File Manager

<?php
/*
* 2007-2014 PrestaShop
*
* NOTICE OF LICENSE
*
* This source file is subject to the Open Software License (OSL 3.0)
* that is bundled with this package in the file LICENSE.txt.
* It is also available through the world-wide-web at this URL:
* http://opensource.org/licenses/osl-3.0.php
* If you did not receive a copy of the license and are unable to
* obtain it through the world-wide-web, please send an email
* to license@prestashop.com so we can send you a copy immediately.
*
* DISCLAIMER
*
* Do not edit or add to this file if you wish to upgrade PrestaShop to newer
* versions in the future. If you wish to customize PrestaShop for your
* needs please refer to http://www.prestashop.com for more information.
*
*  @author PrestaShop SA <contact@prestashop.com>
*  @copyright  2007-2014 PrestaShop SA
*  @license    http://opensource.org/licenses/osl-3.0.php  Open Software License (OSL 3.0)
*  International Registered Trademark & Property of PrestaShop SA
*/
class FileLoggerCore extends AbstractLogger
{
	protected $filename = '';

	/**
	* Write the message in the log file
	*
	* @param string message
	* @param level
	*/
	protected function logMessage($message, $level)
	{
		$formatted_message = '*'.$this->level_value[$level].'* '."\t".date('Y/m/d - H:i:s').': '.$message."\r\n";
		return (bool)file_put_contents($this->getFilename(), $formatted_message, FILE_APPEND);
	}

	/**
	* Check if the specified filename is writable and set the filename
	*
	* @param string filename
	*/
	public function setFilename($filename)
	{
		if (is_writable(dirname($filename)))
			$this->filename = $filename;
		else
			die('Directory '.dirname($filename).' is not writable');
	}

	/**
	* Log the message
	*
	* @param string message
	* @param level
	*/
	public function getFilename()
	{
		if (empty($this->filename))
			die('Filename is empty.');

		return $this->filename;
	}
}