Add converter for ErrorType

Author: dab246

lib/http/converter/error_type_converter.dart

@@ -0,0 +1,13 @@
+
+import 'package:jmap_dart_client/jmap/core/error/error_type.dart';
+import 'package:json_annotation/json_annotation.dart';
+
+class ErrorTypeConverter implements JsonConverter<ErrorType, String> {
+  const ErrorTypeConverter();
+
+  @override
+  ErrorType fromJson(String json) => ErrorType(json);
+
+  @override
+  String toJson(ErrorType object) => object.value;
+}

lib/jmap/core/error/error_type.dart

@@ -1,18 +1,10 @@
 import 'package:equatable/equatable.dart';
-import 'package:json_annotation/json_annotation.dart';
 
-part 'error_type.g.dart';
-
-@JsonSerializable()
 class ErrorType with EquatableMixin {
   final String value;
 
   ErrorType(this.value);
 
   @override
   List<Object> get props => [value];
-
-  factory ErrorType.fromJson(Map<String, dynamic> json) => _$ErrorTypeFromJson(json);
-
-  Map<String, dynamic> toJson() => _$ErrorTypeToJson(this);
 }

lib/jmap/core/error/error_type.g.dart

@@ -1,9 +1,11 @@
 import 'package:equatable/equatable.dart';
+import 'package:jmap_dart_client/http/converter/error_type_converter.dart';
 import 'package:jmap_dart_client/jmap/core/error/error_type.dart';
 import 'package:json_annotation/json_annotation.dart';
 
 part 'set_error.g.dart';
 
+@ErrorTypeConverter()
 @JsonSerializable(explicitToJson: true)
 class SetError with EquatableMixin {
   final ErrorType type;