63 lines
1.8 KiB
TypeScript
63 lines
1.8 KiB
TypeScript
import type { MetadataRoute } from "next";
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import { routing } from "@/i18n/routing";
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import { getAllPosts } from "@/lib/posts";
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import { siteConfig } from "@/lib/site-config";
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/**
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* 动态生成 sitemap.xml。
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*
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* 覆盖：首页、关于页，以及全部已发布文章（草稿不会出现在这里）。
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* 每个条目都带上 hreflang alternate，帮助搜索引擎理解多语言对应关系。
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*
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* 内容来自数据库，因此 sitemap 也在请求时生成并缓存，
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* 而不是在构建期固化——否则构建之后新增的文章不会出现在 sitemap 中。
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*
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* 注意：Next.js 要求 sitemap 返回绝对 URL。
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*/
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export const revalidate = 60;
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export default async function sitemap(): Promise<MetadataRoute.Sitemap> {
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const posts = await getAllPosts();
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/** 为一条路径生成所有语言的 alternates */
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const buildAlternates = (path: string) => ({
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languages: Object.fromEntries(
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routing.locales.map((locale) => [
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locale,
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`${siteConfig.url}/${locale}${path}`,
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]),
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),
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});
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const staticEntries: MetadataRoute.Sitemap = routing.locales.flatMap(
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(locale) => [
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{
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url: `${siteConfig.url}/${locale}`,
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lastModified: new Date(),
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changeFrequency: "daily" as const,
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priority: 1,
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alternates: buildAlternates(""),
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},
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{
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url: `${siteConfig.url}/${locale}/about`,
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lastModified: new Date(),
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changeFrequency: "monthly" as const,
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priority: 0.6,
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alternates: buildAlternates("/about"),
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},
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],
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);
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const postEntries: MetadataRoute.Sitemap = routing.locales.flatMap((locale) =>
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posts.map((post) => ({
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url: `${siteConfig.url}/${locale}/posts/${post.slug}`,
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lastModified: new Date(`${post.date}T00:00:00Z`),
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changeFrequency: "weekly" as const,
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priority: 0.8,
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alternates: buildAlternates(`/posts/${post.slug}`),
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})),
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);
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return [...staticEntries, ...postEntries];
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}
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