71 lines
2 KiB
TypeScript
71 lines
2 KiB
TypeScript
import { ELEMENT_NODE, parse, walkSync } from "ultrahtml";
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export default eventHandler(async (event) => {
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const rawPath =
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event.path[event.path.length - 1] === "/"
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? event.path.slice(0, -1)
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: event.path;
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const filename = rawPath === "" ? "/index.html" : `${rawPath}.html`;
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const fallback = getPath(rawPath + "/index.html");
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const path = getPath(filename);
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let html = await useStorage().getItem(path);
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if (!html) html = await useStorage().getItem(fallback);
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if (!html) html = await useStorage().getItem(getPath("/404.html"));
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// transforms
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const transforms = [insertRegistry, doSetUp];
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if (html) {
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for (const transform of transforms) {
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html = transform(html.toString());
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}
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}
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/**
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* TODO remove server:script tags
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*/
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return html ?? new Response("Not found", { status: 404 });
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});
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function getPath(filename: string) {
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return `assets/pages${filename}`;
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}
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function insertRegistry(html: string): string {
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// temporary; use ultrahtml later
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const registryScript =
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'<script type="module" src="./.output/registry.js"></script>';
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return html.toString().replace("</head>", registryScript + "</head>");
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}
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function doSetUp(html: string) {
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const ast = parse(html);
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const serverScripts = [];
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walkSync(ast, (node) => {
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const { attributes } = node;
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const attributeKeys = Object.keys(attributes ?? {});
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const isServerScript = attributeKeys.some((key) => key.includes("server:"));
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const isInHead = node.parent?.name === "head";
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if (
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node.type === ELEMENT_NODE &&
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node.name === "script" &&
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isServerScript &&
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isInHead
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) {
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const scripts = node.children.map((child) => child.value);
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serverScripts.push(scripts.join(" "));
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}
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});
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const setupMap = {};
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serverScripts.forEach((script: string) => {
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const constructor = `
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new Function(\`${script}\`);
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`;
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const evalStore = eval(constructor);
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Object.assign(setupMap, new evalStore());
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});
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return html.replace("{{name}}", setupMap["name"]);
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}
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