fix: refactor utils and av2bv

saveweb · Jan 26, 2025 · 46d3121 · 46d3121
1 parent 59b6e69
commit 46d3121
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Showing 2 changed files with 156 additions and 142 deletions.
diff --git a/src/lib/server/av2bv.js b/src/lib/server/av2bv.js
@@ -8,6 +8,7 @@ const BASE = 58n;
 
 const data = 'FcwAPNKTMug3GV5Lj7EJnHpWsx4tb8haYeviqBz6rkCy12mUSDQX9RdoZf';
 
+/** @type { (aid: string | number) => string } */
 export function av2bv(aid) {
   const bytes = ['B', 'V', '1', '0', '0', '0', '0', '0', '0', '0', '0', '0'];
   let bvIndex = bytes.length - 1;
@@ -22,11 +23,12 @@ export function av2bv(aid) {
   return bytes.join('');
 }
 
+/** @type { (bvid: string) => number } */
 export function bv2av(bvid) {
   const bvidArr = Array.from(bvid);
   [bvidArr[3], bvidArr[9]] = [bvidArr[9], bvidArr[3]];
   [bvidArr[4], bvidArr[7]] = [bvidArr[7], bvidArr[4]];
   bvidArr.splice(0, 3);
   const tmp = bvidArr.reduce((pre, bvidChar) => pre * BASE + BigInt(data.indexOf(bvidChar)), 0n);
   return Number((tmp & MASK_CODE) ^ XOR_CODE);
-}
+}