feat: 팔로잉 목록 조회 API 구현 (#71)

* style: Response 패키지 위치 변경 (#64)

* feat: 팔로잉 목록 조회 API 구현 (#64)

* style: UserRepository 패키지 구조 변경 (#64)

src/main/java/com/listywave/auth/application/service/AuthService.java

@@ -7,7 +7,7 @@
 import com.listywave.auth.infra.kakao.response.KakaoTokenResponse;
 import com.listywave.auth.presentation.dto.LoginResponse;
 import com.listywave.user.application.domain.User;
-import com.listywave.user.repository.UserRepository;
+import com.listywave.user.repository.user.UserRepository;
 import java.util.Optional;
 import lombok.RequiredArgsConstructor;
 import org.springframework.stereotype.Service;

src/main/java/com/listywave/common/util/UserUtil.java

@@ -3,7 +3,7 @@
 import com.listywave.common.exception.CustomException;
 import com.listywave.common.exception.ErrorCode;
 import com.listywave.user.application.domain.User;
-import com.listywave.user.repository.UserRepository;
+import com.listywave.user.repository.user.UserRepository;
 import lombok.RequiredArgsConstructor;
 import org.springframework.stereotype.Component;
 

src/main/java/com/listywave/list/application/service/CommentService.java

@@ -13,7 +13,7 @@
 import com.listywave.list.repository.ListRepository;
 import com.listywave.list.repository.ReplyRepository;
 import com.listywave.user.application.domain.User;
-import com.listywave.user.repository.UserRepository;
+import com.listywave.user.repository.user.UserRepository;
 import jakarta.transaction.Transactional;
 import java.util.LinkedHashMap;
 import java.util.List;
@@ -46,7 +46,7 @@ public CommentCreateResponse create(Long listId, String accessToken, String cont
     public CommentFindResponse getComments(Long listId, int size, Long cursorId) {
         Lists list = listRepository.getById(listId);
         Long totalCount = commentRepository.countByList(list);
-        
+
         List<Comment> comments = commentRepository.getComments(listId, size, cursorId);
 
         boolean hasNext = false;

src/main/java/com/listywave/list/application/service/ListService.java

@@ -12,7 +12,7 @@
 import com.listywave.list.presentation.dto.response.ListCreateResponse;
 import com.listywave.list.repository.ListRepository;
 import com.listywave.user.application.domain.User;
-import com.listywave.user.repository.UserRepository;
+import com.listywave.user.repository.user.UserRepository;
 import jakarta.transaction.Transactional;
 import java.util.List;
 import java.util.stream.Collectors;

src/main/java/com/listywave/list/application/service/ReplyService.java

@@ -10,7 +10,7 @@
 import com.listywave.list.repository.ListRepository;
 import com.listywave.list.repository.ReplyRepository;
 import com.listywave.user.application.domain.User;
-import com.listywave.user.repository.UserRepository;
+import com.listywave.user.repository.user.UserRepository;
 import lombok.RequiredArgsConstructor;
 import org.springframework.stereotype.Service;
 import org.springframework.transaction.annotation.Transactional;

src/main/java/com/listywave/user/application/domain/Follow.java

@@ -0,0 +1,28 @@
+package com.listywave.user.application.domain;
+
+import com.listywave.common.BaseEntity;
+import jakarta.persistence.Entity;
+import jakarta.persistence.FetchType;
+import jakarta.persistence.JoinColumn;
+import jakarta.persistence.ManyToOne;
+import lombok.AccessLevel;
+import lombok.AllArgsConstructor;
+import lombok.Builder;
+import lombok.Getter;
+import lombok.NoArgsConstructor;
+
+@Entity
+@Getter
+@Builder
+@AllArgsConstructor
+@NoArgsConstructor(access = AccessLevel.PROTECTED)
+public class Follow extends BaseEntity {
+
+    @ManyToOne(fetch = FetchType.LAZY)
+    @JoinColumn(name = "following_user_id")
+    private User followingUser;
+
+    @ManyToOne(fetch = FetchType.LAZY)
+    @JoinColumn(name = "follower_user_id")
+    private User followerUser;
+}

src/main/java/com/listywave/user/presentation/dto/response/AllUserListsResponse.java → src/main/java/com/listywave/user/application/dto/AllUserListsResponse.java

@@ -1,7 +1,6 @@
-package com.listywave.user.presentation.dto.response;
+package com.listywave.user.application.dto;
 
 import com.listywave.list.application.domain.Lists;
-import com.listywave.user.application.dto.FeedListsResponse;
 import java.util.List;
 
 public record AllUserListsResponse(

src/main/java/com/listywave/user/application/dto/FollowingsResponse.java

@@ -0,0 +1,37 @@
+package com.listywave.user.application.dto;
+
+import com.listywave.user.application.domain.User;
+import java.util.List;
+import lombok.Builder;
+
+public record FollowingsResponse(
+        List<FollowingUserInfo> followings
+) {
+
+    public static FollowingsResponse of(List<User> users) {
+        return new FollowingsResponse(FollowingUserInfo.toList(users));
+    }
+}
+
+@Builder
+record FollowingUserInfo(
+        Long id,
+        String nickname,
+        String profileImageUrl
+) {
+
+    public static List<FollowingUserInfo> toList(List<User> users) {
+        return users.stream()
+                .map(FollowingUserInfo::of)
+                .toList();
+    }
+
+    public static FollowingUserInfo of(User user) {
+        return FollowingUserInfo.builder()
+                .id(user.getId())
+                .nickname(user.getNickname())
+                .profileImageUrl(user.getProfileImageUrl())
+                .build();
+    }
+}
+

src/main/java/com/listywave/user/application/service/UserService.java

@@ -7,11 +7,14 @@
 import com.listywave.common.util.UserUtil;
 import com.listywave.list.application.domain.CategoryType;
 import com.listywave.list.application.domain.Lists;
+import com.listywave.user.application.domain.Follow;
 import com.listywave.user.application.domain.User;
+import com.listywave.user.application.dto.AllUserListsResponse;
 import com.listywave.user.application.dto.AllUserResponse;
+import com.listywave.user.application.dto.FollowingsResponse;
 import com.listywave.user.application.dto.UserInfoResponse;
-import com.listywave.user.presentation.dto.response.AllUserListsResponse;
-import com.listywave.user.repository.UserRepository;
+import com.listywave.user.repository.follow.FollowRepository;
+import com.listywave.user.repository.user.UserRepository;
 import java.util.List;
 import java.util.Optional;
 import lombok.RequiredArgsConstructor;
@@ -22,9 +25,10 @@
 @RequiredArgsConstructor
 public class UserService {
 
-    private final JwtManager jwtManager;
     private final UserUtil userUtil;
+    private final JwtManager jwtManager;
     private final UserRepository userRepository;
+    private final FollowRepository followRepository;
 
     @Transactional(readOnly = true)
     public UserInfoResponse getUserInfo(Long userId, String accessToken) {
@@ -42,7 +46,6 @@ public UserInfoResponse getUserInfo(Long userId, String accessToken) {
         return UserInfoResponse.of(foundUser, false, false);
     }
 
-
     private boolean isSignedIn(String accessToken) {
         return accessToken.isBlank();
     }
@@ -75,4 +78,15 @@ public AllUserResponse getAllUser() {
         List<User> allUser = userRepository.findAll();
         return AllUserResponse.of(allUser);
     }
+
+    public FollowingsResponse getFollowings(String accessToken) {
+        Long loginUserId = jwtManager.read(accessToken);
+        User user = userRepository.getById(loginUserId);
+        List<Follow> follows = followRepository.getAllByFollowerUser(user);
+
+        List<User> followingUsers = follows.stream()
+                .map(Follow::getFollowingUser)
+                .toList();
+        return FollowingsResponse.of(followingUsers);
+    }
 }

src/main/java/com/listywave/user/presentation/UserController.java

@@ -1,10 +1,13 @@
 package com.listywave.user.presentation;
 
+import static org.springframework.http.HttpHeaders.AUTHORIZATION;
+
 import com.listywave.list.application.domain.CategoryType;
+import com.listywave.user.application.dto.AllUserListsResponse;
 import com.listywave.user.application.dto.AllUserResponse;
+import com.listywave.user.application.dto.FollowingsResponse;
 import com.listywave.user.application.dto.UserInfoResponse;
 import com.listywave.user.application.service.UserService;
-import com.listywave.user.presentation.dto.response.AllUserListsResponse;
 import lombok.RequiredArgsConstructor;
 import org.springframework.http.ResponseEntity;
 import org.springframework.web.bind.annotation.GetMapping;
@@ -22,7 +25,7 @@ public class UserController {
     @GetMapping("/users/{userId}")
     ResponseEntity<UserInfoResponse> getUserInfo(
             @PathVariable(value = "userId") Long userId,
-            @RequestHeader(value = "Authorization", defaultValue = "") String accessToken
+            @RequestHeader(value = AUTHORIZATION, defaultValue = "") String accessToken
     ) {
         UserInfoResponse userInfoResponse = userService.getUserInfo(userId, accessToken);
         return ResponseEntity.ok(userInfoResponse);
@@ -45,4 +48,10 @@ ResponseEntity<AllUserListsResponse> getAllUserLists(
         AllUserListsResponse allUserListsResponse = userService.getAllListOfUser(userId, type, category, cursorId, size);
         return ResponseEntity.ok(allUserListsResponse);
     }
+
+    @GetMapping("/followings")
+    ResponseEntity<FollowingsResponse> getFollowings(@RequestHeader(value = AUTHORIZATION) String accessToken) {
+        FollowingsResponse response = userService.getFollowings(accessToken);
+        return ResponseEntity.ok(response);
+    }
 }

src/main/java/com/listywave/user/repository/follow/FollowRepository.java

@@ -0,0 +1,11 @@
+package com.listywave.user.repository.follow;
+
+import com.listywave.user.application.domain.Follow;
+import com.listywave.user.application.domain.User;
+import java.util.List;
+import org.springframework.data.jpa.repository.JpaRepository;
+
+public interface FollowRepository extends JpaRepository<Follow, Long> {
+
+    List<Follow> getAllByFollowerUser(User user);
+}

src/main/java/com/listywave/user/repository/UserRepository.java → src/main/java/com/listywave/user/repository/user/UserRepository.java

@@ -1,14 +1,14 @@
-package com.listywave.user.repository;
+package com.listywave.user.repository.user;
 
 import static com.listywave.common.exception.ErrorCode.NOT_FOUND;
 
 import com.listywave.common.exception.CustomException;
 import com.listywave.user.application.domain.User;
-import com.listywave.user.repository.custom.UserRepositoryCustom;
+import com.listywave.user.repository.user.custom.CustomUserRepository;
 import java.util.Optional;
 import org.springframework.data.jpa.repository.JpaRepository;
 
-public interface UserRepository extends JpaRepository<User, Long>, UserRepositoryCustom {
+public interface UserRepository extends JpaRepository<User, Long>, CustomUserRepository {
 
     Optional<User> findByOauthId(Long oauthId);
 

src/main/java/com/listywave/user/repository/custom/UserRepositoryCustom.java → src/main/java/com/listywave/user/repository/user/custom/CustomUserRepository.java

@@ -1,10 +1,10 @@
-package com.listywave.user.repository.custom;
+package com.listywave.user.repository.user.custom;
 
 import com.listywave.list.application.domain.CategoryType;
 import com.listywave.list.application.domain.Lists;
 import java.util.List;
 
-public interface UserRepositoryCustom {
+public interface CustomUserRepository {
 
     List<Lists> findFeedLists(Long userId, String type, CategoryType category, Long cursorId, int size);
 }

src/main/java/com/listywave/user/repository/custom/impl/UserRepositoryImpl.java → src/main/java/com/listywave/user/repository/user/custom/impl/CustomUserRepositoryImpl.java

@@ -1,18 +1,18 @@
-package com.listywave.user.repository.custom.impl;
+package com.listywave.user.repository.user.custom.impl;
 
 import static com.listywave.list.application.domain.QItem.item;
 import static com.listywave.list.application.domain.QLists.lists;
 
 import com.listywave.list.application.domain.CategoryType;
 import com.listywave.list.application.domain.Lists;
-import com.listywave.user.repository.custom.UserRepositoryCustom;
+import com.listywave.user.repository.user.custom.CustomUserRepository;
 import com.querydsl.core.types.dsl.BooleanExpression;
 import com.querydsl.jpa.impl.JPAQueryFactory;
 import java.util.List;
 import lombok.RequiredArgsConstructor;
 
 @RequiredArgsConstructor
-public class UserRepositoryImpl implements UserRepositoryCustom {
+public class CustomUserRepositoryImpl implements CustomUserRepository {
 
     private final JPAQueryFactory queryFactory;