Feat: /api/auth/member 관련 MemberService 추가

Related to: KakaoTech-BootCamp-Team-2#2

src/main/java/kaboo/kaboo_auth/domain/entity/Member.java

@@ -53,4 +53,15 @@ public Member(String username, String email, String koreaName, String englishNam
 		this.course = course;
 		this.role = role;
 	}
+
+	public void updateInfo(String koreaName, String englishName, int classNum, Course course) {
+		this.koreaName = koreaName;
+		this.englishName = englishName;
+		this.classNum = classNum;
+		this.course = course;
+	}
+
+	public void updateIntroduce(String introduce) {
+		this.introduce = introduce;
+	}
 }

src/main/java/kaboo/kaboo_auth/repository/MemberRepository.java

@@ -1,5 +1,6 @@
 package kaboo.kaboo_auth.repository;
 
+import java.util.List;
 import java.util.Optional;
 
 import org.springframework.data.jpa.repository.JpaRepository;
@@ -8,4 +9,8 @@
 
 public interface MemberRepository extends JpaRepository<Member, Long> {
 	Optional<Member> findByUsername(String username);
+
+	List<Member> findByClassNum(int classNum);
+
+	Optional<Member> findByKoreaName(String koreaName);
 }

src/main/java/kaboo/kaboo_auth/service/MemberService.java

@@ -1,7 +1,14 @@
 package kaboo.kaboo_auth.service;
 
+import java.util.List;
+
 import org.springframework.stereotype.Service;
 
+import kaboo.kaboo_auth.domain.dto.request.MemberInfoUpdateRequest;
+import kaboo.kaboo_auth.domain.dto.request.MemberIntroduceUpdateRequest;
+import kaboo.kaboo_auth.domain.dto.response.MemberInfoResponse;
+import kaboo.kaboo_auth.domain.dto.response.MemberIntroduceResponse;
+import kaboo.kaboo_auth.domain.dto.response.MemberListResponse;
 import kaboo.kaboo_auth.domain.entity.Member;
 import kaboo.kaboo_auth.repository.MemberRepository;
 import lombok.RequiredArgsConstructor;
@@ -16,4 +23,48 @@ public Member getMemberByUsername(String username) {
 				new IllegalStateException("존재하지 않는 ID 입니다.")
 		);
 	}
+
+	public MemberListResponse getAllMembers() {
+		List<Member> members = memberRepository.findAll();
+		return new MemberListResponse(members, 0);
+	}
+
+	public MemberListResponse getMembersByClassNum(int classNum) {
+		List<Member> members = memberRepository.findByClassNum(classNum);
+		return new MemberListResponse(members, classNum);
+	}
+
+	public MemberInfoResponse getMemberInfoByKoreaName(String koreaName) {
+		return new MemberInfoResponse(
+				memberRepository.findByKoreaName(koreaName)
+						.orElseThrow(() -> new IllegalStateException(koreaName + "을 찾을 수 없습니다. 다시 한번 확인해주세요.")));
+	}
+
+	public MemberInfoResponse updateMemberInfoByKoreaName(String koreaName, MemberInfoUpdateRequest request) {
+		Member member = memberRepository.findByKoreaName(koreaName)
+				.orElseThrow(() -> new IllegalStateException(koreaName + "을 찾을 수 없습니다. 다시 한번 확인해주세요."));
+
+		member.updateInfo(request.getKoreaName(), request.getEnglishName(), request.getClassNum(), request.getCourse());
+
+		memberRepository.save(member);
+
+		return new MemberInfoResponse(member);
+	}
+
+	public MemberIntroduceResponse getMemberIntroduceByKoreaName(String koreaName) {
+		return new MemberIntroduceResponse(
+				memberRepository.findByKoreaName(koreaName)
+						.orElseThrow(() -> new IllegalStateException(koreaName + "을 찾을 수 없습니다. 다시 한번 확인해주세요.")));
+	}
+
+	public MemberIntroduceResponse updateMemberIntroduceByKoreaName(String koreaName,
+			MemberIntroduceUpdateRequest request) {
+		Member member = memberRepository.findByKoreaName(koreaName)
+				.orElseThrow(() -> new IllegalStateException(koreaName + "을 찾을 수 없습니다. 다시 한번 확인해주세요."));
+		member.updateIntroduce(request.getIntroduce());
+
+		memberRepository.save(member);
+
+		return new MemberIntroduceResponse(member);
+	}
 }