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

   1 using System.Collections.Concurrent;
   2 using System.Diagnostics;
   3 using System.Diagnostics.Contracts;
   4 using System.IO;
   5 using System.Net;
   6 using System.Reflection;
   7 using System.Runtime.InteropServices;
   8 using System.ServiceModel;
   9 using System.Threading.Tasks;
  10 using System.Windows;
  11 using Caliburn.Micro;
  12 using Hardcodet.Wpf.TaskbarNotification;
  13 using Pithos.Client.WPF.Configuration;
  14 using Pithos.Client.WPF.FileProperties;
  15 using Pithos.Client.WPF.SelectiveSynch;
  16 using Pithos.Client.WPF.Services;
  17 using Pithos.Client.WPF.Shell;
  18 using Pithos.Core;
  19 using Pithos.Interfaces;
  20 using System;
  21 using System.Collections.Generic;
  22 using System.Linq;
  23 using Pithos.Network;
  24 using StatusService = Pithos.Client.WPF.Services.StatusService;
  25
  26 namespace Pithos.Client.WPF {
  27         using System.ComponentModel.Composition;
  28
  29
  30         ///<summary>
  31         /// The "shell" of the Pithos application displays the taskbar  icon, menu and notifications.
  32         /// The shell also hosts the status service called by shell extensions to retrieve file info
  33         ///</summary>
  34         ///<remarks>
  35         /// It is a strange "shell" as its main visible element is an icon instead of a window
  36         /// The shell subscribes to the following events:
  37         /// * Notification:  Raised by components that want to notify the user. Usually displayed in a balloon
  38         /// * 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
  39         /// * ShowFilePropertiesEvent: Raised when a shell command requests the display of the file/container properties dialog
  40         ///</remarks>
  41         //TODO: CODE SMELL Why does the shell handle the SelectiveSynchChanges?
  42         [Export(typeof(IShell))]
  43         public class ShellViewModel : Screen, IStatusNotification, IShell,
  44                 IHandle<Notification>, IHandle<SelectiveSynchChanges>, IHandle<ShowFilePropertiesEvent>
  45         {
  46                 //The Status Checker provides the current synch state
  47                 //TODO: Could we remove the status checker and use events in its place?
  48                 private readonly IStatusChecker _statusChecker;
  49                 private readonly IEventAggregator _events;
  50
  51                 public PithosSettings Settings { get; private set; }
  52
  53
  54         private readonly ConcurrentDictionary<string, PithosMonitor> _monitors = new ConcurrentDictionary<string, PithosMonitor>();
  55                 ///<summary>
  56                 /// Dictionary of account monitors, keyed by account
  57                 ///</summary>
  58                 ///<remarks>
  59                 /// One monitor class is created for each account. The Shell needs access to the monitors to execute start/stop/pause commands,
  60                 /// retrieve account and boject info
  61                 ///</remarks>
  62                 // TODO: Does the Shell REALLY need access to the monitors? Could we achieve the same results with a better design?
  63                 // TODO: The monitors should be internal to Pithos.Core, even though exposing them makes coding of the Object and Container windows easier
  64         public ConcurrentDictionary<string, PithosMonitor> Monitors
  65                 {
  66                         get { return _monitors; }
  67                 }
  68
  69
  70             ///<summary>
  71             /// The status service is used by Shell extensions to retrieve file status information
  72             ///</summary>
  73             //TODO: CODE SMELL! This is the shell! While hosting in the shell makes executing start/stop commands easier, it is still a smell
  74             private ServiceHost _statusService;
  75
  76                 //Logging in the Pithos client is provided by log4net
  77                 private static readonly log4net.ILog Log = log4net.LogManager.GetLogger("Pithos");
  78
  79                 ///<summary>
  80                 /// The Shell depends on MEF to provide implementations for windowManager, events, the status checker service and the settings
  81                 ///</summary>
  82                 ///<remarks>
  83                 /// The PithosSettings class encapsulates the app's settings to abstract their storage mechanism (App settings, a database or registry)
  84                 ///</remarks>
  85                 [ImportingConstructor]
  86                 public ShellViewModel(IWindowManager windowManager, IEventAggregator events, IStatusChecker statusChecker, PithosSettings settings)
  87                 {
  88                         try
  89                         {
  90
  91                                 _windowManager = windowManager;
  92                                 //CHECK: Caliburn doesn't need explicit command construction
  93                                 //OpenPithosFolderCommand = new PithosCommand(OpenPithosFolder);
  94                                 _statusChecker = statusChecker;
  95                                 //The event subst
  96                                 _events = events;
  97                                 _events.Subscribe(this);
  98
  99                                 Settings = settings;
 100
 101                                 StatusMessage = "In Synch";
 102
 103                                 _accounts.CollectionChanged += (sender, e) =>
 104                                                                                                    {
 105                                                                                                            NotifyOfPropertyChange(() => OpenFolderCaption);
 106                                                                                                            NotifyOfPropertyChange(() => HasAccounts);
 107                                                                                                    };
 108
 109                         }
 110                         catch (Exception exc)
 111                         {
 112                                 Log.Error("Error while starting the ShellViewModel",exc);
 113                                 throw;
 114                         }
 115                 }
 116
 117
 118                 protected override void OnActivate()
 119                 {
 120                         base.OnActivate();
 121
 122                         StartMonitoring();
 123                 }
 124
 125
 126                 private async void StartMonitoring()
 127                 {
 128                         try
 129                         {
 130                                 var accounts = Settings.Accounts.Select(MonitorAccount);
 131                                 await TaskEx.WhenAll(accounts);
 132                                 _statusService = StatusService.Start();
 133
 134 /*
 135                                 foreach (var account in Settings.Accounts)
 136                                 {
 137                                         await MonitorAccount(account);
 138                                 }
 139 */
 140
 141                         }
 142                         catch (AggregateException exc)
 143                         {
 144                                 exc.Handle(e =>
 145                                 {
 146                                         Log.Error("Error while starting monitoring", e);
 147                                         return true;
 148                                 });
 149                                 throw;
 150                         }
 151                 }
 152
 153                 protected override void OnDeactivate(bool close)
 154                 {
 155                         base.OnDeactivate(close);
 156                         if (close)
 157                         {
 158                                 StatusService.Stop(_statusService);
 159                                 _statusService = null;
 160                         }
 161                 }
 162
 163                 public Task MonitorAccount(AccountSettings account)
 164                 {
 165                         return Task.Factory.StartNew(() =>
 166                         {
 167                                 PithosMonitor monitor;
 168                                 var accountName = account.AccountName;
 169
 170                                 if (_monitors.TryGetValue(accountName, out monitor))
 171                                 {
 172                                         //If the account is active
 173                                         if (account.IsActive)
 174                                                 //Start the monitor. It's OK to start an already started monitor,
 175                                                 //it will just ignore the call
 176                                                 StartMonitor(monitor).Wait();
 177                                         else
 178                                         {
 179                                                 //If the account is inactive
 180                                                 //Stop and remove the monitor
 181                                                 RemoveMonitor(accountName);
 182                                         }
 183                                         return;
 184                                 }
 185
 186                                 //Create a new monitor/ Can't use MEF here, it would return a single instance for all monitors
 187                                 monitor = new PithosMonitor
 188                                                           {
 189                                                                   UserName = accountName,
 190                                                                   ApiKey = account.ApiKey,
 191                                                                   StatusNotification = this,
 192                                                                   RootPath = account.RootPath
 193                                                           };
 194                                 //PithosMonitor uses MEF so we need to resolve it
 195                                 IoC.BuildUp(monitor);
 196
 197                             monitor.AuthenticationUrl = account.ServerUrl;
 198
 199                                 _monitors[accountName] = monitor;
 200
 201                                 if (account.IsActive)
 202                                 {
 203                                         //Don't start a monitor if it doesn't have an account and ApiKey
 204                                         if (String.IsNullOrWhiteSpace(monitor.UserName) ||
 205                                                 String.IsNullOrWhiteSpace(monitor.ApiKey))
 206                                                 return;
 207                                         StartMonitor(monitor);
 208                                 }
 209                         });
 210                 }
 211
 212
 213                 protected override void OnViewLoaded(object view)
 214                 {
 215                         UpdateStatus();
 216                         var window = (Window)view;
 217                         TaskEx.Delay(1000).ContinueWith(t => Execute.OnUIThread(window.Hide));
 218                         base.OnViewLoaded(view);
 219                 }
 220
 221
 222                 #region Status Properties
 223
 224                 private string _statusMessage;
 225                 public string StatusMessage
 226                 {
 227                         get { return _statusMessage; }
 228                         set
 229                         {
 230                                 _statusMessage = value;
 231                                 NotifyOfPropertyChange(() => StatusMessage);
 232                         }
 233                 }
 234
 235                 private readonly ObservableConcurrentCollection<AccountInfo> _accounts = new ObservableConcurrentCollection<AccountInfo>();
 236                 public ObservableConcurrentCollection<AccountInfo> Accounts
 237                 {
 238                         get { return _accounts; }
 239                 }
 240
 241                 public bool HasAccounts
 242                 {
 243                         get { return _accounts.Count > 0; }
 244                 }
 245
 246
 247                 public string OpenFolderCaption
 248                 {
 249                         get
 250                         {
 251                                 return (_accounts.Count == 0)
 252                                                 ? "No Accounts Defined"
 253                                                 : "Open Pithos Folder";
 254                         }
 255                 }
 256
 257                 private string _pauseSyncCaption="Pause Synching";
 258                 public string PauseSyncCaption
 259                 {
 260                         get { return _pauseSyncCaption; }
 261                         set
 262                         {
 263                                 _pauseSyncCaption = value;
 264                                 NotifyOfPropertyChange(() => PauseSyncCaption);
 265                         }
 266                 }
 267
 268                 private readonly ObservableConcurrentCollection<FileEntry> _recentFiles = new ObservableConcurrentCollection<FileEntry>();
 269                 public ObservableConcurrentCollection<FileEntry> RecentFiles
 270                 {
 271                         get { return _recentFiles; }
 272                 }
 273
 274
 275                 private string _statusIcon="../Images/Pithos.ico";
 276                 public string StatusIcon
 277                 {
 278                         get { return _statusIcon; }
 279                         set
 280                         {
 281                 //TODO: Ensure all status icons use the Pithos logo
 282                                 _statusIcon = value;
 283                                 NotifyOfPropertyChange(() => StatusIcon);
 284                         }
 285                 }
 286
 287                 #endregion
 288
 289                 #region Commands
 290
 291                 public void ShowPreferences()
 292                 {
 293                         Settings.Reload();
 294                         var preferences = new PreferencesViewModel(_windowManager,_events, this,Settings);
 295                         _windowManager.ShowDialog(preferences);
 296
 297                 }
 298
 299                 public void AboutPithos()
 300                 {
 301                         var about = new AboutViewModel();
 302                         _windowManager.ShowWindow(about);
 303                 }
 304
 305                 public void SendFeedback()
 306                 {
 307                         var feedBack =  IoC.Get<FeedbackViewModel>();
 308                         _windowManager.ShowWindow(feedBack);
 309                 }
 310
 311                 //public PithosCommand OpenPithosFolderCommand { get; private set; }
 312
 313                 public void OpenPithosFolder()
 314                 {
 315                         var account = Settings.Accounts.FirstOrDefault(acc => acc.IsActive);
 316                         if (account == null)
 317                                 return;
 318                         Process.Start(account.RootPath);
 319                 }
 320
 321                 public void OpenPithosFolder(AccountInfo account)
 322                 {
 323                         Process.Start(account.AccountPath);
 324                 }
 325
 326
 327 /*
 328                 public void GoToSite()
 329                 {
 330                         var site = Properties.Settings.Default.PithosSite;
 331                         Process.Start(site);
 332                 }
 333 */
 334
 335                 public void GoToSite(AccountInfo account)
 336                 {
 337                         /*var site = String.Format("{0}/ui/?token={1}&user={2}",
 338                                 account.SiteUri,account.Token,
 339                                 account.UserName);*/
 340                         Process.Start(account.SiteUri);
 341                 }
 342
 343                 public void ShowFileProperties()
 344                 {
 345                         var account = Settings.Accounts.First(acc => acc.IsActive);
 346                         var dir = new DirectoryInfo(account.RootPath + @"\pithos");
 347                         var files=dir.GetFiles();
 348                         var r=new Random();
 349                         var idx=r.Next(0, files.Length);
 350                         ShowFileProperties(files[idx].FullName);
 351                 }
 352
 353                 public void ShowFileProperties(string filePath)
 354                 {
 355                         if (String.IsNullOrWhiteSpace(filePath))
 356                                 throw new ArgumentNullException("filePath");
 357                         if (!File.Exists(filePath) && !Directory.Exists(filePath))
 358                                 throw new ArgumentException(String.Format("Non existent file {0}",filePath),"filePath");
 359                         Contract.EndContractBlock();
 360
 361                         var pair=(from monitor in  Monitors
 362                                                            where filePath.StartsWith(monitor.Value.RootPath, StringComparison.InvariantCultureIgnoreCase)
 363                                                                    select monitor).FirstOrDefault();
 364                     var accountMonitor = pair.Value;
 365
 366                         if (accountMonitor == null)
 367                                 return;
 368
 369                         var infoTask=Task.Factory.StartNew(()=>accountMonitor.GetObjectInfo(filePath));
 370
 371
 372
 373                         var fileProperties = new FilePropertiesViewModel(this, infoTask,filePath);
 374                         _windowManager.ShowWindow(fileProperties);
 375                 }
 376
 377                 public void ShowContainerProperties()
 378                 {
 379                         var account = Settings.Accounts.First(acc => acc.IsActive);
 380                         var dir = new DirectoryInfo(account.RootPath);
 381                         var fullName = (from folder in dir.EnumerateDirectories()
 382                                                         where (folder.Attributes & FileAttributes.Hidden) == 0
 383                                                         select folder.FullName).First();
 384                         ShowContainerProperties(fullName);
 385                 }
 386
 387                 public void ShowContainerProperties(string filePath)
 388                 {
 389                         if (String.IsNullOrWhiteSpace(filePath))
 390                                 throw new ArgumentNullException("filePath");
 391                         if (!Directory.Exists(filePath))
 392                                 throw new ArgumentException(String.Format("Non existent file {0}",filePath),"filePath");
 393                         Contract.EndContractBlock();
 394
 395                         var pair=(from monitor in  Monitors
 396                                                            where filePath.StartsWith(monitor.Value.RootPath, StringComparison.InvariantCultureIgnoreCase)
 397                                                                    select monitor).FirstOrDefault();
 398                     var accountMonitor = pair.Value;
 399                         var info = accountMonitor.GetContainerInfo(filePath);
 400
 401
 402
 403                         var containerProperties = new ContainerPropertiesViewModel(this, info,filePath);
 404                         _windowManager.ShowWindow(containerProperties);
 405                 }
 406
 407         public void SynchNow()
 408         {}
 409
 410                 public ObjectInfo RefreshObjectInfo(ObjectInfo currentInfo)
 411                 {
 412                         if (currentInfo==null)
 413                                 throw new ArgumentNullException("currentInfo");
 414                         Contract.EndContractBlock();
 415
 416                         var monitor = Monitors[currentInfo.Account];
 417                         var newInfo=monitor.CloudClient.GetObjectInfo(currentInfo.Account, currentInfo.Container, currentInfo.Name);
 418                         return newInfo;
 419                 }
 420
 421                 public ContainerInfo RefreshContainerInfo(ContainerInfo container)
 422                 {
 423                         if (container == null)
 424                                 throw new ArgumentNullException("container");
 425                         Contract.EndContractBlock();
 426
 427                         var monitor = Monitors[container.Account];
 428                         var newInfo = monitor.CloudClient.GetContainerInfo(container.Account, container.Name);
 429                         return newInfo;
 430                 }
 431
 432
 433                 public void ToggleSynching()
 434                 {
 435                         bool isPaused=false;
 436                         foreach (var pair in Monitors)
 437                         {
 438                                 var monitor = pair.Value;
 439                                 monitor.Pause = !monitor.Pause;
 440                                 isPaused = monitor.Pause;
 441                         }
 442
 443                         PauseSyncCaption = isPaused ? "Resume syncing" : "Pause syncing";
 444                         var iconKey = isPaused? "TraySyncPaused" : "TrayInSynch";
 445                         StatusIcon = String.Format(@"../Images/{0}.ico", iconKey);
 446                 }
 447
 448                 public void ExitPithos()
 449                 {
 450                         foreach (var pair in Monitors)
 451                         {
 452                                 var monitor = pair.Value;
 453                                 monitor.Stop();
 454                         }
 455
 456                         ((Window)GetView()).Close();
 457                 }
 458                 #endregion
 459
 460
 461                 private readonly Dictionary<PithosStatus, StatusInfo> _iconNames = new List<StatusInfo>
 462                         {
 463                                 new StatusInfo(PithosStatus.InSynch, "All files up to date", "TrayInSynch"),
 464                                 new StatusInfo(PithosStatus.Syncing, "Syncing Files", "TraySynching"),
 465                                 new StatusInfo(PithosStatus.SyncPaused, "Sync Paused", "TraySyncPaused")
 466                         }.ToDictionary(s => s.Status);
 467
 468                 readonly IWindowManager _windowManager;
 469
 470
 471                 ///<summary>
 472                 /// Updates the visual status indicators of the application depending on status changes, e.g. icon, stat
 473                 ///</summary>
 474                 public void UpdateStatus()
 475                 {
 476                         var pithosStatus = _statusChecker.GetPithosStatus();
 477
 478                         if (_iconNames.ContainsKey(pithosStatus))
 479                         {
 480                                 var info = _iconNames[pithosStatus];
 481                                 StatusIcon = String.Format(@"../Images/{0}.ico", info.IconName);
 482
 483                                 Assembly assembly = Assembly.GetExecutingAssembly();
 484                                 var fileVersion = FileVersionInfo.GetVersionInfo(assembly.Location);
 485
 486
 487                                 StatusMessage = String.Format("Pithos {0}\r\n{1}", fileVersion.FileVersion,info.StatusText);
 488                         }
 489
 490                         _events.Publish(new Notification { Title = "Start", Message = "Start Monitoring", Level = TraceLevel.Info});
 491                 }
 492
 493
 494
 495                 private Task StartMonitor(PithosMonitor monitor,int retries=0)
 496                 {
 497                         return Task.Factory.StartNew(() =>
 498                         {
 499                                 using (log4net.ThreadContext.Stacks["Monitor"].Push("Start"))
 500                                 {
 501                                         try
 502                                         {
 503                                                 Log.InfoFormat("Start Monitoring {0}", monitor.UserName);
 504
 505                                                 monitor.Start();
 506                                         }
 507                                         catch (WebException exc)
 508                                         {
 509                                                 if (AbandonRetry(monitor, retries))
 510                                                         return;
 511
 512                                                 if (IsUnauthorized(exc))
 513                                                 {
 514                                                         var message = String.Format("API Key Expired for {0}. Starting Renewal",monitor.UserName);
 515                                                         Log.Error(message,exc);
 516                                                         TryAuthorize(monitor,retries).Wait();
 517                                                 }
 518                                                 else
 519                                                 {
 520                                                         TryLater(monitor, exc,retries);
 521                                                 }
 522                                         }
 523                                         catch (Exception exc)
 524                                         {
 525                                                 if (AbandonRetry(monitor, retries))
 526                                                         return;
 527
 528                                                 TryLater(monitor,exc,retries);
 529                                         }
 530                                 }
 531                         });
 532                 }
 533
 534                 private bool AbandonRetry(PithosMonitor monitor, int retries)
 535                 {
 536                         if (retries > 1)
 537                         {
 538                                 var message = String.Format("Monitoring of account {0} has failed too many times. Will not retry",
 539                                                                                         monitor.UserName);
 540                                 _events.Publish(new Notification
 541                                                                         {Title = "Account monitoring failed", Message = message, Level = TraceLevel.Error});
 542                                 return true;
 543                         }
 544                         return false;
 545                 }
 546
 547
 548                 private async Task TryAuthorize(PithosMonitor monitor,int retries)
 549                 {
 550                         _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 });
 551
 552                         try
 553                         {
 554
 555                                 var credentials = await PithosAccount.RetrieveCredentials(Settings.PithosLoginUrl);
 556
 557                                 var account = Settings.Accounts.First(act => act.AccountName == credentials.UserName);
 558                                 account.ApiKey = credentials.Password;
 559                                 monitor.ApiKey = credentials.Password;
 560                                 Settings.Save();
 561                                 await TaskEx.Delay(10000);
 562                                 StartMonitor(monitor, retries + 1);
 563                                 NotifyOfPropertyChange(()=>Accounts);
 564                         }
 565                         catch (AggregateException exc)
 566                         {
 567                                 string message = String.Format("API Key retrieval for {0} failed", monitor.UserName);
 568                                 Log.Error(message, exc.InnerException);
 569                                 _events.Publish(new Notification { Title = "Authorization failed", Message = message, Level = TraceLevel.Error });
 570                         }
 571                         catch (Exception exc)
 572                         {
 573                                 string message = String.Format("API Key retrieval for {0} failed", monitor.UserName);
 574                                 Log.Error(message, exc);
 575                                 _events.Publish(new Notification { Title = "Authorization failed", Message = message, Level = TraceLevel.Error });
 576                         }
 577
 578                 }
 579
 580                 private static bool IsUnauthorized(WebException exc)
 581                 {
 582                         if (exc==null)
 583                                 throw new ArgumentNullException("exc");
 584                         Contract.EndContractBlock();
 585
 586                         var response = exc.Response as HttpWebResponse;
 587                         if (response == null)
 588                                 return false;
 589                         return (response.StatusCode == HttpStatusCode.Unauthorized);
 590                 }
 591
 592                 private void TryLater(PithosMonitor monitor, Exception exc,int retries)
 593                 {
 594                         var message = String.Format("An exception occured. Can't start monitoring\nWill retry in 10 seconds");
 595                         Task.Factory.StartNewDelayed(10000, () => StartMonitor(monitor,retries+1));
 596                         _events.Publish(new Notification
 597                                                                 {Title = "Error", Message = message, Level = TraceLevel.Error});
 598                         Log.Error(message, exc);
 599                 }
 600
 601
 602                 public void NotifyChange(string status, TraceLevel level=TraceLevel.Info)
 603                 {
 604                         StatusMessage = status;
 605
 606                         _events.Publish(new Notification { Title = "Pithos", Message = status, Level = level });
 607                 }
 608
 609                 public void NotifyChangedFile(string filePath)
 610                 {
 611                         var entry = new FileEntry {FullPath=filePath};
 612                         IProducerConsumerCollection<FileEntry> files=RecentFiles;
 613                         FileEntry popped;
 614                         while (files.Count > 5)
 615                                 files.TryTake(out popped);
 616                         files.TryAdd(entry);
 617                 }
 618
 619                 public void NotifyAccount(AccountInfo account)
 620                 {
 621                         if (account== null)
 622                                 return;
 623                         //TODO: What happens to an existing account whose Token has changed?
 624                         account.SiteUri= String.Format("{0}/ui/?token={1}&user={2}",
 625                                 account.SiteUri, Uri.EscapeUriString(account.Token),
 626                                 Uri.EscapeUriString(account.UserName));
 627
 628                         if (Accounts.All(item => item.UserName != account.UserName))
 629                                 Accounts.TryAdd(account);
 630
 631                 }
 632
 633
 634                 public void RemoveMonitor(string accountName)
 635                 {
 636                         if (String.IsNullOrWhiteSpace(accountName))
 637                                 return;
 638
 639                         var accountInfo=_accounts.FirstOrDefault(account => account.UserName == accountName);
 640                         _accounts.TryRemove(accountInfo);
 641
 642                         PithosMonitor monitor;
 643                         if (Monitors.TryRemove(accountName, out monitor))
 644                         {
 645                                 monitor.Stop();
 646                         }
 647                 }
 648
 649                 public void RefreshOverlays()
 650                 {
 651                         foreach (var pair in Monitors)
 652                         {
 653                                 var monitor = pair.Value;
 654
 655                                 var path = monitor.RootPath;
 656
 657                                 if (String.IsNullOrWhiteSpace(path))
 658                                         continue;
 659
 660                                 if (!Directory.Exists(path) && !File.Exists(path))
 661                                         continue;
 662
 663                                 IntPtr pathPointer = Marshal.StringToCoTaskMemAuto(path);
 664
 665                                 try
 666                                 {
 667                                         NativeMethods.SHChangeNotify(HChangeNotifyEventID.SHCNE_UPDATEITEM,
 668                                                                                                  HChangeNotifyFlags.SHCNF_PATHW | HChangeNotifyFlags.SHCNF_FLUSHNOWAIT,
 669                                                                                                  pathPointer, IntPtr.Zero);
 670                                 }
 671                                 finally
 672                                 {
 673                                         Marshal.FreeHGlobal(pathPointer);
 674                                 }
 675                         }
 676                 }
 677
 678                 #region Event Handlers
 679
 680                 public void Handle(SelectiveSynchChanges message)
 681                 {
 682                         var accountName = message.Account.AccountName;
 683                         PithosMonitor monitor;
 684                         if (_monitors.TryGetValue(accountName, out monitor))
 685                         {
 686                                 monitor.AddSelectivePaths(message.Added);
 687                                 monitor.RemoveSelectivePaths(message.Removed);
 688
 689                         }
 690
 691                 }
 692
 693
 694                 public void Handle(Notification notification)
 695                 {
 696                         if (!Settings.ShowDesktopNotifications)
 697                                 return;
 698                         BalloonIcon icon;
 699                         switch (notification.Level)
 700                         {
 701                                 case TraceLevel.Error:
 702                                         icon = BalloonIcon.Error;
 703                                         break;
 704                                 case TraceLevel.Info:
 705                                 case TraceLevel.Verbose:
 706                                         icon = BalloonIcon.Info;
 707                                         break;
 708                                 case TraceLevel.Warning:
 709                                         icon = BalloonIcon.Warning;
 710                                         break;
 711                                 default:
 712                                         icon = BalloonIcon.None;
 713                                         break;
 714                         }
 715
 716                         if (Settings.ShowDesktopNotifications)
 717                         {
 718                                 var tv = (ShellView) GetView();
 719                                 tv.TaskbarView.ShowBalloonTip(notification.Title, notification.Message, icon);
 720                         }
 721                 }
 722                 #endregion
 723
 724                 public void Handle(ShowFilePropertiesEvent message)
 725                 {
 726                         if (message == null)
 727                                 throw new ArgumentNullException("message");
 728                         if (String.IsNullOrWhiteSpace(message.FileName) )
 729                                 throw new ArgumentException("message");
 730                         Contract.EndContractBlock();
 731
 732                         var fileName = message.FileName;
 733             //TODO: Display file properties for non-container folders
 734                         if (File.Exists(fileName))
 735                 //Retrieve the full name with exact casing. Pithos names are case sensitive
 736                 ShowFileProperties(FileInfoExtensions.GetProperFilePathCapitalization(fileName));
 737                         else if (Directory.Exists(fileName))
 738                 //Retrieve the full name with exact casing. Pithos names are case sensitive
 739                         {
 740                 var path = FileInfoExtensions.GetProperDirectoryCapitalization(fileName);
 741                 if (IsContainer(path))
 742                                 ShowContainerProperties(path);
 743                 else
 744                     ShowFileProperties(path);
 745                         }
 746                 }
 747
 748             private bool IsContainer(string path)
 749             {
 750                 var matchingFolders = from account in _accounts
 751                                       from rootFolder in Directory.GetDirectories(account.AccountPath)
 752                                       where rootFolder.Equals(path, StringComparison.InvariantCultureIgnoreCase)
 753                                       select rootFolder;
 754                 return matchingFolders.Any();
 755             }
 756
 757         }
 758 }