MediaType change()

in lib/src/media_type.dart [93:127]

• 30 lines of code
• 6 McCabe index (conditional complexity)

  MediaType change(
      {String? type,
      String? subtype,
      String? mimeType,
      Map<String, String>? parameters,
      bool clearParameters = false}) {
    if (mimeType != null) {
      if (type != null) {
        throw ArgumentError('You may not pass both [type] and [mimeType].');
      } else if (subtype != null) {
        throw ArgumentError('You may not pass both [subtype] and '
            '[mimeType].');
      }

      final segments = mimeType.split('/');
      if (segments.length != 2) {
        throw FormatException('Invalid mime type "$mimeType".');
      }

      type = segments[0];
      subtype = segments[1];
    }

    type ??= this.type;
    subtype ??= this.subtype;
    parameters ??= {};

    if (!clearParameters) {
      final newParameters = parameters;
      parameters = Map.from(this.parameters);
      parameters.addAll(newParameters);
    }

    return MediaType(type, subtype, parameters);
  }