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//! Socket File client implementation
pub mod actions;
pub use actions::SocketFileClientProtocol;
use anyhow::{Context, Result};
use std::net::SocketAddr;
use std::sync::Arc;
use tokio::io::{AsyncReadExt, AsyncWriteExt};
use tokio::net::UnixStream;
use tokio::sync::{mpsc, Mutex};
use tracing::{error, info, trace};
use crate::client::llm_budget::call_llm_for_client;
use crate::client::socket_file::actions::SOCKET_FILE_CLIENT_DATA_RECEIVED_EVENT;
use crate::llm::ollama_client::OllamaClient;
use crate::llm::ClientLlmResult;
use crate::protocol::Event;
use crate::state::app_state::AppState;
use crate::state::{ClientId, ClientStatus};
/// Connection state for LLM processing
#[derive(Debug, Clone, PartialEq)]
enum ConnectionState {
Idle,
Processing,
Accumulating,
}
/// Per-client data for LLM handling
struct ClientData {
state: ConnectionState,
queued_data: Vec<u8>,
memory: String,
}
/// Socket File client that connects to a Unix domain socket
pub struct SocketFileClient;
impl SocketFileClient {
/// Connect to a Unix domain socket with integrated LLM actions
pub async fn connect_with_llm_actions(
socket_path: String,
llm_client: OllamaClient,
app_state: Arc<AppState>,
status_tx: mpsc::UnboundedSender<String>,
client_id: ClientId,
) -> Result<SocketAddr> {
// Connect to Unix domain socket
let stream = UnixStream::connect(&socket_path)
.await
.context(format!("Failed to connect to Unix socket {}", socket_path))?;
// Unix sockets don't have traditional socket addresses, so we create a dummy one
// The socket path is stored in the client's remote_addr field in app_state
let dummy_addr = SocketAddr::from(([127, 0, 0, 1], 0));
info!(
"Socket File client {} connected to {}",
client_id, socket_path
);
// Update client state
app_state
.update_client_status(client_id, ClientStatus::Connected)
.await;
let _ = status_tx.send(format!(
"[CLIENT] Socket File client {} connected to {}",
client_id, socket_path
));
let _ = status_tx.send("__UPDATE_UI__".to_string());
// Split stream
let (mut read_half, write_half) = stream.into_split();
let write_half_arc = Arc::new(Mutex::new(write_half));
// Initialize client data
let client_data = Arc::new(Mutex::new(ClientData {
state: ConnectionState::Idle,
queued_data: Vec::new(),
memory: String::new(),
}));
// Spawn read loop
// Registered with AppState so stop_client can abort this task —
// dropping a JoinHandle only detaches it in Tokio.
let task_registrar = app_state.clone();
// Command channel: lets the dashboard inject actions into this loop
// via AppState::send_to_client (see client/command_support.rs).
let mut command_rx =
crate::client::command_support::register_command_channel(&app_state, client_id).await;
// Raise the connected event.
//
// SOCKET_FILE_CLIENT_CONNECTED_EVENT was declared and nothing raised it, so the
// model was only ever consulted once the peer had already said something. A client
// meant to speak first -- which this protocol's own example action
// (`send_socket_file_data`) implies -- could never do so.
//
// From a registered task, not inline: a dashboard-created client defaults to a
// `*` -> manual rule and awaiting a parked answer would block creation.
let conn_state = app_state.clone();
let conn_llm = llm_client.clone();
let conn_status = status_tx.clone();
let conn_write = write_half_arc.clone();
let conn_path = socket_path.clone();
let conn_task = tokio::spawn(async move {
let Some(instruction) = conn_state.get_instruction_for_client(client_id).await else {
return;
};
let protocol = crate::client::socket_file::actions::SocketFileClientProtocol::new();
let event = Event::new(
&crate::client::socket_file::actions::SOCKET_FILE_CLIENT_CONNECTED_EVENT,
serde_json::json!({ "socket_path": conn_path }),
);
match call_llm_for_client(
&conn_llm,
&conn_state,
client_id.to_string(),
&instruction,
"",
Some(&event),
&protocol,
&conn_status,
)
.await
{
Ok(result) => {
if let Some(mem) = result.memory_updates {
conn_state.set_memory_for_client(client_id, mem).await;
}
use crate::llm::actions::client_trait::{Client, ClientActionResult};
for action in result.actions {
if let Ok(ClientActionResult::SendData(bytes)) =
protocol.execute_action(action)
{
let mut guard = conn_write.lock().await;
if let Err(e) = guard.write_all(&bytes).await {
error!(
"Socket File client {} connect-time write failed: {}",
client_id, e
);
}
}
}
}
Err(e) => error!(
"Socket File client {} LLM error on connected event: {}",
client_id, e
),
}
});
app_state.register_client_task(client_id, conn_task).await;
let task_handle = tokio::spawn(async move {
let mut buffer = vec![0u8; 8192];
loop {
let read_result = tokio::select! {
read = read_half.read(&mut buffer) => read,
Some(cmd) = command_rx.recv() => {
let disconnect = crate::client::command_support::handle_stream_client_command(
&crate::client::socket_file::actions::SocketFileClientProtocol,
&write_half_arc,
cmd,
client_id,
&app_state,
&status_tx,
)
.await;
if disconnect {
app_state
.update_client_status(client_id, ClientStatus::Disconnected)
.await;
let _ = status_tx.send(format!(
"[CLIENT] SocketFile client {} disconnected (injected action)",
client_id
));
let _ = status_tx.send("__UPDATE_UI__".to_string());
break;
}
continue;
}
};
match read_result {
Ok(0) => {
info!("Socket File client {} disconnected", client_id);
app_state
.update_client_status(client_id, ClientStatus::Disconnected)
.await;
let _ = status_tx.send(format!(
"[CLIENT] Socket File client {} disconnected",
client_id
));
let _ = status_tx.send("__UPDATE_UI__".to_string());
break;
}
Ok(n) => {
let data = buffer[..n].to_vec();
trace!("Socket File client {} received {} bytes", client_id, n);
// A round-trip is already in flight: queue these bytes and let the
// in-flight round-trip pick them up when it finishes. They used to be
// queued and then *cleared* without ever being shown to the model.
{
let mut guard = client_data.lock().await;
if guard.state != ConnectionState::Idle {
guard.queued_data.extend_from_slice(&data);
guard.state = ConnectionState::Accumulating;
continue;
}
guard.state = ConnectionState::Processing;
}
let mut pending = data;
let mut disconnect = false;
loop {
let Some(instruction) =
app_state.get_instruction_for_client(client_id).await
else {
break;
};
// Copy the memory OUT of the mutex before the call. Passing
// `&client_data.lock().await.memory` as an argument keeps the guard
// alive for the whole `match` that awaits it - a lock held across an
// LLM call, and a self-deadlock the moment the arm re-locks to store
// a memory update.
let memory = client_data.lock().await.memory.clone();
let protocol =
crate::client::socket_file::actions::SocketFileClientProtocol::new(
);
let (data_str, encoding) = if pending
.iter()
.all(|&b| b.is_ascii_graphic() || b.is_ascii_whitespace())
{
(String::from_utf8_lossy(&pending).to_string(), "utf8")
} else {
(hex::encode(&pending), "hex")
};
let event = Event::new(
&SOCKET_FILE_CLIENT_DATA_RECEIVED_EVENT,
serde_json::json!({
"data": data_str,
"encoding": encoding,
"data_length": pending.len(),
}),
);
let result = call_llm_for_client(
&llm_client,
&app_state,
client_id.to_string(),
&instruction,
&memory,
Some(&event),
&protocol,
&status_tx,
)
.await;
match result {
Ok(ClientLlmResult {
actions,
memory_updates,
}) => {
if let Some(mem) = memory_updates {
client_data.lock().await.memory = mem;
}
use crate::llm::actions::client_trait::{
Client, ClientActionResult,
};
for action in actions {
match protocol.execute_action(action) {
Ok(ClientActionResult::SendData(bytes)) => {
let mut guard = write_half_arc.lock().await;
match guard.write_all(&bytes).await {
Ok(()) => trace!(
"Socket File client {} sent {} bytes",
client_id,
bytes.len()
),
Err(e) => error!(
"Socket File client {} write failed: {}",
client_id, e
),
}
}
Ok(ClientActionResult::Disconnect) => {
// Actually hang up. This used to `break` the
// action loop only, so the socket stayed open and
// the model's decision did nothing.
disconnect = true;
break;
}
Ok(_) => {}
Err(e) => error!(
"Socket File client {} rejected an action: {}",
client_id, e
),
}
}
}
Err(e) => {
error!("LLM error for Socket File client {}: {}", client_id, e);
}
}
if disconnect {
break;
}
// Anything that arrived during the call becomes the next payload,
// exactly as the socket_file *server* does it.
let queued = {
let mut guard = client_data.lock().await;
std::mem::take(&mut guard.queued_data)
};
if queued.is_empty() {
break;
}
pending = queued;
}
client_data.lock().await.state = ConnectionState::Idle;
if disconnect {
info!("Socket File client {} disconnecting", client_id);
let _ = write_half_arc.lock().await.shutdown().await;
app_state
.update_client_status(client_id, ClientStatus::Disconnected)
.await;
let _ = status_tx.send(format!(
"[CLIENT] Socket File client {} disconnected (model)",
client_id
));
let _ = status_tx.send("__UPDATE_UI__".to_string());
break;
}
}
Err(e) => {
error!("Socket File client {} read error: {}", client_id, e);
app_state
.update_client_status(client_id, ClientStatus::Error(e.to_string()))
.await;
let _ = status_tx.send("__UPDATE_UI__".to_string());
break;
}
}
}
// The loop owns the only receiver; dropping the registered handle
// makes later send_to_client calls fail fast instead of timing out.
app_state.remove_client_handle(client_id).await;
});
task_registrar
.register_client_task(client_id, task_handle)
.await;
Ok(dummy_addr)
}
}