Added important admin frontend functions with error handling, the corresponding api endpoints, and the timer logic

scoreboard/routes/admin.js

@@ -3,27 +3,45 @@ var router = express.Router();
 
 let timer = require('../controllers/timer');
 
-router.post('/timerStart', function(req, res, next) {
-  console.log("Timer gestartet");
-  timer.start()
-  res.render('admin');
+// Express router entpoint to start the timer
+router.get('/timerStart', function(req, res, next) {
+    if(timer.start()) {                     // If successfully started the timer
+        res.status(200);                    // Set http status code to 200 (success)
+        res.json(timer.getValues());        // Respond with all important values to update the frontend
+    } else {                                // If not successfull, for example because timer is already running or not time is left
+        res.status(406);                    // Set http status code to 406 (not acceptable)
+        res.send();                         // Respond with empty payload
+    }
 });
 
+// Express router endpoint to pause the timer
+router.get('/timerPause', function(req, res, next) {
+    if(timer.pause()) {                     // If successfully paused the timer
+        res.status(200);                    // Set http status code to 200 (success)
+        res.json(timer.getValues());        // Respond with all important values to update the frontend
+    } else {                                // If not successfull, for example if timer already is paused
+        res.status(406);                    // Set http status code to 406 (not acceptable)
+        res.send();                         // Respond with empty payload
+    }
+});
+
+// Express router endpoint to reset the timer
 router.post('/timerReset', function(req, res, next) {
-  console.log("Timer Zurückgesetzt");
-  timer.reset();
-  res.render('admin');
+    timer.reset(req.body.duration);         // Reset the timer with the duration in seconds received from the request
+    res.json(timer.getValues());            // Respond with all important values to update the frontend
+});
+
+// Express router endpoint to switch the score after halftime
+router.get('/timerGetValues', function(req, res, next) {
+    res.json(timer.getValues());            // Respond with important values for frontend
 });
 
-router.post('/timerPause', function(req, res, next) {
-  console.log("Timer pausiert");
-  timer.pause();
   res.render('admin');
 });
 
 /* GET home page. */
 router.get('/', function(req, res, next) {
-  res.render('admin', {});
+    res.render('admin');
 });