插件

学过typecho插件制作的人都知道，要制作插件必须要搞一个plugin，这个文件将有typecho框架在激活的时候自动加载，所以命名和里面的函数要符合规范。

1、路径规范。
2、函数命名规范。

更多信息请借鉴文章：Typecho二次开发之插件命名规范及注意事项

Plugin.php

<?php
/**
 * Sitemap for Typecho
 * 
 * @package Sitemap
 * @author bayunjiang
 * @version 1.0.0
 * @link https://www.bayun.org
 *
 */
class Sitemap_Plugin implements Typecho_Plugin_Interface
{
    /**
     * 激活插件方法,如果激活失败,直接抛出异常
     * 
     * @access public
     * @return void
     * @throws Typecho_Plugin_Exception
     */
    public static function activate(){
        Helper::addRoute('sitemap', '/sitemap.xml', 'Sitemap_Action', 'action');
    }
    
    /**
     * 禁用插件方法,如果禁用失败,直接抛出异常
     * 
     * @static
     * @access public
     * @return void
     * @throws Typecho_Plugin_Exception
     */
    public static function deactivate(){
        Helper::removeRoute('sitemap');
    }
    
    /**
     * 获取插件配置面板
     * 
     * @access public
     * @param Typecho_Widget_Helper_Form $form 配置面板
     * @return void
     */
    public static function config(Typecho_Widget_Helper_Form $form){}
    
    /**
     * 个人用户的配置面板
     * 
     * @access public
     * @param Typecho_Widget_Helper_Form $form
     * @return void
     */
    public static function personalConfig(Typecho_Widget_Helper_Form $form){}

}

按照typecho插件的语法，设置了触发回调的入口还有别的配置信息。当前sitemap将Sitemap_Action的action设置为激活入口。另外，还设置/sitemap.xml作为入参，这个文件将作为模板进行解释。

Action.php

<?php
class Sitemap_Action extends Typecho_Widget implements Widget_Interface_Do
{
    public function action()
    {
        $db = Typecho_Db::get();
        $options = Typecho_Widget::widget('Widget_Options');

        $pages = $db->fetchAll($db->select()->from('table.contents')
        ->where('table.contents.status = ?', 'publish')
        ->where('table.contents.created < ?', $options->gmtTime)
        ->where('table.contents.type = ?', 'page')
        ->order('table.contents.created', Typecho_Db::SORT_DESC));

        $articles = $db->fetchAll($db->select()->from('table.contents')
        ->where('table.contents.status = ?', 'publish')
        ->where('table.contents.created < ?', $options->gmtTime)
        ->where('table.contents.type = ?', 'post')
        ->order('table.contents.created', Typecho_Db::SORT_DESC));

        header("Content-Type: application/xml");
        echo "<?xml version=\"1.0\" encoding=\"utf-8\"?>\n";
        echo "<?xml-stylesheet type='text/xsl' href='" . $options->pluginUrl . "/Sitemap/sitemap.xsl'?>\n";
        echo "<urlset xmlns:xsi=\"http://www.w3.org/2001/XMLSchema-instance\"\nxsi:schemaLocation=\"http://www.sitemaps.org/schemas/sitemap/0.9 http://www.sitemaps.org/schemas/sitemap/0.9/sitemap.xsd\"\nxmlns=\"http://www.sitemaps.org/schemas/sitemap/0.9\">";
        foreach($pages AS $page) {
            $type = $page['type'];
            $routeExists = (NULL != Typecho_Router::get($type));
            $page['pathinfo'] = $routeExists ? Typecho_Router::url($type, $page) : '#';
            $page['permalink'] = Typecho_Common::url($page['pathinfo'], $options->index);

            echo "\t<url>\n";
            echo "\t\t<loc>".$page['permalink']."</loc>\n";
            echo "\t\t<lastmod>".date('Y-m-d',$page['modified'])."</lastmod>\n";
            echo "\t\t<changefreq>always</changefreq>\n";
            echo "\t\t<priority>0.8</priority>\n";
            echo "\t</url>\n";
        }
        foreach($articles AS $article) {
            $type = $article['type'];
            $article['categories'] = $db->fetchAll($db->select()->from('table.metas')
                    ->join('table.relationships', 'table.relationships.mid = table.metas.mid')
                    ->where('table.relationships.cid = ?', $article['cid'])
                    ->where('table.metas.type = ?', 'category')
                    ->order('table.metas.order', Typecho_Db::SORT_ASC));
            $article['category'] = urlencode(current(Typecho_Common::arrayFlatten($article['categories'], 'slug')));
            $article['slug'] = urlencode($article['slug']);
            $article['date'] = new Typecho_Date($article['created']);
            $article['year'] = $article['date']->year;
            $article['month'] = $article['date']->month;
            $article['day'] = $article['date']->day;
            $routeExists = (NULL != Typecho_Router::get($type));
            $article['pathinfo'] = $routeExists ? Typecho_Router::url($type, $article) : '#';
            $article['permalink'] = Typecho_Common::url($article['pathinfo'], $options->index);

            echo "\t<url>\n";
            echo "\t\t<loc>".$article['permalink']."</loc>\n";
            echo "\t\t<lastmod>".date('Y-m-d',$article['modified'])."</lastmod>\n";
            echo "\t\t<changefreq>always</changefreq>\n";
            echo "\t\t<priority>0.5</priority>\n";
            echo "\t</url>\n";
        }
        echo "</urlset>";
    }
}

遍历table.contents的内容，然后将链接和信息生成输出到浏览器或者控制台。至此，一个sitemap制作成功！