silverstripe-framework/core/control/Sitemap.php

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<?php
/**
* Initial implementation of Sitemap support.
* SitemapController should handle requests to 'sitemap.xml'
* the other two classes are used to render the sitemap
*/
class Sitemap extends Controller {
protected $Pages;
function __construct()
{
$this->Pages=DataObject::get('SiteTree');
}
public function Items()
{
foreach($this->Pages as $page)
{
// If the page has been set to 0 priority, we set a flag so it won't be included
if(isset($page->Priority) && $page->Priority <= 0)
$page->Include = false;
else
$page->Include = true;
// The one field that isn't easy to deal with in the template is
// Change frequency, so we set that here.
$properties = $page->toMap();
$created = new Datetime($properties['Created']);
$now = new Datetime();
$versions = $properties['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
{
$page->ChangeFreq='yearly';
}
else if($period > 60*60*24*30) // > ~1 month
{
$page->ChangeFreq='monthly';
}
else if($period > 60*60*24*7) // > 1 week
{
$page->ChangeFreq='weekly';
}
else if($period > 60*60*24) // > 1 day
{
$page->ChangeFreq='daily';
}
else if($period > 60*60) // > 1 hour
{
$page->ChangeFreq='hourly';
}
else // < 1 hour
{
$page->ChangeFreq='always';
}
}
return $this->Pages;
}
static function Ping()
{
//Don't ping if the site has disabled it
if(!Sitemap::$pings)
return;
$location = urlencode(Director::absoluteBaseURL() . '/sitemap.xml');
$response = HTTP::sendRequest("www.google.com", "/webmasters/sitemaps/ping",
"sitemap=" . $location);
return $response;
}
protected static $pings = true;
/**
* Disables pings to google when the sitemap changes
* To use this, in your _config.php file simply include the line
* Sitemap::DisableGoogleNotification();
*/
static function DisableGoogleNotification()
{
self::$pings = false;
}
function index($url)
{
// We need to override the default content-type
ContentNegotiator::disable();
header('Content-type: application/xml; charset="utf-8"');
// But we want to still render.
return array();
}
}
?>