feat(home-following): 팔로잉 탭 조회 service를 추가한다

src/main/kotlin/kr/co/vividnext/sodalive/v2/home/following/application/HomeFollowingQueryService.kt

@@ -0,0 +1,39 @@
+package kr.co.vividnext.sodalive.v2.home.following.application
+
+import kr.co.vividnext.sodalive.member.Member
+import kr.co.vividnext.sodalive.member.contentpreference.MemberContentPreferenceService
+import kr.co.vividnext.sodalive.v2.home.following.domain.HomeFollowing
+import kr.co.vividnext.sodalive.v2.home.following.port.out.HomeFollowingQueryPort
+import org.springframework.stereotype.Service
+import org.springframework.transaction.annotation.Transactional
+import java.time.Clock
+import java.time.LocalDateTime
+
+@Service
+@Transactional(readOnly = true)
+class HomeFollowingQueryService(
+    private val queryPort: HomeFollowingQueryPort,
+    private val memberContentPreferenceService: MemberContentPreferenceService,
+    private val nowProvider: () -> LocalDateTime = { LocalDateTime.now(Clock.systemUTC()) }
+) {
+    fun findHomeFollowing(member: Member): HomeFollowing {
+        val memberId = requireNotNull(member.id)
+        val canViewAdultContent = memberContentPreferenceService.canViewAdultContent(member)
+        val now = nowProvider()
+
+        return HomeFollowing(
+            followingCreators = queryPort.findFollowingCreators(memberId, FOLLOWING_CREATORS_LIMIT),
+            onAirLives = queryPort.findOnAirLives(memberId, canViewAdultContent, ON_AIR_LIVES_LIMIT),
+            recentChats = emptyList(),
+            monthlySchedules = queryPort.findMonthlySchedules(memberId, canViewAdultContent, now, MONTHLY_SCHEDULES_LIMIT),
+            recentNews = queryPort.findRecentNews(memberId, canViewAdultContent, now, RECENT_NEWS_LIMIT)
+        )
+    }
+
+    companion object {
+        private const val FOLLOWING_CREATORS_LIMIT = 20
+        private const val ON_AIR_LIVES_LIMIT = 10
+        private const val MONTHLY_SCHEDULES_LIMIT = 3
+        private const val RECENT_NEWS_LIMIT = 30
+    }
+}