app-base-web/.src/library/util-string/index.js

web development common base package.

/**
 * @module string
 */
import crypto from 'crypto'

let str2asc = function (strstr) {
  return ("0" + strstr.charCodeAt(0).toString(16)).slice(-2);
};
let asc2str = function (ascasc) {
  return String.fromCharCode(ascasc);
};
module.exports = {
  /**
   * 生成uuid
   * @return {string}
   */
  uuid: function () {
    let S4 = function () {
      return (((1 + Math.random()) * 0x10000) | 0).toString(16).substring(1);
    };
    return (S4() + S4() + S4() + S4() + S4() + S4() + S4() + S4());
  },
  md5: function (val) {
    return crypto.createHash('md5').update(val).digest("hex")
  },
  /**
   * 获取随机数字字符组合
   * @param len {number} 长度
   * @return {string}
   */
  randomCode: function (len) {
    var code = ''
    const random = [0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 'A', 'B', 'C', 'D', 'E', 'F', 'G', 'H', 'I', 'J', 'K', 'L', 'M', 'N', 'O', 'P', 'Q', 'R', 'S', 'T', 'U', 'V', 'W', 'X', 'Y', 'Z']
    for (let i = 0; i < len; i++) {
      //设置随机数范围,这设置为0 ~ 36
      let index = Math.floor(Math.random() * 36);
      code += random[index];
    }
    return code
  },
  /**
   * 编码
   * @param str {string}
   * @param k {number} 秘钥
   * @return {string}
   */
  encrypt: function (str, k) {
    let string = "";
    for (let i = 0; i < str.length; i++) {
      let c = str.charCodeAt(i);
      if (c >= 97 && c <= 122) {
        c += k % 26;
        if (c < 97) {
          c += 26;
        }
        if (c > 122) {
          c -= 26;
        }
      } else if (c >= 65 && c <= 90) {
        c += k % 26;
        if (c < 65) {
          c += 26;
        }
        if (c > 122) {
          c -= 26;
        }
      }
      string += String.fromCharCode(c);
    }
    return string;
  },
  /**
   * 解码
   * @param str {string}
   * @param n {number|string} 秘钥
   * @return {string}
   */
  decrypt: function (str, n) {
    let string = "";
    let k = parseInt("-" + n);
    for (let i = 0; i < str.length; i++) {
      let c = str.charCodeAt(i);
      if (c >= 97 && c <= 122) {
        c += k % 26;
        if (c < 97) {
          c += 26;
        }
        if (c > 122) {
          c -= 26;
        }
      } else if (c >= 65 && c <= 90) {
        c += k % 26;
        if (c < 65) {
          c += 26;
        }
        if (c > 122) {
          c -= 26;
        }
      }
      string += String.fromCharCode(c);
    }
    return string;
  },
  /**
   * 检测密码强度
   * @param str {string}
   * @return {number}
   */
  checkPwd: function (str) {
    let Lv = 0;
    if (str.length < 6) {
      return Lv
    }
    if (/[0-9]/.test(str)) {
      Lv++
    }
    if (/[a-z]/.test(str)) {
      Lv++
    }
    if (/[A-Z]/.test(str)) {
      Lv++
    }
    if (/[.|-|_]/.test(str)) {
      Lv++
    }
    return Lv;
  },
  /**
   * 移除字符
   * @param str {string}
   * @param character {string}
   * @return {string}
   */
  remove: function (str, character) {
    return str.replace(character, '');
  },
  /**
   * 替换字符
   * @param str {string}
   * @param character {string}
   * @param replacement {string}
   * @return {string}
   */
  replace: function (str, character, replacement) {
    return str.replace(character, replacement);
  },
  /**
   * 省略号
   * @param str {string}
   * @param len {number}
   * @return {string}
   */
  ellipsis: function (str, len) {
    if (str) {
      if (str.length > len) return str.substring(0, len) + "...";
      return str
    }
    return
  },
  /**
   * 过滤html代码(把<>转换)
   * @param str {string}
   * @return {string}
   */
  filterTag: function (str) {
    str = str.replace(/&/ig, "&amp;");
    str = str.replace(/</ig, "&lt;");
    str = str.replace(/>/ig, "&gt;");
    str = str.replace(/\//ig, "&#x2F;");
    str = str.replace(/\s/ig, "&nbsp;");
    return str;
  },
  /**
   * 过滤<script></script>转换
   * @param str {string}
   * @return {string}
   */
  filterScript: function (str) {
    return str.replace(/(<script)/ig, "&lt;script").replace(/(<script>)/ig, "&lt;script&gt;").replace(/(<\/script>)/ig, "&lt;/script&gt;");
  },
  /**
   * 获取十六进制随机颜色
   * @return {string}
   */
  getRandomColor: function () {
    return '#' + ((h) => {
      return new Array(7 - h.length).join("0") + h;
    })((Math.random() * 0x1000000 << 0).toString(16));
  },
  /**
   * DOM转字符串
   * @param htmlDOM {Element}
   * @return {string}
   */
  domToString: function (htmlDOM) {
    let div = document.createElement("div");
    div.appendChild(htmlDOM);
    return div.innerHTML
  },
  /**
   * 字符串转DOM
   * @param htmlString {string}
   * @return {Element}
   */
  stringToDom: function (htmlString) {
    let div = document.createElement("div");
    div.innerHTML = htmlString;
    return div.children[0];
  },



  checkPassword: function (str) {
    if (str.length < 6) {
      return -1;
    }
    if (/[a-zA-Z]+/.test(str) && /[0-9]+/.test(str) && /\W+\D+/.test(str)) {
      return 3;
    }
    if (/[a-zA-Z]+/.test(str) && /[0-9]+/.test(str)) {
      return 2;
    }
    if (/\[a-zA-Z]+/.test(str) && /\W+\D+/.test(str)) {
      return 2;
    }
    if (/[0-9]+/.test(str) && /\W+\D+/.test(str)) {
      return 2;
    }
    return -1;
  },

  startWith: function (str, prefix) {
    return str.slice(0, prefix.length) === prefix;
  },

  endsWith: function (str, suffix) {
    return str.indexOf(suffix, str.length - suffix.length) !== -1;
  },
	/*
	 * @Description: undefined字符串返回空，否则返回原字符串 @ param str @ return str @date
	 * 2015-12-31 @author:kfzx-fenggq
	 */
  isNil: function (str) {
    if (str == undefined || str == null)
      str = '';
    return str;
  },

	/*
	 * @Description: undefined字符串返回then，否则返回原字符串 @ param str * @ return str
	 * @date 2015-12-31 @author:kfzx-fenggq
	 */
  isNil: function (str, then) {
    if (str == undefined || str == null)
      str = then;
    return str;
  },


	/*
	 * @Description: 判断字符串是否为空 @ param str @ return boolean @date 2015-12-31
	 * @author:kfzx-fenggq
	 */
  isBlank: function (str) {
    if ($.type(str) == 'boolean')
      return str;
    if (str === undefined || str === null || str === '')
      return true;
    return false;
  },
  isEmptyObj: function (obj) {
    var key;
    for (key in obj)
      return !1;
    return !0
  },
	/*
	 * @Description:
	 * 使用参数替换指定字符串中的参数标志，字符串中的参数标识形如（数字1：对应的参数以分号隔开，第一个对应的参数标识0，后面的逐个加1 @ param
	 * str @ return String @date 2015-12-31 @author:kfzx-fenggq
	 */
  strUseParam: function (str, params) {
    var replaceStr = "";
    var separator = ";";
    var paramArr = params.toString().split(separator);
    for (var i = 0; i < paramArr.length; i++) {
      replaceStr = new RegExp("\\[" + i + "\\]", "g");
      str = str.replace(replaceStr, paramArr);
    }
    return str;
  },
	/*
	 * @Description: 字符串的第一个字母大写 @ param str @ return String @date 2015-12-31
	 * @author:kfzx-fenggq
	 */
  upperFirst: function (str) {
    if (str.length > 0) {
      str = str.substr(0, 1).toUpperCase() + str.substr(1);
    }
    return str;
  },

  upper_: function (str) {
    while (str.indexOf("_") >= 0) {
      var left = str.substr(0, str.indexOf("_"));
      var right = str.substr(str.indexOf("_") + 1);
      right = right.substr(0, 1).toUpperCase() + right.substr(1);
      str = left + right;
    }
    return str;
  },
  upperTo_: function (str) {
    var rs = "";
    for (var i = 0; i < str.length; i++) {
      var c = str.charAt(i);
      if (c > 'A' && c < 'Z') {
        rs += "_" + c.toLowerCase();
      } else {
        rs += c;
      }
    }
    return rs;
  },
  startWith: function (stirng, str) {
    var reg = new RegExp("^" + str);
    return reg.test(stirng);
  },
  endWith: function (stirng, str) {
    var reg = new RegExp(str + "$");
    return reg.test(stirng);
  },

  UrlEncode: function (str) {
    var ret = "";
    var strSpecial = "!\"#$%&'()*+,/:;<=>?[]^`{|}~%";
    var tt = "";
    for (var i = 0; i < str.length; i++) {
      var chr = str.charAt(i);
      var c = str2asc(chr);
      tt += chr + ":" + c + "n";
      if (parseInt("0x" + c) > 0x7f) {
        ret += "%" + c.slice(0, 2) + "%" + c.slice(-2);
      } else {
        if (chr == " ") {
          ret += "+";
        } else if (strSpecial.indexOf(chr) != -1) {
          ret += "%" + c.toString(16);
        } else {
          ret += chr;
        }
      }
    }
    return ret;
  },
  UrlDecode: function (str) {
    var ret = "";
    for (var i = 0; i < str.length; i++) {
      var chr = str.charAt(i);
      if (chr == "+") {
        ret += " ";
      } else if (chr == "%") {
        var asc = str.substr(i + 1, i + 3);
        if (parseInt("0x" + asc) > 0x7f) {
          ret += asc2str(parseInt("0x" + asc + str.substr(i + 4, i + 6)));
          i += 5;
        } else {
          ret += asc2str(parseInt("0x" + asc));
          i += 2;
        }
      } else {
        ret += chr;
      }
    }
    return ret;
  },


  delTag: function (str) {
    var rs = "";
    try {
      if (typeof str == 'string') {
        rs = str.replace(/<[^>]+>/g, "");//去掉所有的html标记 
      } else {
        rs = str;
      }
    } catch (e) {
      return "";
    }
    return rs;
  },
  toString: function (arr, separator) {
    if (!separator) separator = " / ";
    if (!arr) return "";
    if (!(arr instanceof Array)) {
      arr = JSON.parse(arr);
    }
    let rs = "";
    for (let i = 0; i < arr.length; i++) {
      if (i == 0) {
        rs = arr[i]
      } else {
        rs = rs + separator + arr[i];
      }
    }
    return rs;
  },

}