silverstripe-googlesitemaps/code/GoogleSitemapDecorator.php

132 lines
3.8 KiB
PHP

<?php
/**
* Decorate the page object to provide google sitemaps with
* additionally options and configuration.
*
* @package googlesitemaps
*/
class GoogleSitemapDecorator extends DataExtension {
}
/**
* @package googlesitemaps
*/
class GoogleSitemapSiteTreeDecorator extends DataExtension {
function extraStatics($class = null, $extension = null) {
return array(
'db' => array(
"Priority" => "Varchar(5)",
),
);
}
function updateSettingsFields(&$fields) {
$prorities = array(
'' => _t('SiteTree.PRIORITYAUTOSET', 'Auto-set based on page depth'),
'-1' => _t('SiteTree.PRIORITYNOTINDEXED', "Not indexed"), // We set this to -ve one because a blank value implies auto-generation of Priority
'1.0' => '1 - ' . _t('SiteTree.PRIORITYMOSTIMPORTANT', "Most important"),
'0.9' => '2',
'0.8' => '3',
'0.7' => '4',
'0.6' => '5',
'0.5' => '6',
'0.4' => '7',
'0.3' => '8',
'0.2' => '9',
'0.1' => '10 - ' . _t('SiteTree.PRIORITYLEASTIMPORTANT', "Least important")
);
$tabset = $fields->findOrMakeTab('Root.Settings');
$message = "<p>";
$message .= sprintf(_t('SiteTree.METANOTEPRIORITY', "Manually specify a Google Sitemaps priority for this page (%s)"),
'<a href="http://www.google.com/support/webmasters/bin/answer.py?hl=en&answer=71936#prioritize" target="_blank">?</a>'
);
$message .= "</p>";
$tabset->push(new Tab('GoogleSitemap', _t('SiteTree.TABGOOGLESITEMAP', 'Google Sitemap'),
new LiteralField("GoogleSitemapIntro", $message),
new DropdownField("Priority", $this->owner->fieldLabel('Priority'), $prorities)
));
}
function updateFieldLabels(&$labels) {
parent::updateFieldLabels($labels);
$labels['Priority'] = _t('SiteTree.METAPAGEPRIO', "Page Priority");
}
function onAfterPublish() {
GoogleSitemap::ping();
}
function onAfterUnpublish() {
GoogleSitemap::ping();
}
/**
* The default value of the priority field depends on the depth of the page in
* the site tree, so it must be calculated dynamically.
*
* @return float
*/
function getPriority() {
if(!$this->owner->getField('Priority')) {
$parentStack = $this->owner->parentStack();
$numParents = is_array($parentStack) ? count($parentStack) - 1 : 0;
return max(0.1, 1.0 - ($numParents / 10));
}
elseif ($this->owner->getField('Priority') == -1) {
return 0;
}
else {
$priority = abs($this->owner->getField('Priority'));
return (is_float($priority) && $priority <= 1.0) ? $priority : 0.5;
}
}
/**
* Set a pages change frequency calculated by pages age and number of versions.
* Google expects always, hourly, daily, weekly, monthly, yearly or never as values.
*
* @return void
*/
public function setChangeFrequency() {
// The one field that isn't easy to deal with in the template is
// Change frequency, so we set that here.
$date = date('Y-m-d H:i:s');
$prop = $this->owner->toMap();
$created = new SS_Datetime();
$created->value = (isset($prop['Created'])) ? $prop['Created'] : $date;
$now = new SS_Datetime();
$now->value = $date;
$versions = (isset($prop['Version'])) ? $prop['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) {
$this->owner->ChangeFreq = 'yearly';
} elseif ($period > 60 * 60 * 24 * 30) {
$this->owner->ChangeFreq = 'monthly';
} elseif ($period > 60 * 60 * 24 * 7) {
$this->owner->ChangeFreq = 'weekly';
} elseif ($period > 60 * 60 * 24) {
$this->owner->ChangeFreq = 'daily';
} elseif ($period > 60 * 60) {
$this->owner->ChangeFreq = 'hourly';
} else {
$this->owner->ChangeFreq = 'always';
}
}
}