MediaService: Add listUploadsByNote method

Signed-off-by: Philip Molares <philip.molares@udo.edu>

src/media/media.service.spec.ts

@@ -264,4 +264,40 @@ describe('MediaService', () => {
       });
     });
   });
+
+  describe('listUploadsByNote', () => {
+    describe('works', () => {
+      it('with one upload to note', async () => {
+        const mockMediaUploadEntry = {
+          id: 'testMediaUpload',
+          backendData: 'testBackendData',
+          note: {
+            id: '123',
+          } as Note,
+        } as MediaUpload;
+        jest
+          .spyOn(mediaRepo, 'find')
+          .mockResolvedValueOnce([mockMediaUploadEntry]);
+        const mediaList = await service.listUploadsByNote({
+          id: '123',
+        } as Note);
+        expect(mediaList).toEqual([mockMediaUploadEntry]);
+      });
+
+      it('without uploads to note', async () => {
+        jest.spyOn(mediaRepo, 'find').mockResolvedValueOnce([]);
+        const mediaList = await service.listUploadsByNote({
+          id: '123',
+        } as Note);
+        expect(mediaList).toEqual([]);
+      });
+      it('with error (undefined as return value of find)', async () => {
+        jest.spyOn(mediaRepo, 'find').mockResolvedValueOnce(undefined);
+        const mediaList = await service.listUploadsByNote({
+          id: '123',
+        } as Note);
+        expect(mediaList).toEqual([]);
+      });
+    });
+  });
 });

src/media/media.service.ts

@@ -24,6 +24,7 @@ import { AzureBackend } from './backends/azure-backend';
 import { ImgurBackend } from './backends/imgur-backend';
 import { User } from '../users/user.entity';
 import { MediaUploadDto } from './media-upload.dto';
+import { Note } from '../notes/note.entity';
 
 @Injectable()
 export class MediaService {
@@ -175,6 +176,23 @@ export class MediaService {
     return mediaUploads;
   }
 
+  /**
+   * @async
+   * List all uploads by a specific note
+   * @param {Note} note - the specific user
+   * @return {MediaUpload[]} arary of media uploads owned by the user
+   */
+  async listUploadsByNote(note: Note): Promise<MediaUpload[]> {
+    const mediaUploads = await this.mediaUploadRepository.find({
+      where: { note: note },
+      relations: ['user', 'note'],
+    });
+    if (mediaUploads === undefined) {
+      return [];
+    }
+    return mediaUploads;
+  }
+
   private chooseBackendType(): BackendType {
     switch (this.mediaConfig.backend.use) {
       case 'filesystem':