TF-3416 Implement preview EML attachment

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);
+}