notesnook/packages/core/utils/dataurl.js

/* 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/>.
 */

const REGEX = /^data:(image\/.+);base64,(.+)/;

function toObject(dataurl) {
  const regexResult = REGEX.exec(dataurl);
  if (!regexResult || regexResult.length < 3) return {};
  const [, mime, data] = regexResult;
  return { mime, data };
}

function fromObject({ type, data }) {
  if (REGEX.test(data)) return data;
  return `data:${type};base64,${data}`;
}

const dataurl = { toObject, fromObject };
export default dataurl;