wip: check eligibility based on ski pass availability

src/Form/Service/Condition/BookingEligibilityCondition.php

@@ -0,0 +1,74 @@
+<?php
+
+declare(strict_types=1);
+
+namespace App\Form\Service\Condition;
+
+use App\Form\Model\BookingDtoInterface;
+use App\Form\Service\Contract\FieldConditionInterface;
+use App\Service\ParticipantEligibilityService;
+
+/**
+ * Condition that evaluates whether a participant is eligible for booking.
+ *
+ * A participant is considered ineligible when no skipass is available for their age.
+ * When this condition is met (participant is ineligible), all service fields should
+ * be hidden and replaced with an ineligibility message.
+ *
+ * This prevents underaged participants from booking when the travel has no appropriate
+ * skipasses for their age group. Since skipasses are mandatory for booking, having no
+ * available skipasses means the participant cannot complete the booking process.
+ *
+ * The condition is satisfied when:
+ * 1. Participant has provided date of birth
+ * 2. No skipasses are available for the participant's age at travel date
+ */
+class BookingEligibilityCondition implements FieldConditionInterface
+{
+    public function __construct(
+        private readonly ParticipantEligibilityService $participantEligibilityService
+    ) {
+    }
+
+    /**
+     * Evaluates if a participant is ineligible for booking.
+     *
+     * Returns true when the participant is INELIGIBLE (should hide service fields).
+     * Returns false when the participant is eligible (show normal form fields).
+     *
+     * @param BookingDtoInterface  $bookingDto       The current booking data
+     * @param int                  $participantIndex The index of the participant being evaluated
+     * @param array<string, mixed> $formData         Current form data for condition evaluation
+     *
+     * @return bool True if participant is ineligible (no skipasses available for their age)
+     */
+    public function evaluate(BookingDtoInterface $bookingDto, int $participantIndex, array $formData): bool
+    {
+        // Invert the eligibility check since conditions typically evaluate to TRUE for "hide"
+        // isParticipantEligible() returns TRUE when eligible, we need TRUE when INELIGIBLE
+        return !$this->participantEligibilityService->isParticipantEligible($bookingDto, $participantIndex);
+    }
+
+    /**
+     * Returns field names that this condition depends on.
+     *
+     * This condition depends on the dateOfBirth field since eligibility
+     * is determined by age-based skipass availability.
+     *
+     * @return string[] Array containing field names this condition depends on
+     */
+    public function getDependentFields(): array
+    {
+        return ['dateOfBirth'];
+    }
+
+    /**
+     * Returns a human-readable description of this condition.
+     *
+     * @return string Description of the booking eligibility condition
+     */
+    public function getDescription(): string
+    {
+        return 'Participant has no available skipasses for their age';
+    }
+}