private async void Timer_Tick(object sender, object e)
{
if (livetemperature() >= 23)
{
TestPostMessage(livetemperature().ToString());
//Take photo and save into Intrusos
if (webcam == null || !webcam.IsInitialized())
{
// Initialize Webcam Helper
webcam = new WebcamHelper();
await webcam.InitializeCameraAsync();
}
currentIdPhotoFile = await webcam.CapturePhoto();
// Create or open the folder in which the Whitelist is stored
StorageFolder whitelistFolder = await KnownFolders.PicturesLibrary.CreateFolderAsync(GeneralConstants.WhiteListFolderName, CreationCollisionOption.OpenIfExists);
// Create a folder to store this specific user's photos
StorageFolder currentFolder = await whitelistFolder.CreateFolderAsync("Intrusos", CreationCollisionOption.OpenIfExists);
// Move the already captured photo the user's folder
await currentIdPhotoFile.MoveAsync(currentFolder);
}
await Task.Run(async() => { await AzureIoTHub.SendTemperatureAsync(livetemperature()); });
}
/// <summary>
/// Triggered when webcam feed loads both for the first time and every time page is navigated to.
/// If no WebcamHelper has been created, it creates one. Otherwise, simply restarts webcam preview feed on page.
/// </summary>
private async void WebcamFeed_Loaded(object sender, RoutedEventArgs e)
{
if (webcam == null || !webcam.IsInitialized())
{
// Initialize Webcam Helper
webcam = new WebcamHelper();
await webcam.InitializeCameraAsync();
// Set source of WebcamFeed on MainPage.xaml
WebcamFeed.Source = webcam.mediaCapture;
// Check to make sure MediaCapture isn't null before attempting to start preview. Will be null if no camera is attached.
if (WebcamFeed.Source != null)
{
// Start the live feed
await webcam.StartCameraPreview();
}
}
else if (webcam.IsInitialized())
{
WebcamFeed.Source = webcam.mediaCapture;
// Check to make sure MediaCapture isn't null before attempting to start preview. Will be null if no camera is attached.
if (WebcamFeed.Source != null)
{
await webcam.StartCameraPreview();
}
}
}
public async Task CapturePhoto()
{
await webcam.InitializeCameraAsync();
if (!webcam.IsInitialized())
{
Debug.WriteLine("Not initialied");
}
StorageFile image = await webcam.CapturePhoto();
try
{
// Oxford determines whether or not the visitor is on the Whitelist and returns true if so
recognizedVisitors = await OxfordFaceAPIHelper.IsFaceInWhitelist(image);
}
catch (FaceRecognitionException fe)
{
switch (fe.ExceptionType)
{
// Fails and catches as a FaceRecognitionException if no face is detected in the image
case FaceRecognitionExceptionType.NoFaceDetected:
Debug.WriteLine("WARNING: No face detected in this image.");
break;
}
}
catch (FaceAPIException faceAPIEx)
{
Debug.WriteLine("FaceAPIException in IsFaceInWhitelist(): " + faceAPIEx.ErrorMessage);
}
catch
{
// General error. This can happen if there are no visitors authorized in the whitelist
Debug.WriteLine("WARNING: Oxford just threw a general expception.");
}
if (recognizedVisitors.Count > 0)
{
// If everything went well and a visitor was recognized, unlock the door:
Ledpin.Write(GpioPinValue.Low);
}
else
{
// Create or open the folder in which the Whitelist is stored
StorageFolder folder = await KnownFolders.PicturesLibrary.CreateFolderAsync("Banned", CreationCollisionOption.OpenIfExists);
// Move the already captured photo the user's folder
await image.MoveAsync(folder);
var model = new Models.Database.Ban()
{
Image = image.Name,
Time = DateTime.Now
};
Ledpin.Write(GpioPinValue.High);
database.InsertModel <Models.Database.Ban>(model);
}
isCapturing = false;
}