feat: implement graceful shutdown process for bot

- Added graceful shutdown functionality to handle SIGINT, SIGTERM, uncaught exceptions, and unhandled promise rejections.
- Integrated stopRecording and pause functionality during shutdown.
- Enhanced logging for shutdown steps and error handling.
- Updated package.json to include pino-pretty for improved logging output.

package.json

@@ -32,6 +32,7 @@
     "@types/express": "^5.0.6",
     "@types/fluent-ffmpeg": "^2.1.28",
     "@types/ws": "^8.18.1",
+    "pino-pretty": "^10.3.1",
     "vitest": "latest"
   }
 }

src/index.ts

@@ -5,10 +5,9 @@ import { getVoiceConnection } from "@discordjs/voice";
 import { Client } from "discord.js-selfbot-v13";
 import { config } from "./config";
 import { discordPlayer } from "./player";
-import { startRecording } from "./recorder";
+import { startRecording, stopRecording } from "./recorder";
 import { startWebserver } from "./webserver";
 import { createChildLogger } from "./logger";
-import { retryWithBackoff } from "./retry";
 
 const logger = createChildLogger("bot");
 
@@ -24,6 +23,58 @@ if (!guildId) throw new Error("Missing GUILD_ID in .env");
 // Inisialisasi selfbot client
 const client = new Client();
 
+// Track shutdown state
+let isShuttingDown = false;
+
+async function gracefulShutdown(signal: string) {
+  if (isShuttingDown) {
+    logger.warn(`Already shutting down, ignoring ${signal}`);
+    return;
+  }
+
+  isShuttingDown = true;
+  logger.info({ signal }, "Graceful shutdown initiated");
+
+  try {
+    // Step 1: Stop recording
+    if (guildId) {
+      logger.info("Stopping recording...");
+      stopRecording(guildId);
+    }
+
+    // Step 2: Pause player
+    logger.info("Pausing player...");
+    discordPlayer.pause();
+
+    // Step 3: Destroy voice connection
+    if (guildId) {
+      const connection = getVoiceConnection(guildId);
+      if (connection) {
+        logger.info("Destroying voice connection...");
+        try {
+          connection.destroy();
+        } catch (err) {
+          logger.warn({ error: err }, "Error destroying voice connection");
+        }
+      }
+    }
+
+    // Step 4: Destroy client
+    logger.info("Destroying Discord client...");
+    try {
+      client.destroy();
+    } catch (err) {
+      logger.warn({ error: err }, "Error destroying client");
+    }
+
+    logger.info("Graceful shutdown completed");
+    process.exit(0);
+  } catch (err) {
+    logger.error({ error: err }, "Error during graceful shutdown");
+    process.exit(1);
+  }
+}
+
 client.on("ready", async () => {
   if (config.verbose) {
     logger.info({ user: client.user?.tag }, "Bot logged in");
@@ -70,21 +121,25 @@ client.on("error", (err) => {
   logger.error({ error: err }, "Client error");
 });
 
-// Graceful shutdown
+// Graceful shutdown handlers
 process.on("SIGINT", () => {
-  if (config.verbose) {
-    logger.info("Shutting down gracefully...");
-  }
-  client.destroy();
-  process.exit(0);
+  gracefulShutdown("SIGINT");
 });
 
 process.on("SIGTERM", () => {
-  if (config.verbose) {
-    logger.info("Terminating...");
-  }
-  client.destroy();
-  process.exit(0);
+  gracefulShutdown("SIGTERM");
+});
+
+// Handle uncaught exceptions
+process.on("uncaughtException", (err) => {
+  logger.error({ error: err }, "Uncaught exception");
+  gracefulShutdown("uncaughtException");
+});
+
+// Handle unhandled promise rejections
+process.on("unhandledRejection", (reason, promise) => {
+  logger.error({ reason, promise }, "Unhandled rejection");
+  gracefulShutdown("unhandledRejection");
 });
 
 client.login(token);