feat(community): 게시물 상세 응답 모델을 추가한다

src/main/kotlin/kr/co/vividnext/sodalive/v2/api/creator/channel/community/dto/CreatorChannelCommunityPostDetailResponse.kt

@@ -0,0 +1,139 @@
+package kr.co.vividnext.sodalive.v2.api.creator.channel.community.dto
+
+import com.fasterxml.jackson.annotation.JsonProperty
+import kr.co.vividnext.sodalive.extensions.toUtcIso
+import kr.co.vividnext.sodalive.v2.creator.channel.community.domain.CreatorChannelCommunityComment
+import kr.co.vividnext.sodalive.v2.creator.channel.community.domain.CreatorChannelCommunityComments
+import kr.co.vividnext.sodalive.v2.creator.channel.community.domain.CreatorChannelCommunityPostDetail
+import kr.co.vividnext.sodalive.v2.creator.channel.community.domain.CreatorChannelCommunityReplies
+import kr.co.vividnext.sodalive.v2.creator.channel.community.domain.CreatorChannelCommunityReply
+
+data class CreatorChannelCommunityPostDetailResponse(
+    val postId: Long,
+    val creatorId: Long,
+    val creatorNickname: String,
+    val creatorProfileUrl: String,
+    val createdAtUtc: String,
+    val content: String,
+    val imageUrl: String?,
+    val audioUrl: String?,
+    val price: Int,
+    @JsonProperty("isCommentAvailable")
+    val isCommentAvailable: Boolean,
+    val existOrdered: Boolean,
+    val likeCount: Int,
+    val commentCount: Int,
+    @JsonProperty("isPinned")
+    val isPinned: Boolean,
+    @JsonProperty("isLiked")
+    val isLiked: Boolean,
+    val comments: CreatorChannelCommunityCommentsResponse
+) {
+    companion object {
+        fun from(detail: CreatorChannelCommunityPostDetail): CreatorChannelCommunityPostDetailResponse {
+            val post = detail.post
+            return CreatorChannelCommunityPostDetailResponse(
+                postId = post.postId,
+                creatorId = post.creatorId,
+                creatorNickname = post.creatorNickname,
+                creatorProfileUrl = post.creatorProfileUrl,
+                createdAtUtc = post.createdAt.toUtcIso(),
+                content = post.content,
+                imageUrl = post.imageUrl,
+                audioUrl = post.audioUrl,
+                price = post.price,
+                isCommentAvailable = post.isCommentAvailable,
+                existOrdered = post.existOrdered,
+                likeCount = post.likeCount,
+                commentCount = post.commentCount,
+                isPinned = post.isPinned,
+                isLiked = post.isLiked,
+                comments = CreatorChannelCommunityCommentsResponse.from(detail.comments)
+            )
+        }
+    }
+}
+
+data class CreatorChannelCommunityCommentsResponse(
+    val commentCount: Int,
+    val comments: List<CreatorChannelCommunityCommentResponse>,
+    val page: Int,
+    val size: Int,
+    @JsonProperty("hasNext")
+    val hasNext: Boolean
+) {
+    companion object {
+        fun from(comments: CreatorChannelCommunityComments): CreatorChannelCommunityCommentsResponse {
+            return CreatorChannelCommunityCommentsResponse(
+                commentCount = comments.commentCount,
+                comments = comments.comments.map(CreatorChannelCommunityCommentResponse::from),
+                page = comments.page.page,
+                size = comments.page.size,
+                hasNext = comments.hasNext
+            )
+        }
+    }
+}
+
+data class CreatorChannelCommunityCommentResponse(
+    val commentId: Long,
+    val writerProfileImageUrl: String,
+    val writerNickname: String,
+    val content: String,
+    val createdAtUtc: String,
+    val latestReply: CreatorChannelCommunityReplyResponse?
+) {
+    companion object {
+        fun from(comment: CreatorChannelCommunityComment): CreatorChannelCommunityCommentResponse {
+            return CreatorChannelCommunityCommentResponse(
+                commentId = comment.commentId,
+                writerProfileImageUrl = comment.writerProfileImageUrl,
+                writerNickname = comment.writerNickname,
+                content = comment.content,
+                createdAtUtc = comment.createdAt.toUtcIso(),
+                latestReply = comment.latestReply?.let(CreatorChannelCommunityReplyResponse::from)
+            )
+        }
+    }
+}
+
+data class CreatorChannelCommunityRepliesResponse(
+    val replyCount: Int,
+    val replies: List<CreatorChannelCommunityReplyResponse>,
+    val page: Int,
+    val size: Int,
+    @JsonProperty("hasNext")
+    val hasNext: Boolean
+) {
+    companion object {
+        fun from(replies: CreatorChannelCommunityReplies): CreatorChannelCommunityRepliesResponse {
+            return CreatorChannelCommunityRepliesResponse(
+                replyCount = replies.replyCount,
+                replies = replies.replies.map(CreatorChannelCommunityReplyResponse::from),
+                page = replies.page.page,
+                size = replies.page.size,
+                hasNext = replies.hasNext
+            )
+        }
+    }
+}
+
+data class CreatorChannelCommunityReplyResponse(
+    val commentId: Long,
+    val writerProfileImageUrl: String,
+    val writerNickname: String,
+    val content: String,
+    val createdAtUtc: String
+) {
+    companion object {
+        fun from(reply: CreatorChannelCommunityReply): CreatorChannelCommunityReplyResponse {
+            return CreatorChannelCommunityReplyResponse(
+                commentId = reply.commentId,
+                writerProfileImageUrl = reply.writerProfileImageUrl,
+                writerNickname = reply.writerNickname,
+                content = reply.content,
+                createdAtUtc = reply.createdAt.toUtcIso()
+            )
+        }
+    }
+}

src/main/kotlin/kr/co/vividnext/sodalive/v2/creator/channel/community/domain/CreatorChannelCommunityPostDetail.kt

@@ -0,0 +1,40 @@
+package kr.co.vividnext.sodalive.v2.creator.channel.community.domain
+
+import kr.co.vividnext.sodalive.v2.creator.channel.live.domain.CreatorChannelPage
+import java.time.LocalDateTime
+
+data class CreatorChannelCommunityPostDetail(
+    val post: CreatorChannelCommunityPost,
+    val comments: CreatorChannelCommunityComments
+)
+
+data class CreatorChannelCommunityComments(
+    val commentCount: Int,
+    val comments: List<CreatorChannelCommunityComment>,
+    val page: CreatorChannelPage,
+    val hasNext: Boolean
+)
+
+data class CreatorChannelCommunityComment(
+    val commentId: Long,
+    val writerProfileImageUrl: String,
+    val writerNickname: String,
+    val content: String,
+    val createdAt: LocalDateTime,
+    val latestReply: CreatorChannelCommunityReply?
+)
+
+data class CreatorChannelCommunityReplies(
+    val replyCount: Int,
+    val replies: List<CreatorChannelCommunityReply>,
+    val page: CreatorChannelPage,
+    val hasNext: Boolean
+)
+
+data class CreatorChannelCommunityReply(
+    val commentId: Long,
+    val writerProfileImageUrl: String,
+    val writerNickname: String,
+    val content: String,
+    val createdAt: LocalDateTime
+)

src/test/kotlin/kr/co/vividnext/sodalive/v2/api/creator/channel/community/dto/CreatorChannelCommunityPostDetailResponseTest.kt

@@ -0,0 +1,99 @@
+package kr.co.vividnext.sodalive.v2.api.creator.channel.community.dto
+
+import com.fasterxml.jackson.databind.ObjectMapper
+import com.fasterxml.jackson.module.kotlin.KotlinModule
+import kr.co.vividnext.sodalive.v2.creator.channel.community.domain.CreatorChannelCommunityComment
+import kr.co.vividnext.sodalive.v2.creator.channel.community.domain.CreatorChannelCommunityComments
+import kr.co.vividnext.sodalive.v2.creator.channel.community.domain.CreatorChannelCommunityPost
+import kr.co.vividnext.sodalive.v2.creator.channel.community.domain.CreatorChannelCommunityPostDetail
+import kr.co.vividnext.sodalive.v2.creator.channel.community.domain.CreatorChannelCommunityReplies
+import kr.co.vividnext.sodalive.v2.creator.channel.community.domain.CreatorChannelCommunityReply
+import kr.co.vividnext.sodalive.v2.creator.channel.live.domain.CreatorChannelPage
+import org.junit.jupiter.api.Assertions.assertFalse
+import org.junit.jupiter.api.Assertions.assertTrue
+import org.junit.jupiter.api.DisplayName
+import org.junit.jupiter.api.Test
+import java.time.LocalDateTime
+
+class CreatorChannelCommunityPostDetailResponseTest {
+    @Test
+    @DisplayName("상세 응답 DTO는 is prefix boolean 필드명과 댓글/답글 구조를 유지한다")
+    fun shouldSerializeBooleanFieldsWithIsPrefixAndReuseCommentsResponse() {
+        val mapper = ObjectMapper().registerModule(KotlinModule.Builder().build())
+        val response = CreatorChannelCommunityPostDetailResponse.from(createDetail())
+        val replies = CreatorChannelCommunityRepliesResponse.from(createReplies())
+
+        val detailJson = mapper.readTree(mapper.writeValueAsString(response))
+        val repliesJson = mapper.readTree(mapper.writeValueAsString(replies))
+
+        assertTrue(detailJson["isCommentAvailable"].asBoolean())
+        assertTrue(detailJson["isPinned"].asBoolean())
+        assertTrue(detailJson["isLiked"].asBoolean())
+        assertTrue(detailJson["comments"]["hasNext"].asBoolean())
+        assertTrue(detailJson["comments"]["comments"][0].has("latestReply"))
+        assertTrue(detailJson["comments"]["comments"][0]["latestReply"].has("commentId"))
+        assertTrue(repliesJson["hasNext"].asBoolean())
+        assertFalse(repliesJson["replies"][0].has("latestReply"))
+    }
+
+    private fun createDetail(): CreatorChannelCommunityPostDetail {
+        val reply = CreatorChannelCommunityReply(
+            commentId = 2L,
+            writerProfileImageUrl = "https://cdn.test/reply.png",
+            writerNickname = "reply-writer",
+            content = "reply",
+            createdAt = LocalDateTime.of(2026, 7, 6, 3, 1)
+        )
+        return CreatorChannelCommunityPostDetail(
+            post = CreatorChannelCommunityPost(
+                postId = 1L,
+                creatorId = 10L,
+                creatorNickname = "creator",
+                creatorProfileUrl = "https://cdn.test/profile.png",
+                imageUrl = "https://cdn.test/image.png",
+                audioUrl = null,
+                content = "content",
+                price = 0,
+                createdAt = LocalDateTime.of(2026, 7, 6, 3, 0),
+                existOrdered = false,
+                isCommentAvailable = true,
+                likeCount = 1,
+                commentCount = 1,
+                isPinned = true,
+                isLiked = true
+            ),
+            comments = CreatorChannelCommunityComments(
+                commentCount = 1,
+                comments = listOf(
+                    CreatorChannelCommunityComment(
+                        commentId = 1L,
+                        writerProfileImageUrl = "https://cdn.test/comment.png",
+                        writerNickname = "comment-writer",
+                        content = "comment",
+                        createdAt = LocalDateTime.of(2026, 7, 6, 3, 0),
+                        latestReply = reply
+                    )
+                ),
+                page = CreatorChannelPage(0, 20),
+                hasNext = true
+            )
+        )
+    }
+
+    private fun createReplies(): CreatorChannelCommunityReplies {
+        return CreatorChannelCommunityReplies(
+            replyCount = 1,
+            replies = listOf(
+                CreatorChannelCommunityReply(
+                    commentId = 2L,
+                    writerProfileImageUrl = "https://cdn.test/reply.png",
+                    writerNickname = "reply-writer",
+                    content = "reply",
+                    createdAt = LocalDateTime.of(2026, 7, 6, 3, 1)
+                )
+            ),
+            page = CreatorChannelPage(0, 20),
+            hasNext = true
+        )
+    }
+}

src/test/kotlin/kr/co/vividnext/sodalive/v2/creator/channel/community/domain/CreatorChannelCommunityQueryPolicyTest.kt

@@ -41,6 +41,20 @@ class CreatorChannelCommunityQueryPolicyTest {
         assertEquals(51, maximumPage.fetchLimit)
     }
 
+    @Test
+    @DisplayName("커뮤니티 댓글도 커뮤니티 탭과 같은 page fallback 정책을 사용한다")
+    fun shouldUseSamePageFallbackForCommunityComments() {
+        val defaultPage = policy.createPage(page = null, size = null)
+        val boundedPage = policy.createPage(page = -1, size = 100)
+
+        assertEquals(0, defaultPage.page)
+        assertEquals(20, defaultPage.size)
+        assertEquals(21, defaultPage.fetchLimit)
+        assertEquals(0, boundedPage.page)
+        assertEquals(50, boundedPage.size)
+        assertEquals(51, boundedPage.fetchLimit)
+    }
+
     @Test
     @DisplayName("커뮤니티 탭 목록 정책은 요청 size만 남기고 다음 페이지 여부를 계산한다")
     fun shouldLimitItemsAndCalculateHasNext() {