fix: don't include default date of birth in contact form submissions

src/BusProNet/ApiClient.php

@@ -151,7 +151,7 @@ class ApiClient
             'key' => $this->createKey($this->config['bpn_username'], $this->config['bpn_password'], static::TYPE_CUSTOMER_DATA),
             'satz' => ['@typ' => static::TYPE_CUSTOMER_DATA],
             'art' => 'Adresse_Neu',
-            'adressdaten' => $personalData->toPayload(),
+            'adressdaten' => $personalData->toPayload(false),
             'ohnemailversand' => 'True',
         ];
 

src/BusProNet/Model/PersonalData.php

@@ -71,17 +71,11 @@ class PersonalData
      *
      * @return array<string, mixed> The payload array for API transmission
      */
-    public function toPayload(): array
+    public function toPayload(bool $includeDateOfBirth = true): array
     {
-        // Ensure date of birth is populated
-        if (null === $dob = $this->dateOfBirth) {
-            $dob = new \DateTimeImmutable(self::DEFAULT_AGE_YEARS.' years ago');
-        }
-
-        return [
+        $payload = [
             'idadresse' => $this->addressId,
             'idadresseperson' => $this->personId,
-            'geburtsdatum' => $dob->format('d.m.Y'),
             'anrede' => $this->salutation,
             'geschlecht' => $this->gender,
             'nationalitaet' => $this->nationality,
@@ -95,6 +89,13 @@ class PersonalData
             'sonstiges3' => $this->shoeSize,
             'bemerkung' => $this->remarks,
         ];
+
+        if (true === $includeDateOfBirth) {
+            $dob = $this->dateOfBirth ?? new \DateTimeImmutable(self::DEFAULT_AGE_YEARS . ' years ago');
+            $payload['geburtsdatum'] = $dob->format('d.m.Y');
+        }
+
+        return $payload;
     }
 
     public static function fromContactFormSubmission(ContactFormSubmission $dto): self