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<?php
/**
* Slim - a micro PHP 5 framework
*
* @author Josh Lockhart <info@slimframework.com>
* @copyright 2011 Josh Lockhart
* @link http://www.slimframework.com
* @license http://www.slimframework.com/license
* @version 2.0.0
* @package Slim
*
* MIT LICENSE
*
* Permission is hereby granted, free of charge, to any person obtaining
* a copy of this software and associated documentation files (the
* "Software"), to deal in the Software without restriction, including
* without limitation the rights to use, copy, modify, merge, publish,
* distribute, sublicense, and/or sell copies of the Software, and to
* permit persons to whom the Software is furnished to do so, subject to
* the following conditions:
*
* The above copyright notice and this permission notice shall be
* included in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
* LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
* OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
* WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*/
namespace Slim;
/**
* Log
*
* This is the primary logger for a Slim application. You may provide
* a Log Writer in conjunction with this Log to write to various output
* destinations (e.g. a file). This class provides this interface:
*
* debug( mixed $object )
* info( mixed $object )
* warn( mixed $object )
* error( mixed $object )
* fatal( mixed $object )
*
* This class assumes only that your Log Writer has a public `write()` method
* that accepts any object as its one and only argument. The Log Writer
* class may write or send its argument anywhere: a file, STDERR,
* a remote web API, etc. The possibilities are endless.
*
* @package Slim
* @author Josh Lockhart
* @since 1.0.0
*/
class Log
{
const FATAL = 0;
const ERROR = 1;
const WARN = 2;
const INFO = 3;
const DEBUG = 4;
/**
* @var array
*/
protected static $levels = array(
self::FATAL => 'FATAL',
self::ERROR => 'ERROR',
self::WARN => 'WARN',
self::INFO => 'INFO',
self::DEBUG => 'DEBUG'
);
/**
* @var mixed
*/
protected $writer;
/**
* @var bool
*/
protected $enabled;
/**
* @var int
*/
protected $level;
/**
* Constructor
* @param mixed $writer
*/
public function __construct($writer)
{
$this->writer = $writer;
$this->enabled = true;
$this->level = self::DEBUG;
}
/**
* Is logging enabled?
* @return bool
*/
public function getEnabled()
{
return $this->enabled;
}
/**
* Enable or disable logging
* @param bool $enabled
*/
public function setEnabled($enabled)
{
if ($enabled) {
$this->enabled = true;
} else {
$this->enabled = false;
}
}
/**
* Set level
* @param int $level
* @throws \InvalidArgumentException If invalid log level specified
*/
public function setLevel($level)
{
if (!isset(self::$levels[$level])) {
throw new \InvalidArgumentException('Invalid log level');
}
$this->level = $level;
}
/**
* Get level
* @return int
*/
public function getLevel()
{
return $this->level;
}
/**
* Set writer
* @param mixed $writer
*/
public function setWriter($writer)
{
$this->writer = $writer;
}
/**
* Get writer
* @return mixed
*/
public function getWriter()
{
return $this->writer;
}
/**
* Is logging enabled?
* @return bool
*/
public function isEnabled()
{
return $this->enabled;
}
/**
* Log debug message
* @param mixed $object
* @return mixed|false What the Logger returns, or false if Logger not set or not enabled
*/
public function debug($object)
{
return $this->log($object, self::DEBUG);
}
/**
* Log info message
* @param mixed $object
* @return mixed|false What the Logger returns, or false if Logger not set or not enabled
*/
public function info($object)
{
return $this->log($object, self::INFO);
}
/**
* Log warn message
* @param mixed $object
* @return mixed|false What the Logger returns, or false if Logger not set or not enabled
*/
public function warn($object)
{
return $this->log($object, self::WARN);
}
/**
* Log error message
* @param mixed $object
* @return mixed|false What the Logger returns, or false if Logger not set or not enabled
*/
public function error($object)
{
return $this->log($object, self::ERROR);
}
/**
* Log fatal message
* @param mixed $object
* @return mixed|false What the Logger returns, or false if Logger not set or not enabled
*/
public function fatal($object)
{
return $this->log($object, self::FATAL);
}
/**
* Log message
* @param mixed The object to log
* @param int The message level
* @return int|false
*/
protected function log($object, $level)
{
if ($this->enabled && $this->writer && $level <= $this->level) {
return $this->writer->write($object, $level);
} else {
return false;
}
}
}