async Task <IActionResult> CheckUserCanJoinSessionAsync(SessionModel session, string nickname, string userId, string rejoinCode, CancellationToken cancellationToken)
{
if (await _sessionProvider.DoesUserExistInSessionAsync(session.SessionId, nickname, cancellationToken))
{
if (userId != null && !ValidationHelper.ValidateObjectId(userId))
{
return(BadRequest());
}
var user = string.IsNullOrEmpty(userId) ? null : await _sessionProvider.GetUserByIdAsync(userId, cancellationToken);
if (user is null || user.RejoinCode != rejoinCode)
{
return(Conflict());
}
}
return(Ok());
}
