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|
use super::Config;
use crate::{game::protocol::Packet, State};
use anyhow::{anyhow, Result};
use axum::{
extract::{
self,
connect_info::ConnectInfo,
ws::{Message, WebSocket, WebSocketUpgrade},
},
http::HeaderMap,
response::{Html, IntoResponse},
routing::get,
Json, Router,
};
use headers::ContentType;
use log::{info, warn};
use std::{
cmp::Reverse,
collections::{HashMap, VecDeque},
net::SocketAddr,
str::FromStr,
sync::Arc,
};
use tokio::{
spawn,
sync::{broadcast, RwLock},
};
struct SpectateState {
past_events: RwLock<Vec<Packet>>,
win_history: RwLock<VecDeque<Option<String>>>,
events: broadcast::Sender<Packet>,
}
pub async fn spectate_server(config: Config, state: Arc<State>) -> Result<()> {
let sstate = Arc::new(SpectateState {
past_events: Default::default(),
win_history: Default::default(),
events: broadcast::channel(512).0,
});
spawn(broadcaster(sstate.clone(), state));
let app = Router::new()
.route("/", get(index))
.route("/main.js", get(javascript))
.route("/style.css", get(css))
.route("/events", get(ws_handler))
.route("/stats", get(stats))
.with_state(sstate);
let listener = tokio::net::TcpListener::bind(config.bind).await.unwrap();
info!("listening on {}", listener.local_addr()?);
axum::serve(
listener,
app.into_make_service_with_connect_info::<SocketAddr>(),
)
.await?;
Ok(())
}
#[cfg(debug_assertions)]
async fn index() -> Html<String> {
use tokio::fs::read_to_string;
Html(
read_to_string(concat!(
env!("CARGO_MANIFEST_DIR"),
"/src/spectate/index.html"
))
.await
.unwrap(),
)
}
#[cfg(not(debug_assertions))]
async fn index() -> Html<&'static str> {
Html(include_str!("index.html"))
}
#[cfg(debug_assertions)]
async fn javascript() -> (HeaderMap, String) {
use headers::HeaderMapExt;
use tokio::fs::read_to_string;
let mut hm = HeaderMap::new();
hm.typed_insert(ContentType::from_str("application/javascript").unwrap());
(
hm,
read_to_string(concat!(env!("OUT_DIR"), "/main.js"))
.await
.unwrap(),
)
}
#[cfg(not(debug_assertions))]
async fn javascript() -> (HeaderMap, &'static str) {
use headers::HeaderMapExt;
let mut hm = HeaderMap::new();
hm.typed_insert(ContentType::from_str("application/javascript").unwrap());
(hm, include_str!(concat!(env!("OUT_DIR"), "/main.js")))
}
#[cfg(debug_assertions)]
async fn css() -> (HeaderMap, String) {
use headers::HeaderMapExt;
use tokio::fs::read_to_string;
let mut hm = HeaderMap::new();
hm.typed_insert(ContentType::from_str("text/css").unwrap());
(
hm,
read_to_string(concat!(
env!("CARGO_MANIFEST_DIR"),
"/src/spectate/style.css"
))
.await
.unwrap(),
)
}
#[cfg(not(debug_assertions))]
async fn css() -> (HeaderMap, &'static str) {
use headers::HeaderMapExt;
let mut hm = HeaderMap::new();
hm.typed_insert(ContentType::from_str("text/css").unwrap());
(hm, include_str!("style.css"))
}
async fn stats(
extract::State(state): extract::State<Arc<SpectateState>>,
) -> Json<Vec<(String, usize)>> {
let stats = state.win_history.read().await.to_owned();
let mut scoreboard = HashMap::new();
for w in stats.clone() {
if let Some(w) = w {
*scoreboard.entry(w).or_default() += 1
}
}
let mut scoreboard = scoreboard.into_iter().collect::<Vec<_>>();
scoreboard.sort_by_key(|(_, s)| Reverse(*s));
Json(scoreboard)
}
async fn broadcaster(sstate: Arc<SpectateState>, state: Arc<State>) {
let mut ticks = state.tick.subscribe();
while let Ok(new_game) = ticks.recv().await {
let mut events = Vec::new();
{
let g = state.game.read().await;
events.push(Packet::Tick);
if let Some(winner) = new_game {
if let Some(winner) = winner {
let winner =
if let Some(winner) = state.players.write().await.get(&winner).cloned() {
Some(winner)
} else {
None
};
let mut h = sstate.win_history.write().await;
h.push_front(winner);
while h.len() > 64 {
h.pop_back();
}
}
events.push(Packet::Win(winner.unwrap_or(u32::MAX) as usize, 0)); // TODO packet misuse
sstate.past_events.write().await.clear();
events.push(Packet::Game {
my_id: 0,
width: g.map.size.x as usize,
height: g.map.size.y as usize,
});
for (player, (_, _, name)) in &g.heads {
events.push(Packet::Player {
id: *player,
name: name.to_owned(),
})
}
}
for (player, (_, pos, _)) in &g.heads {
events.push(Packet::Pos {
id: *player,
x: pos.x,
y: pos.y,
})
}
if !g.dead.is_empty() {
events.push(Packet::Die(g.dead.clone()));
}
}
sstate.past_events.write().await.extend(events.clone());
for ev in events {
let _ = sstate.events.send(ev);
}
}
}
async fn ws_handler(
ws: WebSocketUpgrade,
ConnectInfo(addr): ConnectInfo<SocketAddr>,
extract::State(state): extract::State<Arc<SpectateState>>,
) -> impl IntoResponse {
ws.on_upgrade(move |socket| async move {
if let Err(e) = handle_socket(socket, addr, state).await {
warn!("client error {e}")
}
})
}
async fn handle_socket(
mut socket: WebSocket,
_addr: SocketAddr,
state: Arc<SpectateState>,
) -> anyhow::Result<()> {
let past = state.past_events.read().await.clone();
for p in past {
socket
.send(Message::Text(serde_json::to_string(&p)?))
.await?;
}
let mut live = state.events.subscribe();
loop {
tokio::select! {
message = socket.recv() => {
message.ok_or(anyhow!("socket end"))??;
}
event = live.recv() => {
socket
.send(Message::Text(serde_json::to_string(&event?)?))
.await?;
}
}
}
}
|
