class.tx_robots_postproc.php

<?php
/***************************************************************
*  Copyright notice
*
*  (c) 2007 Dmitry Dulepov <dmitry@typo3.org>
*  All rights reserved
*
*  This script is part of the TYPO3 project. The TYPO3 project is
*  free software; you can redistribute it and/or modify
*  it under the terms of the GNU General Public License as published by
*  the Free Software Foundation; either version 2 of the License, or
*  (at your option) any later version.
*
*  The GNU General Public License can be found at
*  http://www.gnu.org/copyleft/gpl.html.
*
*  This script is distributed in the hope that it will be useful,
*  but WITHOUT ANY WARRANTY; without even the implied warranty of
*  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
*  GNU General Public License for more details.
*
*  This copyright notice MUST APPEAR in all copies of the script!
***************************************************************/

/**
 * [CLASS/FUNCTION INDEX of SCRIPT]
 */

/**
 * Content post-processing functions.
 *
 * @author	Dmitry Dulepov <dmitry@typo3.org>
 * @package	TYPO3
 * @subpackage	tx_robots
 */
class tx_robots_postproc {

	/**
	 * Checks for indexing flags
	 *
	 * @param	array	$params	Unused
	 * @param	object	$pObj	Reference to TSFE
	 */
	function contentPostProcOutput(&$params, &$pObj) {
		// Only if flags are non-zero and <meta name="robots"> is not set already
		if ($GLOBALS['TSFE']->page['tx_robots_flags'] &&
				false !== ($pos = stripos($pObj->content, '</head>')) &&
				!preg_match('/<meta[^>]*\sname=([\'"])?robots\1/i', $pObj->content)) {
			$values = array(1 => 'index', 2 => 'follow');
			if ($GLOBALS['TSFE']->page['tx_robots_flags'] & 1) {
				$values[1] = 'noindex';
			}
			if ($GLOBALS['TSFE']->page['tx_robots_flags'] & 2) {
				$values[2] = 'nofollow';
			}
			$pObj->content = substr($pObj->content, 0, $pos) .
				'<meta name="robots" content="' . implode(',', $values) . '" />' . chr(10) .
				substr($pObj->content, $pos);
		}
	}
}

if (defined('TYPO3_MODE') && $TYPO3_CONF_VARS[TYPO3_MODE]['XCLASS']['ext/robots/class.tx_robots_postproc.php'])	{
	include_once($TYPO3_CONF_VARS[TYPO3_MODE]['XCLASS']['ext/robots/class.tx_robots_postproc.php']);
}

?>