public void WatchDrive(DriveModel dm)
{
if (!Directory.Exists(dm.Name) || Drives.ContainsKey(dm.Name))
{
return;
}
Drives.Add(dm.Name, dm);
FileSystemWatcher fileWatcher = new FileSystemWatcher(dm.Name);
fileWatcher.IncludeSubdirectories = true;
fileWatcher.NotifyFilter = NotifyFilters.FileName | NotifyFilters.LastWrite;
fileWatcher.Created += FileChanged;
fileWatcher.Changed += FileChanged;
fileWatcher.Deleted += FileChanged;
fileWatcher.Renamed += FileChanged;
fileWatcher.EnableRaisingEvents = true;
_watchers.Add(fileWatcher);
FileSystemWatcher folderWatcher = new FileSystemWatcher(dm.Name);
folderWatcher.IncludeSubdirectories = true;
folderWatcher.NotifyFilter = NotifyFilters.DirectoryName;
folderWatcher.Created += FolderChanged;
folderWatcher.Changed += FolderChanged;
folderWatcher.Deleted += FolderChanged;
folderWatcher.Renamed += FolderChanged;
folderWatcher.EnableRaisingEvents = true;
_watchers.Add(folderWatcher);
// NOTE: The changes of hidden attributes are not handled.
}
private void IfParentFolderExists(DirectoryInfo parent, DriveModel drive, Action <Folder> ifExists)
{
Folder folder = GetFolder(parent, drive);
if (folder == null)
{
App.Scanner.ScanUpdate(parent.FullName, drive);
RaiseChange(drive);
}
else
{
ifExists(folder);
}
}
private Folder GetFolder(DirectoryInfo parent, DriveModel drive)
{
string[] folders = parent.FullName.Split(new char[] { Path.DirectorySeparatorChar }, StringSplitOptions.RemoveEmptyEntries);
Folder folder = drive;
for (int i = 1; i < folders.Length; i++)
{
folder = folder.Folders.SingleOrDefault(f => f.NameEquals(folders[i]));
if (folder == null)
{
break;
}
}
return(folder);
}
private void FileChanged(object sender, FileSystemEventArgs e)
{
DirectoryInfo parent = new DirectoryInfo(Path.GetDirectoryName(e.FullPath));
if (IsItemInFilteredFolder(parent))
{
return;
}
DriveModel drive = Drives[parent.Root.Name];
lock (drive) {
switch (e.ChangeType)
{
case WatcherChangeTypes.Created:
case WatcherChangeTypes.Changed:
// There may be folder changed events coming in with LastWrite filter
IfParentFolderExists(parent, drive, folder => {
FileInfo fi = new FileInfo(e.FullPath);
if (fi.Exists)
{
WatFile file = folder.Files.SingleOrDefault(f => f.NameEquals(fi.Name));
if (file != null)
{
folder.Files.Remove(file);
}
if (fi.ShouldScan())
{
folder.Files.Add(App.Scanner.GetFile(fi, file));
folder.Files.Sort();
}
RaiseChange(drive);
}
});
break;
case WatcherChangeTypes.Deleted:
IfParentFolderExists(parent, drive, folder => {
int removed = folder.Files.RemoveAll(f => f.NameEquals(Path.GetFileName(e.Name)));
if (removed > 0)
{
RaiseChange(drive);
}
});
break;
case WatcherChangeTypes.Renamed:
IfParentFolderExists(parent, drive, folder => {
RenamedEventArgs rea = (RenamedEventArgs)e;
WatFile oldFile = folder.Files.SingleOrDefault(f => f.NameEquals(Path.GetFileName(rea.OldName)));
FileInfo fi = new FileInfo(e.FullPath);
if (oldFile != null)
{
folder.Files.Remove(oldFile);
}
if (fi.ShouldScan())
{
folder.Files.Add(App.Scanner.GetFile(fi, oldFile));
folder.Files.Sort();
}
RaiseChange(drive);
});
break;
}
}
}
private void RaiseChange(DriveModel drive)
{
drive.RaiseItemChanges();
drive.IsChanged = true;
}
private void FolderChanged(object sender, FileSystemEventArgs e)
{
DirectoryInfo parent = new DirectoryInfo(Path.GetDirectoryName(e.FullPath));
if (IsItemInFilteredFolder(parent))
{
return;
}
DriveModel drive = Drives[parent.Root.Name];
lock (drive) {
switch (e.ChangeType)
{
case WatcherChangeTypes.Created:
IfParentFolderExists(parent, drive, parentFolder => {
if (new DirectoryInfo(e.FullPath).ShouldScan())
{
App.Scanner.ScanUpdate(e.FullPath, drive);
RaiseChange(drive);
}
});
break;
case WatcherChangeTypes.Deleted:
IfParentFolderExists(parent, drive, parentFolder => {
int removed = parentFolder.Folders.RemoveAll(f => f.NameEquals(Path.GetFileName(e.Name)));
if (removed > 0)
{
RaiseChange(drive);
}
});
break;
case WatcherChangeTypes.Renamed:
IfParentFolderExists(parent, drive, parentFolder => {
RenamedEventArgs rea = (RenamedEventArgs)e;
Folder oldFolder = parentFolder.Folders.SingleOrDefault(f => f.NameEquals(Path.GetFileName(rea.OldName)));
if (new DirectoryInfo(e.FullPath).ShouldScan())
{
if (oldFolder == null)
{
App.Scanner.ScanUpdate(e.FullPath, drive);
}
else
{
oldFolder.Name = Path.GetFileName(e.Name);
parentFolder.Folders.Sort();
}
RaiseChange(drive);
}
else if (oldFolder != null)
{
parentFolder.Folders.Remove(oldFolder);
RaiseChange(drive);
}
});
break;
}
}
}
