feat(websocket)!: Implement WebSocket connection and event handling

knockoutwhistweb/app/logic/PodManager.scala

@@ -11,14 +11,14 @@ import util.GameUtil
 import javax.inject.Singleton
 import scala.collection.mutable
 
-@Singleton
-class PodManager {
+object PodManager {
 
   val TTL: Long = System.currentTimeMillis() + 86400000L // 24 hours in milliseconds
   val podIp: String = System.getenv("POD_IP")
   val podName: String = System.getenv("POD_NAME")
   
   private val sessions: mutable.Map[String, GameLobby] = mutable.Map()
+  private val userSession: mutable.Map[User, String] = mutable.Map()
   private val injector: Injector = Guice.createInjector(KnockOutWebConfigurationModule())
   
   def createGame(
@@ -35,6 +35,7 @@ class PodManager {
       host = host
     )
     sessions += (gameLobby.id -> gameLobby)
+    userSession += (host -> gameLobby.id)
     gameLobby
   }
 
@@ -44,6 +45,30 @@ class PodManager {
   
   private[logic] def removeGame(gameId: String): Unit = {
     sessions.remove(gameId)
+    // Also remove all user sessions associated with this game
+    userSession.filterInPlace((_, v) => v != gameId)
   }
+  
+  def registerUserToGame(user: User, gameId: String): Boolean = {
+    if (sessions.contains(gameId)) {
+      userSession += (user -> gameId)
+      true
+    } else {
+      false
+    }
+  }
+  
+  def unregisterUserFromGame(user: User): Unit = {
+    userSession.remove(user)
+  }
+  
+  def identifyGameOfUser(user: User): Option[GameLobby] = {
+    userSession.get(user) match {
+      case Some(gameId) => sessions.get(gameId)
+      case None => None
+    }
+  }
+  
+  
 
 }