/// <summary>
/// Checks whether the <paramref name="action"/> has any aspects and if not
/// tries to restore them from the media library.
/// </summary>
/// <param name="action">The action to check.</param>
/// <returns>True if the aspects were present or successfully restored.</returns>
protected async Task <bool> TryRestoreAspects(FanArtManagerAction action)
{
//Already has aspects, nothing to do
if (action.Aspects != null)
{
return(true);
}
//No aspects, this resource was restored from disk, try and restore the aspects from the media library.
//Throttle the number of concurrent queries To avoid a spike during startup.
await _loadItemThrottle.WaitAsync(_cts.Token);
try
{
IMediaLibrary mediaLibrary = ServiceRegistration.Get <IMediaLibrary>();
MediaItemQuery query = new MediaItemQuery(null,
mediaLibrary.GetManagedMediaItemAspectMetadata().Keys,
new MediaItemIdFilter(action.MediaItemId));
var items = mediaLibrary.Search(query, false, null, true);
if (items != null && items.Count > 0)
{
action.Aspects = items[0].Aspects;
return(true);
}
ServiceRegistration.Get <ILogger>().Warn("FanArtActionBlock: Unable to restore FanArtAction, media item with id {0} was not found in the media library", action.MediaItemId);
return(false);
}
finally
{
_loadItemThrottle.Release();
}
}
/// <summary>
/// Checks whether the <paramref name="actions"/> has any aspects and if not
/// tries to load them from the media library.
/// </summary>
/// <param name="actions">The action to check.</param>
/// <returns>True if the aspects were present or successfully loaded.</returns>
protected async Task LoadAspects(FanArtManagerAction[] actions)
{
var mediaItemIds = actions.Where(a => a.Type == ActionType.Collect && (a.Aspects == null || a.Aspects.Count == 0))
.Select(a => a.MediaItemId).Distinct();
var queryFilter = new MediaItemIdFilter(mediaItemIds);
if (queryFilter.MediaItemIds.Count == 0)
{
return;
}
IMediaLibrary mediaLibrary = ServiceRegistration.Get <IMediaLibrary>();
MediaItemQuery query = new MediaItemQuery(null,
mediaLibrary.GetManagedMediaItemAspectMetadata().Keys,
queryFilter);
// Throttle the number of concurrent queries To avoid spikes when loading aspects.
await _loadItemThrottle.WaitAsync(_cts.Token);
try
{
var items = mediaLibrary.Search(query, false, null, true);
if (items != null && items.Count > 0)
{
foreach (var item in items)
{
foreach (var action in actions)
{
if (action.MediaItemId == item.MediaItemId)
{
action.Aspects = item.Aspects;
break;
}
}
}
}
else
{
ServiceRegistration.Get <ILogger>().Warn("FanArtActionBlock: Unable to load aspects, no matching media items were found in the media library");
}
}
catch (Exception ex)
{
ServiceRegistration.Get <ILogger>().Error("FanArtActionBlock: Error loading aspects from the media library", ex);
}
finally
{
_loadItemThrottle.Release();
}
}