class ItemController
{
    private $mapping;

    public function __construct()
    {
        $this->mapping = new dmItem();
    }

    // GET /items (liste + config)
    public function index($arr = null)
    {
        // ... charger les items ...

        return [[
            'statusCode' => 200,
            'items' => $items,
            'config' => $this->mapping->objectDesc(),  // Métadonnées des champs
        ], 200];
    }

    // GET /items/123 (détail + config)
    public function show($arr = null)
    {
        $id = $arr['id'] ?? 0;
        // ... charger l'item ...

        return [[
            'statusCode' => 200,
            'item' => $this->mapping->map($dolibarrObject),
            'config' => $this->mapping->objectDesc(),
        ], 200];
    }
}