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import { preact, renderToString } from "../deps/preact.ts";import loader from "../core/loaders/module.ts";import { merge } from "../core/utils.ts";
import type { Data, Engine, Helper, Site } from "../core.ts";
export interface Options {  /** The list of extensions this plugin applies to */  extensions: string[] | {    pages: string[];    components: string[];  };}
// Default optionsexport const defaults: Options = {  extensions: [".jsx", ".tsx"],};
// JSX children typeexport type Children = preact.ComponentChildren;
/** Template engine to render JSX files using Preact */export class PreactJsxEngine implements Engine {  helpers: Record<string, Helper> = {};  basePath: string;
  constructor(basePath: string) {    this.basePath = basePath;  }
  deleteCache() {}
  async render(content: unknown, data: Data = {}) {    // The content is a string, so we have to convert it to a Preact element    if (typeof content === "string") {      content = preact.h("div", {        dangerouslySetInnerHTML: { __html: content },      });    }
    // Create the children property    let children = data.content;
    // If the children is a string, convert it to a Preact element    if (typeof children === "string") {      children = preact.h("div", {        dangerouslySetInnerHTML: { __html: children },      });    }
    const element =      typeof content === "object" && preact.isValidElement(content)        ? content        : (typeof content === "function"          ? await content({ ...data, children }, this.helpers)          : content) as preact.VNode;
    if (element && typeof element === "object") {      element.toString = () => renderToString(element);    }
    return element;  }
  renderSync(content: unknown, data: Data = {}): string {    const element = typeof content === "function"      ? content(data, this.helpers)      : content;
    if (element && typeof element === "object") {      element.toString = () => renderToString(element);    }
    return element;  }
  addHelper(name: string, fn: Helper) {    this.helpers[name] = fn;  }}
/** Register the plugin to support JSX and TSX files */export default function (userOptions?: Partial<Options>) {  const options = merge(defaults, userOptions);  const extensions = Array.isArray(options.extensions)    ? { pages: options.extensions, components: options.extensions }    : options.extensions;
  return (site: Site) => {    const engine = new PreactJsxEngine(site.src());
    site.loadPages(extensions.pages, loader, engine);    site.loadComponents(extensions.components, loader, engine);  };}