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import type { EnumChangefreq } from 'sitemap';
import type { SitemapItem, SitemapOptions } from './index.js';
import { parseUrl } from './utils/parse-url.js';
/** Construct sitemap.xml given a set of URLs */
export function generateSitemap(pages: string[], finalSiteUrl: string, opts: SitemapOptions) {
const { changefreq, priority, lastmod: lastmodSrc, i18n } = opts!;
// TODO: find way to respect <link rel="canonical"> URLs here
const urls = [...pages];
urls.sort((a, b) => a.localeCompare(b, 'en', { numeric: true })); // sort alphabetically so sitemap is same each time
const lastmod = lastmodSrc?.toISOString();
const { locales, defaultLocale } = i18n || {};
const localeCodes = Object.keys(locales || {});
const getPath = (url: string) => {
const result = parseUrl(url, i18n?.defaultLocale || '', localeCodes, finalSiteUrl);
return result?.path;
};
const getLocale = (url: string) => {
const result = parseUrl(url, i18n?.defaultLocale || '', localeCodes, finalSiteUrl);
return result?.locale;
};
const urlData: SitemapItem[] = urls.map((url) => {
let links;
if (defaultLocale && locales) {
const currentPath = getPath(url);
if (currentPath) {
const filtered = urls.filter((subUrl) => getPath(subUrl) === currentPath);
if (filtered.length > 1) {
links = filtered.map((subUrl) => ({
url: subUrl,
lang: locales[getLocale(subUrl)!],
}));
}
}
}
return {
url,
links,
lastmod,
priority,
changefreq: changefreq as EnumChangefreq,
};
});
return urlData;
}
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