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import { merge } from "../core/utils.ts";import { Page } from "../core/filesystem.ts";import { Search } from "../plugins/search.ts";
import type { Data, Site, StaticFile } from "../core.ts";
export interface Options {  /** The sitemap file name */  filename: string;
  /** The query to search pages included in the sitemap */  query: string;
  /** The values to sort the sitemap */  sort: string;}
// Default optionsexport const defaults: Options = {  filename: "/sitemap.xml",  query: "",  sort: "url=asc",};
/** A plugin to generate a sitemap.xml from page files after build */export default function (userOptions?: Partial<Options>) {  const options = merge(defaults, userOptions);
  return (site: Site) => {    site.addEventListener("afterRender", () => {      // Create the sitemap.xml page      const sitemap = Page.create(options.filename, getSitemapContent(site));
      // Add to the sitemap page to pages      site.pages.push(sitemap);
      // Search for the `robots.txt` file      const robots = site.files.some((file: StaticFile) =>        file.dest === "/robots.txt"      );
      // If the `robots.txt` file doesn't exist, create it      if (!robots) {        const robots = site.pages.find((page: Page) =>          page.data.url === "/robots.txt"        );
        if (robots) {          robots.content += `Sitemap: ${site.url(options.filename, true)}`;        } else {          site.pages.push(Page.create(            "/robots.txt",            `User-agent: *\nAllow: /\n\nSitemap: ${              site.url("/sitemap.xml", true)            }`,          ));        }      }    });
    function getSitemapContent(site: Site) {      const search = new Search(site, true);      const sitemap = search.pages(options.query, options.sort) as Data[];
      // deno-fmt-ignore      return `<?xml version="1.0" encoding="utf-8"?><urlset xmlns="http://www.sitemaps.org/schemas/sitemap/0.9">  ${sitemap.map((data: Data) =>  `<url>    <loc>${site.url(data.url as string, true)}</loc>    ${data.date ? `<lastmod>${data.date.toISOString()}</lastmod>` : ""}  </url>  `).join("").trim()}</urlset>`.trim();    }  };}