ExternalViewHelper.php

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<?php
 
declare(strict_types=1);
 
/*
 * This file is part of the TYPO3 CMS project.
 *
 * It is free software; you can redistribute it and/or modify it under
 * the terms of the GNU General Public License, either version 2
 * of the License, or any later version.
 *
 * For the full copyright and license information, please read the
 * LICENSE.txt file that was distributed with this source code.
 *
 * The TYPO3 project - inspiring people to share!
 */
 
namespace ‪TYPO3\CMS\Fluid\ViewHelpers\Uri;
 
use TYPO3Fluid\Fluid\Core\Rendering\RenderingContextInterface;
use TYPO3Fluid\Fluid\Core\ViewHelper\AbstractViewHelper;
use TYPO3Fluid\Fluid\Core\ViewHelper\Traits\CompileWithRenderStatic;
 
final class ‪ExternalViewHelper extends AbstractViewHelper
{
    use CompileWithRenderStatic;
 
    public function ‪initializeArguments(): void
    {
        $this->registerArgument('uri', 'string', 'target URI', true);
        $this->registerArgument('defaultScheme', 'string', 'scheme the href attribute will be prefixed with if specified $uri does not contain a scheme already', false, 'https');
    }
 
    public static function ‪renderStatic(array $arguments, \Closure $renderChildrenClosure, RenderingContextInterface $renderingContext): string
    {
        $uri = $arguments['uri'];
        $defaultScheme = $arguments['defaultScheme'];
        $scheme = parse_url($uri, PHP_URL_SCHEME);
        if ($scheme === null && $defaultScheme !== '') {
            $uri = $defaultScheme . '://' . $uri;
        }
        return $uri;
    }
}