Merge pull request 'refactor: refactor state logic' (!106) from refactor/state-logic into main

Reviewed-on: #106

backend/requests/blackjack.http

@@ -7,6 +7,6 @@ Content-Type: application/json
 }
 
 ###
-POST http://localhost:8080/blackjack/202/hit
+POST http://localhost:8080/blackjack/54/hit
 Authorization: Bearer {{token}}
 

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

@@ -46,7 +46,7 @@ public class BlackJackGameController {
             return ResponseEntity.badRequest().body(errorResponse);
         }
 
-        return ResponseEntity.ok(blackJackService.hit(game));
+        return ResponseEntity.ok(blackJackService.hit(game, user));
     }
 
     @PostMapping("/blackjack/start")

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

@@ -42,14 +42,7 @@ public class BlackJackService {
         dealerCard.setCardType(CardType.DEALER);
         game.getDealerCards().add(dealerCard);
 
-        BlackJackState state = getState(game);
-        if (state == BlackJackState.PLAYER_BLACKJACK) {
-            BigDecimal blackjackWinnings = betAmount.multiply(new BigDecimal("1.5"));
-            user.setBalance(user.getBalance().add(blackjackWinnings));
-        } else {
-            user.setBalance(user.getBalance().subtract(betAmount));
-        }
-
+        BlackJackState state = handleState(game, user);
         game.setState(state);
 
         userRepository.save(user);
@@ -58,12 +51,12 @@ public class BlackJackService {
         return game;
     }
 
-    public BlackJackGameEntity hit(BlackJackGameEntity game) {
+    public BlackJackGameEntity hit(BlackJackGameEntity game, UserEntity user) {
         CardEntity drawnCard = drawCardFromDeck(game);
         drawnCard.setCardType(CardType.PLAYER);
         game.getPlayerCards().add(drawnCard);
 
-        game.setState(getState(game));
+        game.setState(handleState(game, user));
 
         return blackJackGameRepository.save(game);
     }
@@ -91,12 +84,25 @@ public class BlackJackService {
         return game.getDeck().removeFirst();
     }
 
-    private BlackJackState getState(BlackJackGameEntity game) {
+    private BlackJackState handleState(BlackJackGameEntity game, UserEntity user) {
         int playerHandValue = calculateHandValue(game.getPlayerCards());
 
         if (playerHandValue == 21) {
-            return BlackJackState.PLAYER_BLACKJACK;
+            CardEntity hole = drawCardFromDeck(game);
+            hole.setCardType(CardType.DEALER);
+            game.getDealerCards().add(hole);
+
+            int dealerHandValue = calculateHandValue(game.getDealerCards());
+
+            if (dealerHandValue == 21) {
+                return BlackJackState.STANDOFF;
+            } else {
+                BigDecimal blackjackWinnings = game.getBet().multiply(new BigDecimal("1.5"));
+                user.setBalance(user.getBalance().add(blackjackWinnings));
+                return BlackJackState.PLAYER_BLACKJACK;
+            }
         } else if (playerHandValue > 21) {
+            user.setBalance(user.getBalance().subtract(game.getBet()));
             return BlackJackState.PLAYER_LOST;
         }
 

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

@@ -4,4 +4,5 @@ public enum BlackJackState {
     IN_PROGRESS,
     PLAYER_BLACKJACK,
     PLAYER_LOST,
+    STANDOFF,
 }

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

@@ -31,6 +31,7 @@ public class CardEntity {
     private Rank rank;
 
     @Enumerated(EnumType.STRING)
+    @JsonIgnore
     private CardType cardType;
 }