🔀 :: (#99) 팔로워 삭제 API

src/main/java/com/example/moizaspringserver/domain/follow/exception/NoSuchFollowerException.java

@@ -0,0 +1,12 @@
+package com.example.moizaspringserver.domain.follow.exception;
+
+import com.example.moizaspringserver.global.error.exception.CustomException;
+import com.example.moizaspringserver.global.error.exception.ErrorCode;
+
+public class NoSuchFollowerException extends CustomException {
+    public static final NoSuchFollowerException EXCEPTION = new NoSuchFollowerException();
+
+    private NoSuchFollowerException() {
+        super(ErrorCode.FOLLOW_NO_SUCH_FOLLOWER);
+    }
+}

src/main/java/com/example/moizaspringserver/domain/follow/presentation/FollowController.java

@@ -4,6 +4,7 @@
 import com.example.moizaspringserver.domain.follow.presentation.dto.response.GetAllFollowingResponse;
 import com.example.moizaspringserver.domain.follow.service.FollowEstablishService;
 import com.example.moizaspringserver.domain.follow.service.FollowQueryService;
+import com.example.moizaspringserver.domain.follow.service.FollowerDeleteService;
 import com.example.moizaspringserver.domain.follow.service.FollowerQueryService;
 import lombok.RequiredArgsConstructor;
 import org.springframework.http.HttpStatus;
@@ -18,6 +19,8 @@ public class FollowController {
     private final FollowerQueryService followerQueryService;
     private final FollowEstablishService followEstablishService;
 
+    private final FollowerDeleteService followerDeleteService;
+
     @ResponseStatus(HttpStatus.CREATED)
     @PostMapping("/{user-id}")
     public void addFollow(@PathVariable("user-id") Integer userId) {
@@ -33,4 +36,10 @@ public GetAllFollowingResponse getAllFollowing(@PathVariable("user-id") Integer
     public GetAllFollowerResponse getAllFollower(@PathVariable("user-id") Integer userId) {
         return followerQueryService.execute(userId);
     }
+
+    @ResponseStatus(HttpStatus.NO_CONTENT)
+    @DeleteMapping("/{user-id}/follower")
+    public void deleteFollower(@PathVariable("user-id") Integer userId) {
+        followerDeleteService.execute(userId);
+    }
 }

src/main/java/com/example/moizaspringserver/domain/follow/service/FollowerDeleteService.java

@@ -0,0 +1,28 @@
+package com.example.moizaspringserver.domain.follow.service;
+
+import com.example.moizaspringserver.domain.follow.entity.Follow;
+import com.example.moizaspringserver.domain.follow.exception.NoSuchFollowerException;
+import com.example.moizaspringserver.domain.follow.repository.FollowRepository;
+import com.example.moizaspringserver.domain.user.entity.User;
+import com.example.moizaspringserver.domain.user.facade.UserFacade;
+import lombok.RequiredArgsConstructor;
+import org.springframework.stereotype.Service;
+import org.springframework.transaction.annotation.Transactional;
+
+@RequiredArgsConstructor
+@Service
+public class FollowerDeleteService {
+    private final UserFacade userFacade;
+    private final FollowRepository followRepository;
+
+    @Transactional
+    public void execute(Integer followerIdToDelete) {
+        User queryUser = userFacade.queryCurrentUser();
+        User targetUser = userFacade.queryUserById(followerIdToDelete);
+
+        Follow followerRelation = followRepository.findByUserAndTargetUser(targetUser, queryUser)
+                .orElseThrow(() -> NoSuchFollowerException.EXCEPTION);
+
+        followRepository.delete(followerRelation);
+    }
+}

src/main/java/com/example/moizaspringserver/global/error/exception/ErrorCode.java

@@ -47,7 +47,8 @@ public enum ErrorCode {
     NOTICE_ATTACHMENT_FILE_NOT_FOUND(404, "Notice Attachment File Not Found" ),
 
 
-    FOLLOW_ALREADY_EXISTS(409, "Follow Already Exists");
+    FOLLOW_ALREADY_EXISTS(409, "Follow Already Exists"),
+    FOLLOW_NO_SUCH_FOLLOWER(404, "No such Follower");
 
 
     private final int status;

src/main/java/com/example/moizaspringserver/global/security/SecurityConfig.java

@@ -58,8 +58,9 @@ protected void configure(HttpSecurity http) throws Exception {
                 .antMatchers(HttpMethod.DELETE, "/notices/{notice-id}").hasAnyAuthority("ADMIN")
 
                 // follow
-                .antMatchers(HttpMethod.POST, "/follow/*").authenticated()
-                .antMatchers(HttpMethod.GET, "/following/*").authenticated()
+                .antMatchers(HttpMethod.POST, "/follow/{user-id}").authenticated()
+                .antMatchers(HttpMethod.GET, "/follow/following/{user-id}").authenticated()
+                .antMatchers(HttpMethod.DELETE, "/follow/{user-id}/follower").authenticated()
 
                 // feeds
                 .antMatchers(HttpMethod.DELETE, "/feeds/{feed-id}").authenticated()