mapResources for all Controller files found in a prefix route

gistfile1.php

/**
 * Prefixed API routes (served using Crud.ApiListener).
 */
Router::prefix('api', function ($routes) {

    //  Enable .json extension parsing
    $routes->extensions(['json', 'xml']);

    // mapResources for all Controller files found in /src/Controller/Api
    $dir = new Folder(APP . 'Controller' . DS . 'Api');
    $controllerFiles = $dir->find('.*Controller\.php');
    if ($controllerFiles) {
        foreach ($controllerFiles as $controllerFile) {
            $routes->resources(substr($controllerFile, 0, strlen($controllerFile) - 14));
         }
    }
});