/// <summary>
/// Deteltes items from depth-first items collection.
/// This operation WILL FAIL if collection is not ordered depth-first.
/// </summary>
/// <param name="items">Depth-first file system items collection.</param>
/// <param name="force">Set true to remove read-only items.</param>
/// <returns>True if all items were removed.</returns>
private bool Delete(IEnumerable <IItem> items, bool force = false)
{
ProgressEventArgs currentProgress = null;
if (ReportProgress)
{
currentProgress = new ProgressEventArgs(items.Count(), CalculateSize ? items.Sum(i => i.Size) : 0);
}
bool success = true;
foreach (var item in items)
{
try {
if (item.FileSystem.RemoveItem(item.Path, force))
{
if (ReportProgress)
{
currentProgress.Item++;
if (CalculateSize)
{
currentProgress.Bytes += item.Size;
}
(Progress as IProgress <ProgressEventArgs>).Report(currentProgress);
}
}
else
{
success = false;
Deferred.Add(item);
}
} catch (Exception x) {
success = false;
Deferred.Add(item);
Errors.Add(new Error(item.Path, x.Message));
}
}
return(success);
}
/// <summary>
/// Deletes a file system item with all optional subitems if applicable.
/// </summary>
/// <param name="item">File or directory item.</param>
/// <param name="force">Set true to remove read-only items.</param>
/// <returns>True if all items were removed.</returns>
private bool Delete(IItem item, bool force = false)
{
ProgressEventArgs currentProgress = null;
if (item.FileSystem.IsReadOnly || !item.FileSystem.CanRemoveItems)
{
return(false);
}
if (!item.FileSystem.Exists(item.Path))
{
return(false);
}
if (item.IsFile)
{
try {
return(item.FileSystem.RemoveItem(item.Path, force));
}
catch (Exception x) {
Errors.Add(new Error(item.Path, x.Message));
return(false);
}
}
if (item.IsDirectory)
{
var node = item.GetNode();
bool success = true;
if (ReportProgress)
{
currentProgress = new ProgressEventArgs(node.TotalCount, CalculateSize ? node.DescendantFiles.Sum(i => i.Size) : 0);
}
foreach (var leaf in node.Descendants)
{
try {
if (leaf.FileSystem.RemoveItem(leaf.Path, force))
{
if (ReportProgress)
{
currentProgress.Item++;
if (CalculateSize)
{
currentProgress.Bytes += leaf.Size;
}
(Progress as IProgress <ProgressEventArgs>).Report(currentProgress);
}
}
else
{
Deferred.Add(leaf);
}
}
catch (Exception x) {
success = false;
Deferred.Add(leaf);
Errors.Add(new Error(leaf.Path, x.Message));
}
}
try {
node.FileSystem.RemoveItem(node.Path, force);
} catch (Exception x) {
success = false;
Deferred.Add(node);
Errors.Add(new Error(node.Path, x.Message));
}
return(success);
}
return(false);
}
