[CHANGE] Service extended and events

Manager.App/Extensions/AsyncEnumerableExtensions.cs

@@ -0,0 +1,48 @@
+using System.Threading.Channels;
+
+namespace Manager.App.Extensions;
+
+public static class AsyncEnumerableExtensions
+{
+    public static async IAsyncEnumerable<T> Merge<T>(IEnumerable<IAsyncEnumerable<T>> sources, [System.Runtime.CompilerServices.EnumeratorCancellation] CancellationToken cancellationToken = default)
+    {
+        var channel = Channel.CreateUnbounded<T>( new UnboundedChannelOptions { SingleReader = true, SingleWriter = false });
+        
+        var writerTasks = sources.Select(source => Task.Run(async () =>
+        {
+            try
+            {
+                await foreach (var item in source.WithCancellation(cancellationToken))
+                {
+                    await channel.Writer.WriteAsync(item, cancellationToken);
+                }
+            }
+            catch (OperationCanceledException)
+            {
+                
+            }
+            catch (Exception ex)
+            {
+                channel.Writer.TryComplete(ex);
+            }
+        }, cancellationToken)).ToArray();
+
+        _ = Task.Run(async () =>
+        {
+            try
+            {
+                await Task.WhenAll(writerTasks);
+                channel.Writer.TryComplete();
+            }
+            catch
+            {
+                channel.Writer.TryComplete();
+            }
+        }, cancellationToken);
+
+        await foreach (var item in channel.Reader.ReadAllAsync(cancellationToken))
+        {
+            yield return item;
+        }
+    }
+}