[feat] #36 친구 삭제

Author: ehddbs4521

src/main/java/org/example/pay/global/exception/code/FriendErrorCode.java

@@ -0,0 +1,18 @@
+package org.example.pay.global.exception.code;
+
+import org.springframework.http.HttpStatus;
+
+import lombok.AllArgsConstructor;
+import lombok.Getter;
+
+@Getter
+@AllArgsConstructor
+public enum FriendErrorCode implements DefaultErrorCode{
+
+	//404 NOT_FOUND
+	FRIEND_NOT_FOUND(HttpStatus.NOT_FOUND, "해당 친구 관계가 존재하지 않습니다"),
+	;
+
+	private HttpStatus httpStatus;
+	private String message;
+}

src/main/java/org/example/pay/user/controller/UserController.java

@@ -60,8 +60,11 @@ public ResponseEntity<Void> addFriend(
     @ApiResponses(value = {
             @ApiResponse(responseCode = "204", description = "친구를 삭제했습니다."),
     })
-    @DeleteMapping("/add")
-    public ResponseEntity<Object> deleteFriend(@RequestBody DeleteFriendRequest deleteFriendRequest) {
+    @DeleteMapping()
+    public ResponseEntity<Object> deleteFriend(
+        @AuthenticationPrincipal CustomUserDetails customUserDetails,
+        @RequestBody DeleteFriendRequest deleteFriendRequest) {
+        userService.deleteFriend(deleteFriendRequest);
         return ResponseEntity.status(HttpStatus.NO_CONTENT).body(null);
     }
 }

src/main/java/org/example/pay/user/service/UserService.java

@@ -5,10 +5,12 @@
 import org.example.pay.global.dto.CursorPage;
 import org.example.pay.global.dto.CursorPageRequest;
 import org.example.pay.global.exception.PayException;
+import org.example.pay.global.exception.code.FriendErrorCode;
 import org.example.pay.global.exception.code.UserErrorCode;
 import org.example.pay.user.domain.Friend;
 import org.example.pay.user.domain.User;
 import org.example.pay.user.dto.request.AddFriendRequest;
+import org.example.pay.user.dto.request.DeleteFriendRequest;
 import org.example.pay.user.dto.response.FriendInfoListResponse;
 import org.example.pay.user.dto.response.FriendInfoResponse;
 import org.example.pay.user.repository.FriendRepository;
@@ -56,4 +58,12 @@ public void addFriend(Long userId, AddFriendRequest addFriendRequest) {
 		friendRepository.save(myFriend);
 		friendRepository.save(yourFriend);
 	}
+
+	@Transactional
+	public void deleteFriend(DeleteFriendRequest deleteFriendRequest) {
+		if (!friendRepository.existsById(deleteFriendRequest.friendId())) {
+			throw new PayException(FriendErrorCode.FRIEND_NOT_FOUND);
+		}
+		friendRepository.deleteById(deleteFriendRequest.friendId());
+	}
 }