mirror of https://github.com/node-red/node-red.git
93 lines
2.7 KiB
JavaScript
93 lines
2.7 KiB
JavaScript
/**
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* Copyright 2014 IBM Corp.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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**/
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var when = require("when");
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var clone = require("clone");
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var assert = require("assert");
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var userSettings = null;
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var globalSettings = null;
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var storage = null;
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var persistentSettings = {
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init: function(settings) {
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userSettings = settings;
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for (var i in settings) {
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if (settings.hasOwnProperty(i)) {
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(function() {
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var j = i;
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persistentSettings.__defineGetter__(j,function() { return userSettings[j]; });
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persistentSettings.__defineSetter__(j,function() { throw new Error("Property '"+i+"' is read-only"); });
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})();
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}
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}
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globalSettings = null;
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},
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load: function(_storage) {
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storage = _storage;
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return storage.getSettings().then(function(_settings) {
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globalSettings = _settings;
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});
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},
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get: function(prop) {
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if (userSettings.hasOwnProperty(prop)) {
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return clone(userSettings[prop]);
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}
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if (globalSettings === null) {
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throw new Error("Settings not available");
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}
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return clone(globalSettings[prop]);
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},
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set: function(prop,value) {
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if (userSettings.hasOwnProperty(prop)) {
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throw new Error("Property '"+prop+"' is read-only");
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}
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if (globalSettings === null) {
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throw new Error("Settings not available");
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}
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var current = globalSettings[prop];
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globalSettings[prop] = value;
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try {
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assert.deepEqual(current,value);
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return when.resolve();
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} catch(err) {
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return storage.saveSettings(globalSettings);
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}
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},
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available: function() {
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return (globalSettings !== null);
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},
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reset: function() {
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for (var i in userSettings) {
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if (userSettings.hasOwnProperty(i)) {
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delete persistentSettings[i];
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}
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}
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userSettings = null;
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globalSettings = null;
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storage = null;
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}
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}
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module.exports = persistentSettings;
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