2BTV-Web/src/util/Utils.js

import Consts from "./Consts";

class Utils {
    static twoDecimal_f(x) {
        var f_x = parseFloat(x);
        if (isNaN(f_x)) {
            console.error('Utils.twoDecimal_f -> parameter error', x);
            return '';
        }
        var f_x = Math.round(x * 100) / 100;
        var s_x = f_x.toString();
        var pos_decimal = s_x.indexOf('.');
        if (pos_decimal < 0) {
            pos_decimal = s_x.length;
            s_x += '.';
        }
        while (s_x.length <= pos_decimal + 2) {
            s_x += '0';
        }
        return s_x;
    }

    /**
     * 给数字字符串的整数部分打上千分位隔断标识
     */
    static thousandthFormat(n) {
      if (!n) {
        return n;
      }
      try {
        let n_str = n.toString();
        let result = '';
        let int_str = n_str.split('.')[0];
        let f_str = n_str.split('.')[1];
        while (int_str.length > 3) {
          result = ',' + int_str.slice(-3) + result;
          int_str = int_str.slice(0, int_str.length - 3);
        }
        result = int_str + result + '.' + f_str;
        return result;
      } catch(e) {
        return n;
      }
    }

    static getStrLength(str) {
        return str.replace(/[\u0391-\uFFE5]/g, "aa").length;
    }

    static isOverflow(str, keepLength) {
        return Utils.getStrLength(str) > keepLength;
    }

    static fixOverflowStr(str, keepLength, suffix) {
        function getSubString(str, keepLength) {
            var realLength = 0;
            var charCode = -1;
            var newStr = '';
            for (var i = 0; i < str.length; i++) {
                charCode = str.charCodeAt(i);
                realLength += charCode >= 0 && charCode <= 128 ? 1 : 2;
                if (realLength >= keepLength) {
                    break;
                }
                newStr += str.charAt(i);
            }
            return newStr;
        }

        if (!Utils.isOverflow(str, keepLength)) {
            return str;
        }
        return getSubString(str, keepLength - suffix.length) + suffix;
    }

    static generateUrl(src, type){
        if('/' != src[0])
        {
          src = '/' + src;
        }

        if ('img' == type){
            return Consts.IMG_PATH + src;
        }
        else if ('video' == type) {
          return Consts.VIDEO_PATH + src;
        }
        return src;
    }

    static createMoyeEvent(eventType){
      let e = document.createEvent('Event');
      if(moye.isAtv)
      {
          //Atv event
          if(Consts.EVENT_TYPE_OK == eventType){
            e.initEvent('ok', true, true);
            e.keyCode = moye.keyCodes.ENTER;
            return e;
          }
      }
      else{
        if(Consts.EVENT_TYPE_OK == eventType){
          //非Atv的onOK, 监听的是ENTER的keyup事件
          e.initEvent('keyup', true, true);
          e.keyCode = moye.keyCodes.ENTER;
          return e;
        }
      }
      return null;
    }

    /*
    fire event for target dom node
    */
    static fireEventById(nodeID, eventType){
      //alert('fireEventById Begin!');
      let srcNode = document.getElementById(nodeID);
      if(!srcNode){
        console.log('Cannot Find Target Node, nodeID=%s', nodeID);
        //alert('Cannot Find Target Node, nodeID='+nodeID);
        return false;
      }
      let targetEvent = Utils.createMoyeEvent(eventType);
      if(!targetEvent){
        return false;
      }
      srcNode.dispatchEvent(targetEvent);
      return true;
    }

    //日期格式化输出
    static dateFormat(dateObj, format){
       let date = {
          "M+": dateObj.getMonth() + 1,
          "d+": dateObj.getDate(),
          "h+": dateObj.getHours(),
          "m+": dateObj.getMinutes(),
          "s+": dateObj.getSeconds(),
          "q+": Math.floor((dateObj.getMonth() + 3) / 3),
          "S+": dateObj.getMilliseconds()
       };
       if (/(y+)/i.test(format)) {
          format = format.replace(RegExp.$1, (dateObj.getFullYear() + '').substr(4 - RegExp.$1.length));
       }
       for (let k in date) {
          if (new RegExp("(" + k + ")").test(format)) {
             format = format.replace(RegExp.$1, RegExp.$1.length == 1
                    ? date[k] : ("00" + date[k]).substr(("" + date[k]).length));
          }
       }
       return format;
    }

    static trimJsonStr(src){
        //所有"'" 替换为"\""
        if(typeof(src) == "string"){
            return src.replace(new RegExp("'","gm"), "\"");
        }
        return src;
    }

	/**
	 * @desc uuid生成器
	 */
	static uuid(len, radix) {
		let chars = '0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz';
		let uuid = [];
		radix = radix || chars.length;
		if (len) {
			for(let i = 0; i < len; i++) {
				uuid[i] = chars[0 | Math.random()*radix];
			}
		} else {
			//默认,rfc4122协议类型
			let r;
			//以下位置的字符串固定
			uuid[8] = uuid[13] = uuid[18] = uuid[13];
			uuid[14] = '4';
			for (let i = 0; i < 36; i++) {
				if (!uuid[i]) {
					r = 0 | Math.random()*16;
					uuid[i] = chars[(i == 19) ? (r & 0x3) | 0x8 : r];
				}
			}
		}
		return uuid.join('');
	}

    static getUuidForWeb() {
        const uuid = Utils.uuid(32);
        const start = uuid.slice(0,8);
        const next = uuid.slice(8,12);
        const nextNext = uuid.slice(13,17);
        const last = uuid.slice(17,32);
        return `${start}-${next}-${nextNext}-${last}`;
    }

    static videoUrlFormat(url) {
        if (!url) { return; }
        if (url.startsWith('http')) {
            return url.replace('http://ljvideo.ai160.com', Consts.VIDEO_PATH);
        } else if (url.startsWith('https')) {
            return url.replace('https', 'http');
        } else {
            return url;
        }
    }
}

export default Utils;