Split out worker related things to a separate service definition.

Sources/StableDiffusionNode/ImageGenerationService.swift

@@ -0,0 +1,40 @@
+import Foundation
+import GRPC
+import StableDiffusionCore
+import StableDiffusionProtos
+
+class ImageGenerationServiceProvider: SdImageGenerationServiceAsyncProvider {
+    private let jobManager: JobManager
+    private let modelManager: ModelManager
+
+    init(jobManager: JobManager, modelManager: ModelManager) {
+        self.jobManager = jobManager
+        self.modelManager = modelManager
+    }
+
+    func generateImages(request: SdGenerateImagesRequest, context _: GRPCAsyncServerCallContext) async throws -> SdGenerateImagesResponse {
+        guard let state = await modelManager.getModelState(name: request.modelName) else {
+            throw SdCoreError.modelNotFound
+        }
+        let job = await jobManager.create()
+        DispatchQueue.main.async {
+            Task {
+                await self.jobManager.updateJobQueued(job)
+            }
+        }
+        return try await state.generate(request, job: job)
+    }
+
+    func generateImagesStreaming(request: SdGenerateImagesRequest, responseStream: GRPCAsyncResponseStreamWriter<SdGenerateImagesStreamUpdate>, context _: GRPCAsyncServerCallContext) async throws {
+        guard let state = await modelManager.getModelState(name: request.modelName) else {
+            throw SdCoreError.modelNotFound
+        }
+        let job = await jobManager.create()
+        DispatchQueue.main.async {
+            Task {
+                await self.jobManager.updateJobQueued(job)
+            }
+        }
+        _ = try await state.generate(request, job: job, stream: responseStream)
+    }
+}