feat: implement payment step

src/Form/Model/BookingCreateDto.php

@@ -2,6 +2,7 @@
 
 namespace App\Form\Model;
 
+use App\BusProNet\Constants;
 use App\BusProNet\Model\Travel;
 use Symfony\Component\Validator\Constraints as Assert;
 use Symfony\Component\Validator\Context\ExecutionContextInterface;
@@ -22,6 +23,14 @@ class BookingCreateDto implements BookingDtoInterface
     #[Assert\Valid]
     public array $participants = [];
 
+    #[Assert\Choice(
+        choices: [Constants::PAYMENT_METHOD_TRANSFER, Constants::PAYMENT_METHOD_DEBIT],
+        message: 'Bitte wählen Sie eine gültige Zahlungsart.'
+    )]
+    public ?string $paymentMethod = Constants::PAYMENT_METHOD_TRANSFER;
+
+    public ?BankAccountDto $bankAccount = null;
+
     public function __construct(public Travel $travel, public int $hotelId)
     {
     }
@@ -95,4 +104,41 @@ class BookingCreateDto implements BookingDtoInterface
                 ->addViolation();
         }
     }
+
+    #[Assert\Callback]
+    public function validateBankAccount(ExecutionContextInterface $context): void
+    {
+        if (Constants::PAYMENT_METHOD_DEBIT !== $this->paymentMethod) {
+            return;
+        }
+
+        if (null === $this->bankAccount) {
+            $context->buildViolation('Bitte geben Sie Ihre Bankverbindung an.')
+                ->atPath('bankAccount')
+                ->addViolation();
+
+            return;
+        }
+
+        // Validate IBAN
+        if (null === $this->bankAccount->iban || '' === trim($this->bankAccount->iban)) {
+            $context->buildViolation('Bitte geben Sie Ihre IBAN ein.')
+                ->atPath('bankAccount.iban')
+                ->addViolation();
+        }
+
+        // Validate account holder
+        if (null === $this->bankAccount->accountHolder || '' === trim($this->bankAccount->accountHolder)) {
+            $context->buildViolation('Bitte geben Sie den Kontoinhaber ein.')
+                ->atPath('bankAccount.accountHolder')
+                ->addViolation();
+        }
+
+        // Validate SEPA mandate
+        if (false === $this->bankAccount->sepaMandateAccepted) {
+            $context->buildViolation('Bitte akzeptieren Sie das SEPA-Mandat.')
+                ->atPath('bankAccount.sepaMandateAccepted')
+                ->addViolation();
+        }
+    }
 }