refactor: remove unused blackjack split funcionality

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

@@ -57,13 +57,6 @@ public class BlackJackGameController {
         return ResponseEntity.ok(blackJackService.doubleDown(game));
     }
 
-    @PostMapping("/blackjack/{id}/split")
-    public ResponseEntity<Object> split(@PathVariable Long id) {
-        BlackJackGameEntity game = getBlackJackGame(id);
-
-        return ResponseEntity.ok(blackJackService.split(game));
-    }
-
     @PostMapping("/blackjack/start")
     public ResponseEntity<Object> createBlackJackGame(@RequestBody @Valid BetDto betDto) {
         Optional<UserEntity> optionalUser = userService.getCurrentUser();

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

@@ -51,15 +51,4 @@ public class BlackJackGameEntity {
     @JsonManagedReference
     @SQLRestriction("card_type = 'DEALER'")
     private List<CardEntity> dealerCards = new ArrayList<>();
-
-    @OneToMany(mappedBy = "game", cascade = CascadeType.ALL, orphanRemoval = true)
-    @JsonManagedReference
-    @SQLRestriction("card_type = 'PLAYER_SPLIT'")
-    private List<CardEntity> playerSplitCards = new ArrayList<>();
-
-    @Column(name = "split_bet")
-    private BigDecimal splitBet;
-
-    @Column(name = "is_split")
-    private boolean isSplit;
 }

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

@@ -2,8 +2,8 @@ package de.szut.casino.blackjack;
 
 import de.szut.casino.user.UserEntity;
 import de.szut.casino.user.UserRepository;
+import jakarta.transaction.Transactional;
 import org.springframework.stereotype.Service;
-import org.springframework.transaction.annotation.Transactional;
 
 import java.math.BigDecimal;
 import java.util.List;
@@ -24,7 +24,6 @@ public class BlackJackService {
         return blackJackGameRepository.findById(id).orElse(null);
     }
 
-    @Transactional
     public BlackJackGameEntity createBlackJackGame(UserEntity user, BigDecimal betAmount) {
         BlackJackGameEntity game = new BlackJackGameEntity();
         game.setUser(user);
@@ -85,36 +84,6 @@ public class BlackJackService {
         return game;
     }
 
-    @Transactional
-    public BlackJackGameEntity split(BlackJackGameEntity game) {
-        if (game.getState() != BlackJackState.IN_PROGRESS ||
-                game.getPlayerCards().size() != 2 ||
-                game.isSplit() ||
-                !game.getPlayerCards().get(0).getRank().equals(game.getPlayerCards().get(1).getRank())) {
-            return game;
-        }
-
-        UserEntity user = getUserWithFreshData(game.getUser());
-        BigDecimal splitBet = game.getBet();
-
-        if (user.getBalance().compareTo(splitBet) < 0) {
-            return game;
-        }
-
-        deductBetFromBalance(user, splitBet);
-        game.setSplitBet(splitBet);
-        game.setSplit(true);
-
-        CardEntity card = game.getPlayerCards().remove(1);
-        card.setCardType(CardType.PLAYER_SPLIT);
-        game.getPlayerSplitCards().add(card);
-
-        dealCardToPlayer(game);
-        dealCardToSplitHand(game);
-
-        return processGameBasedOnState(game);
-    }
-
     private BlackJackGameEntity processGameBasedOnState(BlackJackGameEntity game) {
         if (game.getState() != BlackJackState.IN_PROGRESS) {
             this.blackJackGameRepository.delete(game);
@@ -154,26 +123,7 @@ public class BlackJackService {
         }
     }
 
-    private void dealCardToSplitHand(BlackJackGameEntity game) {
-        CardEntity card = drawCardFromDeck(game);
-        card.setCardType(CardType.PLAYER_SPLIT);
-        game.getPlayerSplitCards().add(card);
-    }
-
     private void updateGameStateAndBalance(BlackJackGameEntity game) {
-        if (game.isSplit()) {
-            int mainHandValue = calculateHandValue(game.getPlayerCards());
-            int splitHandValue = calculateHandValue(game.getPlayerSplitCards());
-
-            if (mainHandValue > 21 && splitHandValue > 21) {
-                game.setState(BlackJackState.PLAYER_LOST);
-                updateUserBalance(game, false);
-            } else if (mainHandValue <= 21 && splitHandValue <= 21) {
-                game.setState(BlackJackState.IN_PROGRESS);
-            } else {
-                game.setState(BlackJackState.IN_PROGRESS);
-            }
-        } else {
         game.setState(getState(game));
 
         if (game.getState() == BlackJackState.PLAYER_WON) {
@@ -182,7 +132,6 @@ public class BlackJackService {
             updateUserBalance(game, false);
         }
     }
-    }
 
     private void determineWinnerAndUpdateBalance(BlackJackGameEntity game) {
         int playerValue = calculateHandValue(game.getPlayerCards());
@@ -205,41 +154,16 @@ public class BlackJackService {
         userRepository.save(user);
     }
 
-    @Transactional
     protected void updateUserBalance(BlackJackGameEntity game, boolean isWin) {
         UserEntity user = getUserWithFreshData(game.getUser());
         BigDecimal totalBet = game.getBet();
         BigDecimal balance = user.getBalance();
 
-        if (game.isSplit()) {
-            totalBet = totalBet.add(game.getSplitBet());
-
-            if (isWin) {
-                int mainHandValue = calculateHandValue(game.getPlayerCards());
-                int splitHandValue = calculateHandValue(game.getPlayerSplitCards());
-                int dealerValue = calculateHandValue(game.getDealerCards());
-
-                if (mainHandValue <= 21 && (dealerValue > 21 || mainHandValue > dealerValue)) {
-                    balance = balance.add(game.getBet().multiply(BigDecimal.valueOf(2)));
-                } else if (mainHandValue == dealerValue) {
-                    balance = balance.add(game.getBet());
-                }
-
-                if (splitHandValue <= 21 && (dealerValue > 21 || splitHandValue > dealerValue)) {
-                    balance = balance.add(game.getSplitBet().multiply(BigDecimal.valueOf(2)));
-                } else if (splitHandValue == dealerValue) {
-                    balance = balance.add(game.getSplitBet());
-                }
-            } else if (game.getState() == BlackJackState.DRAW) {
-                balance = balance.add(totalBet);
-            }
-        } else {
         if (isWin) {
             balance = balance.add(totalBet.multiply(BigDecimal.valueOf(2)));
         } else if (game.getState() == BlackJackState.DRAW) {
             balance = balance.add(totalBet);
         }
-        }
 
         user.setBalance(balance);
         userRepository.save(user);

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

@@ -36,5 +36,5 @@ public class CardEntity {
 }
 
 enum CardType {
-    DECK, PLAYER, DEALER, PLAYER_SPLIT
+    DECK, PLAYER, DEALER
 }