TF-4195 Add interactor/repository/datasource to feature add a Label to an email

labels/lib/converter/keyword_identifier_nullable_converter.dart

@@ -0,0 +1,14 @@
+import 'package:jmap_dart_client/jmap/mail/email/keyword_identifier.dart';
+import 'package:json_annotation/json_annotation.dart';
+
+class KeywordIdentifierNullableConverter
+    implements JsonConverter<KeyWordIdentifier?, String?> {
+  const KeywordIdentifierNullableConverter();
+
+  @override
+  KeyWordIdentifier? fromJson(String? json) =>
+      json != null ? KeyWordIdentifier(json) : null;
+
+  @override
+  String? toJson(KeyWordIdentifier? object) => object?.value;
+}

labels/lib/extensions/label_extension.dart

@@ -2,6 +2,7 @@ import 'package:core/presentation/extensions/color_extension.dart';
 import 'package:core/presentation/extensions/hex_color_extension.dart';
 import 'package:flutter/material.dart';
 import 'package:jmap_dart_client/jmap/core/id.dart';
+import 'package:jmap_dart_client/jmap/mail/email/keyword_identifier.dart';
 import 'package:labels/model/hex_color.dart';
 import 'package:labels/model/label.dart';
 
@@ -28,7 +29,7 @@ extension LabelExtension on Label {
 
   Label copyWith({
     Id? id,
-    String? keyword,
+    KeyWordIdentifier? keyword,
     String? displayName,
     HexColor? color,
   }) {

labels/lib/model/label.dart

@@ -1,8 +1,10 @@
 import 'package:equatable/equatable.dart';
 import 'package:jmap_dart_client/http/converter/id_converter.dart';
 import 'package:jmap_dart_client/jmap/core/id.dart';
+import 'package:jmap_dart_client/jmap/mail/email/keyword_identifier.dart';
 import 'package:json_annotation/json_annotation.dart';
 import 'package:labels/converter/hex_color_nullable_converter.dart';
+import 'package:labels/converter/keyword_identifier_nullable_converter.dart';
 import 'package:labels/model/hex_color.dart';
 
 part 'label.g.dart';
@@ -13,11 +15,12 @@ part 'label.g.dart';
   converters: [
     IdConverter(),
     HexColorNullableConverter(),
+    KeywordIdentifierNullableConverter(),
   ],
 )
 class Label with EquatableMixin {
   final Id? id;
-  final String? keyword;
+  final KeyWordIdentifier? keyword;
   final String? displayName;
   final HexColor? color;