public AddEditSpotPage(ISpotsDataService data, FavouriteSpot spot, MediaFile image)
{
this.image = image;
this.spot = spot;
this.data = data;
BindingContext = spot;
InitializeComponent();
mainLayout.Children.Insert(0, new FavSpotView());
SaveImageToAzureBlobStorageAsync();
}
public async Task <bool> SaveFavoriteSpotAsync(FavouriteSpot spot)
{
Initialize();
if (string.IsNullOrEmpty(spot.Id))
{
await favouriteSpotsTable.InsertAsync(spot);
}
else
{
await favouriteSpotsTable.UpdateAsync(spot);
}
return(true);
}
async Task SelectImage(bool selectImageFromCamera)
{
MediaFile image;
if (selectImageFromCamera)
{
image = await CrossMedia.Current.TakePhotoAsync(new StoreCameraMediaOptions()
{
AllowCropping = true,
DefaultCamera = CameraDevice.Rear,
CompressionQuality = 60,
});
}
else
{
image = await CrossMedia.Current.PickPhotoAsync(new PickMediaOptions()
{
CompressionQuality = 60
});
}
if (image == null)
{
return;
}
var dlg = DependencyService.Get <IShowInProgressDialog>();
dlg.Show("Processing the image...");
var spot = new FavouriteSpot()
{
Name = "Spot",
RatingOutOfFive = 5,
AddedById = App.AuthenticatedUser != null ? App.AuthenticatedUser.UserId : "",
};
var processingTask = GetCurrentDevicePositionAsync().ContinueWith((locationTask) =>
{
var location = locationTask.Result;
spot.Latitude = location.Latitude;
spot.Longitude = location.Longitude;
new Geocoder()
.GetAddressesForPositionAsync(new Position(location.Latitude, location.Longitude))
.ContinueWith((possibleAddressMatches) =>
{
if (possibleAddressMatches.Result.Count() > 0)
{
spot.Address = possibleAddressMatches.Result.First();
}
});
});
// Get the description of the image using Azure Cognative Services
var visionClient = new Microsoft.ProjectOxford.Vision.VisionServiceClient(MobileServiceClientConstants.CognativeServicesVisionApiKey);
var processImage = visionClient.DescribeAsync(image.GetStream()).ContinueWith((imageDescriptionTask) =>
{
// Process the Cognative Services Result
var suggestedCategories = String.Join(", ", imageDescriptionTask.Result.Description.Tags);
if (String.IsNullOrEmpty(spot.Category))
{
spot.Category = suggestedCategories;
}
var suggestedDescription = imageDescriptionTask.Result.Description.Captions.First();
if (suggestedDescription != null && String.IsNullOrEmpty(spot.Description))
{
spot.Description = suggestedDescription.Text;
}
});
// Wait for the operations to finish
await Task.WhenAll(processingTask, processImage);
dlg.Hide();
// Show the edit page to let them save the record or not
var editPage = new AddEditSpotPage(Data, spot, image);
await Navigation.PushAsync(editPage);
}
public async Task <bool> SaveFavoriteSpotAsync(FavouriteSpot spot)
{
FixedSpots.Add(spot);
return(await Task.FromResult(true));
}
