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import { merge } from "../core/utils.ts";
import type { Extensions, Page, Site } from "../core.ts";
export interface Options {  /** The list of extensions this plugin applies to */  extensions: Extensions;
  /** The function to test the page */  fn: (page: Page) => boolean;}
// Default optionsexport const defaults: Options = {  extensions: "*",  fn: () => true,};
/** A plugin to filter only some pages */export default function (userOptions?: Partial<Options>) {  const options = merge(defaults, userOptions);
  return (site: Site) => {    site.process(options.extensions, (page: Page) => {      if (!options.fn(page)) {        return false;      }    });  };}