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<?php |
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namespace Generics\Logger; |
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use Generics\Streams\MemoryStream; |
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use Psr\Log\AbstractLogger; |
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use Psr\Log\LogLevel; |
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abstract class BasicLogger extends AbstractLogger |
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{ |
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/** |
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* The level threshold where to log |
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* |
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* @var string |
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*/ |
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private $level; |
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/** |
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* Set the log level threshold |
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* |
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* @param string $level |
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* @return BasicLogger |
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*/ |
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public function setLevel(string $level):BasicLogger |
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{ |
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$this->level = $level; |
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return $this; |
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} |
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/** |
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* Checks the given level |
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* |
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* @param string $level |
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* @throws \Psr\Log\InvalidArgumentException |
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*/ |
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private static function checkLevel($level) |
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{ |
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if ($level != LogLevel::ALERT && $level != LogLevel::CRITICAL && $level != LogLevel::DEBUG && // |
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$level != LogLevel::EMERGENCY && $level != LogLevel::ERROR && $level != LogLevel::INFO && // |
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$level != LogLevel::NOTICE && $level != LogLevel::WARNING) { |
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throw new \Psr\Log\InvalidArgumentException("Invalid log level provided!"); |
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} |
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} |
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/** |
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* Format the message to log and return a memory stream of it |
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* |
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* @param integer $level |
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* The arbitrary level |
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* @param string $message |
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* The message to log |
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* @param array $context |
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* The context of logging |
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* |
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* @return \Generics\Streams\MemoryStream The formatted message |
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*/ |
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protected function getMessage($level, $message, array $context = array()) : MemoryStream |
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{ |
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/** |
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* This check implements the specification request. |
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*/ |
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self::checkLevel($level); |
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$ms = new MemoryStream(); |
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$ms->write(strftime("%Y-%m-%d %H:%M:%S", time())); |
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$ms->interpolate("\t[{level}]: ", array('level' => sprintf("%6.6s", $level))); |
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$ms->interpolate($message, $context); |
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$ms->write("\n"); |
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return $ms; |
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} |
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/** |
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* Must be implemented by concrete logger |
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* |
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* @param integer $level |
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* The arbitrary level |
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* @param string $message |
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* The message to log |
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* @param array $context |
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* The context of logging |
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*/ |
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abstract protected function logImpl($level, $message, array $context = array()); |
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/** |
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* {@inheritDoc} |
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* @see \Psr\Log\LoggerInterface::log() |
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*/ |
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public function log($level, $message, array $context = array()) |
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{ |
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if( $this->levelHasReached($level) ) { |
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$this->logImpl($level, $message, $context); |
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} |
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} |
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protected function levelHasReached($level):bool |
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{ |
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$result = true; |
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$orderedLevels = array( |
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LogLevel::EMERGENCY => 0, |
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LogLevel::ALERT => 1, |
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LogLevel::CRITICAL => 2, |
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LogLevel::ERROR => 3, |
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LogLevel::WARNING => 4, |
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LogLevel::NOTICE => 5, |
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LogLevel::INFO => 6, |
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LogLevel::DEBUG => 7 |
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); |
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if ( $this->level ) { |
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$threshold = $orderedLevels[$this->level]; |
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$reached = $orderedLevels[$level]; |
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$result = $reached <= $threshold; |
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} |
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return $result; |
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} |
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} |
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