feat/notification-delete-1: /id 로 알림 삭제 엔드포인트를 만들자 (#180)

* fix/community-1: 게시글 조회 응답 DTO에 댓글 갯수를 표시한다.
- 단일 게시글 조회 시 / 게시글 그룹별 조회 시 댓글 갯수는 응답 DTO에 포함된다.

* fix/community-2: 댓글 조회시 본인이 종속되어 있는 게시글의 정보가 응답 DTO에 포함된다.
- 8/10 이후에 응답 DTO 초기값 정할 지 여부 결정 예정

* fix/member-1: 회원정보 각각의 필드값에 따른 수정을 가능하게 하자

- Set형태였던 hobbies, languages들을 null 값이 아닐 때에만 수정이 들어가며 null일 때에는 기존 값들이 들어가도록 함
- 기존의 /id API로 들어갔던 수정 메서드를 토큰 인증을 이용한 API로 수정함

* feat/notification-delete-1: /id 로 알림 삭제 엔드포인트를 만들자

- NotificationController, NotificationService:
- 알림 "읽었음"의 처리는 알림 "삭제" 와 동일함
- 따라서 좋아요 취소 때와 동일하게 @Deletemapping으로 구현

- 알림을 갖고 있는 회원과 삭제하려는 회원이 동일해야 하며 위배 시 401 에러를 발생시킴
- 이때 검사는 Notification이 종속되어 있는 NotificationToken 레포지토리에서 진행함
- 삭제 자격 통과 시 ID 값을 비교한 후 삭제 진행

* feat/notification-delete-2: JWT 로그인 실패는 JWT Filter에서 처리해주고 있으므로 외의 모든 에러는 403 에러를 내뱉게 수정한다.

src/main/java/com/dife/api/GlobalExceptionHandler.java

@@ -16,7 +16,7 @@ public class GlobalExceptionHandler extends ResponseEntityExceptionHandler {
 
 	@ExceptionHandler(MemberException.class)
 	public ResponseEntity<ExceptionResonse> handleMemberException(MemberException exception) {
-		return ResponseEntity.status(UNAUTHORIZED.value())
+		return ResponseEntity.status(FORBIDDEN.value())
 				.body(new ExceptionResonse(false, exception.getMessage()));
 	}
 
@@ -29,7 +29,7 @@ public ResponseEntity<ExceptionResonse> handleDuplicateException(DuplicateExcept
 	@ExceptionHandler(BadCredentialsException.class)
 	public ResponseEntity<ExceptionResonse> handleBadCredentialsException(
 			BadCredentialsException exception) {
-		return ResponseEntity.status(UNAUTHORIZED.value())
+		return ResponseEntity.status(FORBIDDEN.value())
 				.body(new ExceptionResonse(false, exception.getMessage()));
 	}
 
@@ -48,14 +48,14 @@ public ResponseEntity<ExceptionResonse> handleRegisterException(RegisterExceptio
 	@ExceptionHandler(IllegalArgumentException.class)
 	public ResponseEntity<ExceptionResonse> handleIllegalArgumentException(
 			IllegalArgumentException exception) {
-		return ResponseEntity.status(UNAUTHORIZED.value())
+		return ResponseEntity.status(FORBIDDEN.value())
 				.body(new ExceptionResonse(false, exception.getMessage()));
 	}
 
 	@ExceptionHandler(MemberNullException.class)
 	public ResponseEntity<ExceptionResonse> handleNullPointerException(
 			NullPointerException exception) {
-		return ResponseEntity.status(UNAUTHORIZED.value())
+		return ResponseEntity.status(FORBIDDEN.value())
 				.body(new ExceptionResonse(false, exception.getMessage()));
 	}
 
@@ -69,7 +69,7 @@ public ResponseEntity<ExceptionResonse> handleConnectException(
 	@ExceptionHandler(PostNotFoundException.class)
 	public ResponseEntity<ExceptionResonse> handlePostNotFoundException(
 			PostNotFoundException exception) {
-		return ResponseEntity.status(UNAUTHORIZED.value())
+		return ResponseEntity.status(FORBIDDEN.value())
 				.body(new ExceptionResonse(false, exception.getMessage()));
 	}
 
@@ -83,7 +83,7 @@ public ResponseEntity<ExceptionResonse> handleConnectException(
 	@ExceptionHandler(ConnectUnauthorizedException.class)
 	public ResponseEntity<ExceptionResonse> handleConnectException(
 			ConnectUnauthorizedException exception) {
-		return ResponseEntity.status(UNAUTHORIZED)
+		return ResponseEntity.status(FORBIDDEN)
 				.body(new ExceptionResonse(false, exception.getMessage()));
 	}
 
@@ -120,4 +120,10 @@ public ResponseEntity<ExceptionResonse> handleChatroomNotFoundException(
 		return ResponseEntity.status(BAD_REQUEST)
 				.body(new ExceptionResonse(false, exception.getMessage()));
 	}
+
+	@ExceptionHandler(RuntimeException.class)
+	public ResponseEntity<ExceptionResonse> handleRuntimeException(RuntimeException exception) {
+		return ResponseEntity.status(FORBIDDEN.value())
+				.body(new ExceptionResonse(false, exception.getMessage()));
+	}
 }

src/main/java/com/dife/api/controller/NotificationController.java

@@ -1,6 +1,7 @@
 package com.dife.api.controller;
 
 import static org.springframework.http.HttpStatus.CREATED;
+import static org.springframework.http.HttpStatus.OK;
 
 import com.dife.api.model.dto.NotificationResponseDto;
 import com.dife.api.model.dto.NotificationTokenRequestDto;
@@ -34,6 +35,12 @@ public ResponseEntity<List<NotificationResponseDto>> getNotifications(Authentica
 		return ResponseEntity.ok(responseDtos);
 	}
 
+	@DeleteMapping("/{id}")
+	public ResponseEntity<Void> deleteNotification(@PathVariable("id") Long id, Authentication auth) {
+		notificationService.deleteNotification(id, auth.getName());
+		return new ResponseEntity<>(OK);
+	}
+
 	@PostMapping("/push")
 	public ResponseEntity<NotificationTokenResponseDto> createNotificationToken(
 			@RequestBody NotificationTokenRequestDto requestDto, Authentication auth) {

src/main/java/com/dife/api/exception/NotificationAuthorizationException.java

@@ -0,0 +1,8 @@
+package com.dife.api.exception;
+
+public class NotificationAuthorizationException extends RuntimeException {
+
+	public NotificationAuthorizationException() {
+		super("알림 편집 자격이 없습니다!");
+	}
+}

src/main/java/com/dife/api/repository/NotificationRepository.java

@@ -0,0 +1,12 @@
+package com.dife.api.repository;
+
+import com.dife.api.model.Notification;
+import com.dife.api.model.NotificationToken;
+import org.springframework.data.jpa.repository.JpaRepository;
+import org.springframework.stereotype.Repository;
+
+@Repository
+public interface NotificationRepository extends JpaRepository<Notification, Long> {
+
+	boolean existsByNotificationToken(NotificationToken notificationToken);
+}

src/main/java/com/dife/api/service/NotificationService.java

@@ -3,6 +3,7 @@
 import static java.util.stream.Collectors.toList;
 
 import com.dife.api.exception.MemberNotFoundException;
+import com.dife.api.exception.NotificationAuthorizationException;
 import com.dife.api.exception.NotificationException;
 import com.dife.api.model.Member;
 import com.dife.api.model.Notification;
@@ -12,6 +13,7 @@
 import com.dife.api.model.dto.NotificationTokenRequestDto;
 import com.dife.api.model.dto.NotificationTokenResponseDto;
 import com.dife.api.repository.MemberRepository;
+import com.dife.api.repository.NotificationRepository;
 import com.dife.api.repository.NotificationTokenRepository;
 import java.util.HashMap;
 import java.util.List;
@@ -35,6 +37,7 @@ public class NotificationService {
 
 	private final MemberRepository memberRepository;
 	private final NotificationTokenRepository notificationTokenRepository;
+	private final NotificationRepository notificationRepository;
 
 	public NotificationTokenResponseDto sendNotificationToken(
 			String memberEmail, NotificationTokenRequestDto requestDto) {
@@ -113,4 +116,22 @@ public void addNotifications(
 			}
 		}
 	}
+
+	public void deleteNotification(Long id, String memberEmail) {
+		Member member =
+				memberRepository.findByEmail(memberEmail).orElseThrow(MemberNotFoundException::new);
+		List<NotificationToken> notifications = notificationTokenRepository.findAllByMember(member);
+
+		for (NotificationToken notificationToken : notifications) {
+			if (!notificationRepository.existsByNotificationToken(notificationToken))
+				throw new NotificationAuthorizationException();
+			for (Notification notification : notificationToken.getNotifications()) {
+				if (Objects.equals(notification.getId(), id)) {
+					notificationToken.getNotifications().remove(notification);
+					notificationRepository.delete(notification);
+					break;
+				}
+			}
+		}
+	}
 }