byType<T> method

T? byType<T>({ T onTextRequest(NearbyMessageTextRequest)?, T onTextResponse(NearbyMessageTextResponse)?, T onFilesRequest(NearbyMessageFilesRequest)?, T onFilesResponse(NearbyMessageFilesResponse)?, })

• The onTextRequest callback returns this instance of NearbyMessageContent, cast as NearbyMessageTextRequest if is a text.

• The onFilesRequest callback returns this instance of NearbyMessageContent, cast as NearbyMessageFilesRequest if is a files pack request.

• The onFilesResponse callback returns this instance of NearbyMessageContent, cast as NearbyMessageFilesResponse if is a files pack response.

Implementation

T? byType<T>({
  T Function(NearbyMessageTextRequest)? onTextRequest,
  T Function(NearbyMessageTextResponse)? onTextResponse,
  T Function(NearbyMessageFilesRequest)? onFilesRequest,
  T Function(NearbyMessageFilesResponse)? onFilesResponse,
}) {
  if (this is NearbyMessageTextRequest && onTextRequest != null) {
    return onTextRequest(this as NearbyMessageTextRequest);
  } else if (this is NearbyMessageTextResponse && onTextResponse != null) {
    return onTextResponse(this as NearbyMessageTextResponse);
  } else if (this is NearbyMessageFilesRequest && onFilesRequest != null) {
    return onFilesRequest(this as NearbyMessageFilesRequest);
  } else if (this is NearbyMessageFilesResponse && onFilesResponse != null) {
    return onFilesResponse(this as NearbyMessageFilesResponse);
  }
  return null;
}