플레이 리스트 생성 API

- 기존: 플레이 리스트에 콘텐츠 ID만 저장됨
- 변경: 콘텐츠 ID와 정렬순서도 같이 저장됨

src/main/kotlin/kr/co/vividnext/sodalive/content/playlist/AudioContentPlaylist.kt

@@ -15,7 +15,7 @@ data class AudioContentPlaylist(
     val memberId: Long,
     var title: String,
     var desc: String? = null,
-    var contentIdList: MutableList<Long> = mutableListOf(),
+    var contentIdAndOrderList: MutableList<PlaylistContentIdAndOrder> = mutableListOf(),
 
     // ISO 8601 형식의 String
     private val _createdAt: String = LocalDateTime.now().format(DateTimeFormatter.ISO_LOCAL_DATE_TIME)

src/main/kotlin/kr/co/vividnext/sodalive/content/playlist/AudioContentPlaylistService.kt

@@ -16,7 +16,7 @@ class AudioContentPlaylistService(
     private val redisRepository: AudioContentPlaylistRedisRepository
 ) {
     fun createPlaylist(request: CreatePlaylistRequest, member: Member) {
-        if (request.contentIdList.size >= 30) {
+        if (request.contentIdAndOrderList.size >= 30) {
             throw SodaException("플레이 리스트에는 최대 30개의 콘텐츠를 저장할 수 있습니다.")
         }
 
@@ -27,7 +27,7 @@ class AudioContentPlaylistService(
 
         // 콘텐츠 유효성 검사 (소장으로 구매한 콘텐츠 인가?)
         checkOrderedContent(
-            contentIdList = request.contentIdList,
+            contentIdList = request.contentIdAndOrderList.map { it.contentId },
             memberId = member.id!!
         )
 
@@ -37,7 +37,7 @@ class AudioContentPlaylistService(
             title = request.title,
             desc = request.desc
         )
-        playlist.contentIdList.addAll(request.contentIdList)
+        playlist.contentIdAndOrderList.addAll(request.contentIdAndOrderList)
 
         redisRepository.save(playlist)
     }
@@ -58,9 +58,9 @@ class AudioContentPlaylistService(
         return GetPlaylistsResponse(
             totalCount = playlists.size,
             items = playlists.map {
-                val contentCount = it.contentIdList.size
+                val contentCount = it.contentIdAndOrderList.size
                 val coverImageUrl = if (contentCount > 0) {
-                    audioContentRepository.getCoverImageById(id = it.contentIdList[0])
+                    audioContentRepository.getCoverImageById(id = it.contentIdAndOrderList[0].contentId)
                         ?: ""
                 } else {
                     ""

src/main/kotlin/kr/co/vividnext/sodalive/content/playlist/CreatePlaylistRequest.kt

@@ -3,5 +3,5 @@ package kr.co.vividnext.sodalive.content.playlist
 data class CreatePlaylistRequest(
     val title: String,
     val desc: String? = null,
-    val contentIdList: List<Long> = emptyList()
+    val contentIdAndOrderList: List<PlaylistContentIdAndOrder> = emptyList()
 )

src/main/kotlin/kr/co/vividnext/sodalive/content/playlist/PlaylistContentIdAndOrder.kt

@@ -0,0 +1,6 @@
+package kr.co.vividnext.sodalive.content.playlist
+
+data class PlaylistContentIdAndOrder(
+    val contentId: Long,
+    val order: Int
+)