feat: 내 할일 목록 조회 API 추가

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

@@ -3,6 +3,7 @@
 import com.gdschongik.gdsc.domain.study.application.StudentStudyDetailService;
 import com.gdschongik.gdsc.domain.study.dto.response.AssignmentDashboardResponse;
 import com.gdschongik.gdsc.domain.study.dto.response.StudyStudentSessionResponse;
+import com.gdschongik.gdsc.domain.study.dto.response.StudyTodoResponse;
 import io.swagger.v3.oas.annotations.Operation;
 import io.swagger.v3.oas.annotations.tags.Tag;
 import java.util.List;
@@ -29,6 +30,13 @@ public ResponseEntity<AssignmentDashboardResponse> getSubmittableAssignments(
         return ResponseEntity.ok(response);
     }
 
+    @Operation(summary = "내 할일 리스트 조회", description = "해당 스터디의 내 할일 리스트를 조회합니다")
+    @GetMapping("/todo")
+    public ResponseEntity<List<StudyTodoResponse>> getStudyTodoList(@RequestParam(name = "studyId") Long studyId) {
+        List<StudyTodoResponse> response = studentStudyDetailService.getStudyTodoList(studyId);
+        return ResponseEntity.ok(response);
+    }
+
     // TODO 스터디 세션 워딩을 커리큘럼으로 변경해야함
     @Operation(summary = "스터디 커리큘럼 조회", description = "해당 스터디의 커리큘럼들을 조회합니다.")
     @GetMapping("/sessions")

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

@@ -12,10 +12,13 @@
 import com.gdschongik.gdsc.domain.study.dto.response.AssignmentDashboardResponse;
 import com.gdschongik.gdsc.domain.study.dto.response.AssignmentSubmittableDto;
 import com.gdschongik.gdsc.domain.study.dto.response.StudyStudentSessionResponse;
+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.time.LocalDateTime;
+import java.util.ArrayList;
 import java.util.List;
 import lombok.RequiredArgsConstructor;
 import org.springframework.stereotype.Service;
@@ -54,6 +57,31 @@ studyDetail, getSubmittedAssignment(assignmentHistories, studyDetail)))
     }
 
     @Transactional(readOnly = true)
+    public List<StudyTodoResponse> getStudyTodoList(Long studyId) {
+        Member member = memberUtil.getCurrentMember();
+        final List<StudyDetail> studyDetails = studyDetailRepository.findAllByStudyIdOrderByWeekAsc(studyId);
+        final List<AssignmentHistory> assignmentHistories =
+                assignmentHistoryRepository.findAssignmentHistoriesByStudentAndStudy(member, studyId);
+        final List<Attendance> attendances = attendanceRepository.findByMemberAndStudyId(member, studyId);
+
+        LocalDate now = LocalDate.now();
+        List<StudyTodoResponse> response = new ArrayList<>();
+        // 출석체크 정보 (개설 상태이고, 오늘이 출석체크날짜인 것)
+        studyDetails.stream()
+                .filter(studyDetail -> studyDetail.getSession().isOpen()
+                        && studyDetail.getAttendanceDay().equals(now))
+                .forEach(studyDetail -> response.add(StudyTodoResponse.createAttendanceType(
+                        studyDetail, now, isAttended(attendances, studyDetail))));
+
+        // 과제 정보 (오늘이 과제 제출 기간에 포함된 과제 정보)
+        studyDetails.stream()
+                .filter(studyDetail -> studyDetail.getAssignment().isOpen()
+                        && studyDetail.getAssignment().isDeadlineRemaining())
+                .forEach(studyDetail -> response.add(StudyTodoResponse.createAssignmentType(
+                        studyDetail, getSubmittedAssignment(assignmentHistories, studyDetail))));
+        return response;
+    }
+
     public List<StudyStudentSessionResponse> getStudySessions(Long studyId) {
         Member member = memberUtil.getCurrentMember();
         final List<StudyDetail> studyDetails = studyDetailRepository.findAllByStudyIdOrderByWeekAsc(studyId);

src/main/java/com/gdschongik/gdsc/domain/study/domain/StudyDetail.java

@@ -8,6 +8,7 @@
 import com.gdschongik.gdsc.domain.study.domain.vo.Session;
 import com.gdschongik.gdsc.global.exception.CustomException;
 import jakarta.persistence.*;
+import java.time.DayOfWeek;
 import java.time.LocalDate;
 import java.time.LocalDateTime;
 import java.time.LocalTime;
@@ -97,10 +98,25 @@ public boolean isAssignmentDeadlineRemaining() {
 
     // 스터디 시작일자 + 현재 주차 * 7 + (스터디 요일 - 스터디 기간 시작 요일)
     public LocalDate getAttendanceDay() {
-        return study.getStartDate()
-                .plusDays(week * 7
-                        + study.getDayOfWeek().getValue()
-                        - study.getStartDate().getDayOfWeek().getValue());
+        // 스터디 시작일자
+        LocalDate startDate = study.getStartDate();
+
+        // 스터디 요일
+        DayOfWeek studyDayOfWeek = study.getDayOfWeek();
+
+        // 스터디 기간 시작 요일
+        DayOfWeek startDayOfWeek = startDate.getDayOfWeek();
+
+        // 스터디 요일이 스터디 기간 시작 요일보다 앞서면, 다음 주로 넘어가게 처리
+        Long daysDifference = Long.valueOf(studyDayOfWeek.getValue() - startDayOfWeek.getValue());
+        if (daysDifference < 0) {
+            daysDifference += 7;
+        }
+
+        // 현재 주차에 따른 일수 계산
+        Long daysToAdd = (week - 1) * 7 + daysDifference;
+
+        return startDate.plusDays(daysToAdd);
     }
 
     public void updateSession(

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

@@ -55,4 +55,9 @@ public static Session generateSession(
                 .status(status)
                 .build();
     }
+
+    // 데이터 전달 로직
+    public boolean isOpen() {
+        return status == StudyStatus.OPEN;
+    }
 }

src/main/java/com/gdschongik/gdsc/domain/study/dto/response/StudyTodoResponse.java

@@ -0,0 +1,53 @@
+package com.gdschongik.gdsc.domain.study.dto.response;
+
+import static com.gdschongik.gdsc.domain.study.dto.response.StudyTodoResponse.StudyTodoType.ASSIGNMENT;
+import static com.gdschongik.gdsc.domain.study.dto.response.StudyTodoResponse.StudyTodoType.ATTENDANCE;
+
+import com.gdschongik.gdsc.domain.study.domain.AssignmentHistory;
+import com.gdschongik.gdsc.domain.study.domain.StudyDetail;
+import io.swagger.v3.oas.annotations.media.Schema;
+import java.time.LocalDate;
+import java.time.LocalDateTime;
+import lombok.Getter;
+import lombok.RequiredArgsConstructor;
+
+public record StudyTodoResponse(
+        Long studyDetailId,
+        @Schema(description = "현 주차수") Long week,
+        @Schema(description = "할일 타입") StudyTodoType todoType,
+        @Schema(description = "마감 시각") LocalDateTime deadLine,
+        @Schema(description = "출석 상태 (출석타입일 때만 사용)") AttendanceStatusResponse attendanceStatus,
+        @Schema(description = "과제 제목 (과제타입일 때만 사용)") String assignmentTitle,
+        @Schema(description = "과제 제출 상태 (과제타입일 때만 사용)") AssignmentSubmissionStatusResponse assignmentSubmissionStatus) {
+
+    public static StudyTodoResponse createAttendanceType(StudyDetail studyDetail, LocalDate now, boolean isAttended) {
+        return new StudyTodoResponse(
+                studyDetail.getId(),
+                studyDetail.getWeek(),
+                ATTENDANCE,
+                studyDetail.getAttendanceDay().atTime(23, 59, 59),
+                AttendanceStatusResponse.of(studyDetail, now, isAttended),
+                null,
+                null);
+    }
+
+    public static StudyTodoResponse createAssignmentType(StudyDetail studyDetail, AssignmentHistory assignmentHistory) {
+        return new StudyTodoResponse(
+                studyDetail.getId(),
+                studyDetail.getWeek(),
+                ASSIGNMENT,
+                studyDetail.getAssignment().getDeadline(),
+                null,
+                studyDetail.getAssignment().getTitle(),
+                AssignmentSubmissionStatusResponse.from(assignmentHistory));
+    }
+
+    @Getter
+    @RequiredArgsConstructor
+    public enum StudyTodoType {
+        ATTENDANCE("출석"),
+        ASSIGNMENT("과제");
+
+        private final String value;
+    }
+}