Settings.scala

package lila.study

import lila.user.User

case class Settings(
    computer: Settings.UserSelection,
    explorer: Settings.UserSelection,
    cloneable: Settings.UserSelection,
    chat: Settings.UserSelection,
    sticky: Boolean
)

object Settings {

  val init = Settings(
    computer = UserSelection.Everyone,
    explorer = UserSelection.Everyone,
    cloneable = UserSelection.Everyone,
    chat = UserSelection.Member,
    sticky = true
  )

  sealed trait UserSelection {
    lazy val key = toString.toLowerCase
  }
  object UserSelection {
    case object Nobody extends UserSelection
    case object Owner extends UserSelection
    case object Contributor extends UserSelection
    case object Member extends UserSelection
    case object Everyone extends UserSelection
    val byKey = List(Nobody, Owner, Contributor, Member, Everyone).map { v => v.key -> v }.toMap

    def allows(sel: UserSelection, study: Study, userId: Option[User.ID]): Boolean = sel match {
      case Nobody => false
      case Everyone => true
      case Member => userId ?? study.isMember
      case Contributor => userId ?? study.canContribute
      case Owner => userId ?? study.isOwner
    }
  }
}