<?php
namespace FluidTYPO3\Vhs\ViewHelpers\Page;

/*
 * This file is part of the FluidTYPO3/Vhs project under GPLv2 or later.
 *
 * For the full copyright and license information, please read the
 * LICENSE.md file that was distributed with this source code.
 */

use FluidTYPO3\Vhs\ViewHelpers\Asset\AbstractAssetViewHelper;

/**
 * ViewHelper used to place header blocks in document header
 *
 * @package Vhs
 * @subpackage ViewHelpers\Page
 */
class HeaderViewHelper extends AbstractAssetViewHelper {

	/**
	 * Render method
	 *
	 * @return void
	 */
	public function render() {
		if ('BE' === TYPO3_MODE) {
			return;
		}
		$content = $this->getContent();
		$name = $this->getName();
		$overwrite = $this->getOverwrite();
		if (TRUE === isset($GLOBALS['TSFE']->additionalHeaderData[$name]) && FALSE === $overwrite) {
			return;
		}
		$GLOBALS['TSFE']->additionalHeaderData[$name] = $content;
	}

}