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|
pub mod pb {
tonic::include_proto!("grpc.planetwars.bot_api");
}
use std::collections::HashMap;
use std::net::SocketAddr;
use std::path::PathBuf;
use std::sync::{Arc, Mutex};
use runner::match_context::{EventBus, PlayerHandle, RequestMessage};
use runner::match_log::MatchLogger;
use tokio::sync::{mpsc, oneshot};
use tokio_stream::wrappers::UnboundedReceiverStream;
use tonic;
use tonic::transport::Server;
use tonic::{Request, Response, Status, Streaming};
use planetwars_matchrunner as runner;
use crate::db;
use crate::{ConnectionPool, MAPS_DIR, MATCHES_DIR};
use super::matches::code_bundle_to_botspec;
pub struct BotApiServer {
router: PlayerRouter,
}
/// Routes players to their handler
#[derive(Clone)]
struct PlayerRouter {
routing_table: Arc<Mutex<HashMap<String, SyncThingData>>>,
}
impl PlayerRouter {
pub fn new() -> Self {
PlayerRouter {
routing_table: Arc::new(Mutex::new(HashMap::new())),
}
}
}
// TODO: implement a way to expire entries
impl PlayerRouter {
fn put(&self, player_id: String, entry: SyncThingData) {
let mut routing_table = self.routing_table.lock().unwrap();
routing_table.insert(player_id, entry);
}
fn get(&self, player_id: &str) -> Option<SyncThingData> {
// TODO: this design does not allow for reconnects. Is this desired?
let mut routing_table = self.routing_table.lock().unwrap();
routing_table.remove(player_id)
}
}
#[tonic::async_trait]
impl pb::bot_api_service_server::BotApiService for BotApiServer {
type ConnectBotStream = UnboundedReceiverStream<Result<pb::PlayerRequest, Status>>;
async fn connect_bot(
&self,
req: Request<Streaming<pb::PlayerRequestResponse>>,
) -> Result<Response<Self::ConnectBotStream>, Status> {
println!("bot connected");
let stream = req.into_inner();
// TODO: return error when player does not exist
let sync_data = self.router.get("test_player").unwrap();
sync_data.tx.send(stream).unwrap();
Ok(Response::new(UnboundedReceiverStream::new(
sync_data.server_messages,
)))
}
}
struct SyncThingData {
tx: oneshot::Sender<Streaming<pb::PlayerRequestResponse>>,
server_messages: mpsc::UnboundedReceiver<Result<pb::PlayerRequest, Status>>,
}
struct RemoteBotSpec {
router: PlayerRouter,
}
#[tonic::async_trait]
impl runner::BotSpec for RemoteBotSpec {
async fn run_bot(
&self,
player_id: u32,
event_bus: Arc<Mutex<EventBus>>,
_match_logger: MatchLogger,
) -> Box<dyn PlayerHandle> {
let (tx, rx) = oneshot::channel();
let (server_msg_snd, server_msg_recv) = mpsc::unbounded_channel();
self.router.put(
"test_player".to_string(),
SyncThingData {
tx,
server_messages: server_msg_recv,
},
);
let client_messages = rx.await.unwrap();
tokio::spawn(handle_bot_messages(player_id, event_bus, client_messages));
Box::new(RemoteBotHandle {
sender: server_msg_snd,
})
}
}
async fn handle_bot_messages(
player_id: u32,
event_bus: Arc<Mutex<EventBus>>,
mut messages: Streaming<pb::PlayerRequestResponse>,
) {
while let Some(message) = messages.message().await.unwrap() {
let request_id = (player_id, message.request_id as u32);
event_bus
.lock()
.unwrap()
.resolve_request(request_id, Ok(message.content));
}
}
struct RemoteBotHandle {
sender: mpsc::UnboundedSender<Result<pb::PlayerRequest, Status>>,
}
impl PlayerHandle for RemoteBotHandle {
fn send_request(&mut self, r: RequestMessage) {
self.sender
.send(Ok(pb::PlayerRequest {
request_id: r.request_id as i32,
content: r.content,
}))
.unwrap();
}
}
async fn run_match(router: PlayerRouter, pool: ConnectionPool) {
let conn = pool.get().await.unwrap();
let opponent = db::bots::find_bot_by_name("simplebot", &conn).unwrap();
let opponent_code_bundle = db::bots::active_code_bundle(opponent.id, &conn).unwrap();
let log_file_name = "remote_match.log";
let remote_bot_spec = RemoteBotSpec { router };
let match_config = runner::MatchConfig {
map_path: PathBuf::from(MAPS_DIR).join("hex.json"),
map_name: "hex".to_string(),
log_path: PathBuf::from(MATCHES_DIR).join(&log_file_name),
players: vec![
runner::MatchPlayer {
bot_spec: Box::new(remote_bot_spec),
},
runner::MatchPlayer {
bot_spec: code_bundle_to_botspec(&opponent_code_bundle),
},
],
};
runner::run_match(match_config).await;
}
pub async fn run_bot_api(pool: ConnectionPool) {
let router = PlayerRouter::new();
tokio::spawn(run_match(router.clone(), pool));
let server = BotApiServer { router };
let addr = SocketAddr::from(([127, 0, 0, 1], 50051));
Server::builder()
.add_service(pb::bot_api_service_server::BotApiServiceServer::new(server))
.serve(addr)
.await
.unwrap()
}
|
