private void Archives_CollectionChanged(object sender, NotifyCollectionChangedEventArgs e)
{
if (ignoreChanges)
{
return;
}
ignoreChanges = true;
// If the collection was reset, then e.OldItems is empty. Just clear and reload.
if (e.Action == System.Collections.Specialized.NotifyCollectionChangedAction.Reset)
{
Archives.Clear();
foreach (var archive in index.Archives)
{
Archives.Add(new ArchiveViewModel(archive, this));
}
}
else
{
// Remove items from collection.
var toRemove = new List <ArchiveViewModel>();
if (null != e.OldItems && e.OldItems.Count > 0)
{
foreach (var item in e.OldItems)
{
foreach (var existingItem in Archives)
{
if (existingItem.IsViewFor((Archive)item))
{
toRemove.Add(existingItem);
}
}
}
}
foreach (var item in toRemove)
{
Archives.Remove(item);
}
// Add new items to the collection.
if (null != e.NewItems && e.NewItems.Count > 0)
{
foreach (var item in e.NewItems)
{
Archives.Add(new ArchiveViewModel((Archive)item, this));
}
}
}
ignoreChanges = false;
}
private void CloseArchiveButton_Click(object sender, RoutedEventArgs e)
{
Button button = e.OriginalSource as Button;
if ((object)button != null)
{
foreach (Archive archive in Archives.Where(archive => (int)button.DataContext == archive.ID).ToList())
{
Archives.Remove(archive);
}
}
}
/// <summary>
/// Removes the specified archive and all children from the index.</summary>
/// <param name="writeToDb">If true, the object will be removed from the Database.</param>
public async Task RemoveArchiveAsync(Archive archive, bool writeToDb)
{
if (archive is null)
{
return;
}
if (Archives.Where(x => x.Volume.Equals(archive.Volume)).Count() < 2)
{
// No other archive shares the logical volume of the
// set that's about to be deleted, it can therefore be removed
LogicalVolumes.Remove(archive.Volume);
if (writeToDb)
{
await Database.DeleteLogicalVolumeAsync(archive.Volume);
}
}
// Get a list of all hashes related to the current archive,
// remove all nodes from these hashes.
var archiveHashes = archive.GetFileHashes();
await archive.ClearAsync();
archive.Dispose();
// Get hashes in the collection with node count 0
// these can be removed from the index
var emptyHashes = archiveHashes.Where(x => x.NodeCount.Equals(0)).ToList();
emptyHashes.ForEach(x => Hashes.Remove(x));
if (writeToDb)
{
await Database.BatchDeleteFileHashAsync(emptyHashes);
}
Archives.Remove(archive);
//NotifyPropertyChanged("Archive");
if (writeToDb)
{
await Database.DeleteArchiveAsync(archive);
}
}
