fix: BAC-29 Implement Mappers for Common Classes (#101)

Reviewed-on: #101
Co-authored-by: Janis <janis.e.20@gmx.de>
Co-committed-by: Janis <janis.e.20@gmx.de>

knockoutwhistweb/app/dto/PlayerQueueDTO.scala

@@ -0,0 +1,22 @@
+package dto
+
+import de.knockoutwhist.control.GameLogic
+import play.api.libs.json.{Json, OFormat}
+
+case class PlayerQueueDTO(currentPlayer: Option[PlayerDTO], queue: Seq[PlayerDTO])
+
+object PlayerQueueDTO {
+
+  implicit val queueFormat: OFormat[PlayerQueueDTO] = Json.format[PlayerQueueDTO]
+
+  def apply(logic: GameLogic): PlayerQueueDTO = {
+    val currentPlayerDTO = logic.getCurrentPlayer.map(PlayerDTO(_))
+    val queueDTO = logic.getPlayerQueue.map(_.duplicate().flatMap(player => Some(PlayerDTO(player))).toSeq)
+    if (queueDTO.isEmpty) {
+      PlayerQueueDTO(currentPlayerDTO, Seq.empty)
+    } else {
+      PlayerQueueDTO(currentPlayerDTO, queueDTO.get)
+    }
+  }
+
+}