From 407f817c8df37cdaac3f55f7782525fff782ba1c Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Nick=20=27MorpheusXAUT=27=20M=C3=BCller?=
 <nick@morpheusxaut.net>
Date: Sat, 25 Mar 2023 17:23:15 +0100
Subject: [PATCH] Add interrupt signal handling for graceful server shutdown

---
 backend/src/app.ts | 18 +++++++++++++++++-
 1 file changed, 17 insertions(+), 1 deletion(-)

diff --git a/backend/src/app.ts b/backend/src/app.ts
index 7f1c251..a5f0d96 100644
--- a/backend/src/app.ts
+++ b/backend/src/app.ts
@@ -28,8 +28,24 @@ app.use((err, req: Request, res: Response, next: NextFunction) => {
 nodesched.scheduleJob('regenerate data', '*/30 * * * * *', wxService.wrappedGenerateData)
 wxService.wrappedGenerateData();
 
-app.listen(PORT, () => {
+const server = app.listen(PORT, () => {
   console.log(
     `application is listening on port ${PORT}`,
   );
 });
+
+const shutdown = (signal: string) => {
+  console.log(`${signal} signal received. Shutting down.`);
+  server.close((err) => {
+    if (err) {
+      console.error(`Failed to shut down server gracefully: ${err}`);
+      process.exit(1);
+    }
+
+    console.log('Server closed');
+    process.exit(0);
+  });
+};
+
+process.on('SIGTERM', () => shutdown('SIGTERM'));
+process.on('SIGINT', () => shutdown('SIGINT'));