[refactor] 불변성 보장으로 변경 (#434)

src/main/java/org/sopt/app/application/playground/PlaygroundAuthService.java

@@ -4,6 +4,7 @@
 import static org.sopt.app.application.playground.PlaygroundHeaderCreator.createDefaultHeader;
 
 import io.jsonwebtoken.ExpiredJwtException;
+import jakarta.persistence.EntityNotFoundException;
 import java.net.URLEncoder;
 import java.nio.charset.StandardCharsets;
 import java.util.ArrayList;
@@ -219,23 +220,23 @@ public List<EmploymentPostResponse> getPlaygroundEmploymentPostWithMemberInfo(St
         return getPostsWithMemberInfo(playgroundToken, employmentPosts);
     }
 
-    private <T extends PostWithMemberInfo> void addMemberInfoToPost(T post, PlayGroundPostDetailResponse postDetail) {
+    private <T extends PostWithMemberInfo> T addMemberInfoToPost(T post, PlayGroundPostDetailResponse postDetail) {
         if (postDetail.member() != null) {
-            post.setProfileImage(postDetail.member().profileImage());
-            post.setName(postDetail.member().name());
+            return (T) post.withMemberDetail(postDetail.member().name(), postDetail.member().profileImage());
         } else if (postDetail.anonymousProfile() != null) {
-            post.setProfileImage(postDetail.anonymousProfile().profileImgUrl());
-            post.setName(postDetail.anonymousProfile().nickname());
+            return (T) post.withMemberDetail(postDetail.anonymousProfile().nickname(), postDetail.anonymousProfile().profileImgUrl());
         }
+        throw new EntityNotFoundException("Member not found");
     }
 
     private <T extends PostWithMemberInfo> List<T> getPostsWithMemberInfo(String playgroundToken, List<T> posts) {
         final Map<String, String> accessToken = createAuthorizationHeaderByUserPlaygroundToken(playgroundToken);
+        List<T> mutablePosts = new ArrayList<>();
         for (T post : posts) {
             Long postId = post.getId();
             PlayGroundPostDetailResponse postDetail = playgroundClient.getPlayGroundPostDetail(accessToken, postId);
-            addMemberInfoToPost(post, postDetail);
+            mutablePosts.add(addMemberInfoToPost(post, postDetail));
         }
-        return posts;
+        return mutablePosts;
     }
 }

src/main/java/org/sopt/app/application/playground/dto/PostWithMemberInfo.java

@@ -1,7 +1,6 @@
 package org.sopt.app.application.playground.dto;
 
 public interface PostWithMemberInfo {
-    void setProfileImage(String profileImage);
-    void setName(String name);
+    Object withMemberDetail(String name, String profileImage);
     Long getId();
 }

src/main/java/org/sopt/app/presentation/home/response/EmploymentPostResponse.java

@@ -1,21 +1,25 @@
 package org.sopt.app.presentation.home.response;
 
 import java.util.List;
+import lombok.AllArgsConstructor;
 import lombok.Builder;
 import lombok.Getter;
+import lombok.NoArgsConstructor;
 import org.sopt.app.application.playground.dto.PlayGroundEmploymentResponse.EmploymentPost;
 import org.sopt.app.application.playground.dto.PostWithMemberInfo;
 
 @Getter
 @Builder
+@AllArgsConstructor
+@NoArgsConstructor
 public class EmploymentPostResponse implements PostWithMemberInfo {
-    private final Long id;
-    private final String categoryName;
+    private Long id;
+    private String categoryName;
     private String profileImage;
     private String name;
-    private final String title;
-    private final String content;
-    private final List<String> images;
+    private String title;
+    private String content;
+    private List<String> images;
 
     public static EmploymentPostResponse of(EmploymentPost employmentPost) {
         return EmploymentPostResponse.builder()
@@ -27,13 +31,15 @@ public static EmploymentPostResponse of(EmploymentPost employmentPost) {
                 .build();
     }
 
-    @Override
-    public void setProfileImage(String profileImage) {
-        this.profileImage = profileImage;
-    }
-
-    @Override
-    public void setName(String name) {
-        this.name = name;
+    public EmploymentPostResponse withMemberDetail(String name, String profileImage) {
+        return EmploymentPostResponse.builder()
+                .id(this.id)
+                .categoryName(this.categoryName)
+                .name(name)
+                .profileImage(profileImage)
+                .title(this.title)
+                .content(this.content)
+                .images(this.images)
+                .build();
     }
 }

src/main/java/org/sopt/app/presentation/home/response/RecentPostsResponse.java

@@ -4,24 +4,23 @@
 import lombok.Builder;
 import lombok.Getter;
 import lombok.NoArgsConstructor;
-import lombok.Setter;
 import org.sopt.app.application.playground.dto.PlaygroundPostInfo.PlaygroundPostResponse;
 import org.sopt.app.application.playground.dto.PostWithMemberInfo;
 
 @Builder
-@NoArgsConstructor
 @AllArgsConstructor
 @Getter
+@NoArgsConstructor
 public class RecentPostsResponse implements PostWithMemberInfo {
-    @Setter
     private Long id;
     private String title;
     private String profileImage;
     private String name;
     private String category;
     private String content;
     private Boolean isHotPost;
-
+
+
     public static RecentPostsResponse of(PlaygroundPostResponse playgroundPostResponse) {
         return RecentPostsResponse.builder()
                 .id(playgroundPostResponse.postId())
@@ -32,13 +31,16 @@ public static RecentPostsResponse of(PlaygroundPostResponse playgroundPostRespon
                 .build();
     }
 
-    @Override
-    public void setProfileImage(String profileImage) {
-        this.profileImage = profileImage;
+    public RecentPostsResponse withMemberDetail(String name, String profileImage) {
+        return RecentPostsResponse.builder()
+                .id(this.id)
+                .title(this.title)
+                .profileImage(profileImage)
+                .name(name)
+                .category(this.category)
+                .content(this.content)
+                .isHotPost(this.isHotPost)
+                .build();
     }
 
-    @Override
-    public void setName(String name) {
-        this.name = name;
-    }
 }