hopefully not a horribly foolish refactoring

Femto.Common/Infrastructure/Outbox/Outbox.cs

@@ -0,0 +1,29 @@
+using System.Reflection;
+using System.Text.Json;
+using Femto.Common.Attributes;
+using Femto.Common.Integration;
+using Microsoft.Extensions.DependencyInjection;
+
+namespace Femto.Common.Infrastructure.Outbox;
+
+public class Outbox<TContext>(TContext context, IOutboxMessageMapping mapping) where TContext : IOutboxContext
+{
+    public async Task AddMessage<TMessage>(
+        Guid aggregateId,
+        TMessage message,
+        CancellationToken cancellationToken
+    )
+        where TMessage : IIntegrationEvent
+    {
+        var eventName = mapping.GetEventName(typeof(TMessage));
+        if (eventName is null)
+            throw new InvalidOperationException(
+                $"{typeof(TMessage).Name} does not have EventType attribute"
+            );
+
+        await context.Outbox.AddAsync(
+            new(message.EventId, aggregateId, eventName, JsonSerializer.Serialize(message)),
+            cancellationToken
+        );
+    }
+}