From 2c00e4fa6747552630ccedb495b9a4e6c7b5b5fa Mon Sep 17 00:00:00 2001
From: printempw <h@prinzeugen.net>
Date: Wed, 3 Feb 2016 00:11:43 +0800
Subject: [PATCH] add notification if db info is correct but no tables in it

---
 includes/database.class.php | 13 ++++++++++++-
 1 file changed, 12 insertions(+), 1 deletion(-)

diff --git a/includes/database.class.php b/includes/database.class.php
index a3211c47..57f0aea5 100644
--- a/includes/database.class.php
+++ b/includes/database.class.php
@@ -3,7 +3,7 @@
  * @Author: printempw
  * @Date:   2016-02-02 21:59:06
  * @Last Modified by:   prpr
- * @Last Modified time: 2016-02-02 23:48:47
+ * @Last Modified time: 2016-02-03 00:10:17
  */
 
 class database
@@ -20,9 +20,20 @@ class database
             utils::raise(-1, "Can not connect to mysql, check if database info correct in config.php. ".
                                 $conn->connect_error);
         }
+        if (!self::checkTableExist($conn)) {
+            utils::raise(-1, "Looks like that there is no `users` table in your database. ".
+                               "Please run `/admin/install.php` first.");
+        }
         return $conn;
     }
 
+    public static function checkTableExist($conn) {
+        $sql = "SELECT table_name FROM
+                 `INFORMATION_SCHEMA`.`TABLES` WHERE table_name ='users'
+                 AND TABLE_SCHEMA='".DB_NAME."'";
+        return ($conn->query($sql)->num_rows != 0) ? true : false;
+    }
+
     public function query($sql) {
         $result = $this->connection->query($sql);
         if (!$this->connection->error) {