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<?php
/**
* TLogger class file
*
* @author Qiang Xue <qiang.xue@gmail.com>
* @link http://www.pradosoft.com/
* @copyright Copyright © 2005-2011 PradoSoft
* @license http://www.pradosoft.com/license/
* @version $Id$
* @package System.Util
*/
/**
* TLogger class.
*
* TLogger records log messages in memory and implements the methods to
* retrieve the messages with filter conditions, including log levels,
* log categories, and by control.
*
* @author Qiang Xue <qiang.xue@gmail.com>
* @version $Id$
* @package System.Util
* @since 3.0
*/
class TLogger extends TComponent
{
/**
* Log levels.
*/
const DEBUG=0x01;
const INFO=0x02;
const NOTICE=0x04;
const WARNING=0x08;
const ERROR=0x10;
const ALERT=0x20;
const FATAL=0x40;
/**
* @var array log messages
*/
private $_logs=array();
/**
* @var integer log levels (bits) to be filtered
*/
private $_levels;
/**
* @var array list of categories to be filtered
*/
private $_categories;
/**
* @var array list of control client ids to be filtered
*/
private $_controls;
/**
* Logs a message.
* Messages logged by this method may be retrieved via {@link getLogs}.
* @param string message to be logged
* @param integer level of the message. Valid values include
* TLogger::DEBUG, TLogger::INFO, TLogger::NOTICE, TLogger::WARNING,
* TLogger::ERROR, TLogger::ALERT, TLogger::FATAL.
* @param string category of the message
* @param string|TControl control of the message
*/
public function log($message,$level,$category='Uncategorized', $ctl=null)
{
if($ctl) {
if($ctl instanceof TControl)
$ctl = $ctl->ClientId;
else if(!is_string($ctl))
$ctl = null;
} else
$ctl = null;
$this->_logs[]=array($message,$level,$category,microtime(true),memory_get_usage(),$ctl);
}
/**
* Retrieves log messages.
* Messages may be filtered by log levels and/or categories and/or control client ids.
* A level filter is specified by an integer, whose bits indicate the levels interested.
* For example, (TLogger::INFO | TLogger::WARNING) specifies INFO and WARNING levels.
* A category filter is specified by an array of categories to filter.
* A message whose category name starts with any filtering category
* will be returned. For example, a category filter array('System.Web','System.IO')
* will return messages under categories such as 'System.Web', 'System.IO',
* 'System.Web.UI', 'System.Web.UI.WebControls', etc.
* A control client id filter is specified by an array of control client id
* A message whose control client id starts with any filtering naming panels
* will be returned. For example, a category filter array('ctl0_body_header',
* 'ctl0_body_content_sidebar')
* will return messages under categories such as 'ctl0_body_header', 'ctl0_body_content_sidebar',
* 'ctl0_body_header_title', 'ctl0_body_content_sidebar_savebutton', etc.
* Level filter, category filter, and control filter are combinational, i.e., only messages
* satisfying all filter conditions will they be returned.
* @param integer level filter
* @param array category filter
* @param array control filter
* @return array list of messages. Each array elements represents one message
* with the following structure:
* array(
* [0] => message
* [1] => level
* [2] => category
* [3] => timestamp (by microtime(), float number));
* [4] => memory in bytes
* [5] => control client id
*/
public function getLogs($levels=null,$categories=null,$controls=null)
{
$this->_levels=$levels;
$this->_categories=$categories;
$this->_controls=$controls;
if(empty($levels) && empty($categories) && empty($controls))
return $this->_logs;
$logs = $this->_logs;
if(!empty($levels))
$logs = array_values(array_filter( array_filter($logs,array($this,'filterByLevels')) ));
if(!empty($categories))
$logs = array_values(array_filter( array_filter($logs,array($this,'filterByCategories')) ));
if(!empty($controls))
$logs = array_values(array_filter( array_filter($logs,array($this,'filterByControl')) ));
return $logs;
}
/**
* Filter function used by {@link getLogs}.
* @param array element to be filtered
*/
private function filterByCategories($value)
{
foreach($this->_categories as $category)
{
// element 2 is the category
if($value[2]===$category || strpos($value[2],$category.'.')===0)
return $value;
}
return false;
}
/**
* Filter function used by {@link getLogs}
* @param array element to be filtered
*/
private function filterByLevels($value)
{
// element 1 are the levels
if($value[1] & $this->_levels)
return $value;
else
return false;
}
/**
* Filter function used by {@link getLogs}
* @param array element to be filtered
*/
private function filterByControl($ctl)
{
// element 5 are the control client ids
foreach($this->_controls as $control)
{
if($value[5]===$control || strpos($value[5],$control)===0)
return $value;
}
return false;
}
}
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