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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
{
public $in_attribute = 'name';
public $out_attribute = 'slug';
public $translit = true;
public function events()
{
return [
ActiveRecord::EVENT_BEFORE_INSERT=> 'getSlug',
ActiveRecord::EVENT_BEFORE_UPDATE=> 'getSlug'
];
}
public function getSlug( $event )
{
if(!empty($this->owner->{$this->in_attribute})){
if ( empty( $this->owner->{$this->out_attribute} ) ) {
$this->owner->{$this->out_attribute} = $this->generateSlug( $this->owner->{$this->in_attribute} );
} else {
$this->owner->{$this->out_attribute} = $this->generateSlug( $this->owner->{$this->out_attribute} );
}
}
}
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;
}
}
private function slugify( $slug )
{
if ( $this->translit ) {
return yii\helpers\Inflector::slug( TransliteratorHelper::process( $slug ), '-', true );
} else {
return $this->slug( $slug, '-', true );
}
}
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;
}
private function checkUniqueSlug( $slug )
{
$pk = $this->owner->primaryKey();
$pk = $pk[0];
$condition = $this->out_attribute . ' = :out_attribute';
$params = [ ':out_attribute' => $slug ];
if ( !$this->owner->isNewRecord ) {
$condition .= ' and ' . $pk . ' != :pk';
$params[':pk'] = $this->owner->{$pk};
}
return !$this->owner->find()
->where( $condition, $params )
->one();
}
}
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