[Scala] Circe의 HCursor을 Map으로 변환하기

import io.circe.parser.{parse => circeParse}

val result = for {
  json <- circeParse(targetJson)
  result <- json.as[Map[String, Option[String]]]
} yield result

import io.circe._

implicit val defaultEventDecoder: Decoder[Map[String, Option[String]]] = (c: HCursor) => {
  Right(c
    .keys
    .getOrElse(Iterable.empty).map(jsonProperty => {
    jsonProperty -> c.get[String](jsonProperty).toOption
  }).toMap)
}