code.grnet.gr Git - pithos-ms-client/blob - trunk/Pithos.Client.WPF/Shell/ShellViewModel.cs

   1 using System.Collections.Concurrent;
   2 using System.ComponentModel;
   3 using System.ComponentModel.Composition;
   4 using System.Diagnostics;
   5 using System.Diagnostics.Contracts;
   6 using System.IO;
   7 using System.Net;
   8 using System.Reflection;
   9 using System.Runtime.InteropServices;
  10 using System.ServiceModel;
  11 using System.ServiceModel.Description;
  12 using System.Threading.Tasks;
  13 using System.Windows;
  14 using Caliburn.Micro;
  15 using Hardcodet.Wpf.TaskbarNotification;
  16 using Pithos.Client.WPF.Configuration;
  17 using Pithos.Client.WPF.FileProperties;
  18 using Pithos.Client.WPF.Properties;
  19 using Pithos.Client.WPF.SelectiveSynch;
  20 using Pithos.Client.WPF.Services;
  21 using Pithos.Client.WPF.Shell;
  22 using Pithos.Core;
  23 using Pithos.Interfaces;
  24 using System;
  25 using System.Collections.Generic;
  26 using System.Linq;
  27 using System.Text;
  28 using Pithos.Network;
  29 using StatusService = Pithos.Client.WPF.Services.StatusService;
  30
  31 namespace Pithos.Client.WPF {
  32         using System.ComponentModel.Composition;
  33
  34
  35         ///<summary>
  36         /// The "shell" of the Pithos application displays the taskbar  icon, menu and notifications.
  37         /// The shell also hosts the status service called by shell extensions to retrieve file info
  38         ///</summary>
  39         ///<remarks>
  40         /// It is a strange "shell" as its main visible element is an icon instead of a window
  41         /// The shell subscribes to the following events:
  42         /// * Notification:  Raised by components that want to notify the user. Usually displayed in a balloon
  43         /// * SelectiveSynchChanges: Notifies that the user made changes to the selective synch folders for an account. Raised by the Selective Synch dialog. Located here because the monitors are here
  44         /// * ShowFilePropertiesEvent: Raised when a shell command requests the display of the file/container properties dialog
  45         ///</remarks>
  46         //TODO: CODE SMELL Why does the shell handle the SelectiveSynchChanges?
  47         [Export(typeof(IShell))]
  48         public class ShellViewModel : Screen, IStatusNotification, IShell,
  49                 IHandle<Notification>, IHandle<SelectiveSynchChanges>, IHandle<ShowFilePropertiesEvent>
  50         {
  51                 //The Status Checker provides the current synch state
  52                 //TODO: Could we remove the status checker and use events in its place?
  53                 private IStatusChecker _statusChecker;
  54                 private IEventAggregator _events;
  55
  56                 public PithosSettings Settings { get; private set; }
  57
  58
  59         private ConcurrentDictionary<string, PithosMonitor> _monitors = new ConcurrentDictionary<string, PithosMonitor>();
  60                 ///<summary>
  61                 /// Dictionary of account monitors, keyed by account
  62                 ///</summary>
  63                 ///<remarks>
  64                 /// One monitor class is created for each account. The Shell needs access to the monitors to execute start/stop/pause commands,
  65                 /// retrieve account and boject info
  66                 ///</remarks>
  67                 // TODO: Does the Shell REALLY need access to the monitors? Could we achieve the same results with a better design?
  68                 // TODO: The monitors should be internal to Pithos.Core, even though exposing them makes coding of the Object and Container windows easier
  69         public ConcurrentDictionary<string, PithosMonitor> Monitors
  70                 {
  71                         get { return _monitors; }
  72                 }
  73
  74
  75                 ///<summary>
  76                 /// The status service is used by Shell extensions to retrieve file status information
  77                 ///</summary>
  78                 //TODO: CODE SMELL! This is the shell! While hosting in the shell makes executing start/stop commands easier, it is still a smell
  79                 private ServiceHost _statusService { get; set; }
  80
  81                 //Logging in the Pithos client is provided by log4net
  82                 private static readonly log4net.ILog Log = log4net.LogManager.GetLogger("Pithos");
  83
  84                 ///<summary>
  85                 /// The Shell depends on MEF to provide implementations for windowManager, events, the status checker service and the settings
  86                 ///</summary>
  87                 ///<remarks>
  88                 /// The PithosSettings class encapsulates the app's settings to abstract their storage mechanism (App settings, a database or registry)
  89                 ///</remarks>
  90                 [ImportingConstructor]
  91                 public ShellViewModel(IWindowManager windowManager, IEventAggregator events, IStatusChecker statusChecker, PithosSettings settings)
  92                 {
  93                         try
  94                         {
  95
  96                                 _windowManager = windowManager;
  97                                 //CHECK: Caliburn doesn't need explicit command construction
  98                                 //OpenPithosFolderCommand = new PithosCommand(OpenPithosFolder);
  99                                 _statusChecker = statusChecker;
 100                                 //The event subst
 101                                 _events = events;
 102                                 _events.Subscribe(this);
 103
 104                                 Settings = settings;
 105
 106                                 StatusMessage = "In Synch";
 107
 108                                 _accounts.CollectionChanged += (sender, e) =>
 109                                                                                                    {
 110                                                                                                            NotifyOfPropertyChange(() => OpenFolderCaption);
 111                                                                                                            NotifyOfPropertyChange(() => HasAccounts);
 112                                                                                                    };
 113
 114                         }
 115                         catch (Exception exc)
 116                         {
 117                                 Log.Error("Error while starting the ShellViewModel",exc);
 118                                 throw;
 119                         }
 120                 }
 121
 122
 123                 protected override void OnActivate()
 124                 {
 125                         base.OnActivate();
 126
 127                         StartMonitoring();
 128                 }
 129
 130
 131                 private async Task StartMonitoring()
 132                 {
 133                         try
 134                         {
 135                                 var accounts = Settings.Accounts.Select(MonitorAccount);
 136                                 await TaskEx.WhenAll(accounts);
 137                                 _statusService = StatusService.Start();
 138
 139 /*
 140                                 foreach (var account in Settings.Accounts)
 141                                 {
 142                                         await MonitorAccount(account);
 143                                 }
 144 */
 145
 146                         }
 147                         catch (AggregateException exc)
 148                         {
 149                                 exc.Handle(e =>
 150                                 {
 151                                         Log.Error("Error while starting monitoring", e);
 152                                         return true;
 153                                 });
 154                                 throw;
 155                         }
 156                 }
 157
 158                 protected override void OnDeactivate(bool close)
 159                 {
 160                         base.OnDeactivate(close);
 161                         if (close)
 162                         {
 163                                 StatusService.Stop(_statusService);
 164                                 _statusService = null;
 165                         }
 166                 }
 167
 168                 public Task MonitorAccount(AccountSettings account)
 169                 {
 170                         return Task.Factory.StartNew(() =>
 171                         {
 172                                 PithosMonitor monitor = null;
 173                                 var accountName = account.AccountName;
 174
 175                                 if (_monitors.TryGetValue(accountName, out monitor))
 176                                 {
 177                                         //If the account is active
 178                                         if (account.IsActive)
 179                                                 //Start the monitor. It's OK to start an already started monitor,
 180                                                 //it will just ignore the call
 181                                                 StartMonitor(monitor).Wait();
 182                                         else
 183                                         {
 184                                                 //If the account is inactive
 185                                                 //Stop and remove the monitor
 186                                                 RemoveMonitor(accountName);
 187                                         }
 188                                         return;
 189                                 }
 190
 191                                 //Create a new monitor/ Can't use MEF here, it would return a single instance for all monitors
 192                                 monitor = new PithosMonitor
 193                                                           {
 194                                                                   UserName = accountName,
 195                                                                   ApiKey = account.ApiKey,
 196                                                                   StatusNotification = this,
 197                                                                   RootPath = account.RootPath
 198                                                           };
 199                                 //PithosMonitor uses MEF so we need to resolve it
 200                                 IoC.BuildUp(monitor);
 201
 202                                 var appSettings = Properties.Settings.Default;
 203                                 monitor.AuthenticationUrl = account.ServerUrl;
 204
 205                                 _monitors[accountName] = monitor;
 206
 207                                 if (account.IsActive)
 208                                 {
 209                                         //Don't start a monitor if it doesn't have an account and ApiKey
 210                                         if (String.IsNullOrWhiteSpace(monitor.UserName) ||
 211                                                 String.IsNullOrWhiteSpace(monitor.ApiKey))
 212                                                 return;
 213                                         StartMonitor(monitor);
 214                                 }
 215                         });
 216                 }
 217
 218
 219                 protected override void OnViewLoaded(object view)
 220                 {
 221                         UpdateStatus();
 222                         var window = (Window)view;
 223                         TaskEx.Delay(1000).ContinueWith(t => Execute.OnUIThread(window.Hide));
 224                         base.OnViewLoaded(view);
 225                 }
 226
 227
 228                 #region Status Properties
 229
 230                 private string _statusMessage;
 231                 public string StatusMessage
 232                 {
 233                         get { return _statusMessage; }
 234                         set
 235                         {
 236                                 _statusMessage = value;
 237                                 NotifyOfPropertyChange(() => StatusMessage);
 238                         }
 239                 }
 240
 241                 private readonly ObservableConcurrentCollection<AccountInfo> _accounts = new ObservableConcurrentCollection<AccountInfo>();
 242                 public ObservableConcurrentCollection<AccountInfo> Accounts
 243                 {
 244                         get { return _accounts; }
 245                 }
 246
 247                 public bool HasAccounts
 248                 {
 249                         get { return _accounts.Count > 0; }
 250                 }
 251
 252
 253                 public string OpenFolderCaption
 254                 {
 255                         get
 256                         {
 257                                 return (_accounts.Count == 0)
 258                                                 ? "No Accounts Defined"
 259                                                 : "Open Pithos Folder";
 260                         }
 261                 }
 262
 263                 private string _pauseSyncCaption="Pause Synching";
 264                 public string PauseSyncCaption
 265                 {
 266                         get { return _pauseSyncCaption; }
 267                         set
 268                         {
 269                                 _pauseSyncCaption = value;
 270                                 NotifyOfPropertyChange(() => PauseSyncCaption);
 271                         }
 272                 }
 273
 274                 private readonly ObservableConcurrentCollection<FileEntry> _recentFiles = new ObservableConcurrentCollection<FileEntry>();
 275                 public ObservableConcurrentCollection<FileEntry> RecentFiles
 276                 {
 277                         get { return _recentFiles; }
 278                 }
 279
 280
 281                 private string _statusIcon="../Images/Pithos.ico";
 282                 public string StatusIcon
 283                 {
 284                         get { return _statusIcon; }
 285                         set
 286                         {
 287                                 //_statusIcon = value;
 288                                 NotifyOfPropertyChange(() => StatusIcon);
 289                         }
 290                 }
 291
 292                 #endregion
 293
 294                 #region Commands
 295
 296                 public void ShowPreferences()
 297                 {
 298                         Settings.Reload();
 299                         var preferences = new PreferencesViewModel(_windowManager,_events, this,Settings);
 300                         _windowManager.ShowDialog(preferences);
 301
 302                 }
 303
 304                 public void AboutPithos()
 305                 {
 306                         var about = new AboutViewModel();
 307                         _windowManager.ShowWindow(about);
 308                 }
 309
 310                 public void SendFeedback()
 311                 {
 312                         var feedBack =  IoC.Get<FeedbackViewModel>();
 313                         _windowManager.ShowWindow(feedBack);
 314                 }
 315
 316                 //public PithosCommand OpenPithosFolderCommand { get; private set; }
 317
 318                 public void OpenPithosFolder()
 319                 {
 320                         var account = Settings.Accounts.FirstOrDefault(acc => acc.IsActive);
 321                         if (account == null)
 322                                 return;
 323                         Process.Start(account.RootPath);
 324                 }
 325
 326                 public void OpenPithosFolder(AccountInfo account)
 327                 {
 328                         Process.Start(account.AccountPath);
 329                 }
 330
 331
 332 /*
 333                 public void GoToSite()
 334                 {
 335                         var site = Properties.Settings.Default.PithosSite;
 336                         Process.Start(site);
 337                 }
 338 */
 339
 340                 public void GoToSite(AccountInfo account)
 341                 {
 342                         /*var site = String.Format("{0}/ui/?token={1}&user={2}",
 343                                 account.SiteUri,account.Token,
 344                                 account.UserName);*/
 345                         Process.Start(account.SiteUri);
 346                 }
 347
 348                 public void ShowFileProperties()
 349                 {
 350                         var account = Settings.Accounts.First(acc => acc.IsActive);
 351                         var dir = new DirectoryInfo(account.RootPath + @"\pithos");
 352                         var files=dir.GetFiles();
 353                         var r=new Random();
 354                         var idx=r.Next(0, files.Length);
 355                         ShowFileProperties(files[idx].FullName);
 356                 }
 357
 358                 public void ShowFileProperties(string filePath)
 359                 {
 360                         if (String.IsNullOrWhiteSpace(filePath))
 361                                 throw new ArgumentNullException("filePath");
 362                         if (!File.Exists(filePath))
 363                                 throw new ArgumentException(String.Format("Non existent file {0}",filePath),"filePath");
 364                         Contract.EndContractBlock();
 365
 366                         var pair=(from monitor in  Monitors
 367                                                            where filePath.StartsWith(monitor.Value.RootPath, StringComparison.InvariantCultureIgnoreCase)
 368                                                                    select monitor).FirstOrDefault();
 369                         var account = pair.Key;
 370                         var accountMonitor = pair.Value;
 371
 372                         if (accountMonitor == null)
 373                                 return;
 374
 375                         var infoTask=Task.Factory.StartNew(()=>accountMonitor.GetObjectInfo(filePath));
 376
 377
 378
 379                         var fileProperties = new FilePropertiesViewModel(this, infoTask,filePath);
 380                         _windowManager.ShowWindow(fileProperties);
 381                 }
 382
 383                 public void ShowContainerProperties()
 384                 {
 385                         var account = Settings.Accounts.First(acc => acc.IsActive);
 386                         var dir = new DirectoryInfo(account.RootPath);
 387                         var fullName = (from folder in dir.EnumerateDirectories()
 388                                                         where (folder.Attributes & FileAttributes.Hidden) == 0
 389                                                         select folder.FullName).First();
 390                         ShowContainerProperties(fullName);
 391                 }
 392
 393                 public void ShowContainerProperties(string filePath)
 394                 {
 395                         if (String.IsNullOrWhiteSpace(filePath))
 396                                 throw new ArgumentNullException("filePath");
 397                         if (!Directory.Exists(filePath))
 398                                 throw new ArgumentException(String.Format("Non existent file {0}",filePath),"filePath");
 399                         Contract.EndContractBlock();
 400
 401                         var pair=(from monitor in  Monitors
 402                                                            where filePath.StartsWith(monitor.Value.RootPath, StringComparison.InvariantCultureIgnoreCase)
 403                                                                    select monitor).FirstOrDefault();
 404                         var account = pair.Key;
 405                         var accountMonitor = pair.Value;
 406                         var info = accountMonitor.GetContainerInfo(filePath);
 407
 408
 409
 410                         var containerProperties = new ContainerPropertiesViewModel(this, info,filePath);
 411                         _windowManager.ShowWindow(containerProperties);
 412                 }
 413
 414                 public ObjectInfo RefreshObjectInfo(ObjectInfo currentInfo)
 415                 {
 416                         if (currentInfo==null)
 417                                 throw new ArgumentNullException("currentInfo");
 418                         Contract.EndContractBlock();
 419
 420                         var monitor = Monitors[currentInfo.Account];
 421                         var newInfo=monitor.CloudClient.GetObjectInfo(currentInfo.Account, currentInfo.Container, currentInfo.Name);
 422                         return newInfo;
 423                 }
 424
 425                 public ContainerInfo RefreshContainerInfo(ContainerInfo container)
 426                 {
 427                         if (container == null)
 428                                 throw new ArgumentNullException("container");
 429                         Contract.EndContractBlock();
 430
 431                         var monitor = Monitors[container.Account];
 432                         var newInfo = monitor.CloudClient.GetContainerInfo(container.Account, container.Name);
 433                         return newInfo;
 434                 }
 435
 436
 437                 public void ToggleSynching()
 438                 {
 439                         bool isPaused=false;
 440                         foreach (var pair in Monitors)
 441                         {
 442                                 var monitor = pair.Value;
 443                                 monitor.Pause = !monitor.Pause;
 444                                 isPaused = monitor.Pause;
 445                         }
 446
 447                         PauseSyncCaption = isPaused ? "Resume syncing" : "Pause syncing";
 448                         var iconKey = isPaused? "TraySyncPaused" : "TrayInSynch";
 449                         StatusIcon = String.Format(@"../Images/{0}.ico", iconKey);
 450                 }
 451
 452                 public void ExitPithos()
 453                 {
 454                         foreach (var pair in Monitors)
 455                         {
 456                                 var monitor = pair.Value;
 457                                 monitor.Stop();
 458                         }
 459
 460                         ((Window)GetView()).Close();
 461                 }
 462                 #endregion
 463
 464
 465                 private Dictionary<PithosStatus, StatusInfo> iconNames = new List<StatusInfo>
 466                         {
 467                                 new StatusInfo(PithosStatus.InSynch, "All files up to date", "TrayInSynch"),
 468                                 new StatusInfo(PithosStatus.Syncing, "Syncing Files", "TraySynching"),
 469                                 new StatusInfo(PithosStatus.SyncPaused, "Sync Paused", "TraySyncPaused")
 470                         }.ToDictionary(s => s.Status);
 471
 472                 readonly IWindowManager _windowManager;
 473
 474
 475                 ///<summary>
 476                 /// Updates the visual status indicators of the application depending on status changes, e.g. icon, stat
 477                 ///</summary>
 478                 public void UpdateStatus()
 479                 {
 480                         var pithosStatus = _statusChecker.GetPithosStatus();
 481
 482                         if (iconNames.ContainsKey(pithosStatus))
 483                         {
 484                                 var info = iconNames[pithosStatus];
 485                                 StatusIcon = String.Format(@"../Images/{0}.ico", info.IconName);
 486
 487                                 Assembly assembly = Assembly.GetExecutingAssembly();
 488                                 var fileVersion = FileVersionInfo.GetVersionInfo(assembly.Location);
 489
 490
 491                                 StatusMessage = String.Format("Pithos {0}\r\n{1}", fileVersion.FileVersion,info.StatusText);
 492                         }
 493
 494                         _events.Publish(new Notification { Title = "Start", Message = "Start Monitoring", Level = TraceLevel.Info});
 495                 }
 496
 497
 498
 499                 private Task StartMonitor(PithosMonitor monitor,int retries=0)
 500                 {
 501                         return Task.Factory.StartNew(() =>
 502                         {
 503                                 using (log4net.ThreadContext.Stacks["Monitor"].Push("Start"))
 504                                 {
 505                                         try
 506                                         {
 507                                                 Log.InfoFormat("Start Monitoring {0}", monitor.UserName);
 508
 509                                                 monitor.Start();
 510                                         }
 511                                         catch (WebException exc)
 512                                         {
 513                                                 if (AbandonRetry(monitor, retries))
 514                                                         return;
 515
 516                                                 if (IsUnauthorized(exc))
 517                                                 {
 518                                                         var message = String.Format("API Key Expired for {0}. Starting Renewal",monitor.UserName);
 519                                                         Log.Error(message,exc);
 520                                                         TryAuthorize(monitor,retries).Wait();
 521                                                 }
 522                                                 else
 523                                                 {
 524                                                         TryLater(monitor, exc,retries);
 525                                                 }
 526                                         }
 527                                         catch (Exception exc)
 528                                         {
 529                                                 if (AbandonRetry(monitor, retries))
 530                                                         return;
 531
 532                                                 TryLater(monitor,exc,retries);
 533                                         }
 534                                 }
 535                         });
 536                 }
 537
 538                 private bool AbandonRetry(PithosMonitor monitor, int retries)
 539                 {
 540                         if (retries > 1)
 541                         {
 542                                 var message = String.Format("Monitoring of account {0} has failed too many times. Will not retry",
 543                                                                                         monitor.UserName);
 544                                 _events.Publish(new Notification
 545                                                                         {Title = "Account monitoring failed", Message = message, Level = TraceLevel.Error});
 546                                 return true;
 547                         }
 548                         return false;
 549                 }
 550
 551
 552                 private async Task TryAuthorize(PithosMonitor monitor,int retries)
 553                 {
 554                         _events.Publish(new Notification { Title = "Authorization failed", Message = "Your API Key has probably expired. You will be directed to a page where you can renew it", Level = TraceLevel.Error });
 555
 556                         try
 557                         {
 558
 559                                 var credentials = await PithosAccount.RetrieveCredentials(Settings.PithosLoginUrl);
 560
 561                                 var account = Settings.Accounts.FirstOrDefault(act => act.AccountName == credentials.UserName);
 562                                 account.ApiKey = credentials.Password;
 563                                 monitor.ApiKey = credentials.Password;
 564                                 Settings.Save();
 565                                 await TaskEx.Delay(10000);
 566                                 StartMonitor(monitor, retries + 1);
 567                                 NotifyOfPropertyChange(()=>Accounts);
 568                         }
 569                         catch (AggregateException exc)
 570                         {
 571                                 string message = String.Format("API Key retrieval for {0} failed", monitor.UserName);
 572                                 Log.Error(message, exc.InnerException);
 573                                 _events.Publish(new Notification { Title = "Authorization failed", Message = message, Level = TraceLevel.Error });
 574                                 return;
 575                         }
 576                         catch (Exception exc)
 577                         {
 578                                 string message = String.Format("API Key retrieval for {0} failed", monitor.UserName);
 579                                 Log.Error(message, exc);
 580                                 _events.Publish(new Notification { Title = "Authorization failed", Message = message, Level = TraceLevel.Error });
 581                                 return;
 582
 583                         }
 584
 585                 }
 586
 587                 private static bool IsUnauthorized(WebException exc)
 588                 {
 589                         if (exc==null)
 590                                 throw new ArgumentNullException("exc");
 591                         Contract.EndContractBlock();
 592
 593                         var response = exc.Response as HttpWebResponse;
 594                         if (response == null)
 595                                 return false;
 596                         return (response.StatusCode == HttpStatusCode.Unauthorized);
 597                 }
 598
 599                 private void TryLater(PithosMonitor monitor, Exception exc,int retries)
 600                 {
 601                         var message = String.Format("An exception occured. Can't start monitoring\nWill retry in 10 seconds");
 602                         Task.Factory.StartNewDelayed(10000, () => StartMonitor(monitor,retries+1));
 603                         _events.Publish(new Notification
 604                                                                 {Title = "Error", Message = message, Level = TraceLevel.Error});
 605                         Log.Error(message, exc);
 606                 }
 607
 608
 609                 public void NotifyChange(string status, TraceLevel level=TraceLevel.Info)
 610                 {
 611                         this.StatusMessage = status;
 612
 613                         _events.Publish(new Notification { Title = "Pithos", Message = status, Level = level });
 614                 }
 615
 616                 public void NotifyChangedFile(string filePath)
 617                 {
 618                         var entry = new FileEntry {FullPath=filePath};
 619                         IProducerConsumerCollection<FileEntry> files=this.RecentFiles;
 620                         FileEntry popped;
 621                         while (files.Count > 5)
 622                                 files.TryTake(out popped);
 623                         files.TryAdd(entry);
 624                 }
 625
 626                 public void NotifyAccount(AccountInfo account)
 627                 {
 628                         if (account== null)
 629                                 return;
 630                         //TODO: What happens to an existing account whose Token has changed?
 631                         account.SiteUri= String.Format("{0}/ui/?token={1}&user={2}",
 632                                 account.SiteUri, account.Token,
 633                                 account.UserName);
 634
 635                         if (Accounts.All(item => item.UserName != account.UserName))
 636                                 Accounts.TryAdd(account);
 637
 638                 }
 639
 640
 641                 public void RemoveMonitor(string accountName)
 642                 {
 643                         if (String.IsNullOrWhiteSpace(accountName))
 644                                 return;
 645
 646                         var accountInfo=_accounts.FirstOrDefault(account => account.UserName == accountName);
 647                         _accounts.TryRemove(accountInfo);
 648
 649                         PithosMonitor monitor;
 650                         if (Monitors.TryRemove(accountName, out monitor))
 651                         {
 652                                 monitor.Stop();
 653                         }
 654                 }
 655
 656                 public void RefreshOverlays()
 657                 {
 658                         foreach (var pair in Monitors)
 659                         {
 660                                 var monitor = pair.Value;
 661
 662                                 var path = monitor.RootPath;
 663
 664                                 if (String.IsNullOrWhiteSpace(path))
 665                                         continue;
 666
 667                                 if (!Directory.Exists(path) && !File.Exists(path))
 668                                         continue;
 669
 670                                 IntPtr pathPointer = Marshal.StringToCoTaskMemAuto(path);
 671
 672                                 try
 673                                 {
 674                                         NativeMethods.SHChangeNotify(HChangeNotifyEventID.SHCNE_UPDATEITEM,
 675                                                                                                  HChangeNotifyFlags.SHCNF_PATHW | HChangeNotifyFlags.SHCNF_FLUSHNOWAIT,
 676                                                                                                  pathPointer, IntPtr.Zero);
 677                                 }
 678                                 finally
 679                                 {
 680                                         Marshal.FreeHGlobal(pathPointer);
 681                                 }
 682                         }
 683                 }
 684
 685                 #region Event Handlers
 686
 687                 public void Handle(SelectiveSynchChanges message)
 688                 {
 689                         var accountName = message.Account.AccountName;
 690                         PithosMonitor monitor;
 691                         if (_monitors.TryGetValue(accountName, out monitor))
 692                         {
 693                                 monitor.AddSelectivePaths(message.Added);
 694                                 monitor.RemoveSelectivePaths(message.Removed);
 695
 696                         }
 697
 698                 }
 699
 700
 701                 public void Handle(Notification notification)
 702                 {
 703                         if (!Settings.ShowDesktopNotifications)
 704                                 return;
 705                         BalloonIcon icon = BalloonIcon.None;
 706                         switch (notification.Level)
 707                         {
 708                                 case TraceLevel.Error:
 709                                         icon = BalloonIcon.Error;
 710                                         break;
 711                                 case TraceLevel.Info:
 712                                 case TraceLevel.Verbose:
 713                                         icon = BalloonIcon.Info;
 714                                         break;
 715                                 case TraceLevel.Warning:
 716                                         icon = BalloonIcon.Warning;
 717                                         break;
 718                                 default:
 719                                         icon = BalloonIcon.None;
 720                                         break;
 721                         }
 722
 723                         if (Settings.ShowDesktopNotifications)
 724                         {
 725                                 var tv = (ShellView) this.GetView();
 726                                 tv.TaskbarView.ShowBalloonTip(notification.Title, notification.Message, icon);
 727                         }
 728                 }
 729                 #endregion
 730
 731                 public void Handle(ShowFilePropertiesEvent message)
 732                 {
 733                         if (message == null)
 734                                 throw new ArgumentNullException("message");
 735                         if (String.IsNullOrWhiteSpace(message.FileName) )
 736                                 throw new ArgumentException("message");
 737                         Contract.EndContractBlock();
 738
 739                         var fileName = message.FileName;
 740
 741                         if (File.Exists(fileName))
 742                                 this.ShowFileProperties(fileName);
 743                         else if (Directory.Exists(fileName))
 744                                 this.ShowContainerProperties(fileName);
 745                 }
 746         }
 747 }