Handle refresh request

src/AppCommon/FileTime.App.Core/Services/ContainerRefreshHandler.cs

@@ -0,0 +1,50 @@
+using System.Reactive.Linq;
+using FileTime.App.Core.UserCommand;
+using FileTime.App.Core.ViewModels;
+using FileTime.Core.Models;
+using FileTime.Core.Timeline;
+
+namespace FileTime.App.Core.Services;
+
+public class ContainerRefreshHandler : IStartupHandler, IDisposable
+{
+    private readonly List<IDisposable> _refreshSubscriptions = new();
+    private List<FullName> _folders = new();
+
+    public ContainerRefreshHandler(
+        ICommandScheduler commandScheduler,
+        IUserCommandHandlerService userCommandHandlerService,
+        IAppState appState
+    )
+    {
+        _refreshSubscriptions.Add(
+            Observable.CombineLatest(
+                appState.SelectedTab.Select(t => t?.CurrentLocation.Select(l => l?.FullName) ?? Observable.Never<FullName>()).Switch(),
+                appState.SelectedTab.Select(t => t?.CurrentLocation.Select(l => l?.Parent?.Path) ?? Observable.Never<FullName>()).Switch(),
+                appState.SelectedTab.Select(t => t?.CurrentSelectedItem.Select(l => l?.BaseItem?.FullName) ?? Observable.Never<FullName>()).Switch(),
+                (a, b, c) => new[] {a, b, c}
+            ).Subscribe(folders => { _folders = folders.Where(f => f is not null).Cast<FullName>().ToList(); })
+        );
+
+
+        _refreshSubscriptions.Add(
+            commandScheduler.ContainerToRefresh.Subscribe(refreshRequestedIn =>
+            {
+                if (_folders.Contains(refreshRequestedIn))
+                {
+                    userCommandHandlerService.HandleCommandAsync(RefreshCommand.Instance);
+                }
+            })
+        );
+    }
+
+    public void Dispose()
+    {
+        foreach (var refreshSubscription in _refreshSubscriptions)
+        {
+            refreshSubscription.Dispose();
+        }
+    }
+
+    public Task InitAsync() => Task.CompletedTask;
+}