* * @see http://www.google.com/support/webmasters/bin/answer.py?hl=en&answer=34609 * * @package googlesitemaps */ class GoogleSitemap extends Controller { /** * @var boolean */ protected static $enabled = true; /** * @var DataObjectSet */ protected $Pages; /** * @var boolean */ protected static $google_notification_enabled = false; /** * @var boolean */ protected static $use_show_in_search = true; public function Items() { $filter = ''; $bt = defined('DB::USE_ANSI_SQL') ? "\"" : "`"; if(self::$use_show_in_search) { $filter = "{$bt}ShowInSearch{$bt} = 1"; } $this->Pages = Versioned::get_by_stage('SiteTree', 'Live', $filter); $newPages = new DataObjectSet(); if($this->Pages) { foreach($this->Pages as $page) { // Only include pages from this host and pages which are not an instance of ErrorPage // We prefix $_SERVER['HTTP_HOST'] with 'http://' so that parse_url to help parse_url identify the host name component; we could use another protocol (like // 'ftp://' as the prefix and the code would work the same. if(parse_url($page->AbsoluteLink(), PHP_URL_HOST) == parse_url('http://' . $_SERVER['HTTP_HOST'], PHP_URL_HOST) && !($page instanceof ErrorPage)) { // If the page has been set to 0 priority, we set a flag so it won't be included if($page->canView() && (!isset($page->Priority) || $page->Priority > 0)) { $created = $page->dbObject('Created'); $now = new SS_Datetime(); $now->value = date('Y-m-d H:i:s'); $versions = $page->Version; $timediff = $now->format('U') - $created->format('U'); // Check how many revisions have been made over the lifetime of the // Page for a rough estimate of it's changing frequency. $period = $timediff / ($versions + 1); if($period > 60*60*24*365) { // > 1 year $page->ChangeFreq='yearly'; } elseif($period > 60*60*24*30) { // > ~1 month $page->ChangeFreq='monthly'; } elseif($period > 60*60*24*7) { // > 1 week $page->ChangeFreq='weekly'; } elseif($period > 60*60*24) { // > 1 day $page->ChangeFreq='daily'; } elseif($period > 60*60) { // > 1 hour $page->ChangeFreq='hourly'; } else { // < 1 hour $page->ChangeFreq='always'; } $newPages->push($page); } } } return $newPages; } } /** * Notifies Google about changes to your sitemap. * Triggered automatically on every publish/unpublish of a page. * This behaviour is disabled by default, enable with: * GoogleSitemap::enable_google_notificaton(); * * If the site is in "dev-mode", no ping will be sent regardless wether * the Google notification is enabled. * * @return string Response text */ static function ping() { if(!self::$enabled) return false; //Don't ping if the site has disabled it, or if the site is in dev mode if(!GoogleSitemap::$google_notification_enabled || Director::isDev()) return; $location = urlencode(Director::absoluteBaseURL() . '/sitemap.xml'); $response = HTTP::sendRequest("www.google.com", "/webmasters/sitemaps/ping", "sitemap=" . $location); return $response; } /** * Enable pings to google.com whenever sitemap changes. */ public static function enable_google_notification() { self::$google_notification_enabled = true; } /** * Disables pings to google when the sitemap changes. */ public static function disable_google_notification() { self::$google_notification_enabled = false; } function index($url) { if(self::$enabled) { SSViewer::set_source_file_comments(false); $this->getResponse()->addHeader('Content-Type', 'application/xml; charset="utf-8"'); // But we want to still render. return array(); } else { return new SS_HTTPResponse('Not allowed', 405); } } public static function enable() { self::$enabled = true; } public static function disable() { self::$enabled = false; } }