ADK changes

src/app/core/services/interfaces/localfile.ts

@@ -0,0 +1,29 @@
+/**
+ * @license
+ * Copyright 2025 Google LLC
+ *
+ * Licensed 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 {InjectionToken} from '@angular/core';
+
+export const LOCAL_FILE_SERVICE = new InjectionToken<LocalFileService>(
+    'LocalFileService',
+);
+
+/**
+ * Service to provide methods to handle local files.
+ */
+export abstract class LocalFileService {
+  abstract createMessagePartFromFile(file: File): Promise<any>;
+}

src/app/core/services/local-file.service.spec.ts

@@ -0,0 +1,60 @@
+/**
+ * @license
+ * Copyright 2025 Google LLC
+ *
+ * Licensed 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 {TestBed} from '@angular/core/testing';
+
+import {LocalFileServiceImpl} from './local-file.service';
+
+describe('LocalFileServiceImpl', () => {
+  let service: LocalFileServiceImpl;
+
+  beforeEach(() => {
+    TestBed.configureTestingModule({
+      providers: [LocalFileServiceImpl],
+    });
+    service = TestBed.inject(LocalFileServiceImpl);
+  });
+
+  it('createMessagePartFromFile successfully reads a file and returns a message part',
+     async () => {
+       const fileContent = 'Hello World';
+       const fileContentBase64 = btoa(fileContent);  // Base64 for "Hello World"
+       const dataUrl = `data:text/plain;base64,${fileContentBase64}`;
+       const mockFile = new File([fileContent], 'test.txt', {
+         type: 'text/plain',
+       });
+       const mockFileReader = jasmine.createSpyObj('FileReader', [
+         'readAsDataURL',
+         'onload',
+       ]);
+       spyOn(window, 'FileReader').and.returnValue(mockFileReader);
+       mockFileReader.result = dataUrl;
+       mockFileReader.readAsDataURL.and.callFake(() => {
+         mockFileReader.onload({target: mockFileReader});
+       });
+
+       const result = await service.createMessagePartFromFile(mockFile);
+
+       expect(mockFileReader.readAsDataURL).toHaveBeenCalledWith(mockFile);
+       expect(result).toEqual({
+         inlineData: {
+           displayName: 'test.txt',
+           data: fileContentBase64,
+           mimeType: 'text/plain',
+         },
+       });
+     });
+});

src/app/core/services/local-file.service.ts

@@ -0,0 +1,50 @@
+/**
+ * @license
+ * Copyright 2025 Google LLC
+ *
+ * Licensed 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 {LocalFileService} from './interfaces/localfile';
+
+/**
+ * Service to provide methods to handle local files.
+ */
+@Injectable({
+  providedIn: 'root',
+})
+export class LocalFileServiceImpl extends LocalFileService {
+  async createMessagePartFromFile(file: File): Promise<any> {
+    return {
+      inlineData: {
+        displayName: file.name,
+        data: await this.readFileAsBytes(file),
+        mimeType: file.type,
+      },
+    };
+  }
+
+  private readFileAsBytes(file: File): Promise<ArrayBuffer> {
+    return new Promise((resolve, reject) => {
+      const reader = new FileReader();
+      reader.onload = (e: any) => {
+        const base64Data = e.target.result.split(',')[1];
+        resolve(base64Data);
+      };
+      reader.onerror = reject;
+      reader.readAsDataURL(file);  // Read as raw bytes
+    });
+  }
+}

src/main.ts

@@ -38,8 +38,10 @@ import {EVAL_SERVICE, EvalService} from './app/core/services/eval.service';
 import {EVENT_SERVICE, EventService} from './app/core/services/event.service';
 import {FEATURE_FLAG_SERVICE, FeatureFlagService} from './app/core/services/feature-flag.service';
 import {GRAPH_SERVICE, GraphService} from './app/core/services/graph.service';
+import {LOCAL_FILE_SERVICE} from './app/core/services/interfaces/localfile';
 import {SAFE_VALUES_SERVICE} from './app/core/services/interfaces/safevalues';
 import {STRING_TO_COLOR_SERVICE, StringToColorService} from './app/core/services/interfaces/string-to-color';
+import {LocalFileServiceImpl} from './app/core/services/local-file.service';
 import {SafeValuesServiceImpl} from './app/core/services/safevalues.service';
 import {SESSION_SERVICE, SessionService} from './app/core/services/session.service';
 import {STREAM_CHAT_SERVICE, StreamChatService} from './app/core/services/stream-chat.service';
@@ -78,6 +80,7 @@ fetch('./assets/config/runtime-config.json')
         {provide: GRAPH_SERVICE, useClass: GraphService},
         {provide: STRING_TO_COLOR_SERVICE, useClass: StringToColorServiceImpl},
         {provide: SAFE_VALUES_SERVICE, useClass: SafeValuesServiceImpl},
+        {provide: LOCAL_FILE_SERVICE, useClass: LocalFileServiceImpl},
         {provide: MARKDOWN_COMPONENT, useValue: MarkdownComponent},
         ...(config.logo ?
                 [{provide: LOGO_COMPONENT, useValue: CustomLogoComponent}] :