wip

2024-11-24 16:35:00 +00:00
parent 911ed375b4
commit d893335195
18 changed files with 282 additions and 200 deletions
@@ -0,0 +1,76 @@
+using CommunityToolkit.Mvvm.Messaging;
+
+namespace Toolkit.Foundation;
+
+public partial class ObservableConfigurationCollection<TConfiguration, TValue, TViewModel> :
+    ObservableCollection<TValue, TViewModel>,
+    IHandler<ChangedEventArgs<TConfiguration>>
+    where TConfiguration : class
+    where TViewModel : notnull,
+    IDisposable
+{
+    private readonly TConfiguration configuration;
+    private readonly Func<TConfiguration, TValue?> read;
+    private readonly Action<TValue?, TConfiguration> write;
+    private readonly IWritableConfiguration<TConfiguration> writer;
+
+    public ObservableConfigurationCollection(IServiceProvider provider,
+        IServiceFactory factory,
+        IMessenger messenger,
+        IDisposer disposer,
+        TConfiguration configuration,
+        IWritableConfiguration<TConfiguration> writer,
+        Func<TConfiguration, TValue?> read,
+        Action<TValue?, TConfiguration> write,
+        TValue? value = default) : base(provider, factory, messenger, disposer, value)
+    {
+        this.configuration = configuration;
+        this.writer = writer;
+        this.read = read;
+        this.write = write;
+
+        Value = value;
+    }
+
+    public ObservableConfigurationCollection(IServiceProvider provider,
+        IServiceFactory factory,
+        IMessenger messenger,
+        IDisposer disposer,
+        IEnumerable<TViewModel> items,
+        TConfiguration configuration,
+        IWritableConfiguration<TConfiguration> writer,
+        Func<TConfiguration, TValue?> read,
+        Action<TValue?, TConfiguration> write,
+        TValue? value = default) : base(provider, factory, messenger, disposer, items, value)
+    {
+        this.configuration = configuration;
+        this.writer = writer;
+        this.read = read;
+        this.write = write;
+
+        Value = value;
+    }
+
+    public void Handle(ChangedEventArgs<TConfiguration> args)
+    {
+        if (args.Sender is TConfiguration configuration)
+        {
+            Value = read(configuration);
+        }
+    }
+
+    protected override void Activated()
+    {
+        Value = read(configuration);
+    }
+
+    protected override void OnChanged(TValue? value)
+    {
+        if (IsActive)
+        {
+            writer.Write(args => write(value, args));
+        }
+
+        base.OnChanged(value);
+    }
+}