feat: 스터디 공지 생성,수정,삭제 API 추가

src/main/java/com/gdschongik/gdsc/domain/study/api/MentorStudyController.java

@@ -1,15 +1,21 @@
 package com.gdschongik.gdsc.domain.study.api;
 
 import com.gdschongik.gdsc.domain.study.application.MentorStudyService;
+import com.gdschongik.gdsc.domain.study.dto.request.StudyAnnouncementCreateUpdateRequest;
 import com.gdschongik.gdsc.domain.study.dto.response.MentorStudyResponse;
 import com.gdschongik.gdsc.domain.study.dto.response.StudyStudentResponse;
 import io.swagger.v3.oas.annotations.Operation;
 import io.swagger.v3.oas.annotations.tags.Tag;
+import jakarta.validation.Valid;
 import java.util.List;
 import lombok.RequiredArgsConstructor;
 import org.springframework.http.ResponseEntity;
+import org.springframework.web.bind.annotation.DeleteMapping;
 import org.springframework.web.bind.annotation.GetMapping;
 import org.springframework.web.bind.annotation.PathVariable;
+import org.springframework.web.bind.annotation.PostMapping;
+import org.springframework.web.bind.annotation.PutMapping;
+import org.springframework.web.bind.annotation.RequestBody;
 import org.springframework.web.bind.annotation.RequestMapping;
 import org.springframework.web.bind.annotation.RestController;
 
@@ -34,4 +40,27 @@ public ResponseEntity<List<StudyStudentResponse>> getStudyStudents(@PathVariable
         List<StudyStudentResponse> response = mentorStudyService.getStudyStudents(studyId);
         return ResponseEntity.ok(response);
     }
+
+    @Operation(summary = "스터디 공지 생성", description = "스터디의 공지사항을 생성합니다.")
+    @PostMapping("/{studyId}/announcements")
+    public ResponseEntity<Void> createStudyAnnouncement(
+            @PathVariable Long studyId, @Valid @RequestBody StudyAnnouncementCreateUpdateRequest request) {
+        mentorStudyService.createStudyAnnouncement(studyId, request);
+        return ResponseEntity.ok().build();
+    }
+
+    @Operation(summary = "스터디 공지 수정", description = "스터디의 공지사항을 수정합니다.")
+    @PutMapping("/announcements/{studyAnnouncementId}")
+    public ResponseEntity<Void> updateStudyAnnouncement(
+            @PathVariable Long studyAnnouncementId, @Valid @RequestBody StudyAnnouncementCreateUpdateRequest request) {
+        mentorStudyService.updateStudyAnnouncement(studyAnnouncementId, request);
+        return ResponseEntity.ok().build();
+    }
+
+    @Operation(summary = "스터디 공지 삭제", description = "스터디의 공지사항을 삭제합니다.")
+    @DeleteMapping("/announcements/{studyAnnouncementId}")
+    public ResponseEntity<Void> deleteStudyAnnouncement(@PathVariable Long studyAnnouncementId) {
+        mentorStudyService.deleteStudyAnnouncement(studyAnnouncementId);
+        return ResponseEntity.ok().build();
+    }
 }

src/main/java/com/gdschongik/gdsc/domain/study/api/StudentStudyController.java

@@ -1,7 +1,7 @@
 package com.gdschongik.gdsc.domain.study.api;
 
 import com.gdschongik.gdsc.domain.study.application.StudentStudyService;
-import com.gdschongik.gdsc.domain.study.dto.request.StudyAttendRequest;
+import com.gdschongik.gdsc.domain.study.dto.request.StudyAttendCreateRequest;
 import com.gdschongik.gdsc.domain.study.dto.response.StudyResponse;
 import io.swagger.v3.oas.annotations.Operation;
 import io.swagger.v3.oas.annotations.tags.Tag;
@@ -49,7 +49,7 @@ public ResponseEntity<Void> cancelStudyApply(@PathVariable Long studyId) {
     @Operation(summary = "스터디 출석체크", description = "스터디에 출석체크합니다. 현재 진행중인 스터디 회차에 출석체크해야 하며, 중복출석체크할 수 없습니다.")
     @PostMapping("/study-details/{studyDetailId}/attend")
     public ResponseEntity<Void> attend(
-            @PathVariable Long studyDetailId, @Valid @RequestBody StudyAttendRequest request) {
+            @PathVariable Long studyDetailId, @Valid @RequestBody StudyAttendCreateRequest request) {
         studentStudyService.attend(studyDetailId, request);
         return ResponseEntity.ok().build();
     }

src/main/java/com/gdschongik/gdsc/domain/study/application/MentorStudyService.java

@@ -1,27 +1,33 @@
 package com.gdschongik.gdsc.domain.study.application;
 
 import com.gdschongik.gdsc.domain.member.domain.Member;
+import com.gdschongik.gdsc.domain.study.dao.StudyAnnouncementRepository;
 import com.gdschongik.gdsc.domain.study.dao.StudyHistoryRepository;
 import com.gdschongik.gdsc.domain.study.dao.StudyRepository;
 import com.gdschongik.gdsc.domain.study.domain.Study;
+import com.gdschongik.gdsc.domain.study.domain.StudyAnnouncement;
 import com.gdschongik.gdsc.domain.study.domain.StudyHistory;
 import com.gdschongik.gdsc.domain.study.domain.StudyValidator;
+import com.gdschongik.gdsc.domain.study.dto.request.StudyAnnouncementCreateUpdateRequest;
 import com.gdschongik.gdsc.domain.study.dto.response.MentorStudyResponse;
 import com.gdschongik.gdsc.domain.study.dto.response.StudyStudentResponse;
 import com.gdschongik.gdsc.global.exception.CustomException;
 import com.gdschongik.gdsc.global.exception.ErrorCode;
 import com.gdschongik.gdsc.global.util.MemberUtil;
 import java.util.List;
 import lombok.RequiredArgsConstructor;
+import lombok.extern.slf4j.Slf4j;
 import org.springframework.stereotype.Service;
 import org.springframework.transaction.annotation.Transactional;
 
+@Slf4j
 @Service
 @RequiredArgsConstructor
 public class MentorStudyService {
 
     private final MemberUtil memberUtil;
     private final StudyRepository studyRepository;
+    private final StudyAnnouncementRepository studyAnnouncementRepository;
     private final StudyHistoryRepository studyHistoryRepository;
     private final StudyValidator studyValidator;
 
@@ -43,4 +49,45 @@ public List<StudyStudentResponse> getStudyStudents(Long studyId) {
 
         return studyHistories.stream().map(StudyStudentResponse::from).toList();
     }
+
+    @Transactional
+    public void createStudyAnnouncement(Long studyId, StudyAnnouncementCreateUpdateRequest request) {
+        Member currentMember = memberUtil.getCurrentMember();
+        final Study study = studyRepository.getById(studyId);
+
+        studyValidator.validateStudyMentor(currentMember, study);
+
+        StudyAnnouncement studyAnnouncement =
+                StudyAnnouncement.createStudyAnnouncement(study, request.title(), request.link());
+        studyAnnouncementRepository.save(studyAnnouncement);
+
+        log.info("[MentorStudyService] 스터디 공지 생성: studyAnnouncementId={}", studyAnnouncement.getId());
+    }
+
+    @Transactional
+    public void updateStudyAnnouncement(Long studyAnnouncementId, StudyAnnouncementCreateUpdateRequest request) {
+        Member currentMember = memberUtil.getCurrentMember();
+        final StudyAnnouncement studyAnnouncement = studyAnnouncementRepository.getById(studyAnnouncementId);
+        Study study = studyAnnouncement.getStudy();
+
+        studyValidator.validateStudyMentor(currentMember, study);
+
+        studyAnnouncement.update(request.title(), request.link());
+        studyAnnouncementRepository.save(studyAnnouncement);
+
+        log.info("[MentorStudyService] 스터디 공지 수정 완료: studyAnnouncementId={}", studyAnnouncement.getId());
+    }
+
+    @Transactional
+    public void deleteStudyAnnouncement(Long studyAnnouncementId) {
+        Member currentMember = memberUtil.getCurrentMember();
+        final StudyAnnouncement studyAnnouncement = studyAnnouncementRepository.getById(studyAnnouncementId);
+        Study study = studyAnnouncement.getStudy();
+
+        studyValidator.validateStudyMentor(currentMember, study);
+
+        studyAnnouncementRepository.delete(studyAnnouncement);
+
+        log.info("[MentorStudyService] 스터디 공지 삭제 완료: studyAnnouncementId={}", studyAnnouncement.getId());
+    }
 }

src/main/java/com/gdschongik/gdsc/domain/study/application/StudentStudyService.java

@@ -10,7 +10,7 @@
 import com.gdschongik.gdsc.domain.study.domain.*;
 import com.gdschongik.gdsc.domain.study.domain.Attendance;
 import com.gdschongik.gdsc.domain.study.domain.AttendanceValidator;
-import com.gdschongik.gdsc.domain.study.dto.request.StudyAttendRequest;
+import com.gdschongik.gdsc.domain.study.dto.request.StudyAttendCreateRequest;
 import com.gdschongik.gdsc.domain.study.dto.response.StudyResponse;
 import com.gdschongik.gdsc.global.exception.CustomException;
 import com.gdschongik.gdsc.global.util.MemberUtil;
@@ -73,7 +73,7 @@ public void cancelStudyApply(Long studyId) {
     }
 
     @Transactional
-    public void attend(Long studyDetailId, StudyAttendRequest request) {
+    public void attend(Long studyDetailId, StudyAttendCreateRequest request) {
         final StudyDetail studyDetail = studyDetailRepository
                 .findById(studyDetailId)
                 .orElseThrow(() -> new CustomException(STUDY_DETAIL_NOT_FOUND));

src/main/java/com/gdschongik/gdsc/domain/study/dao/StudyAnnouncementRepository.java

@@ -0,0 +1,14 @@
+package com.gdschongik.gdsc.domain.study.dao;
+
+import static com.gdschongik.gdsc.global.exception.ErrorCode.STUDY_ANNOUNCEMENT_NOT_FOUND;
+
+import com.gdschongik.gdsc.domain.study.domain.StudyAnnouncement;
+import com.gdschongik.gdsc.global.exception.CustomException;
+import org.springframework.data.jpa.repository.JpaRepository;
+
+public interface StudyAnnouncementRepository extends JpaRepository<StudyAnnouncement, Long> {
+
+    default StudyAnnouncement getById(Long id) {
+        return findById(id).orElseThrow(() -> new CustomException(STUDY_ANNOUNCEMENT_NOT_FOUND));
+    }
+}

src/main/java/com/gdschongik/gdsc/domain/study/dao/StudyRepository.java

@@ -1,11 +1,18 @@
 package com.gdschongik.gdsc.domain.study.dao;
 
+import static com.gdschongik.gdsc.global.exception.ErrorCode.STUDY_NOT_FOUND;
+
 import com.gdschongik.gdsc.domain.member.domain.Member;
 import com.gdschongik.gdsc.domain.study.domain.Study;
+import com.gdschongik.gdsc.global.exception.CustomException;
 import java.util.List;
 import org.springframework.data.jpa.repository.JpaRepository;
 
 public interface StudyRepository extends JpaRepository<Study, Long> {
 
+    default Study getById(Long id) {
+        return findById(id).orElseThrow(() -> new CustomException(STUDY_NOT_FOUND));
+    }
+
     List<Study> findAllByMentor(Member mentor);
 }

src/main/java/com/gdschongik/gdsc/domain/study/domain/StudyNotification.java → src/main/java/com/gdschongik/gdsc/domain/study/domain/StudyAnnouncement.java

@@ -10,17 +10,18 @@
 import jakarta.persistence.JoinColumn;
 import jakarta.persistence.ManyToOne;
 import lombok.AccessLevel;
+import lombok.Builder;
 import lombok.Getter;
 import lombok.NoArgsConstructor;
 
 @Getter
 @Entity
 @NoArgsConstructor(access = AccessLevel.PROTECTED)
-public class StudyNotification extends BaseEntity {
+public class StudyAnnouncement extends BaseEntity {
 
     @Id
     @GeneratedValue(strategy = GenerationType.IDENTITY)
-    @Column(name = "study_notification_id")
+    @Column(name = "study_announcement_id")
     private Long id;
 
     @ManyToOne(fetch = FetchType.LAZY)
@@ -31,4 +32,20 @@ public class StudyNotification extends BaseEntity {
 
     @Column(columnDefinition = "TEXT")
     private String link;
+
+    @Builder(access = AccessLevel.PRIVATE)
+    public StudyAnnouncement(Study study, String title, String link) {
+        this.study = study;
+        this.title = title;
+        this.link = link;
+    }
+
+    public static StudyAnnouncement createStudyAnnouncement(Study study, String title, String link) {
+        return StudyAnnouncement.builder().study(study).title(title).link(link).build();
+    }
+
+    public void update(String title, String link) {
+        this.title = title;
+        this.link = link;
+    }
 }

src/main/java/com/gdschongik/gdsc/domain/study/dto/request/StudyAnnouncementCreateUpdateRequest.java

@@ -0,0 +1,8 @@
+package com.gdschongik.gdsc.domain.study.dto.request;
+
+import io.swagger.v3.oas.annotations.media.Schema;
+import jakarta.validation.constraints.NotBlank;
+
+public record StudyAnnouncementCreateUpdateRequest(
+        @NotBlank(message = "공지제목이 비었습니다.") @Schema(description = "공지제목") String title,
+        @Schema(description = "공지링크") String link) {}

src/main/java/com/gdschongik/gdsc/domain/study/dto/request/StudyAttendRequest.java → src/main/java/com/gdschongik/gdsc/domain/study/dto/request/StudyAttendCreateRequest.java

@@ -6,7 +6,7 @@
 import jakarta.validation.constraints.NotBlank;
 import jakarta.validation.constraints.Pattern;
 
-public record StudyAttendRequest(
+public record StudyAttendCreateRequest(
         @NotBlank
                 @Pattern(regexp = ATTENDANCE_NUMBER, message = "출석번호는 " + ATTENDANCE_NUMBER + " 형식이어야 합니다.")
                 @Schema(description = "출석번호")

src/main/java/com/gdschongik/gdsc/global/exception/ErrorCode.java

@@ -123,6 +123,9 @@ public enum ErrorCode {
             HttpStatus.CONFLICT, "이미 제출한 과제가 있으므로 레포지토리를 수정할 수 없습니다."),
     STUDY_HISTORY_REPOSITORY_NOT_UPDATABLE_OWNER_MISMATCH(HttpStatus.CONFLICT, "레포지토리 소유자가 현재 멤버와 다릅니다."),
 
+    // StudyAnnouncement
+    STUDY_ANNOUNCEMENT_NOT_FOUND(HttpStatus.NOT_FOUND, "존재하지 않는 스터디 공지입니다."),
+
     // Attendance
     ATTENDANCE_DATE_INVALID(HttpStatus.CONFLICT, "강의일이 아니면 출석체크할 수 없습니다."),
     ATTENDANCE_NUMBER_MISMATCH(HttpStatus.CONFLICT, "출석번호가 일치하지 않습니다."),