[feat] #3 회원 service 클래스 구현

src/main/java/org/sopt/seminar/domain/member/service/MemberService.java

@@ -0,0 +1,66 @@
+package org.sopt.seminar.domain.member.service;
+
+import lombok.RequiredArgsConstructor;
+import org.sopt.seminar.domain.member.domain.Member;
+import org.sopt.seminar.domain.member.domain.Sopt;
+import org.sopt.seminar.domain.member.dto.request.MemberSaveRequest;
+import org.sopt.seminar.domain.member.dto.request.MemberUpdateRequest;
+import org.sopt.seminar.domain.member.dto.response.MemberGetResponse;
+import org.sopt.seminar.domain.member.dto.response.MemberSaveResponse;
+import org.sopt.seminar.domain.member.repository.MemberRepository;
+import org.sopt.seminar.global.error.ConflictException;
+import org.sopt.seminar.global.error.ErrorStatus;
+import org.springframework.data.domain.Pageable;
+import org.springframework.stereotype.Service;
+import org.springframework.transaction.annotation.Transactional;
+
+import java.util.List;
+
+import static org.sopt.seminar.domain.member.domain.Member.createMember;
+import static org.sopt.seminar.domain.member.domain.Sopt.createSopt;
+
+@RequiredArgsConstructor
+@Transactional(readOnly = true)
+@Service
+public class MemberService {
+    private final MemberRepository memberRepository;
+
+    @Transactional
+    public MemberSaveResponse saveMember(MemberSaveRequest memberSaveRequest) {
+        validateDuplicateMember(memberSaveRequest.nickname());
+        Member member = createMember(memberSaveRequest.name(), memberSaveRequest.nickname(),
+                memberSaveRequest.age(), memberSaveRequest.sopt());
+        Member savedMember = memberRepository.save(member);
+        return MemberSaveResponse.of(savedMember);
+    }
+
+    public MemberGetResponse getMember(Long memberId) {
+        Member findMember = memberRepository.findByIdOrThrow(memberId);
+        return MemberGetResponse.of(findMember);
+    }
+
+    public List<MemberGetResponse> getMembers(Pageable pageable) {
+        return memberRepository.findAll(pageable)
+                .stream()
+                .map(MemberGetResponse::of)
+                .toList();
+    }
+
+    @Transactional
+    public void updateMember(Long memberId, MemberUpdateRequest memberUpdateRequest) {
+        Member findMember = memberRepository.findByIdOrThrow(memberId);
+        Sopt sopt = createSopt(memberUpdateRequest.generation(), memberUpdateRequest.part());
+        findMember.updateSopt(sopt);
+    }
+
+    @Transactional
+    public void deleteMember(Long memberId) {
+        memberRepository.deleteById(memberId);
+    }
+
+    private void validateDuplicateMember(String nickname) {
+        if (memberRepository.existsByNickname(nickname)) {
+            throw new ConflictException(ErrorStatus.DUPLICATE_MEMBER);
+        }
+    }
+}