Software/Visual_Studio/MachineStudio/Tango.MachineStudio.UI/StudioApplication/DefaultStudioApplicationManager.cs

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading;
using System.Threading.Tasks;
using Tango.Core.Helpers;
using Tango.MachineStudio.Common.StudioApplication;
using Tango.MachineStudio.Common.Navigation;
using System.Reflection;
using System.Collections;
using Tango.Core;
using Tango.Logging;
using Tango.MachineStudio.Common.Modules;
using Tango.MachineStudio.Common;
using Tango.Settings;
using System.Windows;
using Tango.Integration.ExternalBridge;
using Tango.MachineStudio.Common.EventLogging;
using Tango.BL.Enumerations;
using Tango.Core.DI;

namespace Tango.MachineStudio.UI.StudioApplication
{
    /// <summary>
    /// Represents the default Machine Studio <see cref="IStudioApplicationManager">Application Manager</see>.
    /// </summary>
    /// <seealso cref="Tango.Core.ExtendedObject" />
    /// <seealso cref="Tango.MachineStudio.Common.StudioApplication.IStudioApplicationManager" />
    public class DefaultStudioApplicationManager : ExtendedObject, IStudioApplicationManager
    {
        private INavigationManager _navigationManager;
        private IStudioModuleLoader _moduleLoader;
        private List<Window> _openedWindows;

        /// <summary>
        /// Initializes a new instance of the <see cref="DefaultStudioApplicationManager" /> class.
        /// </summary>
        /// <param name="navigationManager">The navigation manager.</param>
        public DefaultStudioApplicationManager(INavigationManager navigationManager, IStudioModuleLoader moduleLoader)
        {
            _moduleLoader = moduleLoader;
            _navigationManager = navigationManager;
            _openedWindows = new List<Window>();

            Application.Current.MainWindow.ContentRendered += (_, __) => 
            {
                TangoIOC.Default.GetAllInstancesByBase<IStudioViewModel>().ToList().ForEach(x => x.OnApplicationStarted());
            };
        }

        /// <summary>
        /// Gets a value indicating whether Machine Studio is shutting down.
        /// </summary>
        public bool IsShuttingDown { get; private set; }

        /// <summary>
        /// The connected machine
        /// </summary>
        private IExternalBridgeClient _connectedMachine;

        /// <summary>
        /// Occurs when the connected machine property has changed.
        /// </summary>
        public event EventHandler<IExternalBridgeClient> ConnectedMachineChanged;

        /// <summary>
        /// Gets or sets the currently connected machine if any.
        /// </summary>
        public IExternalBridgeClient ConnectedMachine
        {
            get { return _connectedMachine; }
            set
            {
                _connectedMachine = value;
                RaisePropertyChangedAuto();
                RaisePropertyChanged(nameof(IsMachineConnected));
                RaisePropertyChanged(nameof(IsMachineConnectedViaTCP));

                if (_connectedMachine != null)
                {
                    _connectedMachine.StateChanged -= ConnectedMachine_StateChanged;
                    _connectedMachine.StateChanged += ConnectedMachine_StateChanged;
                }

                ConnectedMachineChanged?.Invoke(this, _connectedMachine);
            }
        }

        /// <summary>
        /// Gets a value indicating whether the <see cref="P:Tango.MachineStudio.Common.StudioApplication.IStudioApplicationManager.ConnectedMachine" /> is valid and connected through TCP/IP.
        /// </summary>
        public bool IsMachineConnectedViaTCP
        {
            get { return IsMachineConnected && ConnectedMachine is ExternalBridgeTcpClient; }
        }

        /// <summary>
        /// Handles the <see cref="ConnectedMachine"/> state changed event.
        /// </summary>
        /// <param name="sender">The sender.</param>
        /// <param name="e">The e.</param>
        private void ConnectedMachine_StateChanged(object sender, Transport.TransportComponentState e)
        {
            if (e == Transport.TransportComponentState.Disconnected || e == Transport.TransportComponentState.Failed)
            {
                ConnectedMachine = null;
            }

        }

        /// <summary>
        /// Gets a value indicating whether the <see cref="P:Tango.MachineStudio.Common.StudioApplication.IStudioApplicationManager.ConnectedMachine" /> is valid.
        /// </summary>
        public bool IsMachineConnected
        {
            get { return ConnectedMachine != null; }
        }

        /// <summary>
        /// Gets the machine studio application version.
        /// </summary>
        public Version Version
        {
            get
            {
                return AssemblyHelper.GetCurrentAssemblyVersion();
            }
        }

        /// <summary>
        /// Shutdown the application.
        /// </summary>
        public async void ShutDown()
        {
            if (IsShuttingDown) return;

            IsShuttingDown = true;

            try
            {
                Rect r = new Rect(
                        MainWindow.Instance.Left,
                        MainWindow.Instance.Top,
                        MainWindow.Instance.Width,
                        MainWindow.Instance.Height);

                await Task.Factory.StartNew(async () =>
                {
                //Do Shutdown Procedures...
                foreach (var vm in TangoIOC.Default.GetAllInstancesByBase<IStudioViewModel>())
                    {
                        try
                        {
                            var result = await vm.OnShutdownRequest();
                            if (!result)
                            {
                                IsShuttingDown = false;
                                return;
                            }
                        }
                        catch (Exception ex)
                        {
                            LogManager.Log(ex, "Error on shutdown request with " + vm.GetType().Name);
                        }
                    }

                    foreach (var vm in TangoIOC.Default.GetAllInstancesByBase<IStudioViewModel>())
                    {
                        vm.OnShuttingDown();
                    }

                    SettingsManager.Default.GetOrCreate<MachineStudioSettings>().LastBounds = r;

                    try
                    {
                        SettingsManager.Default.Save();
                    }
                    catch (Exception ex)
                    {
                        LogManager.Log(ex, "Error saving settings.");
                    }

                    _navigationManager.NavigateTo(NavigationView.ShutdownView);

                    Thread.Sleep(1500);

                    foreach (var window in _openedWindows)
                    {
                        ThreadsHelper.InvokeUI(() =>
                        {
                            window.Close();
                        });
                    }

                    try
                    {
                        if (ConnectedMachine != null)
                        {
                            ConnectedMachine.Disconnect().Wait();
                        }
                    }
                    catch (Exception ex)
                    {
                        LogManager.Log(ex, "Error disconnecting from machine.");
                    }

                    var eventLogger = TangoIOC.Default.GetInstance<IEventLogger>();
                    if (eventLogger != null)
                    {
                        eventLogger.Log(EventTypes.ApplicationTerminated, "Application Terminated!");
                        eventLogger.FlushAll();
                    }

                    Thread.Sleep(1500);

                    Environment.Exit(0);

                });
            }
            catch (Exception ex)
            {
                IsShuttingDown = false;
                LogManager.Log(ex,"An error occurred while shutting down machine studio.");
            }
        }

        /// <summary>
        /// Notify the application manager about an external opened window.
        /// When application exists. All registered windows will be closed.
        /// </summary>
        /// <param name="window">The window.</param>
        public void RegisterOpenedWindow(Window window)
        {
            _openedWindows.Add(window);

            window.Closed += (x, y) => { _openedWindows.Remove(window); };
        }

        /// <summary>
        /// Gets the core libraries version.
        /// </summary>
        public Version CoreVersion
        {
            get
            {
                return typeof(ExtendedObject).Assembly.GetName().Version;
            }
        }

        /// <summary>
        /// Gets the build date.
        /// </summary>
        public string BuildDate
        {
            get
            {
                return AssemblyHelper.GetCurrentAssemblyBuildDate().ToShortDateString();
            }
        }

        /// <summary>
        /// Gets the change log.
        /// </summary>
        public string ChangeLog
        {
            get
            {
                return EmbeddedResourceHelper.GetEmbeddedResourceText("Tango.MachineStudio.UI.ChangeLog.txt");
            }
        }

        public void NotifyApplicationReady()
        {
            TangoIOC.Default.GetAllInstancesByBase<IStudioViewModel>().ToList().ForEach(x => x.OnApplicationReady());
        }
    }
}