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common/behaviors/Slug.php 2.1 KB
a8370482   Alexander Karnovsky   init project
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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_VALIDATE => 'getSlug'
          ];
      }
  
      public function getSlug( $event )
      {
          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();
      }
  
  }