Write latest workflows used in App_Data/workflows

Author: mythz

AiServer.ServiceInterface/AppData.cs

@@ -47,13 +47,20 @@ public MediaProvider AssertComfyProvider(string name) => ComfyProviders.FirstOrD
         .Where(x => x.MediaType.Provider == AiServiceProvider.Comfy)
         .ToArray();
 
-    string? ReadTextFile(string path)
+    public string? ReadTextFile(string path)
     {
         var fullPath  = Path.Combine(env.ContentRootPath, path);
         return File.Exists(fullPath)
             ? File.ReadAllText(fullPath)
             : null;
     }
+
+    public void WriteTextFile(string path, string contents)
+    { 
+        var fullPath  = Path.Combine(env.ContentRootPath, path);
+        Path.GetDirectoryName(fullPath).AssertDir();
+        File.WriteAllText(fullPath, contents);
+    }
 
     T[] LoadModels<T>(string name) where T : IHasId<string>
     {

AiServer.ServiceInterface/Comfy/ComfyClient.cs

@@ -198,6 +198,12 @@ public async Task<ComfyWorkflowResponse> PromptGenerationAsync(ComfyWorkflowRequ
         }
 
         var workflowJson = await PopulateWorkflowAsync(workflowArgs, templatePath, token);
+
+        if (mediaModel != null)
+        {
+            AppData.Instance.WriteTextFile($"App_Data/workflows/{mediaModel.Id}.json", workflowJson);
+        }
+        
         // Convert to ComfyUI API JSON format
         var apiJson = await ConvertWorkflowToApiAsync(workflowJson, token);