IfHasRoleViewHelper.php

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<?php
namespace TYPO3\CMS\Fluid\ViewHelpers\Security;

/*
 * 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!
 */

class IfHasRoleViewHelper extends \TYPO3\CMS\Fluid\Core\ViewHelper\AbstractConditionViewHelper
{
    public function initializeArguments()
    {
        parent::initializeArguments();

        $this->registerArgument('role', 'string', 'The usergroup (either the usergroup uid or its title).');
    }

    protected static function evaluateCondition($arguments = null)
    {
        $role = $arguments['role'];
        if (!isset($GLOBALS['TSFE']) || !$GLOBALS['TSFE']->loginUser) {
            return false;
        }
        if (is_numeric($role)) {
            return is_array($GLOBALS['TSFE']->fe_user->groupData['uid']) && in_array($role, $GLOBALS['TSFE']->fe_user->groupData['uid']);
        }
        return is_array($GLOBALS['TSFE']->fe_user->groupData['title']) && in_array($role, $GLOBALS['TSFE']->fe_user->groupData['title']);
    }

    public function render()
    {
        if (static::evaluateCondition($this->arguments)) {
            return $this->renderThenChild();
        }
        return $this->renderElseChild();
    }
}