#137 if no write permissions, use ApplicationData folder

Author: Ruben2776

src/PicView.Core/Config/SettingsHelper.cs

@@ -24,21 +24,19 @@ public static async Task LoadSettingsAsync()
             var path = Path.Combine(AppDomain.CurrentDomain.BaseDirectory, "Config/UserSettings.json");
             if (File.Exists(path))
             {
-                await PerformRead(path).ConfigureAwait(false);
-            }
-            else
-            {
-                // TODO test saving location for macOS https://johnkoerner.com/csharp/special-folder-values-on-windows-versus-mac/
-                var appData = Path.Combine(Environment.GetFolderPath(Environment.SpecialFolder.ApplicationData), "Ruben2776/PicView/Config/UserSettings.json");
-                if (File.Exists(appData))
+                try
                 {
-                    await PerformRead(appData).ConfigureAwait(false);
+                    await PerformRead(path).ConfigureAwait(false);
                 }
-                else
+                catch (Exception)
                 {
-                    SetDefaults();
+                    await Retry().ConfigureAwait(false);
                 }
             }
+            else
+            {
+                await Retry().ConfigureAwait(false);
+            }
         }
         catch (Exception ex)
         {
@@ -47,6 +45,28 @@ public static async Task LoadSettingsAsync()
 #endif
             SetDefaults();
         }
+        return;
+
+        async Task Retry()
+        {
+            // TODO test saving location for macOS https://johnkoerner.com/csharp/special-folder-values-on-windows-versus-mac/
+            var appData = Path.Combine(Environment.GetFolderPath(Environment.SpecialFolder.ApplicationData), "Ruben2776/PicView/Config/UserSettings.json");
+            if (File.Exists(appData))
+            {
+                try
+                {
+                    await PerformRead(appData).ConfigureAwait(false);
+                }
+                catch (Exception)
+                {
+                    SetDefaults();
+                }
+            }
+            else
+            {
+                SetDefaults();
+            }
+        }
     }
 
     private static void SetDefaults()

src/PicView.Core/Navigation/FileHistory.cs

@@ -1,4 +1,5 @@
 using System.Diagnostics;
+using System.Runtime;
 
 namespace PicView.Core.Navigation;
 
@@ -28,6 +29,14 @@ public FileHistory()
         }
         catch (Exception e)
         {
+            try
+            {
+                _fileLocation = Path.Combine(Environment.GetFolderPath(Environment.SpecialFolder.ApplicationData), "Ruben2776/PicView/Config/recent.txt");
+            }
+            catch (Exception)
+            {
+                Trace.WriteLine($"{nameof(FileHistory)} exception, \n{e.Message}");
+            }
 #if DEBUG
             Trace.WriteLine($"{nameof(FileHistory)} exception, \n{e.Message}");
 #endif

src/PicView.WPF/App.xaml.cs

@@ -9,8 +9,20 @@ public partial class App
 {
     protected override void OnStartup(StartupEventArgs e)
     {
-        ProfileOptimization.SetProfileRoot(Path.Combine(AppDomain.CurrentDomain.BaseDirectory, "Config/"));
-        ProfileOptimization.StartProfile("ProfileOptimization");
+        Task.Run((() =>
+        {
+            try
+            {
+                ProfileOptimization.SetProfileRoot(Path.Combine(AppDomain.CurrentDomain.BaseDirectory, "Config/"));
+                ProfileOptimization.StartProfile("ProfileOptimization");
+            }
+            catch (Exception)
+            {
+                ProfileOptimization.SetProfileRoot(Path.Combine(Environment.GetFolderPath(Environment.SpecialFolder.ApplicationData), "Ruben2776/PicView/Config/"));
+                ProfileOptimization.StartProfile("ProfileOptimization");
+            }
+        }));
+
         DispatcherUnhandledException += App_DispatcherUnhandledException;
     }
 

src/PicView.WPF/ChangeImage/FileHistoryNavigation.cs

@@ -52,7 +52,10 @@ internal static async Task OpenLastFileAsync()
     {
         if (File.Exists(Path.Combine(AppDomain.CurrentDomain.BaseDirectory, "Config/recent.txt")) == false)
         {
-            return;
+            if (File.Exists(Path.Combine(Environment.GetFolderPath(Environment.SpecialFolder.ApplicationData), "Ruben2776/PicView/Config/recent.txt")) == false)
+            {
+                return;
+            }
         }
 
         await ConfigureWindows.GetMainWindow.Dispatcher.InvokeAsync(() =>

src/PicView.WPF/ChangeImage/FileUpdateNavigation.cs

@@ -1,7 +1,6 @@
 using PicView.Core.Config;
 using PicView.Core.FileHandling;
 using PicView.Core.Gallery;
-using PicView.Core.Navigation;
 using PicView.WPF.FileHandling;
 using PicView.WPF.ImageHandling;
 using PicView.WPF.PicGallery;