src/adapters/settings/localstorage.js

/*
 * OS.js - JavaScript Cloud/Web Desktop Platform
 *
 * Copyright (c) Anders Evenrud <andersevenrud@gmail.com>
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *
 * 1. Redistributions of source code must retain the above copyright notice, this
 *    list of conditions and the following disclaimer
 * 2. Redistributions in binary form must reproduce the above copyright notice,
 *    this list of conditions and the following disclaimer in the documentation
 *    and/or other materials provided with the distribution
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR
 * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 *
 * @author  Anders Evenrud <andersevenrud@gmail.com>
 * @license Simplified BSD License
 */

import logger from '../../logger';

/**
 * LocalStorage Settings adapter
 * @param {Core} core Core reference
 * @param {object} [options] Adapter options
 */
const localStorageSettings = (core) => {
  const prefix = core.config('settings.prefix', '');

  return {
    clear(ns) {
      if (ns) {
        localStorage.removeItem(prefix + ns);
      } else {
        localStorage.clear();
      }

      return Promise.resolve(true);
    },

    save(settings) {
      Object.keys(settings).forEach((k) => {
        localStorage.setItem(prefix + k, JSON.stringify(settings[k]));
      });

      return Promise.resolve(true);
    },

    load() {
      const entries = Object
        .keys(localStorage)
        .filter(k => prefix ? k.startsWith(prefix) : true)
        .map((k) => {
          const v = localStorage.getItem(k);
          const kk = prefix ? k.substr(prefix.length) : k;

          try {
            return [kk, JSON.parse(v)];
          } catch (e) {
            logger.warn(`localStorageAdapter parse failed for '${k}'`, e);
          }

          return [kk, v];
        });

      return Promise.resolve(Object.fromEntries(entries));
    }
  };
};


export default localStorageSettings;