feat(websocket)!: Implement WebSocket connection and event handling (#82)

Co-authored-by: LQ63 <lkhermann@web.de>
Reviewed-on: #82
Co-authored-by: Janis <janis.e.20@gmx.de>
Co-committed-by: Janis <janis.e.20@gmx.de>

knockoutwhistweb/app/logic/PodManager.scala

@@ -11,20 +11,20 @@ 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(
-                host: User,
-                name: String,
-                maxPlayers: Int
+                  host: User,
+                  name: String,
+                  maxPlayers: Int
                 ): GameLobby = {
     val gameLobby = GameLobby(
       logic = BaseGameLogic(injector.getInstance(classOf[Configuration])),
@@ -35,15 +35,39 @@ class PodManager {
       host = host
     )
     sessions += (gameLobby.id -> gameLobby)
+    userSession += (host -> gameLobby.id)
     gameLobby
   }
 
   def getGame(gameId: String): Option[GameLobby] = {
     sessions.get(gameId)
   }
-  
-  private[logic] def removeGame(gameId: String): Unit = {
-    sessions.remove(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
+    }
+  }
+
+  private[logic] def removeGame(gameId: String): Unit = {
+    sessions.remove(gameId)
+    // Also remove all user sessions associated with this game
+    userSession.filterInPlace((_, v) => v != gameId)
+  }
+
+
 }