Merge pull request #208 from JECT-Study/feature/slangcheck

Feature:SlangFilter 추가 닉네임에 욕설 유무 포함

Author: KII1ua

src/main/java/com/ject/vs/user/adapter/web/UserController.java

@@ -41,6 +41,11 @@ public ResponseEntity<NicknameCheckResponse> isUniqueNickname(@AuthenticationPri
         return ResponseEntity.ok(response);
     }
 
+    @PostMapping("/nickname/slang")
+    public ResponseEntity<NicknameCheckResponse> checkNicknameSlang(@AuthenticationPrincipal Long userId, @RequestBody UserNicknameRec nickname) {
+        return ResponseEntity.ok(userService.checkNicknameSlang(nickname.nickname(), userId));
+    }
+
     @Operation(summary = "닉네임 추천", description = "사용 가능한 랜덤 닉네임을 추천합니다.")
     @GetMapping("/nickname/suggest")
     public ResponseEntity<UserNicknameRec> suggestNickname(@AuthenticationPrincipal Long userId) {

src/main/java/com/ject/vs/user/domain/User.java

@@ -63,6 +63,10 @@ public void initializeDefault(String email, Year birthYear, Gender gender, Strin
         this.nickname = nickname;
     }
 
+    public static void modifyImageColor(User user, ImageColor imageColor) {
+        user.imageColor = imageColor;
+    }
+
     public static void modifyAccount(User user, String nickname, ImageColor imageColor) {
         user.nickname = nickname;
         user.imageColor = imageColor;

src/main/java/com/ject/vs/user/exception/UserErrorCode.java

@@ -9,7 +9,8 @@
 public enum UserErrorCode implements ErrorCode {
 
     USER_NOT_FOUND("E400000", "사용자 정보가 없습니다.", 404),
-    USER_NOT_REGISTER("E400001", "등록되지 않은 사용자입니다.", 404);
+    USER_NOT_REGISTER("E400001", "등록되지 않은 사용자입니다.", 404),
+    USER_NICKNAME_DUPLICATE("E400002", "중복된 닉네임입니다.", 404);
 
     private final String code;
     private final String message;

src/main/java/com/ject/vs/user/port/UserService.java

@@ -29,16 +29,18 @@ public User findOrCreate(String email) {
                 .orElseGet(() -> userRepository.save(User.createWithEmail(email)));
     }
 
-    public User findByEmail(String email) {
-        return userRepository.findByEmail(email)
+    public NicknameCheckResponse checkNickname(String nickName, Long userId) {
+        userRepository.findById(userId)
                 .orElseThrow(() -> new BusinessException(UserErrorCode.USER_NOT_FOUND));
+
+        return new NicknameCheckResponse(userRepository.isNicknameAvailable(nickName));
     }
 
-    public NicknameCheckResponse checkNickname(String nickName, Long userId) {
+    public NicknameCheckResponse checkNicknameSlang(String nickName, Long userId) {
         userRepository.findById(userId)
                 .orElseThrow(() -> new BusinessException(UserErrorCode.USER_NOT_FOUND));
 
-        return new NicknameCheckResponse(userRepository.isNicknameAvailable(nickName));
+        return new NicknameCheckResponse(!wordService.containSlang(nickName));
     }
 
     public UserProfileResponse setupAdditionalInfo(UserExtraInfo userInfo, Long userId) {
@@ -80,6 +82,15 @@ public UserMyPageResponse modifyInfo(Long userId, UserModifyInfoRequest req) {
         User user = userRepository.findById(userId)
                 .orElseThrow(() -> new BusinessException(UserErrorCode.USER_NOT_FOUND));
 
+        if(req.nickname().equals(user.getNickname())) {
+            User.modifyImageColor(user, req.imageColor());
+
+            return new UserMyPageResponse(user.getEmail(), user.getNickname(), user.getImageColor());
+        }
+        else if(!userRepository.isNicknameAvailable(req.nickname())) {
+            throw new BusinessException(UserErrorCode.USER_NICKNAME_DUPLICATE);
+        }
+
         User.modifyAccount(user, req.nickname(), req.imageColor());
 
         return new UserMyPageResponse(user.getEmail(), user.getNickname(), user.getImageColor());

src/main/java/com/ject/vs/user/port/WordService.java

@@ -1,6 +1,7 @@
 package com.ject.vs.user.port;
 
 import com.ject.vs.user.domain.UserRepository;
+import com.ject.vs.util.SlangFilter;
 import jakarta.annotation.PostConstruct;
 import lombok.RequiredArgsConstructor;
 import lombok.extern.slf4j.Slf4j;
@@ -28,12 +29,14 @@ public class WordService {
 
     private List<String> words2 = new ArrayList<>();
     private List<String> words3 = new ArrayList<>();
+    private List<String> slang = new ArrayList<>();
 
     @PostConstruct
     public void init() {
         try {
             words2 = loadWords("classpath:data/ko_words_2.txt");
             words3 = loadWords("classpath:data/ko_words_3.txt");
+            slang = loadWords("classpath:data/slang.txt");
         } catch (IOException e) {
             log.error("단어 로딩 실패", e);
         }
@@ -77,4 +80,8 @@ public String generateNickname() {
 
         return ret;
     }
+
+    public boolean containSlang(String input) {
+        return SlangFilter.containsSlang(input, slang);
+    }
 }

src/main/java/com/ject/vs/util/SlangFilter.java

@@ -0,0 +1,49 @@
+package com.ject.vs.util;
+
+import java.util.List;
+
+public class SlangFilter {
+    private static int[] buildFailure(char[] pattern) {
+        int m = pattern.length;
+        int[] fail = new int[m];
+        fail[0] = 0;
+        int j = 0;
+
+        for(int i = 1; i < m; i++) {
+            while(j > 0 && pattern[i] != pattern[j]) {
+                j = fail[j-1];
+            }
+            if(pattern[i] == pattern[j]) j++;
+            fail[i] = j;
+        }
+        return fail;
+    }
+
+    private static boolean kmpContains(char[] text, char[] pattern) {
+        int n = text.length;
+        int m = pattern.length;
+        if(m == 0) return false;
+
+        int[] fail = buildFailure(pattern);
+        int j = 0;
+
+        for(int i = 0; i < n; i++) {
+            while(j > 0 && text[i] != pattern[j]) {
+                j = fail[j-1];
+            }
+            if(text[i] == pattern[j]) j++;
+            if(j == m) return true;
+        }
+        return false;
+    }
+
+    public static boolean containsSlang(String input, List<String> slangList) {
+        if(input == null || input.isBlank()) return false;
+        char[] text = input.toCharArray();
+
+        for(String slang : slangList) {
+            if(kmpContains(text, slang.toCharArray())) return true;
+        }
+        return false;
+    }
+}