refactor: studyMemberMapper 생성 및 매핑 코드 리팩토링

src/main/java/com/example/demo/config/MapperConfig.java

@@ -7,6 +7,7 @@
 import com.example.demo.mapper.CafeMapper;
 import com.example.demo.mapper.ReviewMapper;
 import com.example.demo.mapper.SnsDetailMapper;
+import com.example.demo.mapper.StudyMemberMapper;
 import com.example.demo.mapper.StudyOnceMapper;
 
 @Configuration
@@ -36,4 +37,9 @@ public SnsDetailMapper snsDetailMapper() {
 	public StudyOnceMapper studyOnceMapper() {
 		return new StudyOnceMapper();
 	}
+
+	@Bean
+	public StudyMemberMapper studyMemberMapper() {
+		return new StudyMemberMapper();
+	}
 }

src/main/java/com/example/demo/mapper/StudyMemberMapper.java

@@ -1,5 +1,20 @@
 package com.example.demo.mapper;
 
+import java.util.List;
+import java.util.stream.Collectors;
+
+import com.example.demo.domain.StudyMember;
+import com.example.demo.dto.MemberResponse;
+
 public class StudyMemberMapper {
 
+	public List<MemberResponse> toMemberResponses(List<StudyMember> studyMembers) {
+		return studyMembers.stream()
+			.map(studyMember -> new MemberResponse(
+				studyMember.getMember().getId(),
+				studyMember.getMember().getName(),
+				studyMember.getMember().getThumbnailImage().getThumbnailImage()))
+			.collect(Collectors.toList());
+	}
+
 }

src/main/java/com/example/demo/service/StudyOnceServiceImpl.java

@@ -27,6 +27,7 @@
 import com.example.demo.dto.UpdateAttendanceRequest;
 import com.example.demo.dto.UpdateAttendanceResponse;
 import com.example.demo.exception.CafegoryException;
+import com.example.demo.mapper.StudyMemberMapper;
 import com.example.demo.mapper.StudyOnceMapper;
 import com.example.demo.repository.MemberRepository;
 import com.example.demo.repository.StudyMemberRepository;
@@ -45,6 +46,7 @@ public class StudyOnceServiceImpl implements StudyOnceService {
 	private final MemberRepository memberRepository;
 	private final StudyMemberRepository studyMemberRepository;
 	private final StudyOnceMapper studyOnceMapper;
+	private final StudyMemberMapper studyMemberMapper;
 
 	@Override
 	public void tryJoin(long memberIdThatExpectedToJoin, long studyId) {
@@ -207,12 +209,7 @@ public Long changeCafe(Long requestMemberId, Long studyOnceId, final Long changi
 	@Override
 	public StudyMembersResponse findStudyMembersById(Long studyOnceId) {
 		StudyOnceImpl studyOnce = findStudyOnceById(studyOnceId);
-		List<MemberResponse> memberResponses = studyOnce.getStudyMembers().stream()
-			.map(studyMember -> new MemberResponse(
-				studyMember.getMember().getId(),
-				studyMember.getMember().getName(),
-				studyMember.getMember().getThumbnailImage().getThumbnailImage()))
-			.collect(Collectors.toList());
+		List<MemberResponse> memberResponses = studyMemberMapper.toMemberResponses(studyOnce.getStudyMembers());
 		return new StudyMembersResponse(memberResponses);
 	}