Added auto-backups feature (#107)

lib/scheduler.ts

@@ -0,0 +1,54 @@
+import cron from 'node-cron';
+import { runBackup } from './backup';
+
+let isSchedulerInitialized = false;
+
+export function initializeScheduler() {
+  if (isSchedulerInitialized) {
+    console.log('Scheduler already initialized.');
+    return;
+  }
+
+  console.log('Initializing scheduler...');
+
+  // Schedule backup to run daily at 2:00 AM server time
+  // Format: second minute hour day-of-month month day-of-week
+  // '0 2 * * *' means at minute 0 of hour 2 (2:00 AM) every day
+  const backupJob = cron.schedule('0 2 * * *', async () => {
+    console.log(`[${new Date().toISOString()}] Running scheduled daily backup task...`);
+    try {
+      await runBackup();
+      console.log(`[${new Date().toISOString()}] Scheduled backup task completed successfully.`);
+    } catch (err) {
+      console.error(`[${new Date().toISOString()}] Scheduled backup task failed:`, err);
+    }
+  }, {
+    scheduled: true,
+    // Consider adding timezone support later if needed, based on user settings
+    // timezone: "Your/Timezone"
+  });
+
+  console.log('Scheduler initialized. Daily backup scheduled for 2:00 AM server time.');
+  isSchedulerInitialized = true;
+
+  // Graceful shutdown handling (optional but recommended)
+  process.on('SIGTERM', () => {
+    console.log('SIGTERM signal received. Stopping scheduler...');
+    backupJob.stop();
+    // Add cleanup for other jobs if needed
+    process.exit(0);
+  });
+
+  process.on('SIGINT', () => {
+    console.log('SIGINT signal received. Stopping scheduler...');
+    backupJob.stop();
+    // Add cleanup for other jobs if needed
+    process.exit(0);
+  });
+
+  // --- Add other scheduled tasks here in the future ---
+  // Example:
+  // cron.schedule('* * * * *', () => {
+  //   console.log('Running every minute');
+  // });
+}