23 lines
1.0 KiB
TypeScript
23 lines
1.0 KiB
TypeScript
import { findClosestSnapshot, findSnapshotBefore, getLatestSnapshot } from "db/snapshotSchedule.ts";
|
|
import { HOUR } from "@core/const/time.ts";
|
|
import type { Psql } from "@core/db/psql.d.ts";
|
|
|
|
export const getRegularSnapshotInterval = async (sql: Psql, aid: number) => {
|
|
const now = Date.now();
|
|
const date = new Date(now - 24 * HOUR);
|
|
let oldSnapshot = await findSnapshotBefore(sql, aid, date);
|
|
if (!oldSnapshot) oldSnapshot = await findClosestSnapshot(sql, aid, date);
|
|
const latestSnapshot = await getLatestSnapshot(sql, aid);
|
|
if (!oldSnapshot || !latestSnapshot) return 0;
|
|
if (oldSnapshot.created_at === latestSnapshot.created_at) return 0;
|
|
const hoursDiff = (latestSnapshot.created_at - oldSnapshot.created_at) / HOUR;
|
|
if (hoursDiff < 8) return 24;
|
|
const viewsDiff = latestSnapshot.views - oldSnapshot.views;
|
|
if (viewsDiff === 0) return 72;
|
|
const speedPerDay = (viewsDiff / (hoursDiff + 0.001)) * 24;
|
|
if (speedPerDay < 6) return 36;
|
|
if (speedPerDay < 120) return 24;
|
|
if (speedPerDay < 320) return 12;
|
|
return 6;
|
|
};
|