feat: automatic unselection of discounted transportation

src/Form/Service/ParticipantTransportationDiscountReplacementFieldHandler.php

@@ -0,0 +1,156 @@
+<?php
+
+declare(strict_types=1);
+
+namespace App\Form\Service;
+
+use App\BusProNet\Utility\DirectionMapper;
+use App\Form\Model\BookingDto;
+use App\Form\Service\Abstract\AbstractParticipantFieldHandler;
+use App\Service\ServiceAvailabilityCalculator;
+
+class ParticipantTransportationDiscountReplacementFieldHandler extends AbstractParticipantFieldHandler
+{
+    public function __construct(
+        private readonly ServiceAvailabilityCalculator $serviceAvailabilityCalculator,
+    ) {
+    }
+
+    public function getFieldName(): string
+    {
+        return 'transportationDiscountReplacement'; // Virtual field name
+    }
+
+    public function getDependencies(): array
+    {
+        return ['transportationOutbound', 'transportationInbound'];
+    }
+
+    public function shouldProcess(array $submittedData, string $mode, int $participantIndex): bool
+    {
+        return true; // Always process in all modes
+    }
+
+    /**
+     * Processes transportation discount replacement logic.
+     *
+     * Detects incompatible transportation combinations and automatically replaces
+     * discounted PKW with regular variant when inbound bus is selected. Also restores
+     * discounted PKW when inbound changes back to PKW and discount is still available.
+     *
+     * Business Rules:
+     * - Inbound BUS + Outbound discounted PKW → Replace with regular PKW (notification: warning)
+     * - Inbound PKW + Outbound regular PKW → Restore discounted PKW if available (notification: success)
+     * - Only processes PKW variants, never touches BUS or other services
+     */
+    public function processField(array $submittedData, BookingDto $bookingDto, int $participantIndex): void
+    {
+        // Step 1: Get participant and validate prerequisites
+        $participant = $bookingDto->getParticipant($participantIndex);
+        if (null === $participant) {
+            return;
+        }
+
+        // Need both transportation fields to process
+        if (null === $participant->transportationOutbound) {
+            return;
+        }
+
+        // Step 2: Detect inbound transportation type
+        $inboundIsBus = null !== $participant->transportationInbound
+            && DirectionMapper::SUBTYPE_BUS_API === $participant->transportationInbound->subType;
+
+        // Step 3: Get all outbound PKW services
+        // Get ALL outbound services (not filtered by availability or smart filtering)
+        $allOutboundServices = $bookingDto->travel->getTransportationServicesByDirection(
+            DirectionMapper::OUTBOUND_TRAVEL,
+            false // Do NOT filter by per-booking availability
+        );
+
+        // Find discounted and regular PKW services
+        $discountedPkw = null;
+        $regularPkw = null;
+
+        foreach ($allOutboundServices as $service) {
+            if (false === DirectionMapper::isCar($service->subType)) {
+                continue; // Skip non-PKW services
+            }
+
+            if (null !== $service->price && $service->price < 0) {
+                $discountedPkw = $service;
+            } elseif (null === $service->price || $service->price >= 0) {
+                $regularPkw = $service;
+            }
+        }
+
+        // Edge case: no regular PKW found (impossible in production, but handle gracefully)
+        if (null === $regularPkw) {
+            return;
+        }
+
+        // Step 4a: Handle inbound BUS scenario (force regular PKW)
+        if (true === $inboundIsBus) {
+            // Check if outbound is currently DISCOUNTED PKW
+            $outboundIsDiscountedPkw = DirectionMapper::isCar($participant->transportationOutbound->subType)
+                && null !== $participant->transportationOutbound->price
+                && $participant->transportationOutbound->price < 0;
+
+            if ($outboundIsDiscountedPkw) {
+                // Store original for notification
+                $originalLabel = $participant->transportationOutbound->label;
+
+                // Replace with regular PKW
+                $participant->transportationOutbound = $regularPkw;
+
+                // Notify user about replacement
+                $participant->addNotification(
+                    'warning',
+                    sprintf(
+                        'Hinfahrt automatisch angepasst: Rabattierte Anreise nicht möglich bei Busrückfahrt. Geändert von "%s" zu "%s".',
+                        $originalLabel,
+                        $regularPkw->label
+                    )
+                );
+            }
+
+            return; // Done processing for BUS inbound scenario
+        }
+
+        // Step 4b: Handle non-BUS inbound scenario (restore discount if available)
+        // Inbound is NOT BUS - try to restore discounted PKW if available
+
+        // Check if outbound is currently REGULAR PKW
+        $outboundIsRegularPkw = DirectionMapper::isCar($participant->transportationOutbound->subType)
+            && (null === $participant->transportationOutbound->price
+                || $participant->transportationOutbound->price >= 0);
+
+        if (false === $outboundIsRegularPkw || null === $discountedPkw) {
+            return; // Not eligible for discount restoration
+        }
+
+        // Check per-booking availability of discounted PKW
+        $discountedIsAvailable = false === $this->serviceAvailabilityCalculator->isServiceUnavailable(
+            $discountedPkw->id,
+            $bookingDto,
+            $participantIndex
+        );
+
+        if ($discountedIsAvailable) {
+            // Store original for notification
+            $originalLabel = $participant->transportationOutbound->label;
+
+            // Restore discounted PKW
+            $participant->transportationOutbound = $discountedPkw;
+
+            // Notify user about restoration
+            $participant->addNotification(
+                'success',
+                sprintf(
+                    'Hinfahrt automatisch angepasst: Rabattierte Anreise wieder verfügbar. Geändert von "%s" zu "%s".',
+                    $originalLabel,
+                    $discountedPkw->label
+                )
+            );
+        }
+    }
+}