From 38c4cd33e676d1e042cd3dcf30d7f3915d37d253 Mon Sep 17 00:00:00 2001
From: Joffrey Bion <joffrey.bion@gmail.com>
Date: Sun, 30 Apr 2023 03:31:12 +0200
Subject: Prevent duplicate cards even with "special free" ability

Resolves:
https://github.com/joffrey-bion/seven-wonders/issues/142
---
 .../src/main/kotlin/org/luxons/sevenwonders/engine/cards/Cards.kt      | 2 +-
 .../main/kotlin/org/luxons/sevenwonders/engine/moves/PlayCardMove.kt   | 3 +++
 .../kotlin/org/luxons/sevenwonders/engine/moves/PlayFreeCardMove.kt    | 3 +++
 3 files changed, 7 insertions(+), 1 deletion(-)

(limited to 'sw-engine/src')

diff --git a/sw-engine/src/main/kotlin/org/luxons/sevenwonders/engine/cards/Cards.kt b/sw-engine/src/main/kotlin/org/luxons/sevenwonders/engine/cards/Cards.kt
index a20f37a0..4ca87734 100644
--- a/sw-engine/src/main/kotlin/org/luxons/sevenwonders/engine/cards/Cards.kt
+++ b/sw-engine/src/main/kotlin/org/luxons/sevenwonders/engine/cards/Cards.kt
@@ -32,7 +32,7 @@ internal data class Card(
 
     private fun isChainableOn(board: Board): Boolean = !isAlreadyOnBoard(board) && isAnyParentOnBoard(board)
 
-    private fun isAlreadyOnBoard(board: Board): Boolean = board.isPlayed(name)
+    fun isAlreadyOnBoard(board: Board): Boolean = board.isPlayed(name)
 
     private fun isAnyParentOnBoard(board: Board): Boolean = chainParents.any { board.isPlayed(it) }
 
diff --git a/sw-engine/src/main/kotlin/org/luxons/sevenwonders/engine/moves/PlayCardMove.kt b/sw-engine/src/main/kotlin/org/luxons/sevenwonders/engine/moves/PlayCardMove.kt
index 66ac4e4c..f87350d4 100644
--- a/sw-engine/src/main/kotlin/org/luxons/sevenwonders/engine/moves/PlayCardMove.kt
+++ b/sw-engine/src/main/kotlin/org/luxons/sevenwonders/engine/moves/PlayCardMove.kt
@@ -9,6 +9,9 @@ internal class PlayCardMove(move: PlayerMove, card: Card, player: PlayerContext)
     CardFromHandMove(move, card, player) {
 
     init {
+        if (card.isAlreadyOnBoard(player.board)) {
+            throw InvalidMoveException(this, "card ${card.name} is already on the board")
+        }
         if (!card.isPlayableOnBoardWith(player.board, transactions)) {
             throw InvalidMoveException(this, "requirements not met to play the card ${card.name}")
         }
diff --git a/sw-engine/src/main/kotlin/org/luxons/sevenwonders/engine/moves/PlayFreeCardMove.kt b/sw-engine/src/main/kotlin/org/luxons/sevenwonders/engine/moves/PlayFreeCardMove.kt
index d4067a2b..13212e4a 100644
--- a/sw-engine/src/main/kotlin/org/luxons/sevenwonders/engine/moves/PlayFreeCardMove.kt
+++ b/sw-engine/src/main/kotlin/org/luxons/sevenwonders/engine/moves/PlayFreeCardMove.kt
@@ -13,6 +13,9 @@ internal class PlayFreeCardMove(move: PlayerMove, card: Card, playerContext: Pla
         if (!board.canPlayFreeCard(playerContext.currentAge)) {
             throw InvalidMoveException(this, "no free card available for the current age ${playerContext.currentAge}")
         }
+        if (card.isAlreadyOnBoard(board)) {
+            throw InvalidMoveException(this, "card ${card.name} is already on the board")
+        }
     }
 
     override fun place(discardedCards: MutableList<Card>) = playerContext.board.addCard(card)
-- 
cgit