Implemented search results window for AppID search

GoldbergGUI.Core/ViewModels/SearchResultViewModel.cs

@@ -0,0 +1,74 @@
+using System.Collections.Generic;
+using System.Threading.Tasks;
+using GoldbergGUI.Core.Models;
+using MvvmCross.Commands;
+using MvvmCross.Logging;
+using MvvmCross.Navigation;
+using MvvmCross.ViewModels;
+
+namespace GoldbergGUI.Core.ViewModels
+{
+    public class SearchResultViewModel : MvxNavigationViewModel<IEnumerable<SteamApp>>, IMvxViewModel<IEnumerable<SteamApp>, SteamApp>
+    {
+        private readonly IMvxNavigationService _navigationService;
+        private readonly IMvxLog _log;
+        private IEnumerable<SteamApp> _apps;
+
+        public SearchResultViewModel(IMvxLogProvider logProvider, IMvxNavigationService navigationService) : 
+            base(logProvider, navigationService)
+        {
+            _log = logProvider.GetLogFor(typeof(SearchResultViewModel));
+            _navigationService = navigationService;
+        }
+
+        public override void Prepare(IEnumerable<SteamApp> parameter)
+        {
+            Apps = parameter;
+        }
+        
+        public IEnumerable<SteamApp> Apps
+        {
+            get => _apps;
+            set
+            {
+                _apps = value;
+                RaisePropertyChanged(() => Apps);
+            }
+        }
+        
+        public SteamApp Selected
+        {
+            get;
+            set;
+        }
+
+        public IMvxCommand SaveCommand => new MvxAsyncCommand(Save);
+
+        public IMvxCommand CloseCommand => new MvxAsyncCommand(Close);
+
+        public TaskCompletionSource<object> CloseCompletionSource { get; set; }
+
+        public override void ViewDestroy(bool viewFinishing = true)
+        {
+            if (viewFinishing && CloseCompletionSource != null && !CloseCompletionSource.Task.IsCompleted &&
+                !CloseCompletionSource.Task.IsFaulted)
+                CloseCompletionSource?.TrySetCanceled();
+
+            base.ViewDestroy(viewFinishing);
+        }
+
+        private async Task Save()
+        {
+            if (Selected != null)
+            {
+                _log.Info($"Successfully got app {Selected}");
+                await _navigationService.Close(this, Selected).ConfigureAwait(false);
+            }
+        }
+
+        private async Task Close()
+        {
+            await _navigationService.Close(this).ConfigureAwait(false);
+        }
+    }
+}