Just one time can a new Round be startet

events.js

 const express = require('express');
 const io = require("socket.io-client");
-const socket = io('ws://tabu-server.willers.digital');
-//const socket = io('ws://localhost:80');
+//const socket = io('ws://tabu-server.willers.digital');
+const socket = io('ws://localhost:3000');
 
 function createRouter(db) {
     const router = express.Router();
@@ -184,6 +184,31 @@ function createRouter(db) {
         }
     };
 
+    const isActiveExplainer = function isActiveExplainer(req, res, next) {
+        const spielname = req.body.spielname;
+        if (spielname.match(/^[0-9a-zA-Z]+$/) != null) {
+            const sql = 'SELECT ActiveExplainer FROM Gamestatus WHERE SessionID = (SELECT SessionID FROM Session WHERE SessionName = \"'+spielname+'\")';
+            console.log('isActiveExplainer: ',sql)
+            db.query(
+                sql,
+                (error, results) => {
+                     console.log('Result: ', results);
+                    if (error) {
+                        console.log(error);
+                        res.header('Access-Control-Allow-Origin', "*").status(500).json({status: 'false', reason: 'Round is active'});
+                    } else {
+                        const activeExplainer = JSON.parse(results[0].ActiveExplainer);
+                        if (activeExplainer === 0) {
+                            next();
+                        } else {
+                            res.header('Access-Control-Allow-Origin', "*").status(500).json({status: 'false', reason: 'Round is active'});
+                        }
+                    }
+                }
+            );
+        }
+    };
+
     const newRound = function newRound(req, res) {
         const spielname = req.body.spielname;
         if (spielname.match(/^[0-9a-zA-Z]+$/) != null) {
@@ -206,7 +231,7 @@ function createRouter(db) {
                 }
             );
         } else {
-            res.header('Access-Control-Allow-Origin', "*").status(500).json({status: 'false'});
+            res.header('Access-Control-Allow-Origin', "*").status(500).json({status: 'false', reason: 'Already Active Game'});
         }
     };
 
@@ -234,7 +259,7 @@ function createRouter(db) {
         } else {
             //res.header('Access-Control-Allow-Origin', "*").status(500).json({status: 'false'});
         }
-    };
+    }
 
     const newGame = function newGame(req, res) {
         const spielname = req.body.spielname;
@@ -408,13 +433,13 @@ function createRouter(db) {
     router.post('/getS2C', [getS2C]);
 
     //Start a new Round and lock the game positions
-    router.post('/newRound', [newRound]);
+    router.post('/newRound', [isActiveExplainer, newRound]);
 
     //End a Round and unlock the game positions and invert RedTurn
     router.post('/endRound', [endRound]);
 
     //Starts a new Game and resets red and blue and chooses a random value for RedTurn
-    router.post('/newGame', [newGame]);
+    router.post('/newGame', [isActiveExplainer, newGame]);
 
     //Add Point
     router.post('/addPoint', [addPoint]);

socket.js

@@ -6,7 +6,7 @@ const Socketio = require("socket.io")(Http, {
     }
 });
 
-Http.listen(80, () => {
+Http.listen(3000, () => {
     console.log("Listening at :3000...");
 });