<?php
/**
* This file is part of the PHP Generics package.
*
* @package Generics
*/
namespace Generics\Logger;
use Generics\Streams\FileOutputStream;
/**
* This class is a standard reference implementation of the PSR LoggerInterface.
*
* @author Maik Greubel <[email protected]>
*/
class SimpleLogger extends BasicLogger
{
/**
* The log file path
*
* @var string
*/
private $file = null;
/**
* The maximum log file size in megabyte
*
* @var int
*/
private $maxLogSize;
/**
* Create a new SimpleLogger instance
*
* @param string $logFilePath
* The path to the log file.
* @param int $maxLogSize
* The maximum log file size before it is rotated.
*/
public function __construct($logFilePath = 'application.log', $maxLogSize = 2)
{
$this->file = $logFilePath;
$this->maxLogSize = intval($maxLogSize);
if ($this->maxLogSize < 1 || $this->maxLogSize > 50) {
$this->maxLogSize = 2;
}
}
/**
* This function provides the real logging function.
*
* First the log file size is checked.
* When the maximum size has reached, the file will be overwritten.
* Otherwise the log string is appended.
*
* @param integer $level
* The arbitrary level
* @param string $message
* The message to log
* @param array $context
* The context of logging
*/
protected function logImpl($level, $message, array $context = array())
{
if (! $this->levelHasReached($level)) {
return;
}
if ($this->isRotationNeeded()) {
unlink($this->file);
}
$ms = $this->getMessage($level, $message, $context);
$fos = new FileOutputStream($this->file, true);
$fos->write($ms);
$fos->flush();
$fos->close();
}
/**
* Checks whether a rotation of log file is necessary
*
* @return boolean true in case of its necessary, false otherwise
*/
private function isRotationNeeded()
{
clearstatcache();
if (! file_exists($this->file)) {
return false;
}
$result = false;
$attributes = stat($this->file);
if ($attributes == false || $attributes['size'] >= $this->maxLogSize * 1024 * 1024) {
$result = true;
}
return $result;
}
/**
* Retrieve the file name of logger
*
* @return string
*/
public function getFile()
{
return $this->file;
}
/**
* Retrieve the maximum size of log file in megabytes
*
* @return int
*/
public function getMaxLogSize()
{
return $this->maxLogSize;
}
}
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