AppTests

Govor.ConsoleClient/Services/Implementations/MiddlewarePipeline.cs

@@ -0,0 +1,30 @@
+using Govor.ConsoleClient.Services.Interfaces;
+using Govor.ConsoleClient.Services.Middleware;
+
+namespace Govor.ConsoleClient.Services.Implementations;
+
+public delegate Task CommandMiddleware(CommandContext context, Func<Task> next);
+
+public class MiddlewarePipeline : IMiddlewarePipeline
+{
+    private readonly IList<ICommandMiddleware> _middlewares;
+
+    public MiddlewarePipeline(IEnumerable<ICommandMiddleware> middlewares)
+    {
+        _middlewares = middlewares.ToList();
+    }
+
+    public Task ExecuteAsync(CommandContext context)
+    {
+        return InvokeNext(0, context);
+    }
+
+    private Task InvokeNext(int index, CommandContext context)
+    {
+        if (index < _middlewares.Count)
+        {
+            return _middlewares[index].InvokeAsync(context, () => InvokeNext(index + 1, context));
+        }
+        return context.Command.ExecuteAsync(context);
+    }
+}