DownloadExtensionDataViewHelper.php

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<?php
namespace TYPO3\CMS\Extensionmanager\ViewHelpers;

/*
 * 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!
 */

use TYPO3\CMS\Core\Imaging\Icon;
use TYPO3\CMS\Core\Imaging\IconFactory;
use TYPO3\CMS\Core\Utility\GeneralUtility;

class DownloadExtensionDataViewHelper extends \TYPO3\CMS\Fluid\ViewHelpers\Link\ActionViewHelper
{
    protected $tagName = 'a';

    public function render($extension)
    {
        $iconFactory = GeneralUtility::makeInstance(IconFactory::class);

        $filePrefix = PATH_site . $extension['siteRelPath'];
        if (!file_exists(($filePrefix . 'ext_tables.sql')) && !file_exists(($filePrefix . 'ext_tables_static+adt.sql'))) {
            return '<span class="btn btn-default disabled">' . $iconFactory->getIcon('empty-empty', Icon::SIZE_SMALL)->render() . '</span>';
        }
        $uriBuilder = $this->controllerContext->getUriBuilder();
        $uriBuilder->reset();
        $uri = $uriBuilder->uriFor('downloadExtensionData', array(
            'extension' => $extension['key']
        ), 'Action');
        $this->tag->addAttribute('href', $uri);
        $cssClass = 'downloadExtensionData btn btn-default';
        $this->tag->addAttribute('class', $cssClass);
        $this->tag->addAttribute('title', \TYPO3\CMS\Extbase\Utility\LocalizationUtility::translate('extensionList.downloadsql', 'extensionmanager'));
        $this->tag->setContent($iconFactory->getIcon('actions-system-extension-sqldump', Icon::SIZE_SMALL)->render());
        return $this->tag->render();
    }
}