testing the latest

index.js

@@ -69,6 +69,21 @@ app.get('/api/measurements', (req, res) => {
   res.json(measurements);
 });
 
+app.get('/api/measurements/latest', (req, res) => {
+  // Check whether any measurements exist.
+  if (measurements.length === 0) {
+    return res.status(404).json({
+      error: 'No measurements yet'
+    });
+  }
+
+  // The last array element is the latest submitted measurement.
+  const latest = measurements[measurements.length - 1];
+
+  res.json(latest);
+});
+
+
 // starting the listening service
 app.listen(3030, () => {
   console.log('Server running at http://localhost:3030');