import { ProjectPluginStructure, UIDLBlogRssFeed } from '@teleporthq/teleport-types';
/**
 * Where the published site serves the blog's RSS feed — and, for every
 * language but the main one, at `/<locale>/rss.xml`.
 *
 * ⛔ PAIRED with `BLOG_RSS_PATH` in the GUI's
 * `features/blog/constants/blog-rss.ts`, which shows the owner this address.
 */
export declare const BLOG_RSS_ROUTE = "/rss.xml";
/** How many posts the feed lists: the newest ones. */
export declare const BLOG_RSS_FEED_SIZE = 20;
interface BlogRssPageParams {
    feed: UIDLBlogRssFeed;
    /** The `utils/data-sources/` module that reads the posts table. */
    fetcherModule: string;
    /** The site's canonical origin, `null` when the pages carry none. */
    siteUrl: string | null;
    title: string;
    description: string;
}
/**
 * `pages/rss.xml.js`: an RSS 2.0 document of the newest published posts,
 * written by `getServerSideProps` itself (the page renders nothing).
 *
 * The rows come from the blog's own generated fetcher, so every database the
 * blog can live in works, and a multi-language site answers `/es/rss.xml` with
 * the Spanish copy of each post. Fields are read under their transformed name
 * first and their column name second: only some fetchers transform the rows.
 *
 * More posts are read than listed, so the ones without an address of their
 * own (no slug, or a redirect elsewhere) can be left out, and a draft started
 * long ago but published today — ordered by `created_at` among the old ones —
 * still makes the cut once the feed orders by publication date.
 *
 * A database that cannot be read answers 503 with `Retry-After`: an empty
 * feed would tell readers every post was gone.
 */
export declare const generateBlogRssPageSource: (params: BlogRssPageParams) => string;
/**
 * The `<link rel="alternate">` every page carries, so browsers and feed
 * readers find the feed — the one in the language the page is in.
 */
export declare const generateBlogFeedLinkSource: (title: string) => string;
/**
 * Emits the feed route and announces it from every page. Nothing is emitted
 * when the posts table has no fetcher to read it through.
 */
export declare const addBlogRssFeed: (structure: ProjectPluginStructure, feed: UIDLBlogRssFeed) => void;
export {};
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