[feat] 플레이어 준비 상태 변경 기능

backend/src/main/java/io/f1/backend/domain/game/app/RoomService.java

@@ -10,6 +10,7 @@
 import static io.f1.backend.global.util.SecurityUtils.getCurrentUserId;
 import static io.f1.backend.global.util.SecurityUtils.getCurrentUserNickname;
 
+import io.f1.backend.domain.game.dto.PlayerReadyData;
 import io.f1.backend.domain.game.dto.RoomEventType;
 import io.f1.backend.domain.game.dto.RoomExitData;
 import io.f1.backend.domain.game.dto.RoomInitialData;
@@ -183,6 +184,22 @@ public RoomExitData exitRoom(Long roomId, String sessionId) {
         }
     }
 
+    public PlayerReadyData handlePlayerReady(Long roomId, String sessionId) {
+        Player player =
+                roomRepository
+                        .findPlayerInRoomBySessionId(roomId, sessionId)
+                        .orElseThrow(() -> new CustomException(RoomErrorCode.PLAYER_NOT_FOUND));
+
+        player.toggleReady();
+
+        String destination = getDestination(roomId);
+
+        Room room = findRoom(roomId);
+        PlayerListResponse playerListResponse = toPlayerListResponse(room);
+
+        return new PlayerReadyData(destination, playerListResponse);
+    }
+
     public RoomListResponse getAllRooms() {
         List<Room> rooms = roomRepository.findAll();
         List<RoomResponse> roomResponses =

backend/src/main/java/io/f1/backend/domain/game/dto/PlayerReadyData.java

@@ -0,0 +1,5 @@
+package io.f1.backend.domain.game.dto;
+
+import io.f1.backend.domain.game.dto.response.PlayerListResponse;
+
+public record PlayerReadyData(String destination, PlayerListResponse response) {}

backend/src/main/java/io/f1/backend/domain/game/store/RoomRepository.java

@@ -1,16 +1,20 @@
 package io.f1.backend.domain.game.store;
 
+import io.f1.backend.domain.game.model.Player;
 import io.f1.backend.domain.game.model.Room;
 
 import java.util.List;
 import java.util.Optional;
 
 public interface RoomRepository {
+
     void saveRoom(Room room);
 
     Optional<Room> findRoom(Long roomId);
 
     List<Room> findAll();
 
     void removeRoom(Long roomId);
+
+    Optional<Player> findPlayerInRoomBySessionId(Long roomId, String sessionId);
 }

backend/src/main/java/io/f1/backend/domain/game/store/RoomRepositoryImpl.java

@@ -1,5 +1,6 @@
 package io.f1.backend.domain.game.store;
 
+import io.f1.backend.domain.game.model.Player;
 import io.f1.backend.domain.game.model.Room;
 
 import org.springframework.stereotype.Repository;
@@ -35,6 +36,11 @@ public void removeRoom(Long roomId) {
         roomMap.remove(roomId);
     }
 
+    @Override
+    public Optional<Player> findPlayerInRoomBySessionId(Long roomId, String sessionId) {
+        return findRoom(roomId).map(room -> room.getPlayerSessionMap().get(sessionId));
+    }
+
     // 테스트 전용 메소드
     public Room getRoomForTest(Long roomId) {
         return roomMap.get(roomId);

backend/src/main/java/io/f1/backend/domain/game/websocket/GameSocketController.java

@@ -4,6 +4,7 @@
 import io.f1.backend.domain.game.app.RoomService;
 import io.f1.backend.domain.game.dto.GameStartData;
 import io.f1.backend.domain.game.dto.MessageType;
+import io.f1.backend.domain.game.dto.PlayerReadyData;
 import io.f1.backend.domain.game.dto.RoomExitData;
 import io.f1.backend.domain.game.dto.RoomInitialData;
 import io.f1.backend.domain.game.dto.request.GameStartRequest;
@@ -31,6 +32,7 @@ public void initializeRoomSocket(@DestinationVariable Long roomId, Message<?> me
 
         RoomInitialData roomInitialData =
                 roomService.initializeRoomSocket(roomId, websocketSessionId);
+
         String destination = roomInitialData.destination();
 
         messageSender.send(
@@ -72,6 +74,16 @@ public void gameStart(@DestinationVariable Long roomId, Message<GameStartRequest
         messageSender.send(destination, MessageType.GAME_START, gameStartData.gameStartResponse());
     }
 
+    @MessageMapping("/room/ready/{roomId}")
+    public void playerReady(@DestinationVariable Long roomId, Message<?> message) {
+
+        PlayerReadyData playerReadyData =
+                roomService.handlePlayerReady(roomId, getSessionId(message));
+
+        messageSender.send(
+                playerReadyData.destination(), MessageType.PLAYER_LIST, playerReadyData.response());
+    }
+
     private static String getSessionId(Message<?> message) {
         StompHeaderAccessor accessor = StompHeaderAccessor.wrap(message);
         return accessor.getSessionId();

backend/src/main/java/io/f1/backend/global/exception/errorcode/RoomErrorCode.java

@@ -12,6 +12,7 @@ public enum RoomErrorCode implements ErrorCode {
     ROOM_GAME_IN_PROGRESS("E403003", HttpStatus.FORBIDDEN, "게임이 진행 중 입니다."),
     ROOM_NOT_FOUND("E404005", HttpStatus.NOT_FOUND, "존재하지 않는 방입니다."),
     WRONG_PASSWORD("E401006", HttpStatus.UNAUTHORIZED, "비밀번호가 일치하지않습니다."),
+    PLAYER_NOT_FOUND("E404007", HttpStatus.NOT_FOUND, "존재하지 않는 플레이어입니다."),
     SOCKET_SESSION_NOT_FOUND("E404006", HttpStatus.NOT_FOUND, "존재하지 않는 소켓 세션입니다.");
 
     private final String code;