/**
 * 字符操作工具类
 * @author cls
 * @date 2019-05-17
 */
import md5 from "js-md5";
import pinyin from 'js-pinyin';

export const StringUtil = {
    /**
    * showdoc
    * @catalog JS工具类/StringUtil
    * @title 获取随机字符串
    * @description 根据传入字符串长度,获取随机字符串id
    * @method static
    * @url import { StringUtil } from '@birt/funclib/StringUtil.js'
    * @param len 可选 随机字符长度
    * @return String 随机字符 
    */
    randomString(len) {
        len = len || 32;
        var $chars = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz012345678';
        var maxPos = $chars.length;
        var str = '';
        for (var i = 0; i < len; i++) {
            str += $chars.charAt(Math.floor(Math.random() * maxPos));
        }
        return str;
    },
    /**
    * showdoc
    * @catalog API/工具/String
    * @title 获取指定范围随机数
    * @description  获取中文全拼音
    * @url randomInt(min, max)
    * @method $instance.randomInt(min, max)
    * @param min 必选 Int 起止数字
    *  @param max 必选 Int 结束数字
    * @return String
    * @number 60  
    */
    randomInt: function (min, max) {
        var Range = max - min;
        var Rand = Math.random();
        return (min + Math.round(Rand * Range));
    },
    /**
       * showdoc
      * @catalog API/工具/String
       * @title 生成MD5
       * @description 生成MD5
       * @url md5(str)
       * @method $instance.md5(str)
       * @param str 必选 String 需生成的字符 
       * @return String
       * @number 60  
       */
    md5: function (str) {
        return md5(str);
    },
    /**
       * showdoc
      * @catalog API/工具/String
       * @title 获取GUID
       * @description  获取GUID
       * @url guid()
       * @method $instance.guid()
       * @return String
       * @number 60  
       */
    guid: function () {
        var nowDateTime = new Date();
        var myRandom1 = this.randomInt(1, 1000);
        var myRandom2 = this.randomInt(1, 1000);
        var myRandom3 = this.randomInt(1, 1000);
        var decodeStr = nowDateTime.valueOf() + "-"
            + nowDateTime.getMilliseconds() + "-" + myRandom1 + "-"
            + myRandom2 + "-" + myRandom3;
        var encodeStr = this.md5(decodeStr);
        var guid = encodeStr.substring(0, 8) + "-" + encodeStr.substring(8, 12)
            + "-" + encodeStr.substring(12, 16) + "-"
            + encodeStr.substring(16, 20) + "-"
            + encodeStr.substring(20, 32);
        return guid.toUpperCase();
    },
    /**
       * showdoc
      *  @catalog API/工具/String
       * @title 字符串非空
       * @description 判断字符串非空
       * @url isEmpty(obj)
       * @method StringUtil.isEmpty(obj)
       * @param obj 必选 Object 被判断对象 
       * @return Boolean
       * @number 60  
       */
    isEmpty(obj) {
        return (typeof obj === 'undefined' || obj === null || obj === "");
    },
    /**
      * showdoc
     *  @catalog API/工具/String
      * @title 获取首字母拼音
      * @description 获取首字母拼音
      * @url getCamelChars(label)
      * @method StringUtil.getCamelChars(label)
      * @param label 必选 String 中文字符 
      * @return String
      * @number 60  
      */
    getCamelChars(label) {
        return pinyin.getCamelChars(label || "")
    }
};