<?php

/**

 * $Id: Logger.class.php 10 2007-05-27 10:55:12Z spocke $

 *

 * @package MCFileManager.filesystems

 * @author Moxiecode

 * @copyright Copyright � 2005, Moxiecode Systems AB, All rights reserved.

 */

// File type contstants

define('MC_LOGGER_DEBUG', 0);

define('MC_LOGGER_INFO', 10);

define('MC_LOGGER_WARN', 20);

define('MC_LOGGER_ERROR', 30);

define('MC_LOGGER_FATAL', 40);

/**

 * Logging utility class. This class handles basic logging with levels, log rotation and custom log formats. It's

 * designed to be compact but still powerful and flexible.

 */

class Moxiecode_Logger {

	// Private fields

	var $_path;

	var $_filename;

	var $_maxSize;

	var $_maxFiles;

	var $_maxSizeBytes;

	var $_level;

	var $_format;

	/**

	 * Constructs a new logger instance.

	 */

	function Moxiecode_Logger() {

		$this->_path = "";

		$this->_filename = "{level}.log";

		$this->setMaxSize("100k");

		$this->_maxFiles = 10;

		$this->_level = MC_LOGGER_DEBUG;

		$this->_format = "[{time}] [{level}] {message}";

	}

	/**

	 * Sets the current log level, use the MC_LOGGER constants.

	 *

	 * @param int $level Log level instance for example MC_LOGGER_DEBUG.

	 */

	function setLevel($level) {

		if (is_string($level)) {

			switch (strtolower($level)) {

				case "debug":

					$level = MC_LOGGER_DEBUG;

					break;

				case "info":

					$level = MC_LOGGER_INFO;

					break;

				case "warn":

				case "warning":

					$level = MC_LOGGER_WARN;

					break;

				case "error":

					$level = MC_LOGGER_ERROR;

					break;

				case "fatal":

					$level = MC_LOGGER_FATAL;

					break;

				default:

					$level = MC_LOGGER_FATAL;

			}

		}

		$this->_level = $level;

	}

	/**

	 * Returns the current log level for example MC_LOGGER_DEBUG.

	 *

	 * @return int Current log level for example MC_LOGGER_DEBUG.

	 */

	function getLevel() {

		return $this->_level;

	}

	function setPath($path) {

		$this->_path = $path;

	}

	function getPath() {

		return $this->_path;

	}

	function setFileName($file_name) {

		$this->_filename = $file_name;

	}

	function getFileName() {

		return $this->_filename;

	}

	function setFormat($format) {

		$this->_format = $format;

	}

	function getFormat() {

		return $this->_format;

	}

	function setMaxSize($size) {

		// Fix log max size

		$logMaxSizeBytes = intval(preg_replace("/[^0-9]/", "", $size));

		// Is KB

		if (strpos((strtolower($size)), "k") > 0)

			$logMaxSizeBytes *= 1024;

		// Is MB

		if (strpos((strtolower($size)), "m") > 0)

			$logMaxSizeBytes *= (1024 * 1024);

		$this->_maxSizeBytes = $logMaxSizeBytes;

		$this->_maxSize = $size;

	}

	function getMaxSize() {

		return $this->_maxSize;

	}

	function setMaxFiles($max_files) {

		$this->_maxFiles = $max_files;

	}

	function getMaxFiles() {

		return $this->_maxFiles;

	}

	function debug($msg) {

		$args = func_get_args();

		$this->_logMsg(MC_LOGGER_DEBUG, implode(', ', $args));

	}

	function info($msg) {

		$args = func_get_args();

		$this->_logMsg(MC_LOGGER_INFO, implode(', ', $args));

	}

	function warn($msg) {

		$args = func_get_args();

		$this->_logMsg(MC_LOGGER_WARN, implode(', ', $args));

	}

	function error($msg) {

		$args = func_get_args();

		$this->_logMsg(MC_LOGGER_ERROR, implode(', ', $args));

	}

	function fatal($msg) {

		$args = func_get_args();

		$this->_logMsg(MC_LOGGER_FATAL, implode(', ', $args));

	}

	function isDebugEnabled() {

		return $this->_level >= MC_LOGGER_DEBUG;

	}

	function isInfoEnabled() {

		return $this->_level >= MC_LOGGER_INFO;

	}

	function isWarnEnabled() {

		return $this->_level >= MC_LOGGER_WARN;

	}

	function isErrorEnabled() {

		return $this->_level >= MC_LOGGER_ERROR;

	}

	function isFatalEnabled() {

		return $this->_level >= MC_LOGGER_FATAL;

	}

	function _logMsg($level, $message) {

		$roll = false;

		if ($level < $this->_level)

			return;

		$logFile = $this->toOSPath($this->_path . "/" . $this->_filename);

		switch ($level) {

			case MC_LOGGER_DEBUG:

				$levelName = "DEBUG";

				break;

			case MC_LOGGER_INFO:

				$levelName = "INFO";

				break;

			case MC_LOGGER_WARN:

				$levelName = "WARN";

				break;

			case MC_LOGGER_ERROR:

				$levelName = "ERROR";

				break;

			case MC_LOGGER_FATAL:

				$levelName = "FATAL";

				break;

		}

		$logFile = str_replace('{level}', strtolower($levelName), $logFile);

		$text = $this->_format;

		$text = str_replace('{time}', date("Y-m-d H:i:s"), $text);

		$text = str_replace('{level}', strtolower($levelName), $text);

		$text = str_replace('{message}', $message, $text);

		$message = $text . "\r\n";

		// Check filesize

		if (file_exists($logFile)) {

			$size = @filesize($logFile);

			if ($size + strlen($message) > $this->_maxSizeBytes)

				$roll = true;

		}

		// Roll if the size is right

		if ($roll) {

			for ($i=$this->_maxFiles-1; $i>=1; $i--) {

				$rfile = $this->toOSPath($logFile . "." . $i);

				$nfile = $this->toOSPath($logFile . "." . ($i+1));

				if (@file_exists($rfile))

					@rename($rfile, $nfile);

			}

			@rename($logFile, $this->toOSPath($logFile . ".1"));

			// Delete last logfile

			$delfile = $this->toOSPath($logFile . "." . ($this->_maxFiles + 1));

			if (@file_exists($delfile))

				@unlink($delfile);

		}

		// Append log line

		if (($fp = @fopen($logFile, "a")) != null) {

			@fputs($fp, $message);

			@fflush($fp);

			@fclose($fp);

		}

	}

	/**

	 * Converts a Unix path to OS specific path.

	 *

	 * @param String $path Unix path to convert.

	 */

	function toOSPath($path) {

		return str_replace("/", DIRECTORY_SEPARATOR, $path);

	}

}