/// <summary>
/// Work that should be performed from the background agent.
/// </summary>
/// <returns>Awaitable task is returned.</returns>
public async Task TimedBackgroundWorkAsync(CancellationToken ct)
{
try
{
// Perform work that needs to be done on a background task/agent...
if (this.AuthManager?.IsAuthenticated() != true)
{
return;
}
this.Notifications.DisplayToast(this.ViewModel);
// SAMPLE - Load data from your API, do any background work here.
using (var api = new ClientApi())
{
var data = await api.GetItems(ct);
if (data != null)
{
var items = data.ToObservableCollection();
if (items.Count > 0)
{
var index = DateTime.Now.Second % items.Count;
this.Notifications.DisplayToast(items[index]);
}
}
ct.ThrowIfCancellationRequested();
if (BackgroundWorkCost.CurrentBackgroundWorkCost <= BackgroundWorkCostValue.Medium)
{
// Update primary tile
await this.Notifications.CreateOrUpdateTileAsync(new ModelList <ItemModel>(data));
ct.ThrowIfCancellationRequested();
// Update all tiles pinned from this application
await this.Notifications.UpdateAllSecondaryTilesAsync(ct);
}
}
}
catch (OperationCanceledException)
{
throw;
}
catch (Exception ex)
{
this.Logger.LogErrorFatal(ex, "Failed to complete BackgroundWork from background task due to: {0}", ex.Message);
throw ex;
}
}
protected override async Task OnRefreshAsync(bool forceRefresh, CancellationToken ct)
{
if (forceRefresh || this.Items == null || this.HasLocationChanged)
{
this.ShowBusyStatus(Resources.TextLoading, this.Items == null || this.Items.Count == 0);
using (var api = new ClientApi())
{
this.Items.UpdateRange(await api.GetItems(ct), true);
this.LastUpdated = DateTime.Now;
}
// Save to cache
await this.SaveToCacheAsync(() => this.Items);
await this.SaveToCacheAsync(() => this.LastUpdated);
}
}