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Common.Utils

Classes for your scripts

此脚本不应直接安装。它是供其他脚本使用的外部库，要使用该库请加入元指令 // @require https://update.cn-greasyfork.org/scripts/389765/1090053/CommonUtils.js 

  1. // ==UserScript==
  2. // @name         Common.Utils
  3. // @description  Classes for your scripts
  4. // @author       Anton Shevchuk
  5. // @license      MIT License
  6. // @version      0.0.7
  7. // @match        *://*/*
  8. // @grant        none
  9. // @namespace    https://greasyfork.org/users/227648
  10. // ==/UserScript==
  11.  
  12. /**
  13.  * Object with wrapper with getters and setters
  14.  */
  15. class Container {
  16.   constructor() {
  17.     this.container = {};
  18.   }
  19.   /**
  20.    * @param {String[]} keys
  21.    * @param {String}   value
  22.    */
  23.   set(keys, value) {
  24.     this._set(this.container, keys, value);
  25.   }
  26.   _set(elements, keys, value) {
  27.     let key = keys.shift();
  28.     if (typeof elements[key] === 'undefined') {
  29.       elements[key] = {};
  30.     }
  31.     if (keys.length === 0) {
  32.       elements[key] = value;
  33.     } else {
  34.       this._set(elements[key], keys, value);
  35.     }
  36.   }
  37.   /**
  38.    * @param {String} keys
  39.    * @return {null|*}
  40.    */
  41.   get(...keys) {
  42.     if (keys.length === 0) {
  43.       return this.container
  44.     }
  45.     if (this.has(...keys)) {
  46.       return this._get(this.container, ...keys);
  47.     } else {
  48.       return null;
  49.     }
  50.   }
  51.   _get(elements, ...keys) {
  52.     let key = keys.shift();
  53.     if (typeof elements[key] === 'undefined') {
  54.       return null;
  55.     }
  56.     if (keys.length === 0) {
  57.       return elements[key];
  58.     } else {
  59.       return this._get(elements[key], ...keys);
  60.     }
  61.   }
  62.   /**
  63.    * @param {String} keys
  64.    * @return {boolean}
  65.    */
  66.   has(...keys) {
  67.     return this._has(this.container, ...keys);
  68.   }
  69.   _has(elements, ...keys) {
  70.     let key = keys.shift();
  71.     if (typeof elements[key] === 'undefined') {
  72.       return false;
  73.     }
  74.     if (keys.length === 0) {
  75.       return true;
  76.     } else {
  77.       return this._has(elements[key], ...keys);
  78.     }
  79.   }
  80. }
  81.  
  82. /**
  83.  * Simple cache object with getters and setters
  84.  */
  85. class SimpleCache extends Container {
  86.   /**
  87.    * @param {String} key
  88.    * @param {*} value
  89.    */
  90.   set(key, value) {
  91.     super.set([key], value);
  92.   }
  93. }
  94.  
  95. /**
  96.  * Settings object with localStorage as storage
  97.  */
  98. class Settings extends Container {
  99.   constructor(uid, def = {}) {
  100.     super();
  101.     this.uid = uid;
  102.     this.default = def;
  103.     this.load();
  104.   }
  105.   load() {
  106.     let settings = localStorage.getItem(this.uid);
  107.     if (settings) {
  108.       settings = JSON.parse(settings);
  109.       this.container = Tools.mergeDeep({}, this.default, settings);
  110.     } else {
  111.       this.container = this.default;
  112.     }
  113.   }
  114.   /**
  115.    * With jQuery:
  116.    *   $(window).on('beforeunload', () => SettingsInstance.save() );
  117.    */
  118.   save() {
  119.     localStorage.setItem(this.uid, JSON.stringify(this.container));
  120.   }
  121. }
  122.  
  123. /**
  124.  * Static functions
  125.  */
  126. class Tools {
  127.   /**
  128.    * Simple object check
  129.    * @param {Object} item
  130.    * @returns {Boolean}
  131.    */
  132.   static isObject(item) {
  133.     return (item && typeof item === 'object' && !Array.isArray(item));
  134.   }
  135.  
  136.   /**
  137.    * Deep merge objects
  138.    * @param {Object} target
  139.    * @param {Array} sources
  140.    */
  141.   static mergeDeep(target, ...sources) {
  142.     if (!sources.length) return target;
  143.     const source = sources.shift();
  144.  
  145.     if (Tools.isObject(target) && Tools.isObject(source)) {
  146.       for (const key in source) {
  147.         if (Tools.isObject(source[key])) {
  148.           if (!target[key]) Object.assign(target, { [key]: {} });
  149.           Tools.mergeDeep(target[key], source[key]);
  150.         } else {
  151.           Object.assign(target, { [key]: source[key] });
  152.         }
  153.       }
  154.     }
  155.     return Tools.mergeDeep(target, ...sources);
  156.   }
  157. }