144 lines
3.7 KiB
PHP
144 lines
3.7 KiB
PHP
<?php
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/**
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* Decorate the page object to provide google sitemaps with
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* additionally options and configuration.
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*
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* @package googlesitemaps
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*/
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class GoogleSitemapDecorator extends DataExtension {
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}
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/**
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* @package googlesitemaps
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*/
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class GoogleSitemapSiteTreeDecorator extends DataExtension {
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/**
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* @var array
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*/
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public static $db = array(
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"Priority" => "Varchar(5)"
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);
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/**
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* @param FieldList
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*/
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public function updateSettingsFields(&$fields) {
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$prorities = array(
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'' => _t('SiteTree.PRIORITYAUTOSET', 'Auto-set based on page depth'),
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'-1' => _t('SiteTree.PRIORITYNOTINDEXED', "Not indexed"), // We set this to -ve one because a blank value implies auto-generation of Priority
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'1.0' => '1 - ' . _t('SiteTree.PRIORITYMOSTIMPORTANT', "Most important"),
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'0.9' => '2',
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'0.8' => '3',
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'0.7' => '4',
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'0.6' => '5',
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'0.5' => '6',
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'0.4' => '7',
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'0.3' => '8',
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'0.2' => '9',
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'0.1' => '10 - ' . _t('SiteTree.PRIORITYLEASTIMPORTANT', "Least important")
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);
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$tabset = $fields->findOrMakeTab('Root.Settings');
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$message = "<p>";
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$message .= sprintf(_t('SiteTree.METANOTEPRIORITY', "Manually specify a Google Sitemaps priority for this page (%s)"),
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'<a href="http://www.google.com/support/webmasters/bin/answer.py?hl=en&answer=71936#prioritize" target="_blank">?</a>'
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);
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$message .= "</p>";
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$tabset->push(new Tab('GoogleSitemap', _t('SiteTree.TABGOOGLESITEMAP', 'Google Sitemap'),
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new LiteralField("GoogleSitemapIntro", $message),
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new DropdownField("Priority", $this->owner->fieldLabel('Priority'), $prorities)
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));
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}
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public function updateFieldLabels(&$labels) {
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parent::updateFieldLabels($labels);
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$labels['Priority'] = _t('SiteTree.METAPAGEPRIO', "Page Priority");
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}
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/**
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* @return void
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*/
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public function onAfterPublish() {
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GoogleSitemap::ping();
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}
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/**
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* @return void
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*/
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public function onAfterUnpublish() {
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GoogleSitemap::ping();
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}
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/**
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* The default value of the priority field depends on the depth of the page in
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* the site tree, so it must be calculated dynamically.
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*
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* @return float
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*/
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public function getPriority() {
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if(!$this->owner->getField('Priority')) {
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$parentStack = $this->owner->parentStack();
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$numParents = is_array($parentStack) ? count($parentStack) - 1 : 0;
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return max(0.1, 1.0 - ($numParents / 10));
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}
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elseif ($this->owner->getField('Priority') == -1) {
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return -1;
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}
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else {
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$priority = abs($this->owner->getField('Priority'));
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return (is_float($priority) && $priority <= 1.0) ? $priority : 0.5;
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}
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}
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/**
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* Returns a pages change frequency calculated by pages age and number of
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* versions. Google expects always, hourly, daily, weekly, monthly, yearly
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* or never as values.
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*
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* @see http://support.google.com/webmasters/bin/answer.py?hl=en&answer=183668&topic=8476&ctx=topic
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*
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* @return SS_Datetime
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*/
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public function getChangeFrequency() {
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$date = date('Y-m-d H:i:s');
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$prop = $this->owner->toMap();
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$created = new SS_Datetime();
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$created->value = (isset($prop['Created'])) ? $prop['Created'] : $date;
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$now = new SS_Datetime();
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$now->value = $date;
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$versions = (isset($prop['Version'])) ? $prop['Version'] : 1;
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$timediff = $now->format('U') - $created->format('U');
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// Check how many revisions have been made over the lifetime of the
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// Page for a rough estimate of it's changing frequency.
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$period = $timediff / ($versions + 1);
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if ($period > 60 * 60 * 24 * 365) {
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$freq = 'yearly';
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} elseif ($period > 60 * 60 * 24 * 30) {
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$freq = 'monthly';
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} elseif ($period > 60 * 60 * 24 * 7) {
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$freq = 'weekly';
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} elseif ($period > 60 * 60 * 24) {
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$freq = 'daily';
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} elseif ($period > 60 * 60) {
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$freq = 'hourly';
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} else {
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$freq = 'always';
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}
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return $freq;
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}
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}
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