void CheckOrUpdateCatalog()
{
var progress = Log.Action(2, "Checking and/or updating catalog...");
var books = new BookSource { Log = Log };
var volumes = new VolumeSource { Log = Log };
if (!string.IsNullOrEmpty(ActualDirectory)) {
books.SetDirectory(ActualDirectory);
volumes.SetDirectory(ActualDirectory);
}
var updater = new CatalogUpdater { Log = Log };
Date localDate = Date.MinValue;
if (Always || updater.ShouldUpdate(books, volumes, out localDate)) {
progress.Continue("Downloading remote catalog...");
var catalog = new Catalog { Log = Log };
if (!string.IsNullOrEmpty(URL))
catalog.SetUrl(URL);
using (var stream = catalog.Open())
updater.TryUpdate(stream, books, volumes,
remoteDate => localDate == Date.MinValue || localDate < remoteDate,
() => ShouldProcess("Catalog", "Update") && (Force ||
ShouldContinue("Do you really want to update the local catalog?",
"Catalog Update")));
}
progress.Finish();
}