wip: backport booking create flow form handling to edit flow

src/BusProNet/DataProcessor/BookingDataProcessor.php

@@ -69,6 +69,7 @@ class BookingDataProcessor
      * Resets all existing participant-to-service mappings to start with a clean slate.
      *
      * This ensures that service assignments are rebuilt from scratch based on current form selections.
+     * Includes resetting room mappings to allow room reassignments during edit.
      *
      * @param object $bookingData The booking data object containing services to reset
      */
@@ -79,6 +80,7 @@ class BookingDataProcessor
             ...$bookingData->transportationServices,
             ...$bookingData->pickupsOutbound,
             ...$bookingData->pickupsInbound,
+            ...$bookingData->rooms,
         ];
 
         foreach ($servicesToReset as $service) {
@@ -90,7 +92,7 @@ class BookingDataProcessor
      * Processes all services for a single participant.
      *
      * This orchestrator method handles the complete service assignment workflow for one participant,
-     * including additional services, transportation services, and pickup locations.
+     * including additional services, transportation services, pickup locations, and room assignments.
      *
      * @param object $participant The participant data from the form
      * @param object $bookingData The booking data object to update
@@ -105,6 +107,7 @@ class BookingDataProcessor
         $this->processAdditionalServices($participant, $bookingData, $travelData);
         $this->processTransportationServices($participant, $bookingData, $travelData);
         $this->processPickupLocations($participant, $bookingData);
+        $this->processRoomAssignment($participant, $bookingData);
     }
 
     /**
@@ -190,6 +193,31 @@ class BookingDataProcessor
         }
     }
 
+    /**
+     * Processes room assignment for a participant.
+     *
+     * Maps the participant to their assigned room. Allows room reassignment during
+     * booking edits while maintaining the constraint that participants can only be
+     * assigned to room types that have already been booked.
+     *
+     * @param object $participant The participant data from the form
+     * @param object $bookingData The booking data object to update
+     */
+    private function processRoomAssignment(object $participant, object $bookingData): void
+    {
+        if (null === $participant->assignedRoomId) {
+            return;
+        }
+
+        // Find the room in the existing booking by ID
+        foreach ($bookingData->rooms as $room) {
+            if ($room->id === $participant->assignedRoomId) {
+                $room->mapping[] = $participant->index;
+                break;
+            }
+        }
+    }
+
     /**
      * Removes services and pickups with no participant mappings.
      *