TF-3416 Implement preview EML attachment

lib/features/email/domain/model/preview_email_eml_request.dart

@@ -0,0 +1,40 @@
+import 'package:equatable/equatable.dart';
+import 'package:flutter/material.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/user_name.dart';
+import 'package:jmap_dart_client/jmap/mail/email/email.dart';
+import 'package:tmail_ui_user/main/localizations/app_localizations.dart';
+
+class PreviewEmailEMLRequest with EquatableMixin {
+  final AccountId accountId;
+  final UserName userName;
+  final Id blobId;
+  final Email email;
+  final Locale locale;
+  final AppLocalizations appLocalizations;
+  final String baseDownloadUrl;
+
+  PreviewEmailEMLRequest({
+    required this.accountId,
+    required this.userName,
+    required this.blobId,
+    required this.email,
+    required this.locale,
+    required this.appLocalizations,
+    required this.baseDownloadUrl,
+  });
+
+  String get keyStored => blobId.value;
+
+  @override
+  List<Object?> get props => [
+    accountId,
+    userName,
+    blobId,
+    email,
+    locale,
+    appLocalizations,
+    baseDownloadUrl,
+  ];
+}

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

@@ -27,6 +27,7 @@ import 'package:tmail_ui_user/features/email/domain/model/detailed_email.dart';
 import 'package:tmail_ui_user/features/email/domain/model/email_print.dart';
 import 'package:tmail_ui_user/features/email/domain/model/event_action.dart';
 import 'package:tmail_ui_user/features/email/domain/model/move_to_mailbox_request.dart';
+import 'package:tmail_ui_user/features/email/domain/model/preview_email_eml_request.dart';
 import 'package:tmail_ui_user/features/email/domain/model/restore_deleted_message_request.dart';
 import 'package:tmail_ui_user/features/mailbox/domain/model/create_new_mailbox_request.dart';
 
@@ -181,4 +182,10 @@ abstract class EmailRepository {
     EventActionType eventActionType);
 
   Future<List<Email>> parseEmailByBlobIds(AccountId accountId, Set<Id> blobIds);
+
+  Future<String> generatePreviewEmailEMLContent(PreviewEmailEMLRequest previewEmailEMLRequest);
+
+  Future<void> sharePreviewEmailEMLContent(String keyStored, String previewEMLContent);
+
+  Future<String> getPreviewEmailEMLContentShared(String keyStored);
 }

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

@@ -0,0 +1,19 @@
+import 'package:core/presentation/state/failure.dart';
+import 'package:core/presentation/state/success.dart';
+
+class GettingPreviewEmailEMLContentShared extends LoadingState {}
+
+class GetPreviewEmailEMLContentSharedSuccess extends UIState {
+
+  final String previewEMLContent;
+
+  GetPreviewEmailEMLContentSharedSuccess(this.previewEMLContent);
+
+  @override
+  List<Object?> get props => [previewEMLContent];
+}
+
+class GetPreviewEmailEMLContentSharedFailure extends FeatureFailure {
+
+  GetPreviewEmailEMLContentSharedFailure(dynamic exception) : super(exception: exception);
+}

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

@@ -1,5 +1,6 @@
 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:jmap_dart_client/jmap/mail/email/email.dart';
 
 class ParsingEmailByBlobId extends LoadingState {}
@@ -7,11 +8,12 @@ class ParsingEmailByBlobId extends LoadingState {}
 class ParseEmailByBlobIdSuccess extends UIState {
 
   final Email email;
+  final Id blobId;
 
-  ParseEmailByBlobIdSuccess(this.email);
+  ParseEmailByBlobIdSuccess(this.email, this.blobId);
 
   @override
-  List<Object> get props => [email];
+  List<Object> get props => [email, blobId];
 }
 
 class ParseEmailByBlobIdFailure extends FeatureFailure {

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

@@ -0,0 +1,19 @@
+import 'package:core/presentation/state/failure.dart';
+import 'package:core/presentation/state/success.dart';
+
+class PreviewingEmailFromEmlFile extends LoadingState {}
+
+class PreviewEmailFromEmlFileSuccess extends UIState {
+
+  final String storeKey;
+
+  PreviewEmailFromEmlFileSuccess(this.storeKey);
+
+  @override
+  List<Object?> get props => [storeKey];
+}
+
+class PreviewEmailFromEmlFileFailure extends FeatureFailure {
+
+  PreviewEmailFromEmlFileFailure(dynamic exception) : super(exception: exception);
+}

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

@@ -0,0 +1,24 @@
+import 'package:core/presentation/state/failure.dart';
+import 'package:core/presentation/state/success.dart';
+import 'package:dartz/dartz.dart';
+import 'package:tmail_ui_user/features/email/domain/repository/email_repository.dart';
+import 'package:tmail_ui_user/features/email/domain/state/get_preview_email_content_shared_state.dart';
+
+class GetPreviewEmailEMLContentSharedInteractor {
+  final EmailRepository _emailRepository;
+
+  const GetPreviewEmailEMLContentSharedInteractor(this._emailRepository);
+
+  Stream<Either<Failure, Success>> execute(String keyStored) async* {
+    try {
+      yield Right<Failure, Success>(GettingPreviewEmailEMLContentShared());
+
+      final previewEMLContent = await _emailRepository
+        .getPreviewEmailEMLContentShared(keyStored);
+
+      yield Right<Failure, Success>(GetPreviewEmailEMLContentSharedSuccess(previewEMLContent));
+    } catch (e) {
+      yield Left<Failure, Success>(GetPreviewEmailEMLContentSharedFailure(e));
+    }
+  }
+}

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

@@ -20,7 +20,10 @@ class ParseEmailByBlobIdInteractor {
         {blobId},
       );
 
-      yield Right<Failure, Success>(ParseEmailByBlobIdSuccess(emailParsed.first));
+      yield Right<Failure, Success>(ParseEmailByBlobIdSuccess(
+        emailParsed.first,
+        blobId,
+      ));
     } catch (e) {
       yield Left<Failure, Success>(ParseEmailByBlobIdFailure(e));
     }

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

@@ -0,0 +1,31 @@
+import 'package:core/presentation/state/failure.dart';
+import 'package:core/presentation/state/success.dart';
+import 'package:dartz/dartz.dart';
+import 'package:tmail_ui_user/features/email/domain/model/preview_email_eml_request.dart';
+import 'package:tmail_ui_user/features/email/domain/repository/email_repository.dart';
+import 'package:tmail_ui_user/features/email/domain/state/preview_email_from_eml_file_state.dart';
+
+class PreviewEmailFromEmlFileInteractor {
+  final EmailRepository _emailRepository;
+
+  const PreviewEmailFromEmlFileInteractor(this._emailRepository);
+
+  Stream<Either<Failure, Success>> execute(
+    PreviewEmailEMLRequest previewEmailEMLRequest,
+  ) async* {
+    try {
+      yield Right<Failure, Success>(PreviewingEmailFromEmlFile());
+
+      final previewEMLContent = await _emailRepository
+        .generatePreviewEmailEMLContent(previewEmailEMLRequest);
+
+      final keyStored = previewEmailEMLRequest.keyStored;
+
+      await _emailRepository.sharePreviewEmailEMLContent(keyStored, previewEMLContent);
+
+      yield Right<Failure, Success>(PreviewEmailFromEmlFileSuccess(keyStored));
+    } catch (e) {
+      yield Left<Failure, Success>(PreviewEmailFromEmlFileFailure(e));
+    }
+  }
+}