Update lib/snapsave/util.js

lib/snapsave/util.js

@@ -13,25 +13,21 @@ export function getDecodedSnapSave(data) {
 
 export function decryptSnapSave(data) {
     const args = getEncodedSnapSave(data);
-    if (args.length === 0) {
-        throw new Error("Failed to extract encoded SnapSave data.");
+    if (args.length < 6) {
+        throw new Error("Invalid SnapSave decryption arguments.");
     }
     const decoded = decodeSnapSave(...args);
     return getDecodedSnapSave(decoded);
 }
 
 export function decodeSnapSave(...args) {
-    if (args.length < 6) {
-        throw new Error("Invalid SnapSave decryption arguments.");
-    }
-
     let [h, u, n, t, e, r] = args;
-    
+
     function decode(d, e, f) {
         const g = '0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ+/'.split('');
         let h = g.slice(0, e);
         let i = g.slice(0, f);
-        
+
         let j = d.split('').reverse().reduce((a, b, c) => {
             let index = h.indexOf(b);
             return index !== -1 ? a + index * Math.pow(e, c) : a;
@@ -45,9 +41,10 @@ export function decodeSnapSave(...args) {
         return k || '0';
     }
 
-    let t = '';
+    // Remove duplicate `let r`
+    let result = '';
     for (let i = 0, len = h.length; i < len; i++) {
-        let s = "";
+        let s = '';
         while (h[i] !== n[e]) {
             s += h[i];
             i++;
@@ -55,8 +52,8 @@ export function decodeSnapSave(...args) {
         for (let j = 0; j < n.length; j++) {
             s = s.replace(new RegExp(n[j], "g"), j.toString());
         }
-        t += String.fromCharCode(decode(s, e, 10) - t);
+        result += String.fromCharCode(decode(s, e, 10) - t);
     }
 
-    return decodeURIComponent(encodeURIComponent(t));
-}
+    return decodeURIComponent(encodeURIComponent(result));
+}