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|
mod shared;
use std::sync::Arc;
use async_trait::async_trait;
use clap::Parser;
use smol::{channel, Executor};
use karyon_p2p::{
endpoint::{Endpoint, Port},
keypair::{KeyPair, KeyPairType},
protocol::{Protocol, ProtocolEvent, ProtocolID},
Backend, Config, Error, Peer, Version,
};
use shared::{read_line_async, run_executor};
#[derive(Parser)]
#[command(author, version, about, long_about = None)]
struct Cli {
/// Optional list of bootstrap peers to start the seeding process.
#[arg(short)]
bootstrap_peers: Vec<Endpoint>,
/// Optional list of peer endpoints for manual connections.
#[arg(short)]
peer_endpoints: Vec<Endpoint>,
/// Optional endpoint for accepting incoming connections.
#[arg(short)]
listen_endpoint: Option<Endpoint>,
/// Optional TCP/UDP port for the discovery service.
#[arg(short)]
discovery_port: Option<Port>,
/// Username
#[arg(long)]
username: String,
}
pub struct ChatProtocol {
username: String,
peer: Arc<Peer>,
executor: Arc<Executor<'static>>,
}
impl ChatProtocol {
fn new(username: &str, peer: Arc<Peer>, executor: Arc<Executor<'static>>) -> Arc<dyn Protocol> {
Arc::new(Self {
peer,
username: username.to_string(),
executor,
})
}
}
#[async_trait]
impl Protocol for ChatProtocol {
async fn start(self: Arc<Self>) -> Result<(), Error> {
let task = self.executor.spawn({
let this = self.clone();
async move {
loop {
let input = read_line_async().await.expect("Read line from stdin");
let msg = format!("> {}: {}", this.username, input.trim());
this.peer.broadcast(&Self::id(), &msg).await;
}
}
});
let listener = self.peer.register_listener::<Self>().await;
loop {
let event = listener.recv().await.expect("Receive new protocol event");
match event {
ProtocolEvent::Message(msg) => {
let msg = String::from_utf8(msg).expect("Convert received bytes to string");
println!("{msg}");
}
ProtocolEvent::Shutdown => {
break;
}
}
}
task.cancel().await;
listener.cancel().await;
Ok(())
}
fn version() -> Result<Version, Error> {
"0.1.0, 0.1.0".parse()
}
fn id() -> ProtocolID {
"CHAT".into()
}
}
fn main() {
env_logger::init();
let cli = Cli::parse();
// Create a PeerID based on the username.
let key_pair = KeyPair::generate(&KeyPairType::Ed25519);
// Create the configuration for the backend.
let config = Config {
listen_endpoint: cli.listen_endpoint,
peer_endpoints: cli.peer_endpoints,
bootstrap_peers: cli.bootstrap_peers,
discovery_port: cli.discovery_port.unwrap_or(0),
enable_tls: true,
..Default::default()
};
// Create a new Executor
let ex = Arc::new(Executor::new());
// Create a new Backend
let backend = Backend::new(&key_pair, config, ex.clone().into());
let (ctrlc_s, ctrlc_r) = channel::unbounded();
let handle = move || ctrlc_s.try_send(()).expect("Send ctrlc signal");
ctrlc::set_handler(handle).expect("ctrlc set handler");
run_executor(
{
let ex = ex.clone();
async {
let username = cli.username;
// Attach the ChatProtocol
let c = move |peer| ChatProtocol::new(&username, peer, ex.clone().into());
backend
.attach_protocol::<ChatProtocol>(c)
.await
.expect("Attach chat protocol to the p2p backend");
// Run the backend
backend.run().await.expect("Run the backend");
// Wait for ctrlc signal
ctrlc_r.recv().await.expect("Receive ctrlc signal");
// Shutdown the backend
backend.shutdown().await;
}
},
ex,
);
}
|
