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