feat: extract room grouping from booking service

src/Service/BookingRoomSelectionService.php

@@ -0,0 +1,40 @@
+<?php
+
+declare(strict_types=1);
+
+namespace App\Service;
+
+use App\BusProNet\Model\Room;
+
+/**
+ * Groups room data for booking steps.
+ */
+class BookingRoomSelectionService
+{
+    /**
+     * @param array<int, Room> $rooms
+     *
+     * @return array{by_pax: array<int, Room>, by_room: array<int, Room>}
+     */
+    public function groupRoomsBySelectionType(array $rooms): array
+    {
+        $groups = [
+            Room::SELECTION_TYPE_BY_PAX => [],
+            Room::SELECTION_TYPE_BY_ROOM => [],
+        ];
+
+        foreach ($rooms as $room) {
+            if (false !== stripos($room->label, 'bett')) {
+                $groups[Room::SELECTION_TYPE_BY_PAX][$room->id] = $room;
+                continue;
+            }
+
+            $groups[Room::SELECTION_TYPE_BY_ROOM][$room->id] = $room;
+        }
+
+        uasort($groups[Room::SELECTION_TYPE_BY_PAX], static fn (Room $a, Room $b): int => $a->maxPax <=> $b->maxPax);
+        uasort($groups[Room::SELECTION_TYPE_BY_ROOM], static fn (Room $a, Room $b): int => $a->maxPax <=> $b->maxPax);
+
+        return $groups;
+    }
+}