Daimon.scala #8 やってみよう

gistfile1.scala

/**
 * Daimon.scala #8 やってみよう
 * http://d.hatena.ne.jp/seratch2/20110507/1304777166
 * 以下のPlayer、Gameをそれぞれアクターとして定義して山手線ゲームをコメント例のように実行できるようにしてください。
 */

import actors.Actor

case object Get
case class IsUsed(station: Station)
case class MarkAsUsed(station: Station)
case class MarkAsUsedResponse(isMarkedAsUsed: Boolean)
case class Station(name: String)

class Yamanotesen extends Actor {
  start()
  def act() = loop {
    react {
      case Get => sender ! randomStation
      case IsUsed(station) => sender ! used.contains(station)
      case MarkAsUsed(station) => {
        used += station
        sender ! MarkAsUsedResponse(used.contains(station))
      }
      case _ => throw new IllegalArgumentException
    }
  }
  def randomStation: Station = { 
    stations(new java.util.Random().nextInt(stations.length))
  }
  private val stations: List[Station] = List(
    Station("東京")
   ,Station("有楽町")
   ,Station("新橋")
   ,Station("浜松町")
   ,Station("田町")
   ,Station("品川")
   ,Station("大崎")
   ,Station("五反田")
   ,Station("目黒")
   ,Station("恵比寿")
   ,Station("渋谷")
   ,Station("原宿")
   ,Station("代々木")
   ,Station("新宿")
   ,Station("新大久保")
   ,Station("高田馬場")
   ,Station("目白")
   ,Station("池袋")
   ,Station("大塚")
   ,Station("巣鴨")
   ,Station("駒込")
   ,Station("田端")
   ,Station("西日暮里")
   ,Station("日暮里")
   ,Station("御徒町")
   ,Station("秋葉原")
   ,Station("神田")
  )
  import collection.mutable.{Set,HashSet}
  private var used: Set[Station] = new HashSet[Station]
}

case object Start
case object End

case class Game(players: Player*) extends Actor {
  start()
  def act() = loop {
    react {
      case Start => this ! players(0)
      case player: Player => {
        println("パンパン！")
        player ! yamanote
      }
      case (player: Player, station: Station) => {
        val isUsed = (yamanote !? IsUsed(station)).asInstanceOf[Boolean]
        if ( !isUsed ) { 
          println(player.name + "「" + station.name + "」")
          yamanote !? MarkAsUsed(station)
          this ! next(player)
        } else {
          println(player.name + "「" + station.name + "・・あっ！」")
          this ! End
        }
      }
      case End => System.exit(0)
      case _ => throw new IllegalArgumentException
    }
  }
  val yamanote = new Yamanotesen
  def next(player: Player): Player = {
    val idx = players.indexOf(player)
    if (idx == players.length-1) players(0) else players(idx+1)
  }
}

case class Player(name: String) extends Actor {
  start()
  def act() = loop { 
    react { 
      case yamanote: Yamanotesen => sender ! (this, yamanote !? Get)
      case _ => throw new IllegalArgumentException
    } 
  }
}

val Andy = new Player("Andy")
val Brian = new Player("Brian")
new Game(Andy,Brian) ! Start

Thread.sleep(5000L)
System.exit(0)

/*
パンパン！
Andy「浜松町」
パンパン！
Brian「日暮里」
パンパン！
Andy「大塚」
パンパン！
Brian「目白」
パンパン！
Andy「品川」
パンパン！
Brian「恵比寿」
パンパン！
Andy「日暮里・・あっ！」
*/

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