silverstripe-blog/code/extensions/URLSegmentExtension.php

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2013-08-04 18:38:26 +02:00
<?php
/**
* Adds URLSegment functionality to Tags & Categories
*
* @package silverstripe
* @subpackage blog
*
* @author Michael Strong <github@michaelstrong.co.uk>
2013-08-04 18:38:26 +02:00
**/
class URLSegmentExtension extends DataExtension {
private static $db = array(
"URLSegment" => "Varchar(255)"
);
public function onBeforeWrite() {
$this->owner->generateURLSegment();
}
/**
* Generates a unique URLSegment from the title.
*
* @param $increment
*
* @return string URLSegment
**/
public function generateURLSegment($increment = null) {
$filter = new URLSegmentFilter();
$this->owner->URLSegment = $filter->filter($this->owner->Title);
if(is_int($increment)) $this->owner->URLSegment .= '-' . $increment;
// Check to see if the URLSegment already exists
$duplicate = DataList::create($this->owner->ClassName)->filter(array(
"URLSegment" => $this->owner->URLSegment,
"BlogID" => $this->owner->BlogID
));
if($this->owner->ID) $duplicate = $duplicate->exclude("ID", $this->owner->ID);
if($duplicate->count() > 0) {
$increment = is_int($increment) ? $increment + 1 : 0;
$this->owner->generateURLSegment((int) $increment);
}
return $this->owner->URLSegment;
}
}