/// <summary>
/// Retrieve the equivalent item if it already exists in the database,
/// if it does not, fill metadata using the metadata provider, download images and register the item to the
/// database.
/// </summary>
/// <param name="item">The item to retrieve or fill and register</param>
/// <typeparam name="T">The type of the item</typeparam>
/// <returns>The existing or filled item.</returns>
private async Task <T> _RegisterAndFill <T>(T item)
where T : class, IResource, IThumbnails, IMetadata
{
if (item == null || string.IsNullOrEmpty(item.Slug))
{
return(null);
}
T existing = await _libraryManager.GetOrDefault <T>(item.Slug);
if (existing != null)
{
await _libraryManager.Load(existing, x => x.ExternalIDs);
return(existing);
}
item = await _metadataProvider.Get(item);
await _thumbnailsManager.DownloadImages(item);
switch (item)
{
case Show show when show.People != null:
foreach (PeopleRole role in show.People)
{
await _thumbnailsManager.DownloadImages(role.People);
}
break;
case Season season:
season.Title ??= $"Season {season.SeasonNumber}";
break;
}
return(await _libraryManager.CreateIfNotExists(item));
}