@saiballo/html-validator-enhanced/lib/config.js

A Node module with optional settings for validating HTML pages using the "validator.w3.org/nu" or "whatwg" standard.

const getData = require("./get-data");
const createDocument = require("./create-document-from-fragment");

const setUserAgent = (headers = {}) => {
	// Removes user-agent if environment is browser
	const { name, version } = require("../package.json");
	const isBrowser = typeof window !== "undefined" && typeof window.document !== "undefined";
	const isNode = typeof process !== "undefined" && process.versions != null && process.versions.node != null;
	const userAgent = `${name} v ${version}`;
	const keys = Object.keys(headers).map((key) => key.toLowerCase());
	const hasUserAgent = keys.includes("user-agent");
	return isBrowser && !isNode ? {} : hasUserAgent ? {} : { "user-agent": userAgent };
};

module.exports = async (options) => {
	const {ignore} = options;
	const format = ignore ? "text" : options.format || "json";
	const newOptions = {
		"url": "https://validator.w3.org/nu/",
		"headers": Object.assign({}, setUserAgent(options.headers), options.headers),
		"params": {
			"out": format
		},
		"method": "get"
	};

	if (options.validator) {
		newOptions.url = options.validator;
	}

	if (options.url) {
		newOptions.params.doc = options.url;
	}

	if (options.isLocal) {
		options.data = await getData(options.url);
	}

	if (options.data) {
		newOptions.data = options.isFragment ? createDocument(options.data) : options.data;
		newOptions.method = "post";
		if (!newOptions.headers["Content-Type"]) {
			newOptions.headers["Content-Type"] = "text/html; charset=utf-8";
		}
	}

	return newOptions;
};