1 <?php
 2 
 3 /**
 4  * Decorate the page object to provide google sitemaps with 
 5  * additionally options and configuration.
 6  * 
 7  * @package googlesitemaps
 8  */
 9 class GoogleSitemapDecorator extends SiteTreeDecorator {
10     
11     function extraStatics() {
12         return array(
13             'db' => array(
14                 "Priority" => "Varchar(5)",
15             )
16         );
17     }
18     
19     function updateCMSFields(&$fields) {
20         $pagePriorities = array(
21             '' => _t('SiteTree.PRIORITYAUTOSET','Auto-set based on page depth'),
22             '-1' => _t('SiteTree.PRIORITYNOTINDEXED', "Not indexed"), // We set this to -ve one because a blank value implies auto-generation of Priority
23             '1.0' => '1 - ' . _t('SiteTree.PRIORITYMOSTIMPORTANT', "Most important"),
24             '0.9' => '2',
25             '0.8' => '3',
26             '0.7' => '4',
27             '0.6' => '5',
28             '0.5' => '6',
29             '0.4' => '7',
30             '0.3' => '8',
31             '0.2' => '9',
32             '0.1' => '10 - ' . _t('SiteTree.PRIORITYLEASTIMPORTANT', "Least important")
33         );
34         
35         $fields->addFieldsToTab('Root.Content.Metadata', array(
36             new LiteralField(
37                 "GoogleSitemapIntro", 
38                 "<p>" .
39                 sprintf(
40                     _t(
41                         'SiteTree.METANOTEPRIORITY', 
42                         "Manually specify a Google Sitemaps priority for this page (%s)"
43                     ),
44                     '<a href="http://www.google.com/support/webmasters/bin/answer.py?hl=en&answer=71936#prioritize" target="_blank">?</a>'
45                 ) .
46                 "</p>"
47             ), 
48             new DropdownField("Priority", $this->owner->fieldLabel('Priority'), $pagePriorities)
49         ));
50     }
51     
52     function updateFieldLabels(&$labels) {
53         parent::updateFieldLabels($labels);
54         
55         $labels['Priority'] = _t('SiteTree.METAPAGEPRIO', "Page Priority");
56     }
57     
58     function onAfterPublish() {
59         GoogleSitemap::ping();
60     }
61     
62     function onAfterUnpublish() {
63         GoogleSitemap::ping();
64     }
65     
66     /**
67      * The default value of the priority field depends on the depth of the page in
68      * the site tree, so it must be calculated dynamically.
69      */
70     function getPriority() {
71         if ($this->owner->getField('Priority')) 
72             return $this->owner->getField('Priority');
73 
74         if ($this->owner->Parent()->Priority < 0) 
75             return -1;
76         $parentStack = $this->owner->parentStack();
77         $numParents = is_array($parentStack) ? count($parentStack) - 1: 0;
78         return max(0.1, 1.0 - ($numParents / 10));
79     }
80 }
81 
82