Refactor file picker method

(partially)
it's not working

Author: Lamparter

src/Files.App/ViewModels/Properties/HashesViewModel.cs

@@ -1,4 +1,4 @@
-// Copyright (c) Files Community
+// Copyright (c) Files Community
 // Licensed under the MIT License.
 
 using Files.Shared.Helpers;
@@ -10,6 +10,7 @@ namespace Files.App.ViewModels.Properties
 {
 	public sealed partial class HashesViewModel : ObservableObject, IDisposable
 	{
+		private ICommonDialogService CommonDialogService { get; } = Ioc.Default.GetRequiredService<ICommonDialogService>();
 		private IUserSettingsService UserSettingsService { get; } = Ioc.Default.GetService<IUserSettingsService>()!;
 
 		private HashInfoItem _selectedItem;
@@ -132,6 +133,28 @@ public bool CompareHash(string algorithm, string hashToCompare)
 			return hashInfoItem.HashValue.Equals(hashToCompare, StringComparison.OrdinalIgnoreCase);
 		}
 
+		public async Task<bool> CompareFileAsync()
+		{
+			var result = CommonDialogService.Open_FileOpenDialog(MainWindow.Instance.WindowHandle, false, [], Environment.SpecialFolder.Desktop, out var toCompare);
+
+			if (!result)
+			{
+				return false;
+			}
+
+			var file = await StorageHelpers.ToStorageItem<BaseStorageFolder>(toCompare);
+
+			if (file is not null)
+			{
+				var selectedFileHash = await CalculateSHA384HashAsync(file.Path);
+				var compare = CompareHash("SHA384", selectedFileHash);
+
+				return compare;
+			}
+
+			return false;
+		}
+
 		public string FindMatchingAlgorithm(string hash)
 		{
 			if (string.IsNullOrEmpty(hash))

src/Files.App/Views/Properties/HashesPage.xaml.cs

@@ -80,30 +80,20 @@ private void HashInputTextBox_TextChanged(object sender, TextChangedEventArgs e)
 
 		private async void CompareFileButton_Click(object sender, RoutedEventArgs e)
 		{
-			var picker = new Windows.Storage.Pickers.FileOpenPicker();
-			picker.SuggestedStartLocation = Windows.Storage.Pickers.PickerLocationId.Desktop;
-			picker.FileTypeFilter.Add("*");
-			WinRT.Interop.InitializeWithWindow.Initialize(picker, MainWindow.Instance.WindowHandle);
+			var result = await HashesViewModel.CompareFileAsync();
 
-			var file = await picker.PickSingleFileAsync();
-			if (file != null)
+			if (result)
 			{
-				var selectedFileHash = await HashesViewModel.CalculateSHA384HashAsync(file.Path);
-				var currentFileHash = HashesViewModel.Hashes.FirstOrDefault(h => h.Algorithm == "SHA384")?.HashValue;
-				HashInputTextBox.Text = selectedFileHash;
-				if (selectedFileHash == currentFileHash)
-				{
-					HashMatchInfoBar.Severity = InfoBarSeverity.Success; // Check mark
-					HashMatchInfoBar.Title = Strings.HashesMatch.GetLocalizedResource();
-				}
-				else
-				{
-					HashMatchInfoBar.Severity = InfoBarSeverity.Error; // Cross mark
-					HashMatchInfoBar.Title = Strings.HashesMatch.GetLocalizedResource();
-				}
-
-				HashMatchInfoBar.IsOpen = true;
+				HashMatchInfoBar.Severity = InfoBarSeverity.Success; // Check mark
+				HashMatchInfoBar.Title = Strings.HashesMatch.GetLocalizedResource();
+			}
+			else
+			{
+				HashMatchInfoBar.Severity = InfoBarSeverity.Error; // Cross mark
+				HashMatchInfoBar.Title = "no";
 			}
+
+			HashMatchInfoBar.IsOpen = true;
 		}
 
 		private void MenuFlyout_Closing(FlyoutBase sender, FlyoutBaseClosingEventArgs e)