63 lines
2.0 KiB
JavaScript
63 lines
2.0 KiB
JavaScript
// @ts-check
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import path from "node:path";
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import crypto from "node:crypto";
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import MagicString from "magic-string";
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import { cwd } from "../../utils/runtimeChecks.js";
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const regexTestPattern =
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/<img\s+src\s*=(?:"|')([^("|')]*)(?:"|')\s*alt\s*=\s*(?:"|')([^("|')]*)(?:"|')[^>]*>/;
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const regexExecPattern = new RegExp(regexTestPattern, "gs");
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const regexRenderPattern = /\$\$render`(.*)`/gs;
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export default async function transform(code, id) {
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if (id.endsWith(".md") && regexTestPattern.test(code)) {
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const { default: astroViteConfigs } = await import(
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// @ts-ignore
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"../../astroViteConfigs.js"
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);
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const { sourcemap } = astroViteConfigs;
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// Extract the "$$render`" part of the markdown string
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const [result] = [...code.matchAll(regexRenderPattern)];
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const [, renderString] = result;
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const renderIndex = result.index + "$$render`".length;
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const matches = renderString.matchAll(regexExecPattern);
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if (matches !== null) {
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const s = new MagicString(code);
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const uuid = crypto.randomBytes(4).toString("hex");
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const Picture = "Picture" + uuid;
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const renderComponent = "renderComponent" + uuid;
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s.prepend(
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`import { Picture as ${Picture} } from "astro-imagetools/components";\nimport { renderComponent as ${renderComponent} } from "${
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cwd + "/node_modules/astro/dist/runtime/server/index.js"
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}"\n;`
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);
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for (const match of matches) {
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const [matchedText, rawSrc, alt] = match;
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const src = rawSrc.match("(http://|https://|data:image/).*")
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? rawSrc
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: path.resolve(path.dirname(id), rawSrc).replace(cwd, "");
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s.overwrite(
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renderIndex + match.index,
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renderIndex + match.index + matchedText.length,
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`\${${renderComponent}($$result, "${Picture}", ${Picture}, { "src": "${src}", "alt": "${alt}" })}`
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);
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}
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return {
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code: s.toString(),
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map: sourcemap ? s.generateMap({ hires: true }) : null,
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};
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}
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}
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}
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