feat: 닉네임 유효성 검증 API 구현

src/main/java/com/listywave/common/auth/AuthorizationInterceptor.java

@@ -37,7 +37,8 @@ public class AuthorizationInterceptor implements HandlerInterceptor {
             new UriAndMethod("/categories", GET),
             new UriAndMethod("/users/basic-profile-image", GET),
             new UriAndMethod("/users/basic-background-image", GET),
-            new UriAndMethod("/topics", GET)
+            new UriAndMethod("/topics", GET),
+            new UriAndMethod("/users/nickname-validate", GET)
     };
 
     private final JwtManager jwtManager;

src/main/java/com/listywave/user/application/service/UserService.java

@@ -17,6 +17,7 @@
 import com.listywave.user.application.dto.search.UserElasticSearchResponse;
 import com.listywave.user.application.dto.search.UserSearchResponse;
 import com.listywave.user.application.dto.search.UserSearchResult;
+import com.listywave.user.application.vo.Nickname;
 import com.listywave.user.repository.follow.FollowRepository;
 import com.listywave.user.repository.user.UserRepository;
 import com.listywave.user.repository.user.elastic.UserElasticRepository;
@@ -190,4 +191,8 @@ public UserElasticSearchResponse searchUserByElastic(@Nullable Long loginUserId,
     public User getById(Long userId) {
         return userRepository.getById(userId);
     }
+
+    public void validateNickname(String nickname) {
+        Nickname.of(nickname);
+    }
 }

src/main/java/com/listywave/user/application/vo/Nickname.java

@@ -9,6 +9,7 @@
 import jakarta.persistence.Column;
 import jakarta.persistence.Embeddable;
 import java.util.Locale;
+import java.util.Optional;
 import java.util.Set;
 import lombok.AccessLevel;
 import lombok.EqualsAndHashCode;
@@ -69,10 +70,11 @@ private static void validateWord(String value) {
 
     private static void validateRelatedWithAdmin(String value) {
         value = value.toLowerCase(Locale.ENGLISH);
-        for (String word : BLACK_LIST) {
-            if (value.contains(word)) {
-                throw new CustomException(ILLEGAL_NICKNAME_EXCEPTION);
-            }
+        Optional<String> result = BLACK_LIST.stream()
+                .filter(value::contains)
+                .findAny();
+        if (result.isPresent()) {
+            throw new CustomException(ILLEGAL_NICKNAME_EXCEPTION);
         }
     }
 }

src/main/java/com/listywave/user/presentation/UserController.java

@@ -130,4 +130,10 @@ ResponseEntity<UserElasticSearchResponse> searchUserByElastic(
         UserElasticSearchResponse response = userService.searchUserByElastic(loginUserId, keyword, pageable);
         return ResponseEntity.ok(response);
     }
+
+    @GetMapping("/users/nickname-validate")
+    ResponseEntity<Void> validateNickname(@RequestParam(value = "nickname") String nickname) {
+        userService.validateNickname(nickname);
+        return ResponseEntity.ok().build();
+    }
 }