public override Task OnDisconnected(bool stopCalled)
{
CurrentlyUsedWebPage userTrace = _repo.GetAllWebPages().SingleOrDefault(x => x.ConnectionId == new Guid(Context.ConnectionId));
// try to delete if user has not reconnected
Task mytask = Task.Run(() =>
{
UserDisconnected(userTrace, _repo, Context.ConnectionId);
});
return(base.OnDisconnected(stopCalled));
}
private async void UserDisconnected(CurrentlyUsedWebPage userTrace, CurrentlyUsedWebPageRepository repo, string connectionId)
{
// copy userTrace to local var, this gets disposed by CLR after some time.
var localUserTrace = userTrace;
await Task.Delay(_userTimeToLive);
// make sure localtrace isn't null
if (localUserTrace == null)
{
return;
}
// check db if a connection still exist
bool hasUserReconnected = repo.GetAllWebPages().Any(x => x.User == localUserTrace.User &&
x.Url == localUserTrace.Url && x.ConnectionId != new Guid(connectionId));
// delete if disconnected
if (!hasUserReconnected)
{
repo.DeletePage(connectionId);
Update(userTrace, 4);
}
}
