decode static method

RealtimeFrame? decode(Object? message)

Null when message is not a frame this client can read. A malformed message is dropped rather than thrown: one bad payload from a server or a proxy is not a reason to tear down every channel on the socket.

Implementation

static RealtimeFrame? decode(Object? message) {
  if (message is! String) return null;
  final Object? envelope;
  try {
    envelope = jsonDecode(message);
  } on FormatException {
    return null;
  }
  if (envelope is! Map) return null;
  final event = envelope['event'];
  if (event is! String) return null;
  final channel = envelope['channel'];
  return RealtimeFrame(
    event,
    _inner(envelope['data']),
    channel: channel is String ? channel : null,
  );
}