public ServerEvents(WebShellFolderServer server)
{
if (server == null)
{
throw new ArgumentNullException(nameof(server));
}
Server = server;
// build SignalR connection
_connection = new HubConnectionBuilder()
.WithUrl(WebApi.RootUrl + "events")
.WithAutomaticReconnect()
.Build();
_connection.Closed += async(error) =>
{
// restart
await Task.Delay(new Random().Next(0, 5) * 1000).ConfigureAwait(false);
await _connection.StartAsync().ConfigureAwait(false);
};
// must match server's IFileSystemEvents method signature
// Change(Guid id, Guid itemId, Guid parentId, WatcherChangeTypes types, DateTime creationTimeUtc, string oldName);
_connection.On <Guid, Guid, Guid, WatcherChangeTypes, DateTime, string, Guid?>("Change", (id, itemId, parentId, type, creationTimeUtc, oldName, oldParentId) =>
{
// invalidate the cache using server information
// note we don't force files update. this will be done when the use opens it
server.Log(System.Diagnostics.TraceLevel.Warning, "UpdateCache id: " + id + " itemId: " + itemId + " parentId: " + parentId + " type: " + type + " oldName: " + oldName + " oldParentId: " + oldParentId);
WebApi.UpdateCache(itemId, parentId, type);
// tell the Shell that this pidl has changed
// which will eventually call back in views that may be opened to our folders
var item = server.GetItem(itemId);
if (item != null)
{
if (item.IsFolder)
{
switch (type)
{
case WatcherChangeTypes.Changed:
ShellUtilities.ChangeNotify(SHCNE.SHCNE_UPDATEDIR, 0, item.IdList);
break;
case WatcherChangeTypes.Created:
ShellUtilities.ChangeNotify(SHCNE.SHCNE_MKDIR, 0, item.IdList);
break;
case WatcherChangeTypes.Deleted:
ShellUtilities.ChangeNotify(SHCNE.SHCNE_RMDIR, 0, item.IdList);
break;
case WatcherChangeTypes.Renamed:
ShellUtilities.ChangeNotify(SHCNE.SHCNE_RENAMEFOLDER, 0, item.IdList);
break;
}
}
else
{
switch (type)
{
case WatcherChangeTypes.Changed:
ShellUtilities.ChangeNotify(SHCNE.SHCNE_UPDATEITEM, 0, item.IdList);
break;
case WatcherChangeTypes.Created:
ShellUtilities.ChangeNotify(SHCNE.SHCNE_CREATE, 0, item.IdList);
break;
case WatcherChangeTypes.Deleted:
ShellUtilities.ChangeNotify(SHCNE.SHCNE_DELETE, 0, item.IdList);
break;
case WatcherChangeTypes.Renamed:
ShellUtilities.ChangeNotify(SHCNE.SHCNE_RENAMEITEM, 0, item.IdList);
break;
}
}
}
item = server.GetItem(parentId);
if (item != null)
{
ShellUtilities.ChangeNotify(SHCNE.SHCNE_UPDATEDIR, 0, item.IdList);
}
});
_connection.StartAsync();
}
private void OnWatcherEvent(object sender, LocalFileSystemWatcherEventArgs e)
{
// basic checks
if (!IOUtilities.PathIsChildOrEqual(WebApi.LocalDirectory.FullName, e.Path))
{
return;
}
// skip some well known files (office, etc.)
if (!ConsiderForRemote(Path.GetFileName(e.Path)))
{
return;
}
var isDir = IOUtilities.PathIsDirectory(e.Path);
Server.Log(TraceLevel.Verbose, "Action:" + e.Action + " Get remote item for local: " + e.Path);
var item = Server.GetRemoteItem(e.Path);
if (item != null)
{
if (e.Action == WatcherChangeTypes.Deleted)
{
// a delete in a local file doesn't mean a delete in the server
ShellUtilities.ChangeNotify(SHCNE.SHCNE_UPDATEITEM, 0, item.IdList);
}
else if (e.Action == WatcherChangeTypes.Changed)
{
ShellUtilities.ChangeNotify(isDir ? SHCNE.SHCNE_UPDATEDIR : SHCNE.SHCNE_UPDATEITEM, 0, item.IdList);
if (!isDir)
{
SynchronizeFile(e.Path);
}
}
else if (e.Action == WatcherChangeTypes.Renamed)
{
ShellUtilities.ChangeNotify(isDir ? SHCNE.SHCNE_RENAMEFOLDER : SHCNE.SHCNE_RENAMEITEM, 0, item.IdList);
if (!isDir)
{
SynchronizeFile(e.Path);
}
}
// else create do nothing
}
else // try parent
{
var parentPath = Path.GetDirectoryName(e.Path);
item = Server.GetRemoteItem(parentPath);
if (item != null)
{
// new item creation in the local directories? could come from the "New ..." menu in virtual folder's context
// we don't use created just changed
if (e.Action != WatcherChangeTypes.Deleted && e.Action != WatcherChangeTypes.Created && item is IObjectWithApiItem owa)
{
var atts = IOUtilities.PathGetAttributes(e.Path);
if (atts.HasValue &&
!atts.Value.HasFlag(FileAttributes.Directory) &&
!atts.Value.HasFlag(FileAttributes.Hidden) &&
!atts.Value.HasFlag(FileAttributes.System))
{
WebApi.CreateAsync(owa.ApiItem.Id, e.Path, null, atts.Value);
}
}
ShellUtilities.ChangeNotify(SHCNE.SHCNE_UPDATEDIR, 0, item.IdList);
}
}
}
private void OnChangeNotifierNotify(object sender, ChangeNotifyEventArgs e)
{
// get our equivalent item
if (e.FileSystemPath1 != null)
{
// is it really about us?
if (e.FileSystemPath1.StartsWith(RootPath, StringComparison.OrdinalIgnoreCase))
{
// get relative path and normalize a bit
var relPath1 = IOUtilities.PathRemoveStartSlash(e.FileSystemPath1.Substring(RootPath.Length));
// build a PIDL corresponding to our namespace from a file system path (not in our namespace)
// and get/update the corresponding ShellItem from the cache, if it exists.
ShellItem item;
ShellItemIdList idl;
switch (e.Event)
{
case SHCNE.SHCNE_DELETE:
case SHCNE.SHCNE_RMDIR:
idl = ShellItemIdList.FromFileSystem(RootPhysical.IdList, relPath1, e.Event == SHCNE.SHCNE_RMDIR ? FileAttributes.Directory : FileAttributes.Normal);
item = Server.GetFromCache(idl);
if (item != null)
{
item.NotifyDelete();
Server.RemoveFromCache(item.IdList);
}
break;
case SHCNE.SHCNE_RENAMEFOLDER:
case SHCNE.SHCNE_RENAMEITEM:
idl = ShellItemIdList.FromFileSystem(RootPhysical.IdList, relPath1, e.Event == SHCNE.SHCNE_RENAMEFOLDER ? FileAttributes.Directory : FileAttributes.Normal);
item = Server.GetFromCache(idl);
if (item != null)
{
Server.RemoveFromCache(item.IdList);
}
// 1 is previous, 2 is new
var relPath2 = IOUtilities.PathRemoveStartSlash(e.FileSystemPath2.Substring(RootPath.Length));
var idl2 = ShellItemIdList.FromFileSystem(RootPhysical.IdList, relPath2, e.Event == SHCNE.SHCNE_RENAMEFOLDER ? FileAttributes.Directory : FileAttributes.Normal);
ShellUtilities.ChangeNotify(e.Event, 0, idl, idl2);
break;
case SHCNE.SHCNE_UPDATEITEM:
case SHCNE.SHCNE_UPDATEDIR:
idl = ShellItemIdList.FromFileSystem(RootPhysical.IdList, relPath1, e.Event == SHCNE.SHCNE_UPDATEDIR ? FileAttributes.Directory : FileAttributes.Normal);
item = Server.GetFromCache(idl);
if (item != null)
{
item.NotifyUpdate();
}
break;
case SHCNE.SHCNE_CREATE:
case SHCNE.SHCNE_MKDIR:
idl = ShellItemIdList.FromFileSystem(RootPhysical.IdList, relPath1, e.Event == SHCNE.SHCNE_MKDIR ? FileAttributes.Directory : FileAttributes.Normal);
item = Server.GetFromCache(idl);
if (item != null) // item should in general be null (creation)
{
item.NotifyCreate();
}
else
{
ShellUtilities.ChangeNotify(e.Event, 0, idl);
}
break;
}
}
}
}
