Frequency navigation

src/AppCommon/FileTime.App.FrequencyNavigation/ViewModels/FrequencyNavigationViewModel.cs

@@ -1,15 +1,22 @@
+using Avalonia.Input;
+using FileTime.App.Core.Services;
+using FileTime.App.Core.UserCommand;
 using FileTime.App.Core.ViewModels;
 using FileTime.App.FrequencyNavigation.Services;
+using FileTime.Core.Models;
+using FileTime.Core.Timeline;
 using MvvmGen;
 
 namespace FileTime.App.FrequencyNavigation.ViewModels;
 
 [ViewModel]
 [Inject(typeof(IFrequencyNavigationService), "_frequencyNavigationService")]
+[Inject(typeof(IUserCommandHandlerService), "_userCommandHandlerService")]
+[Inject(typeof(ITimelessContentProvider), "_timelessContentProvider")]
 public partial class FrequencyNavigationViewModel : IFrequencyNavigationViewModel
 {
     private string _searchText;
-    
+
     [Property] private IObservable<bool> _showWindow;
     [Property] private List<string> _filteredMatches;
     [Property] private string _selectedItem;
@@ -20,7 +27,7 @@ public partial class FrequencyNavigationViewModel : IFrequencyNavigationViewMode
         set
         {
             if (_searchText == value) return;
-            
+
             _searchText = value;
             OnPropertyChanged();
 
@@ -29,18 +36,48 @@ public partial class FrequencyNavigationViewModel : IFrequencyNavigationViewMode
     }
 
     public void Close()
+        => _frequencyNavigationService.CloseNavigationWindow();
+
+    public async void HandleKeyDown(KeyEventArgs keyEventArgs)
     {
-        _frequencyNavigationService.CloseNavigationWindow();
+        if (keyEventArgs.Key == Key.Down)
+        {
+            var nextItem = FilteredMatches.SkipWhile(i => i != SelectedItem).Skip(1).FirstOrDefault();
+
+            if (nextItem is not null)
+            {
+                SelectedItem = nextItem;
+            }
+        }
+        else if (keyEventArgs.Key == Key.Up)
+        {
+            var previousItem = FilteredMatches.TakeWhile(i => i != SelectedItem).LastOrDefault();
+
+            if (previousItem is not null)
+            {
+                SelectedItem = previousItem;
+            }
+        }
+        else if (keyEventArgs.Key == Key.Enter)
+        {
+            var targetContainer = await _timelessContentProvider.GetItemByFullNameAsync(new FullName(SelectedItem), PointInTime.Present);
+            var openContainerCommand = new OpenContainerCommand(new AbsolutePath(_timelessContentProvider, targetContainer));
+            await _userCommandHandlerService.HandleCommandAsync(openContainerCommand);
+            Close();
+        }
     }
 
     partial void OnInitialize()
-    {
-        _showWindow = _frequencyNavigationService.ShowWindow;
-    }
+        => _showWindow = _frequencyNavigationService.ShowWindow;
 
     private void UpdateFilteredMatches()
     {
         FilteredMatches = new List<string>(_frequencyNavigationService.GetMatchingContainers(_searchText));
+        if (FilteredMatches.Contains(SelectedItem)) return;
+
+        SelectedItem = FilteredMatches.Count > 0
+            ? FilteredMatches[0]
+            : null;
     }
 
     string IModalViewModel.Name => "FrequencyNavigation";