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();
}
public bool ShouldUpdate(BookSource books, VolumeSource volumes, out Date date)
{
var progress = Log.Action(3, "Checking local catalog...");
progress.Continue("Opening local catalog...");
if (books.Exists && volumes.Exists) {
progress.Continue("Getting local creation date...");
date = Date.Min(books.GetCreated(), volumes.GetCreated());
Log.Verbose("Local creation date: {0}.", date);
if (new Date(DateTime.Now) == date) {
Log.Warning("Local catalog up-to-date.");
progress.Finish();
return false;
}
} else {
date = Date.MinValue;
}
progress.Finish();
return true;
}
public bool TryUpdate(Stream catalogStream, BookSource books, VolumeSource volumes,
Func<Date, bool> update, Func<bool> confirm)
{
var progress = Log.Action(5, "Trying catalog update...");
progress.Continue("Opening remote catalog...");
var parser = new CatalogParser { Log = Log };
using (var reader = parser.Open(catalogStream)) {
progress.Continue("Checking remote creation date...");
var date = parser.GetCreated(reader);
Log.Verbose("Remote creation date: {0}.", date);
if (update(date)) {
progress.Continue("Updating local catalog...");
string bookPath = null, volumePath = null;
try {
using (var bookStream = books.Create(out bookPath))
using (var volumeStream = volumes.Create(out volumePath))
Convert(parser, reader, date, bookStream, volumeStream);
progress.Continue("Copying converted catalog...");
if (confirm()) {
books.Update(bookPath);
volumes.Update(volumePath);
Log.Verbose("Local catalog updated.");
progress.Finish();
return true;
}
} finally {
if (bookPath != null)
IOUtility.DeleteTempFile(bookPath);
if (volumePath != null)
IOUtility.DeleteTempFile(volumePath);
}
Log.Warning("Local catalog left intact.");
progress.Finish();
return false;
}
Log.Warning("Local catalog up-to-date.");
progress.Finish();
return false;
}
}