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extern crate proc_macro;
use quote::quote;
use syn::{DeriveInput, parse_macro_input};
#[proc_macro_derive(AutoNet)]
pub fn auto_net(input: proc_macro::TokenStream) -> proc_macro::TokenStream {
let input = parse_macro_input!(input as DeriveInput);
let name = input.ident;
let expanded = quote! {
#[async_trait::async_trait]
impl Network for #name {
async fn heartbeat(&self) {
let clients = self.clients.clone();
let peer_addresses = self.peer_addresses.clone();
let signer = self.signer.clone();
let id = self.id.to_string();
let interval = self.heartbeat_interval;
tokio::spawn(async move {
loop {
for (peer_id, client) in &clients {
let msg = Message::ping(&id, peer_id, 0);
let result = {
let client = client.lock().await;
client.send(msg).await
};
if let Err(e) = result {
debug!("Heartbeat failed to {peer_id}: {e}");
if let Some(addr) = peer_addresses.get(peer_id) {
debug!("Attempting to reconnect to {peer_id} at {addr}...");
match Client::connect(addr, signer.clone()).await {
Ok(new_client) => {
debug!("Reconnected to {peer_id}");
let mut locked = client.lock().await;
*locked = new_client;
}
Err(err) => {
debug!("Failed to reconnect to {peer_id}: {err}");
}
}
} else {
debug!("No known address for {peer_id}, cannot reconnect.");
}
}
}
tokio::time::sleep(interval).await;
}
});
}
async fn broadcast(&self, payload: &str) -> anyhow::Result<()> {
let tasks = self.clients.iter().map(|(peer_id, client)| {
let mut msg = Message::broadcast(&self.id, payload, 0);
msg.to = peer_id.clone();
let client = client.clone();
async move {
let send_result = {
let client_guard = client.lock().await;
let client_ref = client_guard.clone();
client_ref
}.send(msg).await;
if let Err(e) = send_result {
debug!("Broadcast to {peer_id} failed: {e}");
} else {
debug!("Broadcast to {peer_id} succeeded");
}
}
});
futures::future::join_all(tasks).await;
Ok(())
}
}
};
proc_macro::TokenStream::from(expanded)
}