duoshuo/WordPress.php

<?php
class Duoshuo_WordPress extends Duoshuo_Abstract{
	
	const VERSION = '1.2';
	
	protected static $_instance = null;
	
	/**
	 * 
	 * @var string
	 */
	public $pluginDirUrl;
	
	/**
	 * 
	 * @var array
	 */
	protected $errorMessages = array();
	
	protected $EMBED = false;
	
	public $shortName;
	
	public $secret;
	
	protected $_scriptsPrinted = false;
	
	protected static $_defaultOptions = array(
		'duoshuo_debug'					=>	0,
		'duoshuo_api_hostname'			=>	'api.duoshuo.com',
		'duoshuo_cron_sync_enabled'		=>	1,
		'duoshuo_seo_enabled'			=>	1,
		'duoshuo_postpone_print_scripts'=>	0,
		'duoshuo_cc_fix'				=>	1,
		'duoshuo_sync_pingback_and_trackback'=>	0,
		'duoshuo_social_login_enabled'	=>	1,
		'duoshuo_comments_wrapper_intro'=>	'',
		'duoshuo_comments_wrapper_outro'=>	'',
		'duoshuo_last_log_id'			=>	0,
		'duoshuo_theme'					=>	'default',
		'duoshuo_style_patch'			=>	1,
	);
	
	protected function __construct(){
		$this->shortName = $this->getOption('short_name');
		$this->secret = $this->getOption('secret');
		
		foreach (self::$_defaultOptions as $optionName => $value)
			if (get_option($optionName) === false)
				update_option($optionName, $value);
		
		$this->pluginDirUrl = plugin_dir_url(__FILE__);
	}
	
	/**
	 * 
	 * @return Duoshuo_WordPress
	 */
	public static function getInstance(){
		if (self::$_instance === null)
			self::$_instance = new self();
		return self::$_instance;
	}
	
	public function timezone(){
		return get_option('gmt_offset');
	}
	
	public function getOption($key){
		return get_option('duoshuo_' . $key);
	}
	
	public function updateOption($key, $value){
		return update_option('duoshuo_' . $key, $value);
	}
	
	public function deleteOption($key){
		return delete_option('duoshuo_' . $key);
	}
	
	public function updateUserMeta($userId, $metaKey, $metaValue){
		return function_exists('update_user_meta')
			? update_user_meta($userId, $metaKey, $metaValue)
			: update_usermeta($userId, $metaKey, $metaValue);
	}
	
	public function getUserMeta($userId, $metaKey, $single = false){
		//get_user_meta 从3.0开始有效: get_usermeta($user->ID, $blog_prefix.'capabilities', true);
		return function_exists('get_user_meta')
			? get_user_meta($userId, $metaKey, true)
			: get_usermeta($userId, $metaKey);
	}
	
	public function updateThreadMeta($threadId, $metaKey, $metaValue){
		return update_post_meta($threadId, $metaKey, $metaValue);
	}
	
	public function threadKey($post){
		return $post->post_status == 'inherit'
			? ($post->post_parent ? $post->post_parent : null)
			: $post->ID;
	}
	
	public function topPost($post){
		return $post->post_status == 'inherit'
			? ($post->post_parent ? get_post($post->post_parent) : null)
			: $post;
	}
	
	public function get_blog_prefix(){
		global $wpdb;
		return method_exists($wpdb,'get_blog_prefix')
			? $wpdb->get_blog_prefix()
			: $wpdb->prefix;
	}
	
	public function connected(){
		$connected_failed = get_option('duoshuo_connect_failed');
		return $connected_failed
			? (time() - $connected_failed > 1800)
			: true;
	}
	
	public function connectFailed(){
		update_option('duoshuo_connect_failed', time());
	}
	
	public function normalizeUrl($url){
		if (strpos($url, '/') === 0){
			$siteurl = get_option('siteurl');
			
			if (strlen($siteurl) >=8 && (false !== $pos = strpos($siteurl, '/', 8)))
				$siteurl = substr($siteurl, 0, $pos);
			
			return $siteurl . $url;
		}
		else{
			return $url;
		}
	}
	
	public function allowedHtml($tags, $context = ''){
		if (!isset($tags['img']))
			$tags['img'] = array();
	
		$tags['img']['src'] = true;
		return $tags;
	}
	
	public function setJwtCookie($logged_in_cookie, $expire, $expiration, $user_id, $scheme){
		$jwt = $this->jwt($user_id);
		$secure = $scheme == 'secure_auth';
		$secure_logged_in_cookie = apply_filters('secure_logged_in_cookie', false, $user_id, $secure);
		
		// $httponly = false
		//setcookie('duoshuo_token', $jwt, $expire, PLUGINS_COOKIE_PATH, COOKIE_DOMAIN, $secure, true);
		setcookie('duoshuo_token', $jwt, $expire, ADMIN_COOKIE_PATH, COOKIE_DOMAIN, $secure);
		setcookie('duoshuo_token', $jwt, $expire, COOKIEPATH, COOKIE_DOMAIN, $secure_logged_in_cookie);
		if ( COOKIEPATH != SITECOOKIEPATH )
			setcookie('duoshuo_token', $jwt, $expire, SITECOOKIEPATH, COOKIE_DOMAIN, $secure_logged_in_cookie);
		
		$this->syncUserToRemote($user_id);
	}
	
	public function clearJwtCookie(){
		// 3.5版本之前没有定义 YEAR_IN_SECONDS
		//setcookie( 'duoshuo_token',    ' ', time() - 31536000, PLUGINS_COOKIE_PATH, COOKIE_DOMAIN );
		setcookie( 'duoshuo_token',    ' ', time() - 31536000, ADMIN_COOKIE_PATH,   COOKIE_DOMAIN );
		setcookie( 'duoshuo_token',    ' ', time() - 31536000, COOKIEPATH,          COOKIE_DOMAIN );
		
		if ( COOKIEPATH != SITECOOKIEPATH )
			setcookie( 'duoshuo_token',    ' ', time() - 31536000, SITECOOKIEPATH,      COOKIE_DOMAIN );
	}
	
	public function oauthConnect(){
		if (!$this->connected())
			return ;
	
		if (!isset($_GET['code']))
			return false;
	
		try{
			$keys = array(
					'code'	=> $_GET['code'],
					'redirect_uri' => (is_ssl()?'https':'http').'://duoshuo.com/login-callback/',
			);
			
			$token = $this->getClient()->getAccessToken('code', $keys);
			
			if ($token['code'] != 0)
				return false;
			
			$this->userLogin($token);
		}
		catch(Duoshuo_Exception $e){
			$this->connectFailed();
		}
	}
	
	public function userLogin($token){
		global $wpdb, $error;
		
		nocache_headers();
		if (isset($token['user_key'])){//登陆成功
			$user = get_user_by('id', $token['user_key']);
			
			$this->updateUserMeta($user->ID, 'duoshuo_access_token', $token['access_token']);
			
			wp_clear_auth_cookie();
			wp_set_auth_cookie($user->ID, true, is_ssl());
			wp_set_current_user($user->ID);
			
			if (isset($_GET['redirect_to'])){
				// wordpress 采用的是redirect_to字段
				wp_redirect($_GET['redirect_to']);
				exit;
			}
		}
		else{
			if (isset($_GET['redirect_to']) && $_GET['redirect_to'] !== admin_url()){//	如果是在内容页登录，无论如何都把用户带回内容页
				wp_redirect($_GET['redirect_to']);
				exit;
			}
			else{
				$client = new Duoshuo_Client($this->shortName, $this->secret, null, $token['access_token']);
				$response = $client->request('GET', 'users/profile', array('user_id'=> $token['user_id']));
				
				if (get_option('users_can_register')){//	如果站点开启注册
					// 要求用户输入帐号进行绑定
					$query = array(
							'action'			=>	'register',
							//'duoshuo_user_id'	=>	$token['user_id'],
							'duoshuo_access_token'=>$token['access_token'],
					);
					
					$this->duoshuoUserId = $token['user_id'];
					
					$registerUrl = site_url( 'wp-login.php?' . http_build_query($query), 'login' );
					$error = '<img src="' . $response['response']['avatar_url'] . '" width="50" height="50" style="float:left;margin: 0 0.5em 0 0;" />'
						. '<strong>' . esc_html($response['response']['name']) . '</strong>，欢迎！<br />'
						. '请绑定已注册的本站帐号；<br />'
						. '如果你还没有本站帐号，请<a href="' . esc_url($registerUrl) . '">注册</a>';
				}
				else{//	如果站点未开启注册
					//如果是从wp-login页面发起的请求，就不触发重定向
					$error = '<img src="' . $response['response']['avatar_url'] . '" width="50" height="50" style="float:left;margin: 0 0.5em 0 0;" />'
						. '<strong>' . esc_html($response['response']['name']) . '</strong>，欢迎！<br />'
						. '你还没有和本站的用户帐号绑定，<br />'
						. '如果你已经注册，请先登录之后绑定社交帐号';
				}
			}
		}
	}
	
	public function bindUser($user_login, $user = null){
		//	早期版本wp_login接口只有第一个参数
		if (empty($user)){
			$user = get_user_by('login', $user_login);
		}
		
		if (isset($_POST['duoshuo_user_id'])){
			$query = array(
				'master_user_id'=>	$_POST['duoshuo_user_id'],
				'jwt'			=>	$this->jwt($user->ID),
				'redirect_uri'	=>	admin_url(),
			);
			
			wp_redirect((is_ssl()?'https':'http').'://duoshuo.com/merge/?'. http_build_query($query, null, '&'));
			exit;
		}
	}
	
	public function userRegisterHook($userId){
		if (!$this->connected())
			return ;
		
		//	WP_User
		$user = get_user_by('id', $userId);
		try{
			if (isset($_POST['user_login']) && isset($_POST['duoshuo_access_token'])){
				//	已登录多说帐号，且多说帐号并未与本站user_key绑定
				$client = new Duoshuo_Client($this->shortName, $this->secret, null, $_POST['duoshuo_access_token']);
				
				$params = array(
					'user' => $this->packageUser($user),
				);
				$remoteResponse = $client->request('POST', 'sites/join', $params);
				//	不再需要记录duoshuo_user_id
			}
			else{
				//	未登录多说帐号
				$this->exportUsers(array($user));
			}
		}
		catch(Duoshuo_Exception $e){
			$this->connectFailed();
		}
	}
	
	public function originalCommentsNotice(){
		echo '<div class="updated">'
			. '<p>多说正在努力地为您的网站提供强大的社会化评论服务，WordPress原生评论数据现在仅用于备份；</p>'
			. '<p>多说会将每一条评论实时写回本地数据库，您在多说删除/审核了评论，也同样会同步到本地数据；</p>'
			. '<p>您在本页做的任何管理评论操作，都不会对多说评论框上的评论起作用，请访问<a href="http://' . $this->shortName . '.' . self::DOMAIN . '/admin/" target="_blank">评论管理后台</a>进行评论管理。</p>'
			. '</div>';
	}
	
	/**
	 * 
	 * @return Duoshuo_Client
	 */
	public function getClient($userId = 0){	//如果不输入参数，就是游客
		if ($userId !== null){
			$accessToken = $this->getUserMeta($userId, 'duoshuo_access_token');
			
			if (is_string($accessToken))
				$client = new Duoshuo_Client($this->shortName, $this->secret, $this->jwt($userId), $accessToken);
		}
		if (!isset($client))
			$client = new Duoshuo_Client($this->shortName, $this->secret, $this->jwt($userId));
		
		$apiHostname = $this->getOption('api_hostname');
		if ($apiHostname)
			$client->end_point = 'http://' . $apiHostname . '/';
		
		return $client;
	}
	
	public function config(){
		/*if ($_SERVER['REQUEST_METHOD'] == 'POST' && !($this->shortName && $this->secret)){
			self::registerSite();
		}*/
		include dirname(__FILE__) . '/config.php';
	}
	
	public function sync(){
		include dirname(__FILE__) . '/sync.php';
	}
	
	public function manage(){
		include dirname(__FILE__) . '/manage.php';
	}
	
	public function themes(){
		include dirname(__FILE__) . '/themes.php';
	}
	
	public function preferences(){
		include dirname(__FILE__) . '/preferences.php';
	}
	
	public function checkDependency($name){
		global $wp_version;
		
		switch ($name){
			case 'php':
				return array(PHP_VERSION, version_compare(PHP_VERSION, '5.3.0', '<') ? '建议升级php到5.3或以上' : true);
			case 'wordpress':
				return array($wp_version, version_compare($wp_version, '3.3.0', '<') ? '建议升级WordPress到3.3或以上' : true);
			case 'json':
				if (!extension_loaded('json'))
					return array('缺少json扩展', '安装并启用JSON扩展');
				return array(true, true);
			case 'curl':
				if (!extension_loaded('curl'))
					return array('缺少curl扩展', '安装并启用curl扩展');
				if (!function_exists('curl_init'))
					return array('curl_init()被禁用', '启用curl_init()函数');
				if (!function_exists('curl_exec'))
					return array('curl_exec()被禁用', '启用curl_exec()函数');
				return array(true, true);
			case 'fopen':
				if (!function_exists('fopen'))
					return array('fopen()被禁用', '启用fopen()函数');
				if (!function_exists('ini_get'))
					return array('ini_get()被禁用', '启用ini_get()函数');
				if (!ini_get('allow_url_fopen'))
					return array('allow_url_fopen被关闭', '在php.ini中设置allow_url_fopen = On');
				return array(true, true);
			case 'fsockopen':
				if (!function_exists('fsockopen'))
					return array('fsockopen()被禁用', '启用fsockopen()函数');
				return array(true, true);
			case 'hash_hmac':
				if (!function_exists('hash_hmac'))
					return array('hash_hmac()不存在', '升级php到5.3或以上');
				return array(true, true);
			default:
				return array(true, true);
		}
	}
	
	public function settings(){
		include dirname(__FILE__) . '/settings.php';
	}
	
	public function statistics(){
		include dirname(__FILE__) . '/statistics.php';
	}

	public function profile(){
		include dirname(__FILE__) . '/profile.php';
	}
	
	public function reset(){
        global $wpdb;
		//delete_option('duoshuo_short_name');
		
		// 删除状态有关的值
		delete_option('duoshuo_secret');
		delete_option('duoshuo_synchronized');
		delete_option('duoshuo_connect_failed');
		delete_option('duoshuo_notice');
		delete_option('duoshuo_sync_lock');
		
		// 删除所有选项
		foreach (self::$_defaultOptions as $optionName => $value)
			delete_option($optionName);
		
		// WP 2.9 以后支持这个函数
		if (function_exists('delete_metadata')){
			delete_metadata('user', 0, 'duoshuo_access_token', '', true);
			delete_metadata('user', 0, 'duoshuo_user_id', '', true);
			delete_metadata('post', 0, 'duoshuo_thread_id', '', true);
			delete_metadata('comment', 0, 'duoshuo_parent_id', '', true);
			delete_metadata('comment', 0, 'duoshuo_post_id', '', true);
		}

        //清空comment_agent字段
        $wpdb->get_results($wpdb->prepare("update wp_comments set comment_agent='' where comment_agent LIKE '%%Duoshuo/%%'"));

		$redirect_url = add_query_arg('message', 'reset', admin_url('admin.php?page=duoshuo'));
		wp_redirect($redirect_url);
		exit;
	}
	
	/**
	 * 关闭默认的评论，避免spammer
	 */
	public function commentsOpen($open, $post_id = null) {
	    //if ($this->EMBED || get_post_meta($post_id, 'duoshuo_thread_id', true))
	    //	return false;
		$script_name = array_pop( explode( '/', $_SERVER['PHP_SELF'] ) );
	    if (preg_match('/wp\-comments\-post\.php$/', $script_name) && get_post_meta($post_id, 'duoshuo_status', true) !== 'disabled')
	    	return false;
	    
	    return $open;
	}
	
	public function commentsTemplate($value){
		global $wpdb, $post, $comments;
		
	    $topPost = $this->topPost($post);
	    
	    if ($topPost === null)	//	 可能是inherit 但post_parent=0
	    	return $value;
	    
	    if ( !( is_singular() && ( have_comments() || 'open' == $topPost->comment_status ) ) ) {
	        return $value;
	    }
	    
	    if (get_post_meta($topPost->ID, 'duoshuo_status', true) == 'disabled')
	    	return $value;
	    
		/*
	    if ( !dsq_is_installed() || !dsq_can_replace() ) {
	        return $value;
	    }*/
	    
	    $threadId = get_post_meta($topPost->ID, 'duoshuo_thread_id', true);
	    
	    if (empty($threadId) && $this->connected()){
	    	$this->syncUserToRemote($topPost->post_author);
	    	$this->syncPostToRemote($topPost->ID, $topPost);
		    try{
		    	$comments = $wpdb->get_results($wpdb->prepare("SELECT * FROM $wpdb->comments where comment_post_ID = %d AND comment_agent NOT LIKE '%%Duoshuo/%%' order by comment_ID asc", $topPost->ID));
		    	$this->exportComments($comments);
		    }
		    catch(Duoshuo_Exception $e){
		    	$this->connectFailed();
			}
	    }
	    
		$this->EMBED = true;
		return dirname(__FILE__) . '/comments.php';
	    //	return $value;
	}
	
	public function commentsPopupLinkAttributes($attribs){
		global $post;
		
		$threadKey = $this->threadKey($post);
		if ($threadKey === null)	//	post_status = inherit, post_parent = 0
			return $attribs;
		
		if (has_filter('comments_number', array($this, 'commentsText')))
			remove_filter('comments_number', array($this, 'commentsText'));
		
		$attribs .= ' class="ds-thread-count" data-thread-key="' . $threadKey .'"';
		return $attribs;
	}
	
	public function commentsText($comment_text, $number = null){
	    global $post;
	    
	    $threadKey = $this->threadKey($post);
	    if ($threadKey === null)	//	post_status = inherit, post_parent = 0
	    	return $comment_text;
	    
	    $attribs = 'class="ds-thread-count" data-thread-key="' . $threadKey .'"';
	    if (preg_match('/^<([a-z]+)( .*)?>(.*)<\/([a-z]+)>$/i', $comment_text, $matches) && $matches[1] == $matches[4])
	    	return "<$matches[1] $attribs$matches[2]>$matches[3]</$matches[4]>";
	    else
		    return "<span $attribs data-replace=\"1\">$comment_text</span>";
	}
	
	public function jwt($userId = null){
		if ($userId === null)
			$user = wp_get_current_user();
		elseif($userId != 0)
			$user = get_user_by( 'id', $userId);
		
		if (empty($user) || !$user->ID)
			return null;
		
		$token = array(
			'short_name'=>	$this->shortName,
			'user_key'	=>	$user->ID,
			'name'		=>	$user->display_name,
		);
		
		return self::encodeJWT($token, $this->secret);
	}
	
	/**
	 * @deprecated
	 * @param string|int $userId
	 * @return mixed
	 */
	public function userData($userId = null){	// null 代表当前登录用户，0代表游客
		if ($userId === null)
			$current_user = wp_get_current_user();
		elseif($userId != 0)
			$current_user = get_user_by( 'id', $userId);
		
	    if (isset($current_user) && $current_user->ID) {
	        $avatar_tag = get_avatar($current_user->ID);
	        $avatar_data = array();
	        preg_match('/(src)=((\'|")[^(\'|")]*(\'|"))/i', $avatar_tag, $avatar_data);
	        $avatar = htmlspecialchars_decode(str_replace(array('"', "'"), '', $avatar_data[2]), ENT_QUOTES);
	        
	        return array(
	            'id' => $current_user->ID,
	            'name' => $current_user->display_name,
	            'avatar' => $avatar,
	            'email' => $current_user->user_email,
	        );
	    }
	    else{
	    	return array();
	    }
	}
	
	public function buildQuery($options = array()){
		$query = array(
			'short_name'	=>	$this->shortName,
			'sso'	=>	array(
				'login'=>	site_url('wp-login.php', 'login') .'?action=duoshuo_login',
				'logout'=>	htmlspecialchars_decode(wp_logout_url(), ENT_QUOTES),
			),
		);
		
		if ($theme = $this->getOption('theme'))
			$query['theme'] = $theme;
		
		if ($this->getOption('style_patch'))
			$query['stylePatch'] = 'wordpress/' . str_replace(' ', '_', function_exists('wp_get_theme') ? wp_get_theme()->get('Name') : get_current_theme());
		
		if (!empty($options))
			$query['options'] = $options;
		
		return $query;
	}
	
	public function appendScripts(){
		if ($this->_scriptsPrinted)
			return;
		$this->_scriptsPrinted = true;
?>
<script type="text/javascript">
var duoshuoQuery = <?php echo json_encode($this->buildQuery());?>;
duoshuoQuery.sso.login += '&redirect_to=' + encodeURIComponent(window.location.href);
duoshuoQuery.sso.logout += '&redirect_to=' + encodeURIComponent(window.location.href);
</script>
<!-- Custon duoshuo embed script-->
<script type="text/javascript" src="//www.solomp.com/wp-content/plugins/duoshuo/embed-formatted-v1.2.js" charset="UTF-8" async="async"></script>
<?php if( is_ssl() ){ ?>
    
<?php } else { ?>
    
<?php }
	}

	/**
	 * 在wp_print_scripts 没有执行的时候执行最传统的代码
	 */
	public function printScripts(){
		if ($this->_scriptsPrinted)
			return;
		$this->_scriptsPrinted = true;
		?>
<script type="text/javascript">
var duoshuoQuery = <?php echo json_encode($this->buildQuery());?>;
duoshuoQuery.sso.login += '&redirect_to=' + encodeURIComponent(window.location.href);
duoshuoQuery.sso.logout += '&redirect_to=' + encodeURIComponent(window.location.href);
(function() {
    var ds = document.createElement('script');
    ds.type = 'text/javascript';
    ds.async = true;
    ds.charset = 'UTF-8';
    ds.src = (document.location.protocol == 'https:' ? 'https:' : 'http:') + '//www.solomp.com/wp-content/plugins/duoshuo/embed-formatted-v1.2.js';
    (document.getElementsByTagName('head')[0] || document.getElementsByTagName('body')[0]).appendChild(ds);
})();
</script><?php
	}
	
	public function loginForm(){
		if (isset($_REQUEST['action']) && $_REQUEST['action'] === 'duoshuo_login' && isset($this->duoshuoUserId)){ // 登录后发现没有本站帐号，输入帐号进行绑定 ?>
			<input type="hidden" name="duoshuo_user_id" value="<?php echo $this->duoshuoUserId;?>" />
<?php 
		}
		elseif (isset($_REQUEST['duoshuo_access_token'])){ ?>
			<label><input type="checkbox" name="duoshuo_access_token" value="<?php echo $_REQUEST['duoshuo_access_token'];?>" checked="checked" /> 注册后和多说帐号绑定</label>
<?php 
		}
		else{
			$redirectUri = add_query_arg(array('action'=>'duoshuo_login', 'redirect_to'=>urlencode(admin_url())), site_url('wp-login.php', 'login'));?>
<div class="ds-login" style="height:40px;"></div>
<?php $this->printScripts();?>
<script>
if (window.duoshuoQuery && duoshuoQuery.sso)
	duoshuoQuery.sso.login = <?php echo json_encode($redirectUri);?>;
</script>
<?php
		}
	}

	public function connectSite(){
		update_option('duoshuo_short_name', $_GET['short_name']);
		update_option('duoshuo_secret', $_GET['secret']);
		$this->shortName = $_GET['short_name'];
		$this->secret = $_GET['secret'];
		?>
<script>
window.parent.location = <?php echo json_encode(admin_url('admin.php?page=duoshuo'));?>;
</script>
<?php 
		exit;
	}
	
	public function export(){
		global $wpdb;
		
		@set_time_limit(0);
		@ini_set('memory_limit', '256M');
		@ini_set('display_errors', $this->getOption('debug'));
		
		$progress = $this->getOption('synchronized');
		
		if (!$progress || is_numeric($progress))//	之前已经完成了导出流程
			$progress = 'user/0';
		
		list($type, $offset) = explode('/', $progress);
		
		try{
			switch($type){
				case 'user':
					$limit = 30;
					// 不包括user_login, user_pass
					$columns = array('ID', 'user_nicename', 'user_email', 'user_url', 'user_registered', 'display_name');
					$users = $wpdb->get_results( $wpdb->prepare("SELECT " . implode(',', $columns) . "  FROM $wpdb->users order by ID asc limit %d,%d", $offset, $limit));
					$count = $this->exportUsers($users);
					break;
				case 'post':
					$limit = 10;
					$columns = array('ID', 'post_author', 'post_date', 'post_date_gmt', 'post_content', 'post_title', 'post_excerpt', 'post_status', 'comment_status', 'ping_status', 'post_name', 'post_modified_gmt', 'guid', 'post_type', 'post_parent');
					$posts = $wpdb->get_results( $wpdb->prepare("SELECT " . implode(',', $columns) . "  FROM $wpdb->posts where post_type not in ('attachment', 'nav_menu_item', 'revision') and post_status not in ('auto-draft', 'draft', 'trash', 'inherit') order by ID asc limit %d,%d", $offset, $limit) );// 'inherit' 不再进行同步
					$count = $this->exportPosts($posts);
					break;
				case 'comment':
					$limit = 50;
					$comments = $wpdb->get_results( $wpdb->prepare("SELECT * FROM $wpdb->comments where comment_agent NOT LIKE '%%Duoshuo/%%' order by comment_ID asc limit %d,%d", $offset, $limit));
					$count = $this->exportComments($comments);
					break;
				default:
			}
			
			if ($count == $limit){
				$progress = $type . '/' . ($offset + $limit);
			}
			elseif($type == 'user')
				$progress = 'post/0';
			elseif($type == 'post')
				$progress = 'comment/0';
			elseif($type == 'comment')
				$progress = time();
			
			update_option('duoshuo_synchronized', $progress);
	        $response = array(
				'progress'=>$progress,
	        	'code'	=>	0
			);
			$this->sendJsonResponse($response);
		}
		catch(Duoshuo_Exception $e){
			$this->sendException($e);
		}
	}
	
	public function packageOptions(){
		global $wp_version;
		
		$options = array(
			'url'			=>	get_option('home'),
			'siteurl'		=>	get_option('siteurl'),
			'admin_email'	=>	get_option('admin_email'),
			'timezone'		=>	get_option('timezone_string'),
			'use_smilies'	=>	get_option('use_smilies'),
			'name'			=>	html_entity_decode(get_option('blogname'), ENT_QUOTES, 'UTF-8'),
			'description'	=>	html_entity_decode(get_option('blogdescription'), ENT_QUOTES, 'UTF-8'),
			'system_theme'	=>	function_exists('wp_get_theme') ? wp_get_theme()->get('Name') : get_current_theme(),//'current_theme'=>'system_theme',
			'system_version'=>	$wp_version,
			'plugin_version'=>	self::VERSION,
			'local_api_url'	=>	$this->pluginDirUrl . 'api.php',
			'oauth_proxy_url'=>	$this->pluginDirUrl . 'oauth-proxy.php',
		);
		
		$akismet_api_key = get_option('wordpress_api_key');
		if ($akismet_api_key)
			$options['akismet_api_key'] = $akismet_api_key;
		
		return $options;
	}
	
	/**
	 * 通知多说服务器更新站点信息
	 */
	public function updateSite(){
		if (!$this->connected())
			return;
		
		$params = $this->packageOptions();
		$user = wp_get_current_user();
		
		try{
			$response = $this->getClient($user->ID)->request('POST', 'sites/settings', $params);
			
			if (is_string($response)){
				$this->errorMessages[] = $response;
			}
			elseif(isset($response['code']) && $response['code'] != 0){
				$this->errorMessages[] = $response['errorMessage'];
			}
		}
		catch(Duoshuo_Exception $e){
			$this->connectFailed();
		}
	}
	/*
	public function updatedOption($option, $oldvalue = null, $newvalue = null){
		$options = array('blogname', 'blogdescription', 'home', 'siteurl', 'admin_email', 'timezone_string', 'use_smilies', 'system_theme', 'akismet_api_key');
		
		if (in_array($option, $options))
			$this->needToUpdateSite = true;
	}*/
	
	public function syncUserToRemote($userId){
		if (!$this->connected())
			return ;
		
		//	WP_User
		$userData = get_user_by('id', $userId);
		
		try{
			$this->exportUsers(array($userData));
		}
		catch(Duoshuo_Exception $e){
			$this->connectFailed();
		}
	}
	
	/**
	 * 同步这篇文章到所有社交网站
	 * @param string $postId
	 */
	public function syncPostToRemote($postId, $post = null){
		if (!$this->connected())
			return;
		
		if ($post == null)
			$post = get_post($postId);
		
		if (in_array($post->post_type, array('nav_menu_item', 'revision', 'attachment'))
			|| in_array($post->post_status, array('inherit', 'auto-draft', 'draft', 'trash')))	//'inherit' 不再进行同步
			return ;
		
		$params = $this->packageThread($post);
		
		if (isset($_POST['sync_to'])){
			if ($_POST['sync_to'][0] == 'placeholder')
				unset($_POST['sync_to'][0]);
			$params['sync_to'] = implode(',', $_POST['sync_to']);
		}
		
		try{
			$response = $this->getClient($post->post_author)->request('POST', 'threads/sync', $params);
			
			unset($_POST['sync_to']); //避免某些插件多次触发save_post
			
			if (is_array($response) && isset($response['code']) && $response['code'] == 0 && isset($response['response']))
				update_post_meta($post->ID, 'duoshuo_thread_id', $response['response']['thread_id']);
		}
		catch(Duoshuo_Exception $e){
			$this->connectFailed();
		}
	}
	
	public function packageUser($user){
		static $roleMap = array(
				'administrator'	=>	'administrator',
				'editor'		=>	'editor',
				'author'		=>	'author',
				'contributor'	=>	'user',
				'subscriber'	=>	'user',
		);
		
		if ($user instanceof WP_User){	//	wordpress 3.3
			$userData = $user->data;
			unset($userData->user_pass);
			unset($userData->user_login);
			$capabilities = $user->caps;
		}
		else{
			$userData = $user;
			unset($userData->user_pass);
			unset($userData->user_login);
			$capabilities = $this->getUserMeta($user->ID, $this->get_blog_prefix().'capabilities', true);
		}
		
		$data = array(
				'user_key'	=>	$userData->ID,
				'name'		=>	$userData->display_name,
				'email'		=>	$userData->user_email,
				'url'		=>	$userData->user_url,
				'created_at'=>	$userData->user_registered,
				'meta'		=>	json_encode($userData),
		);
		
		$avatar_data = array();
		if (preg_match('/(src)=((\'|")[^(\'|")]*(\'|"))/i', get_avatar($userData->ID), $avatar_data))
			$data['avatar_url'] = htmlspecialchars_decode(str_replace(array('"', "'"), '', $avatar_data[2]), ENT_QUOTES);
		
		foreach($roleMap as $wpRole => $role)
			if (isset($capabilities[$wpRole]) && $capabilities[$wpRole]){
			$data['role'] = $role;
			break;
		}
	
		return $data;
	}
	
	public function packageThread($post){
		$post->custom = get_post_custom($post->ID);
		$meta = clone ($post);
		unset($meta->post_title);
		unset($meta->post_content);
		unset($meta->post_excerpt);
		unset($meta->post_date_gmt);
		unset($meta->post_modified_gmt);
		unset($meta->post_name);
		unset($meta->post_status);
		unset($meta->comment_status);
		unset($meta->ping_status);
		unset($meta->guid);
		unset($meta->post_type);
		unset($meta->post_author);
		unset($meta->ID);
		
		$params = array(
			'thread_key'=>	$post->ID,
			'author_key'=>	$post->post_author,
			'title'		=>	html_entity_decode($post->post_title, ENT_QUOTES, 'UTF-8'),
			'content'	=>	$post->post_content,
			'excerpt'	=>	$post->post_excerpt,
			'created_at'=>	mysql2date('Y-m-d\TH:i:s+00:00', $post->post_date_gmt),
			'updated_at'=>	mysql2date('Y-m-d\TH:i:s+00:00', $post->post_modified_gmt),
			'ip'		=>	$_SERVER['REMOTE_ADDR'],
			'url'		=>	get_permalink($post),
			'slug'		=>	$post->post_name,
			'status'	=>	$post->post_status,
			'comment_status'=>	$post->comment_status,
			'ping_status'=>	$post->ping_status,
			'guid'		=>	$post->guid,
			'type'		=>	$post->post_type,
			'meta'		=>	json_encode($meta),
			'source'	=>	'wordpress',
		);
		
		if (!class_exists('nggLoader', false) || class_exists('nggRewrite', false))
			$params['filtered_content'] = str_replace(']]>', ']]&gt;', apply_filters('the_content', $post->post_content));
		
		if (function_exists('get_post_thumbnail_id')){	//	WordPress 2.9开始支持
			$post_thumbnail_id = get_post_thumbnail_id( $post->ID );
			if ( $post_thumbnail_id ) {
				$params['thumbnail'] = $this->normalizeUrl(wp_get_attachment_url($post_thumbnail_id));
				//$image = wp_get_attachment_image_src( $post_thumbnail_id, $size, false);
				//list($src, $width, $height) = $image;
				//$meta = wp_get_attachment_metadata($id);
				//'large-feature'
				//'post-thumbnail'
			}
		}
		
		$args = array(
			'post_parent' => $post->ID,
			'post_status' => 'inherit',
			'post_type'	=> 'attachment',
			'post_mime_type' => 'image',
			'order' => 'ASC',
			'orderby' => 'menu_order ID'
		);
		$images = array();
		$children = get_children($args);
		if (is_array($children))
			foreach($children as $attachment)
				$images[] = $this->normalizeUrl(wp_get_attachment_url($attachment->ID));
		if (!empty($images))
			$params['images'] = json_encode($images);
		
		/*
		$authorId = $this->getUserMeta($post->post_author, 'duoshuo_user_id', true);
		if (!empty($authorId))
			$params['author_id'] = $authorId;
		
		$threadId = get_post_meta($post->ID, 'duoshuo_thread_id', true);
		if (!empty($threadId))
			$params['thread_id'] = $threadId;*/
		return $params;
	}
	
	public function packageComment($comment){
		static $statusMap = array(
			'0'		=>	'pending',
			'1'		=>	'approved',
			'trash'	=>	'deleted',
			'spam'	=>	'spam',
			'post-trashed'=>'thread-deleted',
		);
		$meta = clone ($comment);
		unset($meta->comment_ID);
		unset($meta->comment_post_ID);
		unset($meta->comment_author);
		unset($meta->comment_author_email);
		unset($meta->comment_author_url);
		unset($meta->comment_author_IP);
		unset($meta->comment_date_gmt);
		unset($meta->comment_content);
		unset($meta->comment_karma);
		unset($meta->comment_approved);
		unset($meta->comment_agent);
		unset($meta->comment_type);
		unset($meta->comment_parent);
		unset($meta->user_id);

		$data = array(
			'thread_key'	=>	$comment->comment_post_ID,
			'post_key'		=>	$comment->comment_ID,
			'author_key'	=>	$comment->user_id,
			'author_name'	=>	htmlspecialchars_decode($comment->comment_author, ENT_QUOTES),
			'author_email'	=>	$comment->comment_author_email,
			'author_url'	=>	$comment->comment_author_url,
			'created_at'	=>	str_replace(' ', 'T', $comment->comment_date_gmt) . '+00:00',
			'message'		=>	$comment->comment_content,
			'agent'			=>	$comment->comment_agent,
			'type'			=>	$comment->comment_type,
			'ip'			=>	$comment->comment_author_IP,
			'status'		=>	$statusMap[$comment->comment_approved],
			'parent_key'	=>	$comment->comment_parent,	// TODO 接收的地方要处理一下
			'meta'			=>	json_encode($meta),			//	comment_date, comment_karma
		);
		//'source'		=>	'import',
		
		return $data;
	}
	
	public function exportOneComment($comment_ID){
		$comment = get_comment($comment_ID);
		
		return $this->exportComments(array($comment));
	}
	
	/**
	 * 从服务器pull评论到本地
	 * 
	 * @param array $posts
	 */
	public function createPost($post){
		global $wpdb;
		
		//	将img加到白名单中，仅对WordPress 3.5.0以后有效
		if (!has_filter('wp_kses_allowed_html', array($this, 'allowedHtml')))
			add_filter('wp_kses_allowed_html', array($this, 'allowedHtml'));
		
		static $approvedMap = array(
			'pending'	=>	'0',
			'approved'	=>	'1',
			'deleted'	=>	'trash',
			'spam'		=>	'spam',
			'thread-deleted'=>'post-trashed',
		);
		
		$post_id = isset($post['thread_key'])
			? $post['thread_key']
			: $wpdb->get_var("SELECT post_id FROM $wpdb->postmeta WHERE meta_key = 'duoshuo_thread_id' AND meta_value = $post[thread_id]");
		
		if (!is_numeric($post_id))	//	找不到对应的文章
			return array();
		
		$data = array(
			'comment_author'	=>	trim(strip_tags($post['author_name'])),
	 		'comment_author_email'=>$post['author_email'],
	 		'comment_author_url'=>	$post['author_url'], 
	 		'comment_author_IP'	=>	$post['ip'],
			'comment_date'		=>	$this->rfc3339_to_mysql($post['created_at']), 
	 		'comment_date_gmt'	=>	$this->rfc3339_to_mysql_gmt($post['created_at']),
			'comment_content'	=>	$post['message'], 
	 		'comment_approved'	=>	$approvedMap[$post['status']],
			'comment_agent'		=>	'Duoshuo/' . self::VERSION . ':' . $post['post_id'],
			'comment_type'		=>	$post['type'],
			'comment_post_ID'	=>	$post_id,
			//'comment_karma'
		);
			
		if ($post['parent_id']){
			$parent_id = $wpdb->get_var( "SELECT comment_ID FROM $wpdb->commentmeta WHERE meta_key = 'duoshuo_post_id' AND meta_value = '$post[parent_id]'");
		
			if (isset($parent_id))
				$data['comment_parent'] = $parent_id;
		}
		
		$author_id = isset($post['author_key'])
			? $post['author_key']
			: $wpdb->get_var( "SELECT user_id FROM $wpdb->usermeta WHERE meta_key = 'duoshuo_user_id' AND meta_value = $post[author_id]");
		
		if (is_numeric($author_id))
			$data['user_id'] = $author_id;
		
		if (isset($post['post_key'])){
			$data['comment_ID'] = $post['post_key'];
		}
		elseif(isset($post['post_id'])){
			$data['comment_ID'] = $wpdb->get_var( "SELECT comment_ID FROM $wpdb->commentmeta WHERE meta_key = 'duoshuo_post_id' AND meta_value = '$post[post_id]'");
		}
		
		if(isset($data['comment_ID'])){
			//	wp_update_comment 中会做 wp_filter_comment
			wp_update_comment($data);
		}
		else{
			$data = wp_filter_comment($data);
			$data['comment_ID'] = wp_insert_comment($data);
		}
		
		if ($post['parent_id'])
			update_comment_meta($data['comment_ID'], 'duoshuo_parent_id', $post['parent_id']);
		else
			delete_comment_meta($data['comment_ID'], 'duoshuo_parent_id');
		
        update_comment_meta($data['comment_ID'], 'duoshuo_post_id', $post['post_id']);
        
        return array($post_id);
	}
	
	public function deleteForeverPost($postIdArray){
		global $wpdb;
		
		$commentIdArray = $wpdb->get_col( "SELECT comment_ID FROM $wpdb->commentmeta WHERE meta_key = 'duoshuo_post_id' AND meta_value IN ('" . implode("', '", $postIdArray) . "')");
		
		if (count($commentIdArray)){
			$commentIdArray = $wpdb->get_col( "SELECT comment_ID FROM $wpdb->comments WHERE comment_ID IN ('" . implode("', '", $commentIdArray) . "')");
		
			foreach ($commentIdArray as $commentId)
		        wp_delete_comment($commentId, true);
	    }
	    
	    return array();
	}
	
	public function deletePost($postIdArray){
		global $wpdb;
		
		$commentIdArray = $wpdb->get_col( "SELECT comment_ID FROM $wpdb->commentmeta WHERE meta_key = 'duoshuo_post_id' AND meta_value IN ('" . implode("', '", $postIdArray) . "')");
		
		if (count($commentIdArray)){
			$commentIdArray = $wpdb->get_col( "SELECT comment_ID FROM $wpdb->comments WHERE comment_ID IN ('" . implode("', '", $commentIdArray) . "')");
		
			foreach ($commentIdArray as $commentId)
		        wp_trash_comment($commentId);
	    }
	    
	    return array();
	}
	
	public function spamPost($postIdArray){
		global $wpdb;
		
		$commentIdArray = $wpdb->get_col( "SELECT comment_ID FROM $wpdb->commentmeta WHERE meta_key = 'duoshuo_post_id' AND meta_value IN ('" . implode("', '", $postIdArray) . "')");
		
		if (count($commentIdArray)){
			$commentIdArray = $wpdb->get_col( "SELECT comment_ID FROM $wpdb->comments WHERE comment_ID IN ('" . implode("', '", $commentIdArray) . "')");
		
			foreach($commentIdArray as $commentId)
				wp_spam_comment($commentId);
		}
		
		return array();
	}
	
	public function approvePost($postIdArray){
		global $wpdb;
		
		$commentIdArray = $wpdb->get_col( "SELECT comment_ID FROM $wpdb->commentmeta WHERE meta_key = 'duoshuo_post_id' AND meta_value IN ('" . implode("', '", $postIdArray) . "')");
		
		if (count($commentIdArray)){
			$commentIdArray = $wpdb->get_col( "SELECT comment_ID FROM $wpdb->comments WHERE comment_ID IN ('" . implode("', '", $commentIdArray) . "')");
		
			foreach ($commentIdArray as $commentId)
				wp_set_comment_status($commentId, 'approve');
		}
		
		return array();
	}
	
		
	public function notices(){
		foreach($this->errorMessages as $message)
			echo '<div class="updated"><p><strong>'.$message.'</strong></p></div>';
		
		$duoshuo_notice = $this->getOption('notice');
		if (!empty($duoshuo_notice)){//系统推送的通知
			echo '<div class="updated">'.$duoshuo_notice.'</div>';
		}
		elseif ($duoshuo_notice === false){
			update_option('duoshuo_notice', '');
		}
		
		$messages = array(
			'registered'=>'<strong>注册成功，请同步数据</strong>',
			'reset'		=>'<strong>已重置</strong>',
		);
		if (isset($_GET['message']) && isset($messages[$_GET['message']]))
			echo '<div class="updated"><p>'.$messages[$_GET['message']].'</p></div>';
	}
	
	public function showException($e){
		echo '<div class="updated fade"><p>' . $e->getMessage() . '</p></div>';
	}
	
	public function sendException($e){
		$response = array(
			'code'	=>	$e->getCode(),
			'errorMessage'=>$e->getMessage(),
		);
		echo json_encode($response);
		exit;
	}
	
	public function sendJsonResponse($response){
		if (!headers_sent()) {
			nocache_headers();
			header('Content-type: application/json; charset=UTF-8');
		}
		
        echo json_encode($response);
        exit;
	}
	
	//发布文章时候的同步设置
	public function syncOptions(){
		global $post;
		
		switch($post->post_status){
			case 'auto-draft':
			case 'inherit':
			case 'draft':
			case 'trash':
				break;
			case 'publish':
				break;
			default:
		}
		
		$query = array(
			'callback'	=>	'getSyncOptionsCallback',
			//'require'	=>	'site,visitor,serverTime',
			'jwt'		=>	$this->jwt(),
		);

		if ($post->ID)
			$query['thread_key'] = $post->ID;

        $jsonpUrl = (is_ssl()?'https':'http').'://' . $this->shortName . '.duoshuo.com/api/users/syncOptions.jsonp?' . http_build_query($query, null, '&');
		?>
<script>
function getSyncOptionsCallback(rsp){
	var serviceNames = {
			'weibo'		:	'新浪微博',
			'qq'		:	'QQ',
			'qzone'		:	'QQ空间',
			'qqt'		:	'腾讯微博',
			'renren'	:	'人人网',
			'douban'	:	'豆瓣网',
			'msn'		:	'MSN',
			'netease'	:	'网易微博',
			'kaixin'	:	'开心网',
			'sohu'		:	'搜狐微博',
			'baidu'		:	'百度',
			'taobao'	:	'淘宝网',
	        'google'    :	'谷歌'
		},
		html = '';
	
	if (!rsp.response){
		html += '<p>你还没有绑定社交帐号，绑定后即可同时发布微博</p>';
	}
	else{
		html += '<input type="hidden" name="sync_to[]" value="placeholder" />\
			<ul class="ds-connected-sites">';
		jQuery.each(rsp.response, function(key, info){
			var service = key.split('_')[1];
			html += '\
			<li><label>\
				<input type="checkbox" name="sync_to[]" value="' + key + '"' + (info.checked ? ' checked="checked"' : '') + (info.expired ? ' disabled="disabled" style="visibility:hidden;"' : '') + '/>\
				<span class="service-icon icon-' + service + '"></span>'
				+ serviceNames[service]
				+ (info.avatar_url ? '<img src="' + info.avatar_url + '" alt="' + info.name + '" style="width:16px;height:16px;" />' : '')
				+ info.name
				+ (info.expired ? '(<a href="<?= is_ssl()?'https':'http' ?>://duoshuo.com/settings/accounts/" target="_blank">已过期，请更新授权</a>)' : '')
				+ '</label>\
			</li>';
		});
		html += '<li><label><input type="checkbox" onchange="var c = this.checked;jQuery(\'.ds-connected-sites :checkbox\').each(function(){this.checked = c});" /> 全选</label></li>\
		</ul>\
		<p>温馨提示：系统会优先采用文章摘要来发布微博</p>';
	}
	html += '<p><a href="<?php echo admin_url('admin.php?page=duoshuo-profile');?>">绑定更多社交网站</a></p>';
	jQuery('#duoshuo-sidebox .inside').html(html);
}
(function() {
	var ds = document.createElement('script');
    ds.type = 'text/javascript';
    ds.async = true;
	ds.charset = 'UTF-8';
	ds.src = '<?php echo $jsonpUrl;?>';
	(document.getElementsByTagName('head')[0] || document.getElementsByTagName('body')[0]).appendChild(ds);
})();
</script>
		<?php 
	}
	
	public function commentStatusMetaBoxOptions($post){?>
		<br /><input name="duoshuo_status" type="hidden" value="enabled" />
		<label for="duoshuo_status" class="selectit"><input name="duoshuo_status" type="checkbox" id="duoshuo_status" value="disabled" <?php checked(get_post_meta($post->ID, 'duoshuo_status', true), 'disabled'); ?> /> <?php _e( '这个页面不启用多说评论框' ); ?></label>
	<?php 
	}
	
	public function savePostDuoshuoStatus($postId){
		if (isset($_POST['duoshuo_status'])){
			if ($_POST['duoshuo_status'] == 'disabled')
				update_post_meta($postId, 'duoshuo_status', 'disabled');
			else
				delete_post_meta($postId, 'duoshuo_status');
		}
	}
	
	public function managePostComments($post){
		//这里应该嵌入一个iframe框
	}
	
	public function syncLogAction(){
		@set_time_limit(0);
		@ini_set('memory_limit', '256M');
		@ini_set('display_errors', $this->getOption('debug'));
		
		try{
			$response = array(
				'count'	=>	$this->syncLog(),
				'code'	=>	0
			);
			$this->sendJsonResponse($response);
		}
		catch(Duoshuo_Exception $e){
			if ($e->getCode() == Duoshuo_Exception::REQUEST_TIMED_OUT){
				$this->connectFailed();
				$this->updateOption('sync_lock',  0);
			}
			
			$this->sendException($e);
		}
	}
	
	public function actionsFilter($actions){
		/**
		 * TODO 
		$actions['ds-comments'] = '<a href="javascript:void(0);">管理评论</a>';
		 */
		return $actions;
	}
	
	public function pluginActionLinks($links, $file) {
		if (empty($this->shortName) || empty($this->secret)) // 如果已经设置好了站点信息，就不显示安装 || !is_numeric($this->getOption('synchronized'))
	    	array_unshift($links, '<a href="' . admin_url('admin.php?page=duoshuo') . '">'.__('Install').'</a>');
		else
			array_unshift($links, '<a href="' . admin_url('admin.php?page=duoshuo-settings') . '">'.__('Settings').'</a>');
	    return $links;
	}
	
	public function dashboardWidget(){
		if ( !$widget_options = get_option( 'dashboard_widget_options' ) )
			$widget_options = array();
	
		if ( !isset($widget_options['dashboard_duoshuo']) )
			$widget_options['dashboard_duoshuo'] = array();
	
		$widgets = get_option( 'dashboard_widget_options' );
		$total_items = isset( $widgets['dashboard_duoshuo'] ) && isset( $widgets['dashboard_duoshuo']['items'] )
			? absint( $widgets['dashboard_duoshuo']['items'] ) : 5;
		
		echo '<ul class="ds-recent-comments" data-num-items="' . $total_items . '"></ul>';
		 
		$this->printScripts();
	}
	
	/**
	 * The recent comments dashboard widget control.
	 *
	 * @since 3.0.0
	 */
	public function dashboardWidgetControl() {
		if ( !$widget_options = get_option( 'dashboard_widget_options' ) )
			$widget_options = array();
	
		if ( !isset($widget_options['dashboard_duoshuo']) )
			$widget_options['dashboard_duoshuo'] = array();
	
		if ( 'POST' == $_SERVER['REQUEST_METHOD'] && isset($_POST['widget-duoshuo']) ) {
			$number = absint( $_POST['widget-duoshuo']['items'] );
			$widget_options['dashboard_duoshuo']['items'] = $number;
			update_option( 'dashboard_widget_options', $widget_options );
		}
	
		$number = isset( $widget_options['dashboard_duoshuo']['items'] ) ? (int) $widget_options['dashboard_duoshuo']['items'] : '';
	
		echo '<p><label for="comments-number">' . __('Number of comments to show:') . '</label>';
		echo '<input id="comments-number" name="widget-duoshuo[items]" type="text" value="' . $number . '" size="3" /></p>';
	}
	
	public function registerSettings(){
		register_setting('duoshuo', 'duoshuo_short_name');
		register_setting('duoshuo', 'duoshuo_secret');
	
		foreach (self::$_defaultOptions as $optionName => $value)
			register_setting('duoshuo', $optionName);
	}
	
	public function updateLocalOptions(){
		foreach (self::$_defaultOptions as $optionName => $value)
			if (isset($_POST[$optionName]))
				update_option($optionName, stripslashes($_POST[$optionName]));

		//stripslashes($_POST['duoshuo_comments_wrapper_intro'])
		//stripslashes($_POST['duoshuo_comments_wrapper_outro'])
	}
}