Classes for your scripts
This script should not be not be installed directly. It is a library for other scripts to include with the meta directive // @require https://update.greasyfork.org/scripts/389765/1785927/CommonUtils.js
// ==UserScript==
// @name Common.Utils
// @description Classes for your scripts
// @author Anton Shevchuk
// @license MIT License
// @version 0.1.0
// @match *://*/*
// @grant none
// @namespace https://greasyfork.org/users/227648
// ==/UserScript==
(function () {
'use strict';
/**
* Object with a wrapper with getters and setters
*/
class Container {
constructor() {
this.container = {};
}
set(keys, value) {
let target = this.container;
for (let i = 0; i < keys.length - 1; i++) {
if (typeof target[keys[i]] === 'undefined')
target[keys[i]] = {};
target = target[keys[i]];
}
target[keys[keys.length - 1]] = value;
}
get(...keys) {
if (keys.length === 0)
return this.container;
let target = this.container;
for (let i = 0; i < keys.length; i++) {
if (typeof target[keys[i]] === 'undefined')
return null;
target = target[keys[i]];
}
return target;
}
has(...keys) {
let target = this.container;
for (let i = 0; i < keys.length; i++) {
if (typeof target[keys[i]] === 'undefined')
return false;
target = target[keys[i]];
}
return true;
}
}
/**
* Simple cache object with getters and setters
*/
class SimpleCache extends Container {
set(key, value) {
super.set([key], value);
}
}
class Tools {
/**
* Simple object check
*/
static isObject(item) {
return (item && typeof item === 'object' && !Array.isArray(item));
}
/**
* Deep merge objects
*/
static mergeDeep(target, ...sources) {
if (!sources.length)
return target;
const source = sources.shift();
if (Tools.isObject(target) && Tools.isObject(source)) {
for (const key in source) {
if (!source.hasOwnProperty(key))
continue;
if (Tools.isObject(source[key])) {
if (!Tools.isObject(target[key]))
Object.assign(target, { [key]: {} });
Tools.mergeDeep(target[key], source[key]);
}
else {
Object.assign(target, { [key]: source[key] });
}
}
}
return Tools.mergeDeep(target, ...sources);
}
}
/**
* Settings object with localStorage as storage
*/
class Settings extends Container {
constructor(uid, def = {}) {
super();
this.uid = uid;
this.default = def;
this.load();
}
load() {
let settings = localStorage.getItem(this.uid);
if (settings) {
let parsed = JSON.parse(settings);
this.container = Tools.mergeDeep({}, this.default, parsed);
}
else {
this.container = Tools.mergeDeep({}, this.default);
}
}
/**
* With jQuery:
* $(window).on('beforeunload', () => SettingsInstance.save() );
*/
save() {
localStorage.setItem(this.uid, JSON.stringify(this.container));
}
}
// Expose as globals (consumed via @require by other scripts)
Object.assign(window, { Container, SimpleCache, Settings, Tools });
})();