[feat] 전형 단게 추가 기능 구현

src/main/java/com/example/letscareer/common/exception/enums/SuccessCode.java

@@ -24,7 +24,8 @@ public enum SuccessCode {
     MID_REVIEW_SAVE_SUCCESS(HttpStatus.CREATED, "중간 전형 회고 추가 성공"),
     INT_REVIEW_SAVE_SUCCESS(HttpStatus.CREATED, "면접 회고 추가 성공"),
     SELF_INTRO_SAVE_SUCCESS(HttpStatus.CREATED, "자기소개 추가 성공"),
-    APPEAL_CAREERS_ADD_SUCCESS(HttpStatus.CREATED, "어필할 커리어 추가 성공");
+    APPEAL_CAREERS_ADD_SUCCESS(HttpStatus.CREATED, "어필할 커리어 추가 성공"),
+    STAGE_ADD_SUCCESS(HttpStatus.CREATED, "전형 단계 추가 성공");
 
     private final HttpStatus httpStatus;
     private final String message;

src/main/java/com/example/letscareer/schedule/domain/Schedule.java

@@ -1,11 +1,13 @@
 package com.example.letscareer.schedule.domain;
 
+import com.example.letscareer.stage.domain.Stage;
 import com.example.letscareer.user.domain.User;
 import jakarta.persistence.*;
 import lombok.*;
 import org.antlr.v4.runtime.misc.NotNull;
 
 import java.util.Date;
+import java.util.List;
 
 @Entity
 @Getter
@@ -31,4 +33,7 @@ public class Schedule {
     private Progress progress;
 
     private String url;
+
+    @OneToMany(mappedBy = "schedule", fetch = FetchType.LAZY, cascade = CascadeType.ALL)
+    private List<Stage> stages;
 }

src/main/java/com/example/letscareer/stage/controller/StageController.java

@@ -0,0 +1,35 @@
+package com.example.letscareer.stage.controller;
+
+import com.example.letscareer.common.dto.ApiResponse;
+import com.example.letscareer.common.dto.ErrorResponse;
+import com.example.letscareer.common.dto.SuccessResponse;
+import com.example.letscareer.common.exception.enums.SuccessCode;
+import com.example.letscareer.common.exception.model.BadRequestException;
+import com.example.letscareer.common.exception.model.NotFoundException;
+import com.example.letscareer.stage.dto.request.AddStageRequest;
+import com.example.letscareer.stage.dto.response.AddStageResponse;
+import com.example.letscareer.stage.service.StageService;
+import lombok.RequiredArgsConstructor;
+import org.springframework.web.bind.annotation.*;
+
+@RestController
+@RequiredArgsConstructor
+public class StageController {
+
+    private final StageService stageService;
+
+    @PostMapping("/schedules/{scheduleId}/stages")
+    public ApiResponse addStage(
+            @RequestHeader("userId") Long userId,
+            @PathVariable Long scheduleId,
+            @RequestBody AddStageRequest request
+            ) {
+
+        try {
+            AddStageResponse response = stageService.addStage(userId, scheduleId, request);
+            return SuccessResponse.success(SuccessCode.STAGE_ADD_SUCCESS, response);
+        } catch (NotFoundException | BadRequestException e) {
+            return ErrorResponse.error(e.getErrorCode());
+        }
+    }
+}

src/main/java/com/example/letscareer/stage/dto/request/AddStageRequest.java

@@ -0,0 +1,15 @@
+package com.example.letscareer.stage.dto.request;
+
+import com.example.letscareer.stage.domain.Type;
+import jakarta.persistence.EnumType;
+import jakarta.persistence.Enumerated;
+
+import java.time.LocalDate;
+
+public record AddStageRequest(
+        @Enumerated(EnumType.STRING)
+        Type type,
+        String mid_name,
+        LocalDate date
+) {
+}

src/main/java/com/example/letscareer/stage/dto/response/AddStageResponse.java

@@ -0,0 +1,13 @@
+package com.example.letscareer.stage.dto.response;
+
+import java.time.LocalDate;
+
+public record AddStageResponse(
+        Long stageId,
+        String type,
+        String mid_name,
+        String status,
+        LocalDate date,
+        int dday
+) {
+}

src/main/java/com/example/letscareer/stage/service/StageService.java

@@ -1,10 +1,62 @@
 package com.example.letscareer.stage.service;
 
+import com.example.letscareer.common.exception.model.NotFoundException;
+import com.example.letscareer.schedule.domain.Schedule;
+import com.example.letscareer.schedule.repository.ScheduleRepository;
+import com.example.letscareer.stage.domain.Stage;
+import com.example.letscareer.stage.domain.Status;
+import com.example.letscareer.stage.dto.request.AddStageRequest;
+import com.example.letscareer.stage.dto.response.AddStageResponse;
+import com.example.letscareer.stage.repository.StageRepository;
+import jakarta.transaction.Transactional;
 import lombok.RequiredArgsConstructor;
+import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.stereotype.Service;
 
+import java.time.LocalDate;
+import java.time.Period;
+
+import static com.example.letscareer.common.exception.enums.ErrorCode.SCHEDULE_NOT_FOUND_EXCEPTION;
+
 @Service
 @RequiredArgsConstructor
 public class StageService {
 
+    @Autowired
+    private final StageRepository stageRepository;
+    private final ScheduleRepository scheduleRepository;
+
+    @Transactional
+    public AddStageResponse addStage(Long userId, Long scheduleId, AddStageRequest request) {
+        Schedule schedule = scheduleRepository.findById(scheduleId)
+                .orElseThrow(() -> new NotFoundException(SCHEDULE_NOT_FOUND_EXCEPTION));
+
+        Stage stage = Stage.builder()
+                .schedule(schedule)
+                .type(request.type())
+                .midName(request.mid_name())
+                .date(request.date())
+                .status(Status.DO)
+                .order(schedule.getStages().size() + 1)
+                .build();
+
+        stageRepository.save(stage);
+
+        // D-day 계산
+        Integer dday = (request.date() != null) ? calculateDday(request.date()) : null;
+
+        return new AddStageResponse(
+                stage.getStageId(),
+                stage.getType().getValue(),
+                stage.getMidName(),
+                stage.getStatus().getValue(),
+                stage.getDate(),
+                dday);
+    }
+
+    private int calculateDday(LocalDate deadline) {
+        int dday = Period.between(LocalDate.now(), deadline).getDays();
+        return dday;
+    }
+
 }