src/adapters/settings/fs.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>
 * @licence Simplified BSD License
 */
const fs = require('fs-extra');
const path = require('path');

/**
 * FS Settings adapter
 * @param {Core} core Core reference
 * @param {object} [options] Adapter options
 */
module.exports = (core, options) => {
  const fsOptions = {
    system: false,
    path: 'home:/.osjs/settings.json',
    ...options || {}
  };

  const getRealFilename = (req) => fsOptions.system
    ? Promise.resolve(fsOptions.path)
    : core.make('osjs/vfs')
      .realpath(fsOptions.path, req.session.user);

  const before = req => getRealFilename(req)
    .then(filename => fs.ensureDir(path.dirname(filename))
      .then(() => filename));

  const save = req => before(req)
    .then(filename => fs.writeJson(filename, req.body))
    .then(() => true);

  const load = req => before(req)
    .then(filename => fs.readJson(filename))
    .catch(error => {
      core.logger.warn(error);
      return {};
    });

  return {save, load};
};