[Backend] feat : 나의 여행 스케줄 D-day API 추가

backend/src/main/java/com/isp/backend/domain/schedule/controller/ScheduleController.java

@@ -1,8 +1,9 @@
 package com.isp.backend.domain.schedule.controller;
 
+import com.isp.backend.domain.schedule.dto.response.FastestScheduleResponse;
 import com.isp.backend.domain.schedule.dto.response.ScheduleListResponse;
 import com.isp.backend.domain.schedule.dto.request.ScheduleSaveRequest;
-import com.isp.backend.domain.schedule.service.ScheduleServiceImpl;
+import com.isp.backend.domain.schedule.service.ScheduleService;
 import com.isp.backend.global.security.CustomUserDetails;
 import lombok.RequiredArgsConstructor;
 import org.springframework.http.ResponseEntity;
@@ -16,13 +17,13 @@
 @RequiredArgsConstructor
 public class ScheduleController {
 
-    private final ScheduleServiceImpl scheduleServiceImpl;
+    private final ScheduleService scheduleService;
 
     /** 여행 일정 저장 API **/
     @PostMapping()
     public ResponseEntity<Void> saveSchedule(@AuthenticationPrincipal CustomUserDetails customUserDetails,
                                              @RequestBody ScheduleSaveRequest requestDTO) {
-        scheduleServiceImpl.saveSchedule(customUserDetails.getUsername(), requestDTO);
+        scheduleService.saveSchedule(customUserDetails.getUsername(), requestDTO);
         return ResponseEntity.ok().build();
     }
 
@@ -31,7 +32,7 @@ public ResponseEntity<Void> saveSchedule(@AuthenticationPrincipal CustomUserDeta
     @GetMapping()
     public ResponseEntity<List<ScheduleListResponse>> getScheduleList(@AuthenticationPrincipal CustomUserDetails userDetails) {
         String memberUid = userDetails.getUsername();
-        List<ScheduleListResponse> scheduleList = scheduleServiceImpl.getScheduleList(memberUid);
+        List<ScheduleListResponse> scheduleList = scheduleService.getScheduleList(memberUid);
         return ResponseEntity.ok(scheduleList);
     }
 
@@ -41,7 +42,7 @@ public ResponseEntity<List<ScheduleListResponse>> getScheduleList(@Authenticatio
     public ResponseEntity<ScheduleSaveRequest> getScheduleDetail(@AuthenticationPrincipal CustomUserDetails userDetails,
                                                                  @PathVariable Long scheduleId) {
         String memberUid = userDetails.getUsername();
-        ScheduleSaveRequest scheduleDetail = scheduleServiceImpl.getScheduleDetail(memberUid, scheduleId);
+        ScheduleSaveRequest scheduleDetail = scheduleService.getScheduleDetail(memberUid, scheduleId);
         return ResponseEntity.ok(scheduleDetail);
     }
 
@@ -51,7 +52,7 @@ public ResponseEntity<ScheduleSaveRequest> getScheduleDetail(@AuthenticationPrin
     public ResponseEntity<ScheduleSaveRequest> updateSchedule(@AuthenticationPrincipal CustomUserDetails userDetails,
                                                               @PathVariable Long scheduleId,
                                                               @RequestBody ScheduleSaveRequest requestDTO) {
-        ScheduleSaveRequest updatedSchedule = scheduleServiceImpl.updateSchedule(userDetails.getUsername(), scheduleId, requestDTO);
+        ScheduleSaveRequest updatedSchedule = scheduleService.updateSchedule(userDetails.getUsername(), scheduleId, requestDTO);
         return ResponseEntity.ok(updatedSchedule);
     }
 
@@ -61,9 +62,22 @@ public ResponseEntity<ScheduleSaveRequest> updateSchedule(@AuthenticationPrincip
     public ResponseEntity<Void> deleteSchedule(@AuthenticationPrincipal CustomUserDetails userDetails,
                                                @PathVariable Long scheduleId) {
         String memberUid = userDetails.getUsername();
-        scheduleServiceImpl.deleteSchedule(memberUid, scheduleId);
+        scheduleService.deleteSchedule(memberUid, scheduleId);
         return ResponseEntity.ok().build();
     }
 
 
+    /** 나의 가까운 일정 조회 API **/
+    @GetMapping("/dday")
+    public ResponseEntity<FastestScheduleResponse> getFastestSchedule(@AuthenticationPrincipal CustomUserDetails userDetails) {
+        String memberUid = userDetails.getUsername();
+        FastestScheduleResponse fastestScheduleResponse = scheduleService.getFastestSchedule(memberUid);
+        return ResponseEntity.ok(fastestScheduleResponse);
+    }
+
+
+    /** 내가 최근 생성한 5개 일정 조회 API **/
+//    public ResponseEntity<>
+
+
 }

backend/src/main/java/com/isp/backend/domain/schedule/dto/response/FastestScheduleResponse.java

@@ -0,0 +1,22 @@
+package com.isp.backend.domain.schedule.dto.response;
+
+import lombok.AllArgsConstructor;
+import lombok.Getter;
+import lombok.NoArgsConstructor;
+import lombok.Setter;
+
+@Getter
+@Setter
+@NoArgsConstructor
+@AllArgsConstructor
+public class FastestScheduleResponse {
+
+    private Long id;
+
+    private String scheduleName; // 여행지 이름
+
+    private String dday; // 디데이
+
+    private String imageUrl; // 이미지 url
+
+}

backend/src/main/java/com/isp/backend/domain/schedule/mapper/ScheduleMapper.java

@@ -4,12 +4,15 @@
 import com.isp.backend.domain.member.entity.Member;
 import com.isp.backend.domain.schedule.dto.request.DailySchedule;
 import com.isp.backend.domain.schedule.dto.request.ScheduleDetail;
+import com.isp.backend.domain.schedule.dto.response.FastestScheduleResponse;
 import com.isp.backend.domain.schedule.dto.response.ScheduleListResponse;
 import com.isp.backend.domain.schedule.dto.request.ScheduleSaveRequest;
 import com.isp.backend.domain.schedule.entity.Schedule;
 import lombok.RequiredArgsConstructor;
 import org.springframework.stereotype.Component;
 
+import java.time.LocalDate;
+import java.time.temporal.ChronoUnit;
 import java.util.Comparator;
 import java.util.List;
 import java.util.concurrent.atomic.AtomicInteger;
@@ -143,6 +146,33 @@ public List<com.isp.backend.domain.scheduleDetail.entity.ScheduleDetail> updateS
     }
 
 
+    /**
+     *  D-day
+     **/
+    public FastestScheduleResponse toFastestScheduleDTO(Schedule schedule) {
+        FastestScheduleResponse response = new FastestScheduleResponse();
+        response.setId(schedule.getId());
+        response.setScheduleName(schedule.getScheduleName());
+        response.setDday(calculateDday(schedule.getStartDate()));
+        String imageUrl = schedule.getCountry().getImageUrl();
+        response.setImageUrl(imageUrl);
+
+        return response;
+    }
+
+
+    /**
+     * D-day 계산 메서드
+     **/
+    private String calculateDday(String startDateString) {
+        LocalDate today = LocalDate.now();
+        LocalDate startDate = LocalDate.parse(startDateString);
+        long dday = ChronoUnit.DAYS.between(today, startDate) + 1; // 오늘-시작일까지의 날짜 수 계산
+        return Long.toString(dday);
+    }
+
+
+
 }
 
 

backend/src/main/java/com/isp/backend/domain/schedule/service/ScheduleService.java

@@ -2,6 +2,7 @@
 
 import com.isp.backend.domain.country.entity.Country;
 import com.isp.backend.domain.member.entity.Member;
+import com.isp.backend.domain.schedule.dto.response.FastestScheduleResponse;
 import com.isp.backend.domain.schedule.dto.response.ScheduleListResponse;
 import com.isp.backend.domain.schedule.dto.request.ScheduleSaveRequest;
 import com.isp.backend.domain.schedule.entity.Schedule;
@@ -18,6 +19,8 @@ public interface ScheduleService {
 
     void deleteSchedule(String uid, Long scheduleId);
 
+    FastestScheduleResponse getFastestSchedule(String uid);
+
     ScheduleSaveRequest updateSchedule(String uid, Long scheduleId, ScheduleSaveRequest updateRequestDTO);
 
     void calculateTotalPrice(Schedule schedule);

backend/src/main/java/com/isp/backend/domain/schedule/service/ScheduleServiceImpl.java

@@ -5,6 +5,7 @@
 import com.isp.backend.domain.member.dto.response.MemberDetailResponse;
 import com.isp.backend.domain.member.entity.Member;
 import com.isp.backend.domain.member.repository.MemberRepository;
+import com.isp.backend.domain.schedule.dto.response.FastestScheduleResponse;
 import com.isp.backend.domain.schedule.dto.response.ScheduleListResponse;
 import com.isp.backend.domain.schedule.dto.request.ScheduleSaveRequest;
 import com.isp.backend.domain.schedule.entity.Schedule;
@@ -21,7 +22,11 @@
 import org.springframework.stereotype.Service;
 import org.springframework.transaction.annotation.Transactional;
 
+import java.time.LocalDate;
+import java.time.temporal.ChronoUnit;
+import java.util.Comparator;
 import java.util.List;
+import java.util.Optional;
 import java.util.stream.Collectors;
 
 @Slf4j
@@ -127,6 +132,31 @@ public void deleteSchedule(String uid, Long scheduleId) {
         scheduleRepository.save(findSchedule);
     }
 
+    /** 나의 여행 D-day 출력 **/
+    public FastestScheduleResponse getFastestSchedule(String uid) {
+        Member findMember = validateUserCheck(uid);
+        List<Schedule> schedules = scheduleRepository.findSchedulesByMember(findMember);
+
+        // 가장 가까운 여행 일정 찾기
+        LocalDate today = LocalDate.now();
+        Optional<Schedule> closestScheduleOptional = findClosestSchedule(schedules, today);
+
+        if (closestScheduleOptional.isPresent()) {
+            Schedule closestSchedule = closestScheduleOptional.get();
+            return scheduleMapper.toFastestScheduleDTO(closestSchedule);
+        } else {
+            throw new ScheduleNotFoundException();
+        }
+    }
+
+
+    /**  가장 가까운 일정 찾기 **/
+    private Optional<Schedule> findClosestSchedule(List<Schedule> schedules, LocalDate today) {
+        return schedules.stream()
+                .filter(schedule -> LocalDate.parse(schedule.getStartDate()).isAfter(today)) // 오늘 이후의 일정
+                .min(Comparator.comparing(s -> LocalDate.parse(s.getStartDate())));          // 시작일이 가장 빠른 순으로 정렬
+    }
+
 
     /**  여행 일정 총 경비 계산 **/
     @Override