<?php
    
    namespace common\behaviors;
    
    use yii\base\Behavior;
    use yii\base\ModelEvent;
    use yii\db\ActiveRecord;
    use yii\web\UploadedFile;
    /**
     * Class Save Image Behavior
     * @property ActiveRecord $owner
     * @package common\behaviors
     */
    class SaveImgBehavior extends Behavior
    {
        
        public $fields;
        public $is_language = false;
        
        public function events()
        {
            return [
                ActiveRecord::EVENT_BEFORE_UPDATE => 'beforeSave',
                ActiveRecord::EVENT_BEFORE_INSERT => 'beforeSave',
            ];
        }
    
        /**
         * @param ModelEvent $event
         */
        public function beforeSave($event) {
            foreach($this->fields as $field){
                $field_name = $field['name'];
                $name = $field_name;
                if($this->is_language) {
                    $name = '['.$this->owner->language_id.']'.$name;
                }
    
                $image = UploadedFile::getInstance($this->owner, $name);
                
                if(empty($image) && $event->name == ActiveRecord::EVENT_BEFORE_UPDATE) {
                    $this->owner->$field_name = $this->owner->getOldAttribute($field_name);
                } elseif(!empty($image)) {
                    $imgDir = \Yii::getAlias('@storage/'.$field['directory'].'/');
            
                    if(!is_dir($imgDir)) {
                        mkdir($imgDir, 0755, true);
                    }
                    
                    $baseName = $image->baseName;
                    
                    $iteration = 0;
                    $file_name = $imgDir.$baseName.'.'.$image->extension;
                    while(file_exists($file_name)) {
                        $baseName = $image->baseName.'_'.++$iteration;
                        $file_name = $imgDir.$baseName.'.'.$image->extension;
                    }
                    unset($iteration);
                    
                    $this->owner->$field_name = $baseName.'.'.$image->extension;
                    
                    $image->saveAs($file_name);
                }
            }
        }
                
        public function getImageFile($image = 'image') {
            return empty($this->owner->$image) ? null : '/storage/'.$this->fields[0]['directory'].'/'. $this->owner->$image;
        }
        
        public function getImageUrl($image = 'image') {
            return empty($this->owner->$image) ? null : '/storage/'.$this->fields[0]['directory'].'/'. $this->owner->$image;
        }
        
        
        
    }