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<?php
/**
* TAssetManager class
*
* @author Qiang Xue <qiang.xue@gmail.com>
* @link http://www.pradosoft.com/
* @copyright Copyright © 2005 PradoSoft
* @license http://www.pradosoft.com/license/
* @version $Revision: $ $Date: $
* @package System.Web
*/
/**
* TAssetManager class
*
* TAssetManager provides a scheme to allow web clients visiting
* private files that are normally web-inaccessible.
*
* TAssetManager will copy the file to be published into a web-accessible
* directory. The default base directory for storing the file is "assets", which
* should be under the application directory. This can be changed by setting
* the BasePath property together with the BaseUrl property that refers to
* the URL for accessing the base path.
*
* By default, TAssetManager will not publish a file or directory if it already
* exists in the publishing directory. You may require a timestamp checking by
* setting CheckTimestamp to true (which is false by default). You may also require
* so when calling {@link publishFile} or {@link publishDirectory). This is usually
* very useful during development. In production sites, the timestamp checking
* should be turned off to improve performance.
*
* @author Qiang Xue <qiang.xue@gmail.com>
* @version $Revision: $ $Date: $
* @package System.Web
* @since 3.0
*/
class TAssetManager extends TComponent implements IModule
{
/**
* Default web accessible base path for storing private files
*/
const DEFAULT_BASEPATH='assets';
/**
* @var string base web accessible path for storing private files
*/
private $_basePath=null;
/**
* @var string base URL for accessing the publishing directory.
*/
private $_baseUrl=null;
/**
* @var string module ID
*/
private $_id;
/**
* @var boolean whether to use timestamp checking to ensure files are published with up-to-date versions.
*/
private $_checkTimestamp=false;
/**
* Initializes the module.
* This method is required by IModule and is invoked by application.
* @param IApplication application
* @param TXmlElement module configuration
*/
public function init($application,$config)
{
if($this->_basePath===null)
$this->_basePath=dirname($application->getRequest()->getPhysicalApplicationPath()).'/'.self::DEFAULT_BASEPATH;
if(!is_writable($this->_basePath) || !is_dir($this->_basePath))
throw new TConfigurationException('assetmanager_basepath_invalid',$this->_basePath);
if($this->_baseUrl===null)
$this->_baseUrl=dirname($application->getRequest()->getApplicationPath()).'/'.self::DEFAULT_BASEPATH;
}
/**
* @return string id of this module
*/
public function getID()
{
return $this->_id;
}
/**
* @param string id of this module
*/
public function setID($value)
{
$this->_id=$value;
}
/**
* @return string the root directory storing published asset files
*/
public function getBasePath()
{
return $this->_basePath;
}
/**
* @param string the root directory storing published asset files
* @throws TInvalidOperationException if the service is initialized already
*/
public function setBasePath($value)
{
if($this->_initialized)
throw new TInvalidOperationException('assetmanager_basepath_unchangeable');
else if(is_dir($value))
$this->_basePath=realpath($value);
else
throw new TInvalidDataValueException('assetmanage_basepath_invalid',$value);
}
/**
* @return string the base url that the published asset files can be accessed
*/
public function getBaseUrl()
{
return $this->_baseUrl;
}
/**
* @param string the base url that the published asset files can be accessed
* @throws TInvalidOperationException if the service is initialized already
*/
public function setBaseUrl($value)
{
if($this->_initialized)
throw new TInvalidOperationException('pageservice_baseurl_unchangeable');
else
$this->_baseUrl=$value;
}
/**
* @return boolean whether file modify time should be used to ensure a published file is latest. Defaults to false.
*/
public function getCheckTimestamp()
{
return $this->_checkTimestamp;
}
/**
* @param boolean whether file modify time should be used to ensure a published file is latest. Defaults to false.
*/
public function setCheckTimestamp($value)
{
if($this->_initialized)
throw new TInvalidOperationException('pageservice_checktimestamp_unchangeable');
else
$this->_checkTimestamp=TPropertyValue::ensureBoolean($value);
}
/**
* Publishes a directory (recursively).
* This method will copy the content in a directory (recursively) to
* a web accessible directory and returns the URL for the directory.
* @param string the path to be published
* @param boolean whether to use file modify time to ensure every published file is latest
* @return string an absolute URL to the published directory
*/
public function publishDirectory($path,$checkTimestamp=false)
{
if(($fullpath=realpath($path))!==false && is_dir($fullpath))
{
$dir=md5($fullpath);
if(!is_dir($this->_basePath.'/'.$dir) || $checkTimestamp || $this->_checkTimestamp)
$this->copyDirectory($fullpath,$this->_basePath.'/'.$dir);
return $this->_baseUrl.'/'.$dir;
}
else
throw new TInvalidDataValueException('assetmanager_directory_invalid',$path);
}
/**
* Copies a directory recursively as another.
* If the destination directory does not exist, it will be created.
* File modification time is used to ensure the copied files are latest.
* @param string the source directory
* @param string the destination directory
*/
protected function copyDirectory($src,$dst)
{
@mkdir($dst);
$folder=opendir($src);
while($file=readdir($folder))
{
if($file==='.' || $file==='..')
continue;
else if(is_file($src.'/'.$file))
{
if(@filemtime($dst.'/'.$file)<filemtime($src.'/'.$file))
copy($src.'/'.$file,$dst.'/'.$file);
}
else
$this->copyDirectory($src.'/'.$file,$dst.'/'.$file);
}
closedir($folder);
}
/**
* Publishes a file.
* This method will copy a file to a web accessible directory and
* returns the URL for the file.
* @param string the file to be published
* @param boolean whether to use file modify time to ensure the published file is latest
* @return string an absolute URL to the published file
*/
public function publishFile($path,$checkTimestamp=false)
{
if(($fullpath=realpath($path))!==false && is_file($fullpath))
{
$dir=md5(dirname($fullpath));
$file=$this->_basePath.'/'.$dir.'/'.basename($fullpath);
if(!is_file($file) || (($checkTimestamp || $this->_checkTimestamp) && filemtime($file)<filemtime($path)))
{
@mkdir($this->_basePath.'/'.$dir);
copy($fullpath,$file);
}
return $this->_baseUrl.'/'.$dir.'/'.basename($fullpath);
}
else
throw new TInvalidDataValueException('assetmanager_file_invalid',$path);
}
}
?>
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