feat(fantalk): 팬톡 작성 수정 응답을 반환한다

src/main/kotlin/kr/co/vividnext/sodalive/explorer/ExplorerService.kt

@@ -31,6 +31,7 @@ import kr.co.vividnext.sodalive.member.Member
 import kr.co.vividnext.sodalive.member.MemberRole
 import kr.co.vividnext.sodalive.member.MemberService
 import kr.co.vividnext.sodalive.member.contentpreference.MemberContentPreferenceService
+import kr.co.vividnext.sodalive.v2.api.creator.channel.fantalk.dto.CreatorChannelFanTalkResponse
 import org.springframework.beans.factory.annotation.Value
 import org.springframework.context.ApplicationEventPublisher
 import org.springframework.data.domain.Pageable
@@ -579,7 +580,7 @@ class ExplorerService(
     }
 
     @Transactional
-    fun writeCheers(request: PostWriteCheersRequest, member: Member) {
+    fun writeCheers(request: PostWriteCheersRequest, member: Member): CreatorChannelFanTalkResponse {
         val creator = queryRepository.getMember(request.creatorId)
             ?: throw SodaException(messageKey = "member.validation.user_not_found")
 
@@ -605,18 +606,20 @@ class ExplorerService(
             cheers.parent = parent
         }
 
-        cheersRepository.save(cheers)
+        val savedCheers = cheersRepository.save(cheers)
 
         // 언어 코드가 지정되지 않은 경우, 파파고 언어 감지 API를 통해 비동기로 언어를 식별한다.
         if (request.languageCode.isNullOrBlank()) {
             applicationEventPublisher.publishEvent(
                 LanguageDetectEvent(
-                    id = cheers.id!!,
+                    id = savedCheers.id!!,
                     query = request.content,
                     targetType = LanguageDetectTargetType.CREATOR_CHEERS
                 )
             )
         }
+
+        return CreatorChannelFanTalkResponse.from(savedCheers, cloudFrontHost)
     }
 
     fun getCreatorProfileCheers(
@@ -639,24 +642,29 @@ class ExplorerService(
     }
 
     @Transactional
-    fun modifyCheers(request: PutWriteCheersRequest, member: Member) {
+    fun modifyCheers(request: PutWriteCheersRequest, member: Member): CreatorChannelFanTalkResponse {
         val cheers = queryRepository.getCheers(request.cheersId)
             ?: throw SodaException(messageKey = "common.error.invalid_request")
+        val isWriter = cheers.member!!.id!! == member.id!!
+        val isCreator = cheers.creator!!.id!! == member.id!!
 
-        if (cheers.member!!.id!! == member.id!!) {
+        if (!isWriter && !isCreator) {
+            throw SodaException(messageKey = "common.error.invalid_request")
+        }
+
+        if (isWriter) {
             if (request.content != null) {
                 cheers.cheers = request.content
             }
         }
 
-        if (
-            cheers.creator!!.id!! == member.id!! ||
-            cheers.member!!.id!! == member.id!!
-        ) {
+        if (isCreator || isWriter) {
             if (request.isActive != null) {
                 cheers.isActive = request.isActive
             }
         }
+
+        return CreatorChannelFanTalkResponse.from(cheers, cloudFrontHost)
     }
 
     @Transactional