SosLoaderViewModel.cs

using System.Collections.Generic;
using System.ComponentModel;
using System.ComponentModel.Composition;
using System.Runtime.CompilerServices;
using System.Threading.Tasks;
using System.Windows;
using DbgX.Interfaces;
using DbgX.Interfaces.Enums;
using DbgX.Interfaces.Listeners;
using DbgX.Interfaces.Services;
using DbgX.Util;

namespace SosLoader
{
    [RibbonTabGroupExtensionMetadata("HomeRibbonTab", "Help", 0)]
    [Export(typeof(IDbgRibbonTabGroupExtension))]
    [Export(typeof(IDbgCommandExecutionListener))]
    [Export(typeof(IDbgEngineConnectionListener))]
    public class SosLoaderViewModel : IDbgRibbonTabGroupExtension, IDbgCommandExecutionListener, IDbgEngineConnectionListener, INotifyPropertyChanged
    {
        private bool _isLoaded;

        [Import]
        public IDbgConsole _console;

        [Import]
        private IDbgEngineControl _engineControl;

        public SosLoaderViewModel()
        {
            LoadSosCommand = new AsyncDelegateCommand(LoadSos, CanLoadSos);
        }

        public event PropertyChangedEventHandler PropertyChanged;

        public AsyncDelegateCommand LoadSosCommand { get; }

        public IEnumerable<FrameworkElement> Controls => new[] { new SosLoaderButton(this) };

        public bool IsLoaded
        {
            get => _isLoaded;

            set
            {
                _isLoaded = value;
                OnPropertyChanged();
            }
        }

        public void OnCommandExecuted(string command)
        {
            if (command.StartsWith(".loadby sos clr"))
            {
                IsLoaded = true;
            }
        }

        public void OnEngineConnectionChanged(EngineConnectionState state)
        {
            LoadSosCommand.RaiseCanExecuteChanged();
        }

        protected void OnPropertyChanged([CallerMemberName] string propertyName = null)
        {
            PropertyChanged?.Invoke(this, new PropertyChangedEventArgs(propertyName));
        }

        private Task LoadSos()
        {
            return _console.ExecuteCommandAsync(".loadby sos clr");
        }

        private bool CanLoadSos()
        {
            return _engineControl.ConnectionState != EngineConnectionState.NoSession && !IsLoaded;
        }
    }
}