How to parse a Json with days received from HTTP request into a list in Scala and Play Framework

Question

I'm new to Scala and Play Framework. I have a Json like this:

{
   "monday" : [],
   "tuesday" : [
       {
          "type" : "xyz",
          "value" : 1111
       },
       {
          "type" : "abc",
          "value" : 2222
       }
   ],
   .....
}

I'm trying to reading this Json in a list, or map, that contain, for every entry, a list of type/value. I've defined a method that read the HTTP request body

def readJson() = Action { implicit request =>
      val body = request.body
      val jsonObject = body.asJson
}

I don't understand though how to continue, I've read the Play Framework documentation but I'm a bit lost. Anyone can help? Thanks!

Answer 1

You can follow this

import play.api.libs.json._

final case class Task(
    `type`: String,
    value: Int
)
final case class Days(
    monday: List[Task],
    tuesday: List[Task]
)


implicit val ts = Json.format[Task]
implicit val da = Json.format[Days]


def readJson() = Action { implicit request =>
      
      val days:Option[Days] = request.body.asJson.getOrElse(Json.obj()).asOpt[Days]
  // .....
}

or instead of mapping json to Case class, you can use jsPath see https://www.playframework.com/documentation/2.8.x/ScalaJsonCombinators