feat: implement simple web service, improve ServiceManager encapsulation

src/services/web.rs

@@ -0,0 +1,79 @@
+use super::Service;
+use crate::web::routes::{BannerState, create_banner_router};
+use std::net::SocketAddr;
+use tokio::net::TcpListener;
+use tokio::sync::broadcast;
+use tracing::{debug, info, warn};
+
+/// Web server service implementation
+pub struct WebService {
+    port: u16,
+    banner_state: BannerState,
+    shutdown_tx: Option<broadcast::Sender<()>>,
+}
+
+impl WebService {
+    pub fn new(port: u16, banner_state: BannerState) -> Self {
+        Self {
+            port,
+            banner_state,
+            shutdown_tx: None,
+        }
+    }
+}
+
+#[async_trait::async_trait]
+impl Service for WebService {
+    fn name(&self) -> &'static str {
+        "web"
+    }
+
+    async fn run(&mut self) -> Result<(), anyhow::Error> {
+        // Create the main router with Banner API routes
+        let app = create_banner_router(self.banner_state.clone());
+
+        let addr = SocketAddr::from(([0, 0, 0, 0], self.port));
+        info!(
+            service = "web",
+            link = format!("http://localhost:{}", addr.port()),
+            "Starting web server",
+        );
+
+        let listener = TcpListener::bind(addr).await?;
+        debug!(
+            service = "web",
+            "Web server listening on {}",
+            format!("http://{}", addr)
+        );
+
+        // Create internal shutdown channel for axum graceful shutdown
+        let (shutdown_tx, mut shutdown_rx) = broadcast::channel(1);
+        self.shutdown_tx = Some(shutdown_tx);
+
+        // Use axum's graceful shutdown with the internal shutdown signal
+        axum::serve(listener, app)
+            .with_graceful_shutdown(async move {
+                let _ = shutdown_rx.recv().await;
+                debug!(
+                    service = "web",
+                    "Received shutdown signal, starting graceful shutdown"
+                );
+            })
+            .await?;
+
+        info!(service = "web", "Web server stopped");
+        Ok(())
+    }
+
+    async fn shutdown(&mut self) -> Result<(), anyhow::Error> {
+        if let Some(shutdown_tx) = self.shutdown_tx.take() {
+            let _ = shutdown_tx.send(());
+        } else {
+            warn!(
+                service = "web",
+                "No shutdown channel found, cannot trigger graceful shutdown"
+            );
+        }
+        Ok(())
+    }
+}