<?php
  /**
   * Copyright (c) 2013 Bart Visscher <bartv@thisnet.nl>
   * This file is licensed under the Affero General Public License version 3 or
   * later.
   * See the COPYING-README file.
   */
  
  namespace OC\Log;
  
  /**
   * This rotates the current logfile to a new name, this way the total log usage
   * will stay limited and older entries are available for a while longer.
   * For more professional log management set the 'logfile' config to a different
   * location and manage that with your own tools.
   */
  class Rotate extends \OC\BackgroundJob\Job {
  	private $max_log_size;
  	public function run($logFile) {
  		$this->max_log_size = \OC_Config::getValue('log_rotate_size', false);
  		if ($this->max_log_size) {
  			$filesize = @filesize($logFile);
  			if ($filesize >= $this->max_log_size) {
  				$this->rotate($logFile);
  			}
  		}
  	}
  
  	protected function rotate($logfile) {
  		$rotatedLogfile = $logfile.'.1';
  		rename($logfile, $rotatedLogfile);
  		$msg = 'Log file "'.$logfile.'" was over '.$this->max_log_size.' bytes, moved to "'.$rotatedLogfile.'"';
  		\OC_Log::write('OC\Log\Rotate', $msg, \OC_Log::WARN);
  	}
  }