Merge branch 'master' of https://github.com/Arquisoft/wiq_en2a

gatewayservice/gateway-service.js

@@ -3,6 +3,11 @@ const axios = require('axios');
 const cors = require('cors');
 const promBundle = require('express-prom-bundle');
 
+// libraries required for OpenAPI-Swagger
+const swaggerUI = require('swagger-ui-express');
+const fs = require("fs");
+const YAML = require('yaml');
+
 const app = express();
 const port = 8000;
 
@@ -182,6 +187,22 @@ app.get('/getGroups', async (req, res) => {
   }
 })
 
+// Read the OpenAPI YAML file synchronously
+openapiPath='./openapi.yaml'
+if (fs.existsSync(openapiPath)) {
+  const file = fs.readFileSync(openapiPath, 'utf8');
+
+  // Parse the YAML content into a JavaScript object representing the Swagger document
+  const swaggerDocument = YAML.parse(file);
+
+  // Serve the Swagger UI documentation at the '/api-doc' endpoint
+  // This middleware serves the Swagger UI files and sets up the Swagger UI page
+  // It takes the parsed Swagger document as input
+  app.use('/api-doc', swaggerUI.serve, swaggerUI.setup(swaggerDocument));
+} else {
+  console.log("Not configuring OpenAPI. Configuration file not present.")
+}
+
 
 // Start the gateway service
 const server = app.listen(port, () => {