vault unlocking WIP

Toolkit.Avalonia/AvaloniaDispatcher.cs

@@ -6,8 +6,5 @@ namespace Toolkit.Avalonia;
 public class AvaloniaDispatcher :
     IDispatcher
 {
-    public async Task InvokeAsync(Action action)
+    public async Task Invoke(Action action) => await Dispatcher.UIThread.InvokeAsync(action);
-    {
-        await Dispatcher.UIThread.InvokeAsync(action);
-    }
 }

Toolkit.Avalonia/ContentDialogHandler.cs

@@ -79,7 +79,7 @@ public class ContentDialogHandler(IDispatcher dispatcher) :
                         async void DeactivateHandler(object? sender, EventArgs args)
                         {
                             deactivatable.DeactivateHandler -= DeactivateHandler;
-                            await dispatcher.InvokeAsync(contentDialog.Hide);
+                            await dispatcher.Invoke(contentDialog.Hide);
                         }
 
                         deactivatable.DeactivateHandler += DeactivateHandler;

Toolkit.Foundation/AesDecryptor.cs

@@ -7,22 +7,44 @@ public class AesDecryptor :
 {
     private const int IvSize = 16;
 
-    public byte[] Decrypt(byte[] cipher, byte[] key)
+    public bool TryDecrypt(byte[] cipher,
+        byte[] key, 
+        out byte[]? decryptedData)
     {
-        Span<byte> iv = cipher.AsSpan(0, IvSize);
+        decryptedData = null;
-        ReadOnlySpan<byte> encryptedContent = cipher.AsSpan(IvSize);
 
-        using Aes aes = Aes.Create();
+        if (cipher is null || key is null || cipher.Length < IvSize)
-        aes.Key = key;
+        {
-        aes.IV = iv.ToArray();
+            return false;
+        }
 
-        using MemoryStream memoryStream = new(encryptedContent.ToArray());
+        try
-        using ICryptoTransform decryptor = aes.CreateDecryptor(aes.Key, aes.IV);
+        {
-        using CryptoStream cryptoStream = new(memoryStream, decryptor, CryptoStreamMode.Read);
+            Span<byte> iv = cipher.AsSpan(0, IvSize);
+            ReadOnlySpan<byte> encryptedContent = cipher.AsSpan(IvSize);
 
-        using MemoryStream resultStream = new();
+            using Aes aes = Aes.Create();
-        cryptoStream.CopyTo(resultStream);
+            aes.Key = key;
+            aes.IV = iv.ToArray();
 
-        return resultStream.ToArray();
+            using MemoryStream memoryStream = new(encryptedContent.ToArray());
+            using ICryptoTransform decryptor = aes.CreateDecryptor(aes.Key, aes.IV);
+            using CryptoStream cryptoStream = new(memoryStream, decryptor, CryptoStreamMode.Read);
+
+            using MemoryStream resultStream = new();
+            cryptoStream.CopyTo(resultStream);
+
+            decryptedData = resultStream.ToArray();
+
+            return true;
+        }
+        catch (CryptographicException)
+        {
+            return false;
+        }
+        catch (Exception)
+        {
+            return false;
+        }
     }
 }

Toolkit.Foundation/AesEncryptor.cs

@@ -7,28 +7,43 @@ public class AesEncryptor :
 {
     private const int IvSize = 16;
 
-    public byte[] Encrypt(byte[] data, 
+    public bool TryEncrypt(byte[] data, 
-        byte[] key)
+        byte[] key,
+        out byte[]? encryptedData)
     {
-        if (key.Length != 32)
+        encryptedData = null;
+
+        if (data is null || key is null || key.Length != 32)
         {
-            throw new ArgumentException("Key must be 256 bits (32 bytes).");
+            return false;
         }
 
-        using Aes aes = Aes.Create();
+        try
-        aes.Key = key;
-        aes.GenerateIV();
-
-        using MemoryStream memoryStream = new();
-        memoryStream.Write(aes.IV.AsSpan(0, IvSize));
-
-        using (ICryptoTransform encryptor = aes.CreateEncryptor(aes.Key, aes.IV))
-        using (CryptoStream cryptoStream = new(memoryStream, encryptor, CryptoStreamMode.Write))
         {
-            cryptoStream.Write(data, 0, data.Length);
+            using Aes aes = Aes.Create();
-            cryptoStream.FlushFinalBlock();
+            aes.Key = key;
-        }
+            aes.GenerateIV();
 
-        return memoryStream.ToArray();
+            using MemoryStream memoryStream = new();
+            memoryStream.Write(aes.IV, 0, IvSize);
+
+            using (ICryptoTransform encryptor = aes.CreateEncryptor(aes.Key, aes.IV))
+            using (CryptoStream cryptoStream = new(memoryStream, encryptor, CryptoStreamMode.Write))
+            {
+                cryptoStream.Write(data, 0, data.Length);
+                cryptoStream.FlushFinalBlock();
+            }
+
+            encryptedData = memoryStream.ToArray();
+            return true;
+        }
+        catch (CryptographicException)
+        {
+            return false;
+        }
+        catch (Exception)
+        {
+            return false;
+        }
     }
 }

Toolkit.Foundation/IDecryptor.cs

@@ -1,6 +1,7 @@
 namespace Toolkit.Foundation;
 public interface IDecryptor
 {
-    byte[] Decrypt(byte[] cipher,
+    bool TryDecrypt(byte[] cipher,
-        byte[] key);
+        byte[] key,
+        out byte[]? decryptedData);
 }

Toolkit.Foundation/IDispatcher.cs

@@ -2,5 +2,5 @@
 
 public interface IDispatcher
 {
-    Task InvokeAsync(Action action);
+    Task Invoke(Action action);
 }

Toolkit.Foundation/IEncryptor.cs

@@ -1,5 +1,8 @@
 namespace Toolkit.Foundation;
+
 public interface IEncryptor
 {
-    byte[] Encrypt(byte[] data, byte[] key);
+    bool TryEncrypt(byte[] data,
+        byte[] key,
+        out byte[]? encryptedData);
 }

Toolkit.Foundation/ObservableCollectionViewModel.cs

@@ -412,6 +412,17 @@ public partial class ObservableCollectionViewModel<TViewModel> :
         CollectionChanged?.Invoke(this, args);
 }
 
+public partial class ObservableCollectionViewModel<TValue, TViewModel>(IServiceProvider provider,
+    IServiceFactory factory,
+    IMediator mediator,
+    IPublisher publisher,
+    ISubscriber subscriber, IDisposer disposer) : ObservableCollectionViewModel<TViewModel>(provider, factory, mediator, publisher, subscriber, disposer)
+    where TViewModel : notnull
+{
+    [ObservableProperty]
+    private TValue? value;
+}
+
 public class ObservableCollectionViewModel(IServiceProvider provider,
     IServiceFactory factory,
     IMediator mediator,

Toolkit.Foundation/Publisher.cs

@@ -73,29 +73,29 @@ public class Publisher(ISubscriptionManager subscriptionManager,
     public Task PublishUI<TMessage>(object key,
         CancellationToken cancellationToken = default)
         where TMessage : new() =>
-            Publish(new TMessage(), args => dispatcher.InvokeAsync(async () => await args()),
+            Publish(new TMessage(), args => dispatcher.Invoke(async () => await args()),
                 key, cancellationToken);
 
     public Task PublishUI<TMessage>(TMessage message,
         CancellationToken cancellationToken = default)
         where TMessage : notnull =>
-            Publish(message, args => dispatcher.InvokeAsync(async () => await args()),
+            Publish(message, args => dispatcher.Invoke(async () => await args()),
                 null, cancellationToken);
 
     public Task PublishUI<TMessage>(TMessage message,
         object key,
         CancellationToken cancellationToken = default)
         where TMessage : notnull =>
-            Publish(message, args => dispatcher.InvokeAsync(async () => await args()),
+            Publish(message, args => dispatcher.Invoke(async () => await args()),
                 key, cancellationToken);
 
     public Task PublishUI<TMessage>(CancellationToken cancellationToken = default)
         where TMessage : new() =>
-            Publish(new TMessage(), args => dispatcher.InvokeAsync(async () => await args()),
+            Publish(new TMessage(), args => dispatcher.Invoke(async () => await args()),
                 null, cancellationToken);
 
     public Task PublishUI(object message,
         CancellationToken cancellationToken = default) => Publish(message, args =>
-            dispatcher.InvokeAsync(async () => await args()),
+            dispatcher.Invoke(async () => await args()),
                 null, cancellationToken);
 }