tpl.txt

class {{.ClassName}} {{"{"}}{{range $i, $e := .Fields}}
  final {{$e.DataType}} {{$e.FieldName}};{{end}}

  const {{.ClassName}}({{range $i, $e := .Fields}}{{if gt $i 0}}, {{end}}this.{{$e.FieldName}}{{end}});

  factory {{.ClassName}}.instance() {
    return {{.ClassName}}.fromMap({});
  }

  factory {{.ClassName}}.fromMap(Map<{{.DartMapKeyType}}, {{.DartMapValueType}}> m) {
    return {{.ClassName}}({{range $i, $e := .Fields}}
      m.containsKey("{{$e.JsonName}}") && m["{{$e.JsonName}}"] != null ? {{if $e.ClassArray}}(m["{{$e.JsonName}}"] as List<dynamic>).map((a) => a as Map<String, dynamic>).map((a) => {{$e.InnerDataType}}.fromMap(a)).toList(){{else if $e.Array}}(m["{{$e.JsonName}}"] as List<dynamic>).map((a) => a as {{$e.InnerDataType}}).toList(){{else}}{{if eq $e.Default "null"}}{{$e.DataType}}.fromMap(m["{{$e.JsonName}}"]){{else}}m["{{$e.JsonName}}"]{{end}}{{end}}: {{if eq $e.Default "null"}}{{$e.DataType}}.instance(){{else}}{{$e.Default}}{{end}},{{end}}
    );
  }

  Map<{{.DartMapKeyType}}, {{.DartMapValueType}}> toMap() {
    return {{"{"}}{{range $i, $e := .Fields}}
      "{{$e.FieldName}}": {{$e.FieldName}},{{end}}
    };
  }

  Map<{{.DartMapKeyType}}, {{.DartMapValueType}}> toOriginalMap() {
    return {{"{"}}{{range $i, $e := .Fields}}
      "{{$e.JsonName}}": {{$e.FieldName}},{{end}}
    };
  }

  String toJson() {
    return jsonEncode(toMap());
  }

  String toOriginalJson() {
    return jsonEncode(toOriginalMap());
  }

  @override
  String toString() {
    return '{{"{"}}{{range $i, $e := .Fields}}{{if gt $i 0}}, {{end}}{{$e.FieldName}}: {{"$"}}{{$e.FieldName}}{{end}}{{"}"}}';
  }
}