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#region
2
/* -----------------------------------------------------------------------
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 * <copyright file="ShellViewModel.cs" company="GRNet">
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 * 
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 * Copyright 2011-2012 GRNET S.A. All rights reserved.
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 *
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 * Redistribution and use in source and binary forms, with or
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 * without modification, are permitted provided that the following
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 * conditions are met:
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 *
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 *   1. Redistributions of source code must retain the above
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 *      copyright notice, this list of conditions and the following
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 *      disclaimer.
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 *
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 *   2. Redistributions in binary form must reproduce the above
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 *      copyright notice, this list of conditions and the following
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 *      disclaimer in the documentation and/or other materials
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 *      provided with the distribution.
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 *
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 *
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 * THIS SOFTWARE IS PROVIDED BY GRNET S.A. ``AS IS'' AND ANY EXPRESS
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 * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
23
 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL GRNET S.A OR
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 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
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 * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
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 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
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 * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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 * POSSIBILITY OF SUCH DAMAGE.
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 *
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 * The views and conclusions contained in the software and
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 * documentation are those of the authors and should not be
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 * interpreted as representing official policies, either expressed
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 * or implied, of GRNET S.A.
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 * </copyright>
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 * -----------------------------------------------------------------------
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 */
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#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
		//The Status Checker provides the current synch state
91
		//TODO: Could we remove the status checker and use events in its place?
92
		private readonly IStatusChecker _statusChecker;
93
		private readonly IEventAggregator _events;
94

    
95
		public PithosSettings Settings { get; private set; }
96

    
97

    
98
		private readonly ConcurrentDictionary<string, PithosMonitor> _monitors = new ConcurrentDictionary<string, PithosMonitor>();
99
		///<summary>
100
		/// Dictionary of account monitors, keyed by account
101
		///</summary>
102
		///<remarks>
103
		/// One monitor class is created for each account. The Shell needs access to the monitors to execute start/stop/pause commands,
104
		/// retrieve account and boject info		
105
		///</remarks>
106
		// TODO: Does the Shell REALLY need access to the monitors? Could we achieve the same results with a better design?
107
		// TODO: The monitors should be internal to Pithos.Core, even though exposing them makes coding of the Object and Container windows easier
108
		public ConcurrentDictionary<string, PithosMonitor> Monitors
109
		{
110
			get { return _monitors; }
111
		}
112

    
113

    
114
		///<summary>
115
		/// The status service is used by Shell extensions to retrieve file status information
116
		///</summary>
117
		//TODO: CODE SMELL! This is the shell! While hosting in the shell makes executing start/stop commands easier, it is still a smell
118
		private ServiceHost _statusService;
119

    
120
		//Logging in the Pithos client is provided by log4net
121
		private static readonly log4net.ILog Log = log4net.LogManager.GetLogger("Pithos");
122

    
123
		//Lazily initialized File Version info. This is done once and lazily to avoid blocking the UI
124
		private readonly Lazy<FileVersionInfo> _fileVersion;
125

    
126
	    private readonly PollAgent _pollAgent;
127

    
128
		///<summary>
129
		/// The Shell depends on MEF to provide implementations for windowManager, events, the status checker service and the settings
130
		///</summary>
131
		///<remarks>
132
		/// The PithosSettings class encapsulates the app's settings to abstract their storage mechanism (App settings, a database or registry)
133
		///</remarks>
134
		[ImportingConstructor]		
135
		public ShellViewModel(IWindowManager windowManager, IEventAggregator events, IStatusChecker statusChecker, PithosSettings settings,PollAgent pollAgent)
136
		{
137
			try
138
			{
139

    
140
				_windowManager = windowManager;
141
				//CHECK: Caliburn doesn't need explicit command construction
142
				//OpenPithosFolderCommand = new PithosCommand(OpenPithosFolder);
143
				_statusChecker = statusChecker;
144
				//The event subst
145
				_events = events;
146
				_events.Subscribe(this);
147

    
148
			    _pollAgent = pollAgent;
149
				Settings = settings;
150

    
151
				Proxy.SetFromSettings(settings);
152

    
153
				StatusMessage = "In Synch";
154

    
155
				_fileVersion=  new Lazy<FileVersionInfo>(() =>
156
				{
157
					Assembly assembly = Assembly.GetExecutingAssembly();
158
					var fileVersion = FileVersionInfo.GetVersionInfo(assembly.Location);
159
					return fileVersion;
160
				});
161
				_accounts.CollectionChanged += (sender, e) =>
162
												   {
163
													   NotifyOfPropertyChange(() => OpenFolderCaption);
164
													   NotifyOfPropertyChange(() => HasAccounts);
165
												   };
166

    
167
			}
168
			catch (Exception exc)
169
			{
170
				Log.Error("Error while starting the ShellViewModel",exc);
171
				throw;
172
			}
173
		}
174

    
175

    
176
		protected override void OnActivate()
177
		{
178
			base.OnActivate();
179

    
180
			
181

    
182
			StartMonitoring();                    
183
		}
184

    
185

    
186

    
187
		private async void StartMonitoring()
188
		{
189
			try
190
			{
191
				var accounts = Settings.Accounts.Select(MonitorAccount);
192
				await TaskEx.WhenAll(accounts);
193
				_statusService = StatusService.Start();
194

    
195
/*
196
				foreach (var account in Settings.Accounts)
197
				{
198
					await MonitorAccount(account);
199
				}
200
*/
201
				
202
			}
203
			catch (AggregateException exc)
204
			{
205
				exc.Handle(e =>
206
				{
207
					Log.Error("Error while starting monitoring", e);
208
					return true;
209
				});
210
				throw;
211
			}
212
		}
213

    
214
		protected override void OnDeactivate(bool close)
215
		{
216
			base.OnDeactivate(close);
217
			if (close)
218
			{
219
				StatusService.Stop(_statusService);
220
				_statusService = null;
221
			}
222
		}
223

    
224
		public Task MonitorAccount(AccountSettings account)
225
		{
226
			return Task.Factory.StartNew(() =>
227
			{                                                
228
				PithosMonitor monitor;
229
				var accountName = account.AccountName;
230

    
231
				if (_monitors.TryGetValue(accountName, out monitor))
232
				{
233
					//If the account is active
234
                    if (account.IsActive)
235
                    {
236
                        //The Api Key may have changed throuth the Preferences dialog
237
                        monitor.ApiKey = account.ApiKey;
238
						Debug.Assert(monitor.StatusNotification == this,"An existing monitor should already have a StatusNotification service object");
239
                        monitor.RootPath = account.RootPath;
240
                        //Start the monitor. It's OK to start an already started monitor,
241
                        //it will just ignore the call                        
242
                        StartMonitor(monitor).Wait();
243
                    }
244
                    else
245
                    {
246
                        //If the account is inactive
247
                        //Stop and remove the monitor
248
                        RemoveMonitor(accountName);
249
                    }
250
					return;
251
				}
252

    
253
				
254
				//Create a new monitor/ Can't use MEF here, it would return a single instance for all monitors
255
				monitor = new PithosMonitor
256
							  {
257
								  UserName = accountName,
258
								  ApiKey = account.ApiKey,                                  
259
								  StatusNotification = this,
260
								  RootPath = account.RootPath
261
							  };
262
				//PithosMonitor uses MEF so we need to resolve it
263
				IoC.BuildUp(monitor);
264

    
265
				monitor.AuthenticationUrl = account.ServerUrl;
266

    
267
				_monitors[accountName] = monitor;
268

    
269
				if (account.IsActive)
270
				{
271
					//Don't start a monitor if it doesn't have an account and ApiKey
272
					if (String.IsNullOrWhiteSpace(monitor.UserName) ||
273
						String.IsNullOrWhiteSpace(monitor.ApiKey))
274
						return;
275
					StartMonitor(monitor);
276
				}
277
			});
278
		}
279

    
280

    
281
		protected override void OnViewLoaded(object view)
282
		{
283
			UpdateStatus();
284
			var window = (Window)view;            
285
			TaskEx.Delay(1000).ContinueWith(t => Execute.OnUIThread(window.Hide));
286
			base.OnViewLoaded(view);
287
		}
288

    
289

    
290
		#region Status Properties
291

    
292
		private string _statusMessage;
293
		public string StatusMessage
294
		{
295
			get { return _statusMessage; }
296
			set
297
			{
298
				_statusMessage = value;
299
				NotifyOfPropertyChange(() => StatusMessage);
300
			}
301
		}
302

    
303
		private readonly ObservableConcurrentCollection<AccountInfo> _accounts = new ObservableConcurrentCollection<AccountInfo>();
304
		public ObservableConcurrentCollection<AccountInfo> Accounts
305
		{
306
			get { return _accounts; }
307
		}
308

    
309
		public bool HasAccounts
310
		{
311
			get { return _accounts.Count > 0; }
312
		}
313

    
314

    
315
		public string OpenFolderCaption
316
		{
317
			get
318
			{
319
				return (_accounts.Count == 0)
320
						? "No Accounts Defined"
321
						: "Open Pithos Folder";
322
			}
323
		}
324

    
325
		private string _pauseSyncCaption="Pause Synching";
326
		public string PauseSyncCaption
327
		{
328
			get { return _pauseSyncCaption; }
329
			set
330
			{
331
				_pauseSyncCaption = value;
332
				NotifyOfPropertyChange(() => PauseSyncCaption);
333
			}
334
		}
335

    
336
		private readonly ObservableConcurrentCollection<FileEntry> _recentFiles = new ObservableConcurrentCollection<FileEntry>();
337
		public ObservableConcurrentCollection<FileEntry> RecentFiles
338
		{
339
			get { return _recentFiles; }
340
		}
341

    
342

    
343
		private string _statusIcon="../Images/Pithos.ico";
344
		public string StatusIcon
345
		{
346
			get { return _statusIcon; }
347
			set
348
			{
349
				//TODO: Ensure all status icons use the Pithos logo
350
				_statusIcon = value;
351
				NotifyOfPropertyChange(() => StatusIcon);
352
			}
353
		}
354

    
355
		#endregion
356

    
357
		#region Commands
358

    
359
        public void ShowPreferences()
360
        {
361
            ShowPreferences(null);
362
        }
363

    
364
		public void ShowPreferences(string currentTab)
365
		{
366
			//Settings.Reload();
367
		    var preferences = new PreferencesViewModel(_windowManager, _events, this, Settings,currentTab);
368
		    _windowManager.ShowDialog(preferences);
369
			
370
		}
371

    
372
		public void AboutPithos()
373
		{
374
			var about = new AboutViewModel();
375
			_windowManager.ShowWindow(about);
376
		}
377

    
378
		public void SendFeedback()
379
		{
380
			var feedBack =  IoC.Get<FeedbackViewModel>();
381
			_windowManager.ShowWindow(feedBack);
382
		}
383

    
384
		//public PithosCommand OpenPithosFolderCommand { get; private set; }
385

    
386
		public void OpenPithosFolder()
387
		{
388
			var account = Settings.Accounts.FirstOrDefault(acc => acc.IsActive);
389
			if (account == null)
390
				return;
391
			Process.Start(account.RootPath);
392
		}
393

    
394
		public void OpenPithosFolder(AccountInfo account)
395
		{
396
			Process.Start(account.AccountPath);
397
		}
398

    
399
		
400
/*
401
		public void GoToSite()
402
		{            
403
			var site = Properties.Settings.Default.PithosSite;
404
			Process.Start(site);            
405
		}
406
*/
407

    
408
		public void GoToSite(AccountInfo account)
409
		{
410
			Process.Start(account.SiteUri);
411
		}
412

    
413
        /// <summary>
414
        /// Open an explorer window to the target path's directory
415
        /// and select the file
416
        /// </summary>
417
        /// <param name="entry"></param>
418
        public void GoToFile(FileEntry entry)
419
        {
420
            var fullPath = entry.FullPath;
421
            if (!File.Exists(fullPath) && !Directory.Exists(fullPath))
422
                return;
423
            Process.Start("explorer.exe","/select, " + fullPath);
424
        }
425

    
426
		public void ShowFileProperties()
427
		{
428
			var account = Settings.Accounts.First(acc => acc.IsActive);            
429
			var dir = new DirectoryInfo(account.RootPath + @"\pithos");
430
			var files=dir.GetFiles();
431
			var r=new Random();
432
			var idx=r.Next(0, files.Length);
433
			ShowFileProperties(files[idx].FullName);            
434
		}
435

    
436
		public void ShowFileProperties(string filePath)
437
		{
438
			if (String.IsNullOrWhiteSpace(filePath))
439
				throw new ArgumentNullException("filePath");
440
			if (!File.Exists(filePath) && !Directory.Exists(filePath))
441
				throw new ArgumentException(String.Format("Non existent file {0}",filePath),"filePath");
442
			Contract.EndContractBlock();
443

    
444
			var pair=(from monitor in  Monitors
445
							   where filePath.StartsWith(monitor.Value.RootPath, StringComparison.InvariantCultureIgnoreCase)
446
								   select monitor).FirstOrDefault();
447
			var accountMonitor = pair.Value;
448

    
449
			if (accountMonitor == null)
450
				return;
451

    
452
			var infoTask=Task.Factory.StartNew(()=>accountMonitor.GetObjectInfo(filePath));
453

    
454
			
455

    
456
			var fileProperties = new FilePropertiesViewModel(this, infoTask,filePath);
457
			_windowManager.ShowWindow(fileProperties);
458
		} 
459
		
460
		public void ShowContainerProperties()
461
		{
462
			var account = Settings.Accounts.First(acc => acc.IsActive);            
463
			var dir = new DirectoryInfo(account.RootPath);
464
			var fullName = (from folder in dir.EnumerateDirectories()
465
							where (folder.Attributes & FileAttributes.Hidden) == 0
466
							select folder.FullName).First();
467
			ShowContainerProperties(fullName);            
468
		}
469

    
470
		public void ShowContainerProperties(string filePath)
471
		{
472
			if (String.IsNullOrWhiteSpace(filePath))
473
				throw new ArgumentNullException("filePath");
474
			if (!Directory.Exists(filePath))
475
				throw new ArgumentException(String.Format("Non existent file {0}",filePath),"filePath");
476
			Contract.EndContractBlock();
477

    
478
			var pair=(from monitor in  Monitors
479
							   where filePath.StartsWith(monitor.Value.RootPath, StringComparison.InvariantCultureIgnoreCase)
480
								   select monitor).FirstOrDefault();
481
			var accountMonitor = pair.Value;            
482
			var info = accountMonitor.GetContainerInfo(filePath);
483

    
484
			
485

    
486
			var containerProperties = new ContainerPropertiesViewModel(this, info,filePath);
487
			_windowManager.ShowWindow(containerProperties);
488
		}
489

    
490
		public void SynchNow()
491
		{
492
			_pollAgent.SynchNow();
493
		}
494

    
495
		public ObjectInfo RefreshObjectInfo(ObjectInfo currentInfo)
496
		{
497
			if (currentInfo==null)
498
				throw new ArgumentNullException("currentInfo");
499
			Contract.EndContractBlock();
500

    
501
			var monitor = Monitors[currentInfo.Account];
502
			var newInfo=monitor.CloudClient.GetObjectInfo(currentInfo.Account, currentInfo.Container, currentInfo.Name);
503
			return newInfo;
504
		}
505

    
506
		public ContainerInfo RefreshContainerInfo(ContainerInfo container)
507
		{
508
			if (container == null)
509
				throw new ArgumentNullException("container");
510
			Contract.EndContractBlock();
511

    
512
			var monitor = Monitors[container.Account];
513
			var newInfo = monitor.CloudClient.GetContainerInfo(container.Account, container.Name);
514
			return newInfo;
515
		}
516

    
517

    
518
		public void ToggleSynching()
519
		{
520
			bool isPaused=false;
521
			foreach (var pair in Monitors)
522
			{
523
				var monitor = pair.Value;
524
				monitor.Pause = !monitor.Pause;
525
				isPaused = monitor.Pause;
526
			}
527

    
528
			PauseSyncCaption = isPaused ? "Resume syncing" : "Pause syncing";
529
			var iconKey = isPaused? "TraySyncPaused" : "TrayInSynch";
530
			StatusIcon = String.Format(@"../Images/{0}.ico", iconKey);
531
		}
532

    
533
		public void ExitPithos()
534
		{
535
			foreach (var pair in Monitors)
536
			{
537
				var monitor = pair.Value;
538
				monitor.Stop();
539
			}
540

    
541
			((Window)GetView()).Close();
542
		}
543
		#endregion
544

    
545

    
546
		private readonly Dictionary<PithosStatus, StatusInfo> _iconNames = new List<StatusInfo>
547
			{
548
				new StatusInfo(PithosStatus.InSynch, "All files up to date", "TrayInSynch"),
549
				new StatusInfo(PithosStatus.Syncing, "Syncing Files", "TraySynching"),
550
				new StatusInfo(PithosStatus.SyncPaused, "Sync Paused", "TraySyncPaused")
551
			}.ToDictionary(s => s.Status);
552

    
553
		readonly IWindowManager _windowManager;
554
		
555

    
556
		///<summary>
557
		/// Updates the visual status indicators of the application depending on status changes, e.g. icon, stat		
558
		///</summary>
559
		public void UpdateStatus()
560
		{
561
			var pithosStatus = _statusChecker.GetPithosStatus();
562

    
563
			if (_iconNames.ContainsKey(pithosStatus))
564
			{
565
				var info = _iconNames[pithosStatus];
566
				StatusIcon = String.Format(@"../Images/{0}.ico", info.IconName);
567

    
568

    
569

    
570
				StatusMessage = String.Format("Pithos {0}\r\n{1}", _fileVersion.Value.FileVersion,info.StatusText);
571
			}
572
			
573
			//_events.Publish(new Notification { Title = "Start", Message = "Start Monitoring", Level = TraceLevel.Info});
574
		}
575

    
576

    
577
	   
578
		private Task StartMonitor(PithosMonitor monitor,int retries=0)
579
		{
580
			return Task.Factory.StartNew(() =>
581
			{
582
				using (log4net.ThreadContext.Stacks["Monitor"].Push("Start"))
583
				{
584
					try
585
					{
586
						Log.InfoFormat("Start Monitoring {0}", monitor.UserName);
587

    
588
						monitor.Start();
589
					}
590
					catch (WebException exc)
591
					{
592
						if (AbandonRetry(monitor, retries))
593
							return;
594

    
595
						HttpStatusCode statusCode =HttpStatusCode.OK;
596
						var response = exc.Response as HttpWebResponse;
597
						if(response!=null)
598
							statusCode = response.StatusCode;
599

    
600
						switch (statusCode)
601
						{
602
							case HttpStatusCode.Unauthorized:
603
								var message = String.Format("API Key Expired for {0}. Starting Renewal",
604
															monitor.UserName);
605
								Log.Error(message, exc);
606
						        var account = Settings.Accounts.Find(acc => acc.AccountName == monitor.UserName);                                
607
						        account.IsExpired = true;
608
                                Notify(new ExpirationNotification(account));
609
								//TryAuthorize(monitor.UserName, retries).Wait();
610
								break;
611
							case HttpStatusCode.ProxyAuthenticationRequired:
612
								TryAuthenticateProxy(monitor,retries);
613
								break;
614
							default:
615
								TryLater(monitor, exc, retries);
616
								break;
617
						}
618
					}
619
					catch (Exception exc)
620
					{
621
						if (AbandonRetry(monitor, retries)) 
622
							return;
623

    
624
						TryLater(monitor,exc,retries);
625
					}
626
				}
627
			});
628
		}
629

    
630
		private void TryAuthenticateProxy(PithosMonitor monitor,int retries)
631
		{
632
			Execute.OnUIThread(() =>
633
								   {                                       
634
									   var proxyAccount = IoC.Get<ProxyAccountViewModel>();
635
										proxyAccount.Settings = Settings;
636
									   if (true != _windowManager.ShowDialog(proxyAccount)) 
637
										   return;
638
									   StartMonitor(monitor, retries);
639
									   NotifyOfPropertyChange(() => Accounts);
640
								   });
641
		}
642

    
643
		private bool AbandonRetry(PithosMonitor monitor, int retries)
644
		{
645
			if (retries > 1)
646
			{
647
				var message = String.Format("Monitoring of account {0} has failed too many times. Will not retry",
648
											monitor.UserName);
649
				_events.Publish(new Notification
650
									{Title = "Account monitoring failed", Message = message, Level = TraceLevel.Error});
651
				return true;
652
			}
653
			return false;
654
		}
655

    
656

    
657
	    private void TryLater(PithosMonitor monitor, Exception exc,int retries)
658
		{
659
			var message = String.Format("An exception occured. Can't start monitoring\nWill retry in 10 seconds");
660
			Task.Factory.StartNewDelayed(10000, () => StartMonitor(monitor,retries+1));
661
			_events.Publish(new Notification
662
								{Title = "Error", Message = message, Level = TraceLevel.Error});
663
			Log.Error(message, exc);
664
		}
665

    
666

    
667
		public void NotifyChange(string status, TraceLevel level=TraceLevel.Info)
668
		{
669
			StatusMessage = status;
670
			
671
			_events.Publish(new Notification { Title = "Pithos", Message = status, Level = level });
672
		}
673

    
674
		public void NotifyChangedFile(string filePath)
675
		{
676
            if (RecentFiles.Any(e => e.FullPath == filePath))
677
                return;
678
            
679
			IProducerConsumerCollection<FileEntry> files=RecentFiles;
680
			FileEntry popped;
681
			while (files.Count > 5)
682
				files.TryTake(out popped);
683
            var entry = new FileEntry { FullPath = filePath };
684
			files.TryAdd(entry);
685
		}
686

    
687
		public void NotifyAccount(AccountInfo account)
688
		{
689
			if (account== null)
690
				return;
691
			//TODO: What happens to an existing account whose Token has changed?
692
			account.SiteUri= String.Format("{0}/ui/?token={1}&user={2}",
693
				account.SiteUri, Uri.EscapeDataString(account.Token),
694
				Uri.EscapeDataString(account.UserName));
695

    
696
			if (Accounts.All(item => item.UserName != account.UserName))
697
				Accounts.TryAdd(account);
698

    
699
		}
700

    
701
		public void NotifyConflicts(IEnumerable<FileSystemInfo> conflictFiles, string message)
702
		{
703
			if (conflictFiles == null)
704
				return;
705
		    //Convert to list to avoid multiple iterations
706
            var files = conflictFiles.ToList();
707
			if (files.Count==0)
708
				return;
709

    
710
			UpdateStatus();
711
			//TODO: Create a more specific message. For now, just show a warning
712
			NotifyForFiles(files,message,TraceLevel.Warning);
713

    
714
		}
715

    
716
		public void NotifyForFiles(IEnumerable<FileSystemInfo> files, string message,TraceLevel level=TraceLevel.Info)
717
		{
718
			if (files == null)
719
				return;
720
			if (!files.Any())
721
				return;
722

    
723
			StatusMessage = message;
724

    
725
			_events.Publish(new Notification { Title = "Pithos", Message = message, Level = level});
726
		}
727

    
728
		public void Notify(Notification notification)
729
		{
730
			_events.Publish(notification);
731
		}
732

    
733

    
734
		public void RemoveMonitor(string accountName)
735
		{
736
			if (String.IsNullOrWhiteSpace(accountName))
737
				return;
738

    
739
			var accountInfo=_accounts.FirstOrDefault(account => account.UserName == accountName);
740
            if (accountInfo != null)
741
            {
742
                _accounts.TryRemove(accountInfo);
743
                _pollAgent.RemoveAccount(accountInfo);
744
            }
745

    
746
		    PithosMonitor monitor;
747
			if (Monitors.TryRemove(accountName, out monitor))
748
			{
749
				monitor.Stop();
750
                //TODO: Also remove any pending actions for this account
751
                //from the network queue                
752
			}
753
		}
754

    
755
		public void RefreshOverlays()
756
		{
757
			foreach (var pair in Monitors)
758
			{
759
				var monitor = pair.Value;
760

    
761
				var path = monitor.RootPath;
762

    
763
				if (String.IsNullOrWhiteSpace(path))
764
					continue;
765

    
766
				if (!Directory.Exists(path) && !File.Exists(path))
767
					continue;
768

    
769
				IntPtr pathPointer = Marshal.StringToCoTaskMemAuto(path);
770

    
771
				try
772
				{
773
					NativeMethods.SHChangeNotify(HChangeNotifyEventID.SHCNE_UPDATEITEM,
774
												 HChangeNotifyFlags.SHCNF_PATHW | HChangeNotifyFlags.SHCNF_FLUSHNOWAIT,
775
												 pathPointer, IntPtr.Zero);
776
				}
777
				finally
778
				{
779
					Marshal.FreeHGlobal(pathPointer);
780
				}
781
			}
782
		}
783

    
784
		#region Event Handlers
785
		
786
		public void Handle(SelectiveSynchChanges message)
787
		{
788
			var accountName = message.Account.AccountName;
789
			PithosMonitor monitor;
790
			if (_monitors.TryGetValue(accountName, out monitor))
791
			{
792
				monitor.SetSelectivePaths(message.Uris,message.Added,message.Removed);
793

    
794
			}
795
			
796
		}
797

    
798

    
799
		private bool _pollStarted;
800

    
801
		//SMELL: Doing so much work for notifications in the shell is wrong
802
		//The notifications should be moved to their own view/viewmodel pair
803
		//and different templates should be used for different message types
804
		//This will also allow the addition of extra functionality, eg. actions
805
		//
806
		public void Handle(Notification notification)
807
		{
808
			UpdateStatus();
809

    
810
			if (!Settings.ShowDesktopNotifications)
811
				return;
812

    
813
			if (notification is PollNotification)
814
			{
815
				_pollStarted = true;
816
				return;
817
			}
818
			if (notification is CloudNotification)
819
			{
820
				if (!_pollStarted) 
821
					return;
822
				_pollStarted= false;
823
				notification.Title = "Pithos";
824
				notification.Message = "Start Synchronisation";
825
			}
826

    
827
			if (String.IsNullOrWhiteSpace(notification.Message) && String.IsNullOrWhiteSpace(notification.Title))
828
				return;
829

    
830
			BalloonIcon icon;
831
			switch (notification.Level)
832
			{
833
				case TraceLevel.Error:
834
					icon = BalloonIcon.Error;
835
					break;
836
				case TraceLevel.Info:
837
				case TraceLevel.Verbose:
838
					icon = BalloonIcon.Info;
839
					break;
840
				case TraceLevel.Warning:
841
					icon = BalloonIcon.Warning;
842
					break;
843
				default:
844
					icon = BalloonIcon.None;
845
					break;
846
			}
847
			
848
			if (Settings.ShowDesktopNotifications)
849
			{
850
				var tv = (ShellView) GetView();
851
			    System.Action clickAction = null;
852
                if (notification is ExpirationNotification)
853
                {
854
                    clickAction = ()=>ShowPreferences("AccountTab");
855
                }
856
				var balloon=new PithosBalloon{Title=notification.Title,Message=notification.Message,Icon=icon,ClickAction=clickAction};
857
				tv.TaskbarView.ShowCustomBalloon(balloon,PopupAnimation.Fade,4000);
858
//				tv.TaskbarView.ShowBalloonTip(notification.Title, notification.Message, icon);
859
			}
860
		}
861
		#endregion
862

    
863
		public void Handle(ShowFilePropertiesEvent message)
864
		{
865
			if (message == null)
866
				throw new ArgumentNullException("message");
867
			if (String.IsNullOrWhiteSpace(message.FileName) )
868
				throw new ArgumentException("message");
869
			Contract.EndContractBlock();
870

    
871
			var fileName = message.FileName;
872
			//TODO: Display file properties for non-container folders
873
			if (File.Exists(fileName))
874
				//Retrieve the full name with exact casing. Pithos names are case sensitive				
875
				ShowFileProperties(FileInfoExtensions.GetProperFilePathCapitalization(fileName));
876
			else if (Directory.Exists(fileName))
877
				//Retrieve the full name with exact casing. Pithos names are case sensitive
878
			{
879
				var path = FileInfoExtensions.GetProperDirectoryCapitalization(fileName);
880
				if (IsContainer(path))
881
					ShowContainerProperties(path);
882
				else
883
					ShowFileProperties(path);
884
			}
885
		}
886

    
887
		private bool IsContainer(string path)
888
		{
889
			var matchingFolders = from account in _accounts
890
								  from rootFolder in Directory.GetDirectories(account.AccountPath)
891
								  where rootFolder.Equals(path, StringComparison.InvariantCultureIgnoreCase)
892
								  select rootFolder;
893
			return matchingFolders.Any();
894
		}
895

    
896
		public FileStatus GetFileStatus(string localFileName)
897
		{
898
			if (String.IsNullOrWhiteSpace(localFileName))
899
				throw new ArgumentNullException("localFileName");
900
			Contract.EndContractBlock();
901
			
902
			var statusKeeper = IoC.Get<IStatusKeeper>();
903
			var status=statusKeeper.GetFileStatus(localFileName);
904
			return status;
905
		}
906
	}
907
}