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<?php |
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/** |
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* Phossa Project |
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* |
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* PHP version 5.4 |
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* |
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* @category Library |
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* @package Phossa2\Logger |
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* @copyright Copyright (c) 2016 phossa.com |
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* @license http://mit-license.org/ MIT License |
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* @link http://www.phossa.com/ |
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*/ |
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/*# declare(strict_types=1); */ |
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namespace Phossa2\Logger\Processor; |
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use Phossa2\Logger\Entry\LogEntryInterface; |
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/** |
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* InterpolateProcessor |
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* |
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* Replace '{placeholder}' with values from context in the log message. |
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* Should be the last processor in the queue before log handling. |
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* |
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* @package Phossa2\Logger |
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* @author Hong Zhang <[email protected]> |
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* @see ProcessorAbstract |
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* @version 2.0.0 |
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* @since 2.0.0 added |
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*/ |
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class InterpolateProcessor extends ProcessorAbstract |
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{ |
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/** |
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* Replace any '{item}' in the messsage with context['item'] value |
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* |
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* @see http://www.php-fig.org/psr/psr-3/ |
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* |
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* {@inheritDoc} |
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*/ |
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public function __invoke(LogEntryInterface $logEntry) |
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{ |
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$message = $logEntry->getMessage(); |
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$context = $logEntry->getContext(); |
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$replace = []; |
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foreach ($this->getPlaceHolders($message) as $name => $ph) { |
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$replace[$ph] = $this->replaceWith($name, $ph, $context); |
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} |
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$logEntry->setMessage(strtr($message, $replace)); |
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} |
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/** |
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* Get placeholders in array |
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* |
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* @param string $message |
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* @return array |
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* @access protected |
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*/ |
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protected function getPlaceHolders(/*# string */ $message)/*# : array */ |
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{ |
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// not found |
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if (false === strpos($message, '{')) { |
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return []; |
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} |
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$matches = []; |
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$pattern = '~\{([^\}]+)\}~'; |
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if (preg_match_all($pattern, $message, $matches)) { |
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return array_combine($matches[1], $matches[0]); |
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} |
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return []; |
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} |
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/** |
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* Replace with values from the context array |
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* |
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* @param string $name |
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* @param string $placeholder |
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* @param array &$context |
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* @return string |
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* @access protected |
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*/ |
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protected function replaceWith( |
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/*# string */ $name, |
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/*# string */ $placeholder, |
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array &$context |
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)/*# : string */ { |
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// exact match |
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if (isset($context[$name])) { |
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return $this->getString($context[$name]); |
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} |
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// something like user.name |
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$first = explode('.', $name)[0]; |
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if (false !== strpos($name, '.') && isset($context[$first])) { |
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return $this->getSubPart($name, $placeholder, $context[$first]); |
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} |
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// not found |
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return $placeholder; |
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} |
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/** |
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* Get string representation of mixed-typed $data |
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* |
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* @param mixed $data |
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* @return string |
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* @access protected |
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*/ |
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protected function getString($data)/*# : string */ |
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{ |
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if (is_scalar($data)) { |
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return strval($data); |
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} elseif (is_array($data)) { |
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return 'ARRAY[' . count($data) . ']'; |
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} elseif (is_object($data)) { |
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return $this->getObjectString($data); |
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} else { |
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return 'TYPE: ' . gettype($data); |
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} |
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} |
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/** |
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* Get string representation of an object |
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* |
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* @param object $object |
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* @return string |
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* @access protected |
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*/ |
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protected function getObjectString($object)/*# : string */ |
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{ |
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// exception found |
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if ($object instanceof \Exception) { |
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return 'EXCEPTION: ' . $object->getMessage(); |
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// toString() found |
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} elseif (method_exists($object, '__toString')) { |
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return (string) $object; |
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// other type object |
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} else { |
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return 'OBJECT: ' . get_class($object); |
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} |
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} |
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/** |
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* Get 'user.name' type of result, only support 2 level |
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* |
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* @param string $name |
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* @param string $placeholder used only if nothing matched |
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* @param mixed $data |
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* @return string |
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* @access protected |
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*/ |
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protected function getSubPart( |
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/*# string */ $name, |
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/*# string */ $placeholder, |
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$data |
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)/*# : string */ { |
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list(, $second) = explode('.', $name, 2); |
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$arr = (array) $data; |
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if (isset($arr[$second])) { |
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return $arr[$second]; |
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} |
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return $placeholder; |
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} |
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} |
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phossa2 /
logger
