优化查询代码；增加RSS1

app/common/tools/Site.php

@@ -0,0 +1,45 @@
+<?php
+namespace app\common\tools;
+
+use think\facade\Request;
+
+class Site
+{
+    public static function mapAllPost()
+    {
+        $list_post = \app\model\Post::cache(60)->where('status', 1)->select();
+
+        return $list_post;
+    }
+    public static function mapRecentlyPost()
+    {
+        $list_post = \app\model\Post::cache(60)->where('status', 1)->order('publish_time', "desc")->limit(25)->select();
+
+        return $list_post;
+    }
+
+    public static function name()
+    {
+        return get_system_config('site_name');
+    }
+
+    public static function indexUrl()
+    {
+        return Request::scheme() . '://' . get_system_config('main_domain', Request::host());
+    }
+
+    public static function desc()
+    {
+        return get_system_config('site_desc');
+    }
+
+    public static function logo()
+    {
+        return get_source_link(get_system_config('site_logo'));
+    }
+
+    public static function keywords()
+    {
+        return get_system_config('site_keywords');
+    }
+}