encode method

String encode(Log log)

Encodes log as a single JSON line (no trailing newline).

Implementation

String encode(Log log) {
  final levelTheme = theme[log.level];

  // `data` is the sanitizer's scope, so a rule may drop the whole root.
  // The drop is signalled out of band — an empty rendering is legal on
  // its own — and it removes the key entirely, the same way the console
  // printer removes the data block instead of printing a bare colon.
  Object? data;
  var hasData = log.hasData;
  if (hasData) {
    switch (dataFormat) {
      case FileLogDataFormat.text:
        final rendered = Loggable.renderRoot(
          log.data,
          theme: levelTheme,
          config: config,
        );
        data = rendered.text;
        hasData = !rendered.dropped;
      case FileLogDataFormat.json:
        final rendered = Loggable.renderRootJson(
          log.data,
          config: jsonConfig,
        );
        data = rendered.json;
        hasData = !rendered.dropped;
    }
  }

  return jsonEncode(<String, Object?>{
    'num': log.num,
    'level': log.level,
    'levelName': log.levelName,
    'time': log.time.toUtc().toIso8601String(),
    if (log.path.isNotEmpty) 'path': log.path,
    if (log.traceIds.isNotEmpty)
      'traceIds': [for (final id in log.traceIds) id.toString()],
    'message': levelTheme.formatMessage(
      levelTheme.formatValue(
        log.message,
        escapeAnsiCodes: LoggableConfig.appEscapeAnsiCodes,
      ),
      escapeAnsiCodes: false,
    ),
    if (log.tags.isNotEmpty) 'tags': [...log.tags],
    if (hasData) 'data': data,
    // The error and the stack trace are outside the sanitizer's
    // documented scope (values inside `data` only): both are rendered
    // with the root offer suppressed, so a `depth == 0` rule cannot
    // erase or rewrite them.
    if (log.error case final error?)
      'error': Loggable.renderOutsideSanitizerScope(error.toString),
    if (log.stackTrace case final stackTrace?)
      'stackTrace': Loggable.renderOutsideSanitizerScope(
        stackTrace.toString,
      ),
  });
}