feat(usercreatorchat): openRoom 상대방 프로필을 반환한다

src/main/kotlin/kr/co/vividnext/sodalive/v2/usercreatorchat/dto/UserCreatorChatDtos.kt

@@ -24,6 +24,8 @@ data class SendUserCreatorChatMessageResponse(
 
 data class UserCreatorChatRoomOpenResponse(
     val roomId: Long,
+    val opponentNickname: String,
+    val opponentProfileImageUrl: String,
     val messages: List<UserCreatorChatMessageItemDto>,
     val hasMore: Boolean,
     val nextCursor: Long?

src/main/kotlin/kr/co/vividnext/sodalive/v2/usercreatorchat/service/UserCreatorChatService.kt

@@ -73,9 +73,14 @@ class UserCreatorChatService(
     fun openRoom(member: Member, roomId: Long, limit: Int = 20): UserCreatorChatRoomOpenResponse {
         val room = findRoom(roomId)
         requireParticipant(roomId, member.id!!)
+        val opponent = participantRepository.findActiveOpponent(roomId, member.id!!)?.member
+            ?: throw SodaException(messageKey = "chat.room.invalid_access")
+        val opponentProfilePath = opponent.profileImage ?: "profile/default-profile.png"
         val page = getMessages(member, roomId, cursor = null, limit = limit)
         return UserCreatorChatRoomOpenResponse(
             roomId = room.id!!,
+            opponentNickname = opponent.nickname,
+            opponentProfileImageUrl = "$cloudFrontHost/$opponentProfilePath",
             messages = page.messages,
             hasMore = page.hasMore,
             nextCursor = page.nextCursor

src/test/kotlin/kr/co/vividnext/sodalive/v2/usercreatorchat/UserCreatorChatServiceTest.kt

@@ -81,6 +81,61 @@ class UserCreatorChatServiceTest {
         Mockito.verify(participantRepository, Mockito.times(2)).save(Mockito.any(UserCreatorChatParticipant::class.java))
     }
 
+    @Test
+    @DisplayName("방 입장 응답은 상대방 닉네임과 프로필 이미지 URL을 포함한다")
+    fun shouldOpenRoomWithOpponentProfileWhenOpponentHasProfileImage() {
+        val user = member(1L, "user")
+        val creator = member(2L, "creator").apply {
+            profileImage = "profile/creator.png"
+        }
+        val room = room(10L)
+        val userParticipant = participant(100L, room, user)
+        val creatorParticipant = participant(101L, room, creator)
+        Mockito.`when`(roomRepository.findByIdAndIsActiveTrue(10L)).thenReturn(room)
+        Mockito.`when`(participantRepository.findActiveByRoomIdAndMemberId(10L, 1L)).thenReturn(userParticipant)
+        Mockito.`when`(participantRepository.findActiveOpponent(10L, 1L)).thenReturn(creatorParticipant)
+        Mockito.`when`(
+            messageRepository.findByChatRoomAndIsActiveTrueOrderByIdDesc(
+                room,
+                PageRequest.of(0, 20)
+            )
+        ).thenReturn(emptyList())
+
+        val response = service.openRoom(user, roomId = 10L)
+
+        assertEquals(10L, response.roomId)
+        assertEquals("creator", response.opponentNickname)
+        assertEquals("https://cdn.test/profile/creator.png", response.opponentProfileImageUrl)
+        assertEquals(emptyList<UserCreatorChatMessageItemDto>(), response.messages)
+        assertFalse(response.hasMore)
+        assertEquals(null, response.nextCursor)
+        Mockito.verify(participantRepository).findActiveOpponent(10L, 1L)
+    }
+
+    @Test
+    @DisplayName("상대방 프로필 이미지가 없으면 방 입장 응답은 기본 프로필 이미지 URL을 반환한다")
+    fun shouldOpenRoomWithDefaultOpponentProfileWhenOpponentProfileImageIsNull() {
+        val user = member(1L, "user")
+        val creator = member(2L, "creator")
+        val room = room(10L)
+        val userParticipant = participant(100L, room, user)
+        val creatorParticipant = participant(101L, room, creator)
+        Mockito.`when`(roomRepository.findByIdAndIsActiveTrue(10L)).thenReturn(room)
+        Mockito.`when`(participantRepository.findActiveByRoomIdAndMemberId(10L, 1L)).thenReturn(userParticipant)
+        Mockito.`when`(participantRepository.findActiveOpponent(10L, 1L)).thenReturn(creatorParticipant)
+        Mockito.`when`(
+            messageRepository.findByChatRoomAndIsActiveTrueOrderByIdDesc(
+                room,
+                PageRequest.of(0, 20)
+            )
+        ).thenReturn(emptyList())
+
+        val response = service.openRoom(user, roomId = 10L)
+
+        assertEquals("creator", response.opponentNickname)
+        assertEquals("https://cdn.test/profile/default-profile.png", response.opponentProfileImageUrl)
+    }
+
     @Test
     @DisplayName("상대방이 같은 방에 입장 중이면 텍스트 메시지를 실시간 전송하고 푸시를 보내지 않는다")
     fun shouldSendRealtimeMessageWithoutPushWhenOpponentIsPresent() {