/// SignalR text framing (record separator 0x1E).
class TextMessageFormat {
  static const int recordSeparatorCode = 0x1e;
  static final String recordSeparator = String.fromCharCode(recordSeparatorCode);

  static String write(String output) => '$output$recordSeparator';

  static List<String> parse(String input) {
    if (input.isEmpty || input.codeUnitAt(input.length - 1) != recordSeparatorCode) {
      throw StateError('Message is incomplete.');
    }
    final List<String> messages = input.split(recordSeparator);
    messages.removeLast();
    return messages;
  }
}