Optimize and improve the Subject

v2rayN/ServiceLib/Events/AppEvents.cs

@@ -0,0 +1,32 @@
+using System.Reactive;
+
+namespace ServiceLib.Events;
+
+public static class AppEvents
+{
+    public static readonly EventChannel<Unit> ReloadRequested = new();
+    public static readonly EventChannel<bool?> ShowHideWindowRequested = new();
+    public static readonly EventChannel<Unit> AddServerViaScanRequested = new();
+    public static readonly EventChannel<Unit> AddServerViaClipboardRequested = new();
+    public static readonly EventChannel<bool> SubscriptionsUpdateRequested = new();
+
+    public static readonly EventChannel<Unit> ProfilesRefreshRequested = new();
+    public static readonly EventChannel<Unit> SubscriptionsRefreshRequested = new();
+    public static readonly EventChannel<Unit> ProxiesReloadRequested = new();
+    public static readonly EventChannel<ServerSpeedItem> DispatcherStatisticsRequested = new();
+
+    public static readonly EventChannel<string> SendSnackMsgRequested = new();
+    public static readonly EventChannel<string> SendMsgViewRequested = new();
+
+    public static readonly EventChannel<Unit> AppExitRequested = new();
+    public static readonly EventChannel<bool> ShutdownRequested = new();
+
+    public static readonly EventChannel<Unit> AdjustMainLvColWidthRequested = new();
+
+    public static readonly EventChannel<string> SetDefaultServerRequested = new();
+
+    public static readonly EventChannel<Unit> RoutingsMenuRefreshRequested = new();
+    public static readonly EventChannel<Unit> TestServerRequested = new();
+    public static readonly EventChannel<Unit> InboundDisplayRequested = new();
+    public static readonly EventChannel<ESysProxyType> SysProxyChangeRequested = new();
+}

v2rayN/ServiceLib/Events/EventChannel.cs

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+using System.Reactive;
+using System.Reactive.Linq;
+using System.Reactive.Subjects;
+
+namespace ServiceLib.Events;
+
+public sealed class EventChannel<T>
+{
+    private readonly ISubject<T> _subject = Subject.Synchronize(new Subject<T>());
+
+    public IObservable<T> AsObservable()
+    {
+        return _subject.AsObservable();
+    }
+
+    public void Publish(T value)
+    {
+        _subject.OnNext(value);
+    }
+
+    public void Publish()
+    {
+        if (typeof(T) != typeof(Unit))
+        {
+            throw new InvalidOperationException("Publish() without value is only valid for EventChannel<Unit>.");
+        }
+        _subject.OnNext((T)(object)Unit.Default);
+    }
+}