3 files changed, 242 insertions, 0 deletions
diff --git a/actions/src/connection/action_service.rs b/actions/src/connection/action_service.rs
new file mode 100644
index 0000000..f137126
--- /dev/null
+++ b/actions/src/connection/action_service.rs
@@ -0,0 +1,221 @@
+use std::{
+    env::set_current_dir,
+    net::SocketAddr,
+    path::PathBuf,
+    sync::Arc,
+    time::{Duration, Instant},
+};
+
+use action_system::{action::ActionContext, action_pool::ActionPool};
+use cfg_file::config::ConfigFile;
+use log::{debug, error, info, warn};
+use tcp_connection::{error::TcpTargetError, instance::ConnectionInstance};
+use tokio::{
+    net::{TcpListener, TcpStream},
+    select, signal, spawn,
+    sync::mpsc,
+};
+use vcs_data::data::vault::{Vault, config::VaultConfig};
+
+use crate::{
+    connection::protocol::RemoteActionInvoke, registry::server_registry::server_action_pool,
+};
+
+// Start the server with a Vault using the specified directory
+pub async fn server_entry(
+    vault_path: impl Into<PathBuf>,
+    port_override: u16,
+) -> Result<(), TcpTargetError> {
+    let vault_path = vault_path.into();
+
+    // Set to vault path
+    set_current_dir(&vault_path).map_err(|e| TcpTargetError::Io(e.to_string()))?;
+
+    // Read the vault cfg
+    let vault_cfg = VaultConfig::read().await?;
+
+    // Create TCPListener
+    let listener = create_tcp_listener(&vault_cfg, port_override).await?;
+
+    // Initialize the vault
+    let vault: Arc<Vault> = init_vault(vault_cfg, vault_path).await?;
+
+    // Lock the vault
+    vault
+        .lock()
+        .map_err(|e| TcpTargetError::Locked(e.to_string()))?;
+
+    // Create ActionPool
+    let action_pool: Arc<ActionPool> = Arc::new(server_action_pool());
+
+    // Start the server
+    let (_shutdown_rx, future) = build_server_future(vault.clone(), action_pool.clone(), listener);
+    future.await?; // Start and block until shutdown
+
+    // Unlock the vault
+    vault.unlock()?;
+
+    Ok(())
+}
+
+async fn create_tcp_listener(
+    cfg: &VaultConfig,
+    port_override: u16,
+) -> Result<TcpListener, TcpTargetError> {
+    let local_bind_addr = cfg.server_config().local_bind();
+    let port = if port_override > 0 {
+        port_override // Override -> PORT > 0
+    } else {
+        cfg.server_config().port() // Default  -> Port = 0
+    };
+    let bind_port = port;
+    let sock_addr = SocketAddr::new(*local_bind_addr, bind_port);
+    let listener = TcpListener::bind(sock_addr).await?;
+
+    Ok(listener)
+}
+
+async fn init_vault(cfg: VaultConfig, path: PathBuf) -> Result<Arc<Vault>, TcpTargetError> {
+    // Init and create the vault
+    let Some(vault) = Vault::init(cfg, path) else {
+        return Err(TcpTargetError::NotFound("Vault not found".to_string()));
+    };
+    let vault: Arc<Vault> = Arc::new(vault);
+
+    Ok(vault)
+}
+
+fn build_server_future(
+    vault: Arc<Vault>,
+    action_pool: Arc<ActionPool>,
+    listener: TcpListener,
+) -> (
+    mpsc::Sender<()>,
+    impl std::future::Future<Output = Result<(), TcpTargetError>>,
+) {
+    let (tx, mut rx) = mpsc::channel::<i32>(100);
+    let (shutdown_tx, mut shutdown_rx) = mpsc::channel::<()>(1);
+    let mut active_connections = 0;
+    let mut shutdown_requested = false;
+
+    // Spawn task to handle Ctrl+C with rapid exit detection
+    let shutdown_tx_clone = shutdown_tx.clone();
+    spawn(async move {
+        let mut ctrl_c_count = 0;
+        let mut last_ctrl_c_time = Instant::now();
+
+        while let Ok(()) = signal::ctrl_c().await {
+            let now = Instant::now();
+
+            // Reset counter if more than 5 seconds have passed
+            if now.duration_since(last_ctrl_c_time) > Duration::from_secs(5) {
+                ctrl_c_count = 0;
+            }
+
+            ctrl_c_count += 1;
+            last_ctrl_c_time = now;
+
+            let _ = shutdown_tx_clone.send(()).await;
+
+            // If 3 Ctrl+C within 5 seconds, exit immediately
+            if ctrl_c_count >= 3 {
+                info!("Shutdown. (3/3)");
+                std::process::exit(0);
+            } else {
+                info!("Ctrl + C to force shutdown. ({} / 3)", ctrl_c_count);
+            }
+        }
+    });
+
+    let future = async move {
+        loop {
+            select! {
+                // Accept new connections
+                accept_result = listener.accept(), if !shutdown_requested => {
+                    match accept_result {
+                        Ok((stream, _addr)) => {
+                            debug!("New connection. (now {})", active_connections);
+                            let _ = tx.send(1).await;
+
+                            let vault_clone = vault.clone();
+                            let action_pool_clone = action_pool.clone();
+                            let tx_clone = tx.clone();
+
+                            spawn(async move {
+                                process_connection(stream, vault_clone, action_pool_clone).await;
+                                debug!("A connection closed. (now {})", active_connections);
+                                let _ = tx_clone.send(-1).await;
+                            });
+                        }
+                        Err(_) => {
+                            continue;
+                        }
+                    }
+                }
+
+                // Handle connection count updates
+                Some(count_change) = rx.recv() => {
+                    active_connections = (active_connections as i32 + count_change) as usize;
+
+                    // Check if we should shutdown after all connections are done
+                    if shutdown_requested && active_connections == 0 {
+                        break;
+                    }
+                }
+
+                // Handle shutdown signal
+                _ = shutdown_rx.recv() => {
+                    shutdown_requested = true;
+                    // If no active connections, break immediately
+                    if active_connections == 0 {
+                        info!("No active connections. Shutting down.");
+                        break;
+                    } else {
+                        warn!("Cannot shutdown while active connections exist! ({} active)", active_connections);
+                    }
+                }
+            }
+        }
+
+        Ok(())
+    };
+
+    (shutdown_tx, future)
+}
+
+async fn process_connection(stream: TcpStream, vault: Arc<Vault>, action_pool: Arc<ActionPool>) {
+    // Setup connection instance
+    let mut instance = ConnectionInstance::from(stream);
+
+    // Read action name and action arguments
+    let msg = match instance.read_msgpack::<RemoteActionInvoke>().await {
+        Ok(msg) => msg,
+        Err(e) => {
+            error!("Failed to read action message: {}", e);
+            return;
+        }
+    };
+
+    // Build context
+    let ctx: ActionContext = ActionContext::remote().insert_instance(instance);
+
+    // Insert vault into context
+    let ctx = ctx.with_arc_data(vault);
+
+    info!(
+        "Process action `{}` with argument `{}`",
+        msg.action_name, msg.action_args_json
+    );
+
+    // Process action
+    let result = action_pool
+        .process_json(&msg.action_name, ctx, msg.action_args_json)
+        .await;
+
+    match result {
+        Ok(_result_json) => {}
+        Err(e) => {
+            warn!("Failed to process action `{}`: {}", msg.action_name, e);
+        }
+    }
+}
diff --git a/actions/src/connection/error.rs b/actions/src/connection/error.rs
new file mode 100644
index 0000000..241c16e
--- /dev/null
+++ b/actions/src/connection/error.rs
@@ -0,0 +1,14 @@
+use std::io;
+use thiserror::Error;
+
+#[derive(Error, Debug, Clone)]
+pub enum ConnectionError {
+    #[error("I/O error: {0}")]
+    Io(String),
+}
+
+impl From<io::Error> for ConnectionError {
+    fn from(error: io::Error) -> Self {
+        ConnectionError::Io(error.to_string())
+    }
+}
diff --git a/actions/src/connection/protocol.rs b/actions/src/connection/protocol.rs
new file mode 100644
index 0000000..2cebe79
--- /dev/null
+++ b/actions/src/connection/protocol.rs
@@ -0,0 +1,7 @@
+use serde::{Deserialize, Serialize};
+
+#[derive(Default, Clone, Serialize, Deserialize)]
+pub struct RemoteActionInvoke {
+    pub action_name: String,
+    pub action_args_json: String,
+}