common/behaviors/ShowImage.php

<?php
    
    namespace common\behaviors;
    
    use common\modules\file\components\UploaderComponent;
    use yii;
    use yii\base\Behavior;
    use yii\imagine\Image;
    
    class ShowImage extends Behavior
    {
        
        /**
         * Resize image and return its path.
         *
         * @param string              $dir    Original image path
         * @param integer|string      $width  New image width
         * @param null|integer|string $height New image height, set NULL to save ratio
         *
         * @return string Resized image path
         * @throws \Exception
         */
        function minImg($dir, $width, $height = NULL)
        {
            if(empty( $dir )) {
                return '/images/imageNotFound.jpg';
            }
            
            if($width == 'original') {
                $preg = '/\/(.[^\/]*)$/';
                preg_match('/\.(.[^.]*)$/', $dir, $type);
                if(isset( $type[ 1 ] )) {
                    $dir = preg_replace($preg, '/original.' . $type[ 1 ], $dir);
                }
                
            } else {
                $preg = '/\/(.[^\/]*)$/';
                preg_match('/\.(.[^.]*)$/', $dir, $type);
                if(isset( $type[ 1 ] )) {
                    $dir = preg_replace($preg, '/' . $width . 'x' . $height . '.' . $type[ 1 ], $dir);
                    $storage = dirname(yii\helpers\Url::to('@storage'));
                    $filename = $storage . $dir;
                    if(!file_exists($filename)) {
                        
                        $original = $storage . dirname($dir) . '/original.' . $type[ 1 ];
                        $resizer = new UploaderComponent();
                        if(file_exists($original)) {
                            $resizer->resizeImg($width, $height, $original, $filename);
                        } else {
                            $imageNotFound = yii\helpers\Url::to('@storage') . "/imageNotFound" . $width . "x" . $height . ".jpg";
                            if(!file_exists($imageNotFound)) {
                                $resizer->resizeImg($width, $height, yii\helpers\Url::to('@storage') . "/imageNotFound.jpg", $imageNotFound);
                            }
                            return "/storage/imageNotFound" . $width . "x" . $height . ".jpg";
                        }
                        
                    }
                    
                }
                
            }
            return $dir;
        }
        
        /**
         * @param string $array String to split
         *
         * @return array Array of image paths
         */
        function ShowGallery($array)
        {
            
            $gallery = explode(',', $array);
            if(is_array($gallery)) {
                array_splice($gallery, -1);
                return $gallery;
            } else {
                return [];
            }
            
        }
        
        public function ShowAvatar($dir, $width, $height = NULL)
        {
            if(empty( $dir )) {
                return '/images/avatar-bg.png';
            } else {
                return $this->minImg($dir, $width, $height);
            }
        }
    
        /**
         * Add watermark to image
         *
         * @param string $path image path
         *
         * @return yii\base\Component
         */
        public function watermark($path)
        {
            $watermark_path = Yii::getAlias('@webroot/images/watermark.png');
            $image = Image::getImagine()
                          ->open($path);
            $watermark = Image::getImagine()
                              ->open($watermark_path);
            $image_size = $image->getSize();
            $watermark_size = $watermark->getSize();
            if($image_size->getWidth() < ($watermark_size->getWidth() + 20) || ($image_size->getHeight() + 20) < $watermark_size->getHeight()) {
                return $this->owner;
            }
            $position_left = $image_size->getWidth() - ($watermark_size->getWidth() + 10);
            Image::watermark($path, $watermark_path, [$position_left, 10])->save(preg_replace('/^(.*)(\.\w+)$/', '${1}_watermark${2}', $path));
            return $this->owner;
        }
    
        function getWatermark($path, $width, $height = NULL)
        {
            if($width == 'original') {
                $path_original = $this->minImg($path, 'original');
                $path_watermark = str_replace('original', 'original_watermark', $path_original);
                if(!file_exists(Yii::getAlias('@documentRoot').$path_watermark)) {
                    $this->watermark(Yii::getAlias('@documentRoot').$path_original);
                }
                return $path_watermark;
            } else {
                $path_original = $this->minImg($path, $width, $height);
                preg_match('/^.*(\.\w+)$/', $path_original, $extension);
                $path_watermark = $path_original;
                if(isset($extension[1])) {
                    $path_watermark = str_replace($extension[1], '_watermark'.$extension[1], $path_original);
                }
                if(!file_exists(Yii::getAlias('@documentRoot').$path_watermark)) {
                    $this->watermark(Yii::getAlias('@documentRoot').$path_original);
                }
                return $path_watermark;
            }
        }
        
    }