remove /fen and watcher

app/controllers/Analyse.scala

@@ -95,11 +95,4 @@ object Analyse extends LilaController {
   private def gameOpening(game: GameModel) =
     if (game.fromPosition || game.variant.exotic) none
     else chess.OpeningExplorer openingOf game.pgnMoves
-
-  def fen(id: String) = Open { implicit ctx =>
-    OptionOk(GameRepo game id) { game =>
-      Env.round fenUrlWatch game
-      chess.format.Forsyth >> game.toChess
-    }
-  }
 }

conf/routes

@@ -143,7 +143,6 @@ POST  /$gameId<\w{8}>/request-analysis    controllers.Analyse.requestAnalysis(ga
 POST  /$gameId<\w{8}>/better-analysis/$color<white|black> controllers.Analyse.betterAnalysis(gameId: String, color: String)
 POST  /$gameId<\w{8}>/post-analysis       controllers.Analyse.postAnalysis(gameId: String)
 GET   /$gameId<\w{8}>/pgn                 controllers.Analyse.pgn(gameId: String)
-GET   /$gameId<\w{8}>/fen                 controllers.Analyse.fen(gameId: String)
 
 # Pref
 POST  /pref/:name                      controllers.Pref.set(name: String)

modules/round/src/main/Env.scala

@@ -128,11 +128,6 @@ final class Env(
     chat = hub.actor.chat,
     i18nKeys = i18nKeys)
 
-  lazy val fenUrlWatch = new FenUrlWatch(
-    roundMap = roundMap,
-    reporter = hub.actor.report,
-    scheduler = system.scheduler)
-
   def version(gameId: String): Fu[Int] =
     socketHub ? Ask(gameId, GetVersion) mapTo manifest[Int]
 

modules/round/src/main/FenUrlWatch.scala

@@ -1,36 +0,0 @@
-package lila.round
-
-import scala.concurrent.duration._
-
-import actorApi.round.Cheat
-import lila.game.Game
-import lila.hub.actorApi.map.Tell
-
-private[round] final class FenUrlWatch(
-    roundMap: akka.actor.ActorRef,
-    reporter: akka.actor.ActorSelection,
-    scheduler: akka.actor.Scheduler) {
-
-  private val stack = lila.memo.Builder.expiry[String, Int](30.seconds)
-
-  def apply(game: Game) {
-    if (game.playable) {
-      val id = game.id + game.turnColor.name.head
-      ~Option(stack getIfPresent id) match {
-        case nb if nb < 5 => stack.put(id, nb + 1)
-        case nb =>
-          play.api.Logger("FenUrlWatch").warn(s"Detected http://lichess.org/${game.id} ${game.turnColor}")
-          stack.invalidate(id)
-          scheduler.scheduleOnce(
-            (1 + scala.util.Random.nextInt(15)).seconds,
-            roundMap,
-            Tell(game.id, Cheat(game.turnColor))
-          )
-          game.player.userId foreach { userId =>
-            reporter ! lila.hub.actorApi.report.Cheater(userId,
-              s"Cheat detected on http://lichess.org/${game.id}, using a FEN bot.")
-          }
-      }
-    }
-  }
-}