<?php
/*
* This file is part of the Symfony package.
*
* (c) Fabien Potencier <fabien@symfony.com>
*
* For the full copyright and license information, please view the LICENSE
* file that was distributed with this source code.
*/
namespace Symfony\Component\HttpKernel\Log;
use Psr\Log\AbstractLogger;
use Psr\Log\InvalidArgumentException;
use Psr\Log\LogLevel;
/**
* Minimalist PSR-3 logger designed to write in stderr or any other stream.
*
* @author Kévin Dunglas <dunglas@gmail.com>
*/
class Logger extends AbstractLogger
{
private static $levels = [
LogLevel::DEBUG => 0,
LogLevel::INFO => 1,
LogLevel::NOTICE => 2,
LogLevel::WARNING => 3,
LogLevel::ERROR => 4,
LogLevel::CRITICAL => 5,
LogLevel::ALERT => 6,
LogLevel::EMERGENCY => 7,
];
private $minLevelIndex;
private $formatter;
private $handle;
public function __construct($minLevel = null, $output = null, callable $formatter = null)
{
if (null === $minLevel) {
$minLevel = null === $output || 'php://stdout' === $output || 'php://stderr' === $output ? LogLevel::ERROR : LogLevel::WARNING;
if (isset($_ENV['SHELL_VERBOSITY']) || isset($_SERVER['SHELL_VERBOSITY'])) {
switch ((int) (isset($_ENV['SHELL_VERBOSITY']) ? $_ENV['SHELL_VERBOSITY'] : $_SERVER['SHELL_VERBOSITY'])) {
case -1: $minLevel = LogLevel::ERROR; break;
case 1: $minLevel = LogLevel::NOTICE; break;
case 2: $minLevel = LogLevel::INFO; break;
case 3: $minLevel = LogLevel::DEBUG; break;
}
}
}
if (!isset(self::$levels[$minLevel])) {
throw new InvalidArgumentException(sprintf('The log level "%s" does not exist.', $minLevel));
}
$this->minLevelIndex = self::$levels[$minLevel];
$this->formatter = $formatter ?: [$this, 'format'];
if ($output && false === $this->handle = \is_resource($output) ? $output : @fopen($output, 'a')) {
throw new InvalidArgumentException(sprintf('Unable to open "%s".', $output));
}
}
/**
* {@inheritdoc}
*/
public function log($level, $message, array $context = [])
{
if (!isset(self::$levels[$level])) {
throw new InvalidArgumentException(sprintf('The log level "%s" does not exist.', $level));
}
if (self::$levels[$level] < $this->minLevelIndex) {
return;
}
$formatter = $this->formatter;
if ($this->handle) {
@fwrite($this->handle, $formatter($level, $message, $context));
} else {
error_log($formatter($level, $message, $context, false));
}
}
/**
* @param string $level
* @param string $message
*
* @return string
*/
private function format($level, $message, array $context, $prefixDate = true)
{
if (false !== strpos($message, '{')) {
$replacements = [];
foreach ($context as $key => $val) {
if (null === $val || is_scalar($val) || (\is_object($val) && method_exists($val, '__toString'))) {
$replacements["{{$key}}"] = $val;
} elseif ($val instanceof \DateTimeInterface) {
$replacements["{{$key}}"] = $val->format(\DateTime::RFC3339);
} elseif (\is_object($val)) {
$replacements["{{$key}}"] = '[object '.\get_class($val).']';
} else {
$replacements["{{$key}}"] = '['.\gettype($val).']';
}
}
$message = strtr($message, $replacements);
}
$log = sprintf('[%s] %s', $level, $message).\PHP_EOL;
if ($prefixDate) {
$log = date(\DateTime::RFC3339).' '.$log;
}
return $log;
}
}