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();
}
