package easyjson

import (
	json "encoding/json"

	jlexer "github.com/mailru/easyjson/jlexer"
	"github.com/mailru/easyjson/jwriter"
)

// UnknownFieldsProxy implemets UnknownsUnmarshaler and UnknownsMarshaler
// use it as embedded field in your structure to parse and then serialize unknown struct fields
type UnknownFieldsProxy struct {
	unknownFields map[string]interface{}
}

func (s *UnknownFieldsProxy) UnmarshalUnknown(in *jlexer.Lexer, key string) {
	if s.unknownFields == nil {
		s.unknownFields = make(map[string]interface{}, 1)
	}
	s.unknownFields[key] = in.Interface()
}

func (s UnknownFieldsProxy) MarshalUnknowns(out *jwriter.Writer, first bool) {
	for key, val := range s.unknownFields {
		if first {
			first = false
		} else {
			out.RawByte(',')
		}
		out.String(string(key))
		out.RawByte(':')
		out.Raw(json.Marshal(val))
	}
}