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H2P: utils

针对 Date、localStorage 的操作

Verzia zo dňa 13.09.2020. Pozri najnovšiu verziu.

Tento skript by nemal byť nainštalovaný priamo. Je to knižnica pre ďalšie skripty, ktorú by mali používať cez meta príkaz // @require https://update.greasyfork.org/scripts/411278/847425/H2P%3A%20utils.js 

// ==UserScript==
// @name        H2P: utils
// @namespace   http://tampermonkey.net/
// @version     0.1.0
// @description 针对 Date、localStorage 的操作
// @author      H2P
// @compatible  chrome
// ==/UserScript==

((w) => {
  'use strict';

  /**
   * 在字符串前（后）添加 0
   * @param {String} s
   * @param {Number} len 
   * @param {Boolean} isAddFront 
   */
  function add0(s = '', len = 0, isAddFront = true) {
    s = s.toString();
    while (s.length < len) { s = isAddFront ? '0' + s : s + '0'; }
    return s;
  }

  w.$util = (() => {
    function Util() {
      /**
       * 键盘按键对应的 event code
       */
      this.keyCode = {
        'a': 65, 'b': 66, 'c': 67, 'd': 68, 'e': 69, 'f': 70, 'g': 71,
        'h': 72, 'i': 73, 'j': 74, 'k': 75, 'l': 76, 'm': 77, 'n': 78,
        'o': 79, 'p': 80, 'q': 81, 'r': 82, 's': 83, 't': 84,
        'u': 85, 'v': 86, 'w': 87, 'x': 88, 'y': 89, 'z': 90,
      }

      /**
       * 返回毫秒
       * @param {Number} num 
       */
      this.timeMS = (num = 0) => {
        num = Number.parseInt(num);
        return num < 946684800000 ? num * 1000 : num;
      }
  
      /**
       * localStorage 相关操作
       */
      this.LS = (() => {
        function LS() {
          this.init = (itemKey = '', itemPre = {}) => {
            let item = Object.assign({}, itemPre, this.get(itemKey));
            for (let key in item) { if (!(key in itemPre)) { delete item[key]; } }
            localStorage.removeItem(itemKey);
            localStorage.setItem(itemKey, JSON.stringify(item));
            return item;
          }
          this.set = (itemKey = '', item = {}) => { localStorage.setItem(itemKey, JSON.stringify(item)); },
          this.get = (itemKey = '') => JSON.parse(localStorage.getItem(itemKey)) || {},
          this.remove = (itemKey = '') => { localStorage.removeItem(itemKey); }
        }
        return new LS();
      })();
  
      this.HMS = (time = 0) => {
        time = this.timeMS(time);
        let h = Number.parseInt(time / 3600000);
        let m = Number.parseInt(time % 3600000 / 60000);
        let s = Number.parseInt(time % 3600000 % 60000 / 1000);
        return {
          h: add0(h, 2),
          m: add0(m, 2),
          s: add0(s, 2),
        }
      }
    }
    return new Util();
  })();

  // return millisecond
  Date.prototype.$timems = Date.prototype.getTime;
  // return second
  Date.prototype.$times = function() { return Number.parseInt(this.getTime() / 1000); }
  // format time: yyyy-MM-dd hh-mm-ss
  Date.prototype.$formatTime = function() { return `${this.getFullYear()}-${add0(this.getMonth() + 1, 2)}-${add0(this.getDate(), 2)} ${add0(this.getHours(), 2)}:${add0(this.getMinutes(), 2)}:${add0(this.getSeconds(), 2)}`; }
  // format date: yyyy-MM-dd
  Date.prototype.$formatDate = function() { return `${this.getFullYear()}-${add0(this.getMonth() + 1, 2)}-${add0(this.getDate(), 2)}`; } 

  /**
   * 根据 xpath 查询元素
   * @param {String} xpath 
   * @param {Boolean} queryOneElement 
   */
  w.$H2P = (xpath = 'body', queryOneElement = true) => queryOneElement ? document.querySelector(xpath) : Array.from(document.querySelectorAll(xpath));
})(window);