?);
info!("connecting to {url:?}...");
let (mut sock, _) = tokio_tungstenite::connect_async(url).await?;
info!("starting recording.");
let start = Instant::now();
while let Some(Ok(message)) = sock.next().await {
match message {
Message::Text(line) => {
let packet: PacketC = match serde_json::from_str(&line) {
Ok(p) => p,
Err(e) => {
warn!("invalid packet: {e}");
break;
}
};
debug!("<- {packet:?}");
file.write_all(
format!(
"{}\n",
serde_json::to_string(&Event {
ts: start.elapsed().as_secs_f64(),
packet: packet
})
.unwrap()
)
.as_bytes(),
)
.await?
}
Message::Close(_) => break,
_ => (),
}
}
}
Args::Replay { input } => {
let ws_listener = TcpListener::bind("0.0.0.0:27032").await?;
info!("listening for websockets on {}", ws_listener.local_addr()?);
loop {
let mut file = BufReader::new(File::open(&input).await?).lines();
let mut next_event =
serde_json::from_str::<Event>(&file.next_line().await?.ok_or(anyhow!("eof"))?)?;
let mut time = 0.;
info!("ready");
let (sock, addr) = ws_listener.accept().await?;
let Ok(mut sock) = tokio_tungstenite::accept_async(sock).await else {
warn!("invalid ws handshake");
continue;
};
info!("{addr} connected via ws");
sock.send(tokio_tungstenite::tungstenite::Message::Text(
serde_json::to_string(&PacketC::ReplayStart).unwrap(),
))
.await?;
'outer: while let Some(Ok(message)) = sock.next().await {
match message {
Message::Text(line) => {
let packet: PacketS = match serde_json::from_str(&line) {
Ok(p) => p,
Err(e) => {
warn!("invalid packet: {e}");
break;
}
};
debug!("<- {packet:?}");
match packet {
PacketS::Join { .. } => {
sock.send(tokio_tungstenite::tungstenite::Message::Text(
serde_json::to_string(&PacketC::ServerMessage {
text: "Replays cannot be joined".to_string(),
})
.unwrap(),
))
.await?;
}
PacketS::ReplayTick { dt } => {
time += dt;
while next_event.ts < time {
debug!("<- {:?}", next_event.packet);
sock.send(tokio_tungstenite::tungstenite::Message::Text(
serde_json::to_string(&next_event.packet).unwrap(),
))
.await?;
let Some(next) = &file.next_line().await? else {
info!("reached end");
break 'outer;
};
next_event = serde_json::from_str::<Event>(next)?;
}
}
x => warn!("unhandled client packet: {x:?}"),
}
}
Message::Close(_) => break,
_ => (),
}
}
info!("{addr} left");
}
}
}
Ok(())
}
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