<?php/** * @version		$Id: media.php 10381 2008-06-01 03:35:53Z pasamio $ * @package		Joomla * @subpackage	Media * @copyright	Copyright (C) 2005 - 2008 Open Source Matters. All rights reserved. * @license		GNU/GPL, see LICENSE.php * Joomla! is free software. This version may have been modified pursuant to the * GNU General Public License, and as distributed it includes or is derivative * of works licensed under the GNU General Public License or other free or open * source software licenses. See COPYRIGHT.php for copyright notices and * details. *//** * @package		Joomla * @subpackage	Media */class MediaHelper{	/**	 * Checks if the file is an image	 * @param string The filename	 * @return boolean	 */	function isImage( $fileName )	{		static $imageTypes = 'xcf|odg|gif|jpg|png|bmp';		return preg_match("/$imageTypes/i",$fileName);	}	/**	 * Checks if the file is an image	 * @param string The filename	 * @return boolean	 */	function getTypeIcon( $fileName )	{		// Get file extension		return strtolower(substr($fileName, strrpos($fileName, '.') + 1));	}	/**	 * Checks if the file can be uploaded	 *	 * @param array File information	 * @param string An error message to be returned	 * @return boolean	 */	function canUpload( $file, &$err )	{		$params = &JComponentHelper::getParams( 'com_media' );		if(empty($file['name'])) {			$err = 'Please input a file for upload';			return false;		}		jimport('joomla.filesystem.file');		if ($file['name'] !== JFile::makesafe($file['name'])) {			$err = 'WARNFILENAME';			return false;		}		$format = strtolower(JFile::getExt($file['name']));		$allowable = explode( ',', $params->get( 'upload_extensions' ));		$ignored = explode(',', $params->get( 'ignore_extensions' ));		if (!in_array($format, $allowable) && !in_array($format,$ignored))		{			$err = 'WARNFILETYPE';			return false;		}		$maxSize = (int) $params->get( 'upload_maxsize', 0 );		if ($maxSize > 0 && (int) $file['size'] > $maxSize)		{			$err = 'WARNFILETOOLARGE';			return false;		}		$user = JFactory::getUser();		$imginfo = null;		if($params->get('restrict_uploads',1) ) {			$images = explode( ',', $params->get( 'image_extensions' ));			if(in_array($format, $images)) { // if its an image run it through getimagesize				if(($imginfo = getimagesize($file['tmp_name'])) === FALSE) {					$err = 'WARNINVALIDIMG';					return false;				}			} else if(!in_array($format, $ignored)) {				// if its not an image...and we're not ignoring it				$allowed_mime = explode(',', $params->get('upload_mime'));				$illegal_mime = explode(',', $params->get('upload_mime_illegal'));				if(function_exists('finfo_open') && $params->get('check_mime',1)) {					// We have fileinfo					$finfo = finfo_open(FILEINFO_MIME);					$type = finfo_file($finfo, $file['tmp_name']);					if(strlen($type) && !in_array($type, $allowed_mime) && in_array($type, $illegal_mime)) {						$err = 'WARNINVALIDMIME';						return false;					}					finfo_close($finfo);				} else if(function_exists('mime_content_type') && $params->get('check_mime',1)) {					// we have mime magic					$type = mime_content_type($file['tmp_name']);					if(strlen($type) && !in_array($type, $allowed_mime) && in_array($type, $illegal_mime)) {						$err = 'WARNINVALIDMIME';						return false;					}				} else if(!$user->authorize( 'login', 'administrator' )) {					$err = 'WARNNOTADMIN';					return false;				}			}		}		$xss_check =  JFile::read($file['tmp_name'],false,256);		$html_tags = array('abbr','acronym','address','applet','area','audioscope','base','basefont','bdo','bgsound','big','blackface','blink','blockquote','body','bq','br','button','caption','center','cite','code','col','colgroup','comment','custom','dd','del','dfn','dir','div','dl','dt','em','embed','fieldset','fn','font','form','frame','frameset','h1','h2','h3','h4','h5','h6','head','hr','html','iframe','ilayer','img','input','ins','isindex','keygen','kbd','label','layer','legend','li','limittext','link','listing','map','marquee','menu','meta','multicol','nobr','noembed','noframes','noscript','nosmartquotes','object','ol','optgroup','option','param','plaintext','pre','rt','ruby','s','samp','script','select','server','shadow','sidebar','small','spacer','span','strike','strong','style','sub','sup','table','tbody','td','textarea','tfoot','th','thead','title','tr','tt','ul','var','wbr','xml','xmp','!DOCTYPE', '!--');		foreach($html_tags as $tag) {			// A tag is '<tagname ', so we need to add < and a space or '<tagname>'			if(stristr($xss_check, '<'.$tag.' ') || stristr($xss_check, '<'.$tag.'>')) {				$err = 'WARNIEXSS';				return false;			}		}		return true;	}	function parseSize($size)	{		if ($size < 1024) {			return $size . ' bytes';		}		else		{			if ($size >= 1024 && $size < 1024 * 1024) {				return sprintf('%01.2f', $size / 1024.0) . ' Kb';			} else {				return sprintf('%01.2f', $size / (1024.0 * 1024)) . ' Mb';			}		}	}	function imageResize($width, $height, $target)	{		//takes the larger size of the width and height and applies the		//formula accordingly...this is so this script will work		//dynamically with any size image		if ($width > $height) {			$percentage = ($target / $width);		} else {			$percentage = ($target / $height);		}		//gets the new value and applies the percentage, then rounds the value		$width = round($width * $percentage);		$height = round($height * $percentage);		return array($width, $height);	}	function countFiles( $dir )	{		$total_file = 0;		$total_dir = 0;		if (is_dir($dir)) {			$d = dir($dir);			while (false !== ($entry = $d->read())) {				if (substr($entry, 0, 1) != '.' && is_file($dir . DIRECTORY_SEPARATOR . $entry) && strpos($entry, '.html') === false && strpos($entry, '.php') === false) {					$total_file++;				}				if (substr($entry, 0, 1) != '.' && is_dir($dir . DIRECTORY_SEPARATOR . $entry)) {					$total_dir++;				}			}			$d->close();		}		return array ( $total_file, $total_dir );	}}