refactor

Femto.Common/Infrastructure/DDDPipelineBehaviour.cs

@@ -0,0 +1,35 @@
+using Femto.Common.Domain;
+using MediatR;
+using Microsoft.EntityFrameworkCore;
+using Microsoft.Extensions.Logging;
+
+namespace Femto.Common.Infrastructure;
+
+public class DDDPipelineBehaviour<TRequest, TResponse>(
+    DbContext context,
+    IPublisher publisher,
+    ILogger<DDDPipelineBehaviour<TRequest, TResponse>> logger
+) : IPipelineBehavior<TRequest, TResponse>
+    where TRequest : notnull
+{
+    public async Task<TResponse> Handle(
+        TRequest request,
+        RequestHandlerDelegate<TResponse> next,
+        CancellationToken cancellationToken
+    )
+    {
+        logger.LogDebug("handling request {Type}", typeof(TRequest).Name);
+        var response = await next(cancellationToken);
+        
+        var hasChanges = context.ChangeTracker.HasChanges();
+        logger.LogDebug("request handled. Changes? {HasChanges}", hasChanges);
+        
+        if (context.ChangeTracker.HasChanges())
+        {
+            await context.EmitDomainEvents(logger, publisher, cancellationToken);
+            logger.LogDebug("saving changes");
+            await context.SaveChangesAsync(cancellationToken);
+        }
+        return response;
+    }
+}