/// <summary>
/// Loads ads from a source URI. Note, this is called automatically if you set the source before the MediaLoading event fires and normally does not need to be called.
/// </summary>
/// <param name="source">The VMAP source URI</param>
/// <param name="c">A cancellation token that allows you to cancel a pending operation</param>
/// <returns>A task to await on.</returns>
public async Task LoadAds(Uri source, CancellationToken c)
{
adBreaks.Clear();
var cancellationToken = CancellationTokenSource.CreateLinkedTokenSource(c, cts.Token).Token;
#if SILVERLIGHT
var vmap = await VmapFactory.LoadSource(source, cancellationToken);
#else
var vmap = await VmapFactory.LoadSource(source).AsTask(cancellationToken);
#endif
foreach (var adBreak in vmap.AdBreaks)
{
CreateAdvertisement(adBreak);
}
}
async void timer_Tick(object sender, object e)
{
try
{
#if SILVERLIGHT
var vmap = await VmapFactory.LoadSource(Source, cts.Token);
#else
var vmap = await VmapFactory.LoadSource(Source).AsTask(cts.Token);
#endif
// remove all ads that were not found new info
foreach (var adBreak in adBreaks.Where(existingBreak => !vmap.AdBreaks.Any(newBreak => newBreak.BreakId == existingBreak.Value.BreakId)))
{
Advertisements.Remove(adBreak.Key);
}
// create new ads for those that do not already exist
foreach (var adBreak in vmap.AdBreaks.Where(newBreak => !adBreaks.Values.Any(existingBreak => existingBreak.BreakId == newBreak.BreakId)))
{
CreateAdvertisement(adBreak);
}
}
catch { /* ignore */ }
}