From 618f55acbc8593dddb7369abaf144458ca426e6b Mon Sep 17 00:00:00 2001
From: DismissedLight <1686188646@qq.com>
Date: Mon, 22 Jul 2024 22:45:35 +0800
Subject: [PATCH] handle mirror null edge case

---
 .../View/Dialog/UpdatePackageDownloadConfirmDialog.xaml.cs  | 6 +++---
 src/Snap.Hutao/Snap.Hutao/ViewModel/TitleViewModel.cs       | 4 ++--
 2 files changed, 5 insertions(+), 5 deletions(-)

diff --git a/src/Snap.Hutao/Snap.Hutao/UI/Xaml/View/Dialog/UpdatePackageDownloadConfirmDialog.xaml.cs b/src/Snap.Hutao/Snap.Hutao/UI/Xaml/View/Dialog/UpdatePackageDownloadConfirmDialog.xaml.cs
index fdd8e874..66612b9a 100644
--- a/src/Snap.Hutao/Snap.Hutao/UI/Xaml/View/Dialog/UpdatePackageDownloadConfirmDialog.xaml.cs
+++ b/src/Snap.Hutao/Snap.Hutao/UI/Xaml/View/Dialog/UpdatePackageDownloadConfirmDialog.xaml.cs
@@ -15,13 +15,13 @@ internal sealed partial class UpdatePackageDownloadConfirmDialog : ContentDialog
         InitializeComponent();
     }
 
-    public async ValueTask<ValueResult<bool, HutaoPackageMirror>> GetSelectedMirrorAsync()
+    public async ValueTask<ValueResult<bool, HutaoPackageMirror?>> GetSelectedMirrorAsync()
     {
         if (await ShowAsync() is ContentDialogResult.Primary)
         {
-            return new(true, SelectedItem);
+            return new(true, SelectedItem ?? Mirrors?.FirstOrDefault());
         }
 
-        return new(false, default!);
+        return new(false, default);
     }
 }
\ No newline at end of file
diff --git a/src/Snap.Hutao/Snap.Hutao/ViewModel/TitleViewModel.cs b/src/Snap.Hutao/Snap.Hutao/ViewModel/TitleViewModel.cs
index ed49d379..416de7de 100644
--- a/src/Snap.Hutao/Snap.Hutao/ViewModel/TitleViewModel.cs
+++ b/src/Snap.Hutao/Snap.Hutao/ViewModel/TitleViewModel.cs
@@ -98,9 +98,9 @@ internal sealed partial class TitleViewModel : Abstraction.ViewModel
             dialog.Mirrors = checkUpdateResult.PackageInformation?.Mirrors;
             dialog.SelectedItem = dialog.Mirrors?.FirstOrDefault();
 
-            (bool isOk, HutaoPackageMirror mirror) = await dialog.GetSelectedMirrorAsync().ConfigureAwait(false);
+            (bool isOk, HutaoPackageMirror? mirror) = await dialog.GetSelectedMirrorAsync().ConfigureAwait(false);
 
-            if (isOk)
+            if (isOk && mirror is not null)
             {
                 ArgumentNullException.ThrowIfNull(checkUpdateResult.PackageInformation);
                 HutaoSelectedMirrorInformation mirrorInformation = new()