Settings service for node-webkit

settings.js

/* jshint node: true */

//noinspection NpmUsedModulesInstalled
import Ember from 'ember';
import ENV from 'your-project-name/config/environment';
import nwENV from 'your-project-name/nw/env';

export default Ember.Service.extend({
    nwENV,
    ENV,
    flashMessages: Ember.inject.service(),
    lsKey: 'settings',
    init() {
        this._super(...arguments);
        this._restore();
    },
    setProperties() {
        let ret =  this._super(...arguments);
        this._persist();
        return ret;
    },
    set() {
        let ret = this._super(...arguments);
        this._persist();
        return ret;
    },
    _persist() {
        if (this.get('nwENV.isNodeWebKit')) {
            let fs = require('fs-extra');
            let path = require('path');
            let settingsFile = this.get('nwENV.appData') + 'settings.json';
            try {
                fs.accessSync(path.dirname(settingsFile), fs.constants.W_OK);
            } catch (e) {
                try {
                    fs.mkdirsSync(path.resolve(path.dirname(settingsFile)));
                } catch (e) {
                    this.get('flashMessages').warning('Can\'t create a directory for settings. ' + e.toString());
                }
            }
            try {
                fs.writeJSONSync(settingsFile, this.getProperties(Object.keys(this)), {spaces: 4});
            } catch (e) {
                this.get('flashMessages').warning('Can\'t save settings. ' + e.toString());
            }
        } else {
            window.localStorage.setItem(this.get('lsKey'), window.JSON.stringify(this.getProperties(Object.keys(this))));
        }
    },
    _restore() {
        let settings = {};

        if (this.get('nwENV.isNodeWebKit')) {
            let fs = require('fs-extra');
            let settingsFile = this.get('nwENV.appData') + 'settings.json';
            try {
                settings = fs.readJSONSync(settingsFile);
            } catch (e) {
            }
        } else {
            let data = window.localStorage.getItem(this.get('lsKey'));
            if (data) {
                try {
                    settings = window.JSON.parse(data);
                } catch (e) {
                }
            }
        }

        this.setProperties(Ember.$.extend(true, {}, this.get('ENV.defaultSettings'), settings));
    }
});