TF-48 Create and update object for compose email

model/lib/converter/avatar_id_converter.dart

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+import 'package:json_annotation/json_annotation.dart';
+import 'package:model/model.dart';
+
+class AvatarIdConverter implements JsonConverter<AvatarId, String> {
+  const AvatarIdConverter();
+
+  @override
+  AvatarId fromJson(String json) => AvatarId(json);
+
+  @override
+  String toJson(AvatarId object) => object.id;
+}

model/lib/converter/avatar_id_nullable_converter.dart

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+import 'package:json_annotation/json_annotation.dart';
+import 'package:model/model.dart';
+
+class AvatarIdNullableConverter implements JsonConverter<AvatarId?, String?> {
+  const AvatarIdNullableConverter();
+
+  @override
+  AvatarId? fromJson(String? json) => json != null ? AvatarId(json) : AvatarId.initial();
+
+  @override
+  String? toJson(AvatarId? object) => object?.id;
+}

model/lib/converter/presentation_email_address_converter.dart

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+import 'package:json_annotation/json_annotation.dart';
+import 'package:model/model.dart';
+
+class PresentationEmailAddressConverter implements JsonConverter<PresentationEmailAddress, String> {
+  const PresentationEmailAddressConverter();
+
+  @override
+  PresentationEmailAddress fromJson(String json) => PresentationEmailAddress(json);
+
+  @override
+  String toJson(PresentationEmailAddress object) => object.email;
+}

model/lib/converter/user_id_converter.dart

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+import 'package:json_annotation/json_annotation.dart';
+import 'package:model/model.dart';
+
+class UserIdConverter implements JsonConverter<UserId, String> {
+  const UserIdConverter();
+
+  @override
+  UserId fromJson(String json) => UserId(json);
+
+  @override
+  String toJson(UserId object) => object.id;
+}