project

2022-03-23 15:44:32 +00:00
commit 2ac0e3ed26
129 changed files with 4197 additions and 0 deletions
@@ -0,0 +1,54 @@
+using System.Reactive.Concurrency;
+using System.Collections.Concurrent;
+using System.Reactive.Linq;
+using System.Reactive.Subjects;
+
+namespace TheXamlGuy.TaskbarGroup.Core
+{
+    public class Messenger : IMessenger
+    {
+        public IEventAggregatorInvoker invoker;
+        private readonly ConcurrentDictionary<Type, object> subjects = new();
+
+        private IScheduler dispatcher;
+
+        public Messenger(IEventAggregatorInvoker invoker)
+        {
+            var synchronizationContext = SynchronizationContext.Current;
+            if (synchronizationContext is null) throw new NullReferenceException(nameof(synchronizationContext));
+
+            this.invoker = invoker;
+
+            dispatcher = new SynchronizationContextScheduler(synchronizationContext);
+        }
+        public ISubject<TMessage> GetSubject<TMessage>()
+        {
+            return (ISubject<TMessage>)subjects.GetOrAdd(typeof(TMessage), type => new BehaviorSubject<TMessage>(default));
+        }
+
+        public void Send<TMessage>() where TMessage : new()
+        {
+            Send(new TMessage());
+        }
+
+        public void Send<TMessage>(TMessage message)
+        {
+            GetSubject<TMessage>().OnNext(message);
+        }
+
+        public IDisposable Subscribe<TMessage>(Action<TMessage> actionDelegate, IScheduler? scheduler = null, Func<TMessage, bool>? where = null)
+        {
+            if (scheduler is null)
+            {
+                scheduler = Scheduler.Default;
+            }
+
+            if (where == null)
+            {
+                where = x => true;
+            }
+
+            return GetSubject<TMessage>().AsObservable().Skip(1).Where(where).ObserveOn(scheduler).WeakSubscribe(invoker, actionDelegate);
+        }
+    }
+}