Util工具類(如時間轉換、計算時間星期、補足字符、流量kb轉換、大屏類)

/**
 * Util工具類
 */
const Util = {};

/**
 * 控制檯日誌打印
 */
Util.debug = function () {
  if (console && console.debug) {
    console.debug.apply(console, arguments);
  }
}

Util.log = function () {
  if (console && console.log) {
    console.log.apply(console, arguments);
  }
}

Util.info = function () {
  if (console && console.info) {
    console.info.apply(console, arguments);
  }
}

Util.warn = function () {
  if (console && console.warn) {
    console.warn.apply(console, arguments);
  }
}

Util.error = function () {
  if (console && console.error) {
    console.error.apply(console, arguments);
  }
}

/**
 * 左邊補足字符
 */
Util.leftPad = function (str, len, ch) {
  str = String(str);
  if (!ch && ch !== 0) ch = ' ';
  let i = -1;
  len = len - str.length;
  while (++i < len) str = ch + str;
  return str;
}

Util.isObject = function (obj) {
  return Object.prototype.toString.call(obj) === '[object Object]';
}

Util.isFunction = function (func) {
  return typeof func === 'function';
}

Util.isArray = function (array) {
  return Array.isArray(array);
}

Util.isNumber = function (number) {
  return typeof number === 'number' && isFinite(number);
}

Util.isString = function (string) {
  return string === string + ''
}

Util.isDate = function (date) {
  return Object.prototype.toString.call(date) === '[object Date]';
}

Util.encodeHtml = function (str) {
  if (!str || !str.length) return '';
  str = str.replace(/&/g, '&amp;');
  str = str.replace(/>/g, '&gt;');
  str = str.replace(/</g, '&lt;');
  str = str.replace(/"/g, '&quot;');
  str = str.replace(/'/g, '&#39;');
  return str;
}

Util.decodeHtml = function (str) {
  if (!str || !str.length) return '';
  str = str.replace(/&gt;/g, '>');
  str = str.replace(/&lt;/g, '<');
  str = str.replace(/&quot;/g, '"');
  str = str.replace(/&#39;/g, "'");
  str = str.replace(/&#039;/g, "'");
  str = str.replace(/&amp;/g, '&');
  return str;
}

Util.todayBegin = Util.todayStart = function () {
  let date = new Date();
  date.setHours(0);
  date.setMinutes(0);
  date.setSeconds(0);
  return date;
}

Util.nDaysBegin = Util.nDaysStart = function (days) {
  if (Util.isNumber(days)) {
    let today = Util.todayBegin().getTime();
    return new Date(today - days * 24 * 3600 * 1000);
  } else {
    return Util.todayBegin();
  }
}

Util.todayEnd = function () {
  let date = new Date();
  date.setHours(23);
  date.setMinutes(59);
  date.setSeconds(59);
  return date;
}

Util.nDaysEnd = function (days) {
  if (Util.isNumber(days)) {
    let today = Util.todayEnd().getTime();
    return new Date(today - days * 24 * 3600 * 1000);
  } else {
    return Util.todayEnd();
  }
}

Util.formatMonthDayHour = function (date) {
  if (date instanceof Date) {
    let mon = date.getMonth() + 1;
    let day = date.getDate();
    let hour = date.getHours();
    mon = mon > 9 ? mon : `0${mon}`;
    day = day > 9 ? day : `0${day}`;
    hour = hour > 9 ? hour : `0${hour}`;
    return `${mon}-${day} ${hour}:00`;
  } else if (Util.isNumber(date)) {
    return Util.formatMonthDayHour(new Date(date));
  } else {
    return date || 'N/A';
  }
}

Util.formatDate = function (date) {
  if (date instanceof Date) {
    let year = date.getFullYear();
    let mon = date.getMonth() + 1;
    let day = date.getDate();
    return year + '-' + (mon > 9 ? mon : '0' + mon) + '-' + (day > 9 ? day : '0' + day);
  } else if (Util.isNumber(date)) {
    const len = String(date).length;
    if (len === 10) date = date * 1000;
    if (len === 16) date = Math.floor(date / 1000);
    return Util.formatDate(new Date(date));
  } else {
    return date || 'N/A';
  }
}

Util.formatTime = function (date) {
  if (date instanceof Date) {
    let hour = date.getHours();
    let min = date.getMinutes();
    let sec = date.getSeconds();
    return (hour > 9 ? hour : '0' + hour) + ':' + (min > 9 ? min : '0' + min) + ':' + (sec > 9 ? sec : '0' + sec);
  } else if (Util.isNumber(date)) {
    return Util.formatTime(new Date(date));
  } else {
    return date || 'N/A';
  }
}

Util.formatDatetime = function (date) {
  if (date instanceof Date) {
    let year = date.getFullYear();
    let mon = date.getMonth() + 1;
    let day = date.getDate();
    let hour = date.getHours();
    let min = date.getMinutes();
    let sec = date.getSeconds();
    return year + '-' +
      (mon > 9 ? mon : '0' + mon) + '-' +
      (day > 9 ? day : '0' + day) + ' ' +
      (hour > 9 ? hour : '0' + hour) + ':' +
      (min > 9 ? min : '0' + min) + ':' +
      (sec > 9 ? sec : '0' + sec);
  } else if (Util.isString(date)) {
    const len = String(date).length;
    date = parseInt(date);
    if (date <= 0) return 'N/A';
    if (len === 10) date = date * 1000;
    if (len === 16) date = Math.floor(date / 1000);
    return Util.formatDatetime(new Date(date));
  } else if (Util.isNumber(date)) {
    const len = String(date).length;
    if (len === 10) date = date * 1000;
    if (len === 16) date = Math.floor(date / 1000);
    return Util.formatDatetime(new Date(date));
  } else {
    return date || 'N/A';
  }
}

Util.dateStrToSecond = function (dateStr) {
  if (dateStr instanceof Date) {
    return Math.floor(dateStr.getTime() / 1000);
  } else if (dateStr.length) { // 格式如2016-10-10 10:00:00
    try {
      let date = new Date(dateStr.replace(/-/g, '/'));
      return Math.floor(date.getTime() / 1000);
    } catch (e) {
      return 0;
    }
  } else {
    return 0;
  }
}

Util.calcDuration = function (seconds) {
  const reg = /^[0-9]+$/;
  if (!reg.test(String(seconds))) return '';
  let [s, d, h, m] = [parseInt(seconds), 0, 0, 0];
  let r = [];
  if (s >= 86400) {
    d = Math.floor(s / 86400);
    r.push(d + 'D');
  }
  if (s >= 3600) {
    h = Math.floor((s % 86400) / 3600);
    r.push(h + 'H');
  }
  if (s >= 60) {
    m = Math.floor(((s % 86400) % 3600) / 60);
    r.push(m + 'M');
  }
  if (s > 0) {
    s = Math.floor(s % 60);
    r.push(s + 'S');
  }
  return r.join('');
}

Util.toNumArr = function (start, end, step) {
  if (!Util.isNumber(start) || !Util.isNumber(end) || !Util.isNumber(step)) {
    return [];
  }
  let maxCount = 10000;
  let arr = [];
  while (start <= end && maxCount-- > 0) {
    arr.push(start);
    start += step;
  }
  return arr;
}

Util.getExt = function (path) {
  if (!path) return '';
  var pos = path.lastIndexOf('.');
  if (pos > 0 && pos < path.length) {
    return path.substr(pos + 1);
  }
  return '';
}

Util.subStr = function (str, len) {
  let slen = str && str.length || 0;
  if (len > 0 && slen > len) {
    return str.substr(0, len);
  }
  return str;
}

Util.copyProperties = function (obj) {
  if (!obj) return {};
  return Object.assign(obj, {});
}

Util.getTime = function (obj) {
  if (obj === null || obj === undefined) {
    return 0;
  } else if (obj instanceof Date) {
    return Math.floor(obj.getTime() / 1000);
  } else {
    let val = String(obj);
    if (val.length < 10) {
      return 0;
    } else if (/^[1-9][0-9]{9,}$/g.test(val)) {
      return parseInt(val.substr(0, 10));
    } else {
      val = val.replace(/-/g, '/');
      try {
        let date = new Date(val);
        return date ? Math.floor(date.getTime() / 1000) : 0;
      } catch (e) {
        return 0;
      }
    }
  }
}

Util.array2ParamObj = function (paramKey, array) {
  if (!Array.isArray(array)) return {};
  paramKey = paramKey || 'array';
  let paramObj = {};
  array.forEach((item, index) => {
    Object.keys(item).forEach(key => {
      let k = `${paramKey}[${index}].${key}`;
      let v = item[key];
      paramObj[k] = v;
    });
  });
  return paramObj;
}

Util.percent = function (value, total) {
  value = parseInt(value || 0);
  if (value === 0) return 0;
  total = parseInt(total || 0);
  if (total === 0) return 100;
  let percent = String(Math.round(value / total * 10000) / 100.00);
  if (percent.length > 5) {
    percent = percent.substr(0, 5);
  }
  return parseFloat(percent);
}

Util.isIE = function () {
  return !!window.ActiveXObject || 'ActiveXObject' in window;
}

Util.ieVersion = function () {
  let win = window;
  let doc = window.document;
  let input = doc.createElement('input');
  if (win.ActiveXObject === undefined) return null;
  if (!win.XMLHttpRequest) return 6;
  if (!doc.querySelector) return 7;
  if (!doc.addEventListener) return 8;
  if (!win.atob) return 9;
  // "!doc.body.dataset" is faster but the body is null when the DOM is not
  // ready. Anyway, an input tag needs to be created to check if IE is being emulated.
  if (!input.dataset) return 10;
  return 11;
}

Util.fullscreen = function () {
  try {
    var docElm = document.documentElement;
    if (docElm.requestFullscreen) { // W3C
      docElm.requestFullscreen();
    } else if (docElm.mozRequestFullScreen) { //FireFox
      docElm.mozRequestFullScreen();
    } else if (docElm.webkitRequestFullScreen) { //Chrome等
      docElm.webkitRequestFullScreen();
    } else if (docElm.msRequestFullscreen) { //IE11
      docElm.msRequestFullscreen();
    }
  } catch (e) {
    console && console.error && console.error(e);
  }
}

Util.exitFullscreen = function () {
  try {
    if (document.exitFullscreen) {
      document.exitFullscreen();
    } else if (document.mozCancelFullScreen) {
      document.mozCancelFullScreen();
    } else if (document.webkitCancelFullScreen) {
      document.webkitCancelFullScreen();
    } else if (document.msExitFullscreen) {
      document.msExitFullscreen();
    }
  } catch (e) {
    console && console.error && console.error(e);
  }
}

Util.base64Encode = function (input) {
  let rv = encodeURIComponent(input);
  rv = unescape(rv);
  rv = window.btoa(rv);
  return rv;
}

Util.base64Decode = function (input) {
  let rv = window.atob(input);
  rv = escape(rv);
  rv = decodeURIComponent(rv);
  return rv;
}

Util.isArrayRepeat = function (array) {
  if (!Array.isArray(array)) return false;
  let map = {};
  for (let i = 0; i < array.length; i++) {
    let key = String(array[i]);
    if (map.hasOwnProperty(key)) {
      return true;
    } else {
      map[key] = 1;
    }
  }
  map = null;
  return false;
}

Util.width = function (id) {
  let ele = document.getElementById(id);
  return ele && ele.clientWidth || 0;
}

Util.height = function (id) {
  let ele = document.getElementById(id);
  return ele && ele.clientHeight || 0;
}

Util.arraySum = function (array) {
  if (!Array.isArray(array) || array.length === 0) return 0;
  let total = 0;
  array.forEach(o => {
    total += parseInt(o);
  });
  return total;
}

Util.downloadCsv = function (csvName, csvContent) {
  if (!csvName) return;
  // BOM防止亂碼
  var BOM = '\uFEFF';
  csvContent = BOM + csvContent;
  var a = document.createElement('a');
  a.href = 'data:attachment/csv,' + encodeURI(csvContent);
  a.target = '_blank';
  a.download = csvName.toLowerCase().endsWith('.csv') ? csvName : csvName + '.csv';
  document.body.appendChild(a);
  a.click();
  document.body.removeChild(a);
}

Util.parseTime = function (time, cFormat) {
  if (arguments.length === 0) {
    return null
  }
  const format = cFormat || '{y}-{m}-{d} {h}:{i}:{s}'
  let date
  if (typeof time === 'object') {
    date = time
  } else {
    if (('' + time).length === 10) time = parseInt(time) * 1000
    date = new Date(time)
  }
  const formatObj = {
    y: date.getFullYear(),
    m: date.getMonth() + 1,
    d: date.getDate(),
    h: date.getHours(),
    i: date.getMinutes(),
    s: date.getSeconds(),
    a: date.getDay()
  }
  const timeStr = format.replace(/{(y|m|d|h|i|s|a)+}/g, (result, key) => {
    let value = formatObj[key]
    if (key === 'a') return ['一', '二', '三', '四', '五', '六', '日'][value - 1]
    if (result.length > 0 && value < 10) {
      value = '0' + value
    }
    return value || 0
  })
  return timeStr
}

Util.wrapStr = function (str, lineLen, separator) {
  if (!str || lineLen <= 0) return '';
  separator = separator || '<br>';
  let index = 0;
  const result = [];
  while (index < str.length) {
    const sub = str.substr(index, lineLen);
    if (!sub) {
      break;
    }
    result.push(sub);
    if (sub.length < lineLen) {
      break;
    }
    index += lineLen;
  }
  return result.join(separator);
}

Util.isJsonStr = function (str) {
  if (!str) return false;
  if (typeof str === 'string') {
    try {
      const obj = JSON.parse(str);
      return obj && typeof obj === 'object';
    } catch (e) {
      return false;
    }
  }
}

Util.byteMBtoGB = function (num) {
  if (!num) return 0
  num = parseFloat(num) / 1024
  return Math.round(num * 100.0) / 100
}

export default Util;

用法如最近一個月時間：Util.nDaysBegin(29) Util.todayEnd()