Feat/39: Live Session API

docs/error_code.md

@@ -58,6 +58,10 @@
 
 - **COMMENT404: 존재하지 않는 댓글입니다.**
 
+## ✅ **Live Session 오류**
+
+- **LIVE_SESSION404: 존재하지 않는 Live Session id 값입니다.**
+
 ---
 
 ## ✅ **페이징 오류**

src/main/java/com/woori/codeshare/room/controller/RoomController.java

@@ -2,6 +2,8 @@
 
 import com.woori.codeshare.global.response.ApiResponse;
 import com.woori.codeshare.global.response.ResponseCode;
+import com.woori.codeshare.room.controller.dto.LiveSessionRequestDTO;
+import com.woori.codeshare.room.controller.dto.LiveSessionResponseDTO;
 import com.woori.codeshare.room.controller.dto.RoomRequestDTO;
 import com.woori.codeshare.room.controller.dto.RoomResponseDTO;
 import com.woori.codeshare.room.service.RoomService;
@@ -54,5 +56,31 @@ public ResponseEntity<ApiResponse<RoomResponseDTO.RoomEnterResponse>> enterRoom(
         RoomResponseDTO.RoomEnterResponse responseDTO = roomService.enterRoomByUuid(uuid, password);
         return ResponseEntity.ok(ApiResponse.of(ResponseCode.CONFIRM, responseDTO));
     }
+
+    /**
+     * 현재 코드 세션 저장 API
+     */
+    @PostMapping("/{roomId}/live-session/save")
+    @Operation(summary = "현재 코드 세션 저장 API", description = "특정 방의 실시간 코드 내용을 저장합니다.")
+    public ResponseEntity<ApiResponse<LiveSessionResponseDTO.LiveSessionResponse>> saveLiveSession(
+            @PathVariable Long roomId,
+            @RequestBody LiveSessionRequestDTO.LiveSessionRequest request) {
+
+        LiveSessionResponseDTO.LiveSessionResponse response = roomService.saveLiveSession(roomId, request);
+        return ResponseEntity.ok(ApiResponse.of(ResponseCode.SUCCESS, response));
+    }
+
+    /**
+     * 현재 코드 세션 조회 API
+     */
+    @GetMapping("/{roomId}/live-session")
+    @Operation(summary = "현재 코드 세션 조회 API", description = "특정 방의 실시간 코드 내용을 조회합니다.")
+    public ResponseEntity<ApiResponse<LiveSessionResponseDTO.LiveSessionResponse>> getLiveSession(
+            @PathVariable Long roomId) {
+
+        LiveSessionResponseDTO.LiveSessionResponse response = roomService.getLiveSession(roomId);
+        return ResponseEntity.ok(ApiResponse.of(ResponseCode.SUCCESS, response));
+    }
+
 }
 

src/main/java/com/woori/codeshare/room/controller/dto/LiveSessionRequestDTO.java

@@ -0,0 +1,15 @@
+package com.woori.codeshare.room.controller.dto;
+
+import lombok.AllArgsConstructor;
+import lombok.Getter;
+import lombok.NoArgsConstructor;
+
+public class LiveSessionRequestDTO {
+
+    @Getter
+    @NoArgsConstructor
+    @AllArgsConstructor
+    public static class LiveSessionRequest {
+        private String code;
+    }
+}

src/main/java/com/woori/codeshare/room/controller/dto/LiveSessionResponseDTO.java

@@ -0,0 +1,21 @@
+package com.woori.codeshare.room.controller.dto;
+
+import lombok.AllArgsConstructor;
+import lombok.Builder;
+import lombok.Getter;
+import lombok.NoArgsConstructor;
+
+import java.time.LocalDateTime;
+
+public class LiveSessionResponseDTO {
+
+    @Getter
+    @Builder
+    @NoArgsConstructor
+    @AllArgsConstructor
+    public static class LiveSessionResponse {
+        private Long roomId;
+        private String code;
+        private LocalDateTime updatedAt;
+    }
+}

src/main/java/com/woori/codeshare/room/domain/LiveSession.java

@@ -0,0 +1,28 @@
+package com.woori.codeshare.room.domain;
+
+import com.woori.codeshare.global.config.BaseDateTimeEntity;
+import jakarta.persistence.*;
+import lombok.Data;
+import lombok.NoArgsConstructor;
+
+@Entity
+@Data
+@NoArgsConstructor
+public class LiveSession extends BaseDateTimeEntity {
+
+    @Id
+    @GeneratedValue(strategy = GenerationType.IDENTITY)
+    private Long id;
+
+    @OneToOne
+    @JoinColumn(name = "room_id", nullable = false)
+    private Room room;
+
+    @Lob
+    private String code;
+
+    public LiveSession(Room room) {
+        this.room = room;
+        this.code = "";
+    }
+}

src/main/java/com/woori/codeshare/room/exception/RoomErrorCode.java

@@ -12,7 +12,8 @@ public enum RoomErrorCode implements BaseErrorCode {
 
     DUPLICATE_ROOM_TITLE(HttpStatus.BAD_REQUEST, "ROOM400", "이미 동일한 이름의 방이 존재합니다."),
     INVALID_PASSWORD(HttpStatus.FORBIDDEN, "ROOM403", "방 비밀번호가 잘못 되었습니다."),
-    ROOM_NOT_FOUND(HttpStatus.NOT_FOUND, "ROOM404", "존재하지 않는 방입니다.");
+    ROOM_NOT_FOUND(HttpStatus.NOT_FOUND, "ROOM404", "존재하지 않는 방입니다."),
+    LIVE_SESSION_NOT_FOUND(HttpStatus.NOT_FOUND, "LIVE_SESSION404", "존재하지 않는 Live Session id 값입니다.");
 
     private final HttpStatus status;
     private final String code;

src/main/java/com/woori/codeshare/room/repository/LiveSessionRepository.java

@@ -0,0 +1,12 @@
+package com.woori.codeshare.room.repository;
+
+import com.woori.codeshare.room.domain.LiveSession;
+import org.springframework.data.jpa.repository.JpaRepository;
+import org.springframework.stereotype.Repository;
+
+import java.util.Optional;
+
+@Repository
+public interface LiveSessionRepository extends JpaRepository<LiveSession, Long> {
+    Optional<LiveSession> findByRoom_RoomId(Long roomId);
+}

src/main/java/com/woori/codeshare/room/service/RoomService.java

@@ -1,12 +1,17 @@
 package com.woori.codeshare.room.service;
 
 
+import com.woori.codeshare.room.controller.dto.LiveSessionRequestDTO;
+import com.woori.codeshare.room.controller.dto.LiveSessionResponseDTO;
 import com.woori.codeshare.room.controller.dto.RoomRequestDTO;
 import com.woori.codeshare.room.controller.dto.RoomResponseDTO;
+import com.woori.codeshare.room.domain.LiveSession;
 import com.woori.codeshare.room.domain.Room;
 import com.woori.codeshare.room.exception.RoomErrorCode;
 import com.woori.codeshare.room.exception.RoomException;
+import com.woori.codeshare.room.repository.LiveSessionRepository;
 import com.woori.codeshare.room.repository.RoomRepository;
+import jakarta.transaction.Transactional;
 import lombok.RequiredArgsConstructor;
 import org.springframework.security.crypto.bcrypt.BCryptPasswordEncoder;
 import org.springframework.stereotype.Service;
@@ -18,6 +23,7 @@
 public class RoomService {
 
     private final RoomRepository roomRepository;
+    private final LiveSessionRepository liveSessionRepository;
     private final BCryptPasswordEncoder passwordEncoder;
 
     /**
@@ -76,5 +82,47 @@ public RoomResponseDTO.RoomEnterResponse enterRoomByUuid(String uuid, String raw
                 .createdAt(room.getCreatedAt())
                 .build();
     }
+
+    /**
+     * 현재 코드 세션 저장
+     */
+    @Transactional
+    public LiveSessionResponseDTO.LiveSessionResponse saveLiveSession(Long roomId, LiveSessionRequestDTO.LiveSessionRequest request) {
+        Room room = roomRepository.findById(roomId)
+                .orElseThrow(() -> new RoomException(RoomErrorCode.ROOM_NOT_FOUND));
+
+        // 기존 Live Session이 존재하면 업데이트, 없으면 새로 생성
+        LiveSession liveSession = liveSessionRepository.findByRoom_RoomId(roomId)
+                .orElse(new LiveSession(room));
+
+        liveSession.setCode(request.getCode());
+        liveSessionRepository.save(liveSession);
+
+
+        return LiveSessionResponseDTO.LiveSessionResponse.builder()
+                .roomId(roomId)
+                .code(liveSession.getCode())
+                .updatedAt(liveSession.getUpdatedAt())
+                .build();
+    }
+
+    /**
+     * 현재 코드 세션 조회
+     */
+    @Transactional()
+    public LiveSessionResponseDTO.LiveSessionResponse getLiveSession(Long roomId) {
+        Room room = roomRepository.findById(roomId)
+                .orElseThrow(() -> new RoomException(RoomErrorCode.ROOM_NOT_FOUND));
+
+        LiveSession liveSession = liveSessionRepository.findByRoom_RoomId(roomId)
+                .orElseThrow(() -> new RoomException(RoomErrorCode.LIVE_SESSION_NOT_FOUND));
+
+        return LiveSessionResponseDTO.LiveSessionResponse.builder()
+                .roomId(roomId)
+                .code(liveSession.getCode())
+                .updatedAt(liveSession.getUpdatedAt())
+                .build();
+    }
+
 }