improve user login

plugins/Common.php

@@ -56,7 +56,15 @@ Class Common {
     //判断用户数据目录是否存在
     public static function getUserDataDir($cellphone) {
         $rootDir = __DIR__ . '/../www/' . FSC::$app['config']['content_directory'];
-        $userDir = "{$rootDir}{$cellphone}";
+
+        $username = $cellphone;
+        
+        //账号映射，手机号码转换成4位数字的短账号
+        if (!empty(FSC::$app['config']['tajia_user_map']) && !empty(FSC::$app['config']['tajia_user_map'][$username])) {
+            $username = FSC::$app['config']['tajia_user_map'][$username];
+        }
+
+        $userDir = "{$rootDir}{$username}";
         return is_dir($userDir) ? $userDir : false;
     }