@maizzle/framework/dist/utils/output-markers.js

Maizzle is a framework that helps you quickly build HTML emails with Tailwind CSS.

import { parse } from "./ast/parser.js";
import { serialize } from "./ast/serializer.js";
import "./ast/index.js";
//#region src/utils/output-markers.ts
/**
* Sentinel attributes the `<Plaintext>` and `<NotPlaintext>`
* components stamp on their wrapper `<div>` so the build step
* can route their slot content to one output and remove it
* entirely from the other.
*/
const PLAINTEXT_ONLY_ATTR = "data-maizzle-plaintext-only";
const HTML_ONLY_ATTR = "data-maizzle-html-only";
const isElement = (n) => n.type === "tag";
/**
* Apply marker rules to a forest of nodes.
*
* - `drop` removes the matched element and its descendants.
* - `unwrap` removes the wrapper element but keeps its children,
*   splicing them into the parent's child list in place.
*
* Non-matching elements recurse so nested markers are handled.
*/
function applyRules(nodes, rules) {
	const out = [];
	for (const n of nodes) {
		if (isElement(n)) {
			const match = rules.find(([attr]) => n.attribs?.[attr] !== void 0);
			if (match) {
				const [, op] = match;
				if (op === "drop") continue;
				out.push(...applyRules(n.children ?? [], rules));
				continue;
			}
			if (n.children?.length) n.children = applyRules(n.children, rules);
		}
		out.push(n);
	}
	return out;
}
const hasMarkers = (html) => html.includes("data-maizzle-plaintext-only") || html.includes("data-maizzle-html-only");
/**
* Strip output markers for the HTML output: drop plaintext-only
* subtrees entirely, unwrap html-only wrappers (keep children).
*
* When no markers are present, the input is returned unchanged so
* the post-transformer formatting (prettify, XHTML self-closing
* slashes, etc.) survives intact for the typical case.
*/
function stripForHtml(html) {
	if (!hasMarkers(html)) return html;
	const isXhtml = /<!DOCTYPE\s+[^>]*xhtml/i.test(html);
	return serialize(applyRules(parse(html), [[PLAINTEXT_ONLY_ATTR, "drop"], [HTML_ONLY_ATTR, "unwrap"]]), { selfClosingTags: isXhtml });
}
/**
* Strip output markers for the plaintext source: drop html-only
* subtrees entirely, unwrap plaintext-only wrappers (keep children).
*
* The result is fed to `createPlaintext`, which then strips all
* remaining tags via `string-strip-html`.
*/
function stripForPlaintext(html) {
	if (!hasMarkers(html)) return html;
	return serialize(applyRules(parse(html), [[HTML_ONLY_ATTR, "drop"], [PLAINTEXT_ONLY_ATTR, "unwrap"]]));
}
//#endregion
export { HTML_ONLY_ATTR, PLAINTEXT_ONLY_ATTR, stripForHtml, stripForPlaintext };

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