/// <summary>
/// Called when a photo has been uploaded successfully.
/// </summary>
/// <param name="category">The associated category.</param>
public Task OnUploadFinished(Category category)
{
_navigationFacade.NavigateToPhotoStream(category);
// Remove the frames related to uploading the photo for back button navigation
_navigationFacade.RemoveUploadPhotoFramesFromBackStack(category.Id);
return Task.CompletedTask;
}
/// <summary>
/// Creates a new instance.
/// </summary>
/// <param name="photoService">The photo service.</param>
/// <param name="dialogService">The dialog service.</param>
public CreateCategoryViewModel(IPhotoService photoService, IDialogService dialogService)
{
_photoService = photoService;
_dialogService = dialogService;
_categoryMatchFinder = new CategoryMatchFinder();
// Initialize lists
_categories = new List<Category>();
// We use the Category data model as it
// handles input validation.
Category = new Category();
// We need to be always up-to-date regarding input validation,
// lets register for model changes
Category.PropertyChanged += Category_PropertyChanged;
}
/// <summary>
/// Action to take when a photo has been selected
/// </summary>
/// <param name="category">The category.</param>
private void OnCategorySelected(Category category)
{
_navigationFacade.NavigateToPhotoStream(category);
}
public void Init()
{
_category = new Category();
}
private void RefreshFilteredList(Category category = null)
{
FilteredCategories.Clear();
// Filter only the specific Category
if (category != null)
{
FilteredCategories.Add(category);
}
else
{
_categoryMatchFinder.SearchCategories(SearchText, Categories)
.ForEach(c => FilteredCategories.Add(c));
}
}
private async void OnAddCategory()
{
try
{
// Ask user if category should be created.
var confirmationResult = await
_dialogService.ShowYesNoNotification("CreateCategoryRequestConfirmation_Message",
"CreateCategoryRequestConfirmation_Title");
if (confirmationResult)
{
IsBusy = true;
// Validate category name.
_categoryMatchFinder.ValidateCategoryAcceptanceCriteria(SearchText, Categories);
var category = await _photoService.CreateCategory(SearchText);
// The created category needs to be added to the view
// and pre-selected so that the user can continue immediately.
Categories.Add(category);
RefreshFilteredList(category);
SelectedCategory = category;
}
}
catch (CategoryMatchedException)
{
await _dialogService.ShowNotification("CategoryAlreadyExists_Message", "CategoryAlreadyExists_Title");
}
catch (Exception)
{
await _dialogService.ShowGenericServiceErrorNotification();
}
finally
{
IsBusy = false;
}
}
/// <summary>
/// Navigates to the upload view to update data of
/// the existing photo.
/// </summary>
/// <param name="photo">The photo to update.</param>
/// <param name="category">The associated category.</param>
public void NavigateToUploadView(Photo photo, Category category)
{
Navigate(typeof(UploadViewModel), new UploadViewModelEditPhotoArgs
{
Photo = photo,
Category = category
}, false);
}
/// <summary>
/// Navigates to the photo stream view.
/// </summary>
/// <param name="category">The category.</param>
public void NavigateToPhotoStream(Category category)
{
NavigateToPhotoStream(category.ToCategoryPreview());
}
/// <summary>
/// Called when a photo has been uploaded successfully.
/// </summary>
/// <param name="category">The associated category.</param>
public Task OnUploadFinished(Category category)
{
_uploadFinishedAction.Invoke();
return Task.CompletedTask;
}
