zyratlo commented on code in PR #5262:
URL: https://github.com/apache/texera/pull/5262#discussion_r3482795556


##########
frontend/src/app/workspace/service/notebook-migration/notebook-migration.service.ts:
##########
@@ -0,0 +1,212 @@
+/**
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+
+import { Injectable } from "@angular/core";
+import { AppSettings } from "../../../common/app-setting";
+import { Notebook, NotebookMigrationLLM } from "./migration-llm";
+import { HttpClient, HttpHeaders } from "@angular/common/http";
+import { NotificationService } from 
"src/app/common/service/notification/notification.service";
+import { GuiConfigService } from "../../../common/service/gui-config.service";
+import { WorkflowUtilService } from 
"../workflow-graph/util/workflow-util.service";
+import { catchError, firstValueFrom, map, Observable, of } from "rxjs";
+
+interface LiteLLMModel {
+  id: string;
+  object: string;
+  created: number;
+  owned_by: string;
+}
+
+interface LiteLLMModelsResponse {
+  data: LiteLLMModel[];
+  object: string;
+}
+
+interface MappingContent {
+  cell_to_operator: { [key: string]: any };
+  operator_to_cell: { [key: string]: any };
+}
+
+interface StoreNotebookResponse {
+  success: boolean;
+  message: string;
+}
+
+@Injectable({
+  providedIn: "root",
+})
+export class NotebookMigrationService {
+  private mapping: { [key: string]: MappingContent } = {};
+
+  constructor(
+    private http: HttpClient,
+    private notificationService: NotificationService,
+    private config: GuiConfigService,
+    private workflowUtilService: WorkflowUtilService
+  ) {}
+
+  private get enabled(): boolean {
+    return this.config.env.pythonNotebookMigrationEnabled;
+  }
+
+  public getAvailableModels(): Observable<{ name: string }[]> {
+    if (!this.enabled) return of([]);
+    return 
this.http.get<LiteLLMModelsResponse>(`${AppSettings.getApiEndpoint()}/models`).pipe(
+      map(response =>
+        response.data.map(model => ({
+          name: model.id,
+        }))
+      ),
+      catchError((err: unknown) => {
+        console.error("Failed to fetch models", err);
+        return of([]);
+      })
+    );
+  }
+
+  public async sendToAIGenerateWorkflow(notebookContent: Notebook, modelType: 
string) {
+    if (!this.enabled) throw new Error("Notebook migration feature is 
disabled");
+    const migrationLLM = new NotebookMigrationLLM(this.config, 
this.workflowUtilService);
+    // initialize() defaults to the user's Texera JWT via 
AuthService.getAccessToken().
+    migrationLLM.initialize(modelType);
+
+    const isValid = await migrationLLM.verifyConnection();
+    if (!isValid) {
+      throw new Error("Unable to authenticate with or reach the LLM backend");
+    }
+
+    try {
+      const result = await 
migrationLLM.convertNotebookToWorkflow(notebookContent);
+      const parsedResult = JSON.parse(result);
+      const workflowContent = parsedResult.workflowJSON;
+      const mappingContent = parsedResult.workflowNotebookMapping;
+      return { workflowContent, mappingContent };
+    } catch (error) {
+      console.error("Error converting notebook:", error);
+      throw error;
+    } finally {
+      migrationLLM.close();
+    }
+  }

Review Comment:
   The missing `apiKey` parameter is intentional. The `/api/chat/*` LiteLLM 
proxy is now `@RolesAllowed("REGULAR","ADMIN")` (#5421), so authentication uses 
the caller's Texera JWT, not a user-supplied key. `initialize()` defaults its 
access token to `AuthService.getAccessToken()`, so the service no longer 
threads a key through. The old `apiKey: "dummy"` path now returns 401 and was 
removed during reconciliation with the updated LLM client (#5260).
   
   The lifecycle point is valid and fixed: `verifyConnection()` now runs inside 
the outer try, so close() always runs in the finally, including on a 
verification failure. Refactored in 
[abe65b9](https://github.com/apache/texera/pull/5262/commits/abe65b99f9605d9cc8b5a135cc1d1eb6229ac79f)



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