117 lines
2.7 KiB
PHP
117 lines
2.7 KiB
PHP
<?php
|
|
|
|
/**
|
|
* Decorate the page object to provide google sitemaps with
|
|
* additionally options and configuration.
|
|
*
|
|
* @package googlesitemaps
|
|
*/
|
|
class GoogleSitemapExtension extends DataExtension {
|
|
|
|
/**
|
|
* @return boolean
|
|
*/
|
|
public function canIncludeInGoogleSitemap() {
|
|
$can = true;
|
|
|
|
if(method_exists($this, 'AbsoluteLink')) {
|
|
$objHttp = parse_url($this->AbsoluteLink(), PHP_URL_HOST);
|
|
$hostHttp = parse_url('http://' . $_SERVER['HTTP_HOST'], PHP_URL_HOST);
|
|
|
|
if($objHttp != $hostHttp) {
|
|
$can = false;
|
|
}
|
|
}
|
|
|
|
if($can) {
|
|
$can = $this->owner->canView();
|
|
}
|
|
|
|
if($can) {
|
|
$can = $this->owner->getGooglePriority();
|
|
}
|
|
|
|
$this->owner->extend('alterCanIncludeInGoogleSitemap', $can);
|
|
|
|
return $can;
|
|
}
|
|
|
|
|
|
/**
|
|
* @return void
|
|
*/
|
|
public function onAfterPublish() {
|
|
GoogleSitemap::ping();
|
|
}
|
|
|
|
/**
|
|
* @return void
|
|
*/
|
|
public function onAfterUnpublish() {
|
|
GoogleSitemap::ping();
|
|
}
|
|
|
|
|
|
/**
|
|
* The default value of the priority field depends on the depth of the page in
|
|
* the site tree, so it must be calculated dynamically.
|
|
*
|
|
* @return mixed
|
|
*/
|
|
public function getGooglePriority() {
|
|
$field = $this->owner->hasField('Priority');
|
|
|
|
if(isset($this->Priority) || ($field && $this->Priority = $this->owner->getField('Priority'))) {
|
|
return ($this->Priority < 0) ? false : $this->Priority;
|
|
}
|
|
|
|
return GoogleSitemap::get_priority_for_class($this->owner->class);
|
|
}
|
|
|
|
/**
|
|
* Returns a pages change frequency calculated by pages age and number of
|
|
* versions. Google expects always, hourly, daily, weekly, monthly, yearly
|
|
* or never as values.
|
|
*
|
|
* @see http://support.google.com/webmasters/bin/answer.py?hl=en&answer=183668&topic=8476&ctx=topic
|
|
*
|
|
* @return SS_Datetime
|
|
*/
|
|
public function getChangeFrequency() {
|
|
if($freq = GoogleSitemap::get_frequency_for_class($this->owner->class)) {
|
|
return $freq;
|
|
}
|
|
|
|
$date = date('Y-m-d H:i:s');
|
|
|
|
$created = new SS_Datetime();
|
|
$created->value = ($this->owner->Created) ? $this->owner->Created : $date;
|
|
|
|
$now = new SS_Datetime();
|
|
$now->value = $date;
|
|
|
|
$versions = ($this->owner->Version) ? $this->owner->Version : 1;
|
|
$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) {
|
|
$freq = 'yearly';
|
|
} elseif ($period > 60 * 60 * 24 * 30) {
|
|
$freq = 'monthly';
|
|
} elseif ($period > 60 * 60 * 24 * 7) {
|
|
$freq = 'weekly';
|
|
} elseif ($period > 60 * 60 * 24) {
|
|
$freq = 'daily';
|
|
} elseif ($period > 60 * 60) {
|
|
$freq = 'hourly';
|
|
} else {
|
|
$freq = 'always';
|
|
}
|
|
|
|
return $freq;
|
|
}
|
|
}
|