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
{
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();
}
}