fix(server): do not expose album members to shared link viewers (#32607)

(cherry picked from commit 380f3e74e622938b6b6c450859df8655be4e21ba)

server/src/dtos/album.dto.ts

@@ -6,6 +6,7 @@ import { AlbumUser, AuthSharedLink } from 'src/database.js';
 import { HistoryBuilder } from 'src/decorators.js';
 import { BulkIdErrorReasonSchema } from 'src/dtos/asset-ids.response.dto.js';
 import { MapAsset } from 'src/dtos/asset-response.dto.js';
+import { AuthDto } from 'src/dtos/auth.dto.js';
 import { UserResponseSchema, mapUser } from 'src/dtos/user.dto.js';
 import { AlbumUserRole, AlbumUserRoleSchema, AssetOrder, AssetOrderSchema } from 'src/enum.js';
 import { asDateTimeString } from 'src/utils/date.js';
@@ -229,7 +230,7 @@ export type MapAlbumDto = {
   order: AssetOrder;
 };
 
-export const mapAlbum = (entity: MaybeDehydrated<MapAlbumDto>): AlbumResponseDto => {
+export const mapAlbum = (entity: MaybeDehydrated<MapAlbumDto>, { auth }: { auth?: AuthDto } = {}): AlbumResponseDto => {
   const albumUsers: AlbumUserResponseDto[] = [];
 
   if (entity.albumUsers) {
@@ -262,7 +263,7 @@ export const mapAlbum = (entity: MaybeDehydrated<MapAlbumDto>): AlbumResponseDto
     createdAt: asDateTimeString(entity.createdAt),
     updatedAt: asDateTimeString(entity.updatedAt),
     id: entity.id,
-    albumUsers,
+    albumUsers: auth?.sharedLink ? [] : albumUsers,
     shared: hasSharedUser || hasSharedLink,
     hasSharedLink,
     startDate: asDateTimeString(startDate),

server/src/dtos/shared-link.dto.ts

@@ -114,7 +114,7 @@ export function mapSharedLink(sharedLink: SharedLink, { auth }: { auth: AuthDto
     createdAt: sharedLink.createdAt,
     expiresAt: sharedLink.expiresAt,
     assets: assets.map((asset) => mapAsset(asset, { auth })),
-    album: sharedLink.album ? mapAlbum(sharedLink.album) : undefined,
+    album: sharedLink.album ? mapAlbum(sharedLink.album, { auth }) : undefined,
     allowUpload: sharedLink.allowUpload,
     allowDownload: sharedLink.allowDownload,
     showMetadata: sharedLink.showExif,

server/src/services/album.service.spec.ts

@@ -713,10 +713,12 @@ describe(AlbumService.name, () => {
       ]);
 
       const auth = AuthFactory.from().sharedLink().build();
-      await sut.get(auth, album.id);
+      const result = await sut.get(auth, album.id);
 
       expect(mocks.album.getById).toHaveBeenCalledWith(album.id, auth.user.id);
       expect(mocks.access.album.checkSharedLinkAccess).toHaveBeenCalledWith(auth.sharedLink!.id, new Set([album.id]));
+      expect(result).toMatchObject({ albumUsers: [], shared: true, contributorCounts: undefined });
+      expect(mocks.album.getContributorCounts).not.toHaveBeenCalled();
     });
 
     it('should get a shared album via shared with user', async () => {

server/src/services/album.service.ts

@@ -83,8 +83,9 @@ export class AlbumService extends BaseService {
     const isShared = hasSharedUsers || hasSharedLink;
 
     return {
-      ...(await this.mapWithMetadata(album)),
-      contributorCounts: isShared ? await this.albumRepository.getContributorCounts(album.id) : undefined,
+      ...(await this.mapWithMetadata(album, auth)),
+      contributorCounts:
+        isShared && !auth.sharedLink ? await this.albumRepository.getContributorCounts(album.id) : undefined,
     };
   }
 
@@ -356,8 +357,8 @@ export class AlbumService extends BaseService {
     return findOrFail(() => this.albumRepository.getById(id, authUserId), 'Album');
   }
 
-  private async mapWithMetadata(album: MapAlbumDto): Promise<AlbumResponseDto> {
+  private async mapWithMetadata(album: MapAlbumDto, auth?: AuthDto): Promise<AlbumResponseDto> {
     const [metadata] = await this.albumRepository.getMetadataForIds([album.id]);
-    return { ...mapAlbum(album), ...mapAlbumMetadata(metadata) };
+    return { ...mapAlbum(album, { auth }), ...mapAlbumMetadata(metadata) };
   }
 }

server/src/services/shared-link.service.spec.ts

@@ -73,6 +73,20 @@ describe(SharedLinkService.name, () => {
       expect(mocks.sharedLink.get).toHaveBeenCalledWith(authDto.user.id, authDto.sharedLink?.id);
     });
 
+    it('should not return album users', async () => {
+      const authDto = authStub.adminSharedLink;
+      const sharedLink = SharedLinkFactory.from()
+        .album({}, (builder) => builder.albumUser())
+        .build();
+      mocks.sharedLink.get.mockResolvedValue(getForSharedLink(sharedLink));
+      mocks.album.getMetadataForIds.mockResolvedValue([]);
+
+      const response = await sut.getMine(authDto, []);
+
+      expect(sharedLink.album?.albumUsers.length).toBeGreaterThan(0);
+      expect(response.album).toMatchObject({ id: sharedLink.album!.id, albumUsers: [], shared: true });
+    });
+
     it('should throw an error for a request without a shared link auth token', async () => {
       const authDto = authStub.adminSharedLink;
       mocks.sharedLink.get.mockResolvedValue(sharedLinkStub.passwordRequired);