Chris@14: <?php
Chris@14: 
Chris@14: /*
Chris@14:  * This file is part of the Symfony package.
Chris@14:  *
Chris@14:  * (c) Fabien Potencier <fabien@symfony.com>
Chris@14:  *
Chris@14:  * For the full copyright and license information, please view the LICENSE
Chris@14:  * file that was distributed with this source code.
Chris@14:  */
Chris@14: 
Chris@14: namespace Symfony\Component\HttpKernel\Log;
Chris@14: 
Chris@14: use Psr\Log\AbstractLogger;
Chris@14: use Psr\Log\InvalidArgumentException;
Chris@14: use Psr\Log\LogLevel;
Chris@14: 
Chris@14: /**
Chris@14:  * Minimalist PSR-3 logger designed to write in stderr or any other stream.
Chris@14:  *
Chris@14:  * @author Kévin Dunglas <dunglas@gmail.com>
Chris@14:  */
Chris@14: class Logger extends AbstractLogger
Chris@14: {
Chris@17:     private static $levels = [
Chris@14:         LogLevel::DEBUG => 0,
Chris@14:         LogLevel::INFO => 1,
Chris@14:         LogLevel::NOTICE => 2,
Chris@14:         LogLevel::WARNING => 3,
Chris@14:         LogLevel::ERROR => 4,
Chris@14:         LogLevel::CRITICAL => 5,
Chris@14:         LogLevel::ALERT => 6,
Chris@14:         LogLevel::EMERGENCY => 7,
Chris@17:     ];
Chris@14: 
Chris@14:     private $minLevelIndex;
Chris@14:     private $formatter;
Chris@14:     private $handle;
Chris@14: 
Chris@14:     public function __construct($minLevel = null, $output = 'php://stderr', callable $formatter = null)
Chris@14:     {
Chris@14:         if (null === $minLevel) {
Chris@18:             $minLevel = 'php://stdout' === $output || 'php://stderr' === $output ? LogLevel::CRITICAL : LogLevel::WARNING;
Chris@14: 
Chris@14:             if (isset($_ENV['SHELL_VERBOSITY']) || isset($_SERVER['SHELL_VERBOSITY'])) {
Chris@14:                 switch ((int) (isset($_ENV['SHELL_VERBOSITY']) ? $_ENV['SHELL_VERBOSITY'] : $_SERVER['SHELL_VERBOSITY'])) {
Chris@14:                     case -1: $minLevel = LogLevel::ERROR; break;
Chris@14:                     case 1: $minLevel = LogLevel::NOTICE; break;
Chris@14:                     case 2: $minLevel = LogLevel::INFO; break;
Chris@14:                     case 3: $minLevel = LogLevel::DEBUG; break;
Chris@14:                 }
Chris@14:             }
Chris@14:         }
Chris@14: 
Chris@14:         if (!isset(self::$levels[$minLevel])) {
Chris@14:             throw new InvalidArgumentException(sprintf('The log level "%s" does not exist.', $minLevel));
Chris@14:         }
Chris@14: 
Chris@14:         $this->minLevelIndex = self::$levels[$minLevel];
Chris@17:         $this->formatter = $formatter ?: [$this, 'format'];
Chris@17:         if (false === $this->handle = \is_resource($output) ? $output : @fopen($output, 'a')) {
Chris@14:             throw new InvalidArgumentException(sprintf('Unable to open "%s".', $output));
Chris@14:         }
Chris@14:     }
Chris@14: 
Chris@14:     /**
Chris@14:      * {@inheritdoc}
Chris@14:      */
Chris@17:     public function log($level, $message, array $context = [])
Chris@14:     {
Chris@14:         if (!isset(self::$levels[$level])) {
Chris@14:             throw new InvalidArgumentException(sprintf('The log level "%s" does not exist.', $level));
Chris@14:         }
Chris@14: 
Chris@14:         if (self::$levels[$level] < $this->minLevelIndex) {
Chris@14:             return;
Chris@14:         }
Chris@14: 
Chris@14:         $formatter = $this->formatter;
Chris@14:         fwrite($this->handle, $formatter($level, $message, $context));
Chris@14:     }
Chris@14: 
Chris@14:     /**
Chris@14:      * @param string $level
Chris@14:      * @param string $message
Chris@14:      * @param array  $context
Chris@14:      *
Chris@14:      * @return string
Chris@14:      */
Chris@14:     private function format($level, $message, array $context)
Chris@14:     {
Chris@14:         if (false !== strpos($message, '{')) {
Chris@17:             $replacements = [];
Chris@14:             foreach ($context as $key => $val) {
Chris@14:                 if (null === $val || is_scalar($val) || (\is_object($val) && method_exists($val, '__toString'))) {
Chris@14:                     $replacements["{{$key}}"] = $val;
Chris@14:                 } elseif ($val instanceof \DateTimeInterface) {
Chris@14:                     $replacements["{{$key}}"] = $val->format(\DateTime::RFC3339);
Chris@14:                 } elseif (\is_object($val)) {
Chris@14:                     $replacements["{{$key}}"] = '[object '.\get_class($val).']';
Chris@14:                 } else {
Chris@14:                     $replacements["{{$key}}"] = '['.\gettype($val).']';
Chris@14:                 }
Chris@14:             }
Chris@14: 
Chris@14:             $message = strtr($message, $replacements);
Chris@14:         }
Chris@14: 
Chris@14:         return sprintf('%s [%s] %s', date(\DateTime::RFC3339), $level, $message).\PHP_EOL;
Chris@14:     }
Chris@14: }