express routing

Web-Server/modules/express.js

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+/*
+1) api route 
+2) enforce best practice for api routes
+
+
+*/
+const express = require("express");
+const app = express();
+const port = 3000;
+
+const testRoute = require("../routes/test.js")
+const testRoute1 = require("../routes/latest-Data.js")
+
+app.use('/test', testRoute); 
+app.use('/api/latest-data', testRoute1);
+
+
+app.listen(port, () => {
+	console.log(`app listening on port ${port}`);
+});
+
+module.exports = { app };

Web-Server/routes/latest-Data.js

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+const { sequelize }  = require("../../Database/mySql.js");
+const { IoTModel } = require("../../Database/model/IoTModel.js"); 
+const express = require('express');
+const router = express.Router();
+
+// Logic for model and API
+async function getLatestData() {
+  try {
+    sequelize.sync();
+    const latestData = await IoTModel.findAll({
+      order: [['createdAt', 'DESC']],
+    });
+    return latestData;
+  }
+  catch (error) {
+    console.error('Error:', error);
+    return null;
+  }
+}
+
+
+router.get('/', async (req, res) => {
+  try {
+    const data = await getLatestData();
+
+    if (data === null) {
+      res.status(404).send("No data found");
+    } else {
+      res.status(200).send(data);
+    }
+  } catch (error) {
+    console.error('Error:', error);
+    res.status(500).send('Internal Server Error');
+  }
+});
+
+// Export the router
+module.exports = router;

Web-Server/routes/test.js

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+const { sequelize }  = require("../../Database/mySql.js");
+const { IoTModel } = require("../../Database/model/IoTModel.js"); 
+const express = require('express');
+const router = express.Router();
+
+async function getallData() {
+  try {
+    sequelize.sync();
+    const allData = await IoTModel.findAll({
+        attributes: ['id', 'psiData', 'humidityData', 'o3Data', 'no2Data', 'so2Data', 'coData', 'temperatureData', 'windspeedData', 'currentTime', 'regionData' , 'createdAt' , 'updatedAt'],
+    });
+    return allData;
+    }
+    catch(error) {
+        console.error('Error:', error);
+        return null;
+    }
+}
+
+router.get('/', async (req, res) => {
+  try {
+    const data = await getallData();
+
+    if (data === null) {
+      res.status(404).send("No data found");
+    } else {
+      res.send(data);   
+    }
+  } catch (error) {
+    console.error('Error:', error);
+    res.status(500).send('Internal Server Error');
+  }
+});
+
+// Export the router
+module.exports = router;