change cardOnCurrentStack on lastCardPlayer

src/main/kotlin/eventDemo/business/event/projection/GameState.kt

@@ -12,7 +12,7 @@ data class GameState(
   override val lastEventVersion: Int = 0,
   val players: Set<Player> = emptySet(),
   val currentPlayerTurn: Player? = null,
-  val cardOnCurrentStack: LastCard? = null,
+  val lastCardPlayer: Player? = null,
   val colorOnCurrentStack: Card.Color? = null,
   val direction: Direction = Direction.CLOCKWISE,
   val readyPlayers: Set<Player> = emptySet(),
@@ -20,12 +20,6 @@ data class GameState(
   val isStarted: Boolean = false,
   val playerWins: Set<Player> = emptySet(),
 ) : Projection<GameId> {
-  @Serializable
-  data class LastCard(
-    val card: Card,
-    val player: Player,
-  )
-
   enum class Direction {
     CLOCKWISE,
     COUNTER_CLOCKWISE,
@@ -39,6 +33,8 @@ data class GameState(
       }
   }
 
+  val cardOnCurrentStack: Card? = deck.discard.lastOrNull()
+
   val isReady: Boolean get() {
     return players.size == readyPlayers.size && players.all { readyPlayers.contains(it) }
   }
@@ -98,8 +94,8 @@ data class GameState(
     }.let { it % players.size }
 
   val Player.cardOnBoardIsForYou: Boolean get() {
-    if (cardOnCurrentStack == null) error("No card")
-    return this.playerDiffIndex(cardOnCurrentStack.player) == 1
+    if (lastCardPlayer == null) error("No card")
+    return this.playerDiffIndex(lastCardPlayer) == 1
   }
 
   fun playableCards(player: Player): List<Card> =
@@ -118,7 +114,7 @@ data class GameState(
     player: Player,
     card: Card,
   ): Boolean {
-    val cardOnBoard = cardOnCurrentStack?.card ?: return false
+    val cardOnBoard = cardOnCurrentStack ?: return false
     return when (cardOnBoard) {
       is Card.NumericCard -> {
         when (card) {
@@ -159,9 +155,8 @@ data class GameState(
           true
         } else {
           when (card) {
-            is Card.AllColorCard -> true
             is Card.Plus2Card -> true
-            is Card.ColorCard -> card.color == cardOnBoard.color
+            else -> false
           }
         }
       }

src/main/kotlin/eventDemo/business/event/projection/GameStateBuilder.kt

@@ -53,7 +53,7 @@ fun GameState.apply(event: GameEvent): GameState =
           currentPlayerTurn = currentPlayerAfterThePlay,
           direction = nextDirectionAfterPlay,
           colorOnCurrentStack = color,
-          cardOnCurrentStack = GameState.LastCard(event.card, event.player),
+          lastCardPlayer = event.player,
           deck = state.deck.putOneCardFromHand(event.player, event.card),
         )
       }
@@ -97,7 +97,7 @@ fun GameState.apply(event: GameEvent): GameState =
       is GameStartedEvent -> {
         state.copy(
           colorOnCurrentStack = (event.deck.discard.first() as? Card.ColorCard)?.color ?: state.colorOnCurrentStack,
-          cardOnCurrentStack = GameState.LastCard(event.deck.discard.first(), event.firstPlayer),
+          lastCardPlayer = null,
           currentPlayerTurn = event.firstPlayer,
           deck = event.deck,
           isStarted = true,