private async void UpdateQuestionsView(bool forceQuery)
{
StatusBlock.Visibility = Visibility.Collapsed;
await QuestionsManager.LoadAsync();
IList <BindableQuestion> list = null;
if (!forceQuery)
{
list = QuestionsManager.GetSortedQuestions();
}
if (list == null || list.Count == 0)
{
// Deleting sites or tags cleans the questions collection. Query again.
LoadingBar.ShowPaused = false;
await FeedManager.QueryWebsitesAsync();
LoadingBar.ShowPaused = true;
list = QuestionsManager.GetSortedQuestions();
if (list.Count == 0)
{
StatusBlock.Visibility = Visibility.Visible;
}
}
QuestionsManager.DisplayQuestions(QuestionsView, list);
}
private void OnTaskCompleted(BackgroundTaskRegistration sender, BackgroundTaskCompletedEventArgs args)
{
string message = sender.Name + " completed on " + DateTime.Now;
string title = "Task Completed";
// When a task completed, unload questions is required, so they get loaded from the file.
// It seems that the background task and the app process do not share the same QuestionsManager
// static vars.
QuestionsManager.Unload();
HandleTaskCompletedOrDataChanged(message, title);
}
/// <summary>
/// Invoked when the application is launched normally by the end user. Other entry points
/// will be used when the application is launched to open a specific file, to display
/// search results, and so forth.
/// </summary>
/// <param name="args">Details about the launch request and process.</param>
protected override async void OnLaunched(LaunchActivatedEventArgs args)
{
Frame rootFrame = Window.Current.Content as Frame;
// Do not repeat app initialization when the Window already has content,
// just ensure that the window is active
if (rootFrame == null)
{
// Create a Frame to act as the navigation context and navigate to the first page
rootFrame = new Frame();
if (args.PreviousExecutionState == ApplicationExecutionState.Terminated)
{
//TODO: Load state from previously suspended application
}
// Place the frame in the current Window
Window.Current.Content = rootFrame;
}
if (rootFrame.Content == null)
{
// When the navigation stack isn't restored navigate to the first page,
// configuring the new page by passing required information as a navigation
// parameter
// Maybe we received an unpdated "read list" while the app was not running. Make sure
// to remove the questions that are listed in the "read list".
SettingsManager.Load();
await QuestionsManager.LoadAsync();
await QuestionsManager.RemoveReadQuestionsUpdateTileAndBadgeAndSaveAsync();
bool isNewApp = SettingsManager.IsEmpty();
Type initialPage = typeof(ItemsPage);
if (isNewApp)
{
initialPage = typeof(TutorialPage);
}
if (!rootFrame.Navigate(initialPage, args.Arguments))
{
throw new Exception("Failed to create initial page");
}
}
// Ensure the current window is active
Window.Current.Activate();
// Add privacy policy command.
SettingsPane.GetForCurrentView().CommandsRequested += AddSettingsCommand;
}
private void MarkReadButton_Click(object sender, RoutedEventArgs e)
{
List <string> keysToDelete = new List <string>();
foreach (BindableQuestion question in QuestionsView.SelectedItems)
{
keysToDelete.Add(question.Id);
}
QuestionsManager.RemoveQuestionsAndSave(keysToDelete);
// Do not force a query. We are just removing some questions,
// the list may have more questions.
UpdateQuestionsView(false);
}
private void MarkAllReadButton_Click(object sender, RoutedEventArgs e)
{
if (QuestionsView.Items.Count == 0)
{
// There are no question, there is nothing to do.
return;
}
// Clear questions in the frontend and in the backend.
QuestionsView.ItemsSource = null;
QuestionsManager.RemoveQuestionsAndSave(null, null);
FeedManager.ClearTileAndBadge();
RefreshButton_Click(null, null);
}
private async void OnDataChanged(ApplicationData sender, object args)
{
string message = "Application data " + sender.Version + " synchronized on " + DateTime.Now;
string title = "Roaming Application Data Synchronized";
// When data changes. Settings should be unloaded/loaded so websites get synchronized.
SettingsManager.Unload();
SettingsManager.Load();
// Also unload and load read-list.
ReadListManager.Unload();
// When data changes, the read-list may contain new read-questions.
await QuestionsManager.RemoveReadQuestionsUpdateTileAndBadgeAndSaveAsync();
HandleTaskCompletedOrDataChanged(message, title);
}
private async Task ValidateAndAddTagAsync(string tag)
{
String tagEncoded = WebUtility.UrlEncode(tag.Trim());
await QuestionsManager.LoadAsync();
AddQuestionsResult result = await FeedManager.QueryTagAsync(website.ToString(), tagEncoded);
if (result.FileFound)
{
website.AddTagAndSave(TagsView, tag);
// Tag added successfully, clear the text.
TagBox.Text = "";
}
else
{
// Display red color while we figure it out a better way to diplay errors.
TagBox.Foreground = new SolidColorBrush(Colors.Red);
}
}
