/*
This file is part of the Notesnook project (https://notesnook.com/)

Copyright (C) 2022 Streetwriters (Private) Limited

This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.

This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU General Public License for more details.

You should have received a copy of the GNU General Public License
along with this program.  If not, see <http://www.gnu.org/licenses/>.
*/

import { Parser } from "htmlparser2";

const ALLOWED_ATTRIBUTES = ["href", "src", "data-hash"];

export function isHTMLEqual(one, two) {
  if (typeof one !== "string" || typeof two !== "string") return false;

  return toDiffable(one) === toDiffable(two);
}

function toDiffable(html) {
  let text = "";
  const parser = new Parser(
    {
      ontext: (data) => (text += data.trim()),
      onopentag: (_name, attr) => {
        for (const key of ALLOWED_ATTRIBUTES) {
          const value = attr[key];
          if (!value) continue;
          text += value.trim();
        }
      }
    },
    {
      lowerCaseTags: false,
      parseAttributes: true
    }
  );
  parser.end(html);
  return text;
}