feat(character-comment): 캐릭터 댓글 등록 시 언어 코드가 null인 경우 파파고 언어 감지 API를 호출하는 기능 추가

src/main/kotlin/kr/co/vividnext/sodalive/content/LanguageDetectEvent.kt

@@ -1,5 +1,6 @@
 package kr.co.vividnext.sodalive.content
 
+import kr.co.vividnext.sodalive.chat.character.comment.CharacterCommentRepository
 import kr.co.vividnext.sodalive.content.comment.AudioContentCommentRepository
 import org.slf4j.LoggerFactory
 import org.springframework.beans.factory.annotation.Value
@@ -20,7 +21,8 @@ import org.springframework.web.client.RestTemplate
  */
 enum class LanguageDetectTargetType {
     CONTENT,
-    COMMENT
+    COMMENT,
+    CHARACTER_COMMENT
 }
 
 class LanguageDetectEvent(
@@ -38,6 +40,7 @@ data class PapagoLanguageDetectResponse(
 class LanguageDetectListener(
     private val audioContentRepository: AudioContentRepository,
     private val audioContentCommentRepository: AudioContentCommentRepository,
+    private val characterCommentRepository: CharacterCommentRepository,
 
     @Value("\${cloud.naver.papago-client-id}")
     private val papagoClientId: String,
@@ -64,6 +67,7 @@ class LanguageDetectListener(
         when (event.targetType) {
             LanguageDetectTargetType.CONTENT -> handleContentLanguageDetect(event)
             LanguageDetectTargetType.COMMENT -> handleCommentLanguageDetect(event)
+            LanguageDetectTargetType.CHARACTER_COMMENT -> handleCharacterCommentLanguageDetect(event)
         }
     }
 
@@ -139,6 +143,42 @@ class LanguageDetectListener(
         )
     }
 
+    private fun handleCharacterCommentLanguageDetect(event: LanguageDetectEvent) {
+        val commentId = event.commentId
+        if (commentId == null) {
+            log.warn("[PapagoLanguageDetect] commentId is null for CHARACTER_COMMENT target. event={}", event)
+            return
+        }
+
+        val comment = characterCommentRepository.findById(commentId).orElse(null)
+        if (comment == null) {
+            log.warn("[PapagoLanguageDetect] CharacterComment not found. commentId={}", commentId)
+            return
+        }
+
+        // 이미 언어 코드가 설정된 경우 호출하지 않음
+        if (!comment.languageCode.isNullOrBlank()) {
+            log.debug(
+                "[PapagoLanguageDetect] languageCode already set. Skip language detection. " +
+                    "characterCommentId={}, languageCode={}",
+                commentId,
+                comment.languageCode
+            )
+            return
+        }
+
+        val langCode = requestPapagoLanguageCode(event.query, commentId) ?: return
+
+        comment.languageCode = langCode
+        characterCommentRepository.save(comment)
+
+        log.info(
+            "[PapagoLanguageDetect] languageCode updated from Papago. characterCommentId={}, langCode={}",
+            commentId,
+            langCode
+        )
+    }
+
     private fun requestPapagoLanguageCode(query: String, targetIdForLog: Long): String? {
         return try {
             val headers = HttpHeaders().apply {