feat(community): 게시물 상세 API 엔드포인트를 추가한다

src/main/kotlin/kr/co/vividnext/sodalive/v2/api/creator/channel/community/adapter/in/web/CreatorChannelCommunityController.kt

@@ -33,6 +33,53 @@ class CreatorChannelCommunityController(
         )
     }
 
+    @GetMapping("/community-posts/{postId}")
+    fun getCommunityPostDetail(
+        @PathVariable postId: Long,
+        @AuthenticationPrincipal(expression = "#this == 'anonymousUser' ? null : member") member: Member?
+    ) = run {
+        ApiResponse.ok(
+            creatorChannelCommunityFacade.getCommunityPostDetail(
+                postId = postId,
+                viewer = requireMember(member)
+            )
+        )
+    }
+
+    @GetMapping("/community-posts/{postId}/comments")
+    fun getCommunityComments(
+        @PathVariable postId: Long,
+        @RequestParam(required = false) page: Int?,
+        @RequestParam(required = false) size: Int?,
+        @AuthenticationPrincipal(expression = "#this == 'anonymousUser' ? null : member") member: Member?
+    ) = run {
+        ApiResponse.ok(
+            creatorChannelCommunityFacade.getCommunityComments(
+                postId = postId,
+                viewer = requireMember(member),
+                page = page,
+                size = size
+            )
+        )
+    }
+
+    @GetMapping("/community-comments/{commentId}/replies")
+    fun getCommunityReplies(
+        @PathVariable commentId: Long,
+        @RequestParam(required = false) page: Int?,
+        @RequestParam(required = false) size: Int?,
+        @AuthenticationPrincipal(expression = "#this == 'anonymousUser' ? null : member") member: Member?
+    ) = run {
+        ApiResponse.ok(
+            creatorChannelCommunityFacade.getCommunityReplies(
+                commentId = commentId,
+                viewer = requireMember(member),
+                page = page,
+                size = size
+            )
+        )
+    }
+
     private fun requireMember(member: Member?): Member {
         return member ?: throw SodaException(messageKey = "common.error.bad_credentials")
     }

src/main/kotlin/kr/co/vividnext/sodalive/v2/api/creator/channel/community/application/CreatorChannelCommunityFacade.kt

@@ -1,6 +1,9 @@
 package kr.co.vividnext.sodalive.v2.api.creator.channel.community.application
 
 import kr.co.vividnext.sodalive.member.Member
+import kr.co.vividnext.sodalive.v2.api.creator.channel.community.dto.CreatorChannelCommunityCommentsResponse
+import kr.co.vividnext.sodalive.v2.api.creator.channel.community.dto.CreatorChannelCommunityPostDetailResponse
+import kr.co.vividnext.sodalive.v2.api.creator.channel.community.dto.CreatorChannelCommunityRepliesResponse
 import kr.co.vividnext.sodalive.v2.api.creator.channel.community.dto.CreatorChannelCommunityTabResponse
 import kr.co.vividnext.sodalive.v2.creator.channel.community.application.CreatorChannelCommunityQueryService
 import org.springframework.stereotype.Service
@@ -29,4 +32,54 @@ class CreatorChannelCommunityFacade(
             )
         )
     }
+
+    fun getCommunityPostDetail(
+        postId: Long,
+        viewer: Member,
+        now: LocalDateTime = LocalDateTime.now()
+    ): CreatorChannelCommunityPostDetailResponse {
+        return CreatorChannelCommunityPostDetailResponse.from(
+            creatorChannelCommunityQueryService.getCommunityPostDetail(
+                postId = postId,
+                viewer = viewer,
+                now = now
+            )
+        )
+    }
+
+    fun getCommunityComments(
+        postId: Long,
+        viewer: Member,
+        page: Int?,
+        size: Int?,
+        now: LocalDateTime = LocalDateTime.now()
+    ): CreatorChannelCommunityCommentsResponse {
+        return CreatorChannelCommunityCommentsResponse.from(
+            creatorChannelCommunityQueryService.getCommunityComments(
+                postId = postId,
+                viewer = viewer,
+                page = page,
+                size = size,
+                now = now
+            )
+        )
+    }
+
+    fun getCommunityReplies(
+        commentId: Long,
+        viewer: Member,
+        page: Int?,
+        size: Int?,
+        now: LocalDateTime = LocalDateTime.now()
+    ): CreatorChannelCommunityRepliesResponse {
+        return CreatorChannelCommunityRepliesResponse.from(
+            creatorChannelCommunityQueryService.getCommunityReplies(
+                commentId = commentId,
+                viewer = viewer,
+                page = page,
+                size = size,
+                now = now
+            )
+        )
+    }
 }