public async Task <PendingCommand> Send <TCommand>(TCommand command, CancellationToken ct)
where TCommand : HomeAssistantCommand
{
if (await _state.FirstOrDefaultAsync(state => state == State.Connected) != State.Connected)
{
throw new InvalidOperationException("Connection failed");
}
using (await _sendGate.LockAsync(ct))
using (var id = _commandIdProvider.GetNext())
{
var sender = new PendingCommand(command, this, id, ct);
var payload = JsonSerializer.SerializeToUtf8Bytes(command, JsonWriteOpts);
await _client.SendAsync(new ArraySegment <byte>(payload), WebSocketMessageType.Text, true, ct);
return(sender);
}
}