feat: fold purchase and promo voucher fields into one code field

config/services.yaml

@@ -16,6 +16,12 @@ parameters:
     default_email_to: '%env(APP_DEFAULT_EMAIL_TO)%'
     accommodation_inquiry_email: '%env(ACCOMMODATION_INQUIRY_EMAIL)%'
     role_nomination_notification_emails: '%env(csv:APP_ROLE_NOMINATION_EMAILS)%'
+    # Promo codes issued before the "R-" prefix was introduced, with the last day each is recognised
+    # as a promo code (VoucherCodeClassifier). Remove this parameter and the classifier branch
+    # reading it once the last date has passed.
+    # TODO: replace the placeholder with the codes still active in BusPro (GutscheinAktion).
+    legacy_promo_voucher_codes:
+        PLACEHOLDER: '2027-04-30'
 
     # MailJet list ids and their labels
     mailjet_lists:
@@ -242,6 +248,10 @@ services:
             $cache: '@cache.app'
             $logger: '@monolog.logger.bpn'
 
+    App\Service\VoucherCodeClassifier:
+        arguments:
+            $legacyPromoCodes: '%legacy_promo_voucher_codes%'
+
     # Voucher purchase flow (/gutschein)
     App\Service\VoucherTemplateProvider:
         arguments:
@@ -265,8 +275,7 @@ services:
     App\Form\Service\ParticipantInsuranceFieldHandler: ~
     App\Form\Service\ParticipantBulkInsuranceFieldHandler: ~
     App\Form\Service\ParticipantTransportationDiscountReplacementFieldHandler: ~
-    App\Form\Service\ParticipantPurchaseVoucherFieldHandler: ~
-    App\Form\Service\ParticipantPromoVoucherFieldHandler: ~
+    App\Form\Service\ParticipantVoucherFieldHandler: ~
 
     # Participant Field Handler Registry - most handlers instantiate dependencies directly, some use services
     App\Form\Service\ParticipantFieldHandlerRegistry:
@@ -292,8 +301,7 @@ services:
                 - '@App\Form\Service\ParticipantTransportationDiscountReplacementFieldHandler'
                 - '@App\Form\Service\ParticipantBulkInsuranceFieldHandler'
                 - '@App\Form\Service\ParticipantInsuranceFieldHandler'
-                - '@App\Form\Service\ParticipantPurchaseVoucherFieldHandler'
-                - '@App\Form\Service\ParticipantPromoVoucherFieldHandler'
+                - '@App\Form\Service\ParticipantVoucherFieldHandler'
                 - '@App\Form\Service\ParticipantParkingFieldHandler'
 
     # Booking Status Rules

src/Enum/VoucherCodeKind.php

@@ -0,0 +1,22 @@
+<?php
+
+declare(strict_types=1);
+
+namespace App\Enum;
+
+/**
+ * What a code typed into the booking voucher field is, as far as its format tells.
+ *
+ * Kauf vs. Kulanz is not visible in the code; BusPro tells them apart when the purchase code is checked.
+ */
+enum VoucherCodeKind: string
+{
+    // Aktionsgutschein, checked with AKTIONSGUTSCHEIN and sent as the participant's <aktionscode>
+    case Promo = 'promo';
+
+    // Kauf- or Kulanzgutschein, checked with GUTSCHEINPRUEFUNGEINLOESUNG
+    case Purchase = 'purchase';
+
+    // Cannot be either, so it is rejected without asking BusPro
+    case Malformed = 'malformed';
+}

src/Form/BookingParticipantType.php

@@ -16,6 +16,7 @@ use Symfony\Component\Form\Extension\Core\Type\BirthdayType;
 use Symfony\Component\Form\Extension\Core\Type\CheckboxType;
 use Symfony\Component\Form\Extension\Core\Type\ChoiceType;
 use Symfony\Component\Form\Extension\Core\Type\EmailType;
+use Symfony\Component\Form\Extension\Core\Type\HiddenType;
 use Symfony\Component\Form\Extension\Core\Type\TextareaType;
 use Symfony\Component\Form\Extension\Core\Type\TextType;
 use Symfony\Component\Form\FormBuilderInterface;
@@ -334,8 +335,8 @@ class BookingParticipantType extends AbstractType
         if (BookingDto::MODE_CREATE === $bookingDto->getMode()) {
             $dynamicFields['bulkInsuranceBooking'] = CheckboxType::class;
             $dynamicFields['insurance'] = ChoiceType::class;
-            $dynamicFields['purchaseVoucherCode'] = TextType::class;
-            $dynamicFields['promoVoucherCode'] = TextType::class;
+            $dynamicFields['voucherCode'] = TextType::class;
+            $dynamicFields['removeVoucherCode'] = HiddenType::class;
         }
 
         foreach ($dynamicFields as $fieldName => $fieldType) {

src/Form/Model/ParticipantDto.php

@@ -48,8 +48,8 @@ class ParticipantDto
         'licensePlate',
         'bulkInsuranceBooking',
         'insurance',
-        'purchaseVoucherCode',
-        'promoVoucherCode',
+        'voucherCode',
+        'removeVoucherCode',
     ];
 
     public ?int $index = null;
@@ -163,47 +163,54 @@ class ParticipantDto
     public bool $bulkInsuranceBooking = false;
 
     /**
-     * Purchase voucher redemption code.
-     * Collected from all participants and aggregated into single <gutscheine> collection in booking payload.
+     * The voucher field as typed: a purchase or a promo code, told apart by VoucherCodeClassifier.
+     * ParticipantVoucherFieldHandler applies it and clears it; a rejected code stays for correction.
+     */
+    public ?string $voucherCode = null;
+
+    /**
+     * Why the typed voucher code was rejected. Kept on the DTO because the htmx refresh rebuilds
+     * the form from the DTO, which drops form errors; the Voucher constraint turns it into a violation.
+     */
+    public ?string $voucherCodeError = null;
+
+    /**
+     * Applied code the customer asked to remove. Consumed and reset by ParticipantVoucherFieldHandler.
+     */
+    public ?string $removeVoucherCode = null;
+
+    /**
+     * Applied purchase voucher redemption code (Kauf or Kulanz).
+     * Kauf codes are aggregated into the booking's <gutscheine>, a Kulanz code is sent as the participant's <einloesecode>.
      */
-    #[Assert\Length(
-        max: 50,
-        maxMessage: 'Der Gutscheincode darf maximal {{ limit }} Zeichen lang sein'
-    )]
-    #[Assert\Regex(
-        pattern: '/^[A-Za-z0-9\-]+$/',
-        message: 'Der Gutscheincode darf nur Buchstaben, Zahlen und Bindestriche enthalten'
-    )]
     public ?string $purchaseVoucherCode = null;
 
     /**
      * Validated purchase voucher from API.
-     * Set by ParticipantPurchaseVoucherFieldHandler during form processing.
+     * Set by ParticipantVoucherFieldHandler during form processing.
      * Contains voucher number, remaining balance, and type (Kauf/Kulanz).
      */
     public ?PurchaseVoucher $validatedPurchaseVoucher = null;
 
     /**
-     * Promo voucher code.
+     * Applied promo voucher code.
      * Applied per participant in booking payload as <aktionscode>.
      */
-    #[Assert\Length(
-        max: 50,
-        maxMessage: 'Der Aktionscode darf maximal {{ limit }} Zeichen lang sein'
-    )]
-    #[Assert\Regex(
-        pattern: '/^[A-Za-z0-9\-]+$/',
-        message: 'Der Aktionscode darf nur Buchstaben, Zahlen und Bindestriche enthalten'
-    )]
     public ?string $promoVoucherCode = null;
 
     /**
      * Validated promo voucher from API.
-     * Set by ParticipantPromoVoucherFieldHandler during form processing.
+     * Set by ParticipantVoucherFieldHandler during form processing.
      * Contains discount amount/percentage and applicability (per person/booking).
+     * Null while promoVoucherCode is set means BusPro rejected the applied code on a later check.
      */
     public ?PromoVoucher $validatedPromoVoucher = null;
 
+    /**
+     * Why BusPro rejected the applied promo code on a later check, e.g. the price fell below its threshold.
+     */
+    public ?string $promoVoucherError = null;
+
     /**
      * @var array<array{type: string, message: string}> Notification messages for user feedback
      */
@@ -345,8 +352,8 @@ class ParticipantDto
     /**
      * Checks if this participant has a goodwill (Kulanz) voucher.
      *
-     * Goodwill vouchers are treated as promotional vouchers in BPN XML
-     * (sent as <aktionscode> per participant, not in <gutscheine> collection).
+     * Goodwill vouchers are sent as the participant's <einloesecode>,
+     * not in the booking's <gutscheine> collection.
      */
     public function hasGoodwillVoucher(): bool
     {
@@ -425,6 +432,7 @@ class ParticipantDto
         $this->mobile = $this->normalizeNullableString($this->mobile);
         $this->remarksRoom = $this->normalizeNullableString($this->remarksRoom);
         $this->licensePlate = $this->normalizeNullableString($this->licensePlate);
+        $this->voucherCode = $this->normalizeNullableString($this->voucherCode);
         $this->purchaseVoucherCode = $this->normalizeNullableString($this->purchaseVoucherCode);
         $this->promoVoucherCode = $this->normalizeNullableString($this->promoVoucherCode);
 

src/Form/Model/ParticipantEditDto.php

@@ -18,8 +18,6 @@ use function Symfony\Component\String\u;
  * the participant being edited and the full booking context needed for
  * cross-participant validation.
  */
-#[AppAssert\PurchaseVoucher(groups: ['booking_create', 'booking_edit'])]
-#[AppAssert\PromoVoucher(groups: ['booking_create', 'booking_edit'])]
 #[AppAssert\MandatoryAdditionalServicesSelected(groups: ['booking_create', 'booking_edit'])]
 #[AppAssert\SkiPassSelection(groups: ['strict_required'])]
 class ParticipantEditDto
@@ -71,6 +69,29 @@ class ParticipantEditDto
         }
     }
 
+    /**
+     * Reports voucher codes BusPro rejected.
+     *
+     * ParticipantVoucherFieldHandler checks the codes with BusPro while handling the submission and
+     * keeps the outcome on the participant, since the htmx refresh rebuilds the form and drops form
+     * errors. This turns it into a violation so the step cannot be left with a rejected code.
+     */
+    #[Assert\Callback(groups: ['booking_create', 'booking_edit'])]
+    public function validateVoucherCodes(ExecutionContextInterface $context): void
+    {
+        if (null !== $this->participant->voucherCodeError) {
+            $context->buildViolation($this->participant->voucherCodeError)
+                ->atPath('participant.voucherCode')
+                ->addViolation();
+        }
+
+        if (null !== $this->participant->promoVoucherCode && null !== $this->participant->promoVoucherError) {
+            $context->buildViolation($this->participant->promoVoucherError)
+                ->atPath('participant.voucherCode')
+                ->addViolation();
+        }
+    }
+
     /**
      * Validates that non-applicant adult participants have unique email addresses.
      *

src/Form/Service/CreateFieldStateProvider.php

@@ -332,11 +332,11 @@ class CreateFieldStateProvider extends AbstractFieldStateProvider
         // Vouchers cannot be redeemed or submitted for inquiry bookings
         $finalBookingOnlyCondition = new FinalBookingOnlyCondition();
 
-        $this->fieldStateConditions['purchaseVoucherCode'] = [
+        $this->fieldStateConditions['voucherCode'] = [
             'hidden' => CompositeCondition::not($finalBookingOnlyCondition),
         ];
 
-        $this->fieldStateConditions['promoVoucherCode'] = [
+        $this->fieldStateConditions['removeVoucherCode'] = [
             'hidden' => CompositeCondition::not($finalBookingOnlyCondition),
         ];
 

src/Form/Service/ParticipantFieldHandlerRegistry.php

@@ -263,6 +263,9 @@ class ParticipantFieldHandlerRegistry
             'dropOff',
             'parking',
             'licensePlate',
+            // Cleared by the voucher handler once applied or removed; must not be bound again
+            'voucherCode',
+            'removeVoucherCode',
         ];
 
         foreach ($serviceFields as $fieldName) {

src/Form/Service/ParticipantFieldOptionsProvider.php

@@ -704,28 +704,22 @@ class ParticipantFieldOptionsProvider extends AbstractFieldOptionsProvider
             ];
         };
 
-        // Purchase voucher field provider - redemption code for vouchers that apply to complete booking
-        // Collected from all participants and aggregated into single <gutscheine> collection in booking payload
-        $this->fieldOptionProviders['purchaseVoucherCode'] = fn (BookingDto $bookingDto, int $participantIndex, array $options = []) => [
-            'label' => 'Gutschein-Code',
+        // Single voucher field - purchase (Kauf/Kulanz) or promo code, told apart by VoucherCodeClassifier.
+        // Applied by ParticipantVoucherFieldHandler, which moves accepted codes to purchaseVoucherCode/promoVoucherCode
+        $this->fieldOptionProviders['voucherCode'] = fn (BookingDto $bookingDto, int $participantIndex, array $options = []) => [
+            'label' => 'Gutschein- oder Aktionscode',
             'required' => false,
             'attr' => [
-                'placeholder' => 'z.B. 1F7V6PADRZ',
+                'placeholder' => 'z.B. 1F7V6PADRZ oder R-SOMMER',
                 'maxlength' => 50,
+                'autocomplete' => 'off',
             ],
             'sanitize_html' => true,
         ];
 
-        // Promo voucher field provider - promo code applied per participant in booking payload
-        // Included in participant XML node as <aktionscode>
-        $this->fieldOptionProviders['promoVoucherCode'] = fn (BookingDto $bookingDto, int $participantIndex, array $options = []) => [
-            'label' => 'Rabatt-Code',
+        // Applied voucher code to remove, set by the remove button of its chip
+        $this->fieldOptionProviders['removeVoucherCode'] = fn (BookingDto $bookingDto, int $participantIndex, array $options = []) => [
             'required' => false,
-            'attr' => [
-                'placeholder' => 'z.B. LW0705',
-                'maxlength' => 50,
-            ],
-            'sanitize_html' => true,
         ];
 
         // Future field providers would be added here, for example:

src/Form/Service/ParticipantPromoVoucherFieldHandler.php

@@ -1,93 +0,0 @@
-<?php
-
-declare(strict_types=1);
-
-namespace App\Form\Service;
-
-use App\Form\Model\BookingDto;
-use App\Form\Service\Abstract\AbstractParticipantFieldHandler;
-use App\Service\BookingPriceCalculator;
-use App\Service\VoucherValidator;
-
-/**
- * Handles promotional voucher code field processing.
- *
- * Validates promo codes via API and stores the validated voucher data
- * for early discount display. Validation is also performed by the
- * PromoVoucher constraint on ParticipantEditDto for form error feedback.
- *
- * Dependencies: ALL price-affecting fields (insurance, services, ski pass, rentals, etc.)
- * since promo validation requires accurate participant pricing.
- */
-class ParticipantPromoVoucherFieldHandler extends AbstractParticipantFieldHandler
-{
-    public function __construct(
-        private readonly VoucherValidator $voucherValidationService,
-        private readonly BookingPriceCalculator $priceCalculatorService,
-    ) {
-    }
-
-    public function getFieldName(): string
-    {
-        return 'promoVoucherCode';
-    }
-
-    public function getDependencies(): array
-    {
-        // CRITICAL: Must run after ALL price-affecting handlers to ensure accurate pricing
-        return [
-            'dateOfBirth',              // Required for age-based services
-            'skiPass',                  // Affects travel price
-            'rentals',                  // Affects travel price
-            'courses',                  // Affects travel price
-            'additionalServices',       // Affects travel price
-            'board',                    // Affects travel price
-            'transportationOutbound',   // Affects travel price
-            'transportationInbound',    // Affects travel price
-            'pickup',                   // Affects travel price
-            'parking',                  // Affects travel price
-            'insurance',                // Affects travel price (must be last)
-        ];
-    }
-
-    public function shouldProcess(array $submittedData, string $mode, int $participantIndex): bool
-    {
-        $promoCode = $this->getFieldValue($submittedData, $this->getFieldName());
-
-        return null !== $promoCode && '' !== trim($promoCode);
-    }
-
-    public function processField(array $submittedData, BookingDto $bookingDto, int $participantIndex): void
-    {
-        $participant = $this->getParticipant($bookingDto, $participantIndex);
-
-        if (null === $participant) {
-            return;
-        }
-
-        $promoCode = $this->getFieldValue($submittedData, $this->getFieldName());
-
-        // Clear validated voucher if code is empty
-        if (null === $promoCode || '' === trim($promoCode)) {
-            $participant->validatedPromoVoucher = null;
-
-            return;
-        }
-
-        // Calculate participant price for validation
-        $participantPrice = $this->priceCalculatorService->calculateIndividualParticipantPrice(
-            $bookingDto,
-            $participantIndex
-        );
-
-        // Validate promo voucher and store result
-        $result = $this->voucherValidationService->validatePromoVoucher(
-            trim($promoCode),
-            $bookingDto->travel->id,
-            $participantPrice
-        );
-
-        // Store validated voucher (null if invalid)
-        $participant->validatedPromoVoucher = $result->isValid ? $result->voucher : null;
-    }
-}

src/Form/Service/ParticipantPurchaseVoucherFieldHandler.php

@@ -1,68 +0,0 @@
-<?php
-
-declare(strict_types=1);
-
-namespace App\Form\Service;
-
-use App\Form\Model\BookingDto;
-use App\Form\Service\Abstract\AbstractParticipantFieldHandler;
-use App\Service\VoucherValidator;
-
-/**
- * Handles purchase voucher code field processing.
- *
- * Detects goodwill (Kulanz) vouchers and marks them for special XML handling.
- * Goodwill vouchers must be sent as <aktionscode> per participant, not aggregated
- * in <gutscheine> collection. Validation is performed by PurchaseVoucher constraint.
- *
- * Dependencies: None (purchase vouchers don't require price calculation)
- */
-class ParticipantPurchaseVoucherFieldHandler extends AbstractParticipantFieldHandler
-{
-    public function __construct(
-        private readonly VoucherValidator $voucherValidationService,
-    ) {
-    }
-
-    public function getFieldName(): string
-    {
-        return 'purchaseVoucherCode';
-    }
-
-    public function getDependencies(): array
-    {
-        // No dependencies - purchase vouchers don't require price calculation
-        return [];
-    }
-
-    public function shouldProcess(array $submittedData, string $mode, int $participantIndex): bool
-    {
-        $voucherCode = $this->getFieldValue($submittedData, $this->getFieldName());
-
-        return null !== $voucherCode && '' !== trim($voucherCode);
-    }
-
-    public function processField(array $submittedData, BookingDto $bookingDto, int $participantIndex): void
-    {
-        $participant = $this->getParticipant($bookingDto, $participantIndex);
-
-        if (null === $participant) {
-            return;
-        }
-
-        $voucherCode = $this->getFieldValue($submittedData, $this->getFieldName());
-
-        // Clear validated voucher if code is empty
-        if (null === $voucherCode || '' === trim($voucherCode)) {
-            $participant->validatedPurchaseVoucher = null;
-
-            return;
-        }
-
-        // Validate voucher and store result
-        $result = $this->voucherValidationService->validatePurchaseVoucher($voucherCode);
-
-        // Store validated voucher (null if invalid)
-        $participant->validatedPurchaseVoucher = $result->isValid ? $result->voucher : null;
-    }
-}

src/Form/Service/ParticipantVoucherFieldHandler.php

@@ -0,0 +1,221 @@
+<?php
+
+declare(strict_types=1);
+
+namespace App\Form\Service;
+
+use App\Enum\VoucherCodeKind;
+use App\Form\Model\BookingDto;
+use App\Form\Model\ParticipantDto;
+use App\Form\Service\Abstract\AbstractParticipantFieldHandler;
+use App\Service\BookingPriceCalculator;
+use App\Service\VoucherCodeClassifier;
+use App\Service\VoucherValidator;
+
+/**
+ * Handles the single voucher field of the booking create flow.
+ *
+ * The typed code is classified as promo or purchase code (VoucherCodeClassifier), checked with
+ * BusPro and, when accepted, moved into promoVoucherCode or purchaseVoucherCode, which the payload
+ * builder reads. The field is then cleared; a rejected code stays with its reason in voucherCodeError.
+ * A participant holds at most one code of each kind.
+ *
+ * Runs on every create-mode submission, also without a typed code, because an applied promo code
+ * is checked against the participant price, which may have changed since it was applied.
+ *
+ * Dependencies: ALL price-affecting fields (insurance, services, ski pass, rentals, etc.)
+ * since promo validation requires accurate participant pricing.
+ */
+class ParticipantVoucherFieldHandler extends AbstractParticipantFieldHandler
+{
+    public function __construct(
+        private readonly VoucherValidator $voucherValidationService,
+        private readonly BookingPriceCalculator $priceCalculatorService,
+        private readonly VoucherCodeClassifier $voucherCodeClassifier,
+    ) {
+    }
+
+    public function getFieldName(): string
+    {
+        return 'voucherCode';
+    }
+
+    public function getDependencies(): array
+    {
+        // CRITICAL: Must run after ALL price-affecting handlers to ensure accurate pricing
+        return [
+            'dateOfBirth',              // Required for age-based services
+            'skiPass',                  // Affects travel price
+            'rentals',                  // Affects travel price
+            'courses',                  // Affects travel price
+            'additionalServices',       // Affects travel price
+            'board',                    // Affects travel price
+            'transportationOutbound',   // Affects travel price
+            'transportationInbound',    // Affects travel price
+            'pickup',                   // Affects travel price
+            'parking',                  // Affects travel price
+            'insurance',                // Affects travel price (must be last)
+        ];
+    }
+
+    public function shouldProcess(array $submittedData, string $mode, int $participantIndex): bool
+    {
+        // Vouchers can only be redeemed when creating a booking
+        return BookingDto::MODE_CREATE === $mode;
+    }
+
+    public function processField(array $submittedData, BookingDto $bookingDto, int $participantIndex): void
+    {
+        $participant = $this->getParticipant($bookingDto, $participantIndex);
+
+        if (!$participant instanceof ParticipantDto) {
+            return;
+        }
+
+        $this->removeRequestedCode($submittedData, $participant);
+        $this->recheckAppliedPromoCode($bookingDto, $participant, $participantIndex);
+        $this->applyTypedCode($submittedData, $bookingDto, $participant, $participantIndex);
+    }
+
+    /**
+     * @param array<string, mixed> $submittedData
+     */
+    private function removeRequestedCode(array $submittedData, ParticipantDto $participant): void
+    {
+        $participant->removeVoucherCode = null;
+
+        $code = $this->getFieldValue($submittedData, 'removeVoucherCode');
+        if (false === is_string($code) || '' === trim($code)) {
+            return;
+        }
+
+        $code = $this->voucherCodeClassifier->normalize($code);
+
+        if ($code === $participant->promoVoucherCode) {
+            $participant->promoVoucherCode = null;
+            $participant->validatedPromoVoucher = null;
+            $participant->promoVoucherError = null;
+        }
+
+        if ($code === $participant->purchaseVoucherCode) {
+            $participant->purchaseVoucherCode = null;
+            $participant->validatedPurchaseVoucher = null;
+        }
+    }
+
+    private function recheckAppliedPromoCode(BookingDto $bookingDto, ParticipantDto $participant, int $participantIndex): void
+    {
+        if (null === $participant->promoVoucherCode) {
+            return;
+        }
+
+        $error = $this->validatePromoCode($participant->promoVoucherCode, $bookingDto, $participant, $participantIndex);
+        $participant->promoVoucherError = $error;
+    }
+
+    /**
+     * @param array<string, mixed> $submittedData
+     */
+    private function applyTypedCode(array $submittedData, BookingDto $bookingDto, ParticipantDto $participant, int $participantIndex): void
+    {
+        $participant->voucherCodeError = null;
+
+        // Only a submitted field carries a typed code; when the field is hidden nothing may linger
+        $typedCode = $this->getFieldValue($submittedData, $this->getFieldName());
+        if (false === is_string($typedCode) || '' === trim($typedCode)) {
+            $participant->voucherCode = null;
+
+            return;
+        }
+
+        $participant->voucherCode = trim($typedCode);
+        $code = $this->voucherCodeClassifier->normalize($typedCode);
+
+        $error = match (true) {
+            $code === $participant->promoVoucherCode, $code === $participant->purchaseVoucherCode => 'Dieser Code ist bereits eingelöst.',
+            default => match ($this->voucherCodeClassifier->classify($code)) {
+                VoucherCodeKind::Malformed => 'Dieser Code ist ungültig. Bitte prüfe deine Eingabe.',
+                VoucherCodeKind::Promo => $this->applyPromoCode($code, $bookingDto, $participant, $participantIndex),
+                VoucherCodeKind::Purchase => $this->applyPurchaseCode($code, $participant),
+            },
+        };
+
+        if (null === $error) {
+            $participant->voucherCode = null;
+        }
+
+        $participant->voucherCodeError = $error;
+    }
+
+    /**
+     * @return string|null Why the code was not applied, or null when it was
+     */
+    private function applyPromoCode(string $code, BookingDto $bookingDto, ParticipantDto $participant, int $participantIndex): ?string
+    {
+        if (null !== $participant->promoVoucherCode) {
+            return sprintf('Es kann nur ein Aktionscode eingelöst werden. Bitte entferne zuerst %s.', $participant->promoVoucherCode);
+        }
+
+        $error = $this->validatePromoCode($code, $bookingDto, $participant, $participantIndex);
+        if (null !== $error) {
+            return $error;
+        }
+
+        $participant->promoVoucherCode = $code;
+        $participant->promoVoucherError = null;
+
+        return null;
+    }
+
+    /**
+     * @return string|null Why the code was not applied, or null when it was
+     */
+    private function applyPurchaseCode(string $code, ParticipantDto $participant): ?string
+    {
+        if (null !== $participant->purchaseVoucherCode) {
+            return sprintf('Es kann nur ein Gutschein eingelöst werden. Bitte entferne zuerst %s.', $participant->purchaseVoucherCode);
+        }
+
+        $result = $this->voucherValidationService->validatePurchaseVoucher($code);
+        if (false === $result->isValid) {
+            return sprintf('Gutschein ungültig: %s', $result->errorMessage ?? 'Unbekannter Fehler');
+        }
+
+        $participant->purchaseVoucherCode = $code;
+        $participant->validatedPurchaseVoucher = $result->voucher;
+
+        return null;
+    }
+
+    /**
+     * Checks a promo code against the participant's current price and stores the validated voucher.
+     *
+     * @return string|null Why BusPro rejected the code, or null when it is valid
+     */
+    private function validatePromoCode(string $code, BookingDto $bookingDto, ParticipantDto $participant, int $participantIndex): ?string
+    {
+        $travelId = $bookingDto->travel->id;
+        if (null === $travelId) {
+            $participant->validatedPromoVoucher = null;
+
+            return 'Aktionscode konnte nicht validiert werden: Reise-ID fehlt.';
+        }
+
+        $participantPrice = $this->priceCalculatorService->calculateIndividualParticipantPrice($bookingDto, $participantIndex);
+
+        $result = $this->voucherValidationService->validatePromoVoucher($code, $travelId, $participantPrice);
+
+        if (false === $result->isValid) {
+            // Only an applied code is replaced: a rejected new code must not discard the applied one's discount
+            if ($code === $participant->promoVoucherCode) {
+                $participant->validatedPromoVoucher = null;
+            }
+
+            return sprintf('Aktionscode ungültig: %s', $result->errorMessage ?? 'Unbekannter Fehler');
+        }
+
+        $participant->validatedPromoVoucher = $result->voucher;
+
+        return null;
+    }
+}

src/Service/VoucherCodeClassifier.php

@@ -0,0 +1,69 @@
+<?php
+
+declare(strict_types=1);
+
+namespace App\Service;
+
+use App\Enum\VoucherCodeKind;
+
+/**
+ * Tells promo codes and purchase codes apart, so the booking form needs only one voucher field.
+ *
+ * Promo codes are prefixed "R-". Purchase codes (Kauf and Kulanz) consist of uppercase letters only
+ * and never contain a hyphen, so the prefix cannot collide with them. Promo codes issued before the
+ * prefix was introduced are recognised from `legacy_promo_voucher_codes` until their date has passed.
+ */
+class VoucherCodeClassifier
+{
+    public const PROMO_PREFIX = 'R-';
+
+    private const MAX_LENGTH = 50;
+
+    /** @var array<string, \DateTimeImmutable> Normalised code => last day the code is recognised */
+    private readonly array $legacyPromoCodes;
+
+    /**
+     * @param array<string, string> $legacyPromoCodes Code => last day it is accepted (Y-m-d)
+     */
+    public function __construct(array $legacyPromoCodes = [])
+    {
+        $codes = [];
+        foreach ($legacyPromoCodes as $code => $lastDay) {
+            $codes[$this->normalize((string) $code)] = new \DateTimeImmutable($lastDay);
+        }
+
+        $this->legacyPromoCodes = $codes;
+    }
+
+    /**
+     * Codes are matched case-insensitively; BusPro receives them in uppercase.
+     */
+    public function normalize(string $code): string
+    {
+        return mb_strtoupper(trim($code));
+    }
+
+    public function classify(string $code, \DateTimeImmutable $today = new \DateTimeImmutable('today')): VoucherCodeKind
+    {
+        $code = $this->normalize($code);
+
+        if ('' === $code || mb_strlen($code) > self::MAX_LENGTH || 1 !== preg_match('/^[A-Z0-9\-]+$/', $code)) {
+            return VoucherCodeKind::Malformed;
+        }
+
+        if (str_starts_with($code, self::PROMO_PREFIX)) {
+            return VoucherCodeKind::Promo;
+        }
+
+        $lastDay = $this->legacyPromoCodes[$code] ?? null;
+        if (null !== $lastDay && $lastDay >= $today) {
+            return VoucherCodeKind::Promo;
+        }
+
+        if (str_contains($code, '-')) {
+            return VoucherCodeKind::Malformed;
+        }
+
+        return VoucherCodeKind::Purchase;
+    }
+}

src/Validator/Constraints/PromoVoucher.php

@@ -1,25 +0,0 @@
-<?php
-
-declare(strict_types=1);
-
-namespace App\Validator\Constraints;
-
-use Symfony\Component\Validator\Constraint;
-
-/**
- * Validates promotional voucher codes via BPN API.
- *
- * Checks code validity, travel applicability, and minimum price threshold.
- * Requires participant pricing calculation and travel context.
- * Applied at ParticipantEditDto level to access booking context.
- */
-#[\Attribute]
-class PromoVoucher extends Constraint
-{
-    public string $message = 'Aktionscode ungültig: {{ error }}';
-
-    public function getTargets(): array|string
-    {
-        return static::CLASS_CONSTRAINT;
-    }
-}

src/Validator/Constraints/PromoVoucherValidator.php

@@ -1,78 +0,0 @@
-<?php
-
-declare(strict_types=1);
-
-namespace App\Validator\Constraints;
-
-use App\Form\Model\ParticipantEditDto;
-use App\Service\BookingPriceCalculator;
-use App\Service\VoucherValidator;
-use Symfony\Component\Validator\Constraint;
-use Symfony\Component\Validator\ConstraintValidator;
-use Symfony\Component\Validator\Exception\UnexpectedTypeException;
-
-/**
- * Validates promotional voucher codes against the BPN API.
- *
- * Verifies that promo codes are valid for the current travel, checks minimum price
- * thresholds, and validates code availability. Uses the participant's calculated
- * total price (including room and all selected services) for threshold comparison.
- */
-class PromoVoucherValidator extends ConstraintValidator
-{
-    public function __construct(
-        private readonly VoucherValidator $voucherValidationService,
-        private readonly BookingPriceCalculator $priceCalculatorService,
-    ) {
-    }
-
-    public function validate(mixed $value, Constraint $constraint): void
-    {
-        if (!$constraint instanceof PromoVoucher) {
-            throw new UnexpectedTypeException($constraint, PromoVoucher::class);
-        }
-
-        if (!$value instanceof ParticipantEditDto) {
-            throw new UnexpectedTypeException($value, ParticipantEditDto::class);
-        }
-
-        $promoCode = $value->participant->promoVoucherCode;
-
-        // Skip validation if promo code is empty
-        if (null === $promoCode || '' === trim($promoCode)) {
-            return;
-        }
-
-        // Get travel ID from booking context
-        $travelId = $value->bookingContext->travel->id;
-
-        if (null === $travelId) {
-            $this->context->buildViolation('Aktionscode konnte nicht validiert werden: Reise-ID fehlt.')
-                ->atPath('participant.promoVoucherCode')
-                ->addViolation();
-
-            return;
-        }
-
-        // Calculate participant's current price including all services
-        $participantPrice = $this->priceCalculatorService->calculateIndividualParticipantPrice(
-            $value->bookingContext,
-            $value->participant->index ?? 0
-        );
-
-        // Validate promo voucher via API
-        $result = $this->voucherValidationService->validatePromoVoucher(
-            $promoCode,
-            $travelId,
-            $participantPrice
-        );
-
-        // Add violation if voucher is invalid
-        if (false === $result->isValid) {
-            $this->context->buildViolation($constraint->message)
-                ->setParameter('{{ error }}', $result->errorMessage ?? 'Unbekannter Fehler')
-                ->atPath('participant.promoVoucherCode')
-                ->addViolation();
-        }
-    }
-}

src/Validator/Constraints/PurchaseVoucher.php

@@ -1,24 +0,0 @@
-<?php
-
-declare(strict_types=1);
-
-namespace App\Validator\Constraints;
-
-use Symfony\Component\Validator\Constraint;
-
-/**
- * Validates purchase voucher codes via BPN API.
- *
- * Checks that the voucher exists and has remaining balance.
- * Applied at ParticipantEditDto level to access booking context.
- */
-#[\Attribute]
-class PurchaseVoucher extends Constraint
-{
-    public string $message = 'Gutschein ungültig: {{ error }}';
-
-    public function getTargets(): array|string
-    {
-        return static::CLASS_CONSTRAINT;
-    }
-}

src/Validator/Constraints/PurchaseVoucherValidator.php

@@ -1,54 +0,0 @@
-<?php
-
-declare(strict_types=1);
-
-namespace App\Validator\Constraints;
-
-use App\Form\Model\ParticipantEditDto;
-use App\Service\VoucherValidator;
-use Symfony\Component\Validator\Constraint;
-use Symfony\Component\Validator\ConstraintValidator;
-use Symfony\Component\Validator\Exception\UnexpectedTypeException;
-
-/**
- * Validates purchase voucher codes against the BPN API.
- *
- * Verifies that voucher codes exist and have remaining balance. Unlike promo
- * vouchers, purchase vouchers do not require travel or price context validation.
- */
-class PurchaseVoucherValidator extends ConstraintValidator
-{
-    public function __construct(
-        private readonly VoucherValidator $voucherValidationService,
-    ) {
-    }
-
-    public function validate(mixed $value, Constraint $constraint): void
-    {
-        if (!$constraint instanceof PurchaseVoucher) {
-            throw new UnexpectedTypeException($constraint, PurchaseVoucher::class);
-        }
-
-        if (!$value instanceof ParticipantEditDto) {
-            throw new UnexpectedTypeException($value, ParticipantEditDto::class);
-        }
-
-        $voucherCode = $value->participant->purchaseVoucherCode;
-
-        // Skip validation if voucher code is empty
-        if (null === $voucherCode || '' === trim($voucherCode)) {
-            return;
-        }
-
-        // Validate voucher via API
-        $result = $this->voucherValidationService->validatePurchaseVoucher($voucherCode);
-
-        // Add violation if voucher is invalid
-        if (false === $result->isValid) {
-            $this->context->buildViolation($constraint->message)
-                ->setParameter('{{ error }}', $result->errorMessage ?? 'Unbekannter Fehler')
-                ->atPath('participant.purchaseVoucherCode')
-                ->addViolation();
-        }
-    }
-}

templates/booking/_participant_form.html.twig

@@ -684,19 +684,84 @@
             {% endif %}
         {% endif %}
 
-        {# Voucher fields - available for all participants regardless of eligibility #}
-        {% if form.purchaseVoucherCode is defined or form.promoVoucherCode is defined %}
+        {# Voucher field - available for all participants regardless of eligibility #}
+        {% if form.voucherCode is defined %}
+            {% set voucherParticipant = form.vars.data.participant %}
+            {% set voucherHx = {
+                'hx-post': path(refreshRouteName, refreshRouteParams|default({index: participantIndex})),
+                'hx-target': '#main-content',
+                'hx-swap': 'innerHTML'
+            } %}
             <h3 class="font-semibold text-lg mb-4">
                 Gutscheine
             </h3>
-            <div class="grid lg:grid-cols-2 lg:gap-x-4">
-                {% if form.purchaseVoucherCode is defined %}
-                    {{ form_row(form.purchaseVoucherCode) }}
+            <div class="mb-4">
+                {{ form_label(form.voucherCode) }}
+                <div class="flex items-center gap-2">
+                    <div class="grow">
+                        {{ form_widget(form.voucherCode) }}
+                    </div>
+                    <button type="button" class="button button--secondary"
+                        {% for name, value in voucherHx %} {{ name }}="{{ value }}"{% endfor %}>
+                        Code einlösen
+                    </button>
+                </div>
+                {# A full submit carries the error as a violation; the htmx refresh rebuilds the form, so read it from the DTO #}
+                {% if form.voucherCode.vars.errors|length > 0 %}
+                    {{ form_errors(form.voucherCode) }}
+                {% elseif voucherParticipant.voucherCodeError %}
+                    <ul class="pb-2 px-2">
+                        <li class="text-red-500">{{ voucherParticipant.voucherCodeError }}</li>
+                    </ul>
                 {% endif %}
-                {% if form.promoVoucherCode is defined %}
-                    {{ form_row(form.promoVoucherCode) }}
+
+                {% set appliedVouchers = [] %}
+                {% if voucherParticipant.purchaseVoucherCode %}
+                    {% set purchaseVoucher = voucherParticipant.validatedPurchaseVoucher %}
+                    {% set appliedVouchers = appliedVouchers|merge([{
+                        code: voucherParticipant.purchaseVoucherCode,
+                        label: purchaseVoucher and purchaseVoucher.goodwill ? 'Kulanzgutschein' : 'Kaufgutschein',
+                        value: purchaseVoucher ? purchaseVoucher.remainingBalance|format_currency('EUR') : null,
+                        error: null
+                    }]) %}
+                {% endif %}
+                {% if voucherParticipant.promoVoucherCode %}
+                    {% set promoVoucher = voucherParticipant.validatedPromoVoucher %}
+                    {% set appliedVouchers = appliedVouchers|merge([{
+                        code: voucherParticipant.promoVoucherCode,
+                        label: 'Aktionsgutschein',
+                        value: promoVoucher ? (promoVoucher.discountPercentage > 0 ? promoVoucher.discountPercentage ~ ' %' : promoVoucher.discountAmount|format_currency('EUR')) : null,
+                        error: voucherParticipant.promoVoucherError
+                    }]) %}
+                {% endif %}
+
+                {% if appliedVouchers is not empty %}
+                    <ul class="flex flex-wrap gap-2 mt-2">
+                        {% for voucher in appliedVouchers %}
+                            <li class="{{ html_classes('flex items-center gap-2 border px-2 py-1', {
+                                'border-primary-bg': not voucher.error,
+                                'border-red-500': voucher.error
+                            }) }}">
+                                <span>
+                                    {{ voucher.label }} {{ voucher.code }}{% if voucher.value %}: {{ voucher.value }}{% endif %}
+                                    {% if voucher.error %}
+                                        <span class="block text-sm text-red-500">{{ voucher.error }}</span>
+                                    {% endif %}
+                                </span>
+                                <button type="button" class="text-sm text-primary-light" aria-label="{{ voucher.code }} entfernen"
+                                    hx-vals="{{ {(form.removeVoucherCode.vars.full_name): voucher.code}|json_encode }}"
+                                    {% for name, value in voucherHx %} {{ name }}="{{ value }}"{% endfor %}>
+                                    Entfernen
+                                </button>
+                            </li>
+                        {% endfor %}
+                    </ul>
                 {% endif %}
             </div>
+            {# Submitted through the remove buttons' hx-vals, never as an input of its own #}
+            {% if form.removeVoucherCode is defined %}
+                {% do form.removeVoucherCode.setRendered() %}
+            {% endif %}
         {% endif %}
     </div>
 {% endblock %}

tests/Form/Model/ParticipantEditDtoTest.php

@@ -16,13 +16,9 @@ use App\Form\Model\BookingDto;
 use App\Form\Model\ParticipantDto;
 use App\Form\Model\ParticipantEditDto;
 use App\Form\Service\ServiceAgeEvaluator;
-use App\Service\BookingPriceCalculator;
 use App\Service\ParticipantEligibilityChecker;
 use App\Service\ServiceAvailabilityCalculator;
-use App\Service\VoucherValidator;
 use App\Validator\Constraints\MandatoryAdditionalServicesSelectedValidator;
-use App\Validator\Constraints\PromoVoucherValidator;
-use App\Validator\Constraints\PurchaseVoucherValidator;
 use App\Validator\Constraints\SkiPassSelectionValidator;
 use PHPUnit\Framework\TestCase;
 use Symfony\Component\Validator\Constraint;
@@ -48,8 +44,6 @@ class ParticipantEditDtoTest extends TestCase
     protected function setUp(): void
     {
         // Create mock services for validator dependencies
-        $mockVoucherService = $this->createStub(VoucherValidator::class);
-        $mockPriceCalculatorService = $this->createStub(BookingPriceCalculator::class);
         $mockParticipantEligibilityChecker = $this->createStub(ParticipantEligibilityChecker::class);
         $mockServiceAgeEvaluator = $this->createStub(ServiceAgeEvaluator::class);
 
@@ -61,10 +55,8 @@ class ParticipantEditDtoTest extends TestCase
         );
 
         // Create custom validator factory that can inject dependencies
-        $validatorFactory = new class($mockVoucherService, $mockPriceCalculatorService, $mockParticipantEligibilityChecker, $mockServiceAgeEvaluator, $participantEligibilityChecker) implements ConstraintValidatorFactoryInterface {
+        $validatorFactory = new class($mockParticipantEligibilityChecker, $mockServiceAgeEvaluator, $participantEligibilityChecker) implements ConstraintValidatorFactoryInterface {
             public function __construct(
-                private readonly VoucherValidator $voucherService,
-                private readonly BookingPriceCalculator $priceCalculatorService,
                 private readonly ParticipantEligibilityChecker $participantEligibilityService,
                 private readonly ServiceAgeEvaluator $serviceAgeEvaluator,
                 private readonly ParticipantEligibilityChecker $realEligibilityChecker,
@@ -75,14 +67,6 @@ class ParticipantEditDtoTest extends TestCase
             {
                 $className = $constraint->validatedBy();
 
-                if (PurchaseVoucherValidator::class === $className) {
-                    return new PurchaseVoucherValidator($this->voucherService);
-                }
-
-                if (PromoVoucherValidator::class === $className) {
-                    return new PromoVoucherValidator($this->voucherService, $this->priceCalculatorService);
-                }
-
                 if (EmailValidator::class === $className) {
                     return new EmailValidator(Email::VALIDATION_MODE_HTML5);
                 }
@@ -125,6 +109,42 @@ class ParticipantEditDtoTest extends TestCase
         $this->assertCount(0, $violations);
     }
 
+    public function testRejectedVoucherCodeFailsValidation(): void
+    {
+        $bookingDto = $this->createBookingDtoWithParticipants([
+            $this->createValidAdultParticipant('[email protected]'),
+        ]);
+        $bookingDto->participants[0]->voucherCodeError = 'Gutschein ungültig: Gutschein nicht gefunden';
+
+        $violations = $this->validator->validate(
+            new ParticipantEditDto(participant: $bookingDto->participants[0], bookingContext: $bookingDto),
+            null,
+            ['booking_create']
+        );
+
+        $this->assertCount(1, $violations);
+        $this->assertSame('participant.voucherCode', $violations->get(0)->getPropertyPath());
+        $this->assertSame('Gutschein ungültig: Gutschein nicht gefunden', $violations->get(0)->getMessage());
+    }
+
+    public function testAppliedPromoCodeRejectedOnRecheckFailsValidation(): void
+    {
+        $bookingDto = $this->createBookingDtoWithParticipants([
+            $this->createValidAdultParticipant('[email protected]'),
+        ]);
+        $bookingDto->participants[0]->promoVoucherCode = 'R-SOMMER26';
+        $bookingDto->participants[0]->promoVoucherError = 'Aktionscode ungültig: Mindestpreis nicht erreicht';
+
+        $violations = $this->validator->validate(
+            new ParticipantEditDto(participant: $bookingDto->participants[0], bookingContext: $bookingDto),
+            null,
+            ['booking_create']
+        );
+
+        $this->assertCount(1, $violations);
+        $this->assertSame('participant.voucherCode', $violations->get(0)->getPropertyPath());
+    }
+
     public function testAdultWithDuplicateEmailFailsValidation(): void
     {
         $bookingDto = $this->createBookingDtoWithParticipants([

tests/Form/Service/ParticipantVoucherFieldHandlerTest.php

@@ -0,0 +1,237 @@
+<?php
+
+declare(strict_types=1);
+
+namespace App\Tests\Form\Service;
+
+use App\BusProNet\Model\PromoVoucher;
+use App\BusProNet\Model\PromoVoucherValidationResult;
+use App\BusProNet\Model\PurchaseVoucher;
+use App\BusProNet\Model\PurchaseVoucherValidationResult;
+use App\BusProNet\Model\Travel;
+use App\Form\Model\BookingDto;
+use App\Form\Model\ParticipantDto;
+use App\Form\Service\ParticipantVoucherFieldHandler;
+use App\Service\BookingPriceCalculator;
+use App\Service\VoucherCodeClassifier;
+use App\Service\VoucherValidator;
+use PHPUnit\Framework\MockObject\Stub;
+use PHPUnit\Framework\TestCase;
+
+class ParticipantVoucherFieldHandlerTest extends TestCase
+{
+    private VoucherValidator&Stub $voucherValidator;
+    private BookingDto $bookingDto;
+    private ParticipantDto $participant;
+
+    protected function setUp(): void
+    {
+        $this->voucherValidator = $this->createStub(VoucherValidator::class);
+
+        $travel = new Travel();
+        $travel->id = 12500;
+
+        $this->participant = new ParticipantDto();
+        $this->participant->index = 0;
+
+        $this->bookingDto = new BookingDto($travel, 1);
+        $this->bookingDto->participants = [$this->participant];
+    }
+
+    private function handler(?VoucherValidator $voucherValidator = null): ParticipantVoucherFieldHandler
+    {
+        $priceCalculator = $this->createStub(BookingPriceCalculator::class);
+        $priceCalculator->method('calculateIndividualParticipantPrice')->willReturn(500.0);
+
+        return new ParticipantVoucherFieldHandler(
+            $voucherValidator ?? $this->voucherValidator,
+            $priceCalculator,
+            new VoucherCodeClassifier(['LW0705' => '2099-12-31']),
+        );
+    }
+
+    private static function promoVoucher(string $code): PromoVoucher
+    {
+        return new PromoVoucher($code, 'Aktion', PromoVoucher::APPLICABILITY_PER_PERSON, 50.0, 0.0, 0.0);
+    }
+
+    private static function purchaseVoucher(string $code, string $type = PurchaseVoucher::TYPE_PURCHASE): PurchaseVoucher
+    {
+        return new PurchaseVoucher('80190', $code, 1, 100.0, $type);
+    }
+
+    public function testRunsOnlyInCreateMode(): void
+    {
+        self::assertTrue($this->handler()->shouldProcess([], BookingDto::MODE_CREATE, 0));
+        self::assertFalse($this->handler()->shouldProcess([], BookingDto::MODE_EDIT, 0));
+    }
+
+    public function testAppliesPrefixedPromoCodeAndClearsTheField(): void
+    {
+        $voucher = self::promoVoucher('R-SOMMER26');
+        $this->voucherValidator->method('validatePromoVoucher')
+            ->willReturn(new PromoVoucherValidationResult(isValid: true, voucher: $voucher));
+
+        $this->handler()->processField(['voucherCode' => ' r-sommer26 '], $this->bookingDto, 0);
+
+        self::assertSame('R-SOMMER26', $this->participant->promoVoucherCode);
+        self::assertSame($voucher, $this->participant->validatedPromoVoucher);
+        self::assertNull($this->participant->voucherCode);
+        self::assertNull($this->participant->voucherCodeError);
+        self::assertNull($this->participant->purchaseVoucherCode);
+    }
+
+    public function testAppliesLegacyPromoCodeAsPromo(): void
+    {
+        $voucherValidator = $this->createMock(VoucherValidator::class);
+        $voucherValidator->expects(self::once())->method('validatePromoVoucher')
+            ->with('LW0705', 12500, 500.0)
+            ->willReturn(new PromoVoucherValidationResult(isValid: true, voucher: self::promoVoucher('LW0705')));
+        $voucherValidator->expects(self::never())->method('validatePurchaseVoucher');
+
+        $this->handler($voucherValidator)->processField(['voucherCode' => 'lw0705'], $this->bookingDto, 0);
+
+        self::assertSame('LW0705', $this->participant->promoVoucherCode);
+    }
+
+    public function testAppliesPurchaseCode(): void
+    {
+        $voucher = self::purchaseVoucher('1F7V6PADRZ');
+        $this->voucherValidator->method('validatePurchaseVoucher')
+            ->willReturn(new PurchaseVoucherValidationResult(isValid: true, voucher: $voucher));
+
+        $this->handler()->processField(['voucherCode' => '1f7v6padrz'], $this->bookingDto, 0);
+
+        self::assertSame('1F7V6PADRZ', $this->participant->purchaseVoucherCode);
+        self::assertSame($voucher, $this->participant->validatedPurchaseVoucher);
+        self::assertNull($this->participant->voucherCode);
+        self::assertFalse($this->participant->hasGoodwillVoucher());
+    }
+
+    public function testAppliesGoodwillCodeAsPurchaseCode(): void
+    {
+        $this->voucherValidator->method('validatePurchaseVoucher')
+            ->willReturn(new PurchaseVoucherValidationResult(isValid: true, voucher: self::purchaseVoucher('KULANZ', PurchaseVoucher::TYPE_GOODWILL)));
+
+        $this->handler()->processField(['voucherCode' => 'KULANZ'], $this->bookingDto, 0);
+
+        self::assertSame('KULANZ', $this->participant->purchaseVoucherCode);
+        self::assertTrue($this->participant->hasGoodwillVoucher());
+    }
+
+    public function testRejectedCodeStaysInTheFieldWithBusProsReason(): void
+    {
+        $this->voucherValidator->method('validatePurchaseVoucher')
+            ->willReturn(new PurchaseVoucherValidationResult(isValid: false, errorMessage: 'Gutschein nicht gefunden'));
+
+        $this->handler()->processField(['voucherCode' => 'abcdef'], $this->bookingDto, 0);
+
+        self::assertSame('abcdef', $this->participant->voucherCode);
+        self::assertSame('Gutschein ungültig: Gutschein nicht gefunden', $this->participant->voucherCodeError);
+        self::assertNull($this->participant->purchaseVoucherCode);
+    }
+
+    public function testMalformedCodeIsRejectedWithoutAskingBusPro(): void
+    {
+        $voucherValidator = $this->createMock(VoucherValidator::class);
+        $voucherValidator->expects(self::never())->method('validatePurchaseVoucher');
+        $voucherValidator->expects(self::never())->method('validatePromoVoucher');
+
+        $this->handler($voucherValidator)->processField(['voucherCode' => 'X-123'], $this->bookingDto, 0);
+
+        self::assertSame('X-123', $this->participant->voucherCode);
+        self::assertNotNull($this->participant->voucherCodeError);
+    }
+
+    public function testCodeAlreadyAppliedIsRejected(): void
+    {
+        $this->participant->purchaseVoucherCode = '1F7V6PADRZ';
+
+        $voucherValidator = $this->createMock(VoucherValidator::class);
+        $voucherValidator->expects(self::never())->method('validatePurchaseVoucher');
+
+        $this->handler($voucherValidator)->processField(['voucherCode' => '1f7v6padrz'], $this->bookingDto, 0);
+
+        self::assertSame('Dieser Code ist bereits eingelöst.', $this->participant->voucherCodeError);
+    }
+
+    public function testSecondPurchaseCodeIsRejectedAndTheFirstKept(): void
+    {
+        $this->participant->purchaseVoucherCode = '1F7V6PADRZ';
+
+        $voucherValidator = $this->createMock(VoucherValidator::class);
+        $voucherValidator->expects(self::never())->method('validatePurchaseVoucher');
+
+        $this->handler($voucherValidator)->processField(['voucherCode' => '1VDHQWPZHK'], $this->bookingDto, 0);
+
+        self::assertSame('1F7V6PADRZ', $this->participant->purchaseVoucherCode);
+        self::assertSame('1VDHQWPZHK', $this->participant->voucherCode);
+        self::assertStringContainsString('1F7V6PADRZ', (string) $this->participant->voucherCodeError);
+    }
+
+    public function testSecondPromoCodeIsRejectedAndTheFirstKept(): void
+    {
+        $applied = self::promoVoucher('R-SOMMER26');
+        $this->participant->promoVoucherCode = 'R-SOMMER26';
+        $this->participant->validatedPromoVoucher = $applied;
+        $this->voucherValidator->method('validatePromoVoucher')
+            ->willReturn(new PromoVoucherValidationResult(isValid: true, voucher: $applied));
+
+        $this->handler()->processField(['voucherCode' => 'R-WINTER26'], $this->bookingDto, 0);
+
+        self::assertSame('R-SOMMER26', $this->participant->promoVoucherCode);
+        self::assertSame($applied, $this->participant->validatedPromoVoucher);
+        self::assertStringContainsString('R-SOMMER26', (string) $this->participant->voucherCodeError);
+    }
+
+    public function testPromoAndPurchaseCodeCanBeCombined(): void
+    {
+        $this->participant->purchaseVoucherCode = '1F7V6PADRZ';
+        $this->voucherValidator->method('validatePromoVoucher')
+            ->willReturn(new PromoVoucherValidationResult(isValid: true, voucher: self::promoVoucher('R-SOMMER26')));
+
+        $this->handler()->processField(['voucherCode' => 'R-SOMMER26'], $this->bookingDto, 0);
+
+        self::assertSame('1F7V6PADRZ', $this->participant->purchaseVoucherCode);
+        self::assertSame('R-SOMMER26', $this->participant->promoVoucherCode);
+        self::assertNull($this->participant->voucherCodeError);
+    }
+
+    public function testRemovesAnAppliedCode(): void
+    {
+        $this->participant->purchaseVoucherCode = '1F7V6PADRZ';
+        $this->participant->validatedPurchaseVoucher = self::purchaseVoucher('1F7V6PADRZ');
+        $this->participant->removeVoucherCode = '1F7V6PADRZ';
+
+        $this->handler()->processField(['voucherCode' => '', 'removeVoucherCode' => '1f7v6padrz'], $this->bookingDto, 0);
+
+        self::assertNull($this->participant->purchaseVoucherCode);
+        self::assertNull($this->participant->validatedPurchaseVoucher);
+        self::assertNull($this->participant->removeVoucherCode);
+    }
+
+    public function testAppliedPromoCodeRejectedOnRecheckKeepsTheCodeWithItsReason(): void
+    {
+        $this->participant->promoVoucherCode = 'R-SOMMER26';
+        $this->participant->validatedPromoVoucher = self::promoVoucher('R-SOMMER26');
+        $this->voucherValidator->method('validatePromoVoucher')
+            ->willReturn(new PromoVoucherValidationResult(isValid: false, errorMessage: 'Mindestpreis nicht erreicht'));
+
+        $this->handler()->processField([], $this->bookingDto, 0);
+
+        self::assertSame('R-SOMMER26', $this->participant->promoVoucherCode);
+        self::assertNull($this->participant->validatedPromoVoucher);
+        self::assertSame('Aktionscode ungültig: Mindestpreis nicht erreicht', $this->participant->promoVoucherError);
+    }
+
+    public function testCodeLeftFromAnEarlierRequestIsDroppedWhenTheFieldIsNotSubmitted(): void
+    {
+        $this->participant->voucherCode = 'ABCDEF';
+        $this->participant->voucherCodeError = 'Gutschein ungültig: Gutschein nicht gefunden';
+
+        $this->handler()->processField([], $this->bookingDto, 0);
+
+        self::assertNull($this->participant->voucherCode);
+        self::assertNull($this->participant->voucherCodeError);
+    }
+}

tests/Service/BookingEditPreFlightCheckerTest.php

@@ -15,12 +15,8 @@ use App\Form\Model\BookingDto;
 use App\Form\Model\ParticipantDto;
 use App\Form\Service\ServiceAgeEvaluator;
 use App\Service\BookingEditPreFlightChecker;
-use App\Service\BookingPriceCalculator;
 use App\Service\ParticipantEligibilityChecker;
-use App\Service\VoucherValidator;
 use App\Validator\Constraints\MandatoryAdditionalServicesSelectedValidator;
-use App\Validator\Constraints\PromoVoucherValidator;
-use App\Validator\Constraints\PurchaseVoucherValidator;
 use App\Validator\Constraints\SkiPassSelectionValidator;
 use Carbon\CarbonImmutable;
 use PHPUnit\Framework\TestCase;
@@ -248,17 +244,13 @@ class BookingEditPreFlightCheckerTest extends TestCase
 
     private function createValidator(): ValidatorInterface
     {
-        $voucherValidator = $this->createStub(VoucherValidator::class);
-        $bookingPriceCalculator = $this->createStub(BookingPriceCalculator::class);
         $participantEligibilityChecker = $this->createStub(ParticipantEligibilityChecker::class);
         $participantEligibilityChecker
             ->method('isParticipantEligible')
             ->willReturn(false);
 
-        $validatorFactory = new class($voucherValidator, $bookingPriceCalculator, $participantEligibilityChecker, new ServiceAgeEvaluator()) implements ConstraintValidatorFactoryInterface {
+        $validatorFactory = new class($participantEligibilityChecker, new ServiceAgeEvaluator()) implements ConstraintValidatorFactoryInterface {
             public function __construct(
-                private readonly VoucherValidator $voucherValidator,
-                private readonly BookingPriceCalculator $bookingPriceCalculator,
                 private readonly ParticipantEligibilityChecker $participantEligibilityChecker,
                 private readonly ServiceAgeEvaluator $serviceAgeEvaluator,
             ) {
@@ -272,14 +264,6 @@ class BookingEditPreFlightCheckerTest extends TestCase
                     return new EmailValidator(Email::VALIDATION_MODE_HTML5);
                 }
 
-                if (PurchaseVoucherValidator::class === $className) {
-                    return new PurchaseVoucherValidator($this->voucherValidator);
-                }
-
-                if (PromoVoucherValidator::class === $className) {
-                    return new PromoVoucherValidator($this->voucherValidator, $this->bookingPriceCalculator);
-                }
-
                 if (MandatoryAdditionalServicesSelectedValidator::class === $className) {
                     return new MandatoryAdditionalServicesSelectedValidator(
                         $this->participantEligibilityChecker,

tests/Service/VoucherCodeClassifierTest.php

@@ -0,0 +1,58 @@
+<?php
+
+declare(strict_types=1);
+
+namespace App\Tests\Service;
+
+use App\Enum\VoucherCodeKind;
+use App\Service\VoucherCodeClassifier;
+use PHPUnit\Framework\Attributes\DataProvider;
+use PHPUnit\Framework\TestCase;
+
+class VoucherCodeClassifierTest extends TestCase
+{
+    private VoucherCodeClassifier $classifier;
+
+    protected function setUp(): void
+    {
+        $this->classifier = new VoucherCodeClassifier(['lw0705' => '2027-04-30']);
+    }
+
+    /**
+     * @return iterable<string, array{string, VoucherCodeKind}>
+     */
+    public static function codes(): iterable
+    {
+        yield 'prefixed promo' => ['R-SOMMER26', VoucherCodeKind::Promo];
+        yield 'prefixed promo in lowercase' => ['r-sommer26', VoucherCodeKind::Promo];
+        yield 'legacy promo, matched case-insensitively' => ['Lw0705', VoucherCodeKind::Promo];
+        yield 'purchase code' => ['1F7V6PADRZ', VoucherCodeKind::Purchase];
+        yield 'purchase code in lowercase' => ['1f7v6padrz', VoucherCodeKind::Purchase];
+        yield 'surrounding whitespace' => ['  1F7V6PADRZ ', VoucherCodeKind::Purchase];
+        yield 'hyphen without the promo prefix' => ['X-1F7V6PADRZ', VoucherCodeKind::Malformed];
+        yield 'characters outside the code alphabet' => ['1F7V 6PADRZ', VoucherCodeKind::Malformed];
+        yield 'empty' => ['  ', VoucherCodeKind::Malformed];
+        yield 'too long' => [str_repeat('A', 51), VoucherCodeKind::Malformed];
+    }
+
+    #[DataProvider('codes')]
+    public function testClassify(string $code, VoucherCodeKind $expected): void
+    {
+        self::assertSame($expected, $this->classifier->classify($code, new \DateTimeImmutable('2026-10-06')));
+    }
+
+    public function testLegacyCodeIsRecognisedOnItsLastDay(): void
+    {
+        self::assertSame(VoucherCodeKind::Promo, $this->classifier->classify('LW0705', new \DateTimeImmutable('2027-04-30')));
+    }
+
+    public function testLegacyCodeIsAPurchaseCodeOnceExpired(): void
+    {
+        self::assertSame(VoucherCodeKind::Purchase, $this->classifier->classify('LW0705', new \DateTimeImmutable('2027-05-01')));
+    }
+
+    public function testNormalizeTrimsAndUppercases(): void
+    {
+        self::assertSame('R-SOMMER26', $this->classifier->normalize(' r-Sommer26 '));
+    }
+}