export class StringUtil {
    
    /**小数转成保留几位小数的字符串*/
    public static ToFixed(s:number,count:number):string{
        return s.toFixed(count).toString();
    }
    
    /**秒转成 00:00时间格式*/
    public static ToTimeString(s:number):string{
         s = Math.floor(s);
         let m = Math.floor(s/60);
         s=s-m*60;  
         let mm=m.toString();
         if(mm.length<=1){
            mm = "0".concat(mm);
         }
         if(s<10){
            return  `${mm}:${"0".concat(s.toString())}`;
         }
         return  `${mm}:${s}`;
    }
    /**秒*/
    public static ToSce(s:number,u:string="s"):string{
        s = Math.floor(s);
        return  `${s}${u}`;
   }
    /**货币值转字符 */
    public static ToMoneyString(n:number):string{
        if(n>1000000){
            let m=Math.floor(n*0.000001);
            n-=m*1000000;
            if(n>1000){
               return `${m}M${Math.floor(n*0.001)}K`;
            }
            return `${m}M`;
        }else if(n>1000){
            let m=Math.floor(n*0.001);
            n-=m*1000;
            if(n>100){
               n=Math.floor(n*0.01);
               return `${m}K${n}`; 
            }
            return `${m}K`; 
        }
        return n.toString();
    }
    /**毫秒转秒显示*/
    public static MS2S(ms:number):string{
        return (ms*0.001).toFixed(1);
    }
    /**
     * 去掉前后空格
     * @param str
     * @returns {string}
     */
    public trimSpace(str: string): string {
        return str.replace(/^\s*(.*?)[\s\n]*$/g, '$1');
    }

    /**
     * 获取字符串长度，中文为2
     * @param str
     */
    public getStringLength(str: string): number {
        var strArr = str.split("");
        var length = 0;
        for (var i = 0; i < strArr.length; i++) {
            var s = strArr[i];
            if (this.isChinese(s)) {
                length += 2;
            } else {
                length += 1;
            }
        }
        return length;
    }

    /**
     * 判断一个字符串是否包含中文
     * @param str
     * @returns {boolean}
     */
    public isChinese(str: string): boolean {
        var reg = /^.*[\u4E00-\u9FA5]+.*$/;
        return reg.test(str);
    }

    /**
     * 格式化字符串 "{0},{1}.format("text0","text1")
     */
    public format(val: string, ...param: any[]): string {
        for (let i = 0, len = param.length; i < len; i++) {
            let reg = new RegExp("({)" + i + "(})", "g");
            val = val.replace(reg, param[i]);
        }
        return val;
    }
}