Sort Out isSession into function

events.js

@@ -3,6 +3,29 @@ const express = require('express');
 function createRouter(db) {
     const router = express.Router();
 
+    function isSession(req, res) {
+        const spielname = req.body.spielname;
+        if (spielname.match(/^[0-9a-zA-Z]+$/) != null) {
+            db.query(
+                'SELECT SessionName FROM Session WHERE SessionName = \''+spielname+'\';',
+                (error, results) => {
+                    if (error) {
+                        console.log(error);
+                        return res.status(500).json({status: 'error'});
+                    } else {
+                        if (results.length > 0) {
+                            return res.status(200).json({status: 'true'});
+                        } else {
+                            return res.status(200).json({status: 'false'});
+                        }
+                    }
+                }
+            );
+        } else {
+            return res.status(500).json({status: 'error'});
+        }
+    }
+
     // the routes are defined here
 
     //Generate new Session
@@ -40,26 +63,7 @@ function createRouter(db) {
 
     //Check if Session exist
     router.post('/isSession', (req, res) => {
-        const spielname = req.body.spielname;
-        if (spielname.match(/^[0-9a-zA-Z]+$/) != null) {
-            db.query(
-                'SELECT SessionName FROM Session WHERE SessionName = \''+spielname+'\';',
-                (error, results) => {
-                    if (error) {
-                        console.log(error);
-                        res.status(500).json({status: 'error'});
-                    } else {
-                        if (results.length > 0) {
-                            res.status(200).json({status: 'true'});
-                        } else {
-                            res.status(200).json({status: 'false'});
-                        }
-                    }
-                }
-            );
-        } else {
-            res.status(500).json({status: 'error'});
-        }
+        isSession(req, res)
     });
 
     //Return all Sessions (Not neccesary)