최신 알림 존재 여부 및 읽기 기능 구현

backend/src/main/java/com/votogether/domain/alarm/entity/Alarm.java

@@ -15,6 +15,7 @@
 import jakarta.persistence.Id;
 import jakarta.persistence.JoinColumn;
 import jakarta.persistence.ManyToOne;
+import java.time.LocalDateTime;
 import java.util.Objects;
 import lombok.AccessLevel;
 import lombok.Builder;
@@ -74,4 +75,11 @@ public void checkOwner(final Member member) {
         }
     }
 
+    public LocalDateTime getLatestAlarmCreatedAt(final LocalDateTime reportActionAlarmCreatedAt) {
+        if (this.getCreatedAt().isAfter(reportActionAlarmCreatedAt)) {
+            return this.getCreatedAt();
+        }
+        return reportActionAlarmCreatedAt;
+    }
+
 }

backend/src/main/java/com/votogether/domain/alarm/exception/AlarmExceptionType.java

@@ -6,7 +6,7 @@
 @Getter
 public enum AlarmExceptionType implements ExceptionType {
 
-    NOT_FOUND_ACTION(1300, "신고조치알림이 존재하지 않습니다."),
+    NOT_FOUND_ACTION(1300, "신고 조치 알림이 존재하지 않습니다."),
     NOT_FOUND(1301, "알림이 존재하지 않습니다."),
     NOT_OWNER(1302, "알림을 읽을 대상이 아닙니다."),
     NOT_FOUND_ACTION_TYPE(1303, "등록되지 않은 알림 동작입니다."),

backend/src/main/java/com/votogether/domain/alarm/repository/AlarmRepository.java

@@ -3,6 +3,7 @@
 import com.votogether.domain.alarm.entity.Alarm;
 import com.votogether.domain.member.entity.Member;
 import java.util.List;
+import java.util.Optional;
 import org.springframework.data.domain.Pageable;
 import org.springframework.data.domain.Slice;
 import org.springframework.data.jpa.repository.JpaRepository;
@@ -13,4 +14,6 @@ public interface AlarmRepository extends JpaRepository<Alarm, Long> {
 
     List<Alarm> findAllByMember(final Member member);
 
+    Optional<Alarm> findByMemberOrderByIdDesc(final Member member);
+
 }

backend/src/main/java/com/votogether/domain/alarm/repository/ReportActionAlarmRepository.java

@@ -13,4 +13,6 @@ public interface ReportActionAlarmRepository extends JpaRepository<ReportActionA
 
     Optional<ReportActionAlarm> findByIdAndMember(final Long Id, final Member member);
 
+    Optional<ReportActionAlarm> findByMemberOrderByIdDesc(final Member member);
+
 }

backend/src/main/java/com/votogether/domain/member/controller/MemberController.java

@@ -46,6 +46,12 @@ public ResponseEntity<Void> updateDetails(
         return ResponseEntity.ok().build();
     }
 
+    @PatchMapping("/me/check-alarm")
+    public ResponseEntity<Void> checkLatestAlarm(@Auth final Member member) {
+        memberService.checkLatestAlarm(member);
+        return ResponseEntity.ok().build();
+    }
+
     @DeleteMapping("/me/delete")
     public ResponseEntity<Void> deleteMember(@Auth final Member member) {
         memberService.deleteMember(member);

backend/src/main/java/com/votogether/domain/member/controller/MemberControllerDocs.java

@@ -5,6 +5,7 @@
 import com.votogether.domain.member.dto.response.MemberInfoResponse;
 import com.votogether.domain.member.entity.Member;
 import com.votogether.global.exception.ExceptionResponse;
+import com.votogether.global.jwt.Auth;
 import io.swagger.v3.oas.annotations.Operation;
 import io.swagger.v3.oas.annotations.media.Content;
 import io.swagger.v3.oas.annotations.media.Schema;
@@ -17,7 +18,14 @@
 public interface MemberControllerDocs {
 
     @Operation(summary = "회원 정보 조회", description = "회원 정보를 조회한다.")
-    @ApiResponse(responseCode = "200", description = "회원 정보 조회 성공")
+    @ApiResponses({
+            @ApiResponse(responseCode = "200", description = "회원 정보 조회 성공"),
+            @ApiResponse(
+                    responseCode = "400",
+                    description = "회원에 해당하는 통계 정보가 없는 경우",
+                    content = @Content(schema = @Schema(implementation = ExceptionResponse.class))
+            )
+    })
     ResponseEntity<MemberInfoResponse> findMemberInfo(final Member member);
 
     @Operation(summary = "회원 닉네임 변경", description = "회원 닉네임을 변경한다.")
@@ -48,6 +56,10 @@ ResponseEntity<Void> updateDetails(
             final Member member
     );
 
+    @Operation(summary = "회원 최신 알림 확인", description = "회원의 최신 알림 읽은 시간을 수정한다.")
+    @ApiResponse(responseCode = "200", description = "최신 알림 읽기 성공")
+    ResponseEntity<Void> checkLatestAlarm(@Auth final Member member);
+
     @Operation(summary = "회원 탈퇴", description = "회원 탈퇴한다.")
     @ApiResponse(responseCode = "200", description = "회원 탈퇴 성공")
     ResponseEntity<Void> deleteMember(final Member member);

backend/src/main/java/com/votogether/domain/member/dto/response/MemberInfoResponse.java

@@ -15,13 +15,16 @@ public record MemberInfoResponse(
         @Schema(description = "출생년도", example = "2002")
         Integer birthYear,
 
-        @Schema(description = "권한", example = "MEMBER")
-        Roles roles,
-
         @Schema(description = "작성한 게시글 수", example = "5")
         long postCount,
 
         @Schema(description = "투표한 수", example = "10")
-        long voteCount
+        long voteCount,
+
+        @Schema(description = "권한", example = "MEMBER")
+        Roles roles,
+
+        @Schema(description = "최신 알림 존재 여부", example = "false")
+        boolean hasLatestAlarm
 ) {
 }

backend/src/main/java/com/votogether/domain/member/entity/Member.java

@@ -56,24 +56,29 @@ public class Member extends BaseEntity {
     private String socialId;
 
     @Enumerated(EnumType.STRING)
-    @Column(nullable = false, length = 20)
+    @Column(length = 20, nullable = false)
     private Roles roles;
 
+    @Column(columnDefinition = "datetime(6)", nullable = false)
+    private LocalDateTime alarmCheckedAt;
+
     @Builder
     private Member(
             final String nickname,
             final Gender gender,
             final Integer birthYear,
             final SocialType socialType,
             final String socialId,
-            final Roles roles
+            final Roles roles,
+            final LocalDateTime alarmCheckedAt
     ) {
         this.nickname = new Nickname(nickname);
         this.gender = gender;
         this.birthYear = birthYear;
         this.socialType = socialType;
         this.socialId = socialId;
         this.roles = roles;
+        this.alarmCheckedAt = alarmCheckedAt;
     }
 
     public static Member from(final KakaoMemberResponse response) {
@@ -82,6 +87,7 @@ public static Member from(final KakaoMemberResponse response) {
                 .socialType(SocialType.KAKAO)
                 .socialId(String.valueOf(response.id()))
                 .roles(Roles.MEMBER)
+                .alarmCheckedAt(LocalDateTime.now())
                 .build();
     }
 
@@ -117,6 +123,14 @@ public boolean hasEssentialInfo() {
         return (this.gender != null && this.birthYear != null);
     }
 
+    public boolean hasLatestAlarmCompareTo(final LocalDateTime latestAlarmCreatedAt) {
+        return alarmCheckedAt.isBefore(latestAlarmCreatedAt);
+    }
+
+    public void checkAlarm() {
+        alarmCheckedAt = LocalDateTime.now();
+    }
+
     public String getNickname() {
         return this.nickname.getValue();
     }

backend/src/main/java/com/votogether/domain/member/service/MemberService.java

@@ -1,7 +1,9 @@
 package com.votogether.domain.member.service;
 
 import com.votogether.domain.alarm.entity.Alarm;
+import com.votogether.domain.alarm.entity.ReportActionAlarm;
 import com.votogether.domain.alarm.repository.AlarmRepository;
+import com.votogether.domain.alarm.repository.ReportActionAlarmRepository;
 import com.votogether.domain.member.dto.request.MemberDetailRequest;
 import com.votogether.domain.member.dto.response.MemberInfoResponse;
 import com.votogether.domain.member.entity.Member;
@@ -23,6 +25,7 @@
 import com.votogether.domain.vote.repository.VoteRepository;
 import com.votogether.global.exception.BadRequestException;
 import com.votogether.global.exception.NotFoundException;
+import java.time.LocalDateTime;
 import java.util.List;
 import java.util.Optional;
 import lombok.RequiredArgsConstructor;
@@ -43,6 +46,7 @@ public class MemberService {
     private final ReportRepository reportRepository;
     private final CommentRepository commentRepository;
     private final AlarmRepository alarmRepository;
+    private final ReportActionAlarmRepository reportActionAlarmRepository;
 
     @Transactional
     public Member register(final Member member) {
@@ -73,17 +77,46 @@ public Member findById(final Long memberId) {
     public MemberInfoResponse findMemberInfo(final Member member) {
         final MemberMetric memberMetric = memberMetricRepository.findByMember(member)
                 .orElseThrow(() -> new NotFoundException(MemberExceptionType.NOT_FOUND_METRIC));
+        final boolean hasLatestAlarm = hasLatestAlarm(member);
 
         return new MemberInfoResponse(
                 member.getNickname(),
                 member.getGender(),
                 member.getBirthYear(),
-                member.getRoles(),
                 memberMetric.getPostCount(),
-                memberMetric.getVoteCount()
+                memberMetric.getVoteCount(),
+                member.getRoles(),
+                hasLatestAlarm
         );
     }
 
+    private boolean hasLatestAlarm(final Member member) {
+        final Optional<Alarm> maybeAlarm = alarmRepository.findByMemberOrderByIdDesc(member);
+        final Optional<ReportActionAlarm> maybeReportActionAlarm =
+                reportActionAlarmRepository.findByMemberOrderByIdDesc(member);
+
+        if (maybeAlarm.isEmpty() && maybeReportActionAlarm.isEmpty()) {
+            return false;
+        }
+        final LocalDateTime latestAlarmCreatedAt = getLatestAlarmCreatedAt(maybeAlarm, maybeReportActionAlarm);
+        return member.hasLatestAlarmCompareTo(latestAlarmCreatedAt);
+    }
+
+    private LocalDateTime getLatestAlarmCreatedAt(
+            final Optional<Alarm> maybeAlarm,
+            final Optional<ReportActionAlarm> maybeReportActionAlarm
+    ) {
+        if (maybeAlarm.isEmpty()) {
+            return maybeReportActionAlarm.get().getCreatedAt();
+        }
+        if (maybeReportActionAlarm.isEmpty()) {
+            return maybeAlarm.get().getCreatedAt();
+        }
+        final Alarm alarm = maybeAlarm.get();
+        final ReportActionAlarm reportActionAlarm = maybeReportActionAlarm.get();
+        return alarm.getLatestAlarmCreatedAt(reportActionAlarm.getCreatedAt());
+    }
+
     @Transactional
     public void changeNickname(final Member member, final String nickname) {
         validateExistentNickname(nickname);
@@ -112,6 +145,11 @@ private void validateExistentDetails(final Member member) {
         }
     }
 
+    @Transactional
+    public void checkLatestAlarm(final Member member) {
+        member.checkAlarm();
+    }
+
     @Transactional
     public void deleteMember(final Member member) {
         final List<Post> posts = deletePosts(member);

backend/src/test/java/com/votogether/domain/alarm/entity/AlarmTest.java

@@ -7,6 +7,7 @@
 import com.votogether.domain.member.entity.Member;
 import com.votogether.global.exception.BadRequestException;
 import com.votogether.test.fixtures.MemberFixtures;
+import java.time.LocalDateTime;
 import org.junit.jupiter.api.DisplayName;
 import org.junit.jupiter.api.Test;
 import org.springframework.test.util.ReflectionTestUtils;
@@ -54,4 +55,26 @@ void checkOwner() {
                 .hasMessage("알림을 읽을 대상이 아닙니다.");
     }
 
+    @Test
+    @DisplayName("알림이 생성된 시각과 인자로 받은 시각을 비교하여 최신 시각을 반환한다.")
+    void getLatestAlarmCreatedAt() {
+        // given
+        Member member = MemberFixtures.MALE_30.get();
+        Alarm alarm = Alarm.builder()
+                .member(member)
+                .alarmType(AlarmType.COMMENT)
+                .targetId(1L)
+                .detail("detail")
+                .isChecked(false)
+                .build();
+        ReflectionTestUtils.setField(alarm, "createdAt", LocalDateTime.of(2010, 10, 18, 12, 0));
+        LocalDateTime now = LocalDateTime.now();
+
+        // when
+        LocalDateTime latestAlarmCreatedAt = alarm.getLatestAlarmCreatedAt(now);
+
+        // then
+        assertThat(latestAlarmCreatedAt).isEqualTo(now);
+    }
+
 }

backend/src/test/java/com/votogether/domain/member/controller/MemberControllerTest.java

@@ -55,9 +55,10 @@ void findMemberInfo() throws Exception {
                 "저문",
                 Gender.MALE,
                 1988,
-                Roles.MEMBER,
                 0,
-                0
+                0,
+                Roles.MEMBER,
+                false
         );
 
         given(tokenProcessor.resolveToken(anyString())).willReturn("token");
@@ -219,6 +220,26 @@ void invalidNullOfBirthYear(Integer birthYear) throws Exception {
 
     }
 
+    @Test
+    @DisplayName("최신 알림 읽기에 성공하면 200을 반환한다.")
+    void checkLatestAlarm() throws Exception {
+        // given
+        TokenPayload tokenPayload = new TokenPayload(1L, 1L, 1L);
+        given(tokenProcessor.resolveToken(anyString())).willReturn("token");
+        given(tokenProcessor.parseToken(anyString())).willReturn(tokenPayload);
+        given(memberService.findById(anyLong())).willReturn(MemberFixtures.FEMALE_20.get());
+
+        willDoNothing().given(memberService).checkLatestAlarm(any(Member.class));
+
+        // when, then
+        RestAssuredMockMvc
+                .given().log().all()
+                .headers(HttpHeaders.AUTHORIZATION, "Bearer token")
+                .when().patch("/members/me/check-alarm")
+                .then().log().all()
+                .statusCode(HttpStatus.OK.value());
+    }
+
     @Test
     @DisplayName("회원 탈퇴에 성공하면 204를 반환한다.")
     void deleteMember() throws Exception {