class Cipher
{
 static str2HexStr(str)
 {
 if(str === "")
 return "";
 var hexCharCode = [];
 for(var i = 0; i < str.length; i++) {
 hexCharCode.push((str.charCodeAt(i)).toString(16));
 }
 return hexCharCode.join("").toUpperCase();
 }

 static hexStr2Str(hexCharCodeStr)
 {
 var rawStr = hexCharCodeStr.trim();
 var len = rawStr.length;
 if(len % 2 !== 0) {
 console.log("Illegal Format ASCII Code!");
 return "";
 }
 var curCharCode;
 var resultStr = [];
 for(var i = 0; i < len;i = i + 2) {
 curCharCode = parseInt(rawStr.substr(i, 2), 16);
 resultStr.push(String.fromCharCode(curCharCode));
 }
 return resultStr.join("");
 }

 static randomString(len) {
 len = len || 32;
 var $chars = 'ABCDEFGHJKMNPQRSTWXYZabcdefhijkmnprstwxyz2345678'; /****默认去掉了容易混淆的字符oOLl,9gq,Vv,Uu,I1****/
 var maxPos = $chars.length;
 var pwd = '';
 var i = 0;
 for (i = 0; i < len; i++) {
 pwd += $chars.charAt(Math.floor(Math.random() * maxPos));
 }
 return pwd;
 }
 
 static urlencode(str) {
 let strArr = [];
 let output = '';
 strArr = Array.from(str);
 for (let v of strArr) {
 let regRule = /\uD83C[\uDF00-\uDFFF]|\uD83D[\uDC00-\uDE4F]/g;
 output += v.match(regRule) ? encodeURIComponent(v) : this.encodeNoEmoji(v);
 }
 return output;
 }
 
 static encodeNoEmoji(str) {
 var output = '';
 var x = 0;
 str = this.utf16to8(str.toString());
 var regex = /(^[a-zA-Z0-9-_.]*)/;
 while (x < str.length) {
 var match = regex.exec(str.substr(x));
 if (match !== null && match.length > 1 && match[1] !== '') {
 output += match[1];
 x += match[1].length;
 } else {
 if (str[x] === '')
 output += '+';
 else {
 var charCode = str.charCodeAt(x);
 var hexVal = charCode.toString(16);
 output += '%' + ( hexVal.length < 2 ? '0' : '' ) + hexVal.toUpperCase();
 }
 x++;
 }
 }
 return output;
 }
 
 static utf16to8(str) {
 var out, i, len, c;
 out = "";
 len = str.length;
 for(i = 0; i < len; i++) {
 c = str.charCodeAt(i);
 if ((c >= 0x0001) && (c <= 0x007F)) {
 out += str.charAt(i);
 } else if (c > 0x07FF) {
 out += String.fromCharCode(0xE0 | ((c >> 12) & 0x0F));
 out += String.fromCharCode(0x80 | ((c >> 6) & 0x3F));
 out += String.fromCharCode(0x80 | ((c >> 0) & 0x3F));
 } else {
 out += String.fromCharCode(0xC0 | ((c >> 6) & 0x1F));
 out += String.fromCharCode(0x80 | ((c >> 0) & 0x3F));
 }
 }
 return out;
 }
}

export default Cipher