From e24ccc16fae4cb252c65c8188a4f096a94cc44d2 Mon Sep 17 00:00:00 2001
From: guozhigq <guozhigq@outlook.com>
Date: Thu, 1 Feb 2024 00:32:52 +0800
Subject: [PATCH] =?UTF-8?q?mod:=20av2bv=E6=96=B9=E6=B3=95=E4=BF=AE?=
 =?UTF-8?q?=E6=94=B9?=
MIME-Version: 1.0
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---
 lib/utils/id_utils.dart | 23 ++++++++++++++++++-----
 1 file changed, 18 insertions(+), 5 deletions(-)

diff --git a/lib/utils/id_utils.dart b/lib/utils/id_utils.dart
index d0451b173..906f63481 100644
--- a/lib/utils/id_utils.dart
+++ b/lib/utils/id_utils.dart
@@ -13,7 +13,20 @@ class IdUtils {
 
   /// av转bv
   static String av2bv(int aid) {
-    List<String> bytes = List.filled(12, '0', growable: false);
+    List<String> bytes = [
+      'B',
+      'V',
+      '1',
+      '0',
+      '0',
+      '0',
+      '0',
+      '0',
+      '0',
+      '0',
+      '0',
+      '0'
+    ];
     int bvIndex = bytes.length - 1;
     BigInt tmp = (MAX_AID | BigInt.from(aid)) ^ XOR_CODE;
     while (tmp > BigInt.zero) {
@@ -21,13 +34,13 @@ class IdUtils {
       tmp = tmp ~/ BASE;
       bvIndex -= 1;
     }
-    final tmpValue = bytes[3];
+    String tmpSwap = bytes[3];
     bytes[3] = bytes[9];
-    bytes[9] = tmpValue;
+    bytes[9] = tmpSwap;
 
-    final tmpValue2 = bytes[4];
+    tmpSwap = bytes[4];
     bytes[4] = bytes[7];
-    bytes[7] = tmpValue2;
+    bytes[7] = tmpSwap;
 
     return bytes.join();
   }