[Feature/389] 친구 삭제 API 구현 완료

application/external-api-v2/src/main/java/com/namo/spring/application/external/api/user/controller/FriendController.java

@@ -2,8 +2,8 @@
 
 import static com.namo.spring.core.common.code.status.ErrorStatus.*;
 
-import org.springframework.http.ResponseEntity;
 import org.springframework.security.core.annotation.AuthenticationPrincipal;
+import org.springframework.web.bind.annotation.DeleteMapping;
 import org.springframework.web.bind.annotation.GetMapping;
 import org.springframework.web.bind.annotation.PatchMapping;
 import org.springframework.web.bind.annotation.PathVariable;
@@ -115,4 +115,18 @@ public ResponseDto<String> toggleFavorite(@AuthenticationPrincipal SecurityUserD
         String message = isFavorite ? "친구를 즐겨찾기에 등록했습니다." : "친구를 즐겨찾기에서 해제했습니다.";
         return ResponseDto.onSuccess(message);
     }
+
+    @Operation(summary = "친구 삭제", description = "특정 친구를 삭제합니다.")
+    @ApiErrorCodes(value = {
+            NOT_FOUND_FRIENDSHIP_FAILURE,
+    })
+    @DeleteMapping("/{friendId}")
+    public ResponseDto<String> deleteFriend(
+            @AuthenticationPrincipal SecurityUserDetails member,
+            @Parameter(description = "삭제할 친구의 memberId를 입력해주세요", example = "1")
+            @PathVariable Long friendId
+    ){
+        friendUseCase.deleteFriend(member.getUserId(), friendId);
+        return ResponseDto.onSuccess("친구 삭제 완료");
+    }
 }

application/external-api-v2/src/main/java/com/namo/spring/application/external/api/user/service/FriendManageService.java

@@ -1,6 +1,8 @@
 package com.namo.spring.application.external.api.user.service;
 
 import java.time.LocalDate;
+import java.util.ArrayList;
+import java.util.Arrays;
 import java.util.List;
 
 import com.namo.spring.db.mysql.domains.schedule.exception.ScheduleException;
@@ -123,4 +125,13 @@ public Friendship getAcceptedFriendship(Long memberId, Long friendId){
         return friendshipService.readFriendshipByStatus(memberId, friendId, FriendshipStatus.ACCEPTED)
                 .orElseThrow(() -> new MemberException(ErrorStatus.NOT_FOUND_FRIENDSHIP_FAILURE));
     }
+
+    /**
+     * 친구 관계는 양방향으로 생성되기 때문에 양방향 입력을 받아 삭제처리 합니다.
+     * @param target
+     * @param reversedTarget
+     */
+    public void deleteFriendShip(Friendship target, Friendship reversedTarget) {
+        friendshipService.deleteAll(Arrays.asList(target, reversedTarget));
+    }
 }

application/external-api-v2/src/main/java/com/namo/spring/application/external/api/user/usecase/FriendUseCase.java

@@ -57,4 +57,11 @@ public boolean toggleFavorite(Long memberId, Long friendId) {
         friendship.toggleFavorite();
         return friendship.isFavorite();
     }
+
+    @Transactional
+    public void deleteFriend(Long memberId, Long friendId) {
+        Friendship target = friendManageService.getAcceptedFriendship(memberId, friendId);
+        Friendship reversedTarget = friendManageService.getAcceptedFriendship(friendId, memberId);
+        friendManageService.deleteFriendShip(target, reversedTarget);
+    }
 }

storage/db-mysql-v2/src/main/java/com/namo/spring/db/mysql/domains/user/service/FriendshipService.java

@@ -66,6 +66,10 @@ public void delete(Friendship friendship) {
         friendshipRepository.delete(friendship);
     }
 
+    public void deleteAll(List<Friendship> friendships){
+        friendshipRepository.deleteAll(friendships);
+    }
+
     /**
      * startDate부터 endDate까지의 날짜가 생일인
      * 친구의 정보와 생일을 조회합니다.