feat: Lecture 강의 상세조회 수정

강의 상세조회시 유저정보를 확인해 수강중인지 여부를 추가로 전달

backend/src/main/java/com/edufocus/edufocus/lecture/controller/LectureController.java

@@ -67,13 +67,21 @@ public class LectureController {
     }
 
     @GetMapping("/{lectureId}")
-    public ResponseEntity<?> findById(@PathVariable long lectureId) {
-        LectureDetailResponse lectureDetailResponse = lectureService.findLectureById(lectureId);
+    public ResponseEntity<?> findById(@RequestHeader(value = "Authorization", required = false) String accessToken, @PathVariable long lectureId) {
+        Long userId = null;
+
+        if (accessToken != null) {
+            userId = Long.parseLong(jwtUtil.getUserId(accessToken));
+        }
+
+        LectureDetailResponse lectureDetailResponse = lectureService.findLectureById(userId, lectureId);
 
         if (lectureDetailResponse == null) {
             return new ResponseEntity<>(HttpStatus.NO_CONTENT);
         }
 
+
+
         return new ResponseEntity<>(lectureDetailResponse, HttpStatus.OK);
     }
 

backend/src/main/java/com/edufocus/edufocus/lecture/entity/LectureDetailResponse.java

@@ -30,4 +30,6 @@ public class LectureDetailResponse {
     private String plan;
 
     private boolean online;
+
+    private String status;
 }

backend/src/main/java/com/edufocus/edufocus/lecture/entity/UserStatus.java

@@ -0,0 +1,9 @@
+package com.edufocus.edufocus.lecture.entity;
+
+public enum UserStatus {
+    MANAGED_BY_ME,           // 내가 관리하는 강의 - 강사
+    MANAGED_BY_OTHERS,       // 내가 관리하지 않은 강의 - 강사
+    ENROLLED,                // 내가 수강 중인 강의 - 학생
+    PENDING,                 // 내가 수강신청하고 승인 대기 중인 강의 - 학생
+    NOT_ENROLLED             // 내가 수강신청하지 않은 강의 - 학생/비로그인
+}

backend/src/main/java/com/edufocus/edufocus/lecture/service/LectureService.java

@@ -19,7 +19,7 @@ public interface LectureService {
 
     List<LectureSearchResponse> findAllLecture();
 
-    LectureDetailResponse findLectureById(long lectureId);
+    LectureDetailResponse findLectureById(Long userId, long lectureId);
 
     List<LectureSearchResponse> findMyLecture(long userId);
 

backend/src/main/java/com/edufocus/edufocus/lecture/service/LectureServiceImpl.java

@@ -1,11 +1,9 @@
 package com.edufocus.edufocus.lecture.service;
 
-import com.edufocus.edufocus.lecture.entity.Lecture;
-import com.edufocus.edufocus.lecture.entity.LectureCreateRequest;
-import com.edufocus.edufocus.lecture.entity.LectureSearchResponse;
-import com.edufocus.edufocus.lecture.entity.LectureDetailResponse;
+import com.edufocus.edufocus.lecture.entity.*;
 import com.edufocus.edufocus.lecture.repository.LectureRepository;
 import com.edufocus.edufocus.registration.entity.Registration;
+import com.edufocus.edufocus.registration.entity.RegistrationStatus;
 import com.edufocus.edufocus.registration.repository.RegistrationRepository;
 import com.edufocus.edufocus.user.model.entity.User;
 import com.edufocus.edufocus.user.model.entity.UserRole;
@@ -110,14 +108,38 @@ public class LectureServiceImpl implements LectureService {
     }
 
     @Override
-    public LectureDetailResponse findLectureById(long lectureId) {
-
+    public LectureDetailResponse findLectureById(Long userId, long lectureId) {
         Lecture lecture = lectureRepository.findById(lectureId).get();
 
         if (lecture == null) {
             return null;
         }
 
+        String userStatus;
+        if (userId == null) {
+            userStatus = String.valueOf(UserStatus.NOT_ENROLLED);
+        } else {
+            User user = userRepository.findById(userId).get();
+
+            if (user.getRole() == UserRole.ADMIN) {
+                if (lecture.getUser().getId() == user.getId()) {
+                    userStatus = String.valueOf(UserStatus.MANAGED_BY_ME);
+                } else{
+                    userStatus = String.valueOf(UserStatus.MANAGED_BY_OTHERS);
+                }
+            } else {
+                Registration registration = registrationRepository.findByUserIdAndLectureId(userId, lectureId);
+
+                if (registration == null) {
+                    userStatus = String.valueOf(UserStatus.NOT_ENROLLED);
+                } else if (registration.getStatus() == RegistrationStatus.ACCEPTED) {
+                    userStatus = String.valueOf(UserStatus.ENROLLED);
+                } else {
+                    userStatus = String.valueOf(UserStatus.PENDING);
+                }
+            }
+        }
+
         LectureDetailResponse lectureDetailResponse = new LectureDetailResponse().builder()
                 .id(lecture.getId())
                 .title(lecture.getTitle())
@@ -128,6 +150,7 @@ public class LectureServiceImpl implements LectureService {
                 .plan(lecture.getPlan())
                 .online(lecture.isOnline())
                 .teacherName(lecture.getUser().getName())
+                .status(userStatus)
                 .build();
 
         return lectureDetailResponse;

backend/src/main/java/com/edufocus/edufocus/registration/repository/RegistrationRepository.java

@@ -10,4 +10,6 @@ import java.util.List;
 @Repository
 public interface RegistrationRepository extends JpaRepository<Registration, Long> {
     List<Registration> findAllByUserId(@Param("userId") Long userId);
+
+    Registration findByUserIdAndLectureId(Long userId, Long lectureId);
 }