Deduplicate MassTransit routing slips, activities and consumers

backend/Core/Musify.Infrastructure/MassTransit/Consumers/ProcessingFailedCleanup.cs

@@ -0,0 +1,34 @@
+using MassTransit;
+using Musify.Domain.ValueObjects;
+using Musify.Infrastructure.MassTransit.Arguments;
+using Musify.Infrastructure.MassTransit.RoutingSlip;
+
+namespace Musify.Infrastructure.MassTransit.Consumers;
+
+internal static class ProcessingFailedCleanup
+{
+    /// <summary>Removes whatever files were left behind and marks the entity as failed.</summary>
+    public static Task ExecuteAsync(
+        IBus bus,
+        Guid subjectId,
+        string markStepName,
+        string markEndpointName,
+        string? bucket,
+        params (string StepName, string? Key)[] files)
+    {
+        var builder = RoutingSlips.Create(correlationId: null);
+
+        if (!string.IsNullOrWhiteSpace(bucket))
+        {
+            foreach (var (stepName, key) in files)
+            {
+                if (!string.IsNullOrWhiteSpace(key))
+                    builder.AddRemoveFile(stepName, bucket, key);
+            }
+        }
+
+        builder.AddStep(markStepName, markEndpointName, new MarkLifeCycleArguments(subjectId, LifeCycleStatus.Failed));
+
+        return bus.Execute(builder.Build());
+    }
+}