From 7337538f0be8148c79923e0a1463b270b2fe6b39 Mon Sep 17 00:00:00 2001
From: alikia2x <alikia2x@outlook.com>
Date: Thu, 27 Mar 2025 05:49:19 +0800
Subject: [PATCH] fix: snapshotBefore may returns null even there's a snapshot
 exists

---
 lib/mq/exec/snapshotTick.ts | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/lib/mq/exec/snapshotTick.ts b/lib/mq/exec/snapshotTick.ts
index 319a20c..b18d845 100644
--- a/lib/mq/exec/snapshotTick.ts
+++ b/lib/mq/exec/snapshotTick.ts
@@ -173,7 +173,8 @@ export const collectMilestoneSnapshotsWorker = async (_job: Job) => {
 const getRegularSnapshotInterval = async (client: Client, aid: number) => {
 	const now = Date.now();
 	const date = new Date(now - 24 * HOUR);
-	const oldSnapshot = await findSnapshotBefore(client, aid, date);
+	let oldSnapshot = await findSnapshotBefore(client, aid, date);
+	if (!oldSnapshot) oldSnapshot = await findClosestSnapshot(client, aid, date);
 	const latestSnapshot = await getLatestSnapshot(client, aid);
 	if (!oldSnapshot || !latestSnapshot) return 0;
 	if (oldSnapshot.created_at === latestSnapshot.created_at) return 0;
@@ -181,7 +182,7 @@ const getRegularSnapshotInterval = async (client: Client, aid: number) => {
 	if (hoursDiff < 8) return 24;
 	const viewsDiff = latestSnapshot.views - oldSnapshot.views;
 	if (viewsDiff === 0) return 72;
-	const speedPerDay = viewsDiff / hoursDiff * 24;
+	const speedPerDay = viewsDiff / (hoursDiff + 0.001) * 24;
 	if (speedPerDay < 6) return 36;
 	if (speedPerDay < 120) return 24;
 	if (speedPerDay < 320) return 12;