TF-629 Download file and get the contentType to open file in Android/iOS

lib/features/email/domain/repository/email_repository.dart

@@ -1,3 +1,4 @@
+import 'package:core/core.dart';
 import 'package:dio/dio.dart';
 import 'package:jmap_dart_client/jmap/account_id.dart';
 import 'package:jmap_dart_client/jmap/mail/email/email.dart';
@@ -19,7 +20,7 @@ abstract class EmailRepository {
     AccountRequest accountRequest
   );
 
-  Future<String> exportAttachment(
+  Future<DownloadedResponse> exportAttachment(
     Attachment attachment,
     AccountId accountId,
     String baseDownloadUrl,

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

@@ -1,16 +1,16 @@
 import 'package:core/core.dart';
 
 class ExportAttachmentSuccess extends UIState {
-  final String filePath;
+  final DownloadedResponse downloadedResponse;
 
-  ExportAttachmentSuccess(this.filePath);
+  ExportAttachmentSuccess(this.downloadedResponse);
 
   @override
-  List<Object> get props => [filePath];
+  List<Object> get props => [downloadedResponse];
 }
 
 class ExportAttachmentFailure extends FeatureFailure {
-  final exception;
+  final dynamic exception;
 
   ExportAttachmentFailure(this.exception);
 

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

@@ -35,7 +35,7 @@ class ExportAttachmentInteractor {
 
       log('ExportAttachmentInteractor::execute(): account: $account');
 
-      final filePath = await Future.wait([
+      final downloadedResponse = await Future.wait([
           if (account.authenticationType == AuthenticationType.oidc)
             _authenticationOIDCRepository.getStoredTokenOIDC(account.id)
           else
@@ -66,7 +66,7 @@ class ExportAttachmentInteractor {
             accountRequest,
             cancelToken);
       });
-      yield Right<Failure, Success>(ExportAttachmentSuccess(filePath));
+      yield Right<Failure, Success>(ExportAttachmentSuccess(downloadedResponse));
     } catch (exception) {
       log('ExportAttachmentInteractor::execute(): exception: $exception');
       yield Left<Failure, Success>(ExportAttachmentFailure(exception));