comfyui-mcp/dist/utils/html-to-markdown.js

Local-first, agent-native control plane for ComfyUI — MCP server + autonomous sidebar agent that drives your live graph in natural language on ANY LLM: Claude/ChatGPT/Gemini on your subscription (no API key), free local models via Ollama (fully offline),

// A small, dependency-free HTML → Markdown converter, scoped to the kind of
// markup CivitAI model/version descriptions use (paragraphs, line breaks,
// headings, bold/italic, links, lists, code, blockquotes). It is deliberately
// forgiving: anything it doesn't recognise is stripped rather than escaped, so
// the output is always readable plain-ish Markdown for an agent to consume — it
// is NOT a faithful round-trippable transform.
const NAMED_ENTITIES = {
    amp: "&",
    lt: "<",
    gt: ">",
    quot: '"',
    apos: "'",
    nbsp: " ",
    mdash: "—",
    ndash: "–",
    hellip: "…",
    copy: "©",
    reg: "®",
    trade: "™",
    deg: "°",
};
function decodeEntities(s) {
    return s.replace(/&(#x?[0-9a-f]+|[a-z]+);/gi, (m, body) => {
        if (body[0] === "#") {
            const code = body[1] === "x" || body[1] === "X"
                ? parseInt(body.slice(2), 16)
                : parseInt(body.slice(1), 10);
            return Number.isFinite(code) ? String.fromCodePoint(code) : m;
        }
        const named = NAMED_ENTITIES[body.toLowerCase()];
        return named ?? m;
    });
}
/**
 * Convert a subset of HTML to Markdown. Returns "" for empty/whitespace input.
 */
export function htmlToMarkdown(html) {
    if (!html)
        return "";
    let s = html;
    // Drop elements whose content is never useful as text.
    s = s.replace(/<(script|style|head)\b[\s\S]*?<\/\1>/gi, "");
    // Comments.
    s = s.replace(/<!--[\s\S]*?-->/g, "");
    // Inline formatting.
    s = s.replace(/<\s*(strong|b)\b[^>]*>([\s\S]*?)<\/\s*\1\s*>/gi, "**$2**");
    s = s.replace(/<\s*(em|i)\b[^>]*>([\s\S]*?)<\/\s*\1\s*>/gi, "_$2_");
    s = s.replace(/<\s*code\b[^>]*>([\s\S]*?)<\/\s*code\s*>/gi, "`$1`");
    s = s.replace(/<\s*a\b[^>]*href\s*=\s*["']([^"']*)["'][^>]*>([\s\S]*?)<\/\s*a\s*>/gi, (_m, href, text) => {
        const t = text.trim() || href;
        return href ? `[${t}](${href})` : t;
    });
    // Headings → ATX. Level from the tag number.
    s = s.replace(/<\s*h([1-6])\b[^>]*>([\s\S]*?)<\/\s*h\1\s*>/gi, (_m, lvl, text) => `\n\n${"#".repeat(Number(lvl))} ${text.trim()}\n\n`);
    // List items → "- " lines (ordered lists also become dashes; good enough).
    s = s.replace(/<\s*li\b[^>]*>([\s\S]*?)<\/\s*li\s*>/gi, (_m, text) => {
        return `\n- ${text.trim()}`;
    });
    s = s.replace(/<\/?\s*(ul|ol)\b[^>]*>/gi, "\n");
    // Blockquotes.
    s = s.replace(/<\s*blockquote\b[^>]*>([\s\S]*?)<\/\s*blockquote\s*>/gi, (_m, text) => "\n" +
        text
            .trim()
            .split(/\n/)
            .map((l) => `> ${l.trim()}`)
            .join("\n") +
        "\n");
    // Block separators.
    s = s.replace(/<\s*br\s*\/?\s*>/gi, "\n");
    s = s.replace(/<\/\s*p\s*>/gi, "\n\n");
    s = s.replace(/<\s*p\b[^>]*>/gi, "");
    s = s.replace(/<\/?\s*div\b[^>]*>/gi, "\n");
    s = s.replace(/<\s*hr\s*\/?\s*>/gi, "\n\n---\n\n");
    // Strip any remaining tags.
    s = s.replace(/<[^>]+>/g, "");
    s = decodeEntities(s);
    // Normalise whitespace: trim each line, collapse 3+ blank lines to one.
    s = s
        .split("\n")
        .map((l) => l.replace(/[ \t]+$/g, ""))
        .join("\n")
        .replace(/\n{3,}/g, "\n\n")
        .trim();
    return s;
}
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