add default username for cellphone

plugins/Common.php

@@ -33,7 +33,8 @@ Class Common {
 
         try {
             $rootDir = __DIR__ . '/../www/' . FSC::$app['config']['content_directory'];
-            $userDir = "{$rootDir}{$cellphone}";
+            $username = self::getMappedUsername($cellphone);
+            $userDir = "{$rootDir}{$username}";
             mkdir("{$userDir}/data/", 0755, true);      //分享视频目录
             if (!is_dir("{$userDir}/data/")) {
                 throw new Exception("创建用户数据目录失败，请检查目录 www/" . FSC::$app['config']['content_directory'] . " 权限配置，允许PHP写入");
@@ -46,6 +47,8 @@ Class Common {
             if (!empty($friends_code)) {
                 file_put_contents("{$userDir}/README_friendscode.txt", $friends_code);
             }
+
+            file_put_contents("{$userDir}/README_cellphone.txt", $cellphone);
         }catch(Exception $e) {
             throw new Exception("创建用户数据目录失败：" . $e->getMessage());
         }
@@ -53,12 +56,26 @@ Class Common {
         return true;
     }
 
+    //根据手机号码获取用户名ID
+    //规则：前6位对 97 求余数，再拼接后5位
+    public static function getUserId($cellphone){
+        $user_id = $cellphone;
+
+        $prefix = substr($cellphone, 0, 6);
+        $prefix = str_pad( (int)$prefix % 97, 2, '0', STR_PAD_LEFT);
+        $suffix = substr($cellphone, -5);
+
+        return "{$prefix}{$suffix}";
+    }
+
     //根据手机号码获取映射的用户名
     public static function getMappedUsername($cellphone){
         $username = $cellphone;
 
         if (!empty(FSC::$app['config']['tajia_user_map']) && !empty(FSC::$app['config']['tajia_user_map'][$username])) {
             $username = FSC::$app['config']['tajia_user_map'][$username];
+        }else {
+            $username = self::getUserId($cellphone);
         }
 
         return $username;