feat(ui): Implement countless feature using the SJWP (#89)

Co-authored-by: LQ63 <lkhermann@web.de>
Reviewed-on: #89

knockoutwhistweb/app/util/mapper/NewRoundEventMapper.scala

@@ -0,0 +1,18 @@
+package util.mapper
+
+import de.knockoutwhist.events.global.NewRoundEvent
+import logic.game.GameLobby
+import model.sessions.UserSession
+import play.api.libs.json.{JsObject, Json}
+
+object NewRoundEventMapper extends SimpleEventMapper[NewRoundEvent]{
+  override def id: String = "NewRoundEvent"
+
+  override def toJson(event: NewRoundEvent, session: UserSession): JsObject = {
+    val gameLobby = session.gameLobby
+    Json.obj(
+      "trumpsuit" -> gameLobby.getLogic.getCurrentRound.get.trumpSuit.toString,
+      "players" -> gameLobby.getLogic.getCurrentMatch.get.playersIn.map(player => player.toString)
+    )
+  }
+}