[FA-4] Adds an event bus infrastructure, a RabbitMQ implementation and rewires existing mutations on NovelService to utilize it.

FictionArchive.Service.TranslationService/Services/EventHandlers/TranslationRequestCreatedEventHandler.cs

@@ -0,0 +1,31 @@
+using FictionArchive.Service.Shared.Services.EventBus;
+using FictionArchive.Service.TranslationService.Models.Enums;
+using FictionArchive.Service.TranslationService.Models.IntegrationEvents;
+
+namespace FictionArchive.Service.TranslationService.Services.EventHandlers;
+
+public class TranslationRequestCreatedEventHandler : IIntegrationEventHandler<TranslationRequestCreatedEvent>
+{
+    private readonly ILogger<TranslationRequestCreatedEventHandler> _logger;
+    private readonly TranslationEngineService _translationEngineService;
+    private readonly IEventBus _eventBus;
+
+    public TranslationRequestCreatedEventHandler(ILogger<TranslationRequestCreatedEventHandler> logger, TranslationEngineService translationEngineService)
+    {
+        _logger = logger;
+        _translationEngineService = translationEngineService;
+    }
+
+    public async Task Handle(TranslationRequestCreatedEvent @event)
+    {
+        var result = await _translationEngineService.Translate(@event.From, @event.To, @event.Body, @event.TranslationEngineKey);
+        if (result.Status == TranslationRequestStatus.Success)
+        {
+            await _eventBus.Publish(new TranslationRequestCompletedEvent()
+            {
+                TranslatedText = result.TranslatedText,
+                TranslationRequestId = @event.TranslationRequestId,
+            });
+        }
+    }
+}