fix: 使用 CommunityToolkit.Mvvm

ViewModels/LibraryViewModel.cs

@@ -1,20 +1,29 @@
 using System.Collections.ObjectModel;
-using CloudPrint.Client.Infrastructure;
 using CloudPrint.Client.Models;
 using CloudPrint.Client.Services;
 using CloudPrint.Client.Services.Abstractions;
+using CommunityToolkit.Mvvm.ComponentModel;
+using CommunityToolkit.Mvvm.Input;
 using Microsoft.Win32;
 
 namespace CloudPrint.Client.ViewModels;
 
-public sealed class LibraryViewModel : ObservableObject
+public sealed partial class LibraryViewModel : ObservableObject
 {
     private readonly IFileService _fileService;
     private readonly IPrintBackendClient _backendClient;
     private readonly ClientSettings _settings;
-    private LibraryCategory? _selectedCategory;
-    private CloudPrintDocument? _selectedDocument;
-    private string _statusMessage = "文库就绪";
+
+    [ObservableProperty]
+    private LibraryCategory? selectedCategory;
+
+    [ObservableProperty]
+    [NotifyCanExecuteChangedFor(nameof(RemoveDocumentCommand))]
+    [NotifyCanExecuteChangedFor(nameof(SyncSelectedCommand))]
+    private CloudPrintDocument? selectedDocument;
+
+    [ObservableProperty]
+    private string statusMessage = "文库就绪";
 
     public LibraryViewModel()
         : this(new FileService(), new GrpcService(), new ClientSettings())
@@ -33,51 +42,18 @@ public sealed class LibraryViewModel : ObservableObject
         Categories.Add(new LibraryCategory { Id = 4, Name = "其他文件", Icon = "📁", SortOrder = 99 });
 
         SelectedCategory = Categories.FirstOrDefault();
-        AddDocumentCommand = new RelayCommand(AddDocument);
-        RemoveDocumentCommand = new RelayCommand(RemoveSelectedDocument, () => SelectedDocument is not null);
-        SyncSelectedCommand = new AsyncRelayCommand(SyncSelectedAsync, () => SelectedDocument is not null && _backendClient.IsConnected);
-        SyncAllCommand = new AsyncRelayCommand(SyncAllAsync, () => Documents.Any(document => !document.IsUploaded) && _backendClient.IsConnected);
     }
 
     public ObservableCollection<LibraryCategory> Categories { get; } = new();
     public ObservableCollection<CloudPrintDocument> Documents { get; } = new();
 
-    public LibraryCategory? SelectedCategory
-    {
-        get => _selectedCategory;
-        set => SetProperty(ref _selectedCategory, value);
-    }
-
-    public CloudPrintDocument? SelectedDocument
-    {
-        get => _selectedDocument;
-        set
-        {
-            if (SetProperty(ref _selectedDocument, value))
-            {
-                RemoveDocumentCommand.RaiseCanExecuteChanged();
-                SyncSelectedCommand.RaiseCanExecuteChanged();
-            }
-        }
-    }
-
-    public string StatusMessage
-    {
-        get => _statusMessage;
-        private set => SetProperty(ref _statusMessage, value);
-    }
-
-    public RelayCommand AddDocumentCommand { get; }
-    public RelayCommand RemoveDocumentCommand { get; }
-    public AsyncRelayCommand SyncSelectedCommand { get; }
-    public AsyncRelayCommand SyncAllCommand { get; }
-
     public void RefreshCommandState()
     {
-        SyncSelectedCommand.RaiseCanExecuteChanged();
-        SyncAllCommand.RaiseCanExecuteChanged();
+        SyncSelectedCommand.NotifyCanExecuteChanged();
+        SyncAllCommand.NotifyCanExecuteChanged();
     }
 
+    [RelayCommand]
     private void AddDocument()
     {
         var dialog = new Microsoft.Win32.OpenFileDialog
@@ -114,7 +90,10 @@ public sealed class LibraryViewModel : ObservableObject
         RefreshCommandState();
     }
 
-    private void RemoveSelectedDocument()
+    private bool CanRemoveDocument() => SelectedDocument is not null;
+
+    [RelayCommand(CanExecute = nameof(CanRemoveDocument))]
+    private void RemoveDocument()
     {
         if (SelectedDocument is null)
         {
@@ -128,6 +107,9 @@ public sealed class LibraryViewModel : ObservableObject
         RefreshCommandState();
     }
 
+    private bool CanSyncSelected() => SelectedDocument is not null && _backendClient.IsConnected;
+
+    [RelayCommand(CanExecute = nameof(CanSyncSelected))]
     private async Task SyncSelectedAsync()
     {
         if (SelectedDocument is null)
@@ -140,6 +122,9 @@ public sealed class LibraryViewModel : ObservableObject
         RefreshCommandState();
     }
 
+    private bool CanSyncAll() => Documents.Any(document => !document.IsUploaded) && _backendClient.IsConnected;
+
+    [RelayCommand(CanExecute = nameof(CanSyncAll))]
     private async Task SyncAllAsync()
     {
         var pendingDocuments = Documents.Where(document => !document.IsUploaded).ToList();
@@ -151,4 +136,4 @@ public sealed class LibraryViewModel : ObservableObject
         StatusMessage = $"已同步 {pendingDocuments.Count} 个文库文件";
         RefreshCommandState();
     }
-}
+}