protected virtual void OnNewItemArrived(FileSystemInfoEventArgs fileSystemInfoEventArgs)
{
if (NewItemArrived != null)
{
NewItemArrived(this, fileSystemInfoEventArgs);
}
}
// Invoked when new scanner has new item
public void OnNewItemArrived(object sender, FileSystemInfoEventArgs e)
{
if (e != null && e.Item != null)
{
_processingQueue.Enqueue(e.Item);
}
}
IEnumerable <FileSystemInfo> GetFileSystemInfo(DirectoryInfo directoryInfo)
{
var allElements = directoryInfo.GetFileSystemInfos();
foreach (var fileSystemInfo in allElements)
{
var itemFoundEventArgs = new FileSystemInfoEventArgs(fileSystemInfo.FullName);
var itemFilteredEventArgs = new FilteredFileSystemInfoEventArgs(fileSystemInfo.FullName);
if (fileSystemInfo is FileInfo)
{
FileFound?.Invoke(this, itemFoundEventArgs);
if (itemFoundEventArgs.StopSearch)
{
yield break;
}
if (_matchPredicate(fileSystemInfo) && !itemFoundEventArgs.Exclude)
{
FileFiltered?.Invoke(this, itemFilteredEventArgs);
if (itemFilteredEventArgs.StopSearch)
{
yield break;
}
if (!itemFilteredEventArgs.Exclude)
{
yield return(fileSystemInfo);
}
}
}
else if (fileSystemInfo is DirectoryInfo nextDirectory)
{
DirectoryFound?.Invoke(this, itemFoundEventArgs);
if (itemFoundEventArgs.StopSearch)
{
yield break;
}
if (_matchPredicate(fileSystemInfo) && !itemFoundEventArgs.Exclude)
{
foreach (var nextFileSystemInfo in GetFileSystemInfo(nextDirectory))
{
yield return(nextFileSystemInfo);
}
DirectoryFiltered?.Invoke(this, itemFilteredEventArgs);
if (itemFilteredEventArgs.StopSearch)
{
yield break;
}
if (!itemFilteredEventArgs.Exclude)
{
yield return(fileSystemInfo);
}
}
}
}
}
private void NotifyNewItemArrived(FileSystemInfo fileSystemInfo)
{
if (fileSystemInfo == null)
{
return;
}
FileSystemInfoEventArgs fileSystemInfoEventArgs = new FileSystemInfoEventArgs();
fileSystemInfoEventArgs.Item = fileSystemInfo;
OnNewItemArrived(fileSystemInfoEventArgs);
}
/// <summary>
/// Identicate what should be done with current file system item.
/// </summary>
/// <typeparam name="T">FileSystemInfo type.</typeparam>
/// <param name="fileSystemInfoItem">File System Info object that needs to be validated.</param>
/// <param name="filter">Filter Delegate.</param>
/// <param name="itemFound">Event on File System Item Finded.</param>
/// <param name="itemFiltered">Event on File System Item Filtered.</param>
/// <returns>Action that needs to be performed.</returns>
private bool Validate <T>(T fileSystemInfoItem,
Func <T, bool> filter,
EventHandler <FileSystemInfoEventArgs <T> > itemFound,
EventHandler <FileSystemInfoEventArgs <T> > itemFiltered) where T : FileSystemInfo
{
FileSystemInfoEventArgs <T> eventArgs = new FileSystemInfoEventArgs <T>(fileSystemInfoItem, false);
OnItemFindedEvent(itemFound, eventArgs);
if (filter == null || eventArgs.Skip)
{
return(eventArgs.Skip);
}
if (filter(fileSystemInfoItem))
{
eventArgs = new FileSystemInfoEventArgs <T>(fileSystemInfoItem, false);
OnItemFindedEvent(itemFiltered, eventArgs);
return(eventArgs.Skip);
}
return(false);
}
protected virtual void OnFilteredItemFindedEvent <T>(EventHandler <FileSystemInfoEventArgs <T> > eventHandler, FileSystemInfoEventArgs <T> eventArgs) where T : FileSystemInfo
{
var x = eventHandler;
if (x != null)
{
x(this, eventArgs);
}
}
