Slug.php
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<?php
namespace common\behaviors;
use yii;
use yii\base\Behavior;
use yii\db\ActiveRecord;
use dosamigos\transliterator\TransliteratorHelper;
class Slug extends Behavior
{
/**
* @var string
*/
public $inAttribute = 'title';
/**
* @var string
*/
public $outAttribute = 'alias';
/**
* @var bool
*/
public $translit = true;
/**
* @inheritdoc
*/
public function events()
{
return [
ActiveRecord::EVENT_BEFORE_INSERT => 'getSlug',
ActiveRecord::EVENT_BEFORE_UPDATE => 'getSlug',
];
}
/**
* Generate slug
*
* @param yii\base\Event $event
*
* @return void
*/
public function getSlug($event)
{
if(!empty( $this->owner->{$this->inAttribute} )) {
if(empty( $this->owner->{$this->outAttribute} )) {
$this->owner->{$this->outAttribute} = $this->generateSlug($this->owner->{$this->inAttribute});
} else {
$this->owner->{$this->outAttribute} = $this->generateSlug($this->owner->{$this->outAttribute});
}
}
}
/**
* @param string $slug
*
* @return string
*/
private function generateSlug($slug)
{
$slug = $this->slugify($slug);
if($this->checkUniqueSlug($slug)) {
return $slug;
} else {
for($suffix = 2; !$this->checkUniqueSlug($new_slug = $slug . '-' . $suffix); $suffix++) {
}
return $new_slug;
}
}
/**
* @param string $slug
*
* @return string
*/
private function slugify($slug)
{
if($this->translit) {
return yii\helpers\Inflector::slug(TransliteratorHelper::process($slug), '-', true);
} else {
return $this->slug($slug, '-', true);
}
}
/**
* @param string $string
* @param string $replacement
* @param bool $lowercase
*
* @return string
*/
private function slug($string, $replacement = '-', $lowercase = true)
{
$string = preg_replace('/[^\p{L}\p{Nd}]+/u', $replacement, $string);
$string = trim($string, $replacement);
return $lowercase ? strtolower($string) : $string;
}
/**
* Check whether current slug is unique
*
* @param string $slug
*
* @return bool
*/
private function checkUniqueSlug($slug)
{
/**
* @var ActiveRecord $owner
*/
$owner = $this->owner;
$query = $owner->find()
->where([
$this->outAttribute => $slug,
]);
if(!$owner->isNewRecord) {
$pks = $owner->primaryKey();
if(!empty( $pks )) {
$pk_rules = [ 'and' ];
foreach($pks as $pk) {
$pk_rules[] = [ $pk => $owner->$pk ];
}
$query->andWhere([
'not',
$pk_rules,
]);
}
}
return !$query->exists();
}
}