private async Task onAddManually()
{
try
{
if (user.OriginUser == null)
{
MessagingCenter.Send(this, "emptyOrigin");
}
else
{
var businesscardEntryPage = new BusinesscardEntryPage();
await Navigation.PushAsync(businesscardEntryPage);
}
}
catch (Exception)
{
Debug.WriteLine("BusinessCardsViewModel - Failed to add card");
}
}
// Method which analyses the photo using the ocr service and then redirecting to the entrypage
public async Task SendToOCR(string path, int id)
{
try
{
network = Connectivity.NetworkAccess;
if (network == NetworkAccess.Internet)
{
// Send a message to the view to start the loading indicator and to disable the buttons
MessagingCenter.Send(this, "Sending");
DependencyService.Get <IToast>().LongAlert("Analyzing businesscard.\nThis may take a while.");
//Reset the OCR Service
ocrService.resetOCR();
// Define a new card before trying to analyze the image
Businesscard card;
// We want the analyzing to stop if it doesn't complete within a certain timeframe
int timeout = 20000;
Task <Businesscard> getCardTask = ocrService.getCard(path);
using (var timeoutCancellationTokenSource = new CancellationTokenSource())
{
// Check which task finishes first: the delay or the scanning
if (await Task.WhenAny(getCardTask, Task.Delay(timeout, timeoutCancellationTokenSource.Token)) == getCardTask)
{
// Task completed within timeout.
// Consider that the task may have faulted or been canceled.
// We re-await the task so that any exceptions/cancellation is rethrown.
card = await getCardTask;
}
else
{
// Task didn't complete within timeout.
// Throw timeexception to show relevant toast
throw new TimeoutException("OCR took to long.");
}
}
// Save the base64 version of the image in the object to later send to the endpoint
card.Base64 = imageService.ConvertImageToBase64(path);
card.Id = id;
var businesscardEntryPage = new BusinesscardEntryPage(card);
await Navigation.PushAsync(businesscardEntryPage);
MessagingCenter.Send(this, "Done");
}
else
{
Debug.WriteLine("Won't try to scan this image since there is no internet connection");
DependencyService.Get <IToast>().LongAlert("Can't scan the businesscard.\nThere is no internet connection.");
}
}
catch (BadRequestException ex)
{
Debug.WriteLine("BADREQUESTEXCEPTION for OCR: " + ex.ToString());
// Functionality to display a pop up - sending a message to the view that a bad request was sent
MessagingCenter.Send(this, "BadRequest");
MessagingCenter.Send(this, "Done");
}
catch (FormRecognizerException ex)
{
Debug.WriteLine("FORMRECOGNIZEREXCEPTION for OCR: " + ex.ToString());
// Functionality to display a pop up - sending a message to the view that a bad request was sent
MessagingCenter.Send(this, "GeneralError");
MessagingCenter.Send(this, "Done");
}
catch (TimeoutException ex)
{
Debug.WriteLine("TIMEOUTEXCEPTION for OCR: " + ex.ToString());
MessagingCenter.Send(this, "TimeoutException");
MessagingCenter.Send(this, "Done");
}
catch (Exception ex)
{
Debug.WriteLine("GENERALEXCEPTION for OCR: " + ex.ToString());
// Functionality to display a pop up - sending a message to the view that a bad request was sent
MessagingCenter.Send(this, "GeneralError");
MessagingCenter.Send(this, "Done");
}
}
