feat: 수강생 명단 페이지 대시보드 조회 API 추가

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

@@ -10,6 +10,8 @@
 import jakarta.validation.Valid;
 import java.util.List;
 import lombok.RequiredArgsConstructor;
+import org.springframework.data.domain.Page;
+import org.springframework.data.domain.Pageable;
 import org.springframework.http.ResponseEntity;
 import org.springframework.web.bind.annotation.*;
 
@@ -35,10 +37,10 @@ public ResponseEntity<List<StudyResponse>> getStudiesInCharge() {
         return ResponseEntity.ok(response);
     }
 
-    @Operation(summary = "스터디 수강생 명단 조회", description = "해당 스터디의 수강생 명단을 조회합니다")
+    @Operation(summary = "스터디 수강생 관리", description = "해당 스터디의 수강생을 관리합니다")
     @GetMapping("/{studyId}/students")
-    public ResponseEntity<List<StudyStudentResponse>> getStudyStudents(@PathVariable Long studyId) {
-        List<StudyStudentResponse> response = mentorStudyService.getStudyStudents(studyId);
+    public ResponseEntity<Page<StudyStudentResponse>> getStudyStudents(@PathVariable Long studyId, Pageable pageable) {
+        Page<StudyStudentResponse> response = mentorStudyService.getStudyStudents(studyId, pageable);
         return ResponseEntity.ok(response);
     }
 

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

@@ -1,8 +1,12 @@
 package com.gdschongik.gdsc.domain.study.application;
 
-import static com.gdschongik.gdsc.global.exception.ErrorCode.STUDY_NOT_FOUND;
+import static com.gdschongik.gdsc.global.exception.ErrorCode.*;
+import static java.util.stream.Collectors.*;
 
 import com.gdschongik.gdsc.domain.member.domain.Member;
+import com.gdschongik.gdsc.domain.study.dao.AssignmentHistoryRepository;
+import com.gdschongik.gdsc.domain.study.dao.AttendanceRepository;
+import com.gdschongik.gdsc.domain.study.dao.StudyAchievementRepository;
 import com.gdschongik.gdsc.domain.study.dao.StudyAnnouncementRepository;
 import com.gdschongik.gdsc.domain.study.dao.StudyDetailRepository;
 import com.gdschongik.gdsc.domain.study.dao.StudyHistoryRepository;
@@ -17,14 +21,19 @@
 import com.gdschongik.gdsc.domain.study.dto.request.StudyUpdateRequest;
 import com.gdschongik.gdsc.domain.study.dto.response.StudyResponse;
 import com.gdschongik.gdsc.domain.study.dto.response.StudyStudentResponse;
+import com.gdschongik.gdsc.domain.study.dto.response.StudyTodoResponse;
 import com.gdschongik.gdsc.global.exception.CustomException;
-import com.gdschongik.gdsc.global.exception.ErrorCode;
 import com.gdschongik.gdsc.global.util.MemberUtil;
+import java.time.LocalDate;
+import java.util.ArrayList;
 import java.util.List;
+import java.util.Map;
 import java.util.Set;
-import java.util.stream.Collectors;
 import lombok.RequiredArgsConstructor;
 import lombok.extern.slf4j.Slf4j;
+import org.springframework.data.domain.Page;
+import org.springframework.data.domain.PageImpl;
+import org.springframework.data.domain.Pageable;
 import org.springframework.stereotype.Service;
 import org.springframework.transaction.annotation.Transactional;
 
@@ -34,12 +43,15 @@
 public class MentorStudyService {
 
     private final MemberUtil memberUtil;
+    private final StudyValidator studyValidator;
+    private final StudyDetailValidator studyDetailValidator;
     private final StudyRepository studyRepository;
     private final StudyAnnouncementRepository studyAnnouncementRepository;
     private final StudyHistoryRepository studyHistoryRepository;
-    private final StudyValidator studyValidator;
     private final StudyDetailRepository studyDetailRepository;
-    private final StudyDetailValidator studyDetailValidator;
+    private final StudyAchievementRepository studyAchievementRepository;
+    private final AttendanceRepository attendanceRepository;
+    private final AssignmentHistoryRepository assignmentHistoryRepository;
 
     @Transactional(readOnly = true)
     public List<StudyResponse> getStudiesInCharge() {
@@ -49,15 +61,67 @@ public List<StudyResponse> getStudiesInCharge() {
     }
 
     @Transactional(readOnly = true)
-    public List<StudyStudentResponse> getStudyStudents(Long studyId) {
+    public Page<StudyStudentResponse> getStudyStudents(Long studyId, Pageable pageable) {
         Member currentMember = memberUtil.getCurrentMember();
-        Study study =
-                studyRepository.findById(studyId).orElseThrow(() -> new CustomException(ErrorCode.STUDY_NOT_FOUND));
-
+        Study study = studyRepository.findById(studyId).orElseThrow(() -> new CustomException(STUDY_NOT_FOUND));
         studyValidator.validateStudyMentor(currentMember, study);
-        List<StudyHistory> studyHistories = studyHistoryRepository.findByStudyId(studyId);
 
-        return studyHistories.stream().map(StudyStudentResponse::from).toList();
+        List<StudyDetail> studyDetails = studyDetailRepository.findAllByStudyId(studyId);
+        Page<StudyHistory> studyHistories = studyHistoryRepository.findByStudyId(studyId, pageable);
+        List<Long> studentIds = studyHistories.getContent().stream()
+                .map(studyHistory -> studyHistory.getStudent().getId())
+                .toList();
+        List<StudyAchievement> studyAchievements =
+                studyAchievementRepository.findByStudyIdAndMemberIds(studyId, studentIds);
+        List<Attendance> attendances = attendanceRepository.findByStudyIdAndMemberIds(studyId, studentIds);
+        List<AssignmentHistory> assignmentHistories =
+                assignmentHistoryRepository.findByStudyIdAndMemberIds(studyId, studentIds);
+
+        // StudyAchievement, Attendance, AssignmentHistory에 대해 Member의 id를 key로 하는 Map 생성
+        Map<Long, List<StudyAchievement>> studyAchievementMap = studyAchievements.stream()
+                .collect(groupingBy(
+                        studyAchievement -> studyAchievement.getStudent().getId()));
+        Map<Long, List<Attendance>> attendanceMap = attendances.stream()
+                .collect(groupingBy(attendance -> attendance.getStudent().getId()));
+        Map<Long, List<AssignmentHistory>> assignmentHistoryMap = assignmentHistories.stream()
+                .collect(groupingBy(
+                        assignmentHistory -> assignmentHistory.getMember().getId()));
+
+        List<StudyStudentResponse> response = new ArrayList<>();
+        studyHistories.getContent().forEach(studyHistory -> {
+            List<StudyAchievement> currentStudyAchievements =
+                    studyAchievementMap.getOrDefault(studyHistory.getStudent().getId(), new ArrayList<>());
+            List<Attendance> currentAttendances =
+                    attendanceMap.getOrDefault(studyHistory.getStudent().getId(), new ArrayList<>());
+            List<AssignmentHistory> currentAssignmentHistories =
+                    assignmentHistoryMap.getOrDefault(studyHistory.getStudent().getId(), new ArrayList<>());
+
+            List<StudyTodoResponse> studyTodos = new ArrayList<>();
+            studyDetails.forEach(studyDetail -> {
+                studyTodos.add(StudyTodoResponse.createAttendanceType(
+                        studyDetail, LocalDate.now(), isAttended(currentAttendances, studyDetail)));
+                studyTodos.add(StudyTodoResponse.createAssignmentType(
+                        studyDetail, getSubmittedAssignment(currentAssignmentHistories, studyDetail)));
+            });
+
+            response.add(StudyStudentResponse.of(studyHistory, currentStudyAchievements, studyTodos));
+        });
+
+        return new PageImpl<>(response, pageable, studyHistories.getTotalElements());
+    }
+
+    private boolean isAttended(List<Attendance> attendances, StudyDetail studyDetail) {
+        return attendances.stream()
+                .anyMatch(attendance -> attendance.getStudyDetail().getId().equals(studyDetail.getId()));
+    }
+
+    private AssignmentHistory getSubmittedAssignment(
+            List<AssignmentHistory> assignmentHistories, StudyDetail studyDetail) {
+        return assignmentHistories.stream()
+                .filter(assignmentHistory ->
+                        assignmentHistory.getStudyDetail().getId().equals(studyDetail.getId()))
+                .findFirst()
+                .orElse(null);
     }
 
     @Transactional
@@ -109,12 +173,12 @@ public void updateStudy(Long studyId, StudyUpdateRequest request) {
 
         List<StudyDetail> studyDetails = studyDetailRepository.findAllByStudyIdOrderByWeekAsc(studyId);
         // StudyDetail ID를 추출하여 Set으로 저장
-        Set<Long> studyDetailIds = studyDetails.stream().map(StudyDetail::getId).collect(Collectors.toSet());
+        Set<Long> studyDetailIds = studyDetails.stream().map(StudyDetail::getId).collect(toSet());
 
         // 요청된 StudyCurriculumCreateRequest의 StudyDetail ID를 추출하여 Set으로 저장
         Set<Long> requestIds = request.studyCurriculums().stream()
                 .map(StudyCurriculumCreateRequest::studyDetailId)
-                .collect(Collectors.toSet());
+                .collect(toSet());
 
         studyDetailValidator.validateUpdateStudyDetail(studyDetailIds, requestIds);
 

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

@@ -11,5 +11,7 @@ public interface AssignmentHistoryCustomRepository {
 
     List<AssignmentHistory> findAssignmentHistoriesByStudentAndStudyId(Member member, Long studyId);
 
+    List<AssignmentHistory> findByStudyIdAndMemberIds(Long studyId, List<Long> memberIds);
+
     void deleteByStudyIdAndMemberId(Long studyId, Long memberId);
 }

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

@@ -1,19 +1,18 @@
 package com.gdschongik.gdsc.domain.study.dao;
 
-import static com.gdschongik.gdsc.domain.study.domain.AssignmentSubmissionStatus.*;
 import static com.gdschongik.gdsc.domain.study.domain.QAssignmentHistory.*;
 import static com.gdschongik.gdsc.domain.study.domain.QStudyDetail.studyDetail;
 
 import com.gdschongik.gdsc.domain.member.domain.Member;
 import com.gdschongik.gdsc.domain.study.domain.AssignmentHistory;
 import com.gdschongik.gdsc.domain.study.domain.Study;
-import com.querydsl.core.types.dsl.BooleanExpression;
 import com.querydsl.jpa.impl.JPAQueryFactory;
 import java.util.List;
 import lombok.RequiredArgsConstructor;
 
 @RequiredArgsConstructor
-public class AssignmentHistoryCustomRepositoryImpl implements AssignmentHistoryCustomRepository {
+public class AssignmentHistoryCustomRepositoryImpl
+        implements AssignmentHistoryCustomRepository, AssignmentHistoryQueryMethod {
 
     private final JPAQueryFactory queryFactory;
 
@@ -28,18 +27,6 @@ public boolean existsSubmittedAssignmentByMemberAndStudy(Member member, Study st
         return fetchOne != null;
     }
 
-    private BooleanExpression eqMember(Member member) {
-        return member == null ? null : assignmentHistory.member.eq(member);
-    }
-
-    private BooleanExpression eqStudy(Study study) {
-        return study == null ? null : assignmentHistory.studyDetail.study.eq(study);
-    }
-
-    private BooleanExpression isSubmitted() {
-        return assignmentHistory.submissionStatus.in(FAILURE, SUCCESS);
-    }
-
     @Override
     public List<AssignmentHistory> findAssignmentHistoriesByStudentAndStudyId(Member currentMember, Long studyId) {
         return queryFactory
@@ -50,10 +37,6 @@ public List<AssignmentHistory> findAssignmentHistoriesByStudentAndStudyId(Member
                 .fetch();
     }
 
-    private BooleanExpression eqStudyId(Long studyId) {
-        return studyId != null ? studyDetail.study.id.eq(studyId) : null;
-    }
-
     @Override
     public void deleteByStudyIdAndMemberId(Long studyId, Long memberId) {
         queryFactory
@@ -62,7 +45,13 @@ public void deleteByStudyIdAndMemberId(Long studyId, Long memberId) {
                 .execute();
     }
 
-    private BooleanExpression eqMemberId(Long memberId) {
-        return memberId != null ? assignmentHistory.member.id.eq(memberId) : null;
+    @Override
+    public List<AssignmentHistory> findByStudyIdAndMemberIds(Long studyId, List<Long> memberIds) {
+        return queryFactory
+                .selectFrom(assignmentHistory)
+                .innerJoin(assignmentHistory.studyDetail, studyDetail)
+                .fetchJoin()
+                .where(assignmentHistory.member.id.in(memberIds), eqStudyId(studyId))
+                .fetch();
     }
 }

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

@@ -0,0 +1,31 @@
+package com.gdschongik.gdsc.domain.study.dao;
+
+import static com.gdschongik.gdsc.domain.study.domain.AssignmentSubmissionStatus.*;
+import static com.gdschongik.gdsc.domain.study.domain.QAssignmentHistory.*;
+import static com.gdschongik.gdsc.domain.study.domain.QStudyDetail.*;
+
+import com.gdschongik.gdsc.domain.member.domain.Member;
+import com.gdschongik.gdsc.domain.study.domain.Study;
+import com.querydsl.core.types.dsl.BooleanExpression;
+
+public interface AssignmentHistoryQueryMethod {
+    default BooleanExpression eqMember(Member member) {
+        return member == null ? null : assignmentHistory.member.eq(member);
+    }
+
+    default BooleanExpression eqStudy(Study study) {
+        return study == null ? null : assignmentHistory.studyDetail.study.eq(study);
+    }
+
+    default BooleanExpression isSubmitted() {
+        return assignmentHistory.submissionStatus.in(FAILURE, SUCCESS);
+    }
+
+    default BooleanExpression eqStudyId(Long studyId) {
+        return studyId != null ? studyDetail.study.id.eq(studyId) : null;
+    }
+
+    default BooleanExpression eqMemberId(Long memberId) {
+        return memberId != null ? assignmentHistory.member.id.eq(memberId) : null;
+    }
+}

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

@@ -8,5 +8,6 @@
 
 public interface AssignmentHistoryRepository
         extends JpaRepository<AssignmentHistory, Long>, AssignmentHistoryCustomRepository {
+    // todo: public 제거
     public Optional<AssignmentHistory> findByMemberAndStudyDetail(Member member, StudyDetail studyDetail);
 }

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

@@ -7,5 +7,7 @@
 public interface AttendanceCustomRepository {
     List<Attendance> findByMemberAndStudyId(Member member, Long studyId);
 
+    List<Attendance> findByStudyIdAndMemberIds(Long studyId, List<Long> memberIds);
+
     void deleteByStudyIdAndMemberId(Long studyId, Long memberId);
 }

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

@@ -1,6 +1,5 @@
 package com.gdschongik.gdsc.domain.study.dao;
 
-import static com.gdschongik.gdsc.domain.member.domain.QMember.member;
 import static com.gdschongik.gdsc.domain.study.domain.QAttendance.attendance;
 import static com.gdschongik.gdsc.domain.study.domain.QStudyDetail.studyDetail;
 
@@ -26,6 +25,16 @@ public List<Attendance> findByMemberAndStudyId(Member member, Long studyId) {
                 .fetch();
     }
 
+    @Override
+    public List<Attendance> findByStudyIdAndMemberIds(Long studyId, List<Long> memberIds) {
+        return queryFactory
+                .selectFrom(attendance)
+                .innerJoin(attendance.studyDetail, studyDetail)
+                .fetchJoin()
+                .where(attendance.student.id.in(memberIds), eqStudyId(studyId))
+                .fetch();
+    }
+
     private BooleanExpression eqMemberId(Long memberId) {
         return memberId != null ? attendance.student.id.eq(memberId) : null;
     }

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

@@ -0,0 +1,8 @@
+package com.gdschongik.gdsc.domain.study.dao;
+
+import com.gdschongik.gdsc.domain.study.domain.StudyAchievement;
+import java.util.List;
+
+public interface StudyAchievementCustomRepository {
+    List<StudyAchievement> findByStudyIdAndMemberIds(Long studyId, List<Long> memberIds);
+}

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

@@ -0,0 +1,27 @@
+package com.gdschongik.gdsc.domain.study.dao;
+
+import static com.gdschongik.gdsc.domain.study.domain.QStudyAchievement.*;
+
+import com.gdschongik.gdsc.domain.study.domain.StudyAchievement;
+import com.querydsl.core.types.dsl.BooleanExpression;
+import com.querydsl.jpa.impl.JPAQueryFactory;
+import java.util.List;
+import lombok.RequiredArgsConstructor;
+
+@RequiredArgsConstructor
+public class StudyAchievementCustomRepositoryImpl implements StudyAchievementCustomRepository {
+
+    private final JPAQueryFactory queryFactory;
+
+    @Override
+    public List<StudyAchievement> findByStudyIdAndMemberIds(Long studyId, List<Long> memberIds) {
+        return queryFactory
+                .selectFrom(studyAchievement)
+                .where(eqStudyId(studyId), studyAchievement.student.id.in(memberIds))
+                .fetch();
+    }
+
+    private BooleanExpression eqStudyId(Long studyId) {
+        return studyId != null ? studyAchievement.study.id.eq(studyId) : null;
+    }
+}

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

@@ -0,0 +1,7 @@
+package com.gdschongik.gdsc.domain.study.dao;
+
+import com.gdschongik.gdsc.domain.study.domain.StudyAchievement;
+import org.springframework.data.jpa.repository.JpaRepository;
+
+public interface StudyAchievementRepository
+        extends JpaRepository<StudyAchievement, Long>, StudyAchievementCustomRepository {}

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

@@ -5,17 +5,19 @@
 import com.gdschongik.gdsc.domain.study.domain.StudyHistory;
 import java.util.List;
 import java.util.Optional;
+import org.springframework.data.domain.Page;
+import org.springframework.data.domain.Pageable;
 import org.springframework.data.jpa.repository.JpaRepository;
 
 public interface StudyHistoryRepository extends JpaRepository<StudyHistory, Long> {
 
-    List<StudyHistory> findByStudyId(Long studyId);
-
     List<StudyHistory> findAllByStudent(Member member);
 
     Optional<StudyHistory> findByStudentAndStudy(Member member, Study study);
 
     boolean existsByStudentAndStudy(Member member, Study study);
 
     Optional<StudyHistory> findByStudentAndStudyId(Member member, Long studyId);
+
+    Page<StudyHistory> findByStudyId(Long studyId, Pageable pageable);
 }

src/main/java/com/gdschongik/gdsc/domain/study/domain/vo/Curriculum.java

@@ -60,4 +60,8 @@ public static Curriculum generateCurriculum(
     public boolean isOpen() {
         return status == StudyStatus.OPEN;
     }
+
+    public boolean isCancelled() {
+        return status == StudyStatus.CANCELLED;
+    }
 }