CloudinaryImage.php

<?php

namespace Silvanite\NovaFieldCloudinary\Fields;

use Illuminate\Http\Request;
use Laravel\Nova\Fields\Image;
use Illuminate\Support\Facades\Storage;

class CloudinaryImage extends Image
{
    use CloudinaryOptions;

    /**
     * Create a new field.
     *
     * @param  string  $name
     * @param  string|null  $attribute
     * @param  string|null  $disk
     * @param  callable|null  $storageCallback
     * @return void
     */
    public function __construct($name, $attribute = null, $disk = 'cloudinary', $storageCallback = null)
    {
        parent::__construct($name, $attribute, $disk, $storageCallback);

        $this->store(function(Request $request, $model, $attribute, $requestAttribute){

            $filename = $request->file($requestAttribute)->store($this->getStorageDir(), [
                'disk' => $this->getStorageDisk(),
                'cloudinary' => $this->cloudinaryOptions
            ]);

            // If a folder is specified we ensure a trailing slash
            // If no folder is specified we ensure no beginning slash
            $path = array_key_exists('folder',$this->cloudinaryOptions) ? rtrim($this->cloudinaryOptions['folder'], '/') . '/' : '';

            return $path . $filename;

        })->thumbnail(function () {
            return $this->value ? cloudinary_image($this->value, [
                'width' => 64,
                'height' => 64,
                'crop' => 'fill',
                'fetch_format' => 'auto',
            ], $this->disk) : null;
        })->preview(function () {
            return $this->value ? cloudinary_image($this->value, [
                'width' => 318,
                'fetch_format' => 'auto',
            ], $this->disk) : null;
        })->download(function () {

            // Get Cloudinary URL of image
            $image_address = cloudinary_image($this->value);

            // Get filename without folders
            $filename = substr( strrchr( $this->value, '/' ), 1 );

            return response()->streamDownload(function () use ($image_address) {
                echo file_get_contents($image_address);
            }, $filename);
        })->delete(function (Request $request, $model) {
            $path = pathinfo($model->{$this->attribute});

            $deletepath = $path['filename'];

            if(array_key_exists('dirname',$path) && $path['dirname'] != '.'){
                $deletepath = $path['dirname'] .'/'.$deletepath;
            }

            Storage::disk($this->disk)->delete($deletepath);
            return $this->columnsThatShouldBeDeleted();
        });
    }
}