feat: offer non-travelling applicant choice only on selected travels

src/BusProNet/Model/Travel.php

@@ -20,6 +20,12 @@ use Symfony\Component\Serializer\Normalizer\DateTimeNormalizer;
 class Travel
 {
     use SortByPriceTrait;
+
+    /**
+     * CRM selection that offers the "I am not travelling myself" choice on a travel date.
+     */
+    private const NON_TRAVELLING_APPLICANT_SELECTION_ID = 1488;
+
     #[Groups(['api:list', 'api:single', 'snapshot'])]
     public ?int $id = null;
 
@@ -240,6 +246,15 @@ class Travel
         return false;
     }
 
+    /**
+     * Whether a booking for this travel date may be placed by an applicant who does not travel
+     * along, such as a parent booking for their children.
+     */
+    public function allowsNonTravellingApplicant(): bool
+    {
+        return $this->hasSelectionId(self::NON_TRAVELLING_APPLICANT_SELECTION_ID);
+    }
+
     /**
      * Retrieves rooms filtered by their IDs.
      *