feat: updateNotification 자료형 Set으로 수정

Author: Soundbar91

src/main/java/in/koreatech/koin/domain/community/article/repository/ArticleRepository.java

@@ -4,6 +4,7 @@
 import static in.koreatech.koin.domain.community.article.service.ArticleService.NOTICE_BOARD_ID;
 
 import java.time.LocalDate;
+import java.util.Collection;
 import java.util.List;
 import java.util.Optional;
 
@@ -28,7 +29,7 @@ public interface ArticleRepository extends Repository<Article, Integer> {
 
     Optional<Article> findById(Integer articleId);
 
-    List<Article> findAllByIdIn(List<Integer> articleIds);
+    List<Article> findAllByIdIn(Collection<Integer> articleIds);
 
     Page<Article> findAll(Pageable pageable);
 

src/main/java/in/koreatech/koin/domain/community/keyword/dto/KeywordNotificationRequest.java

@@ -1,6 +1,6 @@
 package in.koreatech.koin.domain.community.keyword.dto;
 
-import java.util.List;
+import java.util.Set;
 
 import com.fasterxml.jackson.databind.PropertyNamingStrategies.SnakeCaseStrategy;
 import com.fasterxml.jackson.databind.annotation.JsonNaming;
@@ -9,10 +9,10 @@
 import jakarta.validation.constraints.NotNull;
 
 @JsonNaming(SnakeCaseStrategy.class)
-public record KeywordNotificationRequest (
+public record KeywordNotificationRequest(
     @Schema(description = "업데이트 된 공지사항 목록", example = "[1, 2, 3]")
     @NotNull
-    List<Integer> updateNotification
+    Set<Integer> updateNotification
 ) {
 
 }

src/main/java/in/koreatech/koin/domain/community/keyword/service/KeywordService.java

@@ -147,18 +147,14 @@ public ArticleKeywordsSuggestionResponse suggestKeywords() {
     }
 
     public void sendKeywordNotification(KeywordNotificationRequest request) {
-        List<Integer> updateNotificationIds = request.updateNotification().stream()
-            .distinct()
-            .toList();
-
-        if (updateNotificationIds.isEmpty()) {
+        if (request.updateNotification().isEmpty()) {
             return;
         }
 
-        List<Article> fetchedArticles = articleRepository.findAllByIdIn(updateNotificationIds);
+        List<Article> fetchedArticles = articleRepository.findAllByIdIn(request.updateNotification());
         var articleById = fetchedArticles.stream()
             .collect(Collectors.toMap(Article::getId, article -> article));
-        List<Article> articles = updateNotificationIds.stream()
+        List<Article> articles = request.updateNotification().stream()
             .map(articleId -> {
                 Article article = articleById.get(articleId);
                 if (article == null) {