feat: BAC-30 Implement Jackson Mapping via DTOs (#102)

Reviewed-on: #102
Co-authored-by: Janis <janis.e.20@gmx.de>
Co-committed-by: Janis <janis.e.20@gmx.de>

knockoutwhistweb/app/dto/LobbyInfoDTO.scala

@@ -0,0 +1,21 @@
+package dto
+
+import dto.subDTO.UserDTO
+import logic.game.GameLobby
+import model.users.User
+
+case class LobbyInfoDTO(users: List[UserDTO], self: UserDTO, maxPlayers: Int)
+
+object LobbyInfoDTO {
+
+  def apply(lobby: GameLobby, user: User): LobbyInfoDTO = {
+    val session = lobby.getUserSession(user.id)
+    
+    LobbyInfoDTO(
+      users = lobby.getPlayers.values.map(user => UserDTO(user)).toList,
+      self = UserDTO(session),
+      maxPlayers = lobby.maxPlayers,
+    )
+  }
+
+}