Improve removal of items

2024-01-13 11:04:33 +00:00
parent b47a563876
commit ff1d400531
16 changed files with 245 additions and 109 deletions
@@ -11,7 +11,10 @@ public partial class MediaInformationViewModel :
    [ObservableProperty]
    private string description = "this is a test description";

-    public MediaInformationViewModel(IServiceFactory serviceFactory, IMediator mediator, IDisposer disposer, ITemplateFactory templateFactory) : base(serviceFactory, mediator, disposer, templateFactory)
+    public MediaInformationViewModel(IServiceFactory serviceFactory, 
+        IMediator mediator, 
+        IDisposer disposer, 
+        ITemplateFactory templateFactory) : base(serviceFactory, mediator, disposer, templateFactory)
    {
    }
 }
@@ -1,11 +1,35 @@
 namespace Hyperbar.Windows.Primary;

-public class ConfigurationChangedHandler :
+public class ConfigurationChangedHandler(IMediator mediator,
+    PrimaryWidgetConfiguration configuration,
+    IViewModelFactory<PrimaryCommandConfiguration, IWidgetComponentViewModel?> factory,
+    IViewModelCache<Guid, IWidgetComponentViewModel> cache) :
    INotificationHandler<ConfigurationChanged<PrimaryWidgetConfiguration>>
 {
-    public ValueTask Handle(ConfigurationChanged<PrimaryWidgetConfiguration> notification, 
+    public async ValueTask Handle(ConfigurationChanged<PrimaryWidgetConfiguration> notification, 
        CancellationToken cancellationToken)
    {
-        throw new NotImplementedException();
+        foreach (KeyValuePair<Guid, IWidgetComponentViewModel> cached in cache)
+        {
+            if (configuration.FirstOrDefault(x => x.Id == cached.Key) == null)
+            {
+                await mediator.PublishAsync(new Removed<IWidgetComponentViewModel>(cached.Value),
+                    cancellationToken);
+
+                cache.Remove(cached.Key);
            }
        }
+
+        foreach (PrimaryCommandConfiguration item in configuration)
+        {
+            
+            //if (!cache.ContainsKey(item.Id))
+            //{
+            //    factory.CreateAsync(item);
+            //}
+            //else
+            //{
+
+            //}
+        }    }
+}
@@ -8,7 +8,7 @@ public class PrimaryWidgetProvider :
 {
    public void Create(HostBuilderContext comtext, IServiceCollection services) =>
            services.AddConfiguration<PrimaryWidgetConfiguration>()
-                .AddTransient<IViewModelCache<Guid, IWidgetComponentViewModel>, ViewModelCache<Guid, IWidgetComponentViewModel>>()
+                .AddSingleton<IViewModelCache<Guid, IWidgetComponentViewModel>, ViewModelCache<Guid, IWidgetComponentViewModel>>()
                .AddTransient<IViewModelFactory<PrimaryCommandConfiguration, IWidgetComponentViewModel?>, WidgetComponentViewModelFactory>()
                .AddTransient<IViewModelEnumerator<IWidgetComponentViewModel>, WidgetComponentViewModelEnumerator>()
                .AddWidgetTemplate<PrimaryWidgetViewModel>()
@@ -1,6 +1,4 @@
-
-
-namespace Hyperbar.Windows.Primary;
+namespace Hyperbar.Windows.Primary;

 public class PrimaryWidgetViewModel(ITemplateFactory templateFactory,
    IServiceFactory serviceFactory,
@@ -4,11 +4,11 @@ public class WidgetComponentViewModelEnumerator(PrimaryWidgetConfiguration confi
    IViewModelFactory<PrimaryCommandConfiguration, IWidgetComponentViewModel?> factory) :
    IViewModelEnumerator<IWidgetComponentViewModel>
 {
-    public async IAsyncEnumerable<IWidgetComponentViewModel?> Next()
+    public IEnumerable<IWidgetComponentViewModel?> Next()
    {
        foreach (PrimaryCommandConfiguration item in configuration)
        {
-            yield return await factory.CreateAsync(item);
+            yield return factory.Create(item);
        }
    }
 }
@@ -7,9 +7,9 @@ public class WidgetComponentViewModelFactory(IServiceFactory service,
    IViewModelCache<Guid, IWidgetComponentViewModel> cache) :
    IViewModelFactory<PrimaryCommandConfiguration, IWidgetComponentViewModel?>
 {
-    public async ValueTask<IWidgetComponentViewModel?> CreateAsync(PrimaryCommandConfiguration value)
+    public IWidgetComponentViewModel? Create(PrimaryCommandConfiguration value)
    {
-        IWidgetComponentViewModel? viewModel = null;
+        IWidgetComponentViewModel? viewModel = default;

        if (value is KeyAcceleratorCommandConfiguration keyAcceleratorCommand)
        {
@@ -31,6 +31,6 @@ public class WidgetComponentViewModelFactory(IServiceFactory service,
            cache.Add(value.Id, viewModel);
        }

-        return viewModel ?? default;
+        return viewModel;
    }
 }
@@ -7,6 +7,6 @@
 	<ItemGroup>
 		<PackageReference Include="CommunityToolkit.Mvvm" Version="8.2.2" />
 		<PackageReference Include="Microsoft.Extensions.Hosting" Version="8.0.0" />
-		<PackageReference Include="System.Reactive" Version="6.0.0" />
+		<PackageReference Include="System.Reactive" Version="5.0.0" />
 	</ItemGroup>
 </Project>
@@ -0,0 +1,8 @@
+namespace Hyperbar;
+
+public interface IViewModelCache<TKey, TViewModel> : 
+    IDictionary<TKey, TViewModel> 
+    where TKey : notnull
+{
+
+}
@@ -2,29 +2,5 @@

 public interface IViewModelFactory<TParameter, TViewModel>
 {
-    ValueTask<TViewModel> CreateAsync(TParameter value);
-}
-
-public interface IViewModelCache<TKey, TViewModel>
-{
-    void Add(TKey key, TViewModel value);
-
-    void Remove(TKey key);
-}
-
-public class ViewModelCache<TKey, TViewModel> :
-    IViewModelCache<TKey, TViewModel>
-{
-    private readonly Dictionary<TKey, TViewModel> cache = [];
-
-    public void Add(TKey key, 
-        TViewModel value)
-    {
-        cache.TryAdd(key, value);
-    }
-
-    public void Remove(TKey key)
-    {
-        cache.Remove(key);
-    }
+    TViewModel? Create(TParameter value);
 }
@@ -0,0 +1,83 @@
+using System.Collections;
+using System.Diagnostics.CodeAnalysis;
+using System.Reactive.Disposables;
+
+namespace Hyperbar;
+
+public class ViewModelCache<TKey, TViewModel>(IDisposer disposer) :
+    IViewModelCache<TKey, TViewModel>
+    where TKey : notnull
+{
+    private readonly IDictionary<TKey, TViewModel> cache = new Dictionary<TKey, TViewModel>();
+
+    public TViewModel this[TKey key] 
+    {
+        get => cache[key]; 
+        set => cache[key] = value; 
+    }
+
+    public ICollection<TKey> Keys => cache.Keys;
+
+    public ICollection<TViewModel> Values => cache.Values;
+
+    public int Count => cache.Count;
+
+    public bool IsReadOnly => false;
+
+    public void Add(TKey key, TViewModel value)
+    {
+        disposer.Add(value!, Disposable.Create(() =>
+        {
+            Remove(key);
+        }));
+        
+        cache.Add(key, value);
+    }
+
+    public void Add(KeyValuePair<TKey, TViewModel> item)
+    {
+        cache.Add(item);
+    }
+
+    public void Clear() => cache.Clear();
+
+    public bool Contains(KeyValuePair<TKey, TViewModel> item)
+    {
+        return cache.Contains(item);
+    }
+
+    public bool ContainsKey(TKey key)
+    {
+        return cache.ContainsKey(key);
+    }
+
+    public void CopyTo(KeyValuePair<TKey, TViewModel>[] array, int arrayIndex)
+    {
+         cache.CopyTo(array, arrayIndex);
+    }
+
+    public IEnumerator<KeyValuePair<TKey, TViewModel>> GetEnumerator()
+    {
+        return cache.GetEnumerator();
+    }
+
+    public bool Remove(TKey key)
+    {
+        return cache.Remove(key);
+    }
+
+    public bool Remove(KeyValuePair<TKey, TViewModel> item)
+    {
+        return cache.Remove(item); 
+    }
+
+    public bool TryGetValue(TKey key, [MaybeNullWhen(false)] out TViewModel value)
+    {
+        return cache.TryGetValue(key, out value);
+    }
+
+    IEnumerator IEnumerable.GetEnumerator()
+    {
+        return cache.GetEnumerator();
+    }
+}
@@ -8,7 +8,7 @@ public class Mediator(IServiceProvider provider) :
 {
    private readonly ConditionalWeakTable<dynamic, Type> subjects = [];

-    public ValueTask PublishAsync<TNotification>(TNotification notification,
+    public async ValueTask PublishAsync<TNotification>(TNotification notification,
        CancellationToken cancellationToken = default)
        where TNotification :
        INotification
@@ -26,10 +26,8 @@ public class Mediator(IServiceProvider provider) :

        foreach (INotificationHandler<TNotification> handler in handlers)
        {
-            return  handler.Handle(notification, cancellationToken);
+            await handler.Handle(notification, cancellationToken);
        }
-
-        return default;
    }

    public ValueTask<TResponse> SendAsync<TResponse>(IRequest<TResponse> request,
@@ -2,5 +2,5 @@

 public interface IViewModelEnumerator<TItem>
 {
-    IAsyncEnumerable<TItem?> Next();
+    IEnumerable<TItem?> Next();
 }
@@ -14,10 +14,9 @@ public partial class ObservableCollectionViewModel<TItem> :
 {
    public ObservableCollection<TItem> collection = [];
    private readonly SynchronizationContext? context;
+    private readonly IDisposer disposer;
    private readonly IViewModelEnumerator<TItem>? enumerator;
    private readonly IServiceFactory serviceFactory;
-    private readonly IDisposer disposer;
-
    public ObservableCollectionViewModel(IServiceFactory serviceFactory,
        IMediator mediator,
        IDisposer disposer)
@@ -49,16 +48,13 @@ public partial class ObservableCollectionViewModel<TItem> :
        
        if (enumerator is not null)
        {
-            Task.Run(async () =>
-            {
-                await foreach (TItem? item in enumerator.Next())
+            foreach (TItem? item in enumerator.Next())
            {
                if (item is not null)
                {
                    Add(item);
                }
            }
-            });
        }
    }

@@ -150,15 +146,27 @@ public partial class ObservableCollectionViewModel<TItem> :
        TItem
    {
        T? item = serviceFactory.Create<T>();
-        context?.Post(state => Add(item), null);
+        Add(item);

        return item;
    }

    public void Add(TItem item)
    {
+        context?.Post(state =>
+        {
+            disposer.Add(this, item);
+            disposer.Add(item, Disposable.Create(item, args =>
+            {
+                if (Contains(args))
+                {
+                    Remove(args);
+                }
+            }));
+
            int index = collection.Count;
            InsertItem(index, item);
+        }, null);
    }

    int IList.Add(object? value)
@@ -182,27 +190,35 @@ public partial class ObservableCollectionViewModel<TItem> :
    {
        foreach (TItem? item in items)
        {
-            context?.Post(state => Add(item), null);
+            Add(item);
        }
    }

    public void Clear() => ClearItems();

-    public bool Contains(TItem item) => collection.Contains(item);
+    public bool Contains(TItem item) => 
+        collection.Contains(item);

-    bool IList.Contains(object? value) => IsCompatibleObject(value) && Contains((TItem)value!);
+    bool IList.Contains(object? value) =>
+        IsCompatibleObject(value) && Contains((TItem)value!);

-    public void CopyTo(TItem[] array, int index) => collection.CopyTo(array, index);
+    public void CopyTo(TItem[] array, int index) => 
+        collection.CopyTo(array, index);

-    void ICollection.CopyTo(Array array, int index) => collection.CopyTo((TItem[])array, index);
+    void ICollection.CopyTo(Array array, int index) =>
+        collection.CopyTo((TItem[])array, index);

-    public IEnumerator<TItem> GetEnumerator() => collection.GetEnumerator();
+    public IEnumerator<TItem> GetEnumerator() => 
+        collection.GetEnumerator();

-    IEnumerator IEnumerable.GetEnumerator() => ((IEnumerable)collection).GetEnumerator();
+    IEnumerator IEnumerable.GetEnumerator() => 
+        ((IEnumerable)collection).GetEnumerator();

    public int IndexOf(TItem item) => collection.IndexOf(item);

-    int IList.IndexOf(object? value) => IsCompatibleObject(value) ? IndexOf((TItem)value!) : -1;
+    int IList.IndexOf(object? value) => 
+        IsCompatibleObject(value) ? 
+        IndexOf((TItem)value!) : -1;

    public Task InitializeAsync()
    {
@@ -215,9 +231,11 @@ public partial class ObservableCollectionViewModel<TItem> :
        return Task.CompletedTask;
    }

-    public void Insert(int index, TItem item) => InsertItem(index, item);
+    public void Insert(int index, TItem item) => 
+        InsertItem(index, item);

-    void IList.Insert(int index, object? value)
+    void IList.Insert(int index,
+        object? value)
    {
        if (value is TItem item)
        {
@@ -229,7 +247,13 @@ public partial class ObservableCollectionViewModel<TItem> :
    {
        int index = collection.IndexOf(item);
        if (index < 0) return false;
-        RemoveItem(index);
+
+        context?.Post(state =>
+        {
+            context?.Post(state => RemoveItem(index), null);
+
+        }, null);
+
        return true;
    }

@@ -241,32 +265,23 @@ public partial class ObservableCollectionViewModel<TItem> :
        }
    }

-    public void RemoveAt(int index) => RemoveItem(index);
+    public void RemoveAt(int index) =>
+        RemoveItem(index);

-    protected virtual void ClearItems() => collection.Clear();
+    protected virtual void ClearItems() => 
+        collection.Clear();

-    protected virtual void InsertItem(int index, TItem value)
-    {
-        if (value is TItem item)
-        {
-            disposer.Add(item, Disposable.Create(() =>
-            {
-                if (Contains(item))
-                {
-                    Remove(item);
-                }
-            }));
+    protected virtual void InsertItem(int index,
+        TItem value) => collection.Insert(index, value);

-            context?.Post(state => collection.Insert(index, item), null);
-        }
-    }
+    protected virtual void RemoveItem(int index) => 
+        collection.RemoveAt(index);

-    protected virtual void RemoveItem(int index) => collection.RemoveAt(index);
+    protected virtual void SetItem(int index, TItem item) => 
+        collection[index] = item;

-    protected virtual void SetItem(int index, TItem item) => collection[index] = item;
-
-    private static bool IsCompatibleObject(object? value) => (value is TItem) || 
-        (value == null && default(TItem) == null);
+    private static bool IsCompatibleObject(object? value) => 
+        (value is TItem) || (value == null && default(TItem) == null);

    private void OnCollectionChanged(object? sender, NotifyCollectionChangedEventArgs args) => 
        CollectionChanged?.Invoke(this, args);
@@ -0,0 +1,12 @@
+using CommunityToolkit.Mvvm.ComponentModel;
+
+namespace Hyperbar;
+
+public class ObservableViewModel(IServiceFactory serviceFactory,
+    IMediator mediator,
+    IDisposer disposer) : 
+    ObservableObject,
+    IDisposable
+{
+    public void Dispose() => disposer.Dispose(this);
+}
@@ -7,13 +7,10 @@ public partial class WidgetButtonViewModel(IServiceFactory serviceFactory,
    IMediator mediator,
    IDisposer disposer,
    ITemplateFactory templateFactory,
-    Guid id = default,
+    Guid guid = default,
    string? icon = null,
-    RelayCommand? command = null) : WidgetComponentViewModel(serviceFactory, mediator, disposer, templateFactory)
+    RelayCommand? command = null) : WidgetComponentViewModel(serviceFactory, mediator, disposer, templateFactory, guid)
 {
-    [ObservableProperty]
-    private Guid id = id;
-
    [ObservableProperty]
    private string? icon = icon;

@@ -2,21 +2,43 @@

 namespace Hyperbar;

-public class ObservableViewModel(IServiceFactory serviceFactory,
-    IMediator mediator,
-    IDisposer disposer) : 
-    ObservableObject,
-    IDisposable
+public partial class WidgetComponentViewModel :
+    ObservableViewModel,
+    IWidgetComponentViewModel,
+    ITemplatedViewModel,
+    INotificationHandler<Removed<IWidgetComponentViewModel>>
 {
-    public void Dispose() => disposer.Dispose(this);
-}
+    private readonly IMediator mediator;
+    private readonly IServiceFactory serviceFactory;

-public partial class WidgetComponentViewModel(IServiceFactory serviceFactory,
+    [ObservableProperty]
+    private Guid id;
+
+    public WidgetComponentViewModel(IServiceFactory serviceFactory,
        IMediator mediator,
        IDisposer disposer,
-    ITemplateFactory templateFactory) : ObservableViewModel(serviceFactory, mediator, disposer),
-    IWidgetComponentViewModel,
-    ITemplatedViewModel
+        ITemplateFactory templateFactory,
+        Guid id = default) : base(serviceFactory, mediator, disposer)
    {
-    public ITemplateFactory TemplateFactory => templateFactory;
+        this.serviceFactory = serviceFactory;
+        this.mediator = mediator;
+        this.id = id;
+
+        TemplateFactory = templateFactory;
+
+        mediator.Subscribe(this);
+    }
+
+    public ITemplateFactory TemplateFactory { get; private set; }
+
+    public ValueTask Handle(Removed<IWidgetComponentViewModel> notification,
+        CancellationToken cancellationToken)
+    {
+        if (notification.Value.Equals(this))
+        {
+            Dispose();
+        }
+
+        return ValueTask.CompletedTask;
+    }
 }