feat: promotional and purchase vouchers

src/BusProNet/DataProcessor/BookingDataProcessor.php

@@ -274,6 +274,17 @@ class BookingDataProcessor
         $this->buildServicesPayload($payload, $bookingData);
         $this->buildPickupPayload($payload, $bookingData);
 
+        // Add purchase vouchers if any exist
+        $purchaseVouchers = $this->collectPurchaseVouchers($formData);
+        if (false === empty($purchaseVouchers)) {
+            $payload['gutscheine']['gutschein'] = [];
+            foreach ($purchaseVouchers as $code) {
+                $payload['gutscheine']['gutschein'][] = [
+                    '@einloesecode' => $code,
+                ];
+            }
+        }
+
         return $payload;
     }
 
@@ -676,6 +687,11 @@ class BookingDataProcessor
                         $participantPayload['wünsche'] = $wishes;
                     }
                 }
+
+                // Add promo voucher if present
+                if (null !== $dto->promoVoucherCode && '' !== trim($dto->promoVoucherCode)) {
+                    $participantPayload['aktionscode'] = trim($dto->promoVoucherCode);
+                }
             }
 
             $payload['teilnehmerliste']['teilnehmer'][] = $participantPayload;
@@ -867,6 +883,11 @@ class BookingDataProcessor
                 }
             }
 
+            // Add promo voucher if present
+            if (null !== $participant->promoVoucherCode && '' !== trim($participant->promoVoucherCode)) {
+                $participantData['aktionscode'] = trim($participant->promoVoucherCode);
+            }
+
             $payload['teilnehmerliste']['teilnehmer'][] = $participantData;
         }
 
@@ -884,6 +905,17 @@ class BookingDataProcessor
         $this->addServicesFromMap($payload, 'zustiege', 'zustieg', '@idzustieg', $pickupMap);
         $this->addServicesFromMap($payload, 'versicherungen', 'versicherung', '@idversicherung', $insuranceMap);
 
+        // Add purchase vouchers if any exist
+        $purchaseVouchers = $this->collectPurchaseVouchers($bookingDto);
+        if (false === empty($purchaseVouchers)) {
+            $payload['gutscheine']['gutschein'] = [];
+            foreach ($purchaseVouchers as $code) {
+                $payload['gutscheine']['gutschein'][] = [
+                    '@einloesecode' => $code,
+                ];
+            }
+        }
+
         // Add payment information
         $payload['zahlung'] = [
             '@idzahlungsart' => Constants::PAYMENT_METHOD_DEBIT === $bookingDto->paymentMethod
@@ -1131,6 +1163,28 @@ class BookingDataProcessor
         return $insuranceMap;
     }
 
+    /**
+     * Collects all purchase vouchers from participants.
+     *
+     * Removes duplicates and empty values, returning unique redemption codes
+     * for aggregation into the <gutscheine> collection in the booking payload.
+     *
+     * @return string[] Array of unique redemption codes
+     */
+    private function collectPurchaseVouchers(BookingDto $bookingDto): array
+    {
+        $vouchers = [];
+
+        foreach ($bookingDto->participants as $participant) {
+            if (null !== $participant->purchaseVoucherCode && '' !== trim($participant->purchaseVoucherCode)) {
+                $vouchers[] = trim($participant->purchaseVoucherCode);
+            }
+        }
+
+        // Remove duplicates (in case multiple participants enter same code)
+        return array_unique($vouchers);
+    }
+
     /**
      * Applies bulk insurance assignment if the applicant has enabled it.
      *