initial commit

src/modules/common/signal.rs

@@ -0,0 +1,55 @@
+//
+// Copyright (c) 2025 rustmailer.com (https://rustmailer.com)
+//
+// This file is part of the Bichon Email Archiving Project
+//
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU Affero General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU Affero General Public License for more details.
+//
+// You should have received a copy of the GNU Affero General Public License
+// along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+
+use std::sync::LazyLock;
+
+use crate::modules::{
+    context::Initialize, error::BichonResult, utils::shutdown::shutdown_signal,
+};
+use tokio::sync::broadcast;
+
+pub static SIGNAL_MANAGER: LazyLock<SignalManager> = LazyLock::new(SignalManager::new);
+
+pub struct SignalManager {
+    sender: broadcast::Sender<()>,
+}
+
+impl SignalManager {
+    pub fn new() -> Self {
+        let (sender, _) = broadcast::channel(1);
+        SignalManager { sender }
+    }
+
+    pub fn subscribe(&self) -> broadcast::Receiver<()> {
+        self.sender.subscribe()
+    }
+}
+
+impl Initialize for SignalManager {
+    async fn initialize() -> BichonResult<()> {
+        tokio::spawn({
+            async move {
+                shutdown_signal().await;
+                println!("\nSending shutdown signal...");
+                let _ = SIGNAL_MANAGER.sender.send(());
+            }
+        });
+        Ok(())
+    }
+}