Implement cemeteries

app/controllers/Round.scala

@@ -11,7 +11,7 @@ object Round extends LilaController {
   val socket = env.round.socket
 
   def watcher(gameId: String, color: String) = Open { implicit ctx ⇒
-    IOption(gameRepo pov gameId) { pov ⇒
+    IOption(gameRepo.pov(gameId, color)) { pov ⇒
       html.round.watcher(pov, version(pov.gameId))
     }
   }

app/game/DbGame.scala

@@ -3,7 +3,7 @@ package game
 
 import round.{ Event, Progress }
 import user.User
-import chess.{ History ⇒ ChessHistory, Board, Move, Pos, Game, Clock, Status, Color, Piece, Variant }
+import chess.{ History ⇒ ChessHistory, Role, Board, Move, Pos, Game, Clock, Status, Color, Piece, Variant }
 import Color._
 import chess.format.{ PgnReader, Fen }
 import chess.Pos.piotr
@@ -295,6 +295,10 @@ case class DbGame(
   )
 
   def nextId: Option[String] = next map (_.getId.toString)
+
+  def deadPiecesOf(color: Color): List[Role] = toChess.deads collect {
+    case (_, piece) if piece is color => piece.role
+  }
 }
 
 object DbGame {

app/game/GameRepo.scala

@@ -34,6 +34,9 @@ class GameRepo(collection: MongoCollection)
       gameOption map { g ⇒ Pov(g, g player color) }
     }
 
+  def pov(gameId: String, color: String): IO[Option[Pov]] =
+    Color(color).fold(pov(gameId, _), io(None))
+
   def pov(fullId: String): IO[Option[Pov]] =
     game(fullId take gameIdSize) map { gameOption ⇒
       gameOption flatMap { g ⇒

app/views/round/cemetery.scala.html

@@ -1,3 +1,9 @@
 @(pov: Pov, position: String)(implicit ctx: Context)
 
-cemetery for @pov.color
+@import pov._
+
+<div class="lichess_cemetery lichess_cemetery_@position @player.color">
+  @game.deadPiecesOf(color).map { role =>
+  <div class="lichess_tomb"><div class="lichess_piece @role.name @color"></div></div>
+  }
+</div>