/// <summary>
/// Method called when PeriodicTask is invoked.
/// </summary>
/// <param name="task">Periodic task invoked.</param>
protected override void OnInvoke(ScheduledTask task)
{
if (!new SettingsController().CatURLExists())
{
// Cat URL doesn't exist, so parse RSS.
this.ParseRSSFeed();
}
else
{
// Cat URL exists, so perform date check.
SettingsController settingsController = new SettingsController();
if (settingsController.LastUpdatedExists())
{
// lastUpdated setting exists, so check.
DateTime lastUpdated = new SettingsController().GetLastUpdated();
DateTime now = DateTime.Now;
if (lastUpdated.Date.CompareTo(now.Date) < 0)
{
// lastUpdated date is before Today, so parse RSS Feed to get a new image.
this.ParseRSSFeed();
}
}
else
{
// lastUpdated setting doesn't exist, so parse RSS.
this.ParseRSSFeed();
}
}
}
/// <summary>
/// Method to perform actions required once RSS Feed has been downloaded.
/// </summary>
/// <param name="sender">Sender object</param>
/// <param name="e">Event arguments object</param>
private void DownloadStringCompleted(object sender, DownloadStringCompletedEventArgs e)
{
if (e.Error != null)
{
// ERROR - Downloading RSS Feed. As can't continue PeriodicTask completes.
this.NotifyComplete();
}
else
{
// RSS feed downloaded successfully, so get new image URL.
string catImageURL = this.GetTodaysCatImageURL(e.Result);
if (!catImageURL.Equals(string.Empty))
{
// Obtained cat URL successfully.
Deployment.Current.Dispatcher.BeginInvoke(() =>
{
SettingsController settingsController = new SettingsController();
StorageController storageController = new StorageController();
// Set cat URI
settingsController.SetCatURL(catImageURL);
// Set last updated setting.
settingsController.SetLastUpdated();
if (storageController.DownloadedCatImageExists())
{
// Cat image exists in memory, so delete.
storageController.DeleteDownloadedCatImage();
}
// Update live tile.
new LiveTileController().UpdateLiveTile();
// Notify PeriodicTask completion.
NotifyComplete();
});
}
else
{
// ERROR - In getting Cat URL. As can't continue PeriodiTask completes.
this.NotifyComplete();
}
}
}
/// <summary>
/// Method to update content on the Application page.
/// </summary>
private void UpdateDisplay()
{
// Set text for date field.
this.DateTextBlock.Text = DateTime.Now.ToString(LolCatCalendarResources.DateFormat);
SettingsController settingsController = new SettingsController();
StorageController storageController = new StorageController();
if (settingsController.CatURLExists())
{
// Cat URL exists so use that image.
if (storageController.DownloadedCatImageExists())
{
// Downloaded cat image exists, so display that.
this.img.Source = storageController.GetDownloadedCatImage();
}
else
{
// Downloaded cat iamge doesn't exist, so display from Internet and then download.
string url = settingsController.GetCatURL();
this.img.Source = new BitmapImage(new Uri(url));
new ImageDownloader().DownloadCatImage(url);
}
}
else
{
// Cat URL doesn't exist, so get default cat image.
this.img.Source = storageController.GetDefaultCatImage();
}
}