[LAS-67] feat: 모집글 상세에서 회원의 신청 상태 여부 체크를 위한 서비스 레이어 구현

api-server/src/main/java/com/lastone/apiserver/service/recruitment/RecruitmentService.java

@@ -1,9 +1,6 @@
 package com.lastone.apiserver.service.recruitment;
 
-import com.lastone.core.dto.recruitment.RecruitmentRequestDto;
-import com.lastone.core.dto.recruitment.RecruitmentDetailDto;
-import com.lastone.core.dto.recruitment.RecruitmentListDto;
-import com.lastone.core.dto.recruitment.RecruitmentSearchCondition;
+import com.lastone.core.dto.recruitment.*;
 import org.springframework.data.domain.Slice;
 import org.springframework.web.multipart.MultipartFile;
 import java.io.IOException;
@@ -22,4 +19,6 @@ public interface RecruitmentService {
     void updateRecruitment(Long recruitmentId, Long memberId, RecruitmentRequestDto recruitment, List<MultipartFile> imgFiles) throws IOException;
 
     void deleteRecruitment(Long recruitmentId, Long id);
+
+    RecruitmentApplyStatusForMember isAlreadyApplyRecruitment(Long recruitmentId, Long memberId);
 }

api-server/src/main/java/com/lastone/apiserver/service/recruitment/RecruitmentServiceImpl.java

@@ -13,10 +13,7 @@
 import com.lastone.core.domain.recruitment.Recruitment;
 import com.lastone.core.domain.recruitment_img.RecruitmentImg;
 import com.lastone.core.dto.gym.GymDto;
-import com.lastone.core.dto.recruitment.RecruitmentDetailDto;
-import com.lastone.core.dto.recruitment.RecruitmentListDto;
-import com.lastone.core.dto.recruitment.RecruitmentRequestDto;
-import com.lastone.core.dto.recruitment.RecruitmentSearchCondition;
+import com.lastone.core.dto.recruitment.*;
 import com.lastone.core.util.mapper.GymMapper;
 import com.lastone.core.repository.gym.GymRepository;
 import com.lastone.core.repository.member.MemberRepository;
@@ -113,6 +110,14 @@ public void deleteRecruitment(Long recruitmentId, Long memberId) {
         recruitment.delete();
     }
 
+    @Override
+    public RecruitmentApplyStatusForMember isAlreadyApplyRecruitment(Long recruitmentId, Long memberId) {
+        Recruitment recruitment = recruitmentRepository.findById(recruitmentId).orElseThrow(RecruitmentNotFoundException::new);
+        boolean result = recruitment.getApplications().stream()
+                .anyMatch(application -> application.getApplicant().getId().equals(memberId));
+        return new RecruitmentApplyStatusForMember(result);
+    }
+
     private void updateImgFiles(Recruitment recruitment, List<MultipartFile> imgFiles) throws IOException {
         if (imgFileIsExist(imgFiles)) {
             return;