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/389765/1090053/CommonUtils.js
// ==UserScript==
// @name Common.Utils
// @description Classes for your scripts
// @author Anton Shevchuk
// @license MIT License
// @version 0.0.7
// @match *://*/*
// @grant none
// @namespace https://greasyfork.org/users/227648
// ==/UserScript==
/**
* Object with wrapper with getters and setters
*/
class Container {
constructor() {
this.container = {};
}
/**
* @param {String[]} keys
* @param {String} value
*/
set(keys, value) {
this._set(this.container, keys, value);
}
_set(elements, keys, value) {
let key = keys.shift();
if (typeof elements[key] === 'undefined') {
elements[key] = {};
}
if (keys.length === 0) {
elements[key] = value;
} else {
this._set(elements[key], keys, value);
}
}
/**
* @param {String} keys
* @return {null|*}
*/
get(...keys) {
if (keys.length === 0) {
return this.container
}
if (this.has(...keys)) {
return this._get(this.container, ...keys);
} else {
return null;
}
}
_get(elements, ...keys) {
let key = keys.shift();
if (typeof elements[key] === 'undefined') {
return null;
}
if (keys.length === 0) {
return elements[key];
} else {
return this._get(elements[key], ...keys);
}
}
/**
* @param {String} keys
* @return {boolean}
*/
has(...keys) {
return this._has(this.container, ...keys);
}
_has(elements, ...keys) {
let key = keys.shift();
if (typeof elements[key] === 'undefined') {
return false;
}
if (keys.length === 0) {
return true;
} else {
return this._has(elements[key], ...keys);
}
}
}
/**
* Simple cache object with getters and setters
*/
class SimpleCache extends Container {
/**
* @param {String} key
* @param {*} value
*/
set(key, value) {
super.set([key], value);
}
}
/**
* 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) {
settings = JSON.parse(settings);
this.container = Tools.mergeDeep({}, this.default, settings);
} else {
this.container = this.default;
}
}
/**
* With jQuery:
* $(window).on('beforeunload', () => SettingsInstance.save() );
*/
save() {
localStorage.setItem(this.uid, JSON.stringify(this.container));
}
}
/**
* Static functions
*/
class Tools {
/**
* Simple object check
* @param {Object} item
* @returns {Boolean}
*/
static isObject(item) {
return (item && typeof item === 'object' && !Array.isArray(item));
}
/**
* Deep merge objects
* @param {Object} target
* @param {Array} sources
*/
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 (Tools.isObject(source[key])) {
if (!target[key]) Object.assign(target, { [key]: {} });
Tools.mergeDeep(target[key], source[key]);
} else {
Object.assign(target, { [key]: source[key] });
}
}
}
return Tools.mergeDeep(target, ...sources);
}
}