private IEnumerable <FileSystemInfoBase> GetFilteredItems(DirectoryInfoBase directory)
{
var breakSearch = false;
foreach (var item in directory.GetFileSystemInfos())
{
if (Status == FileSystemVisitorStatus.Stopped)
{
break;
}
var excludeItem = false;
var dir = item as DirectoryInfoBase;
if (dir != null)
{
DirectoryFoundEvent?.Invoke(dir, ref breakSearch, ref excludeItem);
if (!breakSearch && !excludeItem)
{
foreach (var i in GetFilteredItems(dir)) //going recursion here
{
yield return(i);
}
}
}
else
{
var file = item as FileInfoBase;
if (file != null)
{
FileFoundEvent?.Invoke(file, ref breakSearch, ref excludeItem);
}
}
if (breakSearch)
{
Status = FileSystemVisitorStatus.Stopped;
}
if (excludeItem)
{
continue;
}
if (Filter != null && !Filter.Invoke(item))
{
continue;
}
FilterItemActions(item, ref breakSearch, ref excludeItem);
if (!excludeItem)
{
yield return(item);
}
else if (breakSearch)
{
Status = FileSystemVisitorStatus.Stopped;
}
}
}
private IEnumerable <FileSystemInfoBase> GetFilteredItemsSecondWay(DirectoryInfoBase directory)
{
var breakSearch = false;
foreach (var dir in directory.EnumerateDirectories())
{
if (Status == FileSystemVisitorStatus.Stopped)
{
break;
}
var excludeItem = false;
DirectoryFoundEvent?.Invoke(dir, ref breakSearch, ref excludeItem);
if (!breakSearch && !excludeItem)
{
foreach (var i in GetFilteredItemsSecondWay(dir)) //going recursion here
{
yield return(i);
}
}
if (breakSearch)
{
Status = FileSystemVisitorStatus.Stopped;
}
if (excludeItem)
{
continue;
}
if (Filter != null && !Filter.Invoke(dir))
{
continue;
}
yield return(dir);
}
foreach (var file in GetFilteredFiles(directory))
{
yield return(file);
}
}