"use strict";

const LinkifyIt = require("linkify-it");

LinkifyIt.prototype.normalize = function normalize(match) {
	if (!match.schema) {
		match.schema = "https:";
		match.url = "https://" + match.url;
	}

	if (match.schema === "//") {
		match.schema = "https:";
		match.url = "https:" + match.url;
	}

	if (match.schema === "mailto:" && !/^mailto:/i.test(match.url)) {
		match.url = "mailto:" + match.url;
	}
};

const linkify = LinkifyIt()
	.tlds(require("tlds"))
	.tlds("onion", true);

// Known schemes to detect in text
const commonSchemes = [
	"sftp",
	"smb", "file",
	"irc", "ircs",
	"svn", "git",
	"steam", "mumble", "ts3server",
	"svn+ssh", "ssh",
];

for (const schema of commonSchemes) {
	linkify.add(schema + ":", "http:");
}

function findLinks(text) {
	const matches = linkify.match(text);

	if (!matches) {
		return [];
	}

	return matches.map((url) => ({
		start: url.index,
		end: url.lastIndex,
		link: url.url,
	}));
}

module.exports = findLinks;