package controllers
import scala.concurrent.Future
import javax.inject.Inject
import play.api.mvc._
import play.api.libs.concurrent.Execution.Implicits.defaultContext
import formats.stateFormat

class Sms @Inject() (service: SmsService) extends Controller {

  def getState() =
    Action async { request =>
      service map { state =>
        Ok(state)
      }
    }

}

//-----------------------------------------------------------------------------------------------------------------------

package object controllers {

  implicit def model2JsonWritable[M](implicit c: Codec, w: Writes[M]) =
    Writeable[M] { m: M => c.encode(Json.stringify(Json.toJson[M](m))) }

}

//-----------------------------------------------------------------------------------------------------------------------
package services

@Singleton
class SmsService {

  def getState(): Future[State] =
    Future successful State("Some state")

}

//-----------------------------------------------------------------------------------------------------------------------
package models

case class State(title: String)

//-----------------------------------------------------------------------------------------------------------------------
import play.api.libs.json._
import play.api.libs.functional.syntax._

package object formats {

  val stateFormat =
    (__ \ 'state).format[State](State, unlift(State.unapply))

}