add admin panel

Co-authored-by: Jan-Marlon Leibl <jleibl@proton.me>
Reviewed-on: #20

src/Entity/Payment.php

@@ -2,6 +2,7 @@
 
 namespace App\Entity;
 
+use App\Enum\TicketData;
 use App\Repository\PaymentRepository;
 use Doctrine\ORM\Mapping as ORM;
 
@@ -63,4 +64,11 @@ class Payment
 
         return $this;
     }
+
+    public function getTotal(): float
+    {
+        return $this->customer->getTickets()->reduce(function (float $total, Ticket $ticket) {
+            return $total + TicketData::TICKET_DATA[$ticket->getType()]['price'];
+        }, 0);
+    }
 }