feat: 멤버 탈퇴 api 구현

src/main/java/com/gdschongik/gdsc/domain/member/api/AdminMemberController.java

@@ -7,7 +7,9 @@
 import org.springframework.data.domain.Page;
 import org.springframework.data.domain.Pageable;
 import org.springframework.http.ResponseEntity;
+import org.springframework.web.bind.annotation.DeleteMapping;
 import org.springframework.web.bind.annotation.GetMapping;
+import org.springframework.web.bind.annotation.PathVariable;
 import org.springframework.web.bind.annotation.RequestMapping;
 import org.springframework.web.bind.annotation.RestController;
 
@@ -23,4 +25,10 @@ public ResponseEntity<Page<MemberFindAllResponse>> getMembers(MemberQueryRequest
         Page<MemberFindAllResponse> response = memberService.findAll(queryRequest, pageable);
         return ResponseEntity.ok().body(response);
     }
+
+    @DeleteMapping("/{memberId}")
+    public ResponseEntity<Void> withdrawMember(@PathVariable Long memberId) {
+        memberService.withdrawMember(memberId);
+        return ResponseEntity.ok().build();
+    }
 }

src/main/java/com/gdschongik/gdsc/domain/member/application/MemberService.java

@@ -1,9 +1,13 @@
 package com.gdschongik.gdsc.domain.member.application;
 
+import static com.gdschongik.gdsc.global.exception.ErrorCode.*;
+
+import com.gdschongik.gdsc.domain.auth.dao.RefreshTokenRepository;
 import com.gdschongik.gdsc.domain.member.dao.MemberRepository;
 import com.gdschongik.gdsc.domain.member.domain.Member;
 import com.gdschongik.gdsc.domain.member.dto.request.MemberQueryRequest;
 import com.gdschongik.gdsc.domain.member.dto.response.MemberFindAllResponse;
+import com.gdschongik.gdsc.global.exception.CustomException;
 import lombok.RequiredArgsConstructor;
 import org.springframework.data.domain.Page;
 import org.springframework.data.domain.Pageable;
@@ -16,9 +20,16 @@
 public class MemberService {
 
     private final MemberRepository memberRepository;
+    private final RefreshTokenRepository refreshTokenRepository;
 
     public Page<MemberFindAllResponse> findAll(MemberQueryRequest queryRequest, Pageable pageable) {
         Page<Member> members = memberRepository.findAll(queryRequest, pageable);
         return members.map(MemberFindAllResponse::of);
     }
+
+    @Transactional
+    public void withdrawMember(Long memberId) {
+        Member member = memberRepository.findById(memberId).orElseThrow(() -> new CustomException(MEMBER_NOT_FOUND));
+        member.softDelete();
+    }
 }

src/main/java/com/gdschongik/gdsc/domain/member/domain/Member.java

@@ -1,6 +1,9 @@
 package com.gdschongik.gdsc.domain.member.domain;
 
+import static com.gdschongik.gdsc.global.exception.ErrorCode.*;
+
 import com.gdschongik.gdsc.domain.common.model.BaseTimeEntity;
+import com.gdschongik.gdsc.global.exception.CustomException;
 import jakarta.persistence.Column;
 import jakarta.persistence.Entity;
 import jakarta.persistence.EnumType;
@@ -86,4 +89,15 @@ public static Member createGuestMember(String oauthId) {
                 .status(MemberStatus.NORMAL)
                 .build();
     }
+
+    public void softDelete() {
+        if (this.status.isDeleted()) {
+            throw new CustomException(MEMBER_SOFT_DELETED);
+        }
+        this.status = MemberStatus.DELETED;
+    }
+
+    public boolean isDeleted() {
+        return this.status.isDeleted();
+    }
 }

src/main/java/com/gdschongik/gdsc/domain/member/domain/MemberStatus.java

@@ -11,4 +11,8 @@ public enum MemberStatus {
     FORBIDDEN("FORBIDDEN");
 
     private final String value;
+
+    public boolean isDeleted() {
+        return this.equals(DELETED);
+    }
 }

src/main/java/com/gdschongik/gdsc/global/exception/ErrorCode.java

@@ -14,7 +14,11 @@ public enum ErrorCode {
     EXPIRED_JWT_TOKEN(HttpStatus.UNAUTHORIZED, "만료된 JWT 토큰입니다."),
 
     // Parameter
-    INVALID_QUERY_PARAMETER(HttpStatus.BAD_REQUEST, "잘못된 쿼리 파라미터입니다.");
+    INVALID_QUERY_PARAMETER(HttpStatus.BAD_REQUEST, "잘못된 쿼리 파라미터입니다."),
+
+    // Member
+    MEMBER_NOT_FOUND(HttpStatus.NOT_FOUND, "존재하지 않는 회원입니다."),
+    MEMBER_SOFT_DELETED(HttpStatus.BAD_REQUEST, "soft delete된 회원입니다.");
 
     private final HttpStatus status;
     private final String message;

src/main/java/com/gdschongik/gdsc/global/security/CustomUserService.java

@@ -2,6 +2,8 @@
 
 import com.gdschongik.gdsc.domain.member.dao.MemberRepository;
 import com.gdschongik.gdsc.domain.member.domain.Member;
+import com.gdschongik.gdsc.global.exception.CustomException;
+import com.gdschongik.gdsc.global.exception.ErrorCode;
 import lombok.RequiredArgsConstructor;
 import lombok.extern.slf4j.Slf4j;
 import org.springframework.security.oauth2.client.userinfo.DefaultOAuth2UserService;
@@ -23,7 +25,12 @@ public OAuth2User loadUser(OAuth2UserRequest userRequest) throws OAuth2Authentic
     }
 
     private Member fetchOrCreate(OAuth2User oAuth2User) {
-        return memberRepository.findByOauthId(oAuth2User.getName()).orElseGet(() -> registerMember(oAuth2User));
+        Member member =
+                memberRepository.findByOauthId(oAuth2User.getName()).orElseGet(() -> registerMember(oAuth2User));
+        if (member.isDeleted()) {
+            throw new CustomException(ErrorCode.MEMBER_SOFT_DELETED);
+        }
+        return member;
     }
 
     private Member registerMember(OAuth2User oAuth2User) {