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import loader from "../core/loaders/module.ts";import { merge } from "../core/utils/object.ts";
import type Site from "../core/site.ts";import type { Engine, Helper } from "../core/renderer.ts";
export interface Options {  /** The list of extensions this plugin applies to */  extensions?: string[];
  /** Optional sub-extension for page files */  pageSubExtension?: string;
  /**   * Custom includes path   * @default `site.options.includes`   */  includes?: string;}
// Default optionsexport const defaults: Options = {  extensions: [".js", ".ts"],  pageSubExtension: ".page",};
/** Template engine to render js/ts files */export class ModuleEngine implements Engine {  helpers: Record<string, Helper> = {};  includes: string;
  constructor(includes: string) {    this.includes = includes;  }
  deleteCache() {}
  async render(    content: unknown,    data: Record<string, unknown>,  ): Promise<unknown> {    return typeof content === "function"      ? await content(data, this.helpers)      : content;  }
  renderComponent(content: unknown, data: Record<string, unknown>): string {    return typeof content === "function"      ? content(data, this.helpers)      : content;  }
  addHelper(name: string, fn: Helper) {    this.helpers[name] = fn;  }}
/** Register the plugin to load JavaScript/TypeScript modules */export default function (userOptions?: Options) {  return (site: Site) => {    const options = merge(      { ...defaults, includes: site.options.includes },      userOptions,    );
    const engine = new ModuleEngine(options.includes);
    // Ignore includes folder    if (options.includes) {      site.ignore(options.includes);    }
    // Load the _data files    site.loadData(options.extensions, loader);
    // Load the pages and register the engine    site.loadPages(options.extensions, {      loader,      engine,      pageSubExtension: options.pageSubExtension,    });  };}