273 lines
6.8 KiB
PHP
273 lines
6.8 KiB
PHP
<?php
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/**
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* Initial implementation of Sitemap support.
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* GoogleSitemap should handle requests to 'sitemap.xml'
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* the other two classes are used to render the sitemap.
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*
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* You can notify ("ping") Google about a changed sitemap
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* automatically whenever a new page is published or unpublished.
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* By default, Google is not notified, and will pick up your new
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* sitemap whenever the GoogleBot visits your website.
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*
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* Enabling notification of Google after every publish (in your _config.php):
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*
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* <example>
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* GoogleSitemap::enable_google_notificaton();
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* </example>
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*
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* @see http://www.google.com/support/webmasters/bin/answer.py?hl=en&answer=34609
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*
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* @package googlesitemaps
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*/
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class GoogleSitemap extends Controller {
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/**
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* @var array
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*/
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public static $allowed_actions = array(
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'index'
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);
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/**
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* @var boolean
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*/
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protected static $enabled = true;
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/**
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* @var boolean
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*/
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protected static $google_notification_enabled = false;
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/**
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* @var boolean
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*/
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protected static $use_show_in_search = true;
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/**
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* List of DataObjects to show in sitemap.xml
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*
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* @var array
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*/
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public static $google_sitemap_dataobjects = array();
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/**
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* List of DataObjects change frequency
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*
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* @var array
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*/
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public static $google_sitemap_dataobjects_changefreq = array();
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/**
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* List of DataObjects priority
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*
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* @var array
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*/
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public static $google_sitemap_dataobjects_priority = array();
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/**
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* Decorates the given DataObject with {@link GoogleSitemapDecorator}
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* and pushes the class name to the registered DataObjects.
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* Note that all registered DataObjects need the method AbsoluteLink().
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*
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* @param string $className name of DataObject to register
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* @param string $changeFreq how often is this DataObject updated?
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* Possible values:
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* always, hourly, daily, weekly, monthly, yearly, never
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* @param string $priority How important is this DataObject in comparison to other urls?
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* Possible values: 0.1, 0.2 ... , 0.9, 1.0
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*
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* @return void
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*/
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public static function register_dataobject($className, $changeFreq = 'monthly', $priority = '0.6') {
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if (!self::is_registered($className)) {
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Object::add_extension($className, 'GoogleSitemapDecorator');
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self::$google_sitemap_dataobjects[] = $className;
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if (!$changeFreq) {
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self::$google_sitemap_dataobjects_changefreq[] = "monthly";
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} else {
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self::$google_sitemap_dataobjects_changefreq[] = $changeFreq;
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}
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self::$google_sitemap_dataobjects_priority[] = $priority;
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}
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}
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/**
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* Checks whether the given class name is already registered or not.
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*
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* @param string $className Name of DataObject to check
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*
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* @return bool
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*/
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public static function is_registered($className) {
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return in_array($className, self::$google_sitemap_dataobjects);
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}
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/**
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* Adds DataObjects to the existing DataObjectSet with pages from the
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* site tree
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*
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* @return ArrayList
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*/
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protected function addRegisteredDataObjects() {
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$output = new ArrayList();
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foreach(self::$google_sitemap_dataobjects as $index => $className) {
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$dataObjectSet = DataObject::get($className);
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if($dataObjectSet) {
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foreach($dataObjectSet as $dataObject) {
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if($dataObject->canView()) {
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$dataObject->ChangeFreq = self::$google_sitemap_dataobjects_changefreq[$index];
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if(!isset($dataObject->Priority)) {
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$dataObject->Priority = self::$google_sitemap_dataobjects_priority[$index];
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}
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$output->push($dataObject);
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}
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}
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}
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}
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return $output;
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}
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/**
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* Returns all the links to {@link SiteTree} pages and
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* {@link DataObject} urls on the page.
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*
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* @return DataObjectSet
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*/
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public function Items() {
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$filter = '';
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$bt = defined('DB::USE_ANSI_SQL') ? "\"" : "`";
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if(self::$use_show_in_search) {
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$filter = "{$bt}ShowInSearch{$bt} = 1";
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}
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$pages = class_exists('SiteTree') ? Versioned::get_by_stage('SiteTree', 'Live', $filter) : false;
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$newPages = new ArrayList();
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if($pages) {
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foreach($pages as $page) {
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// Only include pages from this host and pages which are not an
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// instance of ErrorPage. We prefix $_SERVER['HTTP_HOST'] with
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// 'http://' so that parse_url to help parse_url identify the
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// host name component; we could use another protocol (like ftp
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// as the prefix and the code would work the same.
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$pageHttp = parse_url($page->AbsoluteLink(), PHP_URL_HOST);
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$hostHttp = parse_url('http://' . $_SERVER['HTTP_HOST'], PHP_URL_HOST);
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if(($pageHttp == $hostHttp) && !($page instanceof ErrorPage)) {
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// If the page has been set to 0 priority, we set a flag so
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// it won't be included
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if($page->canView() && (!isset($page->Priority) || $page->Priority > 0)) {
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$page->setChangeFrequency();
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$newPages->push($page);
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}
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}
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}
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}
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$newPages->merge($this->addRegisteredDataObjects());
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return $newPages;
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}
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/**
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* Notifies Google about changes to your sitemap.
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*
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* Triggered automatically on every publish/unpublish of a page.
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* This behaviour is disabled by default, enable with:
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*
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* <code>
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* GoogleSitemap::enable_google_notificaton();
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* </code>
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*
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* If the site is in "dev-mode", no ping will be sent regardless wether
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* the Google notification is enabled.
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*
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* @return string Response text
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*/
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static function ping() {
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if(!self::$enabled) return false;
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//Don't ping if the site has disabled it, or if the site is in dev mode
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if(!GoogleSitemap::$google_notification_enabled || Director::isDev())
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return;
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$location = urlencode(Controller::join_links(
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Director::absoluteBaseURL(),
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'sitemap.xml'
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));
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$response = HTTP::sendRequest(
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"www.google.com",
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"/webmasters/sitemaps/ping",
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sprintf("sitemap=%s", $location)
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);
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return $response;
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}
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/**
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* Enable pings to google.com whenever sitemap changes.
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*
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* @return void
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*/
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public static function enable_google_notification() {
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self::$google_notification_enabled = true;
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}
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/**
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* Disables pings to google when the sitemap changes.
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*
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* @return void
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*/
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public static function disable_google_notification() {
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self::$google_notification_enabled = false;
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}
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/**
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* Default controller handler for the sitemap.xml file
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*/
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function index($url) {
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if(self::$enabled) {
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SSViewer::set_source_file_comments(false);
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$this->getResponse()->addHeader('Content-Type', 'application/xml; charset="utf-8"');
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// But we want to still render.
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return array();
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} else {
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return new SS_HTTPResponse('Page not found', 404);
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}
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}
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/**
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* Enable the sitemap.xml file
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*
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* @return void
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*/
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public static function enable() {
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self::$enabled = true;
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}
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/**
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* Disable the sitemap.xml file
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*
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* @return void
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*/
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public static function disable() {
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self::$enabled = false;
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}
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}
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