refactor: encapsulate startup logic and improve backup scheduling in index.js

download.js

@@ -0,0 +1,45 @@
+require('dotenv').config();
+const { 
+  downloadBackupFile, 
+  compressBackupFile, 
+  formatBytes, 
+  sendTelegramBroadcast 
+} = require('./index.js');
+
+async function downloadOnly() {
+  try {
+    console.log('Starting download process...');
+    
+    // Download backup file from SMB share
+    const localBackupFile = await downloadBackupFile();
+    console.log('Download completed:', localBackupFile);
+    
+    // Optionally compress the file
+    if (process.argv.includes('--compress')) {
+      const compressedFile = await compressBackupFile(localBackupFile);
+      console.log('Compression completed:', compressedFile);
+      
+      // Optionally send notification
+      if (process.argv.includes('--notify')) {
+        await sendTelegramBroadcast('all', `Backup downloaded and compressed ✅\nFile: ${compressedFile}`);
+      }
+    } else if (process.argv.includes('--notify')) {
+      await sendTelegramBroadcast('all', `Backup downloaded ✅\nFile: ${localBackupFile}`);
+    }
+    
+  } catch (error) {
+    console.error('Download failed:', error);
+    
+    // Optionally notify on error
+    if (process.argv.includes('--notify')) {
+      await sendTelegramBroadcast('errors', `Download failed 🔴\nError: ${error.message}`);
+    }
+  }
+}
+
+// Run if called directly
+if (require.main === module) {
+  downloadOnly();
+}
+
+module.exports = { downloadOnly };

index.js

@@ -310,44 +310,59 @@ async function runBackupProcess() {
   }
 }
 
-// Run backup immediately when starting
-(async () => {
-  try {
-    const latestBackupTime = await getLatestBackupTime();
-    const now = new Date();
-    let delay = 0;
+// Only run startup logic if this file is executed directly (not imported)
+if (require.main === module) {
+  // Run backup immediately when starting
+  (async () => {
+    try {
+      const latestBackupTime = await getLatestBackupTime();
+      const now = new Date();
+      let delay = 0;
 
-    if (latestBackupTime) {
-      const nextBackupTime = new Date(latestBackupTime.getTime() + 86400000);
-      if (nextBackupTime > now) {
-        delay = nextBackupTime - now;
-        console.log(`Scheduling first backup in ${Math.floor(delay / 3600000)} hours.`);
+      if (latestBackupTime) {
+        const nextBackupTime = new Date(latestBackupTime.getTime() + 86400000);
+        if (nextBackupTime > now) {
+          delay = nextBackupTime - now;
+          console.log(`Scheduling first backup in ${Math.floor(delay / 3600000)} hours.`);
+        }
       }
-    }
 
-    if (delay > 0) {
-      setTimeout(runBackupProcess, delay);
-    } else {
+      if (delay > 0) {
+        setTimeout(runBackupProcess, delay);
+      } else {
+        runBackupProcess();
+      }
+    } catch (err) {
+      console.error('Error during startup check, proceeding with backup:', err);
       runBackupProcess();
     }
-  } catch (err) {
-    console.error('Error during startup check, proceeding with backup:', err);
-    runBackupProcess();
-  }
-})();
+  })();
 
+  console.log('Database backup service started. Running backups every 24 hours.');
 
-console.log('Database backup service started. Running backups every 24 hours.');
+  // Startup health notification
+  (async () => {
+    try {
+      const when = new Date().toISOString();
+      const host = require('os').hostname();
+      const region = process.env.AWS_REGION || 'n/a';
+      const bucket = process.env.S3_BUCKET_NAME || 'n/a';
+      await sendTelegramBroadcast('all', `Backup service started ✅\nDB: ${process.env.MSSQL_DATABASE}\nHost: ${host}\nAWS: ${region}/${bucket}\nTime: ${when}`);
+    } catch (e) {
+      console.warn('Startup broadcast failed:', e.message);
+    }
+  })();
+}
 
-// Startup health notification
-(async () => {
-  try {
-    const when = new Date().toISOString();
-    const host = require('os').hostname();
-    const region = process.env.AWS_REGION || 'n/a';
-    const bucket = process.env.S3_BUCKET_NAME || 'n/a';
-    await sendTelegramBroadcast('all', `Backup service started ✅\nDB: ${process.env.MSSQL_DATABASE}\nHost: ${host}\nAWS: ${region}/${bucket}\nTime: ${when}`);
-  } catch (e) {
-    console.warn('Startup broadcast failed:', e.message);
-  }
-})();
+// Export functions for reuse in other scripts
+module.exports = {
+  downloadBackupFile,
+  compressBackupFile,
+  formatBytes,
+  sendTelegramBroadcast,
+  getDbSizeBytes,
+  // Export configurations that might be needed
+  smbConfig,
+  config: config, // MSSQL config
+  s3 // S3 client
+};