invoiceninja/app/Http/Controllers/Controller.php

<?php
/**
 * Invoice Ninja (https://invoiceninja.com)
 *
 * @link https://github.com/invoiceninja/invoiceninja source repository
 *
 * @copyright Copyright (c) 2020. Invoice Ninja LLC (https://invoiceninja.com)
 *
 * @license https://opensource.org/licenses/AAL
 */

namespace App\Http\Controllers;

use App\Utils\Traits\UserSessionAttributes;
use Illuminate\Foundation\Bus\DispatchesJobs;
use Illuminate\Routing\Controller as BaseController;
use Illuminate\Foundation\Validation\ValidatesRequests;
use Illuminate\Foundation\Auth\Access\AuthorizesRequests;

class Controller extends BaseController
{
    use AuthorizesRequests, DispatchesJobs, ValidatesRequests;

    /**
     * @param string $path
     * @param array $options
     *
     * @return \Illuminate\Contracts\View\Factory|\Illuminate\View\View
     */
    public function render(string $path, array $options = [])
    {
        $theme = array_key_exists('theme', $options) ? $options['theme'] : 'ninja2020';

        if (array_key_exists('root', $options)) {
            return view(
                sprintf('%s.%s.%s', $options['root'], $theme, $path)
            , $options);
        }

        return view("portal.$theme.$path", $options);
    }
}