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             /// <summary>
 438         /// Open an explorer window to the target path's directory
 439         /// and select the file
 440         /// </summary>
 441         /// <param name="entry"></param>
 442         public void GoToFile(FileEntry entry)
 443         {
 444             var fullPath = entry.FullPath;
 445             if (!File.Exists(fullPath) && !Directory.Exists(fullPath))
 446                 return;
 447             Process.Start("explorer.exe","/select, " + fullPath);
 448         }
 449
 450         public void OpenLogPath()
 451         {
 452             var appDataPath = Environment.GetFolderPath(Environment.SpecialFolder.LocalApplicationData);
 453             var pithosDataPath = Path.Combine(appDataPath, "GRNET");
 454
 455             Process.Start(pithosDataPath);
 456         }
 457
 458         public void ShowFileProperties()
 459                 {
 460                         var account = Settings.Accounts.First(acc => acc.IsActive);
 461                         var dir = new DirectoryInfo(account.RootPath + @"\pithos");
 462                         var files=dir.GetFiles();
 463                         var r=new Random();
 464                         var idx=r.Next(0, files.Length);
 465                         ShowFileProperties(files[idx].FullName);
 466                 }
 467
 468                 public void ShowFileProperties(string filePath)
 469                 {
 470                         if (String.IsNullOrWhiteSpace(filePath))
 471                                 throw new ArgumentNullException("filePath");
 472                         if (!File.Exists(filePath) && !Directory.Exists(filePath))
 473                                 throw new ArgumentException(String.Format("Non existent file {0}",filePath),"filePath");
 474                         Contract.EndContractBlock();
 475
 476                         var pair=(from monitor in  Monitors
 477                                                            where filePath.StartsWith(monitor.Value.RootPath, StringComparison.InvariantCultureIgnoreCase)
 478                                                                    select monitor).FirstOrDefault();
 479                         var accountMonitor = pair.Value;
 480
 481                         if (accountMonitor == null)
 482                                 return;
 483
 484                         var infoTask=Task.Factory.StartNew(()=>accountMonitor.GetObjectInfo(filePath));
 485
 486
 487
 488                         var fileProperties = new FilePropertiesViewModel(this, infoTask,filePath);
 489                         _windowManager.ShowWindow(fileProperties);
 490                 }
 491
 492                 public void ShowContainerProperties()
 493                 {
 494                         var account = Settings.Accounts.First(acc => acc.IsActive);
 495                         var dir = new DirectoryInfo(account.RootPath);
 496                         var fullName = (from folder in dir.EnumerateDirectories()
 497                                                         where (folder.Attributes & FileAttributes.Hidden) == 0
 498                                                         select folder.FullName).First();
 499                         ShowContainerProperties(fullName);
 500                 }
 501
 502                 public void ShowContainerProperties(string filePath)
 503                 {
 504                         if (String.IsNullOrWhiteSpace(filePath))
 505                                 throw new ArgumentNullException("filePath");
 506                         if (!Directory.Exists(filePath))
 507                                 throw new ArgumentException(String.Format("Non existent file {0}",filePath),"filePath");
 508                         Contract.EndContractBlock();
 509
 510                         var pair=(from monitor in  Monitors
 511                                                            where filePath.StartsWith(monitor.Value.RootPath, StringComparison.InvariantCultureIgnoreCase)
 512                                                                    select monitor).FirstOrDefault();
 513                         var accountMonitor = pair.Value;
 514                         var info = accountMonitor.GetContainerInfo(filePath);
 515
 516
 517
 518                         var containerProperties = new ContainerPropertiesViewModel(this, info,filePath);
 519                         _windowManager.ShowWindow(containerProperties);
 520                 }
 521
 522                 public void SynchNow()
 523                 {
 524                         _pollAgent.SynchNow();
 525                 }
 526
 527                 public ObjectInfo RefreshObjectInfo(ObjectInfo currentInfo)
 528                 {
 529                         if (currentInfo==null)
 530                                 throw new ArgumentNullException("currentInfo");
 531                         Contract.EndContractBlock();
 532
 533                         var monitor = Monitors[currentInfo.Account];
 534                         var newInfo=monitor.CloudClient.GetObjectInfo(currentInfo.Account, currentInfo.Container, currentInfo.Name);
 535                         return newInfo;
 536                 }
 537
 538                 public ContainerInfo RefreshContainerInfo(ContainerInfo container)
 539                 {
 540                         if (container == null)
 541                                 throw new ArgumentNullException("container");
 542                         Contract.EndContractBlock();
 543
 544                         var monitor = Monitors[container.Account];
 545                         var newInfo = monitor.CloudClient.GetContainerInfo(container.Account, container.Name);
 546                         return newInfo;
 547                 }
 548
 549
 550                 public void ToggleSynching()
 551                 {
 552                         bool isPaused=false;
 553                         foreach (var pair in Monitors)
 554                         {
 555                                 var monitor = pair.Value;
 556                                 monitor.Pause = !monitor.Pause;
 557                                 isPaused = monitor.Pause;
 558                         }
 559
 560
 561                         PauseSyncCaption = isPaused ? "Resume syncing" : "Pause syncing";
 562                         var iconKey = isPaused? "TraySyncPaused" : "TrayInSynch";
 563                         StatusIcon = String.Format(@"../Images/{0}.ico", iconKey);
 564                 }
 565
 566                 public void ExitPithos()
 567                 {
 568                         foreach (var pair in Monitors)
 569                         {
 570                                 var monitor = pair.Value;
 571                                 monitor.Stop();
 572                         }
 573
 574                         ((Window)GetView()).Close();
 575                 }
 576                 #endregion
 577
 578
 579                 private readonly Dictionary<PithosStatus, StatusInfo> _iconNames = new List<StatusInfo>
 580                         {
 581                                 new StatusInfo(PithosStatus.InSynch, "All files up to date", "TrayInSynch"),
 582                                 new StatusInfo(PithosStatus.PollSyncing, "Polling Files", "TraySynching"),
 583                 new StatusInfo(PithosStatus.LocalSyncing, "Syncing Files", "TraySynching"),
 584                                 new StatusInfo(PithosStatus.SyncPaused, "Sync Paused", "TraySyncPaused")
 585                         }.ToDictionary(s => s.Status);
 586
 587                 readonly IWindowManager _windowManager;
 588
 589         //private int _syncCount=0;
 590
 591
 592         private PithosStatus _pithosStatus = PithosStatus.Disconnected;
 593
 594         public void SetPithosStatus(PithosStatus status)
 595         {
 596             if (_pithosStatus == PithosStatus.LocalSyncing && status == PithosStatus.PollComplete)
 597                 return;
 598             if (_pithosStatus == PithosStatus.PollSyncing && status == PithosStatus.LocalComplete)
 599                 return;
 600             if (status == PithosStatus.LocalComplete || status == PithosStatus.PollComplete)
 601                 _pithosStatus = PithosStatus.InSynch;
 602             else
 603                 _pithosStatus = status;
 604             UpdateStatus();
 605         }
 606
 607         public void SetPithosStatus(PithosStatus status,string message)
 608         {
 609             StatusMessage = message;
 610             SetPithosStatus(status);
 611         }
 612
 613
 614
 615                 ///<summary>
 616                 /// Updates the visual status indicators of the application depending on status changes, e.g. icon, stat
 617                 ///</summary>
 618                 public void UpdateStatus()
 619                 {
 620
 621                         if (_iconNames.ContainsKey(_pithosStatus))
 622                         {
 623                                 var info = _iconNames[_pithosStatus];
 624                                 StatusIcon = String.Format(@"../Images/{0}.ico", info.IconName);
 625                         }
 626
 627             if (_pithosStatus == PithosStatus.InSynch)
 628                 StatusMessage = "All files up to date";
 629                 }
 630
 631
 632
 633                 private Task StartMonitor(PithosMonitor monitor,int retries=0)
 634                 {
 635                         return Task.Factory.StartNew(() =>
 636                         {
 637                                 using (log4net.ThreadContext.Stacks["Monitor"].Push("Start"))
 638                                 {
 639                                         try
 640                                         {
 641                                                 Log.InfoFormat("Start Monitoring {0}", monitor.UserName);
 642
 643                                                 monitor.Start();
 644                                         }
 645                                         catch (WebException exc)
 646                                         {
 647                                                 if (AbandonRetry(monitor, retries))
 648                                                         return;
 649
 650                                                 HttpStatusCode statusCode =HttpStatusCode.OK;
 651                                                 var response = exc.Response as HttpWebResponse;
 652                                                 if(response!=null)
 653                                                         statusCode = response.StatusCode;
 654
 655                                                 switch (statusCode)
 656                                                 {
 657                                                         case HttpStatusCode.Unauthorized:
 658                                                                 var message = String.Format("API Key Expired for {0}. Starting Renewal",
 659                                                                                                                         monitor.UserName);
 660                                                                 Log.Error(message, exc);
 661                                                         var account = Settings.Accounts.Find(acc => acc.AccountName == monitor.UserName);
 662                                                         account.IsExpired = true;
 663                                 Notify(new ExpirationNotification(account));
 664                                                                 //TryAuthorize(monitor.UserName, retries).Wait();
 665                                                                 break;
 666                                                         case HttpStatusCode.ProxyAuthenticationRequired:
 667                                                                 TryAuthenticateProxy(monitor,retries);
 668                                                                 break;
 669                                                         default:
 670                                                                 TryLater(monitor, exc, retries);
 671                                                                 break;
 672                                                 }
 673                                         }
 674                                         catch (Exception exc)
 675                                         {
 676                                                 if (AbandonRetry(monitor, retries))
 677                                                         return;
 678
 679                                                 TryLater(monitor,exc,retries);
 680                                         }
 681                                 }
 682                         });
 683                 }
 684
 685                 private void TryAuthenticateProxy(PithosMonitor monitor,int retries)
 686                 {
 687                         Execute.OnUIThread(() =>
 688                                                                    {
 689                                                                            var proxyAccount = IoC.Get<ProxyAccountViewModel>();
 690                                                                                 proxyAccount.Settings = Settings;
 691                                                                            if (true != _windowManager.ShowDialog(proxyAccount))
 692                                                                                    return;
 693                                                                            StartMonitor(monitor, retries);
 694                                                                            NotifyOfPropertyChange(() => Accounts);
 695                                                                    });
 696                 }
 697
 698                 private bool AbandonRetry(PithosMonitor monitor, int retries)
 699                 {
 700                         if (retries > 1)
 701                         {
 702                                 var message = String.Format("Monitoring of account {0} has failed too many times. Will not retry",
 703                                                                                         monitor.UserName);
 704                                 _events.Publish(new Notification
 705                                                                         {Title = "Account monitoring failed", Message = message, Level = TraceLevel.Error});
 706                                 return true;
 707                         }
 708                         return false;
 709                 }
 710
 711
 712             private void TryLater(PithosMonitor monitor, Exception exc,int retries)
 713                 {
 714                         var message = String.Format("An exception occured. Can't start monitoring\nWill retry in 10 seconds");
 715                         Task.Factory.StartNewDelayed(10000, () => StartMonitor(monitor,retries+1));
 716                         _events.Publish(new Notification
 717                                                                 {Title = "Error", Message = message, Level = TraceLevel.Error});
 718                         Log.Error(message, exc);
 719                 }
 720
 721
 722                 public void NotifyChange(string status, TraceLevel level=TraceLevel.Info)
 723                 {
 724                         StatusMessage = status;
 725
 726                         _events.Publish(new Notification { Title = "Pithos", Message = status, Level = level });
 727                 }
 728
 729                 public void NotifyChangedFile(string filePath)
 730                 {
 731             if (RecentFiles.Any(e => e.FullPath == filePath))
 732                 return;
 733
 734                         IProducerConsumerCollection<FileEntry> files=RecentFiles;
 735                         FileEntry popped;
 736                         while (files.Count > 5)
 737                                 files.TryTake(out popped);
 738             var entry = new FileEntry { FullPath = filePath };
 739                         files.TryAdd(entry);
 740                 }
 741
 742                 public void NotifyAccount(AccountInfo account)
 743                 {
 744                         if (account== null)
 745                                 return;
 746                         //TODO: What happens to an existing account whose Token has changed?
 747                         account.SiteUri= String.Format("{0}/ui/?token={1}&user={2}",
 748                                 account.SiteUri, Uri.EscapeDataString(account.Token),
 749                                 Uri.EscapeDataString(account.UserName));
 750
 751                         if (Accounts.All(item => item.UserName != account.UserName))
 752                                 Accounts.TryAdd(account);
 753
 754                 }
 755
 756                 public void NotifyConflicts(IEnumerable<FileSystemInfo> conflictFiles, string message)
 757                 {
 758                         if (conflictFiles == null)
 759                                 return;
 760                     //Convert to list to avoid multiple iterations
 761             var files = conflictFiles.ToList();
 762                         if (files.Count==0)
 763                                 return;
 764
 765                         UpdateStatus();
 766                         //TODO: Create a more specific message. For now, just show a warning
 767                         NotifyForFiles(files,message,TraceLevel.Warning);
 768
 769                 }
 770
 771                 public void NotifyForFiles(IEnumerable<FileSystemInfo> files, string message,TraceLevel level=TraceLevel.Info)
 772                 {
 773                         if (files == null)
 774                                 return;
 775                         if (!files.Any())
 776                                 return;
 777
 778                         StatusMessage = message;
 779
 780                         _events.Publish(new Notification { Title = "Pithos", Message = message, Level = level});
 781                 }
 782
 783                 public void Notify(Notification notification)
 784                 {
 785                         _events.Publish(notification);
 786                 }
 787
 788
 789                 public void RemoveMonitor(string accountName)
 790                 {
 791                         if (String.IsNullOrWhiteSpace(accountName))
 792                                 return;
 793
 794                         var accountInfo=_accounts.FirstOrDefault(account => account.UserName == accountName);
 795             if (accountInfo != null)
 796             {
 797                 _accounts.TryRemove(accountInfo);
 798                 _pollAgent.RemoveAccount(accountInfo);
 799             }
 800
 801                     PithosMonitor monitor;
 802                         if (Monitors.TryRemove(accountName, out monitor))
 803                         {
 804                                 monitor.Stop();
 805                 //TODO: Also remove any pending actions for this account
 806                 //from the network queue
 807                         }
 808                 }
 809
 810                 public void RefreshOverlays()
 811                 {
 812                         foreach (var pair in Monitors)
 813                         {
 814                                 var monitor = pair.Value;
 815
 816                                 var path = monitor.RootPath;
 817
 818                                 if (String.IsNullOrWhiteSpace(path))
 819                                         continue;
 820
 821                                 if (!Directory.Exists(path) && !File.Exists(path))
 822                                         continue;
 823
 824                                 IntPtr pathPointer = Marshal.StringToCoTaskMemAuto(path);
 825
 826                                 try
 827                                 {
 828                                         NativeMethods.SHChangeNotify(HChangeNotifyEventID.SHCNE_UPDATEITEM,
 829                                                                                                  HChangeNotifyFlags.SHCNF_PATHW | HChangeNotifyFlags.SHCNF_FLUSHNOWAIT,
 830                                                                                                  pathPointer, IntPtr.Zero);
 831                                 }
 832                                 finally
 833                                 {
 834                                         Marshal.FreeHGlobal(pathPointer);
 835                                 }
 836                         }
 837                 }
 838
 839                 #region Event Handlers
 840
 841                 public void Handle(SelectiveSynchChanges message)
 842                 {
 843                         var accountName = message.Account.AccountName;
 844                         PithosMonitor monitor;
 845                         if (_monitors.TryGetValue(accountName, out monitor))
 846                         {
 847                                 monitor.SetSelectivePaths(message.Uris,message.Added,message.Removed);
 848
 849                         }
 850
 851                 }
 852
 853
 854                 private bool _pollStarted;
 855             private Sparkle _sparkle;
 856
 857             //SMELL: Doing so much work for notifications in the shell is wrong
 858                 //The notifications should be moved to their own view/viewmodel pair
 859                 //and different templates should be used for different message types
 860                 //This will also allow the addition of extra functionality, eg. actions
 861                 //
 862                 public void Handle(Notification notification)
 863                 {
 864                         UpdateStatus();
 865
 866                         if (!Settings.ShowDesktopNotifications)
 867                                 return;
 868
 869                         if (notification is PollNotification)
 870                         {
 871                                 _pollStarted = true;
 872                                 return;
 873                         }
 874                         if (notification is CloudNotification)
 875                         {
 876                                 if (!_pollStarted)
 877                                         return;
 878                                 _pollStarted= false;
 879                                 notification.Title = "Pithos";
 880                                 notification.Message = "Start Synchronisation";
 881                         }
 882
 883                     var progress = notification as ProgressNotification;
 884                     if (progress != null)
 885                     {
 886                         StatusMessage = String.Format("Pithos {0}\r\n{1} {2:p2} of {3} - {4}",
 887                                                       _fileVersion.Value.FileVersion,
 888                                               progress.Action,
 889                                                       progress.Block/(double)progress.TotalBlocks,
 890                                                       progress.FileSize.ToByteSize(),
 891                                                       progress.FileName);
 892                         return;
 893                     }
 894
 895                     var info = notification as StatusNotification;
 896             if (info != null)
 897             {
 898                 StatusMessage = String.Format("Pithos {0}\r\n{1}",
 899                                               _fileVersion.Value.FileVersion,
 900                                               info.Title);
 901                 return;
 902             }
 903                         if (String.IsNullOrWhiteSpace(notification.Message) && String.IsNullOrWhiteSpace(notification.Title))
 904                                 return;
 905
 906                         ShowBalloonFor(notification);
 907                 }
 908
 909             private void ShowBalloonFor(Notification notification)
 910             {
 911             Contract.Requires(notification!=null);
 912
 913             if (!Settings.ShowDesktopNotifications)
 914                 return;
 915
 916             BalloonIcon icon;
 917                 switch (notification.Level)
 918                 {
 919                     case TraceLevel.Info:
 920                     case TraceLevel.Verbose:
 921                         return;
 922                 case TraceLevel.Error:
 923                     icon = BalloonIcon.Error;
 924                     break;
 925                 case TraceLevel.Warning:
 926                         icon = BalloonIcon.Warning;
 927                         break;
 928                     default:
 929                         return;
 930                 }
 931
 932                 var tv = (ShellView) GetView();
 933                 System.Action clickAction = null;
 934                 if (notification is ExpirationNotification)
 935                 {
 936                     clickAction = () => ShowPreferences("AccountTab");
 937                 }
 938                 var balloon = new PithosBalloon
 939                                   {
 940                                       Title = notification.Title,
 941                                       Message = notification.Message,
 942                                       Icon = icon,
 943                                       ClickAction = clickAction
 944                                   };
 945                 tv.TaskbarView.ShowCustomBalloon(balloon, PopupAnimation.Fade, 4000);
 946             }
 947
 948             #endregion
 949
 950                 public void Handle(ShowFilePropertiesEvent message)
 951                 {
 952                         if (message == null)
 953                                 throw new ArgumentNullException("message");
 954                         if (String.IsNullOrWhiteSpace(message.FileName) )
 955                                 throw new ArgumentException("message");
 956                         Contract.EndContractBlock();
 957
 958                         var fileName = message.FileName;
 959                         //TODO: Display file properties for non-container folders
 960                         if (File.Exists(fileName))
 961                                 //Retrieve the full name with exact casing. Pithos names are case sensitive
 962                                 ShowFileProperties(FileInfoExtensions.GetProperFilePathCapitalization(fileName));
 963                         else if (Directory.Exists(fileName))
 964                                 //Retrieve the full name with exact casing. Pithos names are case sensitive
 965                         {
 966                                 var path = FileInfoExtensions.GetProperDirectoryCapitalization(fileName);
 967                                 if (IsContainer(path))
 968                                         ShowContainerProperties(path);
 969                                 else
 970                                         ShowFileProperties(path);
 971                         }
 972                 }
 973
 974                 private bool IsContainer(string path)
 975                 {
 976                         var matchingFolders = from account in _accounts
 977                                                                   from rootFolder in Directory.GetDirectories(account.AccountPath)
 978                                                                   where rootFolder.Equals(path, StringComparison.InvariantCultureIgnoreCase)
 979                                                                   select rootFolder;
 980                         return matchingFolders.Any();
 981                 }
 982
 983                 public FileStatus GetFileStatus(string localFileName)
 984                 {
 985                         if (String.IsNullOrWhiteSpace(localFileName))
 986                                 throw new ArgumentNullException("localFileName");
 987                         Contract.EndContractBlock();
 988
 989                         var statusKeeper = IoC.Get<IStatusKeeper>();
 990                         var status=statusKeeper.GetFileStatus(localFileName);
 991                         return status;
 992                 }
 993
 994             public void RemoveAccountFromDatabase(AccountSettings account)
 995             {
 996             var statusKeeper = IoC.Get<IStatusKeeper>();
 997             statusKeeper.ClearFolderStatus(account.RootPath);
 998             }
 999         }
1000 }