fix: delete orhpaned blackjack games

backend/src/main/java/de/szut/casino/blackjack/BlackJackService.java

@@ -36,7 +36,7 @@ public class BlackJackService {
         game.setState(getState(game));
         deductBetFromBalance(user, betAmount);
 
-        return blackJackGameRepository.save(game);
+        return processGameBasedOnState(game);
     }
 
     @Transactional
@@ -46,10 +46,9 @@ public class BlackJackService {
         }
 
         dealCardToPlayer(game);
-        
         updateGameStateAndBalance(game);
 
-        return blackJackGameRepository.save(game);
+        return processGameBasedOnState(game);
     }
 
     @Transactional
@@ -61,7 +60,7 @@ public class BlackJackService {
         dealCardsToDealerUntilMinimumScore(game);
         determineWinnerAndUpdateBalance(game);
 
-        return blackJackGameRepository.save(game);
+        return processGameBasedOnState(game);
     }
 
     @Transactional
@@ -116,6 +115,15 @@ public class BlackJackService {
         return blackJackGameRepository.save(game);
     }
 
+    private BlackJackGameEntity processGameBasedOnState(BlackJackGameEntity game) {
+        if (game.getState() != BlackJackState.IN_PROGRESS) {
+            this.blackJackGameRepository.delete(game);
+            return game;
+        }
+
+        return blackJackGameRepository.save(game);
+    }
+
     private BlackJackGameEntity refreshGameState(BlackJackGameEntity game) {
         return blackJackGameRepository.findById(game.getId()).orElse(game);
     }