feat(wip): write to sheets

server/src/routes/integration.ts

@@ -17,4 +17,42 @@ router.post('/upload-credentials', (req, res) => {
   fs.writeFileSync(storedCredentialsPath, JSON.stringify(credentials));
 
   res.status(200).json({ message: 'Service Account credentials saved successfully.' });
-});
+});
+
+router.post('/write-to-sheet', async (req, res) => {
+    try {
+      const { spreadsheetId, range, values } = req.body;
+  
+      // Load the stored credentials
+      const credentialsPath = path.join(__dirname, 'service_account_credentials.json');
+      if (!fs.existsSync(credentialsPath)) {
+        return res.status(400).json({ message: 'No credentials found. Please provide credentials first.' });
+      }
+  
+      const credentials = JSON.parse(fs.readFileSync(credentialsPath, 'utf-8'));
+  
+      // Authenticate with Google using the service account credentials
+      const auth = new google.auth.GoogleAuth({
+        credentials,
+        scopes: ['https://www.googleapis.com/auth/spreadsheets'],
+      });
+  
+      const sheets = google.sheets({ version: 'v4', auth });
+  
+      // Write data to the provided Google Sheet and range
+      await sheets.spreadsheets.values.append({
+        spreadsheetId,
+        range,
+        valueInputOption: 'USER_ENTERED',
+        resource: {
+          values: values, // Expecting an array of arrays, like [['data1', 'data2'], ['data3', 'data4']]
+        },
+      });
+  
+      res.status(200).json({ message: 'Data written to Google Sheet successfully.' });
+    } catch (error) {
+      console.error('Error writing to sheet:', error);
+      res.status(500).json({ message: 'Failed to write to Google Sheet.', error });
+    }
+  });
+