feat: 밈 생성시 해시태그를 json 형식으로 저장한다

Author: NaMinhyeok

src/main/java/spring/memewikibe/application/MemeCreateService.java

@@ -6,6 +6,7 @@
 import org.springframework.transaction.annotation.Transactional;
 import org.springframework.web.multipart.MultipartFile;
 import spring.memewikibe.api.controller.meme.request.MemeCreateRequest;
+import spring.memewikibe.common.util.HashtagParser;
 import spring.memewikibe.domain.meme.Meme;
 import spring.memewikibe.domain.meme.MemeCategory;
 import spring.memewikibe.infrastructure.CategoryRepository;
@@ -27,29 +28,29 @@ public class MemeCreateService {
 
     public long createMeme(MemeCreateRequest request, MultipartFile imageFile) {
         String imageUrl = imageUploadService.uploadImage(imageFile);
-        
+
         Meme meme = Meme.builder()
-                .title(request.title())
-                .origin(request.origin())
-                .usageContext(request.usageContext())
-                .trendPeriod(request.trendPeriod())
-                .imgUrl(imageUrl)
-                .hashtags(request.hashtags())
-                .build();
-        
+            .title(request.title())
+            .origin(request.origin())
+            .usageContext(request.usageContext())
+            .trendPeriod(request.trendPeriod())
+            .imgUrl(imageUrl)
+            .hashtags(HashtagParser.toJson(request.hashtags()))
+            .build();
+
         Meme savedMeme = memeRepository.save(meme);
 
         Optional.ofNullable(request.categoryIds())
-                .filter(ids -> !ids.isEmpty())
-                .map(categoryRepository::findAllById)
-                .map(categories -> categories.stream()
-                        .map(category -> MemeCategory.builder()
-                                .meme(savedMeme)
-                                .category(category)
-                                .build())
-                        .toList())
-                .ifPresent(memeCategoryRepository::saveAll);
-        
+            .filter(ids -> !ids.isEmpty())
+            .map(categoryRepository::findAllById)
+            .map(categories -> categories.stream()
+                .map(category -> MemeCategory.builder()
+                    .meme(savedMeme)
+                    .category(category)
+                    .build())
+                .toList())
+            .ifPresent(memeCategoryRepository::saveAll);
+
         log.info("밈 생성 완료: {}", savedMeme.getId());
         return savedMeme.getId();
     }

src/main/java/spring/memewikibe/common/util/HashtagParser.java

@@ -22,4 +22,15 @@ public static List<String> parseHashtags(String hashtagsJson) {
             return Collections.emptyList();
         }
     }
+
+    public static String toJson(String hashtags) {
+        if (hashtags == null || hashtags.trim().isEmpty()) {
+            return "[]";
+        }
+        try {
+            return objectMapper.writeValueAsString(Collections.singletonList(hashtags));
+        } catch (JsonProcessingException e) {
+            return "[]";
+        }
+    }
 }

src/test/java/spring/memewikibe/common/util/HashtagParserTest.java

@@ -47,4 +47,13 @@ class HashtagParserTest {
 
         assertThat(result).isEmpty();
     }
+
+    @Test
+    void Json형식으로_변환한다() {
+        String hashtags = "#퀸은울지않아, #이효리, #화사, #댄스가수유랑단, #자존감, #명언, #걸크러쉬";
+
+        String result = HashtagParser.toJson(hashtags);
+
+        assertThat(result).isEqualTo("[\"#퀸은울지않아, #이효리, #화사, #댄스가수유랑단, #자존감, #명언, #걸크러쉬\"]");
+    }
 }