TF-3416 Handle download attachment in EML previewer on web

core/lib/utils/app_logger.dart

@@ -7,7 +7,7 @@ import 'package:flutter/material.dart';
 final logHistory = _Dispatcher('');
 
 void log(String? value, {Level level = Level.info}) {
-  // if (!kDebugMode) return;
+  if (!kDebugMode) return;
 
   String logsStr = value ?? '';
   logHistory.value = '$logsStr\n${logHistory.value}';

lib/features/base/reloadable/reloadable_controller.dart

@@ -23,8 +23,8 @@ import 'package:tmail_ui_user/main/error/capability_validator.dart';
 import 'package:tmail_ui_user/main/exceptions/remote_exception.dart';
 
 abstract class ReloadableController extends BaseController {
-  final GetSessionInteractor _getSessionInteractor = Get.find<GetSessionInteractor>();
+  final GetSessionInteractor getSessionInteractor = Get.find<GetSessionInteractor>();
-  final GetAuthenticatedAccountInteractor _getAuthenticatedAccountInteractor = Get.find<GetAuthenticatedAccountInteractor>();
+  final GetAuthenticatedAccountInteractor getAuthenticatedAccountInteractor = Get.find<GetAuthenticatedAccountInteractor>();
   final UpdateAccountCacheInteractor _updateAccountCacheInteractor = Get.find<UpdateAccountCacheInteractor>();
 
   @override
@@ -78,11 +78,11 @@ abstract class ReloadableController extends BaseController {
   }
 
   void getAuthenticatedAccountAction() {
-    consumeState(_getAuthenticatedAccountInteractor.execute());
+    consumeState(getAuthenticatedAccountInteractor.execute());
   }
 
   void _handleGetCredentialSuccess(GetCredentialViewState success) {
-    _setDataToInterceptors(
+    setDataToInterceptors(
       baseUrl: success.baseUrl.toString(),
       userName: success.userName,
       password: success.password);
@@ -90,7 +90,7 @@ abstract class ReloadableController extends BaseController {
   }
 
   void _handleGetStoredTokenOidcSuccess(GetStoredTokenOidcSuccess success) {
-    _setDataToInterceptors(
+    setDataToInterceptors(
       baseUrl: success.baseUrl.toString(),
       tokenOIDC: success.tokenOidc,
       oidcConfiguration: success.oidcConfiguration);
@@ -102,7 +102,7 @@ abstract class ReloadableController extends BaseController {
     handleReloaded(session);
   }
 
-  void _setDataToInterceptors({
+  void setDataToInterceptors({
     required String baseUrl,
     UserName? userName,
     Password? password,
@@ -124,7 +124,7 @@ abstract class ReloadableController extends BaseController {
   }
 
   void getSessionAction() {
-    consumeState(_getSessionInteractor.execute());
+    consumeState(getSessionInteractor.execute());
   }
 
   void handleGetSessionFailure(GetSessionFailure failure) {

lib/features/email/presentation/extensions/attachment_extension.dart

@@ -2,6 +2,7 @@ import 'package:core/data/constants/constant.dart';
 import 'package:core/presentation/extensions/media_type_extension.dart';
 import 'package:core/presentation/resources/image_paths.dart';
 import 'package:core/utils/platform_info.dart';
+import 'package:model/download/download_task_id.dart';
 import 'package:model/email/attachment.dart';
 import 'package:tmail_ui_user/main/routes/app_routes.dart';
 import 'package:tmail_ui_user/main/routes/route_utils.dart';
@@ -35,4 +36,6 @@ extension AttachmentExtension on Attachment {
 
     return '${Constant.attachmentScheme}:${blobId!.value}?name=${name ?? ''}&size=${size?.value ?? ''}&type=${type?.mimeType ?? ''}';
   }
+
+  DownloadTaskId get downloadTaskId => DownloadTaskId(blobId!.value);
 }

lib/features/email_previewer/download_attachment_loading_bar.dart

@@ -0,0 +1,32 @@
+
+import 'package:core/presentation/extensions/color_extension.dart';
+import 'package:flutter/material.dart';
+import 'package:percent_indicator/linear_percent_indicator.dart';
+import 'package:tmail_ui_user/features/email/domain/state/download_attachment_for_web_state.dart';
+
+class DownloadAttachmentLoadingBar extends StatelessWidget {
+
+  final dynamic viewState;
+
+  const DownloadAttachmentLoadingBar({super.key, this.viewState});
+
+  @override
+  Widget build(BuildContext context) {
+    if (viewState is StartDownloadAttachmentForWeb) {
+      return const LinearProgressIndicator(
+        color: AppColor.primaryColor,
+        minHeight: 5,
+        backgroundColor: AppColor.colorProgressLoadingBackground);
+    } if (viewState is DownloadingAttachmentForWeb) {
+      return LinearPercentIndicator(
+        padding: EdgeInsets.zero,
+        lineHeight: 5,
+        percent: viewState.progress / 100,
+        barRadius: const Radius.circular(1),
+        backgroundColor: AppColor.colorProgressLoadingBackground,
+        progressColor: AppColor.primaryColor);
+    } else {
+      return const SizedBox.shrink();
+    }
+  }
+}

lib/features/email_previewer/email_previewer_bindings.dart

@@ -1,5 +1,6 @@
 
 import 'package:core/data/model/source_type/data_source_type.dart';
+import 'package:core/data/network/download/download_manager.dart';
 import 'package:core/presentation/resources/image_paths.dart';
 import 'package:core/utils/file_utils.dart';
 import 'package:core/utils/print_utils.dart';
@@ -20,6 +21,7 @@ import 'package:tmail_ui_user/features/email/data/local/html_analyzer.dart';
 import 'package:tmail_ui_user/features/email/data/network/email_api.dart';
 import 'package:tmail_ui_user/features/email/data/repository/email_repository_impl.dart';
 import 'package:tmail_ui_user/features/email/domain/repository/email_repository.dart';
+import 'package:tmail_ui_user/features/email/domain/usecases/download_attachment_for_web_interactor.dart';
 import 'package:tmail_ui_user/features/email/domain/usecases/get_preview_email_eml_content_shared_interactor.dart';
 import 'package:tmail_ui_user/features/email/domain/usecases/get_preview_eml_content_in_memory_interactor.dart';
 import 'package:tmail_ui_user/features/email/domain/usecases/move_preview_eml_content_from_persistent_to_memory_interactor.dart';
@@ -27,6 +29,9 @@ import 'package:tmail_ui_user/features/email/domain/usecases/parse_email_by_blob
 import 'package:tmail_ui_user/features/email/domain/usecases/preview_email_from_eml_file_interactor.dart';
 import 'package:tmail_ui_user/features/email/domain/usecases/remove_preview_email_eml_content_shared_interactor.dart';
 import 'package:tmail_ui_user/features/email_previewer/email_previewer_controller.dart';
+import 'package:tmail_ui_user/features/login/domain/repository/account_repository.dart';
+import 'package:tmail_ui_user/features/login/domain/repository/authentication_oidc_repository.dart';
+import 'package:tmail_ui_user/features/login/domain/repository/credential_repository.dart';
 import 'package:tmail_ui_user/features/mailbox/data/datasource/state_datasource.dart';
 import 'package:tmail_ui_user/features/mailbox/data/datasource_impl/state_datasource_impl.dart';
 import 'package:tmail_ui_user/features/mailbox/data/local/state_cache_manager.dart';
@@ -50,7 +55,9 @@ class EmailPreviewerBindings extends BaseBindings {
         Get.find<RemovePreviewEmailEmlContentSharedInteractor>(),
         Get.find<GetPreviewEmlContentInMemoryInteractor>(),
         Get.find<ParseEmailByBlobIdInteractor>(),
-        Get.find<PreviewEmailFromEmlFileInteractor>()));
+        Get.find<PreviewEmailFromEmlFileInteractor>(),
+        Get.find<DownloadAttachmentForWebInteractor>(),
+        Get.find<DownloadManager>()));
   }
 
   @override
@@ -110,6 +117,11 @@ class EmailPreviewerBindings extends BaseBindings {
         Get.find<EmailRepository>()));
     Get.lazyPut(() => PreviewEmailFromEmlFileInteractor(
         Get.find<EmailRepository>()));
+    Get.lazyPut(() => DownloadAttachmentForWebInteractor(
+        Get.find<EmailRepository>(),
+        Get.find<CredentialRepository>(),
+        Get.find<AccountRepository>(),
+        Get.find<AuthenticationOIDCRepository>()));
   }
 
   @override

lib/features/email_previewer/email_previewer_controller.dart

@@ -1,29 +1,40 @@
 
+import 'dart:async';
+
+import 'package:core/data/constants/constant.dart';
+import 'package:core/data/network/download/download_manager.dart';
 import 'package:core/presentation/state/failure.dart';
 import 'package:core/presentation/state/success.dart';
+import 'package:core/utils/app_logger.dart';
 import 'package:core/utils/html/html_utils.dart';
 import 'package:dartz/dartz.dart';
+import 'package:dio/dio.dart';
 import 'package:flutter/material.dart';
 import 'package:get/get.dart';
 import 'package:jmap_dart_client/jmap/account_id.dart';
 import 'package:jmap_dart_client/jmap/core/id.dart';
 import 'package:jmap_dart_client/jmap/core/session/session.dart';
-import 'package:model/model.dart';
+import 'package:model/email/attachment.dart';
+import 'package:model/extensions/session_extension.dart';
 import 'package:tmail_ui_user/features/base/reloadable/reloadable_controller.dart';
 import 'package:tmail_ui_user/features/caching/exceptions/local_storage_exception.dart';
 import 'package:tmail_ui_user/features/email/domain/exceptions/email_exceptions.dart';
 import 'package:tmail_ui_user/features/email/domain/model/preview_email_eml_request.dart';
+import 'package:tmail_ui_user/features/email/domain/state/download_attachment_for_web_state.dart';
 import 'package:tmail_ui_user/features/email/domain/state/get_preview_email_eml_content_shared_state.dart';
 import 'package:tmail_ui_user/features/email/domain/state/get_preview_eml_content_in_memory_state.dart';
 import 'package:tmail_ui_user/features/email/domain/state/parse_email_by_blob_id_state.dart';
 import 'package:tmail_ui_user/features/email/domain/state/preview_email_from_eml_file_state.dart';
+import 'package:tmail_ui_user/features/email/domain/usecases/download_attachment_for_web_interactor.dart';
 import 'package:tmail_ui_user/features/email/domain/usecases/get_preview_email_eml_content_shared_interactor.dart';
 import 'package:tmail_ui_user/features/email/domain/usecases/get_preview_eml_content_in_memory_interactor.dart';
 import 'package:tmail_ui_user/features/email/domain/usecases/move_preview_eml_content_from_persistent_to_memory_interactor.dart';
 import 'package:tmail_ui_user/features/email/domain/usecases/parse_email_by_blob_id_interactor.dart';
 import 'package:tmail_ui_user/features/email/domain/usecases/preview_email_from_eml_file_interactor.dart';
 import 'package:tmail_ui_user/features/email/domain/usecases/remove_preview_email_eml_content_shared_interactor.dart';
+import 'package:tmail_ui_user/features/email/presentation/extensions/attachment_extension.dart';
 import 'package:tmail_ui_user/features/email/presentation/model/eml_previewer.dart';
+import 'package:tmail_ui_user/features/email/presentation/utils/email_utils.dart';
 import 'package:tmail_ui_user/features/home/data/exceptions/session_exceptions.dart';
 import 'package:tmail_ui_user/features/home/domain/state/get_session_state.dart';
 import 'package:tmail_ui_user/features/login/domain/state/get_authenticated_account_state.dart';
@@ -41,12 +52,20 @@ class EmailPreviewerController extends ReloadableController {
   final GetPreviewEmlContentInMemoryInteractor _getPreviewEmlContentInMemoryInteractor;
   final ParseEmailByBlobIdInteractor _parseEmailByBlobIdInteractor;
   final PreviewEmailFromEmlFileInteractor _previewEmailFromEmlFileInteractor;
+  final DownloadAttachmentForWebInteractor _downloadAttachmentForWebInteractor;
+  final DownloadManager _downloadManager;
 
   final emlContentViewState = Rx<Either<Failure, Success>>(Right(UIState.idle));
+  final downloadAttachmentState = Rx<dynamic>(null);
 
   Session? _session;
   AccountId? _accountId;
   String? _keyStored;
+  bool _isDownloadingAttachment = false;
+  CancelToken? _downloadAttachmentCancelToken;
+  StreamController<Either<Failure, Success>>? _downloadAttachmentStreamController;
+  StreamSubscription<Either<Failure, Success>>? _downloadAttachmentStreamSubscription;
+  StreamSubscription<Either<Failure, Success>>? _downloadInteractorStreamSubscription;
 
   EmailPreviewerController(
     this._getPreviewEmailEMLContentSharedInteractor,
@@ -55,11 +74,14 @@ class EmailPreviewerController extends ReloadableController {
     this._getPreviewEmlContentInMemoryInteractor,
     this._parseEmailByBlobIdInteractor,
     this._previewEmailFromEmlFileInteractor,
+    this._downloadAttachmentForWebInteractor,
+    this._downloadManager,
   );
 
   @override
   void onInit() {
     consumeState(Stream.value(Right(GettingPreviewEmailEMLContentShared())));
+    _initialDownloadAttachmentStreamListener();
     super.onInit();
   }
 
@@ -74,6 +96,15 @@ class EmailPreviewerController extends ReloadableController {
     _accountId = null;
     _session = null;
     _keyStored = null;
+    _isDownloadingAttachment = false;
+    _downloadAttachmentCancelToken?.cancel();
+    _downloadAttachmentCancelToken = null;
+    _downloadAttachmentStreamSubscription?.cancel();
+    _downloadAttachmentStreamController?.close();
+    _downloadAttachmentStreamSubscription = null;
+    _downloadAttachmentStreamController = null;
+    _downloadInteractorStreamSubscription?.cancel();
+    _downloadInteractorStreamSubscription = null;
     super.onClose();
   }
 
@@ -175,10 +206,23 @@ class EmailPreviewerController extends ReloadableController {
   }
 
   Future<void> onClickHyperLink(Uri? uri) async {
+    log('EmailPreviewerController::onClickHyperLink:Uri = $uri');
     if (uri == null) return;
 
+    if (uri.scheme == Constant.attachmentScheme) {
+      final attachment = EmailUtils.parsingAttachmentByUri(uri);
+      if (attachment == null) return;
+
+      _downloadAttachment(attachment);
+    } else {
+      _openNewWindowByHyperLink(uri);
+    }
+  }
+
+  void _openNewWindowByHyperLink(Uri uri) {
     bool isEMlPreview = uri.toString().startsWith(RouteUtils.emailEMLPreviewerRoutePath);
-    final url = _standardizeURL(uri.toString());
+    final url = _standardizeURL(uri);
+    log('EmailPreviewerController::_openNewWindowByHyperLink: url = $url');
 
     bool isOpen = HtmlUtils.openNewWindowByUrl(
       url,
@@ -188,17 +232,16 @@ class EmailPreviewerController extends ReloadableController {
 
     if (!isOpen && currentOverlayContext != null && currentContext != null) {
       appToast.showToastErrorMessage(
-        currentOverlayContext!,
+          currentOverlayContext!,
-        AppLocalizations.of(currentContext!).cannotOpenNewWindow);
+          AppLocalizations.of(currentContext!).cannotOpenNewWindow);
     }
   }
 
-  String _standardizeURL(String url) {
+  String _standardizeURL(Uri uri) {
-    if (url.startsWith('${RouteUtils.mailtoPrefix}:')) {
+    if (uri.scheme == RouteUtils.mailtoPrefix) {
-      final mailtoLink = '${RouteUtils.baseOriginUrl}/mailto?uri=$url';
+      return '${RouteUtils.baseOriginUrl}/mailto?uri=${uri.toString()}';
-      return mailtoLink;
     }
-    return url;
+    return uri.toString();
   }
 
   void _parseEmailByBlobId(AccountId accountId, String blobId) {
@@ -241,4 +284,118 @@ class EmailPreviewerController extends ReloadableController {
   void _updateWindowBrowserTitle(String title) {
     HtmlUtils.setWindowBrowserTitle(title);
   }
+
+  void _downloadAttachment(Attachment attachment) {
+    if (_isDownloadingAttachment) {
+      if (currentContext == null || currentOverlayContext == null) return;
+
+      appToast.showToastWarningMessage(
+        currentOverlayContext!,
+        AppLocalizations.of(currentContext!).downloadAttachmentInEMLPreviewWarningMessage);
+      return;
+    }
+
+    _isDownloadingAttachment = true;
+    downloadAttachmentState.value = Right(StartDownloadAttachmentForWeb(
+      attachment.downloadTaskId,
+      attachment));
+
+    if (_accountId != null && _session != null) {
+      _startDownloadAttachment(attachment);
+    } else {
+      _getAuthenticatedAccountAction(attachment);
+    }
+  }
+
+  void _startDownloadAttachment(Attachment attachment) {
+    _downloadInteractorStreamSubscription = _downloadAttachmentForWebInteractor
+        .execute(
+            attachment.downloadTaskId,
+            attachment,
+            _accountId!,
+            _session!.getDownloadUrl(jmapUrl: dynamicUrlInterceptors.jmapUrl),
+            _downloadAttachmentStreamController!)
+        .listen(_handleDownloadAttachmentViewState);
+  }
+
+  void _initialDownloadAttachmentStreamListener() {
+    _downloadAttachmentCancelToken = CancelToken();
+    _downloadAttachmentStreamController = StreamController<Either<Failure, Success>>();
+    _downloadAttachmentStreamSubscription = _downloadAttachmentStreamController
+        ?.stream
+        .listen(_handleDownloadAttachmentViewState);
+  }
+
+  void _handleDownloadAttachmentViewState(Either<Failure, Success> viewState) {
+    viewState.fold(
+      (failure) {
+        downloadAttachmentState.value = failure;
+        if (failure is DownloadAttachmentForWebFailure) {
+          _isDownloadingAttachment = false;
+        }
+      },
+      (success) {
+        downloadAttachmentState.value = success;
+        if (success is DownloadAttachmentForWebSuccess) {
+          _isDownloadingAttachment = false;
+          _handleDownloadAttachmentSuccess(success);
+        }
+      }
+    );
+  }
+
+  Future<void> _getAuthenticatedAccountAction(Attachment attachment) async {
+    final authenticatedAccountViewState = await getAuthenticatedAccountInteractor
+      .execute()
+      .last;
+
+    final authenticatedSuccessState = authenticatedAccountViewState
+        .getOrElse(() => UIState.idle);
+
+    if (authenticatedSuccessState is! GetStoredTokenOidcSuccess &&
+        authenticatedSuccessState is! GetCredentialViewState) {
+      _isDownloadingAttachment = false;
+
+      if (currentContext == null || currentOverlayContext == null) return;
+
+      appToast.showToastErrorMessage(
+          currentOverlayContext!,
+          AppLocalizations.of(currentContext!).attachment_download_failed);
+      return;
+    }
+
+    if (authenticatedSuccessState is GetStoredTokenOidcSuccess) {
+      setDataToInterceptors(
+        baseUrl: authenticatedSuccessState.baseUrl.toString(),
+        tokenOIDC: authenticatedSuccessState.tokenOidc,
+        oidcConfiguration: authenticatedSuccessState.oidcConfiguration);
+    } else if (authenticatedSuccessState is GetCredentialViewState) {
+      setDataToInterceptors(
+        baseUrl: authenticatedSuccessState.baseUrl.toString(),
+        userName: authenticatedSuccessState.userName,
+        password: authenticatedSuccessState.password);
+    }
+
+    final sessionViewState = await getSessionInteractor.execute().last;
+    final sessionSuccessState = sessionViewState.getOrElse(() => UIState.idle);
+
+    if (sessionSuccessState is GetSessionSuccess) {
+      _session = sessionSuccessState.session;
+      _accountId = _session?.accountId;
+
+      _startDownloadAttachment(attachment);
+    } else {
+      _isDownloadingAttachment = false;
+
+      appToast.showToastErrorMessage(
+          currentOverlayContext!,
+          AppLocalizations.of(currentContext!).attachment_download_failed);
+    }
+  }
+
+  void _handleDownloadAttachmentSuccess(DownloadAttachmentForWebSuccess success) {
+    _downloadManager.createAnchorElementDownloadFileWeb(
+        success.bytes,
+        success.attachment.generateFileName());
+  }
 }

lib/features/email_previewer/email_previewer_view.dart

@@ -7,6 +7,7 @@ import 'package:tmail_ui_user/features/email/domain/state/get_preview_email_eml_
 import 'package:tmail_ui_user/features/email/domain/state/get_preview_eml_content_in_memory_state.dart';
 import 'package:tmail_ui_user/features/email/domain/state/preview_email_from_eml_file_state.dart';
 import 'package:tmail_ui_user/features/email/presentation/model/eml_previewer.dart';
+import 'package:tmail_ui_user/features/email_previewer/download_attachment_loading_bar.dart';
 import 'package:tmail_ui_user/features/email_previewer/email_previewer_controller.dart';
 import 'package:tmail_ui_user/main/localizations/app_localizations.dart';
 import 'package:tmail_ui_user/main/utils/app_utils.dart';
@@ -19,26 +20,36 @@ class EmailPreviewerView extends GetWidget<EmailPreviewerController> {
   Widget build(BuildContext context) {
     return Scaffold(
       backgroundColor: Colors.white,
-      body: Obx(() {
+      body: Stack(
-        final viewState = controller.emlContentViewState.value;
+        children: [
-        return viewState.fold(
+          Obx(() {
-          (failure) => Center(
+            final viewState = controller.emlContentViewState.value;
-            child: Text(AppLocalizations.of(context).previewEmailFromEMLFileFailed),
+            return viewState.fold(
-          ),
+              (failure) => Center(
-          (success) {
+                child: Text(AppLocalizations.of(context).previewEmailFromEMLFileFailed),
-            if (success is GetPreviewEmailEMLContentSharedSuccess) {
+              ),
-              return _buildEMLPreviewerWidget(context, success.emlPreviewer);
+              (success) {
-            } else if (success is GetPreviewEMLContentInMemorySuccess) {
+                if (success is GetPreviewEmailEMLContentSharedSuccess) {
-              return _buildEMLPreviewerWidget(context, success.emlPreviewer);
+                  return _buildEMLPreviewerWidget(context, success.emlPreviewer);
-            } else if (success is PreviewEmailFromEmlFileSuccess) {
+                } else if (success is GetPreviewEMLContentInMemorySuccess) {
-              return _buildEMLPreviewerWidget(context, success.emlPreviewer);
+                  return _buildEMLPreviewerWidget(context, success.emlPreviewer);
-            } else {
+                } else if (success is PreviewEmailFromEmlFileSuccess) {
-              return const Center(
+                  return _buildEMLPreviewerWidget(context, success.emlPreviewer);
-                child: CupertinoLoadingWidget(),
+                } else {
-              );
+                  return const Center(
-            }
+                    child: CupertinoLoadingWidget(),
-        });
+                  );
-      }),
+                }
+            });
+          }),
+          Align(
+            alignment: AlignmentDirectional.topCenter,
+            child: Obx(() => DownloadAttachmentLoadingBar(
+              viewState: controller.downloadAttachmentState.value,
+            )),
+          )
+        ],
+      ),
     );
   }
 

lib/features/identity_creator/presentation/identity_creator_controller.dart

@@ -886,6 +886,9 @@ class IdentityCreatorController extends BaseController with DragDropFileMixin im
     clearFocusEditor(context);
 
     final listFileInfo = await onDragDone(context: context, details: details);
+
+    if (!context.mounted) return;
+
     await _uploadMultipleFilesToPublicAsset(
       context,
       listFileInfo,

lib/features/push_notification/data/repository/fcm_repository_impl.dart

@@ -80,7 +80,7 @@ class FCMRepositoryImpl extends FCMRepository {
     if (listEmails.isNotEmpty) {
       return EmailsResponse(emailList: listEmails);
     } else {
-      return EmailsResponse();
+      return const EmailsResponse();
     }
   }
 

lib/l10n/intl_messages.arb

@@ -1,5 +1,5 @@
 {
-  "@@last_modified": "2025-01-13T15:53:39.843822",
+  "@@last_modified": "2025-01-14T12:52:43.828907",
   "initializing_data": "Initializing data...",
   "@initializing_data": {
     "type": "text",
@@ -4107,5 +4107,11 @@
     "type": "text",
     "placeholders_order": [],
     "placeholders": {}
+  },
+  "downloadAttachmentInEMLPreviewWarningMessage": "Downloading attachment. You can only download one file at a time.",
+  "@downloadAttachmentInEMLPreviewWarningMessage": {
+    "type": "text",
+    "placeholders_order": [],
+    "placeholders": {}
   }
 }

lib/main/localizations/app_localizations.dart

@@ -4314,4 +4314,11 @@ class AppLocalizations {
       name: 'cannotOpenNewWindow',
     );
   }
+
+  String get downloadAttachmentInEMLPreviewWarningMessage {
+    return Intl.message(
+      'Downloading attachment. You can only download one file at a time.',
+      name: 'downloadAttachmentInEMLPreviewWarningMessage',
+    );
+  }
 }