TF-825 Download email as EML file (#2854)

lib/features/email/domain/exceptions/email_exceptions.dart

@@ -4,4 +4,6 @@ class NotFoundEmailContentException implements Exception {}
 
 class EmptyEmailContentException implements Exception {}
 
-class NotFoundEmailRecoveryActionException implements Exception {}
+class NotFoundEmailRecoveryActionException implements Exception {}
+
+class NotFoundEmailBlobIdException implements Exception {}

lib/features/email/domain/state/download_attachment_for_web_state.dart

@@ -1,7 +1,6 @@
 import 'dart:typed_data';
 import 'package:core/presentation/state/failure.dart';
 import 'package:core/presentation/state/success.dart';
-import 'package:jmap_dart_client/jmap/core/id.dart';
 import 'package:model/download/download_task_id.dart';
 import 'package:model/email/attachment.dart';
 
@@ -59,14 +58,14 @@ class DownloadAttachmentForWebSuccess extends UIState {
 class DownloadAttachmentForWebFailure extends FeatureFailure {
 
   final DownloadTaskId? taskId;
-  final Id? attachmentBlobId;
+  final Attachment? attachment;
 
   DownloadAttachmentForWebFailure({
-    required this.attachmentBlobId,
+    this.attachment,
     this.taskId,
     dynamic exception
   }) : super(exception: exception);
 
   @override
-  List<Object?> get props => [taskId, ...super.props];
+  List<Object?> get props => [attachment, taskId, ...super.props];
 }

lib/features/email/domain/state/view_attachment_for_web_state.dart

@@ -22,7 +22,7 @@ class ViewAttachmentForWebSuccess extends DownloadAttachmentForWebSuccess {
 
 class ViewAttachmentForWebFailure extends DownloadAttachmentForWebFailure {
   ViewAttachmentForWebFailure({
-    required super.attachmentBlobId,
+    required super.attachment,
     super.taskId,
     super.exception,
   });

lib/features/email/domain/usecases/download_attachment_for_web_interactor.dart

@@ -72,7 +72,7 @@ class DownloadAttachmentForWebInteractor {
     } catch (exception) {
       yield Left<Failure, Success>(
         DownloadAttachmentForWebFailure(
-          attachmentBlobId: attachment.blobId,
+          attachment: attachment,
           taskId: taskId,
           exception: exception
         )

lib/features/email/domain/usecases/view_attachment_for_web_interactor.dart

@@ -34,7 +34,7 @@ class ViewAttachmentForWebInteractor {
               (failure) {
                 if (failure is DownloadAttachmentForWebFailure) {
                   return Left(ViewAttachmentForWebFailure(
-                    attachmentBlobId: attachment.blobId,
+                    attachment: attachment,
                     taskId: failure.taskId,
                     exception: failure.exception,
                   ));