feat(home): AI 캐릭터 스냅샷 집계 기간을 정의한다

2026-07-10 03:20:20 +09:00
parent 9288b44d5e
commit eb4df66ece
2 changed files with 61 additions and 0 deletions
--- a/src/main/kotlin/kr/co/vividnext/sodalive/v2/recommendation/domain/RecommendationSnapshotWindowPolicy.kt
+++ b/src/main/kotlin/kr/co/vividnext/sodalive/v2/recommendation/domain/RecommendationSnapshotWindowPolicy.kt
@@ -0,0 +1,41 @@
+package kr.co.vividnext.sodalive.v2.recommendation.domain
+
+import java.time.LocalDateTime
+import java.time.ZoneId
+
+class RecommendationSnapshotWindowPolicy {
+    fun previousKstDayUtcWindow(nowUtc: LocalDateTime): RecommendationSnapshotWindow {
+        val previousKstDate = nowUtc
+            .atZone(UTC_ZONE)
+            .withZoneSameInstant(KST_ZONE)
+            .toLocalDate()
+            .minusDays(1)
+        val startUtc = previousKstDate
+            .atStartOfDay(KST_ZONE)
+            .withZoneSameInstant(UTC_ZONE)
+            .toLocalDateTime()
+        val endExclusiveUtc = previousKstDate
+            .plusDays(1)
+            .atStartOfDay(KST_ZONE)
+            .withZoneSameInstant(UTC_ZONE)
+            .toLocalDateTime()
+        val snapshotAt = endExclusiveUtc.minusSeconds(1)
+
+        return RecommendationSnapshotWindow(
+            startUtc = startUtc,
+            endExclusiveUtc = endExclusiveUtc,
+            snapshotAt = snapshotAt
+        )
+    }
+
+    companion object {
+        private val UTC_ZONE: ZoneId = ZoneId.of("UTC")
+        private val KST_ZONE: ZoneId = ZoneId.of("Asia/Seoul")
+    }
+}
+
+data class RecommendationSnapshotWindow(
+    val startUtc: LocalDateTime,
+    val endExclusiveUtc: LocalDateTime,
+    val snapshotAt: LocalDateTime
+)