[FEAT] 팔로우 취소 API 개발

src/main/java/team/wego/wegobackend/common/exception/AppErrorCode.java

@@ -27,8 +27,10 @@ public enum AppErrorCode implements ErrorCode {
     INVALID_PASSWORD_VALUE(HttpStatus.BAD_REQUEST, "회원 : 비밀번호가 일치하지 않습니다."),
     DELETED_USER(HttpStatus.BAD_REQUEST, "회원 : 탈퇴한 회원입니다."),
     NOT_SAME_FOLLOW(HttpStatus.BAD_REQUEST, "회원 : 자기 자신을 팔로우할 수 없습니다."),
+    NOT_SAME_UNFOLLOW(HttpStatus.BAD_REQUEST, "회원 : 팔로우 취소 대상은 본인 될 수 없습니다."),
     ALREADY_EXIST_FOLLOW(HttpStatus.BAD_REQUEST, "회원 : 이미 팔로우 중입니다."),
     ALREADY_EXIST_NICKNAME(HttpStatus.BAD_REQUEST, "회원 : 이미 존재하는 닉네임입니다."),
+    NOT_FOUND_FOLLOW(HttpStatus.BAD_REQUEST, "회원 : 팔로우 관계를 찾을 수 없습니다."),
 
     EXPIRED_TOKEN(HttpStatus.UNAUTHORIZED, "인증 : 만료된 토큰입니다."),
     INVALID_TOKEN(HttpStatus.UNAUTHORIZED, "인증 : 유효하지 않은 토큰입니다.")

src/main/java/team/wego/wegobackend/user/application/FollowService.java

@@ -4,9 +4,12 @@
 import lombok.extern.slf4j.Slf4j;
 import org.springframework.stereotype.Service;
 import org.springframework.transaction.annotation.Transactional;
+import team.wego.wegobackend.user.domain.Follow;
 import team.wego.wegobackend.user.domain.User;
 import team.wego.wegobackend.user.exception.ExistFollowException;
+import team.wego.wegobackend.user.exception.NotFoundFollowException;
 import team.wego.wegobackend.user.exception.SameFollowException;
+import team.wego.wegobackend.user.exception.SameUnFollowException;
 import team.wego.wegobackend.user.exception.UserNotFoundException;
 import team.wego.wegobackend.user.repository.FollowRepository;
 import team.wego.wegobackend.user.repository.UserRepository;
@@ -35,5 +38,28 @@ public void follow(String followNickname, Long followerId) {
         if (followRepository.existsByFollowerIdAndFolloweeId(followerId, follow.getId())) {
             throw new ExistFollowException();
         }
+
+        followRepository.save(Follow.builder()
+            .follower(follower)
+            .follow(follow)
+            .build());
+    }
+
+    public void unFollow(String unFollowNickname, Long followerId) {
+        User follower = userRepository.findById(followerId)
+            .orElseThrow(UserNotFoundException::new);
+
+        if (unFollowNickname.equals(follower.getNickName())) {
+            throw new SameUnFollowException();
+        }
+
+        User follow = userRepository.findByNickName(unFollowNickname)
+            .orElseThrow(UserNotFoundException::new);
+
+        Follow followEntity = followRepository.findByFollowerIdAndFolloweeId(followerId,
+                follow.getId())
+            .orElseThrow(NotFoundFollowException::new);
+
+        followRepository.delete(followEntity);
     }
 }

src/main/java/team/wego/wegobackend/user/application/UserService.java

@@ -47,7 +47,7 @@ public UserInfoResponse updateProfileInfo(Long userId, ProfileUpdateRequest requ
 
         User user = userRepository.findById(userId).orElseThrow(UserNotFoundException::new);
 
-        if (request.getNickName() != null) {
+        if (request.getNickName() != null && !request.getNickName().equals(user.getNickName())) {
             boolean isExistNickname = userRepository.existsByNickName(request.getNickName());
             if (isExistNickname) {
                 throw new SameNicknameException();

src/main/java/team/wego/wegobackend/user/exception/NotFoundFollowException.java

@@ -0,0 +1,11 @@
+package team.wego.wegobackend.user.exception;
+
+import team.wego.wegobackend.common.exception.AppErrorCode;
+import team.wego.wegobackend.common.exception.AppException;
+
+public class NotFoundFollowException extends AppException {
+
+    public NotFoundFollowException() {
+        super(AppErrorCode.NOT_FOUND_FOLLOW);
+    }
+}

src/main/java/team/wego/wegobackend/user/exception/SameUnFollowException.java

@@ -0,0 +1,11 @@
+package team.wego.wegobackend.user.exception;
+
+import team.wego.wegobackend.common.exception.AppErrorCode;
+import team.wego.wegobackend.common.exception.AppException;
+
+public class SameUnFollowException extends AppException {
+
+    public SameUnFollowException() {
+        super(AppErrorCode.NOT_SAME_UNFOLLOW);
+    }
+}

src/main/java/team/wego/wegobackend/user/presentation/UserController.java

@@ -114,6 +114,17 @@ public ResponseEntity<ApiResponse<String>> follow(
     }
 
     //TODO : 팔로우 삭제 API
+    @DeleteMapping("/unfollow")
+    public ResponseEntity<ApiResponse<String>> unFollow(
+        @AuthenticationPrincipal CustomUserDetails userDetails,
+        @Valid @RequestParam("unFollowNickname") String unFollowNickname
+    ) {
+        followService.unFollow(unFollowNickname, userDetails.getId());
+
+        return ResponseEntity
+            .status(HttpStatus.CREATED)
+            .body(ApiResponse.success(201, "팔로우 취소 성공"));
+    }
 
     //TODO : 팔로우 목록 조회 API
 

src/main/java/team/wego/wegobackend/user/presentation/UserControllerDocs.java

@@ -43,9 +43,15 @@ ResponseEntity<ApiResponse<UserInfoResponse>> changeNotificationConfig(
         @RequestParam(required = true) Boolean isNotificationEnabled
     );
 
-    @Operation(summary = "팔로우 등록 API", description = "요청 ID에 해당하는 사용자를 팔로우합니다.")
+    @Operation(summary = "팔로우 등록 API", description = "요청 닉네임에 해당하는 사용자를 팔로우합니다.")
     ResponseEntity<ApiResponse<String>> follow(
         @AuthenticationPrincipal CustomUserDetails userDetails,
         @Valid @RequestParam("followNickname") String followNickname
     );
+
+    @Operation(summary = "팔로우 취소 API", description = "요청 닉네임에 해당하는 사용자를 팔로우 취소합니다.")
+    ResponseEntity<ApiResponse<String>> unFollow(
+        @AuthenticationPrincipal CustomUserDetails userDetails,
+        @Valid @RequestParam("unFollowNickname") String unFollowNickname
+    );
 }

src/main/java/team/wego/wegobackend/user/repository/FollowRepository.java

@@ -1,9 +1,11 @@
 package team.wego.wegobackend.user.repository;
 
+import java.util.Optional;
 import org.springframework.data.jpa.repository.JpaRepository;
 import team.wego.wegobackend.user.domain.Follow;
 
 public interface FollowRepository extends JpaRepository<Follow, Long> {
 
+    Optional<Follow> findByFollowerIdAndFolloweeId(Long followerId, Long followingId);
     boolean existsByFollowerIdAndFolloweeId(Long followerId, Long followingId);
 }

src/test/http/user/user-api.http

@@ -66,3 +66,7 @@ Content-Type: application/json
 ### 팔로우 요청
 POST http://localhost:8080/api/v1/users/follow?followNickname=팔로우 대상
 Authorization: Bearer {{accessToken}}
+
+### 팔로우 취소
+DELETE http://localhost:8080/api/v1/users/unfollow?unFollowNickname=예은
+Authorization: Bearer {{accessToken}}