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use crate::api::{load_player_data_from_api, save_player_data_to_api};
use crate::entity::{get_entity_id, Entity, EntityHandler};
use crate::manager::{
AttachedModule, ClientHandlerMessage, ClientManager, ModuleTemplate, PhysicsData, Player,
};
use crate::{recv, send, SCALE};
use async_std::net::TcpStream;
use async_std::{channel::Receiver, sync::RwLock};
use async_tungstenite::WebSocketStream;
use futures::stream::{SplitSink, SplitStream};
use futures::{FutureExt, SinkExt, StreamExt};
use log::{debug, error, info, warn};
use nalgebra::{point, vector};
use rand::Rng;
use rapier2d_f64::prelude::{
Collider, ColliderBuilder, MassProperties, RigidBodyBuilder, RigidBodyType,
};
use starkingdoms_protocol::goodbye_reason::GoodbyeReason;
use starkingdoms_protocol::message_s2c::{
MessageS2CChat, MessageS2CGoodbye, MessageS2CHello, MessageS2CModulesUpdate,
MessageS2CPlanetData, MessageS2CPlayersUpdate, MessageS2CPong,
};
use starkingdoms_protocol::module::ModuleType;
use starkingdoms_protocol::state::State;
use starkingdoms_protocol::{MessageC2S, MessageS2C, PROTOCOL_VERSION};
use std::error::Error;
use std::f64::consts::PI;
use std::net::SocketAddr;
use std::sync::Arc;
use std::time::{Duration, SystemTime};
use tungstenite::Message;
pub async fn handle_client(
mgr: ClientManager,
entities: Arc<RwLock<EntityHandler>>,
data: Arc<RwLock<PhysicsData>>,
remote_addr: SocketAddr,
rx: Receiver<ClientHandlerMessage>,
mut client_tx: SplitSink<WebSocketStream<TcpStream>, Message>,
mut client_rx: SplitStream<WebSocketStream<TcpStream>>,
) -> Result<(), Box<dyn Error>> {
let mut state = State::Handshake;
let mut username = String::new();
let mut ping_timeout = SystemTime::now() + Duration::from_secs(10);
loop {
if let Ok(msg) = rx.recv().await {
match msg {
ClientHandlerMessage::Tick => {} // this intentionally does nothing,
ClientHandlerMessage::ChatMessage { from, message } => {
if matches!(state, State::Play) {
let msg = MessageS2C::Chat(MessageS2CChat {
from,
message,
special_fields: Default::default(),
})
.try_into()?;
send!(client_tx, msg).await?;
}
}
ClientHandlerMessage::PlayersUpdate { players } => {
if matches!(state, State::Play) {
let msg = MessageS2C::PlayersUpdate(MessageS2CPlayersUpdate {
players,
special_fields: Default::default(),
})
.try_into()?;
send!(client_tx, msg).await?;
}
}
ClientHandlerMessage::PlanetData { planets } => {
if matches!(state, State::Play) {
let msg = MessageS2C::PlanetData(MessageS2CPlanetData {
planets,
special_fields: Default::default(),
})
.try_into()?;
send!(client_tx, msg).await?;
}
}
ClientHandlerMessage::ModulesUpdate { modules } => {
if matches!(state, State::Play) {
let msg = MessageS2C::ModulesUpdate(MessageS2CModulesUpdate {
modules,
special_fields: Default::default(),
})
.try_into()?;
send!(client_tx, msg).await?;
}
}
}
} else {
info!("channel closed, shutting down");
break;
}
if ping_timeout < SystemTime::now() {
error!("[{}] ping timeout", remote_addr);
let msg = MessageS2C::Goodbye(MessageS2CGoodbye {
reason: GoodbyeReason::PingPongTimeout.into(),
special_fields: Default::default(),
})
.try_into()?;
send!(client_tx, msg).await?;
break;
}
if let Some(pkt) = recv!(client_rx)? {
match state {
State::UNKNOWN => unreachable!(),
State::Handshake => {
match pkt {
MessageC2S::Hello(pkt) => {
info!("client sent hello");
if !matches!(pkt.next_state.unwrap(), State::Play) {
error!(
"client sent unexpected state {:?} (expected: Play)",
pkt.next_state
);
let msg = MessageS2C::Goodbye(MessageS2CGoodbye {
reason: GoodbyeReason::UnexpectedNextState.into(),
special_fields: Default::default(),
})
.try_into()?;
send!(client_tx, msg).await?;
break;
}
// check version
if pkt.version != PROTOCOL_VERSION {
error!(
"client sent incompatible version {} (expected: {})",
pkt.version, PROTOCOL_VERSION
);
let msg = MessageS2C::Goodbye(MessageS2CGoodbye {
reason: GoodbyeReason::UnsupportedProtocol.into(),
special_fields: Default::default(),
})
.try_into()?;
send!(client_tx, msg).await?;
break;
}
// determine if we can give them that username
{
if mgr
.usernames
.read()
.await
.values()
.any(|u| *u == pkt.requested_username)
{
error!(
"client requested username {} but it is in use",
pkt.requested_username
);
let msg: Vec<u8> = MessageS2C::Goodbye(MessageS2CGoodbye {
reason: GoodbyeReason::UsernameTaken.into(),
special_fields: Default::default(),
})
.try_into()?;
send!(client_tx, msg).await?;
break;
}
}
// username is fine
{
mgr.usernames
.write()
.await
.insert(remote_addr, pkt.requested_username.clone());
}
let msg = MessageS2C::Hello(MessageS2CHello {
version: pkt.version,
given_username: pkt.requested_username.clone(),
special_fields: Default::default(),
next_state: pkt.next_state,
})
.try_into()?;
send!(client_tx, msg).await?;
state = pkt.next_state.unwrap();
username = pkt.requested_username;
// make player rigidbody
{
let mut data_handle = data.write().await;
let mut rigid_body_set = data_handle.rigid_body_set.clone();
let mut collider_set = data_handle.collider_set.clone();
let angle: f64 = {
let mut rng = rand::thread_rng();
rng.gen::<f64>() * PI * 2.
};
let player_body = RigidBodyBuilder::new(RigidBodyType::Dynamic)
.translation(vector![
angle.cos() * 2050. / SCALE,
angle.sin() * 2050.0 / SCALE
])
.rotation(angle + PI / 2.)
.build();
debug!("rotation: {}", player_body.rotation().angle());
let player_collider: Collider =
ColliderBuilder::cuboid(25.0 / SCALE, 25.0 / SCALE)
.mass_properties(MassProperties::new(
point![0.0, 0.0],
120.0,
122500.0,
))
.build();
let player_handle = rigid_body_set.insert(player_body);
collider_set.insert_with_parent(
player_collider,
player_handle,
&mut rigid_body_set,
);
let mut player = Player {
handle: player_handle,
input: Default::default(),
addr: remote_addr,
auth_token: None,
auth_user: None,
children: [None, None, None, None],
};
let mut e_write_handle = entities.write().await;
if !pkt.user.is_empty() && !pkt.token.is_empty() {
player.auth_token = Some(pkt.token.clone());
player.auth_user = Some(pkt.user.clone());
info!(
"[{}] * Beamin: beaming in {} as {} with token {}",
remote_addr, username, pkt.user, pkt.token
);
let player_data = match load_player_data_from_api(
&pkt.token,
&pkt.user,
&std::env::var("STK_API_KEY").unwrap(),
)
.await
{
Ok(d) => d,
Err(e) => {
warn!(
"[{}] * Beamin: ABORTED. API returned error: {}",
remote_addr, e
);
e_write_handle
.entities
.insert(get_entity_id(), Entity::Player(player));
continue;
}
};
info!(
"[{}] Beamin: loaded player data! {:?}",
remote_addr, player_data
);
player.load_api_data(&player_data);
}
let player_id = get_entity_id();
e_write_handle
.entities
.insert(player_id, Entity::Player(player));
data_handle.rigid_body_set = rigid_body_set;
data_handle.collider_set = collider_set;
AttachedModule::attach_new(
&mut data_handle,
&mut e_write_handle,
player_id,
player_id,
ModuleTemplate {
translation: vector![0.0, 50.0],
mass_properties: MassProperties::new(
point![0.0, 0.0],
120.0,
122500.0,
),
module_type: ModuleType::Cargo,
},
0,
);
}
}
MessageC2S::Goodbye(pkt) => {
info!("client sent goodbye: {:?}", pkt.reason);
break;
}
_ => {
error!(
"client sent unexpected packet {:?} for state {:?}",
pkt, state
);
let msg = MessageS2C::Goodbye(MessageS2CGoodbye {
reason: GoodbyeReason::UnexpectedPacket.into(),
special_fields: Default::default(),
})
.try_into()?;
send!(client_tx, msg).await?;
break;
}
}
}
State::Play => match pkt {
MessageC2S::Hello { .. } => {
error!(
"client sent unexpected packet {:?} for state {:?}",
pkt, state
);
let msg = MessageS2C::Goodbye(MessageS2CGoodbye {
reason: GoodbyeReason::UnexpectedPacket.into(),
special_fields: Default::default(),
})
.try_into()?;
send!(client_tx, msg).await?;
break;
}
MessageC2S::Goodbye(pkt) => {
info!("client sent goodbye: {:?}", pkt.reason);
break;
}
MessageC2S::Chat(pkt) => {
info!("[{}] CHAT: [{}] {}", remote_addr, username, pkt.message);
for (_addr, client_thread) in mgr.handlers.read().await.iter() {
match client_thread
.tx
.send(ClientHandlerMessage::ChatMessage {
from: username.clone(),
message: pkt.message.clone(),
})
.await
{
Ok(_) => (),
Err(e) => {
error!("unable to update a client thread: {}", e);
}
}
}
}
MessageC2S::Ping(_) => {
let msg = MessageS2C::Pong(MessageS2CPong {
special_fields: Default::default(),
})
.try_into()?;
send!(client_tx, msg).await?;
ping_timeout = SystemTime::now() + Duration::from_secs(10);
}
MessageC2S::Input(p) => {
let mut handle = entities.write().await;
let id = handle
.get_player_id(remote_addr)
.expect("could not get player id");
if let Entity::Player(ref mut me) = handle
.entities
.get_mut(&id)
.expect("player disconnected but continued to send packets")
{
me.input.up = p.up_pressed;
me.input.down = p.down_pressed;
me.input.left = p.left_pressed;
me.input.right = p.right_pressed;
}
}
MessageC2S::AuthenticateAndBeamOut(p) => {
info!(
"[{}] * Beaming out {} as {} with realm token {}",
remote_addr, username, p.user_id, p.token
);
let player = entities
.read()
.await
.get_player(remote_addr)
.expect("Player sending messages after disconnect");
if Some(p.token) != player.auth_token || Some(p.user_id) != player.auth_user
{
warn!("[{}] invalid beamout packet, ignoring", remote_addr);
continue;
}
match save_player_data_to_api(
&player.as_api_data(),
&player.auth_token.unwrap(),
&player.auth_user.unwrap(),
&std::env::var("STK_API_KEY").unwrap(),
)
.await
{
Ok(_) => {
info!("[{}] * Beamed out successfully", remote_addr);
let msg = MessageS2C::Goodbye(MessageS2CGoodbye {
reason: GoodbyeReason::Done.into(),
special_fields: Default::default(),
})
.try_into()?;
send!(client_tx, msg).await?;
break;
}
Err(e) => {
error!("[{}] error beaming out: {}", remote_addr, e);
}
}
}
MessageC2S::MouseInput(p) => {
debug!("[{}] player input: {:?}", remote_addr, p);
}
},
}
}
}
Ok(())
}