root / trunk / Pithos.Client.WPF / Shell / ShellViewModel.cs @ 03ee454f
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using System.Collections.Concurrent; |
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using System.ComponentModel; |
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using System.ComponentModel.Composition; |
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using System.Diagnostics; |
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using System.Diagnostics.Contracts; |
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using System.IO; |
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using System.Net; |
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using System.Reflection; |
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using System.Runtime.InteropServices; |
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using System.ServiceModel; |
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using System.ServiceModel.Description; |
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using System.Threading.Tasks; |
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using System.Windows; |
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using Caliburn.Micro; |
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using Hardcodet.Wpf.TaskbarNotification; |
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using Pithos.Client.WPF.Configuration; |
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using Pithos.Client.WPF.FileProperties; |
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using Pithos.Client.WPF.Properties; |
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using Pithos.Client.WPF.SelectiveSynch; |
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using Pithos.Client.WPF.Services; |
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using Pithos.Client.WPF.Shell; |
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using Pithos.Core; |
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using Pithos.Interfaces; |
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using System; |
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using System.Collections.Generic; |
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using System.Linq; |
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using System.Text; |
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using Pithos.Network; |
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using StatusService = Pithos.Client.WPF.Services.StatusService; |
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|
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namespace Pithos.Client.WPF { |
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using System.ComponentModel.Composition; |
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|
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|
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///<summary> |
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/// The "shell" of the Pithos application displays the taskbar icon, menu and notifications. |
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/// The shell also hosts the status service called by shell extensions to retrieve file info |
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///</summary> |
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///<remarks> |
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/// It is a strange "shell" as its main visible element is an icon instead of a window |
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/// The shell subscribes to the following events: |
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/// * Notification: Raised by components that want to notify the user. Usually displayed in a balloon |
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/// * 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 |
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/// * ShowFilePropertiesEvent: Raised when a shell command requests the display of the file/container properties dialog |
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///</remarks> |
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//TODO: CODE SMELL Why does the shell handle the SelectiveSynchChanges? |
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[Export(typeof(IShell))] |
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public class ShellViewModel : Screen, IStatusNotification, IShell, |
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IHandle<Notification>, IHandle<SelectiveSynchChanges>, IHandle<ShowFilePropertiesEvent> |
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{ |
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//The Status Checker provides the current synch state |
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//TODO: Could we remove the status checker and use events in its place? |
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private IStatusChecker _statusChecker; |
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private IEventAggregator _events; |
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|
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public PithosSettings Settings { get; private set; } |
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|
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|
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private Dictionary<string, PithosMonitor> _monitors = new Dictionary<string, PithosMonitor>(); |
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///<summary> |
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/// Dictionary of account monitors, keyed by account |
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///</summary> |
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///<remarks> |
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/// One monitor class is created for each account. The Shell needs access to the monitors to execute start/stop/pause commands, |
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/// retrieve account and boject info |
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///</remarks> |
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// TODO: Does the Shell REALLY need access to the monitors? Could we achieve the same results with a better design? |
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// TODO: The monitors should be internal to Pithos.Core, even though exposing them makes coding of the Object and Container windows easier |
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public Dictionary<string, PithosMonitor> Monitors |
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{ |
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get { return _monitors; } |
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} |
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|
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|
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///<summary> |
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/// The status service is used by Shell extensions to retrieve file status information |
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///</summary> |
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//TODO: CODE SMELL! This is the shell! While hosting in the shell makes executing start/stop commands easier, it is still a smell |
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private ServiceHost _statusService { get; set; } |
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|
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//Logging in the Pithos client is provided by log4net |
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private static readonly log4net.ILog Log = log4net.LogManager.GetLogger("Pithos"); |
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|
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///<summary> |
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/// The Shell depends on MEF to provide implementations for windowManager, events, the status checker service and the settings |
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///</summary> |
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///<remarks> |
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/// The PithosSettings class encapsulates the app's settings to abstract their storage mechanism (App settings, a database or registry) |
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///</remarks> |
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[ImportingConstructor] |
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public ShellViewModel(IWindowManager windowManager, IEventAggregator events, IStatusChecker statusChecker, PithosSettings settings) |
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{ |
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try |
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{ |
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|
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_windowManager = windowManager; |
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//CHECK: Caliburn doesn't need explicit command construction |
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//OpenPithosFolderCommand = new PithosCommand(OpenPithosFolder); |
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_statusChecker = statusChecker; |
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//The event subst |
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_events = events; |
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_events.Subscribe(this); |
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|
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Settings = settings; |
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|
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StatusMessage = "In Synch"; |
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|
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} |
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catch (Exception exc) |
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{ |
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Log.Error("Error while starting the ShellViewModel",exc); |
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throw; |
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} |
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} |
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|
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protected override void OnActivate() |
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{ |
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base.OnActivate(); |
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|
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StartMonitoring(); |
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} |
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|
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|
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private async Task StartMonitoring() |
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{ |
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try |
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{ |
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foreach (var account in Settings.Accounts) |
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{ |
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await MonitorAccount(account); |
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} |
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_statusService = StatusService.Start(); |
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} |
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catch (AggregateException exc) |
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{ |
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exc.Handle(e => |
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{ |
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Log.Error("Error while starting monitoring", e); |
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return true; |
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}); |
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throw; |
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} |
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} |
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|
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protected override void OnDeactivate(bool close) |
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{ |
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base.OnDeactivate(close); |
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if (close) |
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{ |
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StatusService.Stop(_statusService); |
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_statusService = null; |
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} |
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} |
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|
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public Task MonitorAccount(AccountSettings account) |
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{ |
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return Task.Factory.StartNew(() => |
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{ |
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PithosMonitor monitor = null; |
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var accountName = account.AccountName; |
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|
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if (_monitors.TryGetValue(accountName, out monitor)) |
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{ |
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//If the account is active |
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if (account.IsActive) |
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//Start the monitor. It's OK to start an already started monitor, |
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//it will just ignore the call |
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monitor.Start(); |
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else |
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{ |
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//If the account is inactive |
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//Stop and remove the monitor |
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RemoveMonitor(accountName); |
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} |
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return; |
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} |
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|
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//Create a new monitor/ Can't use MEF here, it would return a single instance for all monitors |
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monitor = new PithosMonitor |
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{ |
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UserName = accountName, |
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ApiKey = account.ApiKey, |
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UsePithos = account.UsePithos, |
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StatusNotification = this, |
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RootPath = account.RootPath |
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}; |
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//PithosMonitor uses MEF so we need to resolve it |
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IoC.BuildUp(monitor); |
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|
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var appSettings = Properties.Settings.Default; |
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monitor.AuthenticationUrl = account.UsePithos |
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? appSettings.PithosAuthenticationUrl |
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: appSettings.CloudfilesAuthenticationUrl; |
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|
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_monitors[accountName] = monitor; |
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|
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if (account.IsActive) |
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{ |
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//Don't start a monitor if it doesn't have an account and ApiKey |
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if (String.IsNullOrWhiteSpace(monitor.UserName) || |
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String.IsNullOrWhiteSpace(monitor.ApiKey)) |
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return; |
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StartMonitor(monitor); |
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} |
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}); |
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} |
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|
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|
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protected override void OnViewLoaded(object view) |
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{ |
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var window = (Window)view; |
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window.Hide(); |
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UpdateStatus(); |
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base.OnViewLoaded(view); |
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} |
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|
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|
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#region Status Properties |
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|
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private string _statusMessage; |
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public string StatusMessage |
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{ |
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get { return _statusMessage; } |
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set |
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{ |
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_statusMessage = value; |
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NotifyOfPropertyChange(() => StatusMessage); |
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} |
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} |
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|
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private ObservableConcurrentCollection<AccountInfo> _accounts = new ObservableConcurrentCollection<AccountInfo>(); |
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public ObservableConcurrentCollection<AccountInfo> Accounts |
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{ |
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get { return _accounts; } |
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} |
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|
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|
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private string _pauseSyncCaption="Pause Syncing"; |
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public string PauseSyncCaption |
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{ |
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get { return _pauseSyncCaption; } |
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set |
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{ |
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_pauseSyncCaption = value; |
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NotifyOfPropertyChange(() => PauseSyncCaption); |
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} |
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} |
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|
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private readonly ObservableConcurrentCollection<FileEntry> _recentFiles = new ObservableConcurrentCollection<FileEntry>(); |
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public ObservableConcurrentCollection<FileEntry> RecentFiles |
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{ |
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get { return _recentFiles; } |
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} |
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|
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|
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private string _statusIcon="../Images/Tray.ico"; |
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public string StatusIcon |
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{ |
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get { return _statusIcon; } |
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set |
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{ |
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_statusIcon = value; |
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NotifyOfPropertyChange(() => StatusIcon); |
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} |
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} |
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|
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#endregion |
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|
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#region Commands |
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|
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public void ShowPreferences() |
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{ |
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Settings.Reload(); |
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var preferences = new PreferencesViewModel(_windowManager,_events, this,Settings); |
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_windowManager.ShowDialog(preferences); |
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|
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} |
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|
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public void AboutPithos() |
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{ |
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var about = new AboutViewModel(); |
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_windowManager.ShowWindow(about); |
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} |
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|
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public void SendFeedback() |
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{ |
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var feedBack = IoC.Get<FeedbackViewModel>(); |
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_windowManager.ShowWindow(feedBack); |
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} |
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|
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//public PithosCommand OpenPithosFolderCommand { get; private set; } |
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|
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public void OpenPithosFolder() |
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{ |
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var account = Settings.Accounts.FirstOrDefault(acc => acc.IsActive); |
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if (account == null) |
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return; |
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Process.Start(account.RootPath); |
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} |
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|
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public void OpenPithosFolder(AccountInfo account) |
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{ |
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Process.Start(account.AccountPath); |
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} |
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|
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|
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public void GoToSite(AccountInfo account) |
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{ |
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var site = String.Format("{0}/ui/?token={1}&user={2}", |
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Properties.Settings.Default.PithosSite,account.Token, |
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account.UserName); |
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Process.Start(site); |
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} |
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|
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public void ShowFileProperties() |
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{ |
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var account = Settings.Accounts.First(acc => acc.IsActive); |
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var dir = new DirectoryInfo(account.RootPath + @"\pithos"); |
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var files=dir.GetFiles(); |
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var r=new Random(); |
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var idx=r.Next(0, files.Length); |
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ShowFileProperties(files[idx].FullName); |
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} |
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|
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public void ShowFileProperties(string filePath) |
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{ |
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if (String.IsNullOrWhiteSpace(filePath)) |
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throw new ArgumentNullException("filePath"); |
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if (!File.Exists(filePath)) |
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throw new ArgumentException(String.Format("Non existent file {0}",filePath),"filePath"); |
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Contract.EndContractBlock(); |
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|
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var pair=(from monitor in Monitors |
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where filePath.StartsWith(monitor.Value.RootPath, StringComparison.InvariantCultureIgnoreCase) |
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select monitor).FirstOrDefault(); |
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var account = pair.Key; |
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var accountMonitor = pair.Value; |
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|
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if (accountMonitor == null) |
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return; |
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|
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var infoTask=Task.Factory.StartNew(()=>accountMonitor.GetObjectInfo(filePath)); |
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|
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|
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|
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var fileProperties = new FilePropertiesViewModel(this, infoTask,filePath); |
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_windowManager.ShowWindow(fileProperties); |
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} |
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|
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public void ShowContainerProperties() |
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{ |
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var account = Settings.Accounts.First(acc => acc.IsActive); |
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var dir = new DirectoryInfo(account.RootPath); |
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var fullName = (from folder in dir.EnumerateDirectories() |
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where (folder.Attributes & FileAttributes.Hidden) == 0 |
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select folder.FullName).First(); |
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ShowContainerProperties(fullName); |
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} |
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|
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public void ShowContainerProperties(string filePath) |
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{ |
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if (String.IsNullOrWhiteSpace(filePath)) |
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throw new ArgumentNullException("filePath"); |
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if (!Directory.Exists(filePath)) |
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throw new ArgumentException(String.Format("Non existent file {0}",filePath),"filePath"); |
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Contract.EndContractBlock(); |
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|
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var pair=(from monitor in Monitors |
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where filePath.StartsWith(monitor.Value.RootPath, StringComparison.InvariantCultureIgnoreCase) |
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select monitor).FirstOrDefault(); |
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var account = pair.Key; |
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var accountMonitor = pair.Value; |
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var info = accountMonitor.GetContainerInfo(filePath); |
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|
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|
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|
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var containerProperties = new ContainerPropertiesViewModel(this, info,filePath); |
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_windowManager.ShowWindow(containerProperties); |
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} |
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|
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public ObjectInfo RefreshObjectInfo(ObjectInfo currentInfo) |
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{ |
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if (currentInfo==null) |
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throw new ArgumentNullException("currentInfo"); |
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Contract.EndContractBlock(); |
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|
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var monitor = Monitors[currentInfo.Account]; |
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var newInfo=monitor.CloudClient.GetObjectInfo(currentInfo.Account, currentInfo.Container, currentInfo.Name); |
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return newInfo; |
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} |
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|
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public ContainerInfo RefreshContainerInfo(ContainerInfo container) |
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{ |
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if (container == null) |
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throw new ArgumentNullException("container"); |
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Contract.EndContractBlock(); |
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|
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var monitor = Monitors[container.Account]; |
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var newInfo = monitor.CloudClient.GetContainerInfo(container.Account, container.Name); |
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return newInfo; |
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} |
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|
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|
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public void ToggleSynching() |
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{ |
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bool isPaused=false; |
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foreach (var pair in Monitors) |
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{ |
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var monitor = pair.Value; |
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monitor.Pause = !monitor.Pause; |
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isPaused = monitor.Pause; |
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} |
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|
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PauseSyncCaption = isPaused ? "Resume syncing" : "Pause syncing"; |
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var iconKey = isPaused? "TraySyncPaused" : "TrayInSynch"; |
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StatusIcon = String.Format(@"../Images/{0}.ico", iconKey); |
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} |
418 |
|
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public void ExitPithos() |
420 |
{ |
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foreach (var pair in Monitors) |
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{ |
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var monitor = pair.Value; |
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monitor.Stop(); |
425 |
} |
426 |
|
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((Window)GetView()).Close(); |
428 |
} |
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#endregion |
430 |
|
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|
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private Dictionary<PithosStatus, StatusInfo> iconNames = new List<StatusInfo> |
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{ |
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new StatusInfo(PithosStatus.InSynch, "All files up to date", "TrayInSynch"), |
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new StatusInfo(PithosStatus.Syncing, "Syncing Files", "TraySynching"), |
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new StatusInfo(PithosStatus.SyncPaused, "Sync Paused", "TraySyncPaused") |
437 |
}.ToDictionary(s => s.Status); |
438 |
|
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readonly IWindowManager _windowManager; |
440 |
|
441 |
|
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///<summary> |
443 |
/// Updates the visual status indicators of the application depending on status changes, e.g. icon, stat |
444 |
///</summary> |
445 |
public void UpdateStatus() |
446 |
{ |
447 |
var pithosStatus = _statusChecker.GetPithosStatus(); |
448 |
|
449 |
if (iconNames.ContainsKey(pithosStatus)) |
450 |
{ |
451 |
var info = iconNames[pithosStatus]; |
452 |
StatusIcon = String.Format(@"../Images/{0}.ico", info.IconName); |
453 |
|
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Assembly assembly = Assembly.GetExecutingAssembly(); |
455 |
var fileVersion = FileVersionInfo.GetVersionInfo(assembly.Location); |
456 |
|
457 |
|
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StatusMessage = String.Format("Pithos {0}\r\n{1}", fileVersion.FileVersion,info.StatusText); |
459 |
} |
460 |
|
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_events.Publish(new Notification { Title = "Start", Message = "Start Monitoring", Level = TraceLevel.Info}); |
462 |
} |
463 |
|
464 |
|
465 |
|
466 |
private Task StartMonitor(PithosMonitor monitor,int retries=0) |
467 |
{ |
468 |
return Task.Factory.StartNew(() => |
469 |
{ |
470 |
using (log4net.ThreadContext.Stacks["Monitor"].Push("Start")) |
471 |
{ |
472 |
try |
473 |
{ |
474 |
Log.InfoFormat("Start Monitoring {0}", monitor.UserName); |
475 |
|
476 |
monitor.Start(); |
477 |
} |
478 |
catch (WebException exc) |
479 |
{ |
480 |
if (AbandonRetry(monitor, retries)) |
481 |
return; |
482 |
|
483 |
if (IsUnauthorized(exc)) |
484 |
{ |
485 |
var message = String.Format("API Key Expired for {0}. Starting Renewal",monitor.UserName); |
486 |
Log.Error(message,exc); |
487 |
TryAuthorize(monitor,retries).Wait(); |
488 |
} |
489 |
else |
490 |
{ |
491 |
TryLater(monitor, exc,retries); |
492 |
} |
493 |
} |
494 |
catch (Exception exc) |
495 |
{ |
496 |
if (AbandonRetry(monitor, retries)) |
497 |
return; |
498 |
|
499 |
TryLater(monitor,exc,retries); |
500 |
} |
501 |
} |
502 |
}); |
503 |
} |
504 |
|
505 |
private bool AbandonRetry(PithosMonitor monitor, int retries) |
506 |
{ |
507 |
if (retries > 1) |
508 |
{ |
509 |
var message = String.Format("Monitoring of account {0} has failed too many times. Will not retry", |
510 |
monitor.UserName); |
511 |
_events.Publish(new Notification |
512 |
{Title = "Account monitoring failed", Message = message, Level = TraceLevel.Error}); |
513 |
return true; |
514 |
} |
515 |
return false; |
516 |
} |
517 |
|
518 |
|
519 |
private async Task TryAuthorize(PithosMonitor monitor,int retries) |
520 |
{ |
521 |
_events.Publish(new Notification { Title = "Authorization failed", Message = "Your API Key has probably expired. You will be directed to a page where you can renew it", Level = TraceLevel.Error }); |
522 |
|
523 |
try |
524 |
{ |
525 |
|
526 |
var credentials = await PithosAccount.RetrieveCredentials(Settings.PithosLoginUrl); |
527 |
|
528 |
var account = Settings.Accounts.FirstOrDefault(act => act.AccountName == credentials.UserName); |
529 |
account.ApiKey = credentials.Password; |
530 |
monitor.ApiKey = credentials.Password; |
531 |
Settings.Save(); |
532 |
await TaskEx.Delay(10000); |
533 |
StartMonitor(monitor, retries + 1); |
534 |
NotifyOfPropertyChange(()=>Accounts); |
535 |
} |
536 |
catch (AggregateException exc) |
537 |
{ |
538 |
string message = String.Format("API Key retrieval for {0} failed", monitor.UserName); |
539 |
Log.Error(message, exc.InnerException); |
540 |
_events.Publish(new Notification { Title = "Authorization failed", Message = message, Level = TraceLevel.Error }); |
541 |
return; |
542 |
} |
543 |
catch (Exception exc) |
544 |
{ |
545 |
string message = String.Format("API Key retrieval for {0} failed", monitor.UserName); |
546 |
Log.Error(message, exc); |
547 |
_events.Publish(new Notification { Title = "Authorization failed", Message = message, Level = TraceLevel.Error }); |
548 |
return; |
549 |
|
550 |
} |
551 |
|
552 |
} |
553 |
|
554 |
private static bool IsUnauthorized(WebException exc) |
555 |
{ |
556 |
if (exc==null) |
557 |
throw new ArgumentNullException("exc"); |
558 |
Contract.EndContractBlock(); |
559 |
|
560 |
var response = exc.Response as HttpWebResponse; |
561 |
if (response == null) |
562 |
return false; |
563 |
return (response.StatusCode == HttpStatusCode.Unauthorized); |
564 |
} |
565 |
|
566 |
private void TryLater(PithosMonitor monitor, Exception exc,int retries) |
567 |
{ |
568 |
var message = String.Format("An exception occured. Can't start monitoring\nWill retry in 10 seconds"); |
569 |
Task.Factory.StartNewDelayed(10000, () => StartMonitor(monitor,retries+1)); |
570 |
_events.Publish(new Notification |
571 |
{Title = "Error", Message = message, Level = TraceLevel.Error}); |
572 |
Log.Error(message, exc); |
573 |
} |
574 |
|
575 |
|
576 |
public void NotifyChange(string status, TraceLevel level=TraceLevel.Info) |
577 |
{ |
578 |
this.StatusMessage = status; |
579 |
|
580 |
_events.Publish(new Notification { Title = "Pithos", Message = status, Level = level }); |
581 |
} |
582 |
|
583 |
public void NotifyChangedFile(string filePath) |
584 |
{ |
585 |
var entry = new FileEntry {FullPath=filePath}; |
586 |
IProducerConsumerCollection<FileEntry> files=this.RecentFiles; |
587 |
FileEntry popped; |
588 |
while (files.Count > 5) |
589 |
files.TryTake(out popped); |
590 |
files.TryAdd(entry); |
591 |
} |
592 |
|
593 |
public void NotifyAccount(AccountInfo account) |
594 |
{ |
595 |
if (account== null) |
596 |
return; |
597 |
|
598 |
account.SiteUri= String.Format("{0}/ui/?token={1}&user={2}", |
599 |
Properties.Settings.Default.PithosSite, account.Token, |
600 |
account.UserName); |
601 |
|
602 |
IProducerConsumerCollection<AccountInfo> accounts = Accounts; |
603 |
for (var i = 0; i < _accounts.Count; i++) |
604 |
{ |
605 |
AccountInfo item; |
606 |
if (accounts.TryTake(out item)) |
607 |
{ |
608 |
if (item.UserName!=account.UserName) |
609 |
{ |
610 |
accounts.TryAdd(item); |
611 |
} |
612 |
} |
613 |
} |
614 |
|
615 |
accounts.TryAdd(account); |
616 |
} |
617 |
|
618 |
|
619 |
public void RemoveMonitor(string accountName) |
620 |
{ |
621 |
if (String.IsNullOrWhiteSpace(accountName)) |
622 |
return; |
623 |
|
624 |
PithosMonitor monitor; |
625 |
if (Monitors.TryGetValue(accountName, out monitor)) |
626 |
{ |
627 |
Monitors.Remove(accountName); |
628 |
monitor.Stop(); |
629 |
} |
630 |
} |
631 |
|
632 |
public void RefreshOverlays() |
633 |
{ |
634 |
foreach (var pair in Monitors) |
635 |
{ |
636 |
var monitor = pair.Value; |
637 |
|
638 |
var path = monitor.RootPath; |
639 |
|
640 |
if (String.IsNullOrWhiteSpace(path)) |
641 |
continue; |
642 |
|
643 |
if (!Directory.Exists(path) && !File.Exists(path)) |
644 |
continue; |
645 |
|
646 |
IntPtr pathPointer = Marshal.StringToCoTaskMemAuto(path); |
647 |
|
648 |
try |
649 |
{ |
650 |
NativeMethods.SHChangeNotify(HChangeNotifyEventID.SHCNE_UPDATEITEM, |
651 |
HChangeNotifyFlags.SHCNF_PATHW | HChangeNotifyFlags.SHCNF_FLUSHNOWAIT, |
652 |
pathPointer, IntPtr.Zero); |
653 |
} |
654 |
finally |
655 |
{ |
656 |
Marshal.FreeHGlobal(pathPointer); |
657 |
} |
658 |
} |
659 |
} |
660 |
|
661 |
#region Event Handlers |
662 |
|
663 |
public void Handle(SelectiveSynchChanges message) |
664 |
{ |
665 |
var accountName = message.Account.AccountName; |
666 |
PithosMonitor monitor; |
667 |
if (_monitors.TryGetValue(accountName, out monitor)) |
668 |
{ |
669 |
monitor.AddSelectivePaths(message.Added); |
670 |
monitor.RemoveSelectivePaths(message.Removed); |
671 |
|
672 |
} |
673 |
|
674 |
} |
675 |
|
676 |
|
677 |
public void Handle(Notification notification) |
678 |
{ |
679 |
if (!Settings.ShowDesktopNotifications) |
680 |
return; |
681 |
BalloonIcon icon = BalloonIcon.None; |
682 |
switch (notification.Level) |
683 |
{ |
684 |
case TraceLevel.Error: |
685 |
icon = BalloonIcon.Error; |
686 |
break; |
687 |
case TraceLevel.Info: |
688 |
case TraceLevel.Verbose: |
689 |
icon = BalloonIcon.Info; |
690 |
break; |
691 |
case TraceLevel.Warning: |
692 |
icon = BalloonIcon.Warning; |
693 |
break; |
694 |
default: |
695 |
icon = BalloonIcon.None; |
696 |
break; |
697 |
} |
698 |
|
699 |
if (Settings.ShowDesktopNotifications) |
700 |
{ |
701 |
var tv = (ShellView) this.GetView(); |
702 |
tv.TaskbarView.ShowBalloonTip(notification.Title, notification.Message, icon); |
703 |
} |
704 |
} |
705 |
#endregion |
706 |
|
707 |
public void Handle(ShowFilePropertiesEvent message) |
708 |
{ |
709 |
if (message == null) |
710 |
throw new ArgumentNullException("message"); |
711 |
if (String.IsNullOrWhiteSpace(message.FileName) ) |
712 |
throw new ArgumentException("message"); |
713 |
Contract.EndContractBlock(); |
714 |
|
715 |
var fileName = message.FileName; |
716 |
|
717 |
if (File.Exists(fileName)) |
718 |
this.ShowFileProperties(fileName); |
719 |
else if (Directory.Exists(fileName)) |
720 |
this.ShowContainerProperties(fileName); |
721 |
} |
722 |
} |
723 |
} |