private async Task RegisterBackgroundTask()
{
foreach (var task in BackgroundTaskRegistration.AllTasks)
{
task.Value.Unregister(true);
}
BackgroundTaskBuilder builder = new BackgroundTaskBuilder();
builder.Name = "PodCatchHouseKeeping";
builder.TaskEntryPoint = "PodCatch.BackgroundTasks.BackgroundTask";
builder.SetTrigger(new MaintenanceTrigger(15, false));
builder.AddCondition(new SystemCondition(SystemConditionType.InternetAvailable));
builder.AddCondition(new SystemCondition(SystemConditionType.UserNotPresent));
try
{
BackgroundAccessStatus status = await BackgroundExecutionManager.RequestAccessAsync();
IBackgroundTaskRegistration backgroundTaskRegistration = builder.Register();
backgroundTaskRegistration.Completed += ((s, a) => UIThread.RunInBackground(() => Data.Load(true)));
}
catch (Exception ex)
{
Tracer.TraceError("Error registering background task: {0}", ex);
}
}
private async void ExecuteSearchForPodcastCommand()
{
m_View.BottomAppBar.IsOpen = false;
// show input dialog
InputMessageDialog dlg = new InputMessageDialog("Search term or RSS feed URL:");
bool result = await dlg.ShowAsync();
// cancel pressed
if (result == false)
{
return;
}
string searchTerm = dlg.TextBox.Text;
IEnumerable <Podcast> searchResults;
searchResults = await UIThread.RunInBackground <IEnumerable <Podcast> >(async() =>
{
return(await Data.Search(searchTerm));
});
await UIThread.Dispatch(async() =>
{
await Data.UpdateSearchResults(searchResults);
});
}
public async Task OnPodcastTapped(PodcastSummaryViewModel podcast, Point position)
{
if (m_ShowingPopUp == true)
{
return;
}
m_ShowingPopUp = true;
try
{
PopupMenu popupMenu = new PopupMenu();
// this is useful for debugging
//popupMenu.Commands.Add(new UICommand(){Id=1, Label="Copy RSS feed URL to clipboard"});
if (Data.IsPodcastInFavorites(podcast.Data))
{
popupMenu.Commands.Add(new UICommand()
{
Id = 2, Label = "Remove from favorites"
});
}
else
{
popupMenu.Commands.Add(new UICommand()
{
Id = 3, Label = "Add to favorites"
});
}
IUICommand selectedCommand = await popupMenu.ShowAsync(position);
if (selectedCommand == null)
{
return;
}
switch ((int)selectedCommand.Id)
{
case 1: // Copy RSS feed to clipboard
DataPackage dataPackage = new DataPackage();
dataPackage.SetText(podcast.Data.PodcastUri);
Clipboard.SetContent(dataPackage);
break;
case 2: // Remove from favorites
Task t = Data.RemoveFromFavorites(podcast.Data);
m_View.NavigationHelper.GoBack();
break;
case 3: // Add to favorites
// Don't wait for this - It will leave the m_ShowingPopUp open
await UIThread.RunInBackground(() => Data.AddToFavorites(podcast.Data));
podcast.DownloadEpisodes();
break;
}
}
finally
{
m_ShowingPopUp = false;
}
}
private void ExecuteAllUnplayedCommand()
{
foreach (Episode episode in m_AllEpisodes)
{
episode.Played = false;
}
UIThread.RunInBackground(() => Data.Store());
}
public async void ExecuteEpisodeRightClickedCommand(EpisodeViewModel episode, Point point)
{
PopupMenu popupMenu = new PopupMenu();
if (episode.Played)
{
popupMenu.Commands.Add(new UICommand()
{
Id = 1, Label = "Mark as unplayed"
});
}
else
{
popupMenu.Commands.Add(new UICommand()
{
Id = 2, Label = "Mark as played"
});
}
if (episode.Data.State is EpisodeStateDownloaded)
{
popupMenu.Commands.Add(new UICommand()
{
Id = 3, Label = "Download again"
});
}
try
{
IUICommand selectedCommand = await popupMenu.ShowAsync(point);
if (selectedCommand == null)
{
return;
}
switch ((int)selectedCommand.Id)
{
case 1:
episode.Data.Played = false;
UIThread.RunInBackground(() => Data.Store());
break;
case 2:
episode.Data.Played = true;
UIThread.RunInBackground(() => Data.Store());
break;
case 3:
Task t = episode.Data.PostEvent(EpisodeEvent.Refresh);
break;
}
}
catch (Exception ex)
{
Tracer.TraceError("PodcastPage.xaml.Grid_RightTapped() - Error occured displaying popup menu {0}", ex);
}
}
public void DownloadEpisodes()
{
int i = 0;
foreach (Episode episode in Data.Episodes)
{
if (i++ > 3)
{
break;
}
UIThread.RunInBackground(() => episode.Download());
}
}
public StartPageViewModel(StartPage startPage, IServiceContext serviceContext)
: base(serviceContext.GetService <IPodcastDataSource>(), serviceContext)
{
m_View = startPage;
m_MediaPlayer = serviceContext.GetService <IMediaPlayer>();
ObservableCollection <PodcastGroup> podcastGroups = Data.GetGroups();
podcastGroups.CollectionChanged += OnPodcastGroupsChanged;
// load from cache
UIThread.RunInBackground(() => Data.Load(false));
Task t = RegisterBackgroundTask();
UpdateFields();
}
private async void ExecuteRefreshCommand()
{
MessageDialog dlg = null;
Podcast podcastDataItem = Podcast;
try
{
await UIThread.RunInBackground(async() => await podcastDataItem.RefreshFromRss(true));
await podcastDataItem.Store();
}
catch (Exception ex)
{
dlg = new MessageDialog(string.Format("Unable to refresh {0}. {1}", podcastDataItem.Title, ex.Message));
}
if (dlg != null)
{
await dlg.ShowAsync();
}
}
