cloud-red/src/components/runtime/lib/storage/localfilesystem/settings.js

Serverless Node-RED for your cloud integration needs

/**
 * Copyright JS Foundation and other contributors, http://js.foundation
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 **/

var when = require('when');
var fs = require('fs-extra');
var fspath = require('path');

var log = require('../../../../util').log; // TODO: separate module
var util = require('./util');

var globalSettingsFile;
var globalSettingsBackup;
var settings;

module.exports = {
  init: function(_settings) {
    settings = _settings;
    globalSettingsFile = fspath.join(settings.userDir, '.config.json');
    globalSettingsBackup = fspath.join(settings.userDir, '.config.json.backup');
  },
  getSettings: function() {
    return when.promise(function(resolve, reject) {
      fs.readFile(globalSettingsFile, 'utf8', function(err, data) {
        if (!err) {
          try {
            return resolve(util.parseJSON(data));
          } catch (err2) {
            log.trace('Corrupted config detected - resetting');
          }
        }
        return resolve({});
      });
    });
  },
  saveSettings: function(newSettings) {
    if (settings.readOnly) {
      return when.resolve();
    }
    return util.writeFile(
      globalSettingsFile,
      JSON.stringify(newSettings, null, 1),
      globalSettingsBackup
    );
  }
};