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
 131             private MiniStatusViewModel _miniStatus;
 132
 133             [Import]
 134         public MiniStatusViewModel MiniStatus
 135             {
 136                 get { return _miniStatus; }
 137                 set
 138                 {
 139                     _miniStatus = value;
 140                     _miniStatus.Shell = this;
 141                 }
 142             }
 143
 144             ///<summary>
 145                 /// The Shell depends on MEF to provide implementations for windowManager, events, the status checker service and the settings
 146                 ///</summary>
 147                 ///<remarks>
 148                 /// The PithosSettings class encapsulates the app's settings to abstract their storage mechanism (App settings, a database or registry)
 149                 ///</remarks>
 150                 [ImportingConstructor]
 151                 public ShellViewModel(IWindowManager windowManager, IEventAggregator events, IStatusChecker statusChecker, PithosSettings settings,PollAgent pollAgent)
 152                 {
 153                         try
 154                         {
 155
 156                                 _windowManager = windowManager;
 157                                 //CHECK: Caliburn doesn't need explicit command construction
 158                                 //OpenPithosFolderCommand = new PithosCommand(OpenPithosFolder);
 159                                 _statusChecker = statusChecker;
 160                                 //The event subst
 161                                 _events = events;
 162                                 _events.Subscribe(this);
 163
 164                             _pollAgent = pollAgent;
 165                                 Settings = settings;
 166
 167                                 Proxy.SetFromSettings(settings);
 168
 169                 StatusMessage = Settings.Accounts.Count==0
 170                     ? "No Accounts added. Please add an account"
 171                     : "Starting";
 172
 173                                 _fileVersion=  new Lazy<FileVersionInfo>(() =>
 174                                 {
 175                                         Assembly assembly = Assembly.GetExecutingAssembly();
 176                                         var fileVersion = FileVersionInfo.GetVersionInfo(assembly.Location);
 177                                         return fileVersion;
 178                                 });
 179                                 _accounts.CollectionChanged += (sender, e) =>
 180                                                                                                    {
 181                                                                                                            NotifyOfPropertyChange(() => OpenFolderCaption);
 182                                                                                                            NotifyOfPropertyChange(() => HasAccounts);
 183                                                                                                    };
 184
 185                         }
 186                         catch (Exception exc)
 187                         {
 188                                 Log.Error("Error while starting the ShellViewModel",exc);
 189                                 throw;
 190                         }
 191
 192                 }
 193
 194
 195                 protected override void OnActivate()
 196                 {
 197                         base.OnActivate();
 198
 199             _sparkle = new Sparkle(Settings.UpdateUrl);
 200             _sparkle.updateDetected += OnUpgradeDetected;
 201             _sparkle.ShowDiagnosticWindow = Settings.UpdateDiagnostics;
 202
 203             //Must delay opening the upgrade window
 204             //to avoid Windows Messages sent by the TaskbarIcon
 205             TaskEx.Delay(5000).ContinueWith(_=>
 206                 Execute.OnUIThread(()=> _sparkle.StartLoop(true,Settings.UpdateForceCheck,Settings.UpdateCheckInterval)));
 207
 208
 209                         StartMonitoring();
 210                 }
 211
 212             private void OnUpgradeDetected(object sender, UpdateDetectedEventArgs e)
 213             {
 214                 Log.InfoFormat("Update detected {0}",e.LatestVersion);
 215             }
 216
 217         public void CheckForUpgrade()
 218         {
 219             Log.Error("Test Error message");
 220             _sparkle.StopLoop();
 221             _sparkle.Dispose();
 222             _sparkle=new Sparkle(Settings.UpdateUrl);
 223             _sparkle.StartLoop(true,true,Settings.UpdateCheckInterval);
 224         }
 225
 226             private async void StartMonitoring()
 227                 {
 228                         try
 229                         {
 230                                 var accounts = Settings.Accounts.Select(MonitorAccount);
 231                                 await TaskEx.WhenAll(accounts);
 232                                 _statusService = StatusService.Start();
 233
 234 /*
 235                                 foreach (var account in Settings.Accounts)
 236                                 {
 237                                         await MonitorAccount(account);
 238                                 }
 239 */
 240
 241                         }
 242                         catch (AggregateException exc)
 243                         {
 244                                 exc.Handle(e =>
 245                                 {
 246                                         Log.Error("Error while starting monitoring", e);
 247                                         return true;
 248                                 });
 249                                 throw;
 250                         }
 251                 }
 252
 253                 protected override void OnDeactivate(bool close)
 254                 {
 255                         base.OnDeactivate(close);
 256                         if (close)
 257                         {
 258                                 StatusService.Stop(_statusService);
 259                                 _statusService = null;
 260                         }
 261                 }
 262
 263                 public Task MonitorAccount(AccountSettings account)
 264                 {
 265                         return Task.Factory.StartNew(() =>
 266                         {
 267                                 PithosMonitor monitor;
 268                                 var accountName = account.AccountName;
 269
 270                                 if (_monitors.TryGetValue(accountName, out monitor))
 271                                 {
 272                                         //If the account is active
 273                     if (account.IsActive)
 274                     {
 275                         //The Api Key may have changed throuth the Preferences dialog
 276                         monitor.ApiKey = account.ApiKey;
 277                                                 Debug.Assert(monitor.StatusNotification == this,"An existing monitor should already have a StatusNotification service object");
 278                         monitor.RootPath = account.RootPath;
 279                         //Start the monitor. It's OK to start an already started monitor,
 280                         //it will just ignore the call
 281                         StartMonitor(monitor).Wait();
 282                     }
 283                     else
 284                     {
 285                         //If the account is inactive
 286                         //Stop and remove the monitor
 287                         RemoveMonitor(accountName);
 288                     }
 289                                         return;
 290                                 }
 291
 292
 293                                 //Create a new monitor/ Can't use MEF here, it would return a single instance for all monitors
 294                                 monitor = new PithosMonitor
 295                                                           {
 296                                                                   UserName = accountName,
 297                                                                   ApiKey = account.ApiKey,
 298                                                                   StatusNotification = this,
 299                                                                   RootPath = account.RootPath
 300                                                           };
 301                                 //PithosMonitor uses MEF so we need to resolve it
 302                                 IoC.BuildUp(monitor);
 303
 304                                 monitor.AuthenticationUrl = account.ServerUrl;
 305
 306                                 _monitors[accountName] = monitor;
 307
 308                                 if (account.IsActive)
 309                                 {
 310                                         //Don't start a monitor if it doesn't have an account and ApiKey
 311                                         if (String.IsNullOrWhiteSpace(monitor.UserName) ||
 312                                                 String.IsNullOrWhiteSpace(monitor.ApiKey))
 313                                                 return;
 314                                         StartMonitor(monitor);
 315                                 }
 316                         });
 317                 }
 318
 319
 320                 protected override void OnViewLoaded(object view)
 321                 {
 322                         UpdateStatus();
 323                         var window = (Window)view;
 324                         TaskEx.Delay(1000).ContinueWith(t => Execute.OnUIThread(window.Hide));
 325                         base.OnViewLoaded(view);
 326                 }
 327
 328
 329                 #region Status Properties
 330
 331                 private string _statusMessage;
 332                 public string StatusMessage
 333                 {
 334                         get { return _statusMessage; }
 335                         set
 336                         {
 337                                 _statusMessage = value;
 338                                 NotifyOfPropertyChange(() => StatusMessage);
 339                         }
 340                 }
 341
 342                 private readonly ObservableConcurrentCollection<AccountInfo> _accounts = new ObservableConcurrentCollection<AccountInfo>();
 343                 public ObservableConcurrentCollection<AccountInfo> Accounts
 344                 {
 345                         get { return _accounts; }
 346                 }
 347
 348                 public bool HasAccounts
 349                 {
 350                         get { return _accounts.Count > 0; }
 351                 }
 352
 353
 354                 public string OpenFolderCaption
 355                 {
 356                         get
 357                         {
 358                                 return (_accounts.Count == 0)
 359                                                 ? "No Accounts Defined"
 360                                                 : "Open Pithos Folder";
 361                         }
 362                 }
 363
 364                 private string _pauseSyncCaption="Pause Synching";
 365                 public string PauseSyncCaption
 366                 {
 367                         get { return _pauseSyncCaption; }
 368                         set
 369                         {
 370                                 _pauseSyncCaption = value;
 371                                 NotifyOfPropertyChange(() => PauseSyncCaption);
 372                         }
 373                 }
 374
 375                 private readonly ObservableConcurrentCollection<FileEntry> _recentFiles = new ObservableConcurrentCollection<FileEntry>();
 376                 public ObservableConcurrentCollection<FileEntry> RecentFiles
 377                 {
 378                         get { return _recentFiles; }
 379                 }
 380
 381
 382                 private string _statusIcon="../Images/Pithos.ico";
 383                 public string StatusIcon
 384                 {
 385                         get { return _statusIcon; }
 386                         set
 387                         {
 388                                 //TODO: Ensure all status icons use the Pithos logo
 389                                 _statusIcon = value;
 390                                 NotifyOfPropertyChange(() => StatusIcon);
 391                         }
 392                 }
 393
 394                 #endregion
 395
 396                 #region Commands
 397
 398         public void ShowPreferences()
 399         {
 400             ShowPreferences(null);
 401         }
 402
 403                 public void ShowPreferences(string currentTab)
 404                 {
 405                         //Settings.Reload();
 406                     var preferences = new PreferencesViewModel(_windowManager, _events, this, Settings,currentTab);
 407                     _windowManager.ShowDialog(preferences);
 408
 409                 }
 410
 411                 public void AboutPithos()
 412                 {
 413                         var about = new AboutViewModel();
 414                         _windowManager.ShowWindow(about);
 415                 }
 416
 417                 public void SendFeedback()
 418                 {
 419                         var feedBack =  IoC.Get<FeedbackViewModel>();
 420                         _windowManager.ShowWindow(feedBack);
 421                 }
 422
 423                 //public PithosCommand OpenPithosFolderCommand { get; private set; }
 424
 425                 public void OpenPithosFolder()
 426                 {
 427                         var account = Settings.Accounts.FirstOrDefault(acc => acc.IsActive);
 428                         if (account == null)
 429                                 return;
 430                         Process.Start(account.RootPath);
 431                 }
 432
 433                 public void OpenPithosFolder(AccountInfo account)
 434                 {
 435                         Process.Start(account.AccountPath);
 436                 }
 437
 438
 439 /*
 440                 public void GoToSite()
 441                 {
 442                         var site = Properties.Settings.Default.PithosSite;
 443                         Process.Start(site);
 444                 }
 445 */
 446
 447                 public void GoToSite(AccountInfo account)
 448                 {
 449                     var uri = account.SiteUri.Replace("http://","https://");
 450                     Process.Start(uri);
 451                 }
 452
 453             private bool _statusVisible;
 454
 455             public string MiniStatusCaption
 456             {
 457                 get
 458                 {
 459                     return  _statusVisible ? "Hide Status Window" : "Show Status Window";
 460                 }
 461             }
 462
 463             public void ShowMiniStatus()
 464         {
 465             if (!_statusVisible)
 466                 _windowManager.ShowWindow(MiniStatus);
 467             else
 468             {
 469                 MiniStatus.TryClose();
 470             }
 471             _statusVisible=!_statusVisible;
 472
 473                 NotifyOfPropertyChange(()=>MiniStatusCaption);
 474         }
 475
 476             /// <summary>
 477         /// Open an explorer window to the target path's directory
 478         /// and select the file
 479         /// </summary>
 480         /// <param name="entry"></param>
 481         public void GoToFile(FileEntry entry)
 482         {
 483             var fullPath = entry.FullPath;
 484             if (!File.Exists(fullPath) && !Directory.Exists(fullPath))
 485                 return;
 486             Process.Start("explorer.exe","/select, " + fullPath);
 487         }
 488
 489         public void OpenLogPath()
 490         {
 491             var pithosDataPath = PithosSettings.PithosDataPath;
 492
 493             Process.Start(pithosDataPath);
 494         }
 495
 496         public void ShowFileProperties()
 497                 {
 498                         var account = Settings.Accounts.First(acc => acc.IsActive);
 499                         var dir = new DirectoryInfo(account.RootPath + @"\pithos");
 500                         var files=dir.GetFiles();
 501                         var r=new Random();
 502                         var idx=r.Next(0, files.Length);
 503                         ShowFileProperties(files[idx].FullName);
 504                 }
 505
 506                 public void ShowFileProperties(string filePath)
 507                 {
 508                         if (String.IsNullOrWhiteSpace(filePath))
 509                                 throw new ArgumentNullException("filePath");
 510                         if (!File.Exists(filePath) && !Directory.Exists(filePath))
 511                                 throw new ArgumentException(String.Format("Non existent file {0}",filePath),"filePath");
 512                         Contract.EndContractBlock();
 513
 514                         var pair=(from monitor in  Monitors
 515                                                            where filePath.StartsWith(monitor.Value.RootPath, StringComparison.InvariantCultureIgnoreCase)
 516                                                                    select monitor).FirstOrDefault();
 517                         var accountMonitor = pair.Value;
 518
 519                         if (accountMonitor == null)
 520                                 return;
 521
 522                         var infoTask=Task.Factory.StartNew(()=>accountMonitor.GetObjectInfo(filePath));
 523
 524
 525
 526                         var fileProperties = new FilePropertiesViewModel(this, infoTask,filePath);
 527                         _windowManager.ShowWindow(fileProperties);
 528                 }
 529
 530                 public void ShowContainerProperties()
 531                 {
 532                         var account = Settings.Accounts.First(acc => acc.IsActive);
 533                         var dir = new DirectoryInfo(account.RootPath);
 534                         var fullName = (from folder in dir.EnumerateDirectories()
 535                                                         where (folder.Attributes & FileAttributes.Hidden) == 0
 536                                                         select folder.FullName).First();
 537                         ShowContainerProperties(fullName);
 538                 }
 539
 540                 public void ShowContainerProperties(string filePath)
 541                 {
 542                         if (String.IsNullOrWhiteSpace(filePath))
 543                                 throw new ArgumentNullException("filePath");
 544                         if (!Directory.Exists(filePath))
 545                                 throw new ArgumentException(String.Format("Non existent file {0}",filePath),"filePath");
 546                         Contract.EndContractBlock();
 547
 548                         var pair=(from monitor in  Monitors
 549                                                            where filePath.StartsWith(monitor.Value.RootPath, StringComparison.InvariantCultureIgnoreCase)
 550                                                                    select monitor).FirstOrDefault();
 551                         var accountMonitor = pair.Value;
 552                         var info = accountMonitor.GetContainerInfo(filePath);
 553
 554
 555
 556                         var containerProperties = new ContainerPropertiesViewModel(this, info,filePath);
 557                         _windowManager.ShowWindow(containerProperties);
 558                 }
 559
 560                 public void SynchNow()
 561                 {
 562                         _pollAgent.SynchNow();
 563                 }
 564
 565                 public ObjectInfo RefreshObjectInfo(ObjectInfo currentInfo)
 566                 {
 567                         if (currentInfo==null)
 568                                 throw new ArgumentNullException("currentInfo");
 569                         Contract.EndContractBlock();
 570
 571                         var monitor = Monitors[currentInfo.Account];
 572                         var newInfo=monitor.CloudClient.GetObjectInfo(currentInfo.Account, currentInfo.Container, currentInfo.Name);
 573                         return newInfo;
 574                 }
 575
 576                 public ContainerInfo RefreshContainerInfo(ContainerInfo container)
 577                 {
 578                         if (container == null)
 579                                 throw new ArgumentNullException("container");
 580                         Contract.EndContractBlock();
 581
 582                         var monitor = Monitors[container.Account];
 583                         var newInfo = monitor.CloudClient.GetContainerInfo(container.Account, container.Name);
 584                         return newInfo;
 585                 }
 586
 587
 588                 public void ToggleSynching()
 589                 {
 590                         bool isPaused=false;
 591                         foreach (var pair in Monitors)
 592                         {
 593                                 var monitor = pair.Value;
 594                                 monitor.Pause = !monitor.Pause;
 595                                 isPaused = monitor.Pause;
 596                         }
 597
 598
 599                         PauseSyncCaption = isPaused ? "Resume syncing" : "Pause syncing";
 600                         var iconKey = isPaused? "TraySyncPaused" : "TrayInSynch";
 601                         StatusIcon = String.Format(@"../Images/{0}.ico", iconKey);
 602                 }
 603
 604                 public void ExitPithos()
 605                 {
 606                         foreach (var pair in Monitors)
 607                         {
 608                                 var monitor = pair.Value;
 609                                 monitor.Stop();
 610                         }
 611
 612                         ((Window)GetView()).Close();
 613                 }
 614                 #endregion
 615
 616
 617                 private readonly Dictionary<PithosStatus, StatusInfo> _iconNames = new List<StatusInfo>
 618                         {
 619                                 new StatusInfo(PithosStatus.InSynch, "All files up to date", "TrayInSynch"),
 620                                 new StatusInfo(PithosStatus.PollSyncing, "Polling Files", "TraySynching"),
 621                 new StatusInfo(PithosStatus.LocalSyncing, "Syncing Files", "TraySynching"),
 622                                 new StatusInfo(PithosStatus.SyncPaused, "Sync Paused", "TraySyncPaused")
 623                         }.ToDictionary(s => s.Status);
 624
 625                 readonly IWindowManager _windowManager;
 626
 627         //private int _syncCount=0;
 628
 629
 630         private PithosStatus _pithosStatus = PithosStatus.Disconnected;
 631
 632         public void SetPithosStatus(PithosStatus status)
 633         {
 634             if (_pithosStatus == PithosStatus.LocalSyncing && status == PithosStatus.PollComplete)
 635                 return;
 636             if (_pithosStatus == PithosStatus.PollSyncing && status == PithosStatus.LocalComplete)
 637                 return;
 638             if (status == PithosStatus.LocalComplete || status == PithosStatus.PollComplete)
 639                 _pithosStatus = PithosStatus.InSynch;
 640             else
 641                 _pithosStatus = status;
 642             UpdateStatus();
 643         }
 644
 645         public void SetPithosStatus(PithosStatus status,string message)
 646         {
 647             StatusMessage = message;
 648             SetPithosStatus(status);
 649         }
 650
 651
 652
 653                 ///<summary>
 654                 /// Updates the visual status indicators of the application depending on status changes, e.g. icon, stat
 655                 ///</summary>
 656                 public void UpdateStatus()
 657                 {
 658
 659                         if (_iconNames.ContainsKey(_pithosStatus))
 660                         {
 661                                 var info = _iconNames[_pithosStatus];
 662                                 StatusIcon = String.Format(@"../Images/{0}.ico", info.IconName);
 663                         }
 664
 665             if (_pithosStatus == PithosStatus.InSynch)
 666                 StatusMessage = "All files up to date";
 667                 }
 668
 669
 670
 671                 private Task StartMonitor(PithosMonitor monitor,int retries=0)
 672                 {
 673                         return Task.Factory.StartNew(() =>
 674                         {
 675                                 using (log4net.ThreadContext.Stacks["Monitor"].Push("Start"))
 676                                 {
 677                                         try
 678                                         {
 679                                                 Log.InfoFormat("Start Monitoring {0}", monitor.UserName);
 680
 681                                                 monitor.Start();
 682                                         }
 683                                         catch (WebException exc)
 684                                         {
 685                                                 if (AbandonRetry(monitor, retries))
 686                                                         return;
 687
 688                                                 HttpStatusCode statusCode =HttpStatusCode.OK;
 689                                                 var response = exc.Response as HttpWebResponse;
 690                                                 if(response!=null)
 691                                                         statusCode = response.StatusCode;
 692
 693                                                 switch (statusCode)
 694                                                 {
 695                                                         case HttpStatusCode.Unauthorized:
 696                                                                 var message = String.Format("API Key Expired for {0}. Starting Renewal",
 697                                                                                                                         monitor.UserName);
 698                                                                 Log.Error(message, exc);
 699                                                         var account = Settings.Accounts.Find(acc => acc.AccountName == monitor.UserName);
 700                                                         account.IsExpired = true;
 701                                 Notify(new ExpirationNotification(account));
 702                                                                 //TryAuthorize(monitor.UserName, retries).Wait();
 703                                                                 break;
 704                                                         case HttpStatusCode.ProxyAuthenticationRequired:
 705                                                                 TryAuthenticateProxy(monitor,retries);
 706                                                                 break;
 707                                                         default:
 708                                                                 TryLater(monitor, exc, retries);
 709                                                                 break;
 710                                                 }
 711                                         }
 712                                         catch (Exception exc)
 713                                         {
 714                                                 if (AbandonRetry(monitor, retries))
 715                                                         return;
 716
 717                                                 TryLater(monitor,exc,retries);
 718                                         }
 719                                 }
 720                         });
 721                 }
 722
 723                 private void TryAuthenticateProxy(PithosMonitor monitor,int retries)
 724                 {
 725                         Execute.OnUIThread(() =>
 726                                                                    {
 727                                                                            var proxyAccount = IoC.Get<ProxyAccountViewModel>();
 728                                                                                 proxyAccount.Settings = Settings;
 729                                                                            if (true != _windowManager.ShowDialog(proxyAccount))
 730                                                                                    return;
 731                                                                            StartMonitor(monitor, retries);
 732                                                                            NotifyOfPropertyChange(() => Accounts);
 733                                                                    });
 734                 }
 735
 736                 private bool AbandonRetry(PithosMonitor monitor, int retries)
 737                 {
 738                         if (retries > 1)
 739                         {
 740                                 var message = String.Format("Monitoring of account {0} has failed too many times. Will not retry",
 741                                                                                         monitor.UserName);
 742                                 _events.Publish(new Notification
 743                                                                         {Title = "Account monitoring failed", Message = message, Level = TraceLevel.Error});
 744                                 return true;
 745                         }
 746                         return false;
 747                 }
 748
 749
 750             private void TryLater(PithosMonitor monitor, Exception exc,int retries)
 751                 {
 752                         var message = String.Format("An exception occured. Can't start monitoring\nWill retry in 10 seconds");
 753                         Task.Factory.StartNewDelayed(10000, () => StartMonitor(monitor,retries+1));
 754                         _events.Publish(new Notification
 755                                                                 {Title = "Error", Message = message, Level = TraceLevel.Error});
 756                         Log.Error(message, exc);
 757                 }
 758
 759
 760                 public void NotifyChange(string status, TraceLevel level=TraceLevel.Info)
 761                 {
 762                         StatusMessage = status;
 763
 764                         _events.Publish(new Notification { Title = "Pithos", Message = status, Level = level });
 765                 }
 766
 767                 public void NotifyChangedFile(string filePath)
 768                 {
 769             if (RecentFiles.Any(e => e.FullPath == filePath))
 770                 return;
 771
 772                         IProducerConsumerCollection<FileEntry> files=RecentFiles;
 773                         FileEntry popped;
 774                         while (files.Count > 5)
 775                                 files.TryTake(out popped);
 776             var entry = new FileEntry { FullPath = filePath };
 777                         files.TryAdd(entry);
 778                 }
 779
 780                 public void NotifyAccount(AccountInfo account)
 781                 {
 782                         if (account== null)
 783                                 return;
 784                         //TODO: What happens to an existing account whose Token has changed?
 785                         account.SiteUri= String.Format("{0}/ui/?token={1}&user={2}",
 786                                 account.SiteUri, Uri.EscapeDataString(account.Token),
 787                                 Uri.EscapeDataString(account.UserName));
 788
 789                         if (Accounts.All(item => item.UserName != account.UserName))
 790                                 Accounts.TryAdd(account);
 791
 792                 }
 793
 794                 public void NotifyConflicts(IEnumerable<FileSystemInfo> conflictFiles, string message)
 795                 {
 796                         if (conflictFiles == null)
 797                                 return;
 798                     //Convert to list to avoid multiple iterations
 799             var files = conflictFiles.ToList();
 800                         if (files.Count==0)
 801                                 return;
 802
 803                         UpdateStatus();
 804                         //TODO: Create a more specific message. For now, just show a warning
 805                         NotifyForFiles(files,message,TraceLevel.Warning);
 806
 807                 }
 808
 809                 public void NotifyForFiles(IEnumerable<FileSystemInfo> files, string message,TraceLevel level=TraceLevel.Info)
 810                 {
 811                         if (files == null)
 812                                 return;
 813                         if (!files.Any())
 814                                 return;
 815
 816                         StatusMessage = message;
 817
 818                         _events.Publish(new Notification { Title = "Pithos", Message = message, Level = level});
 819                 }
 820
 821                 public void Notify(Notification notification)
 822                 {
 823                         _events.Publish(notification);
 824                 }
 825
 826
 827                 public void RemoveMonitor(string accountName)
 828                 {
 829                         if (String.IsNullOrWhiteSpace(accountName))
 830                                 return;
 831
 832                         var accountInfo=_accounts.FirstOrDefault(account => account.UserName == accountName);
 833             if (accountInfo != null)
 834             {
 835                 _accounts.TryRemove(accountInfo);
 836                 _pollAgent.RemoveAccount(accountInfo);
 837             }
 838
 839                     PithosMonitor monitor;
 840                         if (Monitors.TryRemove(accountName, out monitor))
 841                         {
 842                                 monitor.Stop();
 843                 //TODO: Also remove any pending actions for this account
 844                 //from the network queue
 845                         }
 846                 }
 847
 848                 public void RefreshOverlays()
 849                 {
 850                         foreach (var pair in Monitors)
 851                         {
 852                                 var monitor = pair.Value;
 853
 854                                 var path = monitor.RootPath;
 855
 856                                 if (String.IsNullOrWhiteSpace(path))
 857                                         continue;
 858
 859                                 if (!Directory.Exists(path) && !File.Exists(path))
 860                                         continue;
 861
 862                                 IntPtr pathPointer = Marshal.StringToCoTaskMemAuto(path);
 863
 864                                 try
 865                                 {
 866                                         NativeMethods.SHChangeNotify(HChangeNotifyEventID.SHCNE_UPDATEITEM,
 867                                                                                                  HChangeNotifyFlags.SHCNF_PATHW | HChangeNotifyFlags.SHCNF_FLUSHNOWAIT,
 868                                                                                                  pathPointer, IntPtr.Zero);
 869                                 }
 870                                 finally
 871                                 {
 872                                         Marshal.FreeHGlobal(pathPointer);
 873                                 }
 874                         }
 875                 }
 876
 877                 #region Event Handlers
 878
 879                 public void Handle(SelectiveSynchChanges message)
 880                 {
 881                         var accountName = message.Account.AccountName;
 882                         PithosMonitor monitor;
 883                         if (_monitors.TryGetValue(accountName, out monitor))
 884                         {
 885                                 monitor.SetSelectivePaths(message.Uris,message.Added,message.Removed);
 886
 887                         }
 888
 889                 }
 890
 891
 892                 private bool _pollStarted;
 893             private Sparkle _sparkle;
 894
 895             //SMELL: Doing so much work for notifications in the shell is wrong
 896                 //The notifications should be moved to their own view/viewmodel pair
 897                 //and different templates should be used for different message types
 898                 //This will also allow the addition of extra functionality, eg. actions
 899                 //
 900                 public void Handle(Notification notification)
 901                 {
 902                         UpdateStatus();
 903
 904                         if (!Settings.ShowDesktopNotifications)
 905                                 return;
 906
 907                         if (notification is PollNotification)
 908                         {
 909                                 _pollStarted = true;
 910                                 return;
 911                         }
 912                         if (notification is CloudNotification)
 913                         {
 914                                 if (!_pollStarted)
 915                                         return;
 916                                 _pollStarted= false;
 917                                 notification.Title = "Pithos";
 918                                 notification.Message = "Start Synchronisation";
 919                         }
 920
 921                     var deleteNotification = notification as CloudDeleteNotification;
 922             if (deleteNotification != null)
 923             {
 924                 StatusMessage = String.Format("Deleted {0}", deleteNotification.Data.Name);
 925                 return;
 926             }
 927
 928                     var progress = notification as ProgressNotification;
 929                     if (progress != null)
 930                     {
 931                         StatusMessage = String.Format("Pithos {0}\r\n{1} {2:p2} of {3} - {4}",
 932                                                       _fileVersion.Value.FileVersion,
 933                                               progress.Action,
 934                                                       progress.Block/(double)progress.TotalBlocks,
 935                                                       progress.FileSize.ToByteSize(),
 936                                                       progress.FileName);
 937                         return;
 938                     }
 939
 940                     var info = notification as StatusNotification;
 941             if (info != null)
 942             {
 943                 StatusMessage = String.Format("Pithos {0}\r\n{1}",
 944                                               _fileVersion.Value.FileVersion,
 945                                               info.Title);
 946                 return;
 947             }
 948                         if (String.IsNullOrWhiteSpace(notification.Message) && String.IsNullOrWhiteSpace(notification.Title))
 949                                 return;
 950
 951                         ShowBalloonFor(notification);
 952                 }
 953
 954             private void ShowBalloonFor(Notification notification)
 955             {
 956             Contract.Requires(notification!=null);
 957
 958             if (!Settings.ShowDesktopNotifications)
 959                 return;
 960
 961             BalloonIcon icon;
 962                 switch (notification.Level)
 963                 {
 964                     case TraceLevel.Info:
 965                     case TraceLevel.Verbose:
 966                         return;
 967                 case TraceLevel.Error:
 968                     icon = BalloonIcon.Error;
 969                     break;
 970                 case TraceLevel.Warning:
 971                         icon = BalloonIcon.Warning;
 972                         break;
 973                     default:
 974                         return;
 975                 }
 976
 977                 var tv = (ShellView) GetView();
 978                 System.Action clickAction = null;
 979                 if (notification is ExpirationNotification)
 980                 {
 981                     clickAction = () => ShowPreferences("AccountTab");
 982                 }
 983                 var balloon = new PithosBalloon
 984                                   {
 985                                       Title = notification.Title,
 986                                       Message = notification.Message,
 987                                       Icon = icon,
 988                                       ClickAction = clickAction
 989                                   };
 990                 tv.TaskbarView.ShowCustomBalloon(balloon, PopupAnimation.Fade, 4000);
 991             }
 992
 993             #endregion
 994
 995                 public void Handle(ShowFilePropertiesEvent message)
 996                 {
 997                         if (message == null)
 998                                 throw new ArgumentNullException("message");
 999                         if (String.IsNullOrWhiteSpace(message.FileName) )
1000                                 throw new ArgumentException("message");
1001                         Contract.EndContractBlock();
1002
1003                         var fileName = message.FileName;
1004                         //TODO: Display file properties for non-container folders
1005                         if (File.Exists(fileName))
1006                                 //Retrieve the full name with exact casing. Pithos names are case sensitive
1007                                 ShowFileProperties(FileInfoExtensions.GetProperFilePathCapitalization(fileName));
1008                         else if (Directory.Exists(fileName))
1009                                 //Retrieve the full name with exact casing. Pithos names are case sensitive
1010                         {
1011                                 var path = FileInfoExtensions.GetProperDirectoryCapitalization(fileName);
1012                                 if (IsContainer(path))
1013                                         ShowContainerProperties(path);
1014                                 else
1015                                         ShowFileProperties(path);
1016                         }
1017                 }
1018
1019                 private bool IsContainer(string path)
1020                 {
1021                         var matchingFolders = from account in _accounts
1022                                                                   from rootFolder in Directory.GetDirectories(account.AccountPath)
1023                                                                   where rootFolder.Equals(path, StringComparison.InvariantCultureIgnoreCase)
1024                                                                   select rootFolder;
1025                         return matchingFolders.Any();
1026                 }
1027
1028                 public FileStatus GetFileStatus(string localFileName)
1029                 {
1030                         if (String.IsNullOrWhiteSpace(localFileName))
1031                                 throw new ArgumentNullException("localFileName");
1032                         Contract.EndContractBlock();
1033
1034                         var statusKeeper = IoC.Get<IStatusKeeper>();
1035                         var status=statusKeeper.GetFileStatus(localFileName);
1036                         return status;
1037                 }
1038
1039             public void RemoveAccountFromDatabase(AccountSettings account)
1040             {
1041             var statusKeeper = IoC.Get<IStatusKeeper>();
1042             statusKeeper.ClearFolderStatus(account.RootPath);
1043             }
1044         }
1045 }