0byt3m1n1-V2

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File: class.dc.media.php
<?php
# ***** BEGIN LICENSE BLOCK *****
# This file is part of DotClear.
# Copyright (c) 2005 Olivier Meunier and contributors. All rights
# reserved.
#
# DotClear 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.
# 
# DotClear 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.
# 
# You should have received a copy of the GNU General Public License
# along with DotClear; if not, write to the Free Software
# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
#
# ***** END LICENSE BLOCK *****

/**
@ingroup DC_CORE
@brief Dotclear media manage

This class handles Dotclear media items.
*/
class dcMedia extends filemanager
{
	protected $core;		///< <b>dcCore</b> dcCore instance
	protected $con;		///< <b>connection</b> Database connection
	protected $table;		///< <b>string</b> Media table name
	protected $table_ref;	///< <b>string</b> Post-media relation table name
	protected $type;		///< <b>string</b> Media type filter
	
	protected $file_handler = array();	///< <b>array</b> Array of callbacks
	
	public $thumb_tp = '%s/.%s_%s.jpg';	///< <b>string</b> Thumbnail file pattern
	
	/**
	<b>array</b> Tubmnail sizes:
	- m: medium image
	- s: small image
	- t: thumbnail image
	- sq: square image
	*/
	public $thumb_sizes = array(	
		'm' => array(448,'ratio','medium'),
		's' => array(240,'ratio','small'),
		't' => array(100,'ratio','thumbnail'),
		'sq' => array(48,'crop','square')
	);
	
	public $icon_img = 'images/media/%s.png';	///< <b>string</b> Icon file pattern
	
	/**
	Object constructor.
	
	@param	core		<b>dcCore</b>		dcCore instance
	@param	type		<b>string</b>		Media type filter
	*/
	public function __construct(&$core,$type='')
	{
		$this->core =& $core;
		$this->con =& $core->con;
		
		if ($this->core->blog == null) {
			throw new Exception(__('No blog defined.'));
		}
		
		$this->table = $this->core->prefix.'media';
		$this->table_ref = $this->core->prefix.'post_media';
		$root = $this->core->blog->public_path;
		$root_url = $this->core->blog->host.path::clean($this->core->blog->settings->public_url);
		
		if (!is_dir($root)) {
			throw new Exception(sprintf(__('Directory %s does not exist.'),$root));
		}
		
		$this->type = $type;
		
		parent::__construct($root,$root_url);
		$this->chdir('');
		
		$this->path = $this->core->blog->settings->public_path;
		
		$this->addExclusion(DC_RC_PATH);
		$this->addExclusion(dirname(__FILE__).'/../');
		
		# Event handlers
		$this->addFileHandler('image/jpeg','create',array($this,'imageThumbCreate'));
		$this->addFileHandler('image/png','create',array($this,'imageThumbCreate'));
		$this->addFileHandler('image/gif','create',array($this,'imageThumbCreate'));
		
		$this->addFileHandler('image/png','update',array($this,'imageThumbUpdate'));
		$this->addFileHandler('image/jpeg','update',array($this,'imageThumbUpdate'));
		$this->addFileHandler('image/gif','update',array($this,'imageThumbUpdate'));
		
		$this->addFileHandler('image/png','remove',array($this,'imageThumbRemove'));
		$this->addFileHandler('image/jpeg','remove',array($this,'imageThumbRemove'));
		$this->addFileHandler('image/gif','remove',array($this,'imageThumbRemove'));
		
		$this->addFileHandler('image/jpeg','create',array($this,'imageMetaCreate'));
	}
	
	/**
	Changes working directory.
	
	@param	dir		<b>string</b>		Directory name.
	*/
	public function chdir($dir)
	{
		parent::chdir($dir);
		$this->relpwd = preg_replace('/^'.preg_quote($this->root,'/').'\/?/','',$this->pwd);
	}
	
	/**
	Adds a new file handler for a given media type and event.
	
	Available events are:
	- create: file creation
	- update: file update
	- remove: file deletion
	
	@param	type		<b>string</b>		Media type
	@param	event	<b>string</b>		Event
	@param	function	<b>callback</b>
	*/
	public function addFileHandler($type,$event,$function)
	{
		if (is_callable($function)) {
			$this->file_handler[$type][$event][] = $function;
		}
	}
	
	protected function callFileHandler($type,$event)
	{
		if (!empty($this->file_handler[$type][$event]))
		{
			$args = func_get_args();
			array_shift($args);
			array_shift($args);
			
			foreach ($this->file_handler[$type][$event] as $f)
			{
				call_user_func_array($f,$args);
			}
		}
	}
	
	/**
	Returns HTML breadCrumb for media manager navigation.
	
	@param	href		<b>string</b>		URL pattern
	@return	<b>string</b> HTML code
	*/
	public function breadCrumb($href)
	{
		$res = '';
		if ($this->relpwd && $this->relpwd != '.') {
			$pwd = '';
			foreach (explode('/',$this->relpwd) as $v) {
				$pwd .= rawurlencode($v).'/';
				$res .= '<a href="'.sprintf($href,$pwd).'">'.$v.'</a> / ';
			}
		}
		return $res;
		
	}
	
	protected function fileRecord(&$rs)
	{
		if ($rs->isEmpty()) { return null; }
		
		if (is_file($this->root.'/'.$rs->media_file))
		{
			$f = new fileItem($this->root.'/'.$rs->media_file,$this->root,$this->root_url);
			
			if ($this->type && $f->type_prefix != $this->type) {
				return null;
			}
			
			$f->editable = true;
			$f->media_id = $rs->media_id;
			$f->media_title = $rs->media_title;
			$f->media_meta = $rs->media_meta;
			$f->media_user = $rs->user_id;
			$f->media_priv = (boolean) $rs->media_private;
			$f->media_dt = strtotime($rs->media_dt);
			$f->media_dtstr = dt::str('%Y-%m-%d %H:%M',$f->media_dt);
			
			$f->media_image = false;
			
			if (!$this->core->auth->check('media_admin',$this->core->blog->id)
			&& $this->core->auth->userID() != $f->media_user) {
				$f->del = false;
				$f->editable = false;
			}
			
			$type_prefix = explode('/',$f->type);
			$type_prefix = $type_prefix[0];
			
			switch ($type_prefix) {
				case 'image':
					$f->media_image = true;
					$f->media_icon = 'image';
					break;
				case 'audio':
					$f->media_icon = 'audio';
					break;
				case 'text':
					$f->media_icon = 'text';
					break;
				case 'video':
					$f->media_icon = 'video';
					break;
				default:
					$f->media_icon = 'blank';
			}
			switch ($f->type) {
				case 'application/msword':
				case 'application/vnd.oasis.opendocument.text':
				case 'application/vnd.sun.xml.writer':
				case 'application/pdf':
				case 'application/postscript':
					$f->media_icon = 'document';
					break;
				case 'application/msexcel':
				case 'application/vnd.oasis.opendocument.spreadsheet':
				case 'application/vnd.sun.xml.calc':
					$f->media_icon = 'spreadsheet';
					break;
				case 'application/mspowerpoint':
				case 'application/vnd.oasis.opendocument.presentation':
				case 'application/vnd.sun.xml.impress':
					$f->media_icon = 'presentation';
					break;
				case 'application/x-debian-package':
				case 'application/x-gzip':
				case 'application/x-java-archive':
				case 'application/rar':
				case 'application/x-redhat-package-manager':
				case 'application/x-tar':
				case 'application/x-gtar':
				case 'application/zip':
					$f->media_icon = 'package';
					break;
				case 'application/octet-stream':
					$f->media_icon = 'executable';
					break;
				case 'application/x-shockwave-flash':
					$f->media_icon = 'video';
					break;
				case 'application/ogg':
					$f->media_icon = 'audio';
					break;
				case 'text/html':
					$f->media_icon = 'html';
					break;
			}
			
			$f->media_type = $f->media_icon;
			$f->media_icon = sprintf($this->icon_img,$f->media_icon);
			
			# Thumbnails
			$f->media_thumb = array();
			$p = path::info($f->relname);
			$thumb = sprintf($this->thumb_tp,$this->root.'/'.$p['dirname'],$p['base'],'%s');
			$thumb_url = sprintf($this->thumb_tp,$this->root_url.$p['dirname'],$p['base'],'%s');
			
			foreach ($this->thumb_sizes as $suffix => $s) {
				if (file_exists(sprintf($thumb,$suffix))) {
					$f->media_thumb[$suffix] = sprintf($thumb_url,$suffix);
				}
			}
			
			if (isset($f->media_thumb['sq'])) {
				$f->media_icon = $f->media_thumb['sq'];
			}
			
			return $f;
		}
		
		return null;
	}
	
	/**
	Gets current working directory content. 
	
	@param	type		<b>string</b>		Media type filter
	*/
	public function getDir($type=null)
	{
		if ($type) {
			$this->type = $type;
		}
		
		$media_dir = $this->relpwd ? $this->relpwd : '.';
		
		$strReq =
		'SELECT media_file, media_id, media_path, media_title, media_meta, media_dt, '.
		'media_creadt, media_upddt, media_private, user_id '.
		'FROM '.$this->table.' '.
		"WHERE media_path = '".$this->path."' ".
		"AND media_dir = '".$this->con->escape($media_dir)."' ";
		
		if (!$this->core->auth->check('media_admin',$this->core->blog->id))
		{
			$strReq .= 'AND (media_private <> 1 ';
			
			if ($this->core->auth->userID()) {
				$strReq .= "OR user_id = '".$this->con->escape($this->core->auth->userID())."'";
			}
			$strReq .= ') ';
		}
		
		$strReq .= 'ORDER BY LOWER(media_file) ASC';
		
		$rs = $this->con->select($strReq);
		
		parent::getDir();
		
		$f_res = array();
		$p_dir = $this->dir;
		
		# If type is set, remove items from p_dir
		if ($this->type)
		{
			foreach ($p_dir['files'] as $k => $f) {
				if ($f->type_prefix != $this->type) {
					unset($p_dir['files'][$k]);
				}
			}
		}
		
		$f_reg = array();
		
		while ($rs->fetch())
		{
			# File in subdirectory, forget about it!
			if (dirname($rs->media_file) != '.' && dirname($rs->media_file) != $this->relpwd) {
				continue;
			}
			
			if ($this->inFiles($rs->media_file))
			{
				$f = $this->fileRecord($rs);
				if ($f !== null) {
					$f_res[] = $this->fileRecord($rs);
					$f_reg[$rs->media_file] = 1;
				}
			}
			elseif (!empty($p_dir['files']) && $this->relpwd == '')
			{
				# Physica file does not exist remove it from DB
				# Because we don't want to erase everything on
				# dotclear upgrade, do it only if there are files
				# in directory and directory is root
				$this->con->execute(
					'DELETE FROM '.$this->table.' '.
					"WHERE media_path = '".$this->con->escape($this->path)."' ".
					"AND media_file = '".$this->con->escape($rs->media_file)."' "
				);
				$this->callFileHandler(files::getMimeType($rs->media_file),'remove',$this->pwd.'/'.$rs->media_file);
			}
		}
		
		$this->dir['files'] = $f_res;
		foreach ($this->dir['dirs'] as $k => $v) {
			$v->media_icon = sprintf($this->icon_img,'folder');
		}
		
		# Check files that don't exist in database and create them
		foreach ($p_dir['files'] as $f)
		{
			if (!isset($f_reg[$f->relname])) {
				if (($id = $this->createFile($f->basename)) !== false) {
					$this->dir['files'][] = $this->getFile($id);
				}
			}
		}
	}
	
	/**
	Gets file by its id. Returns a filteItem object.
	
	@param	id		<b>integer</b>		File ID
	@return	<b>fileItem</b>
	*/
	public function getFile($id)
	{
		$strReq =
		'SELECT media_id, media_path, media_title, '.
		'media_file, media_meta, media_dt, media_creadt, '.
		'media_upddt, media_private, user_id '.
		'FROM '.$this->table.' '.
		"WHERE media_path = '".$this->path."' ".
		'AND media_id = '.(integer) $id.' ';
		
		if (!$this->core->auth->check('media_admin',$this->core->blog->id))
		{
			$strReq .= 'AND (media_private <> 1 ';
			
			if ($this->core->auth->userID()) {
				$strReq .= "OR user_id = '".$this->con->escape($this->core->auth->userID())."'";
			}
			$strReq .= ') ';
		}
		
		$rs = $this->con->select($strReq);
		return $this->fileRecord($rs);
	}
	
	/**
	Returns media items attached to a blog post. Result is an array containing
	fileItems objects.
	
	@param	post_id	<b>integer</b>		Post ID
	@param	media_id	<b>integer</b>		Optionnal media ID
	@return	<b>array</b> Array of fileItems
	*/
	public function getPostMedia($post_id,$media_id=null)
	{
		$post_id = (integer) $post_id;
		
		$strReq =
		'SELECT media_file, M.media_id, media_path, media_title, media_meta, media_dt, '.
		'media_creadt, media_upddt, media_private, user_id '.
		'FROM '.$this->table.' M, '.$this->table_ref.' PM '.
		"WHERE media_path = '".$this->path."' ".
		'AND M.media_id = PM.media_id '.
		'AND post_id = '.$post_id.' ';
		
		if ($media_id) {
			$strReq .= 'AND M.media_id = '.(integer) $media_id.' ';
		}
		
		$rs = $this->con->select($strReq);
		
		$res = array();
		
		while ($rs->fetch()) {
			$f = $this->fileRecord($rs);
			if ($f !== null) {
				$res[] = $f;
			}
		}
		
		return $res;
	}
	
	/**
	Attaches a media to a post.
	
	@param	post_id	<b>integer</b>		Post ID
	@param	media_id	<b>integer</b>		Optionnal media ID
	*/
	public function addPostMedia($post_id,$media_id)
	{
		$post_id = (integer) $post_id;
		$media_id = (integer) $media_id;
		
		$f = $this->getPostMedia($post_id,$media_id);
		
		if (!empty($f)) {
			return;
		}
		
		$cur = $this->con->openCursor($this->table_ref);
		$cur->post_id = $post_id;
		$cur->media_id = $media_id;
		
		$cur->insert();
		$this->core->blog->triggerBlog();
	}
	
	/**
	Detaches a media from a post.
	
	@param	post_id	<b>integer</b>		Post ID
	@param	media_id	<b>integer</b>		Optionnal media ID
	*/
	public function removePostMedia($post_id,$media_id)
	{
		$post_id = (integer) $post_id;
		$media_id = (integer) $media_id;
		
		$strReq = 'DELETE FROM '.$this->table_ref.' '.
				'WHERE post_id = '.$post_id.' '.
				'AND media_id = '.$media_id.' ';
		
		$this->con->execute($strReq);
		$this->core->blog->triggerBlog();
	}
	
	/**
	Rebuilds database items collection. Optional <var>$pwd</var> parameter is
	the path where to start rebuild.
	
	@param	pwd		<b>string</b>		Directory to rebuild
	*/
	public function rebuild($pwd='')
	{
		if (!$this->core->auth->isSuperAdmin()) {
			throw new Exception(__('You are not a super administrator.'));
		}
		
		$this->chdir($pwd);
		parent::getDir();
		
		$dir = $this->dir;
		
		foreach ($dir['dirs'] as $d) {
			if (!$d->parent) {
				$this->rebuild($d->relname,false);
			}
		}
		
		foreach ($dir['files'] as $f) {
			$this->chdir(dirname($f->relname));
			$this->createFile($f->basename);
		}
		
		$this->rebuildDB($pwd);
	}
	
	protected function rebuildDB($pwd)
	{
		$media_dir = $pwd ? $pwd : '.';
		
		$strReq =
		'SELECT media_file, media_id '.
		'FROM '.$this->table.' '.
		"WHERE media_path = '".$this->path."' ".
		"AND media_dir = '".$this->con->escape($media_dir)."' ";
		
		$rs = $this->con->select($strReq);
		
		$delReq = 'DELETE FROM '.$this->table.' '.
				'WHERE media_id IN (%s) ';
		$del_ids = array();
		
		while ($rs->fetch())
		{
			if (!is_file($this->root.'/'.$rs->media_file)) {
				$del_ids[] = (integer) $rs->media_id;
			}
		}
		
		if (!empty($del_ids)) {
			$this->con->execute(sprintf($delReq,implode(',',$del_ids)));
		}
	}
	
	/**
	Creates or updates a file in database. Returns new media ID or false if
	file does not exist.
	
	@param	name		<b>string</b>		File name (relative to working directory)
	@param	title	<b>string</b>		File title
	@param	private	<b>boolean</b>		File is private
	@param	dt		<b>string</b>		File date
	@return	<b>integer</b> New media ID
	*/
	public function createFile($name,$title=null,$private=false,$dt=null)
	{
		if (!$this->core->auth->check('media,media_admin',$this->core->blog->id)) {
			throw new Exception(__('Permission denied.'));
		}
		
		$file = $this->pwd.'/'.$name;
		if (!file_exists($file)) {
			return false;
		}
		
		$media_file = $this->relpwd ? path::clean($this->relpwd.'/'.$name) : path::clean($name);
		$media_type = files::getMimeType($name);
		
		$cur = $this->con->openCursor($this->table);
		
		$strReq = 'SELECT media_id '.
				'FROM '.$this->table.' '.
				"WHERE media_path = '".$this->con->escape($this->path)."' ".
				"AND media_file = '".$this->con->escape($media_file)."' ";
		
		$rs = $this->con->select($strReq);
		
		if ($rs->isEmpty())
		{
			$rs = $this->con->select('SELECT MAX(media_id) FROM '.$this->table);
			$media_id = (integer) $rs->f(0) + 1;
			
			$cur->media_id = $media_id;
			$cur->user_id = (string) $this->core->auth->userID();
			$cur->media_path = (string) $this->path;
			$cur->media_file = (string) $media_file;
			$cur->media_dir = (string) dirname($media_file);
			$cur->media_creadt = array('NOW()');
			$cur->media_upddt = array('NOW()');
			
			$cur->media_title = !$title ? (string) $name : (string) $title;
			$cur->media_private = (integer) (boolean) $private;
			
			if ($dt) {
				$cur->media_dt = (string) $dt;
			} else {
				$cur->media_dt = strftime('%Y-%m-%d %H:%M:%S',filemtime($file));
			}
			
			try {
				$cur->insert();
			} catch (Exception $e) {
				@unlink($name);
				throw $e;
			}
		}
		else
		{
			$media_id = (integer) $rs->media_id;
			
			$cur->media_upddt = array('NOW()');
			
			$cur->update('WHERE media_id = '.$media_id);
		}
		
		$this->callFileHandler($media_type,'create',$cur,$name,$media_id);
		
		return $media_id;
	}
	
	/**
	Updates a file in database.
	
	@param	file		<b>fileItem</b>	Current fileItem object
	@param	newFile	<b>fileItem</b>	New fileItem object
	*/
	public function updateFile($file,$newFile)
	{
		if (!$this->core->auth->check('media,media_admin',$this->core->blog->id)) {
			throw new Exception(__('Permission denied.'));
		}
		
		$id = (integer) $file->media_id;
		
		if (!$id) {
			throw new Exception('No file ID');
		}
		
		if (!$this->core->auth->check('media_admin',$this->core->blog->id)
		&& $this->core->auth->userID() != $file->media_user) {
			throw new Exception(__('You are not the file owner.'));
		}
		
		$cur = $this->con->openCursor($this->table);
		
		# We need to tidy newFile basename. If dir isn't empty, concat to basename
		$newFile->relname = files::tidyFileName($newFile->basename);
		if ($newFile->dir) {
			$newFile->relname = $newFile->dir.'/'.$newFile->relname;
		}
		
		if ($file->relname != $newFile->relname) {
			$newFile->file = $this->root.'/'.$newFile->relname;
			
			if (file_exists($newFile->file)) {
				throw new Exception(__('New file already exists.'));
			}
			
			$this->moveFile($file->relname,$newFile->relname);
			
			$cur->media_file = (string) $newFile->relname;
			$cur->media_dir = (string) dirname($newFile->relname);
		}
		
		$cur->media_title = (string) $newFile->media_title;
		$cur->media_dt = (string) $newFile->media_dtstr;
		$cur->media_upddt = array('NOW()');
		$cur->media_private = (integer) $newFile->media_priv;
		
		$cur->update('WHERE media_id = '.$id);
		
		$this->callFileHandler($file->type,'update',$file,$newFile);
	}
	
	/**
	Uploads a file.
	
	@param	tmp		<b>string</b>		Full path of temporary uploaded file
	@param	name		<b>string</b>		File name (relative to working directory)
	@param	title	<b>string</b>		File title
	@param	private	<b>boolean</b>		File is private
	*/
	public function uploadFile($tmp,$name,$title=null,$private=false)
	{
		if (!$this->core->auth->check('media,media_admin',$this->core->blog->id)) {
			throw new Exception(__('Permission denied.'));
		}
		
		$name = files::tidyFileName($name);
		
		parent::uploadFile($tmp,$name);
		
		return $this->createFile($name,$title,$private);
	}
	
	/**
	Creates a file from binary content.
	
	@param	name		<b>string</b>		File name (relative to working directory)
	@param	bits		<b>string</b>		Binary file content
	*/
	public function uploadBits($name,$bits)
	{
		if (!$this->core->auth->check('media,media_admin',$this->core->blog->id)) {
			throw new Exception(__('Permission denied.'));
		}
		
		$name = files::tidyFileName($name);
		
		parent::uploadBits($name,$bits);
		
		return $this->createFile($name,null,null);
	}
	
	/**
	Removes a file.
	
	@param	f		<b>fileItem</b>	fileItem object
	*/
	public function removeFile($f)
	{
		if (!$this->core->auth->check('media,media_admin',$this->core->blog->id)) {
			throw new Exception(__('Permission denied.'));
		}
		
		$media_file = $this->relpwd ? path::clean($this->relpwd.'/'.$f) : path::clean($f);
		
		$strReq = 'DELETE FROM '.$this->table.' '.
				"WHERE media_path = '".$this->con->escape($this->path)."' ".
				"AND media_file = '".$this->con->escape($media_file)."' ";
		
		if (!$this->core->auth->check('media_admin',$this->core->blog->id))
		{
			$strReq .= "AND user_id = '".$this->con->escape($this->core->auth->userID())."'";
		}
		
		$this->con->execute($strReq);
		
		if ($this->con->changes() == 0) {
			throw new Exception(__('File does not exist in the database.'));
		}
		
		parent::removeFile($f);
		
		$this->callFileHandler(files::getMimeType($media_file),'remove',$f);
	}
	
	
	/* Image handlers
	------------------------------------------------------- */
	protected function imageThumbCreate(&$cur,$f)
	{
		$file = $this->pwd.'/'.$f;
		
		if (!file_exists($file)) {
			return false;
		}
		
		$p = path::info($file);
		$thumb = sprintf($this->thumb_tp,$p['dirname'],$p['base'],'%s');
		
		try {
			$img = new imageTools();
			$img->loadImage($file);
			
			$w = $img->getW();
			$h = $img->getH();
			
			foreach ($this->thumb_sizes as $suffix => $s) {
				if ($suffix == 'sq' || ($w > $s[0] && $h > $s[0])) {
					$img->resize($s[0],$s[0],$s[1]);
					$img->output('jpeg',sprintf($thumb,$suffix),80);
				}
			}
			
		} catch (Exception $e) {}
	}
	
	protected function imageThumbUpdate(&$file,&$newFile)
	{
		if ($file->relname != $newFile->relname)
		{
			$p = path::info($file->relname);
			$thumb_old = sprintf($this->thumb_tp,$p['dirname'],$p['base'],'%s');
			
			$p = path::info($newFile->relname);
			$thumb_new = sprintf($this->thumb_tp,$p['dirname'],$p['base'],'%s');
			
			foreach ($this->thumb_sizes as $suffix => $s) {
				try {
					parent::moveFile(sprintf($thumb_old,$suffix),sprintf($thumb_new,$suffix));
				} catch (Exception $e) {}
			}
		}
	}
	
	protected function imageThumbRemove($f)
	{
		$p = path::info($f);
		$thumb = sprintf($this->thumb_tp,'',$p['base'],'%s');
		
		foreach ($this->thumb_sizes as $suffix => $s) {
			try {
				parent::removeFile(sprintf($thumb,$suffix));
			} catch (Exception $e) {}
		}
	}
	
	protected function imageMetaCreate(&$cur,$f,$id)
	{
		$file = $this->pwd.'/'.$f;
		
		if (!file_exists($file)) {
			return false;
		}
		
		$xml = new xmlTag('meta');
		$meta = imageMeta::readMeta($file);
		$xml->insertNode($meta);
		
		$c = $this->core->con->openCursor($this->table);
		$c->media_meta = $xml->toXML();
		
		if ($meta['Title']) {
			$c->media_title = $meta['Title'];
		} elseif ($meta['Description']) {
			$c->media_title = $meta['Description'];
		}
		
		if ($meta['DateTimeOriginal'])
		{
			# We set picture time to user timezone
			$media_ts = strtotime($meta['DateTimeOriginal']);
			if ($media_ts !== false) {
				$o = dt::getTimeOffset($this->core->auth->getInfo('user_tz'),$media_ts);
				$c->media_dt = dt::str('%Y-%m-%d %H:%M:%S',$media_ts+$o);
			}
		}
		
		$c->update('WHERE media_id = '.$id);
	}
	
	/**
	Returns HTML code for MP3 player
	
	@param	url		<b>string</b>		MP3 URL to play
	@param	player	<b>string</b>		Player URL
	@return	<b>string</b>
	*/
	public function mp3player($url,$player='player_mp3.swf')
	{
		$args = $player.'?mp3='.$url.
		'&amp;loadingcolor=ff9900'.
		'&amp;bgcolor1=eeeeee'.
		'&amp;bgcolor2=cccccc'.
		'&amp;buttoncolor=0066cc'.
		'&amp;buttonovercolor=ff9900'.
		'&amp;slidercolor1=cccccc'.
		'&amp;slidercolor2=999999'.
		'&amp;sliderovercolor=0066cc';
		
		return
		'<object type="application/x-shockwave-flash" '.
		'data="'.$args.'" '.
		'width="200" height="20">'.
		'<param name="movie" value="'.$args.'" />'.
		'<param name="wmode" value="transparent" />'.
		'</object>';
	}
	
	public function flvplayer($url,$player='player_flv.swf')
	{
		$args = 'flv='.$url.
		'&amp;width=400'.
		'&amp;height=300'.
		'&amp;margin=1'.
		'&amp;showvolume=1'.
		'&amp;showtime=1';
		
		return
		'<object type="application/x-shockwave-flash" '.
		'data="'.$player.'" '.
		'width="400" height="300">'.
		'<param name="movie" value="'.$player.'" />'.
		'<param name="FlashVars" value="'.$args.'" />'.
		'</object>';
	}
}
?>