Settings.scala

package protocols

import play.api.libs.json._

/**
  * Created by Roman Potashow on 30.06.2016.
  */

//TODO rename to Schema...Builder
case class Settings(name: String, label: String, properties: List[Settings.Property])

object Settings {
  //  implicit val boolPropertyReads = Json.reads[BoolProperty]
  implicit val stringPropertyReads  = Json.reads[StringProperty]
  implicit val inReads              = new Reads[Property]() {
    override def reads(json: JsValue): JsResult[Property] = {
      def read[T: Reads] = implicitly[Reads[T]].reads((json \ "args").get)
      (json \ "type").as[String] match {
        //        case "bool"   => read[BoolProperty]
        case "string" => read[StringProperty]
      }
    }
  }
  implicit val stringPropertyWrites = Json.writes[StringProperty]
  implicit val propertyWrites       = new Writes[Property] {
    override def writes(o: Property): JsValue = {
      def write[T: Writes](x: T) = implicitly[Writes[T]].writes(x)
      val (t, data) = o match {
        case _: BoolProperty          => ("bool", None)
        case property: StringProperty => ("string", Some(write(property)))
      }
      //TODO find solution how output without subobject args
      Json.obj("type" -> t) ++ {
        data.map(args => Json.obj("args" -> args)) getOrElse Json.obj()
      }
    }
  }
  implicit val settingsFormat       = Json.format[Settings]
  sealed trait Property
  case class BoolProperty() extends Property
  case class StringProperty(name: String, label: String, defaultValue: String) extends Property
  case class MultiStringProperty(name: String, label: String, defaultValue: String, enum: Option[String] = None) extends Property
}