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| <?php | |
| namespace Wikimedia\Parsoid\Logger; | |
| use Psr\Log\LoggerInterface; | |
| use Psr\Log\LogLevel; | |
| use Wikimedia\Parsoid\Utils\PHPUtils; | |
| class ParsoidLogger { | |
| /* @var Logger */ | |
| private $backendLogger; | |
| /* @var string */ | |
| private $enabledRE; | |
| /** PORT-FIXME: Not yet implemented. Monolog supports sampling as well! */ | |
| /* @var string */ | |
| private $samplingRE; | |
| private const PRETTY_LOGTYPE_MAP = [ | |
| 'debug' => '[DEBUG]', | |
| 'trace/peg' => '[peg]', | |
| 'trace/pre' => '[PRE]', | |
| 'debug/pre' => '[PRE-DBG]', | |
| 'trace/p-wrap' => '[P]', | |
| 'trace/html' => '[HTML]', | |
| 'debug/html' => '[HTML-DBG]', | |
| 'trace/sanitizer' => '[SANITY]', | |
| 'trace/tsp' => '[TSP]', | |
| 'trace/dsr' => '[DSR]', | |
| 'trace/list' => '[LIST]', | |
| 'trace/quote' => '[QUOTE]', | |
| 'trace/wts' => '[WTS]', | |
| 'debug/wts/sep' => '[SEP]', | |
| 'trace/selser' => '[SELSER]', | |
| 'trace/domdiff' => '[DOM-DIFF]', | |
| 'trace/wt-escape' => '[wt-esc]', | |
| 'trace/ttm:1' => '[1-TTM]', | |
| 'trace/ttm:2' => '[2-TTM]', | |
| 'trace/ttm:3' => '[3-TTM]', | |
| ]; | |
| /** | |
| * TRACE / DEBUG: Make trace / debug regexp with appropriate postfixes, | |
| * depending on the command-line options passed in. | |
| * | |
| * @param array $flags | |
| * @param string $logType | |
| * @return string | |
| */ | |
| private function buildLoggingRE( array $flags, string $logType ): string { | |
| return $logType . '/(' . implode( '|', array_keys( $flags ) ) . ')(/|$)'; | |
| } | |
| /** | |
| * @param LoggerInterface $backendLogger | |
| * @param array $options | |
| * - logLevels string[] | |
| * - traceFlags <string,bool>[] | |
| * - debugFlags <string,bool>[] | |
| * - dumpFlags <string,bool>[] | |
| */ | |
| public function __construct( LoggerInterface $backendLogger, array $options ) { | |
| $this->backendLogger = $backendLogger; | |
| $this->enabledRE = ''; | |
| $rePatterns = $options['logLevels']; | |
| if ( $options['traceFlags'] ) { | |
| $rePatterns[] = $this->buildLoggingRE( $options['traceFlags'], 'trace' ); | |
| } | |
| if ( $options['debugFlags'] ) { | |
| $rePatterns[] = $this->buildLoggingRE( $options['debugFlags'], 'debug' ); | |
| } | |
| if ( $options['dumpFlags'] ) { | |
| $rePatterns[] = $this->buildLoggingRE( $options['dumpFlags'], 'dump' ); | |
| } | |
| if ( count( $rePatterns ) > 0 ) { | |
| $this->enabledRE = '#(' . implode( '|', $rePatterns ) . ')#'; | |
| } else { | |
| $this->enabledRE = '/[^\s\S]/'; | |
| } | |
| } | |
| /** | |
| * PORT-FIXME: This can become a MonologFormatter possibly. | |
| * | |
| * We can create channel-specific loggers and this formatter | |
| * can be added to the trace-channel logger. | |
| * | |
| * @param string $logType | |
| * @param array $args | |
| * @return string | |
| */ | |
| private function formatTrace( string $logType, array $args ): string { | |
| $typeColumnWidth = 15; | |
| $firstArg = $args[0]; | |
| // Assume first numeric arg is always the pipeline id | |
| if ( is_numeric( $firstArg ) ) { | |
| $msg = $firstArg . '-'; | |
| array_shift( $args ); | |
| } else { | |
| $msg = ''; | |
| } | |
| // indent by number of slashes | |
| $numMatches = preg_match_all( '#/#', $logType ); | |
| $indent = str_repeat( ' ', $numMatches > 1 ? $numMatches - 1 : 0 ); | |
| $msg .= $indent; | |
| $prettyLogType = self::PRETTY_LOGTYPE_MAP[$logType] ?? null; | |
| if ( $prettyLogType ) { | |
| $msg .= $prettyLogType; | |
| } else { | |
| // XXX: could shorten or strip trace/ logType prefix in a pure trace logger | |
| $msg .= $logType; | |
| // More space for these log types | |
| $typeColumnWidth = 30; | |
| } | |
| // Fixed-width type column so that the messages align | |
| $msg = substr( $msg, 0, $typeColumnWidth ); | |
| $msg .= str_repeat( ' ', $typeColumnWidth - strlen( $msg ) ); | |
| $msg .= '|' . $indent . $this->logMessage( null, $args ); | |
| return $msg; | |
| } | |
| /** | |
| * @param ?string $logType | |
| * @param array $args | |
| * @return string | |
| */ | |
| private function logMessage( ?string $logType, array $args ): string { | |
| $numArgs = count( $args ); | |
| $output = $logType ? "[$logType]" : ''; | |
| foreach ( $args as $arg ) { | |
| // don't use is_callable, it would return true for any string that happens to be a function name | |
| if ( $arg instanceof \Closure ) { | |
| $output .= ' ' . $arg(); | |
| } elseif ( is_string( $arg ) ) { | |
| if ( strlen( $arg ) ) { | |
| $output .= ' ' . $arg; | |
| } | |
| } else { | |
| $output .= PHPUtils::jsonEncode( $arg ); | |
| } | |
| } | |
| return $output; | |
| } | |
| /** | |
| * @param string $prefix | |
| * @param mixed ...$args | |
| */ | |
| public function log( string $prefix, ...$args ): void { | |
| // FIXME: This requires enabled loglevels to percolate all the way here!! | |
| // Quick check for un-enabled logging. | |
| if ( !preg_match( $this->enabledRE, $prefix ) ) { | |
| return; | |
| } | |
| // PORT-FIXME: Are there any instances where we will have this? | |
| if ( $this->backendLogger instanceof \Psr\Log\NullLogger ) { | |
| // No need to build the string if it's going to be thrown away anyway. | |
| return; | |
| } | |
| $logLevel = preg_replace( '#/.*$#', '', $prefix ); | |
| // Handle trace type first | |
| if ( $logLevel === 'trace' || $logLevel === 'debug' ) { | |
| $this->backendLogger->log( LogLevel::DEBUG, $this->formatTrace( $prefix, $args ) ); | |
| } else { | |
| if ( $logLevel === 'dump' ) { | |
| $logLevel = LogLevel::DEBUG; | |
| } elseif ( $logLevel === 'fatal' ) { | |
| $logLevel = LogLevel::CRITICAL; | |
| } elseif ( $logLevel === 'warn' ) { | |
| $logLevel = LogLevel::WARNING; | |
| } | |
| $this->backendLogger->log( $logLevel, $this->logMessage( $prefix, $args ) ); | |
| } | |
| } | |
| } |