add encodeUserSid

app/extend/helper.js

@@ -451,6 +451,38 @@ module.exports = {
     }
 
     return parseInt(rtn) >> 2;
+  },
+
+  encodeUserSid(userSid) {
+    const rand = 'OU1WjLvZCrRJ7Yo0gE2XDjuuaSAUuaH1bhHPuMymcdfEeKz0igRhXQkMuLTm1';
+    const randKey = 2019;
+    let rtn = '';
+    const code = userSid << 2;
+    const randLength = 11;
+    const len = String(code).length;
+    const codeLen = rand.slice(0, randLength);
+    const codeNums = rand.slice(randLength, randLength + 12);
+    const codeExt = rand.slice(randLength + 12, rand.length);
+
+    const begin = codeLen.slice(len - 1, len);
+    const ext = randLength - len - 1;
+    let temp = String(Math.floor(code / randKey)).replace('.', '');
+    temp = temp.slice(-ext);
+
+    let arrExtTemp = codeExt.split('');
+    let arrExt = temp.split('');
+    for (const v of arrExt) {
+      rtn += arrExtTemp[v];
+    }
+
+    let arrNumsTemp = codeNums.split('');
+    let arrNums = String(code).split('');
+    for (const v of arrNums) {
+      rtn += arrNumsTemp[v];
+    }
+
+    rtn = begin + rtn;
+    return rtn;
   }
 
 };