private async Task <NewChaptersEventArgs> DownloadMissing(SubscriptionItem sub)
{
var missingChapters = await _subscriptionService.DownloadMissingChapters(sub).ConfigureAwait(false);
if (!missingChapters.Any())
{
return(new NewChaptersEventArgs(sub.Name, missingChapters));
}
sub.KnownChapters.UnionWith(missingChapters);
await _subscriptionRepository.Save(sub).ConfigureAwait(false);
return(new NewChaptersEventArgs(sub.Name, missingChapters));
}
