feat: Registration 강의별 수강신청 현황 조회 추가

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

@@ -28,4 +28,6 @@ public interface LectureService {
     Lecture findLectureByTitle(String title);
 
     void changeState(Long lectureId);
+
+    boolean checkTeacher(Long userId, Long lectureId);
 }

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

@@ -223,8 +223,7 @@ public class LectureServiceImpl implements LectureService {
         Optional<Lecture> lecture = lectureRepository.findById(id);
 
         Lecture l;
-        if(lecture.isPresent())
+        if (lecture.isPresent()) {
-        {
             l = lecture.get();
 
             System.out.println(l.isOnline());
@@ -232,12 +231,18 @@ public class LectureServiceImpl implements LectureService {
             System.out.println(l.isOnline());
 
 
-        }else {
+        } else {
 
             throw new RuntimeException("Lecture not found with id: " + id);
         }
         lectureRepository.save(l);
     }
 
+    @Override
+    public boolean checkTeacher(Long userId, Long lectureId) {
+        Optional<Lecture> lecture = lectureRepository.findById(lectureId);
+
+        return lecture.isPresent() && lecture.get().getUser().getId() == userId;
+    }
 
 }

backend/src/main/java/com/edufocus/edufocus/registration/controller/RegistrationController.java

@@ -1,5 +1,6 @@
 package com.edufocus.edufocus.registration.controller;
 
+import com.edufocus.edufocus.lecture.service.LectureService;
 import com.edufocus.edufocus.registration.service.RegistrationService;
 import com.edufocus.edufocus.user.util.JWTUtil;
 import lombok.RequiredArgsConstructor;
@@ -16,7 +17,9 @@ import java.util.Map;
 @RequiredArgsConstructor
 public class RegistrationController {
 
-    private final RegistrationService registrationServiceImpl;
+    private final RegistrationService registrationService;
+
+    private final LectureService lectureService;
 
     private final JWTUtil jwtUtil;
 
@@ -25,7 +28,7 @@ public class RegistrationController {
         Long userId = Long.parseLong(jwtUtil.getUserId(accessToken));
         Long lectureId = map.get("lectureId");
 
-        if (!registrationServiceImpl.createRegistration(userId, lectureId)) {
+        if (!registrationService.createRegistration(userId, lectureId)) {
             return new ResponseEntity<>(HttpStatus.CONFLICT);
         }
 
@@ -36,12 +39,10 @@ public class RegistrationController {
     public ResponseEntity<?> acceptRigistration(@RequestHeader("Authorization") String accessToken, @PathVariable long registrationId) {
         Long userId = Long.parseLong(jwtUtil.getUserId(accessToken));
 
-        if (!registrationServiceImpl.acceptRegistration(userId, registrationId)) {
+        if (!registrationService.acceptRegistration(userId, registrationId)) {
-            String msg = new String("Not Acceptable");
+            return new ResponseEntity<>(HttpStatus.NOT_FOUND);
-            return new ResponseEntity<>(HttpStatus.UNAUTHORIZED);
         }
 
-        String msg = new String("registration accepted");
         return new ResponseEntity<>(HttpStatus.OK);
     }
 
@@ -49,12 +50,22 @@ public class RegistrationController {
     public ResponseEntity<?> deleteRigistration(@RequestHeader("Authorization") String accessToken, @PathVariable long registrationId) {
         Long userId = Long.parseLong(jwtUtil.getUserId(accessToken));
 
-        if (!registrationServiceImpl.deleteRegistration(userId, registrationId)) {
+        if (!registrationService.deleteRegistration(userId, registrationId)) {
-            String msg = new String("Not Acceptable");
+            return new ResponseEntity<>(HttpStatus.NOT_FOUND);
-            return new ResponseEntity<>(HttpStatus.UNAUTHORIZED);
         }
 
         return new ResponseEntity<>(HttpStatus.NO_CONTENT);
     }
 
+    @GetMapping("/{lectureId}")
+    public ResponseEntity<?> getRegistrations(@RequestHeader("Authorization") String accessToken, @PathVariable long lectureId) {
+        Long userId = Long.parseLong(jwtUtil.getUserId(accessToken));
+
+        if (!lectureService.checkTeacher(userId, lectureId)) {
+            return new ResponseEntity<>(HttpStatus.NOT_FOUND);
+        }
+
+        return new ResponseEntity<>(registrationService.searchRegistrations(lectureId), HttpStatus.OK);
+    }
+
 }

backend/src/main/java/com/edufocus/edufocus/registration/entity/Registration.java

@@ -26,5 +26,5 @@ public class Registration {
     private Lecture lecture;
 
     @Enumerated(EnumType.STRING)
-    private RegistrationStatus status ;
+    private RegistrationStatus status;
 }

backend/src/main/java/com/edufocus/edufocus/registration/entity/RegistrationSearchResponse.java

@@ -0,0 +1,18 @@
+package com.edufocus.edufocus.registration.entity;
+
+import com.edufocus.edufocus.lecture.entity.Lecture;
+import lombok.AllArgsConstructor;
+import lombok.Builder;
+import lombok.Getter;
+import lombok.NoArgsConstructor;
+
+@Getter
+@Builder
+@NoArgsConstructor
+@AllArgsConstructor
+public class RegistrationSearchResponse {
+
+    private Long id;
+
+    private String userName;
+}

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

@@ -2,6 +2,7 @@ package com.edufocus.edufocus.registration.repository;
 
 import com.edufocus.edufocus.registration.entity.Registration;
 import org.springframework.data.jpa.repository.JpaRepository;
+import org.springframework.data.jpa.repository.Query;
 import org.springframework.data.repository.query.Param;
 import org.springframework.stereotype.Repository;
 
@@ -11,5 +12,7 @@ import java.util.List;
 public interface RegistrationRepository extends JpaRepository<Registration, Long> {
     List<Registration> findAllByUserId(@Param("userId") Long userId);
 
+    List<Registration> findAllNotAcceptedByLectureId(@Param("lectureId") Long lectureId);
+
     Registration findByUserIdAndLectureId(Long userId, Long lectureId);
 }

backend/src/main/java/com/edufocus/edufocus/registration/service/RegistrationService.java

@@ -1,17 +1,22 @@
 package com.edufocus.edufocus.registration.service;
 
 import com.edufocus.edufocus.registration.entity.Registration;
+import com.edufocus.edufocus.registration.entity.RegistrationSearchResponse;
 import com.edufocus.edufocus.registration.entity.RegistrationStatus;
 import org.springframework.stereotype.Service;
 
+import java.util.List;
+
 @Service
 public interface RegistrationService {
 
-    boolean createRegistration(long userId, long registrationId);
+    boolean createRegistration(Long userId, Long registrationId);
 
-    boolean acceptRegistration(long userId, long RegistrationId);
+    boolean acceptRegistration(Long userId, Long RegistrationId);
 
-    boolean deleteRegistration(long userId, long registrationId);
+    boolean deleteRegistration(Long userId, Long registrationId);
 
-    RegistrationStatus isOnline(Long userId , Long lectureId);
+    List<RegistrationSearchResponse> searchRegistrations(Long LectureId);
+
+    RegistrationStatus isOnline(Long userId, Long lectureId);
 }

backend/src/main/java/com/edufocus/edufocus/registration/service/RegistrationServiceImpl.java

@@ -1,14 +1,20 @@
 package com.edufocus.edufocus.registration.service;
 
+import com.edufocus.edufocus.lecture.entity.Lecture;
 import com.edufocus.edufocus.lecture.repository.LectureRepository;
 import com.edufocus.edufocus.registration.entity.Registration;
+import com.edufocus.edufocus.registration.entity.RegistrationSearchResponse;
 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;
 import com.edufocus.edufocus.user.model.repository.UserRepository;
 import jakarta.transaction.Transactional;
 import lombok.RequiredArgsConstructor;
 import org.springframework.stereotype.Service;
 
+import java.util.ArrayList;
+import java.util.List;
 import java.util.Optional;
 
 @Service
@@ -21,14 +27,16 @@ public class RegistrationServiceImpl implements RegistrationService {
     private final LectureRepository lectureRepository;
 
     @Override
-    public boolean createRegistration(long userId, long lectureId) {
+    public boolean createRegistration(Long userId, Long lectureId) {
-        if (registrationRepository.findByUserIdAndLectureId(userId, lectureId) != null) {
+        Optional<User> user = userRepository.findById(userId);
+
+        if (user.isEmpty() || user.get().getRole().equals(UserRole.ADMIN)) {
             return false;
         }
 
         Registration registration = new Registration().builder()
-                .user(userRepository.getReferenceById(userId))
+                .user(userRepository.findById(userId).get())
-                .lecture(lectureRepository.getReferenceById(lectureId))
+                .lecture(lectureRepository.findById(lectureId).get())
                 .status(RegistrationStatus.WAITING)
                 .build();
 
@@ -37,24 +45,24 @@ public class RegistrationServiceImpl implements RegistrationService {
     }
 
     @Override
-    public boolean acceptRegistration(long userId, long registrationId) {
+    public boolean acceptRegistration(Long userId, Long registrationId) {
-        Registration registration = registrationRepository.findById(registrationId).get();
+        Optional<Registration> registration = registrationRepository.findById(registrationId);
 
-        if (registration.getLecture().getUser().getId() != userId) {
+        if (registration.isEmpty() || registration.get().getLecture().getUser().getId() != userId) {
             return false;
         }
 
-        registration.setStatus(RegistrationStatus.valueOf("ACCEPTED"));
+        registration.get().setStatus(RegistrationStatus.valueOf("ACCEPTED"));
-        registrationRepository.save(registration);
+        registrationRepository.save(registration.get());
 
         return true;
     }
 
     @Override
-    public boolean deleteRegistration(long userId, long registrationId) {
+    public boolean deleteRegistration(Long userId, Long registrationId) {
-        Registration registration = registrationRepository.findById(registrationId).get();
+        Optional<Registration> registration = registrationRepository.findById(registrationId);
 
-        if (registration.getLecture().getUser().getId() != userId) {
+        if (registration.isEmpty() || registration.get().getLecture().getUser().getId() != userId) {
             return false;
         }
 
@@ -62,10 +70,27 @@ public class RegistrationServiceImpl implements RegistrationService {
         return true;
     }
 
+    @Override
+    public List<RegistrationSearchResponse> searchRegistrations(Long lectureId) {
+        List<Registration> registrations = registrationRepository.findAllNotAcceptedByLectureId(lectureId);
+
+        List<RegistrationSearchResponse> responses = new ArrayList<>();
+        for (Registration registration : registrations) {
+            RegistrationSearchResponse response = new RegistrationSearchResponse().builder()
+                    .id(registration.getId())
+                    .userName(registration.getUser().getName())
+                    .build();
+
+            responses.add(response);
+        }
+
+        return responses;
+    }
+
     @Override
     public RegistrationStatus isOnline(Long userId, Long lectureId) {
 
-        Registration registration = registrationRepository.findByUserIdAndLectureId(userId,lectureId);
+        Registration registration = registrationRepository.findByUserIdAndLectureId(userId, lectureId);
         return registration.getStatus();
     }