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

   1 #region
   2 /* -----------------------------------------------------------------------
   3  * <copyright file="ShellViewModel.cs" company="GRNet">
   4  *
   5  * Copyright 2011-2012 GRNET S.A. All rights reserved.
   6  *
   7  * Redistribution and use in source and binary forms, with or
   8  * without modification, are permitted provided that the following
   9  * conditions are met:
  10  *
  11  *   1. Redistributions of source code must retain the above
  12  *      copyright notice, this list of conditions and the following
  13  *      disclaimer.
  14  *
  15  *   2. Redistributions in binary form must reproduce the above
  16  *      copyright notice, this list of conditions and the following
  17  *      disclaimer in the documentation and/or other materials
  18  *      provided with the distribution.
  19  *
  20  *
  21  * THIS SOFTWARE IS PROVIDED BY GRNET S.A. ``AS IS'' AND ANY EXPRESS
  22  * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
  23  * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  24  * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL GRNET S.A OR
  25  * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  26  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
  27  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
  28  * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
  29  * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  30  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
  31  * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  32  * POSSIBILITY OF SUCH DAMAGE.
  33  *
  34  * The views and conclusions contained in the software and
  35  * documentation are those of the authors and should not be
  36  * interpreted as representing official policies, either expressed
  37  * or implied, of GRNET S.A.
  38  * </copyright>
  39  * -----------------------------------------------------------------------
  40  */
  41 #endregion
  42 using System.Collections.Concurrent;
  43 using System.Diagnostics;
  44 using System.Diagnostics.Contracts;
  45 using System.IO;
  46 using System.Net;
  47 using System.Reflection;
  48 using System.Runtime.InteropServices;
  49 using System.ServiceModel;
  50 using System.Threading.Tasks;
  51 using System.Windows;
  52 using System.Windows.Controls.Primitives;
  53 using AppLimit.NetSparkle;
  54 using Caliburn.Micro;
  55 using Hardcodet.Wpf.TaskbarNotification;
  56 using Pithos.Client.WPF.Configuration;
  57 using Pithos.Client.WPF.FileProperties;
  58 using Pithos.Client.WPF.Preferences;
  59 using Pithos.Client.WPF.SelectiveSynch;
  60 using Pithos.Client.WPF.Services;
  61 using Pithos.Client.WPF.Shell;
  62 using Pithos.Core;
  63 using Pithos.Core.Agents;
  64 using Pithos.Interfaces;
  65 using System;
  66 using System.Collections.Generic;
  67 using System.Linq;
  68 using Pithos.Network;
  69 using StatusService = Pithos.Client.WPF.Services.StatusService;
  70
  71 namespace Pithos.Client.WPF {
  72         using System.ComponentModel.Composition;
  73
  74
  75         ///<summary>
  76         /// The "shell" of the Pithos application displays the taskbar  icon, menu and notifications.
  77         /// The shell also hosts the status service called by shell extensions to retrieve file info
  78         ///</summary>
  79         ///<remarks>
  80         /// It is a strange "shell" as its main visible element is an icon instead of a window
  81         /// The shell subscribes to the following events:
  82         /// * Notification:  Raised by components that want to notify the user. Usually displayed in a balloon
  83         /// * 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
  84         /// * ShowFilePropertiesEvent: Raised when a shell command requests the display of the file/container properties dialog
  85         ///</remarks>
  86         //TODO: CODE SMELL Why does the shell handle the SelectiveSynchChanges?
  87         [Export(typeof(IShell))]
  88         public class ShellViewModel : Screen, IStatusNotification, IShell,
  89                 IHandle<Notification>, IHandle<SelectiveSynchChanges>, IHandle<ShowFilePropertiesEvent>
  90         {
  91
  92                 //The Status Checker provides the current synch state
  93                 //TODO: Could we remove the status checker and use events in its place?
  94                 private readonly IStatusChecker _statusChecker;
  95                 private readonly IEventAggregator _events;
  96
  97                 public PithosSettings Settings { get; private set; }
  98
  99
 100                 private readonly ConcurrentDictionary<string, PithosMonitor> _monitors = new ConcurrentDictionary<string, PithosMonitor>();
 101                 ///<summary>
 102                 /// Dictionary of account monitors, keyed by account
 103                 ///</summary>
 104                 ///<remarks>
 105                 /// One monitor class is created for each account. The Shell needs access to the monitors to execute start/stop/pause commands,
 106                 /// retrieve account and boject info
 107                 ///</remarks>
 108                 // TODO: Does the Shell REALLY need access to the monitors? Could we achieve the same results with a better design?
 109                 // TODO: The monitors should be internal to Pithos.Core, even though exposing them makes coding of the Object and Container windows easier
 110                 public ConcurrentDictionary<string, PithosMonitor> Monitors
 111                 {
 112                         get { return _monitors; }
 113                 }
 114
 115
 116                 ///<summary>
 117                 /// The status service is used by Shell extensions to retrieve file status information
 118                 ///</summary>
 119                 //TODO: CODE SMELL! This is the shell! While hosting in the shell makes executing start/stop commands easier, it is still a smell
 120                 private ServiceHost _statusService;
 121
 122                 //Logging in the Pithos client is provided by log4net
 123         private static readonly log4net.ILog Log = log4net.LogManager.GetLogger(MethodBase.GetCurrentMethod().DeclaringType);
 124
 125                 //Lazily initialized File Version info. This is done once and lazily to avoid blocking the UI
 126                 private readonly Lazy<FileVersionInfo> _fileVersion;
 127
 128             private readonly PollAgent _pollAgent;
 129
 130                 ///<summary>
 131                 /// The Shell depends on MEF to provide implementations for windowManager, events, the status checker service and the settings
 132                 ///</summary>
 133                 ///<remarks>
 134                 /// The PithosSettings class encapsulates the app's settings to abstract their storage mechanism (App settings, a database or registry)
 135                 ///</remarks>
 136                 [ImportingConstructor]
 137                 public ShellViewModel(IWindowManager windowManager, IEventAggregator events, IStatusChecker statusChecker, PithosSettings settings,PollAgent pollAgent)
 138                 {
 139                         try
 140                         {
 141
 142                                 _windowManager = windowManager;
 143                                 //CHECK: Caliburn doesn't need explicit command construction
 144                                 //OpenPithosFolderCommand = new PithosCommand(OpenPithosFolder);
 145                                 _statusChecker = statusChecker;
 146                                 //The event subst
 147                                 _events = events;
 148                                 _events.Subscribe(this);
 149
 150                             _pollAgent = pollAgent;
 151                                 Settings = settings;
 152
 153                                 Proxy.SetFromSettings(settings);
 154
 155                                 StatusMessage = "In Synch";
 156
 157                                 _fileVersion=  new Lazy<FileVersionInfo>(() =>
 158                                 {
 159                                         Assembly assembly = Assembly.GetExecutingAssembly();
 160                                         var fileVersion = FileVersionInfo.GetVersionInfo(assembly.Location);
 161                                         return fileVersion;
 162                                 });
 163                                 _accounts.CollectionChanged += (sender, e) =>
 164                                                                                                    {
 165                                                                                                            NotifyOfPropertyChange(() => OpenFolderCaption);
 166                                                                                                            NotifyOfPropertyChange(() => HasAccounts);
 167                                                                                                    };
 168
 169                         }
 170                         catch (Exception exc)
 171                         {
 172                                 Log.Error("Error while starting the ShellViewModel",exc);
 173                                 throw;
 174                         }
 175
 176                 }
 177
 178
 179                 protected override void OnActivate()
 180                 {
 181                         base.OnActivate();
 182
 183             _sparkle = new Sparkle(Settings.UpdateUrl);
 184             _sparkle.updateDetected += OnUpgradeDetected;
 185             _sparkle.ShowDiagnosticWindow = Settings.UpdateDiagnostics;
 186
 187             //Must delay opening the upgrade window
 188             //to avoid Windows Messages sent by the TaskbarIcon
 189             TaskEx.Delay(5000).ContinueWith(_=>
 190                 Execute.OnUIThread(()=> _sparkle.StartLoop(true,Settings.UpdateForceCheck,Settings.UpdateCheckInterval)));
 191
 192
 193                         StartMonitoring();
 194                 }
 195
 196             private void OnUpgradeDetected(object sender, UpdateDetectedEventArgs e)
 197             {
 198                 Log.InfoFormat("Update detected {0}",e.LatestVersion);
 199             }
 200
 201         public void CheckForUpgrade()
 202         {
 203             _sparkle.StopLoop();
 204             _sparkle.Dispose();
 205             _sparkle=new Sparkle(Settings.UpdateUrl);
 206             _sparkle.StartLoop(true,true,Settings.UpdateCheckInterval);
 207         }
 208
 209             private async void StartMonitoring()
 210                 {
 211                         try
 212                         {
 213                                 var accounts = Settings.Accounts.Select(MonitorAccount);
 214                                 await TaskEx.WhenAll(accounts);
 215                                 _statusService = StatusService.Start();
 216
 217 /*
 218                                 foreach (var account in Settings.Accounts)
 219                                 {
 220                                         await MonitorAccount(account);
 221                                 }
 222 */
 223
 224                         }
 225                         catch (AggregateException exc)
 226                         {
 227                                 exc.Handle(e =>
 228                                 {
 229                                         Log.Error("Error while starting monitoring", e);
 230                                         return true;
 231                                 });
 232                                 throw;
 233                         }
 234                 }
 235
 236                 protected override void OnDeactivate(bool close)
 237                 {
 238                         base.OnDeactivate(close);
 239                         if (close)
 240                         {
 241                                 StatusService.Stop(_statusService);
 242                                 _statusService = null;
 243                         }
 244                 }
 245
 246                 public Task MonitorAccount(AccountSettings account)
 247                 {
 248                         return Task.Factory.StartNew(() =>
 249                         {
 250                                 PithosMonitor monitor;
 251                                 var accountName = account.AccountName;
 252
 253                                 if (_monitors.TryGetValue(accountName, out monitor))
 254                                 {
 255                                         //If the account is active
 256                     if (account.IsActive)
 257                     {
 258                         //The Api Key may have changed throuth the Preferences dialog
 259                         monitor.ApiKey = account.ApiKey;
 260                                                 Debug.Assert(monitor.StatusNotification == this,"An existing monitor should already have a StatusNotification service object");
 261                         monitor.RootPath = account.RootPath;
 262                         //Start the monitor. It's OK to start an already started monitor,
 263                         //it will just ignore the call
 264                         StartMonitor(monitor).Wait();
 265                     }
 266                     else
 267                     {
 268                         //If the account is inactive
 269                         //Stop and remove the monitor
 270                         RemoveMonitor(accountName);
 271                     }
 272                                         return;
 273                                 }
 274
 275
 276                                 //Create a new monitor/ Can't use MEF here, it would return a single instance for all monitors
 277                                 monitor = new PithosMonitor
 278                                                           {
 279                                                                   UserName = accountName,
 280                                                                   ApiKey = account.ApiKey,
 281                                                                   StatusNotification = this,
 282                                                                   RootPath = account.RootPath
 283                                                           };
 284                                 //PithosMonitor uses MEF so we need to resolve it
 285                                 IoC.BuildUp(monitor);
 286
 287                                 monitor.AuthenticationUrl = account.ServerUrl;
 288
 289                                 _monitors[accountName] = monitor;
 290
 291                                 if (account.IsActive)
 292                                 {
 293                                         //Don't start a monitor if it doesn't have an account and ApiKey
 294                                         if (String.IsNullOrWhiteSpace(monitor.UserName) ||
 295                                                 String.IsNullOrWhiteSpace(monitor.ApiKey))
 296                                                 return;
 297                                         StartMonitor(monitor);
 298                                 }
 299                         });
 300                 }
 301
 302
 303                 protected override void OnViewLoaded(object view)
 304                 {
 305                         UpdateStatus();
 306                         var window = (Window)view;
 307                         TaskEx.Delay(1000).ContinueWith(t => Execute.OnUIThread(window.Hide));
 308                         base.OnViewLoaded(view);
 309                 }
 310
 311
 312                 #region Status Properties
 313
 314                 private string _statusMessage;
 315                 public string StatusMessage
 316                 {
 317                         get { return _statusMessage; }
 318                         set
 319                         {
 320                                 _statusMessage = value;
 321                                 NotifyOfPropertyChange(() => StatusMessage);
 322                         }
 323                 }
 324
 325                 private readonly ObservableConcurrentCollection<AccountInfo> _accounts = new ObservableConcurrentCollection<AccountInfo>();
 326                 public ObservableConcurrentCollection<AccountInfo> Accounts
 327                 {
 328                         get { return _accounts; }
 329                 }
 330
 331                 public bool HasAccounts
 332                 {
 333                         get { return _accounts.Count > 0; }
 334                 }
 335
 336
 337                 public string OpenFolderCaption
 338                 {
 339                         get
 340                         {
 341                                 return (_accounts.Count == 0)
 342                                                 ? "No Accounts Defined"
 343                                                 : "Open Pithos Folder";
 344                         }
 345                 }
 346
 347                 private string _pauseSyncCaption="Pause Synching";
 348                 public string PauseSyncCaption
 349                 {
 350                         get { return _pauseSyncCaption; }
 351                         set
 352                         {
 353                                 _pauseSyncCaption = value;
 354                                 NotifyOfPropertyChange(() => PauseSyncCaption);
 355                         }
 356                 }
 357
 358                 private readonly ObservableConcurrentCollection<FileEntry> _recentFiles = new ObservableConcurrentCollection<FileEntry>();
 359                 public ObservableConcurrentCollection<FileEntry> RecentFiles
 360                 {
 361                         get { return _recentFiles; }
 362                 }
 363
 364
 365                 private string _statusIcon="../Images/Pithos.ico";
 366                 public string StatusIcon
 367                 {
 368                         get { return _statusIcon; }
 369                         set
 370                         {
 371                                 //TODO: Ensure all status icons use the Pithos logo
 372                                 _statusIcon = value;
 373                                 NotifyOfPropertyChange(() => StatusIcon);
 374                         }
 375                 }
 376
 377                 #endregion
 378
 379                 #region Commands
 380
 381         public void ShowPreferences()
 382         {
 383             ShowPreferences(null);
 384         }
 385
 386                 public void ShowPreferences(string currentTab)
 387                 {
 388                         //Settings.Reload();
 389                     var preferences = new PreferencesViewModel(_windowManager, _events, this, Settings,currentTab);
 390                     _windowManager.ShowDialog(preferences);
 391
 392                 }
 393
 394                 public void AboutPithos()
 395                 {
 396                         var about = new AboutViewModel();
 397                         _windowManager.ShowWindow(about);
 398                 }
 399
 400                 public void SendFeedback()
 401                 {
 402                         var feedBack =  IoC.Get<FeedbackViewModel>();
 403                         _windowManager.ShowWindow(feedBack);
 404                 }
 405
 406                 //public PithosCommand OpenPithosFolderCommand { get; private set; }
 407
 408                 public void OpenPithosFolder()
 409                 {
 410                         var account = Settings.Accounts.FirstOrDefault(acc => acc.IsActive);
 411                         if (account == null)
 412                                 return;
 413                         Process.Start(account.RootPath);
 414                 }
 415
 416                 public void OpenPithosFolder(AccountInfo account)
 417                 {
 418                         Process.Start(account.AccountPath);
 419                 }
 420
 421
 422 /*
 423                 public void GoToSite()
 424                 {
 425                         var site = Properties.Settings.Default.PithosSite;
 426                         Process.Start(site);
 427                 }
 428 */
 429
 430                 public void GoToSite(AccountInfo account)
 431                 {
 432                     var uri = account.SiteUri.Replace("http://","https://");
 433                     Process.Start(uri);
 434                 }
 435
 436             /// <summary>
 437         /// Open an explorer window to the target path's directory
 438         /// and select the file
 439         /// </summary>
 440         /// <param name="entry"></param>
 441         public void GoToFile(FileEntry entry)
 442         {
 443             var fullPath = entry.FullPath;
 444             if (!File.Exists(fullPath) && !Directory.Exists(fullPath))
 445                 return;
 446             Process.Start("explorer.exe","/select, " + fullPath);
 447         }
 448
 449         public void OpenLogPath()
 450         {
 451             var appDataPath = Environment.GetFolderPath(Environment.SpecialFolder.LocalApplicationData);
 452             var pithosDataPath = Path.Combine(appDataPath, "GRNET");
 453
 454             Process.Start(pithosDataPath);
 455         }
 456
 457         public void ShowFileProperties()
 458                 {
 459                         var account = Settings.Accounts.First(acc => acc.IsActive);
 460                         var dir = new DirectoryInfo(account.RootPath + @"\pithos");
 461                         var files=dir.GetFiles();
 462                         var r=new Random();
 463                         var idx=r.Next(0, files.Length);
 464                         ShowFileProperties(files[idx].FullName);
 465                 }
 466
 467                 public void ShowFileProperties(string filePath)
 468                 {
 469                         if (String.IsNullOrWhiteSpace(filePath))
 470                                 throw new ArgumentNullException("filePath");
 471                         if (!File.Exists(filePath) && !Directory.Exists(filePath))
 472                                 throw new ArgumentException(String.Format("Non existent file {0}",filePath),"filePath");
 473                         Contract.EndContractBlock();
 474
 475                         var pair=(from monitor in  Monitors
 476                                                            where filePath.StartsWith(monitor.Value.RootPath, StringComparison.InvariantCultureIgnoreCase)
 477                                                                    select monitor).FirstOrDefault();
 478                         var accountMonitor = pair.Value;
 479
 480                         if (accountMonitor == null)
 481                                 return;
 482
 483                         var infoTask=Task.Factory.StartNew(()=>accountMonitor.GetObjectInfo(filePath));
 484
 485
 486
 487                         var fileProperties = new FilePropertiesViewModel(this, infoTask,filePath);
 488                         _windowManager.ShowWindow(fileProperties);
 489                 }
 490
 491                 public void ShowContainerProperties()
 492                 {
 493                         var account = Settings.Accounts.First(acc => acc.IsActive);
 494                         var dir = new DirectoryInfo(account.RootPath);
 495                         var fullName = (from folder in dir.EnumerateDirectories()
 496                                                         where (folder.Attributes & FileAttributes.Hidden) == 0
 497                                                         select folder.FullName).First();
 498                         ShowContainerProperties(fullName);
 499                 }
 500
 501                 public void ShowContainerProperties(string filePath)
 502                 {
 503                         if (String.IsNullOrWhiteSpace(filePath))
 504                                 throw new ArgumentNullException("filePath");
 505                         if (!Directory.Exists(filePath))
 506                                 throw new ArgumentException(String.Format("Non existent file {0}",filePath),"filePath");
 507                         Contract.EndContractBlock();
 508
 509                         var pair=(from monitor in  Monitors
 510                                                            where filePath.StartsWith(monitor.Value.RootPath, StringComparison.InvariantCultureIgnoreCase)
 511                                                                    select monitor).FirstOrDefault();
 512                         var accountMonitor = pair.Value;
 513                         var info = accountMonitor.GetContainerInfo(filePath);
 514
 515
 516
 517                         var containerProperties = new ContainerPropertiesViewModel(this, info,filePath);
 518                         _windowManager.ShowWindow(containerProperties);
 519                 }
 520
 521                 public void SynchNow()
 522                 {
 523                         _pollAgent.SynchNow();
 524                 }
 525
 526                 public ObjectInfo RefreshObjectInfo(ObjectInfo currentInfo)
 527                 {
 528                         if (currentInfo==null)
 529                                 throw new ArgumentNullException("currentInfo");
 530                         Contract.EndContractBlock();
 531
 532                         var monitor = Monitors[currentInfo.Account];
 533                         var newInfo=monitor.CloudClient.GetObjectInfo(currentInfo.Account, currentInfo.Container, currentInfo.Name);
 534                         return newInfo;
 535                 }
 536
 537                 public ContainerInfo RefreshContainerInfo(ContainerInfo container)
 538                 {
 539                         if (container == null)
 540                                 throw new ArgumentNullException("container");
 541                         Contract.EndContractBlock();
 542
 543                         var monitor = Monitors[container.Account];
 544                         var newInfo = monitor.CloudClient.GetContainerInfo(container.Account, container.Name);
 545                         return newInfo;
 546                 }
 547
 548
 549                 public void ToggleSynching()
 550                 {
 551                         bool isPaused=false;
 552                         foreach (var pair in Monitors)
 553                         {
 554                                 var monitor = pair.Value;
 555                                 monitor.Pause = !monitor.Pause;
 556                                 isPaused = monitor.Pause;
 557                         }
 558
 559
 560                         PauseSyncCaption = isPaused ? "Resume syncing" : "Pause syncing";
 561                         var iconKey = isPaused? "TraySyncPaused" : "TrayInSynch";
 562                         StatusIcon = String.Format(@"../Images/{0}.ico", iconKey);
 563                 }
 564
 565                 public void ExitPithos()
 566                 {
 567                         foreach (var pair in Monitors)
 568                         {
 569                                 var monitor = pair.Value;
 570                                 monitor.Stop();
 571                         }
 572
 573                         ((Window)GetView()).Close();
 574                 }
 575                 #endregion
 576
 577
 578                 private readonly Dictionary<PithosStatus, StatusInfo> _iconNames = new List<StatusInfo>
 579                         {
 580                                 new StatusInfo(PithosStatus.InSynch, "All files up to date", "TrayInSynch"),
 581                                 new StatusInfo(PithosStatus.PollSyncing, "Polling Files", "TraySynching"),
 582                 new StatusInfo(PithosStatus.LocalSyncing, "Syncing Files", "TraySynching"),
 583                                 new StatusInfo(PithosStatus.SyncPaused, "Sync Paused", "TraySyncPaused")
 584                         }.ToDictionary(s => s.Status);
 585
 586                 readonly IWindowManager _windowManager;
 587
 588         //private int _syncCount=0;
 589
 590
 591         private PithosStatus _pithosStatus = PithosStatus.Disconnected;
 592
 593         public void SetPithosStatus(PithosStatus status)
 594         {
 595             if (_pithosStatus == PithosStatus.LocalSyncing && status == PithosStatus.PollComplete)
 596                 return;
 597             if (_pithosStatus == PithosStatus.PollSyncing && status == PithosStatus.LocalComplete)
 598                 return;
 599             if (status == PithosStatus.LocalComplete || status == PithosStatus.PollComplete)
 600                 _pithosStatus = PithosStatus.InSynch;
 601             else
 602                 _pithosStatus = status;
 603             UpdateStatus();
 604         }
 605
 606         public void SetPithosStatus(PithosStatus status,string message)
 607         {
 608             StatusMessage = message;
 609             SetPithosStatus(status);
 610         }
 611
 612
 613
 614                 ///<summary>
 615                 /// Updates the visual status indicators of the application depending on status changes, e.g. icon, stat
 616                 ///</summary>
 617                 public void UpdateStatus()
 618                 {
 619
 620                         if (_iconNames.ContainsKey(_pithosStatus))
 621                         {
 622                                 var info = _iconNames[_pithosStatus];
 623                                 StatusIcon = String.Format(@"../Images/{0}.ico", info.IconName);
 624                         }
 625
 626             if (_pithosStatus == PithosStatus.InSynch)
 627                 StatusMessage = "All files up to date";
 628                 }
 629
 630
 631
 632                 private Task StartMonitor(PithosMonitor monitor,int retries=0)
 633                 {
 634                         return Task.Factory.StartNew(() =>
 635                         {
 636                                 using (log4net.ThreadContext.Stacks["Monitor"].Push("Start"))
 637                                 {
 638                                         try
 639                                         {
 640                                                 Log.InfoFormat("Start Monitoring {0}", monitor.UserName);
 641
 642                                                 monitor.Start();
 643                                         }
 644                                         catch (WebException exc)
 645                                         {
 646                                                 if (AbandonRetry(monitor, retries))
 647                                                         return;
 648
 649                                                 HttpStatusCode statusCode =HttpStatusCode.OK;
 650                                                 var response = exc.Response as HttpWebResponse;
 651                                                 if(response!=null)
 652                                                         statusCode = response.StatusCode;
 653
 654                                                 switch (statusCode)
 655                                                 {
 656                                                         case HttpStatusCode.Unauthorized:
 657                                                                 var message = String.Format("API Key Expired for {0}. Starting Renewal",
 658                                                                                                                         monitor.UserName);
 659                                                                 Log.Error(message, exc);
 660                                                         var account = Settings.Accounts.Find(acc => acc.AccountName == monitor.UserName);
 661                                                         account.IsExpired = true;
 662                                 Notify(new ExpirationNotification(account));
 663                                                                 //TryAuthorize(monitor.UserName, retries).Wait();
 664                                                                 break;
 665                                                         case HttpStatusCode.ProxyAuthenticationRequired:
 666                                                                 TryAuthenticateProxy(monitor,retries);
 667                                                                 break;
 668                                                         default:
 669                                                                 TryLater(monitor, exc, retries);
 670                                                                 break;
 671                                                 }
 672                                         }
 673                                         catch (Exception exc)
 674                                         {
 675                                                 if (AbandonRetry(monitor, retries))
 676                                                         return;
 677
 678                                                 TryLater(monitor,exc,retries);
 679                                         }
 680                                 }
 681                         });
 682                 }
 683
 684                 private void TryAuthenticateProxy(PithosMonitor monitor,int retries)
 685                 {
 686                         Execute.OnUIThread(() =>
 687                                                                    {
 688                                                                            var proxyAccount = IoC.Get<ProxyAccountViewModel>();
 689                                                                                 proxyAccount.Settings = Settings;
 690                                                                            if (true != _windowManager.ShowDialog(proxyAccount))
 691                                                                                    return;
 692                                                                            StartMonitor(monitor, retries);
 693                                                                            NotifyOfPropertyChange(() => Accounts);
 694                                                                    });
 695                 }
 696
 697                 private bool AbandonRetry(PithosMonitor monitor, int retries)
 698                 {
 699                         if (retries > 1)
 700                         {
 701                                 var message = String.Format("Monitoring of account {0} has failed too many times. Will not retry",
 702                                                                                         monitor.UserName);
 703                                 _events.Publish(new Notification
 704                                                                         {Title = "Account monitoring failed", Message = message, Level = TraceLevel.Error});
 705                                 return true;
 706                         }
 707                         return false;
 708                 }
 709
 710
 711             private void TryLater(PithosMonitor monitor, Exception exc,int retries)
 712                 {
 713                         var message = String.Format("An exception occured. Can't start monitoring\nWill retry in 10 seconds");
 714                         Task.Factory.StartNewDelayed(10000, () => StartMonitor(monitor,retries+1));
 715                         _events.Publish(new Notification
 716                                                                 {Title = "Error", Message = message, Level = TraceLevel.Error});
 717                         Log.Error(message, exc);
 718                 }
 719
 720
 721                 public void NotifyChange(string status, TraceLevel level=TraceLevel.Info)
 722                 {
 723                         StatusMessage = status;
 724
 725                         _events.Publish(new Notification { Title = "Pithos", Message = status, Level = level });
 726                 }
 727
 728                 public void NotifyChangedFile(string filePath)
 729                 {
 730             if (RecentFiles.Any(e => e.FullPath == filePath))
 731                 return;
 732
 733                         IProducerConsumerCollection<FileEntry> files=RecentFiles;
 734                         FileEntry popped;
 735                         while (files.Count > 5)
 736                                 files.TryTake(out popped);
 737             var entry = new FileEntry { FullPath = filePath };
 738                         files.TryAdd(entry);
 739                 }
 740
 741                 public void NotifyAccount(AccountInfo account)
 742                 {
 743                         if (account== null)
 744                                 return;
 745                         //TODO: What happens to an existing account whose Token has changed?
 746                         account.SiteUri= String.Format("{0}/ui/?token={1}&user={2}",
 747                                 account.SiteUri, Uri.EscapeDataString(account.Token),
 748                                 Uri.EscapeDataString(account.UserName));
 749
 750                         if (Accounts.All(item => item.UserName != account.UserName))
 751                                 Accounts.TryAdd(account);
 752
 753                 }
 754
 755                 public void NotifyConflicts(IEnumerable<FileSystemInfo> conflictFiles, string message)
 756                 {
 757                         if (conflictFiles == null)
 758                                 return;
 759                     //Convert to list to avoid multiple iterations
 760             var files = conflictFiles.ToList();
 761                         if (files.Count==0)
 762                                 return;
 763
 764                         UpdateStatus();
 765                         //TODO: Create a more specific message. For now, just show a warning
 766                         NotifyForFiles(files,message,TraceLevel.Warning);
 767
 768                 }
 769
 770                 public void NotifyForFiles(IEnumerable<FileSystemInfo> files, string message,TraceLevel level=TraceLevel.Info)
 771                 {
 772                         if (files == null)
 773                                 return;
 774                         if (!files.Any())
 775                                 return;
 776
 777                         StatusMessage = message;
 778
 779                         _events.Publish(new Notification { Title = "Pithos", Message = message, Level = level});
 780                 }
 781
 782                 public void Notify(Notification notification)
 783                 {
 784                         _events.Publish(notification);
 785                 }
 786
 787
 788                 public void RemoveMonitor(string accountName)
 789                 {
 790                         if (String.IsNullOrWhiteSpace(accountName))
 791                                 return;
 792
 793                         var accountInfo=_accounts.FirstOrDefault(account => account.UserName == accountName);
 794             if (accountInfo != null)
 795             {
 796                 _accounts.TryRemove(accountInfo);
 797                 _pollAgent.RemoveAccount(accountInfo);
 798             }
 799
 800                     PithosMonitor monitor;
 801                         if (Monitors.TryRemove(accountName, out monitor))
 802                         {
 803                                 monitor.Stop();
 804                 //TODO: Also remove any pending actions for this account
 805                 //from the network queue
 806                         }
 807                 }
 808
 809                 public void RefreshOverlays()
 810                 {
 811                         foreach (var pair in Monitors)
 812                         {
 813                                 var monitor = pair.Value;
 814
 815                                 var path = monitor.RootPath;
 816
 817                                 if (String.IsNullOrWhiteSpace(path))
 818                                         continue;
 819
 820                                 if (!Directory.Exists(path) && !File.Exists(path))
 821                                         continue;
 822
 823                                 IntPtr pathPointer = Marshal.StringToCoTaskMemAuto(path);
 824
 825                                 try
 826                                 {
 827                                         NativeMethods.SHChangeNotify(HChangeNotifyEventID.SHCNE_UPDATEITEM,
 828                                                                                                  HChangeNotifyFlags.SHCNF_PATHW | HChangeNotifyFlags.SHCNF_FLUSHNOWAIT,
 829                                                                                                  pathPointer, IntPtr.Zero);
 830                                 }
 831                                 finally
 832                                 {
 833                                         Marshal.FreeHGlobal(pathPointer);
 834                                 }
 835                         }
 836                 }
 837
 838                 #region Event Handlers
 839
 840                 public void Handle(SelectiveSynchChanges message)
 841                 {
 842                         var accountName = message.Account.AccountName;
 843                         PithosMonitor monitor;
 844                         if (_monitors.TryGetValue(accountName, out monitor))
 845                         {
 846                                 monitor.SetSelectivePaths(message.Uris,message.Added,message.Removed);
 847
 848                         }
 849
 850                 }
 851
 852
 853                 private bool _pollStarted;
 854             private Sparkle _sparkle;
 855
 856             //SMELL: Doing so much work for notifications in the shell is wrong
 857                 //The notifications should be moved to their own view/viewmodel pair
 858                 //and different templates should be used for different message types
 859                 //This will also allow the addition of extra functionality, eg. actions
 860                 //
 861                 public void Handle(Notification notification)
 862                 {
 863                         UpdateStatus();
 864
 865                         if (!Settings.ShowDesktopNotifications)
 866                                 return;
 867
 868                         if (notification is PollNotification)
 869                         {
 870                                 _pollStarted = true;
 871                                 return;
 872                         }
 873                         if (notification is CloudNotification)
 874                         {
 875                                 if (!_pollStarted)
 876                                         return;
 877                                 _pollStarted= false;
 878                                 notification.Title = "Pithos";
 879                                 notification.Message = "Start Synchronisation";
 880                         }
 881
 882                     var progress = notification as ProgressNotification;
 883                     if (progress != null)
 884                     {
 885                         StatusMessage = String.Format("Pithos {0}\r\n{1} {2:p2} of {3} - {4}",
 886                                                       _fileVersion.Value.FileVersion,
 887                                               progress.Action,
 888                                                       progress.Block/(double)progress.TotalBlocks,
 889                                                       progress.FileSize.ToByteSize(),
 890                                                       progress.FileName);
 891                         return;
 892                     }
 893
 894                     var info = notification as StatusNotification;
 895             if (info != null)
 896             {
 897                 StatusMessage = String.Format("Pithos {0}\r\n{1}",
 898                                               _fileVersion.Value.FileVersion,
 899                                               info.Title);
 900                 return;
 901             }
 902                         if (String.IsNullOrWhiteSpace(notification.Message) && String.IsNullOrWhiteSpace(notification.Title))
 903                                 return;
 904
 905                         ShowBalloonFor(notification);
 906                 }
 907
 908             private void ShowBalloonFor(Notification notification)
 909             {
 910             Contract.Requires(notification!=null);
 911
 912             if (!Settings.ShowDesktopNotifications)
 913                 return;
 914
 915             BalloonIcon icon;
 916                 switch (notification.Level)
 917                 {
 918                     case TraceLevel.Info:
 919                     case TraceLevel.Verbose:
 920                         return;
 921                 case TraceLevel.Error:
 922                     icon = BalloonIcon.Error;
 923                     break;
 924                 case TraceLevel.Warning:
 925                         icon = BalloonIcon.Warning;
 926                         break;
 927                     default:
 928                         return;
 929                 }
 930
 931                 var tv = (ShellView) GetView();
 932                 System.Action clickAction = null;
 933                 if (notification is ExpirationNotification)
 934                 {
 935                     clickAction = () => ShowPreferences("AccountTab");
 936                 }
 937                 var balloon = new PithosBalloon
 938                                   {
 939                                       Title = notification.Title,
 940                                       Message = notification.Message,
 941                                       Icon = icon,
 942                                       ClickAction = clickAction
 943                                   };
 944                 tv.TaskbarView.ShowCustomBalloon(balloon, PopupAnimation.Fade, 4000);
 945             }
 946
 947             #endregion
 948
 949                 public void Handle(ShowFilePropertiesEvent message)
 950                 {
 951                         if (message == null)
 952                                 throw new ArgumentNullException("message");
 953                         if (String.IsNullOrWhiteSpace(message.FileName) )
 954                                 throw new ArgumentException("message");
 955                         Contract.EndContractBlock();
 956
 957                         var fileName = message.FileName;
 958                         //TODO: Display file properties for non-container folders
 959                         if (File.Exists(fileName))
 960                                 //Retrieve the full name with exact casing. Pithos names are case sensitive
 961                                 ShowFileProperties(FileInfoExtensions.GetProperFilePathCapitalization(fileName));
 962                         else if (Directory.Exists(fileName))
 963                                 //Retrieve the full name with exact casing. Pithos names are case sensitive
 964                         {
 965                                 var path = FileInfoExtensions.GetProperDirectoryCapitalization(fileName);
 966                                 if (IsContainer(path))
 967                                         ShowContainerProperties(path);
 968                                 else
 969                                         ShowFileProperties(path);
 970                         }
 971                 }
 972
 973                 private bool IsContainer(string path)
 974                 {
 975                         var matchingFolders = from account in _accounts
 976                                                                   from rootFolder in Directory.GetDirectories(account.AccountPath)
 977                                                                   where rootFolder.Equals(path, StringComparison.InvariantCultureIgnoreCase)
 978                                                                   select rootFolder;
 979                         return matchingFolders.Any();
 980                 }
 981
 982                 public FileStatus GetFileStatus(string localFileName)
 983                 {
 984                         if (String.IsNullOrWhiteSpace(localFileName))
 985                                 throw new ArgumentNullException("localFileName");
 986                         Contract.EndContractBlock();
 987
 988                         var statusKeeper = IoC.Get<IStatusKeeper>();
 989                         var status=statusKeeper.GetFileStatus(localFileName);
 990                         return status;
 991                 }
 992         }
 993 }