feat: on-route component registry resolution

mcfly.config.ts

@@ -1,6 +1,5 @@
 import defineConfig from "./packages/define-config";
-// import registerComponents from "./packages/register-components";
 
 export default defineConfig({
-  // onBuild: [registerComponents()],
+  components: "js",
 });

packages/define-config.ts

@@ -2,6 +2,7 @@ import { NitroApp } from "nitropack";
 
 export type McFlyConfig = {
   onBuild?: Array<(event: NitroApp) => void>;
+  components: "js" | "ts";
 };
 export default function defineConfig(config: McFlyConfig) {
   return () => config;

packages/register-components.ts

@@ -1,46 +0,0 @@
-import { existsSync, promises as fsp } from "node:fs";
-
-export default function registerComponents() {
-  return () => {
-    copyComponents();
-    buildRegistry();
-  };
-}
-
-const copyComponents = async () => {
-  const rawKeys = await useStorage().getKeys("assets:components");
-  rawKeys.forEach(async (key) => {
-    const cleanKey = key.replace("assets:components:", "");
-    const content = await useStorage().getItem(key);
-    if (!existsSync("./public/.output")) await fsp.mkdir("./public/.output");
-    await fsp.writeFile(`./public/.output/${cleanKey}`, content.toString());
-  });
-};
-
-const buildRegistry = async () => {
-  console.log("Building registry of custom elements...");
-  const rawKeys = await useStorage().getKeys("/assets/components");
-  const keys = rawKeys.map((key) => key.replace("assets:components:", ""));
-  console.log("Found components:", keys);
-  const imports = keys.map((key, index) => {
-    return `import C${index} from "./${key}"`;
-  });
-
-  const registryObject = `const registry = {
-    ${keys
-      .map((key, index) => {
-        const name = key.replace(".js", "").replace(".ts", "");
-        return `"${name}": C${index}`;
-      })
-      .join(",")}}`;
-
-  const customElementsDefine = `Object.keys(registry).forEach((key) => {if(window?.hasOwnProperty("customElements"))customElements.define(key, registry[key]);})`;
-
-  if (!existsSync("./public")) await fsp.mkdir("./public");
-  if (!existsSync("./public/.output")) await fsp.mkdir("./public/.output");
-
-  await fsp.writeFile(
-    "./public/.output/registry.js",
-    [...imports, registryObject, customElementsDefine].join(";")
-  );
-};

routes/[...index].ts

@@ -2,21 +2,28 @@
  * McFly SSR logic
  */
 
-import { ELEMENT_NODE, parse, renderSync, walkSync } from "ultrahtml";
+import { ELEMENT_NODE, parse, render, renderSync, walkSync } from "ultrahtml";
 import { parseScript } from "esprima";
+import config from "../mcfly.config";
 
 export default eventHandler(async (event) => {
   const { path } = event;
   let html = await getHtml(path);
 
+  const { components: componentType } = config();
+
   // transforms
-  const transforms = [doSetUp, deleteServerScripts, insertRegistry];
+  const transforms = [doSetUp, deleteServerScripts];
   if (html) {
     for (const transform of transforms) {
       html = transform(html.toString());
     }
   }
 
+  if (!!componentType) {
+    html = await insertRegistry(html.toString(), componentType);
+  }
+
   return html ?? new Response("Not found", { status: 404 });
 });
 
@@ -36,30 +43,60 @@ function getPath(filename: string) {
   return `assets/pages${filename}`;
 }
 
-function insertRegistry(html: string): string {
+async function insertRegistry(
-  // temporary; use ultrahtml later
+  html: string,
-  const registryScript =
+  type: "js" | "ts"
-    '<script type="module" src="./.output/registry.js"></script>';
+): Promise<string> {
-
   const ast = parse(html);
+  const componentFiles = (await useStorage().getKeys("assets:components"))
+    .map((key) => key.replace("assets:components:", ""))
+    .filter((key) => key.includes(type));
+  const availableComponents = componentFiles.map((key) =>
+    key.replace(`.${type}`, "")
+  );
 
-  let hasCustomElements = false;
+  const usedCustomElements = [];
 
   walkSync(ast, (node) => {
-    if (node.type === ELEMENT_NODE && node.name.includes("-")) {
+    const usedElement = availableComponents.find((name) => name === node.name);
-      hasCustomElements = true;
+
+    if (node.type === ELEMENT_NODE && !!usedElement) {
+      usedCustomElements.push(usedElement);
     }
   });
 
   // insert registry script to head
-  if (hasCustomElements)
+  if (usedCustomElements.length > 0) {
+    const registryScript = await buildRegistry(usedCustomElements, type);
     walkSync(ast, (node) => {
       if (node.type === ELEMENT_NODE && node.name === "head") {
         node.children.push(parse(registryScript));
       }
     });
+  }
 
-  return renderSync(ast);
+  return render(ast);
+}
+
+async function buildRegistry(usedCustomElements: string[], type: "js" | "ts") {
+  let registryScript = `<script type='module'>
+import { WebComponent } from "https://unpkg.com/web-component-base@1.6.15/WebComponent.js";
+`;
+
+  for (const name of usedCustomElements) {
+    const content = await useStorage().getItem(
+      `assets:components:${name}.${type}`
+    );
+    registryScript += content;
+    const evalStore = eval(`class WebComponent {};(${content.toString()})`);
+    const className = new evalStore().constructor.name;
+
+    registryScript += `customElements.define("${name}", ${className});`;
+  }
+
+  registryScript += "</script>";
+
+  return registryScript;
 }
 
 function doSetUp(html: string) {

src/components/clickable-text.js

@@ -1,6 +1,4 @@
-import { WebComponent } from "https://unpkg.com/web-component-base@1.6.15/WebComponent.js";
+class ClickableText extends WebComponent {
-
-export default class ClickableText extends WebComponent {
   onInit() {
     this.onclick = () => alert("Thank you for clicking the text!");
   }

src/components/hello-world.js

@@ -1,6 +1,4 @@
-import { WebComponent } from "https://unpkg.com/web-component-base@1.6.15/WebComponent.js";
+class HelloWorld extends WebComponent {
-
-export default class HelloWorld extends WebComponent {
   name = "";
   static properties = ["name"];
 

src/components/something-else.ts

@@ -0,0 +1 @@
+const hey = "AYO";