feat: clarify booking summary participant count

src/Service/BookingSummaryDataService.php

@@ -27,6 +27,7 @@ class BookingSummaryDataService
 {
     public function __construct(
         private readonly BookingPriceCalculatorService $priceCalculator,
+        private readonly BookingSummaryParticipantCountService $participantCountService,
         private readonly CmsDataService $cmsDataService,
         private readonly HotelLoader $hotelLoader,
         private readonly CountryDataProvider $countryDataProvider,
@@ -74,8 +75,7 @@ class BookingSummaryDataService
             $cmsData = $this->getCmsDataForProduct($productCode, $hotelCode);
         }
 
-        // Calculate participant count from room capacity (source of truth)
-        $participantCount = $this->calculateParticipantCountFromRooms($bookingDto);
+        $participantCount = $this->participantCountService->calculate($bookingDto);
 
         $acceptedVouchers = $bookingDto->getAcceptedVouchers($participantPrices);
 
@@ -118,33 +118,6 @@ class BookingSummaryDataService
         return max(0.0, $grandTotal - $acceptedVouchers->getTotalDiscount());
     }
 
-    /**
-     * Calculates participant count.
-     *
-     * In edit mode, counts actual participants. In create mode, calculates
-     * from room selections by multiplying quantity by maximum capacity (maxPax).
-     */
-    private function calculateParticipantCountFromRooms(BookingDto $bookingDto): int
-    {
-        // In edit mode, use actual participant count
-        if (BookingDto::MODE_EDIT === $bookingDto->getMode()) {
-            return count($bookingDto->participants);
-        }
-
-        // In create mode, calculate from room selections
-        $totalCapacity = 0;
-        $availableRooms = $bookingDto->travel->getAvailableRooms();
-
-        foreach ($bookingDto->roomSelections as $selection) {
-            if ($selection->quantity > 0 && isset($availableRooms[$selection->id])) {
-                $room = $availableRooms[$selection->id];
-                $totalCapacity += $selection->quantity * ($room->maxPax ?? 0);
-            }
-        }
-
-        return $totalCapacity;
-    }
-
     /**
      * Fetches hotel display data combining local base hotel data with CMS images.
      *

src/Service/BookingSummaryParticipantCountService.php

@@ -0,0 +1,40 @@
+<?php
+
+declare(strict_types=1);
+
+namespace App\Service;
+
+use App\Form\Model\BookingDto;
+
+/**
+ * Calculates the participant count shown in the summary sidebar.
+ *
+ * In create step 1, derive the expected participant count from room selections.
+ * In later create steps and edit mode, use the actual participant list.
+ */
+class BookingSummaryParticipantCountService
+{
+    public function calculate(BookingDto $bookingDto): int
+    {
+        if (BookingDto::MODE_CREATE === $bookingDto->getMode() && 1 === $bookingDto->currentStep) {
+            return $this->calculateExpectedParticipantCountFromRooms($bookingDto);
+        }
+
+        return count($bookingDto->participants);
+    }
+
+    private function calculateExpectedParticipantCountFromRooms(BookingDto $bookingDto): int
+    {
+        $totalCapacity = 0;
+        $availableRooms = $bookingDto->travel->getAvailableRooms();
+
+        foreach ($bookingDto->roomSelections as $selection) {
+            if ($selection->quantity > 0 && isset($availableRooms[$selection->id])) {
+                $room = $availableRooms[$selection->id];
+                $totalCapacity += $selection->quantity * ($room->maxPax ?? 0);
+            }
+        }
+
+        return $totalCapacity;
+    }
+}