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use futures::future::{join, join_all};
use quinn::{Endpoint, SendStream, VarInt};
use std::collections::HashMap;
use std::net::{IpAddr, SocketAddr};
use std::sync::Arc;
use tokio::sync::Mutex;
use tokio::task::{self, JoinHandle};
use crate::cli_utils::configure_logging;
use crate::common::connection::quic::QuicReader;
use crate::common::constants::{LOCALHOST4, LOCALHOST6};
use crate::common::ip_display::IpDisplay;
use crate::common::message::UserState;
use crate::common::result::DynResult;
use super::bot::server_run_bots;
use super::options::ServerOptions;
use super::process::process;
use super::signals::{run_and_configure_signals, SignalHandler};
use super::sockets::create_server_config;
use super::types::{Connections, Rooms};
use super::utils::send_room_update;
pub async fn main(module: &'static str, options: ServerOptions) -> DynResult<()> {
configure_logging(module)?;
let streams = Arc::new(Mutex::new(HashMap::new()));
let rooms = Arc::new(Mutex::new(HashMap::new()));
let mut local_addrs: Vec<SocketAddr> = vec![];
let mut endpoints: Vec<Arc<Endpoint>> = vec![];
let futures = super::sockets::listen(&options)
.await?
.into_iter()
.map(|endpoint| {
log::info!(
"Accepting connections on {} ({})",
endpoint
.local_addr()
.map(|addr| format!("{addr}"))
.unwrap_or_else(|err| format!("{err:?}")),
options.domain
);
if let Ok(addr) = endpoint.local_addr() {
local_addrs.push(addr);
}
let endpoint = Arc::new(endpoint);
endpoints.push(endpoint.clone());
handle_endpoint(endpoint, streams.clone(), rooms.clone())
})
.collect::<Vec<_>>();
let shutdown = run_and_configure_signals(SignalHandlerImpl {
endpoints,
options: options.clone(),
})?;
let results = if let Some(addr) = local_addrs.into_iter().next() {
let ip = match addr.ip() {
IpAddr::V4(_) => LOCALHOST4,
IpAddr::V6(_) => LOCALHOST6,
};
join(server_run_bots(ip, &options), join_all(futures))
.await
.1
} else {
join_all(futures).await
};
for result in results {
match result {
Ok(()) => (),
Err(err) => log::error!("Got error: {err:?}"),
}
}
shutdown.await?;
Ok(())
}
struct SignalHandlerImpl {
endpoints: Vec<Arc<Endpoint>>,
options: ServerOptions,
}
impl SignalHandler for SignalHandlerImpl {
// async fn shutdown(&self) {
// log::info!("Shutting down!");
// self.shutdown_event.store(true, atomic::Ordering::Relaxed);
// }
async fn reload_config(&self) {
match create_server_config(&self.options) {
Ok(server_config) => {
for endpoint in &self.endpoints {
endpoint.set_server_config(Some(server_config.clone()));
log::debug!(
"Updated server config for endpoint: {:?}",
endpoint.local_addr()
);
}
}
Err(err) => {
log::error!("Error while trying to create server config: {err:?}")
}
}
}
}
async fn handle_endpoint(
endpoint: Arc<Endpoint>,
streams: Connections<IpDisplay, SendStream>,
rooms: Rooms<IpDisplay>,
) -> DynResult<()> {
while let Some(stream) = endpoint.accept().await {
let jh: JoinHandle<()> = match stream.accept() {
Ok(stream) => {
let peer: IpDisplay = stream.remote_address().into();
match stream.await {
Ok(connection) => match connection.open_bi().await {
Ok((writer, reader)) => {
let streams = streams.clone();
let rooms = rooms.clone();
task::spawn(async move {
{
let mut guard = streams.lock().await;
(*guard).insert(peer, writer);
};
match process(
&peer,
QuicReader::from(reader),
streams.clone(),
rooms.clone(),
)
.await
{
Ok(()) => (),
Err(err) => {
connection
.close(VarInt::from_u32(0), format!("{err}").as_ref());
log::warn!("Disconnected `{peer}`: {err}")
}
};
// CLEAN UP
let mut updated_rooms = vec![];
{
let mut guard = rooms.lock().await;
let mut empty_keys = Vec::new();
for (key, value) in guard.iter_mut() {
let mut room = value.lock().await;
let removed = room.users.remove(&peer);
if room.users.is_empty() {
if Arc::strong_count(value) > 1 {
log::error!("({key}: {value:?}) value has to high strong count");
}
empty_keys.push(*key);
} else if let Some(own) = removed.as_ref() {
if let Some(round) = room.round.as_ref() {
if round.users.contains(&own.id) {
// TODO: improve! Current behaviour is weird
// user of round left -> round broken -> set state of all to InRoom
room.round = None;
for (_, user) in room.users.iter_mut() {
user.state = UserState::InRoom;
}
}
}
updated_rooms.push(*key);
}
}
for key in empty_keys {
guard.remove(&key);
}
log::debug!("ROOMS: {:?}", *guard);
};
{
let mut guard = streams.lock().await;
(*guard).remove(&peer);
log::debug!("STREAMS: {:?}", guard.keys());
};
for room_id in updated_rooms {
if let Some(room) = rooms.lock().await.get(&room_id) {
if let Err(err) =
send_room_update(room_id, room, &streams).await
{
log::warn!("Failed to send room update: {err:?}");
}
}
}
})
}
Err(err) => {
log::trace!("Failed to accept bi: {err:?}");
continue;
}
},
Err(err) => {
log::trace!("Failed to await connecting: {err:?}");
continue;
}
}
}
Err(err) => {
log::trace!("Failed to get stream: {err}");
continue;
}
};
drop(jh);
}
Ok(())
}