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fix: scheduled post filter uses UTC instead of site timezone #663

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fix: scheduled post filter uses UTC instead of site timezone #663

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20 changes: 11 additions & 9 deletions src/utils/postFilter.ts
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Original file line number Diff line number Diff line change
@@ -1,16 +1,18 @@
import type { CollectionEntry } from "astro:content";
import dayjs from "dayjs";
import utc from "dayjs/plugin/utc";
import timezone from "dayjs/plugin/timezone";
import config from "@/config";

/**
* Determines whether a post is eligible to be listed/rendered.
*
* - Excludes drafts always
* - In production, excludes scheduled posts until `pubDatetime` minus the configured margin
* - In dev, always shows non-draft posts to make authoring easier
*/
dayjs.extend(utc);
dayjs.extend(timezone);

export function postFilter({ data }: CollectionEntry<"posts">) {
const tz = data.timezone ?? config.site.timezone;
// Interpret the date in the site's timezone instead of UTC, so that
// pubDatetime: 2026-06-28 means "June 28 in Shanghai" not "June 28 UTC".
const publishTime = dayjs.utc(data.pubDatetime).tz(tz, true);
const isPublishTimePassed =
Date.now() >
new Date(data.pubDatetime).getTime() - config.posts.scheduledPostMargin;
Date.now() > publishTime.valueOf() - config.posts.scheduledPostMargin;
return !data.draft && (import.meta.env.DEV || isPublishTimePassed);
}
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