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