/// <summary>
/// Retrieves access points and interfaces from the device and updates the view.
/// </summary>
private async Task DownloadAccessPointsAsync()
{
BusyStateManager.EnterBusy();
BusyStateManager.SetMessage(SeverityType.Info, "Retrieving access points and interfaces.");
/* Temporary store selected interface and access point so they can be restored after download. */
Guid? interfaceId = SelectedInterface?.Id;
string profileName = SelectedAccessPoint?.ProfileName;
string ssid = SelectedAccessPoint?.Ssid;
/* Scan and download access points and interfaces. */
await _mainController.ScanNetworkAsync(TimeSpan.FromSeconds(_configurationProvider.Timeout),
CancellationToken.None);
IEnumerable <AccessPoint> accessPoints = await _mainController.GetWiFiAccessPointsAsync();
IEnumerable <Interface> interfaces = await _mainController.GetWiFiInterfacesAsync();
if (accessPoints == default(IEnumerable <AccessPoint>) || interfaces == default(IEnumerable <Interface>))
{
AccessPoints = new ObservableCollection <AccessPoint>(Enumerable.Empty <AccessPoint>());
WiFiAccessPointViewSource.Source = AccessPoints;
Interfaces = new ObservableCollection <Interface>(Enumerable.Empty <Interface>());
}
else
{
/* User specified threshold is used to filter access points that meet this threshold. */
AccessPoints = new ObservableCollection <AccessPoint>(accessPoints
.Where(x => x.LinkQuality > _configurationProvider.Threshold));
WiFiAccessPointViewSource.Source = AccessPoints;
Interfaces = new ObservableCollection <Interface>(interfaces);
}
/* Restore selected interface and access point. */
Interface selectedInterface = Interfaces.Where(x => x.Id == interfaceId).FirstOrDefault();
AccessPoint selectedAccessPoint = default(AccessPoint);
if (!string.IsNullOrEmpty(profileName))
{
selectedAccessPoint = AccessPoints.Where(x => x.Id == interfaceId &&
x.ProfileName == profileName).FirstOrDefault();
}
else if (!string.IsNullOrEmpty(ssid))
{
selectedAccessPoint = AccessPoints.Where(x => x.Id == interfaceId &&
x.Ssid.Equals(ssid, StringComparison.Ordinal)).FirstOrDefault();
}
SelectedInterface = selectedInterface == default(Interface) ?
Interfaces.FirstOrDefault() : selectedInterface;
if (selectedAccessPoint != default(AccessPoint))
{
SelectedAccessPoint = selectedAccessPoint;
}
BusyStateManager.SetMessage(SeverityType.None);
BusyStateManager.ExitBusy();
}
public void Update()
{
AccessPoints = AccessPoints.Where(
ap => (ap.LastTime != null) && ((DateTime.Now - ap.LastTime) < TimeSpan.FromSeconds(MAX_AP_INVISIBLE_TIME_SEC))).ToList();
}